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Annex Cuttings Facility
Impact Analysis - Table of Contents
Garfield County Administrative Review, 2020 Page 1 of 1
Impact Analysis Tab
Table of Contents
1. Impact Analysis Narrative 2. Soils Report 3. Recorded Climate Summary 4. Natural and Geologic Hazardous Report 5. Sensitive Area Survey 6. Traffic Summary Report 7. Site Photos
Annex Cuttings Facility
Article 4 Section 203.G.
Impact Analysis Narrative
1.0) Introduction The following section addresses the requirements for the Impact Analysis under Article 4 Section 203.G. of the Garfield County Land Use and Development Code (LUDC).
1.1) Required Exhibits The Impact Analysis shall provide a description of the impacts that this proposed land use change may cause, based upon the standards that the proposed use must satisfy. The application includes exhibits and descriptions of how Laramie will ensure that impacts will be mitigated, and standards will be satisfied in the development of the Cascade Creek 697-15-54 Annex Cuttings Facility (ACF).
2.0) 4-203 (G) 1. Adjacent Land Use
Existing use of adjacent property and neighboring properties within 1,500-foot radius. Existing use of adjacent property and neighboring properties are natural resources extraction, public lands, and agricultural. Adjacent parcels are zoned resource lands or public lands. No additional impact would occur to the abutting property owners from grading activities and/or operation of the ACF. The proposed site is located on a 10,100-acre parcel.
2.1) 4-203 (G) 2. Site Features
A description of site features such as streams, areas subject to flooding, lakes, high ground water
areas, topography, vegetative cover, climatology, and other features that may aid in the evaluation of
the proposed development. The ACF is located on the plateau of the Roan Plateau. Area surrounding the ACF is consists of gentle slopes. The average annual precipitation for the area is approximately 16.45 inches a year. This data was collected from the Western Regional Weather Center at the Altenbern Colorado weather station, which is located west of the proposed site location. Precipitation data was collected from 1947 to 2016. JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC Annual Average Annual Precipitation Average (Inches)
1.29 1.23 1.42 1.45 1.5 0.95 1.24 1.61 1.54 1.62 1.3 1.3 16.45
Evaporation rates were not collected at the Altenbern weather station. An evaporation rate approximately 40-45 inches a year was estimated using Map 3 of the “NOAA Technical Report NWS: Evaporation Atlas for the Contiguous 48 Unites States”. Weather Data Resources:
• NOAA Climatological Data Annual Summary: Colorado 2018, Volume 123 Number 13, ISSN 0145-0506.
• NOAA Technical Report NWS 33: Evaporation Atlas for the Contiguous 48 United States; Washington, D.C., June 1982.
Laramie Energy, LLC Annex Cuttings Facility
Impact Analysis Narrative
Article 4 Section 203.G. – Impact Analysis Garfield County Administrative Review, 2020 2 | Page
• NOAA Technical Report NWS 34: Mean Monthly, Seasonal, and Annual Pan Evaporation for the United States; Washington, D.C., June 1982.
• ALTENBERN, COLORADO Period of Record Monthly Climate Summary; Western Regional Weather Center (Impact Analysis tab) There are no streams, areas subject to flooding, high ground water areas, and lakes within the perimeter of the site. Intermittent streams that flow into McKay Gulch are located 979 feet to the southeast and 1143 feet to northeast. An unnamed intermittent stream is located to the 1920 feet to the west. The Surface Hydrology Map is located in the Grading and Drainage Plan tab.
2.2) Section 4-203 (G) 3. Soil Characteristics
A description of soil characteristics of the site that have a significant influence on the proposed use of
the land. A soils report from the Natural Resource Conservation Service (NRCS) indicates that within the proposed site perimeter and part of the surrounding area is the Parachute-Irigul-Rhone association (Map Unit 56) soils. The area bordering the northeast site perimeter is the Northwater-Adel complex (Map Unit 52) soils. The Parachute-Irigul-Rhone (25-50 percent slopes) association soil unit is composed of Parachute and similar soils (35%), Irigul and similar soils (30%), Rhone and similar soil (30%) and minor components (5%). Parachute, Irigul, and Rhone all originated from accumulated weathered sandstone and shale Each have a water transmission rate that is low to moderately high at 0.01 to 0.57 inches per hour. Parachute is a well drained soil with low available water storage of about 3.9 inches. Parachute is classified as hydrologic soil group C which defines the soil as having a slow infiltration rate when thoroughly wet. Typical profile: A - 0 to 10 inches: loam Bw - 10 to 25 inches: very channery loam R - 25 to 60 inches: bedrock The NRCS states Irigul is a well drained soil with very low available water storage of about 1.5 inches. Irigul is classified as hydrologic soil group D which defines soils as having a very low infiltration rate when wet. This means the soils in group D have a higher potential for run off. Typical Profile: A1 - 0 to 6 inches: channery loam A2 - 6 to 13 inches: very channery loam R - 13 to 60 inches: bedrock Rhone is a well drained soil with moderate available water storage of about 8.3 inches. The NRCS classifies Rhone as hydrologic soil group B which is defined as having moderate infiltration rate when thoroughly wet. Typical Profile: A1 - 0 to 10 inches: loam A2 - 10 to 39 inches: channery loam C - 39 to 55 inches: very channery loam R - 55 to 60 inches: bedrock NRCS soil reports and soil map are located in the Soils Report, provided in the Impact Analysis tab.
2.3) Section 4-203 (G) 4. Geology and Hazard
Laramie Energy, LLC Annex Cuttings Facility
Impact Analysis Narrative
Article 4 Section 203.G. – Impact Analysis Garfield County Administrative Review, 2020 3 | Page
A description of the geologic characteristics of the area including any potential natural or manmade
hazards, and a determination of what effect such factors would have on the proposed use of the land.
The Geologic and Hydrologic Hazards Report determined landslides, rockfall, collapsible soils, and avalanches are not a hazard at the location. The site is located on slopes which exceed 20% locally. The report recommended that the site should be designed by a Colorado licensed Professional Engineer. The ACF was designed and approved by D.R. Griffin’s Colorado licensed P.E. The ACF Engineering Design Plan (Grading and Drainage Plan tab) details slope stabilization BMPs and erosion control features. The site has been designed to mitigate potential slope hazards. The Geologic and Hydrologic Hazards Report and site photos are located in the Impact Analysis tab.
2.4) Section 4-203 (G) 6. Environmental Impacts
Determination of the existing environmental conditions on the parcel to be developed and the effects
of development on those conditions.
WestWater Engineering, Inc. (WaterWater) conducted an environmental impact study. Details on, wildlife, vegetation, figures, and recommendations are described in the Sensitive Areas Study, located in the Impact Analysis tab.
a. Determination of the long-term and short-term effect on flora and fauna;
WestWater concluded that no threatened or endangered species of plants would be affected by the project. The long-term effects of vegetation removal for the project are minimal once revegetation and reclamation have occurred. The site is adjacent to existing disturbances and would not further fragment existing habitat.
b. Determination of the effect on designated environmental resources, including critical wildlife
habitat
Suitable nesting habitat for birds would not be directly affected by the project. Wildlife in the project area has become somewhat habituated to human activity and indirect impacts from construction of this project would be low. The presence of construction personnel and noise has a low potential to affect wildlife in a negative manner, since the construction activities would be short in duration, occur during daylight hours, and occur adjacent to and within an area of current human activity.
c. Impacts on wildlife and domestic animals through creation of hazardous attractions, alteration of
existing native vegetation, blockade of migration routes, use patterns, or other disruptions
No migration corridors will be affected. Big game species are not restricted to specific movement in the adjacent corridors in this area and the facility will not pose as barrier. WestWater stated fencing is not recommended, which could alter daily big game movements on a small scale.
d. Evaluation of any potential radiation hazard that may have been identified by the State or County
Health Departments.
The Geologic and Hydrological Hazards Report (Impact Analysis tab) states radioactive minerals are not anticipated in the geologic section exposed at the site location.
Laramie Energy, LLC Annex Cuttings Facility
Impact Analysis Narrative
Article 4 Section 203.G. – Impact Analysis Garfield County Administrative Review, 2020 4 | Page
2.5) Section 4-203 (G) 7. Nuisance
Impacts on adjacent land from generation of vapor, dust, smoke, noise, glare or vibration, or other
emanations. Nuisance from noise, lighting, and dust is not anticipated. No lighting or utilities will be installed at the proposed site. While not anticipated, in the event that temporary lighting is required during grading or unloading activities, all temporary lighting will be directed inward, towards the interior of the proposed site. All lighting will adhere to the Lighting Standards stated in Article 7 of the Garfield County LUDC. The subject site will adhere to Colorado Oil and Gas Conservation Commission (COGCC) noise control regulations. The ACF will comply with regulation 802.b. for permissible noise levels, “Oil and gas operations at any well site, production facility, or gas facility shall comply with the
following maximum permissible noise levels.” In accordance with regulation 802.b.2., the ACF will operate within the light industrial standard since an occupied structure is not located within close proximity to the proposed site location. ZONE 7:00 am to next 7:00 pm 7:00 pm to next 7:00 am Light industrial 70 db(A) 65 db(A) The nearest structure to the site is an unoccupied hunting cabin, approximately 2,600 feet to the east. Varying natural topography and vegetation create a sound natural buffer for the cabin. The cabin is not visible from the site. Nuisance from noise is not anticipated at the site. Permanent equipment, engines, and structures will not be installed at the site. Noise generated at the site will be similar to other oil and gas activities in the area. Laramie implements fugitive dust controls throughout the Cascade Field. Employees are trained to identify conditions and operate to minimize fugitive dust emissions. In order to prevent fugitive dust Laramie has incorporated several practices. Appropriate speed limits have been designated for vehicles on unpaved roadways. Restriction of land disturbance construction activity during high-wind days are also enforced. Field employees will notify operations if dust is observed. Water trucks are utilized to wet roadways, as needed, when natural moisture is insufficient to prevent airborne dust. Water trucks apply magnesium chloride or fresh water to roadways depending on location. Laramie’s access roads within the transportation route (Hauling Route Map and Laramie Access Road Map, located in the Maps and Plans) are treated with fresh water to reduce dust emissions. The site will be accessed by a private lease road currently owned and maintained by Laramie. The site is located on a 10,100-acre parcel, surrounding by public land and other resource lands parcels. The ACF will not be visible from any public road and will adhere to COGCC 804. Visual Impact mitigation regulation. Traffic associated with the three future well pads will be reduced on public roadways with the development of the proposed site. The ACF will reduce the cumulative impacts of these well pads by providing drill cutting treatment in the field and reducing the need for semitrucks to haul drilling cuttings by way of public roadways for final disposal at a landfill.
Laramie Energy, LLC Annex Cuttings Facility
Impact Analysis Narrative
Article 4 Section 203.G. – Impact Analysis Garfield County Administrative Review, 2020 5 | Page
The existing site will be graded for the development of a drill cutting’s treatment facility. Vehicle activities during initial grading activities will consist of (3) pickup trucks per day and one (1) mobilization of excavation equipment. The excavator will be mobilized to the site and remain on-site until initial grading, transportation, and treatment activities are completed. Initial grading activities will take up to 10 days to completed. Vehicle activities during treatment activities will consist of five (5) pickup truck trips monthly to the site. Treatment activities will occur over a period of time, last approximately 2 years. Laramie does not anticipate active treatment during winter months. Reclamation and final grading/contouring activities may coincide with treatment activities and will take 27 days to complete. During periods final grading, vehicle activities will consist of (2) pickup trucks per day and one (1) mobilization of a bulldozer. Vegetation and reclamation inspections activities will be conducted by personnel performing inspections at other facilities in the field and will not generate additional traffic.
2.6) Section 4-203 (G) 8. Hours of Operation.
The Applicant shall submit information on the hours operation of the proposed use.
The CC 697-15-54 Annex Cuttings Facility will not have personnel staffed at the site on a regular continuous basis with personnel only being present during grading activities and the unloading and treatment of cuttings. When personnel are working at ACF hours of operation will not exceed a 10-hour workday. During grading activities, personnel will access and operate the facility full time until grading activities are finalized. Initial grading activities prior to the delivery of cuttings will take up to 14 days to complete. Once initial grading activities are completed, the site will be access for cuttings delivery and treatment. The delivery of dried untreated cuttings will take 3-5 days for transportation and unloading per treatment phase. The site will also be assessed for sampling activities, inspections, and maintenance. Grading activities per treatment phase will take approximately 2-3 days. Final grading for reclamation will take 1-2 days. The site is not located in close proximity to any residences and is located in and adjacent to the Resource Lands zone district. Adjacent land uses include natural resource activities and public lands.
Annex Cuttings Facility
Soils Report
Map Unit Description
The map units delineated on the detailed soil maps in a soil survey represent the
soils or miscellaneous areas in the survey area. The map unit descriptions in this
report, along with the maps, can be used to determine the composition and
properties of a unit.
A map unit delineation on a soil map represents an area dominated by one or
more major kinds of soil or miscellaneous areas. A map unit is identified and
named according to the taxonomic classification of the dominant soils. Within a
taxonomic class there are precisely defined limits for the properties of the soils.
On the landscape, however, the soils are natural phenomena, and they have the
characteristic variability of all natural phenomena. Thus, the range of some
observed properties may extend beyond the limits defined for a taxonomic class.
Areas of soils of a single taxonomic class rarely, if ever, can be mapped without
including areas of other taxonomic classes. Consequently, every map unit is
made up of the soils or miscellaneous areas for which it is named, soils that are
similar to the named components, and some minor components that differ in use
and management from the major soils.
Most of the soils similar to the major components have properties similar to those
of the dominant soil or soils in the map unit, and thus they do not affect use and
management. These are called noncontrasting, or similar, components. They
may or may not be mentioned in a particular map unit description. Some minor
components, however, have properties and behavior characteristics divergent
enough to affect use or to require different management. These are called
contrasting, or dissimilar, components. They generally are in small areas and
could not be mapped separately because of the scale used. Some small areas of
strongly contrasting soils or miscellaneous areas are identified by a special
symbol on the maps. If included in the database for a given area, the contrasting
minor components are identified in the map unit descriptions along with some
characteristics of each. A few areas of minor components may not have been
observed, and consequently they are not mentioned in the descriptions,
especially where the pattern was so complex that it was impractical to make
enough observations to identify all the soils and miscellaneous areas on the
landscape.
The presence of minor components in a map unit in no way diminishes the
usefulness or accuracy of the data. The objective of mapping is not to delineate
pure taxonomic classes but rather to separate the landscape into landforms or
landform segments that have similar use and management requirements. The
delineation of such segments on the map provides sufficient information for the
development of resource plans. If intensive use of small areas is planned,
however, onsite investigation is needed to define and locate the soils and
miscellaneous areas.
An identifying symbol precedes the map unit name in the map unit descriptions.
Each description includes general facts about the unit and gives important soil
properties and qualities.
Map Unit Description: Parachute-Irigul-Rhone association, 25 to 50 percent slopes MLRA
48A---Douglas-Plateau Area, Colorado, Parts of Garfield and Mesa Counties
Natural Resources
Conservation Service
Web Soil Survey
National Cooperative Soil Survey
7/13/2020
Page 1 of 5
Soils that have profiles that are almost alike make up a soil series. All the soils of
a series have major horizons that are similar in composition, thickness, and
arrangement. Soils of a given series can differ in texture of the surface layer,
slope, stoniness, salinity, degree of erosion, and other characteristics that affect
their use. On the basis of such differences, a soil series is divided into soil
phases. Most of the areas shown on the detailed soil maps are phases of soil
series. The name of a soil phase commonly indicates a feature that affects use or
management. For example, Alpha silt loam, 0 to 2 percent slopes, is a phase of
the Alpha series.
Some map units are made up of two or more major soils or miscellaneous areas.
These map units are complexes, associations, or undifferentiated groups.
A complex consists of two or more soils or miscellaneous areas in such an
intricate pattern or in such small areas that they cannot be shown separately on
the maps. The pattern and proportion of the soils or miscellaneous areas are
somewhat similar in all areas. Alpha-Beta complex, 0 to 6 percent slopes, is an
example.
An association is made up of two or more geographically associated soils or
miscellaneous areas that are shown as one unit on the maps. Because of
present or anticipated uses of the map units in the survey area, it was not
considered practical or necessary to map the soils or miscellaneous areas
separately. The pattern and relative proportion of the soils or miscellaneous
areas are somewhat similar. Alpha-Beta association, 0 to 2 percent slopes, is an
example.
An undifferentiated group is made up of two or more soils or miscellaneous areas
that could be mapped individually but are mapped as one unit because similar
interpretations can be made for use and management. The pattern and
proportion of the soils or miscellaneous areas in a mapped area are not uniform.
An area can be made up of only one of the major soils or miscellaneous areas, or
it can be made up of all of them. Alpha and Beta soils, 0 to 2 percent slopes, is
an example.
Some surveys include miscellaneous areas. Such areas have little or no soil
material and support little or no vegetation. Rock outcrop is an example.
Additional information about the map units described in this report is available in
other soil reports, which give properties of the soils and the limitations,
capabilities, and potentials for many uses. Also, the narratives that accompany
the soil reports define some of the properties included in the map unit
descriptions.
Douglas-Plateau Area, Colorado, Parts of Garfield and
Mesa Counties
56—Parachute-Irigul-Rhone association, 25 to 50 percent
slopes MLRA 48A
Map Unit Setting
National map unit symbol: 2w4z7
Elevation: 7,600 to 8,800 feet
Map Unit Description: Parachute-Irigul-Rhone association, 25 to 50 percent slopes MLRA
48A---Douglas-Plateau Area, Colorado, Parts of Garfield and Mesa Counties
Natural Resources
Conservation Service
Web Soil Survey
National Cooperative Soil Survey
7/13/2020
Page 2 of 5
Mean annual precipitation: 18 to 22 inches
Mean annual air temperature: 36 to 40 degrees F
Frost-free period: 60 to 70 days
Farmland classification: Not prime farmland
Map Unit Composition
Parachute and similar soils: 35 percent
Rhone and similar soils: 30 percent
Irigul and similar soils: 30 percent
Minor components: 5 percent
Estimates are based on observations, descriptions, and transects of
the mapunit.
Description of Parachute
Setting
Landform: Mountain slopes
Landform position (three-dimensional): Mountainflank
Down-slope shape: Convex
Across-slope shape: Convex
Parent material: Colluvium over residuum weathered from
sandstone and shale
Typical profile
A - 0 to 10 inches: loam
Bw - 10 to 25 inches: very channery loam
R - 25 to 60 inches: bedrock
Properties and qualities
Slope: 25 to 50 percent
Depth to restrictive feature: 20 to 39 inches to lithic bedrock
Natural drainage class: Well drained
Capacity of the most limiting layer to transmit water (Ksat): Low to
moderately high (0.01 to 0.57 in/hr)
Depth to water table: More than 80 inches
Frequency of flooding: None
Frequency of ponding: None
Salinity, maximum in profile: Nonsaline to very slightly saline (0.0
to 2.0 mmhos/cm)
Available water storage in profile: Low (about 3.9 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 7e
Hydrologic Soil Group: C
Hydric soil rating: No
Description of Irigul
Setting
Landform: Mountain slopes
Landform position (three-dimensional): Mountainflank
Down-slope shape: Concave
Across-slope shape: Convex
Map Unit Description: Parachute-Irigul-Rhone association, 25 to 50 percent slopes MLRA
48A---Douglas-Plateau Area, Colorado, Parts of Garfield and Mesa Counties
Natural Resources
Conservation Service
Web Soil Survey
National Cooperative Soil Survey
7/13/2020
Page 3 of 5
Parent material: Colluvium over residuum weathered from
sandstone and shale
Typical profile
A1 - 0 to 6 inches: channery loam
A2 - 6 to 13 inches: very channery loam
R - 13 to 60 inches: bedrock
Properties and qualities
Slope: 25 to 50 percent
Depth to restrictive feature: 10 to 20 inches to lithic bedrock
Natural drainage class: Well drained
Capacity of the most limiting layer to transmit water (Ksat): Low to
moderately high (0.01 to 0.57 in/hr)
Depth to water table: More than 80 inches
Frequency of flooding: None
Frequency of ponding: None
Salinity, maximum in profile: Nonsaline to very slightly saline (0.0
to 2.0 mmhos/cm)
Available water storage in profile: Very low (about 1.5 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 7e
Hydrologic Soil Group: D
Hydric soil rating: No
Description of Rhone
Setting
Landform: Mountain slopes
Landform position (three-dimensional): Mountainflank
Down-slope shape: Convex
Across-slope shape: Concave
Parent material: Colluvium over residuum weathered from
sandstone and shale
Typical profile
A1 - 0 to 10 inches: loam
A2 - 10 to 39 inches: channery loam
C - 39 to 55 inches: very channery loam
R - 55 to 60 inches: bedrock
Properties and qualities
Slope: 25 to 50 percent
Depth to restrictive feature: 39 to 59 inches to lithic bedrock
Natural drainage class: Well drained
Capacity of the most limiting layer to transmit water (Ksat): Low to
moderately high (0.01 to 0.57 in/hr)
Depth to water table: More than 80 inches
Frequency of flooding: None
Frequency of ponding: None
Salinity, maximum in profile: Nonsaline to very slightly saline (0.0
to 2.0 mmhos/cm)
Map Unit Description: Parachute-Irigul-Rhone association, 25 to 50 percent slopes MLRA
48A---Douglas-Plateau Area, Colorado, Parts of Garfield and Mesa Counties
Natural Resources
Conservation Service
Web Soil Survey
National Cooperative Soil Survey
7/13/2020
Page 4 of 5
Available water storage in profile: Moderate (about 8.3 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 7e
Hydrologic Soil Group: B
Hydric soil rating: No
Minor Components
Starman
Percent of map unit: 5 percent
Landform: Mountain slopes
Landform position (three-dimensional): Mountainflank
Down-slope shape: Linear
Across-slope shape: Concave
Ecological site: Dry Exposure (R048AY235CO)
Hydric soil rating: No
Data Source Information
Soil Survey Area: Douglas-Plateau Area, Colorado, Parts of Garfield and Mesa
Counties
Survey Area Data: Version 13, Jun 5, 2020
Map Unit Description: Parachute-Irigul-Rhone association, 25 to 50 percent slopes MLRA
48A---Douglas-Plateau Area, Colorado, Parts of Garfield and Mesa Counties
Natural Resources
Conservation Service
Web Soil Survey
National Cooperative Soil Survey
7/13/2020
Page 5 of 5
Map Unit Description
The map units delineated on the detailed soil maps in a soil survey represent the
soils or miscellaneous areas in the survey area. The map unit descriptions in this
report, along with the maps, can be used to determine the composition and
properties of a unit.
A map unit delineation on a soil map represents an area dominated by one or
more major kinds of soil or miscellaneous areas. A map unit is identified and
named according to the taxonomic classification of the dominant soils. Within a
taxonomic class there are precisely defined limits for the properties of the soils.
On the landscape, however, the soils are natural phenomena, and they have the
characteristic variability of all natural phenomena. Thus, the range of some
observed properties may extend beyond the limits defined for a taxonomic class.
Areas of soils of a single taxonomic class rarely, if ever, can be mapped without
including areas of other taxonomic classes. Consequently, every map unit is
made up of the soils or miscellaneous areas for which it is named, soils that are
similar to the named components, and some minor components that differ in use
and management from the major soils.
Most of the soils similar to the major components have properties similar to those
of the dominant soil or soils in the map unit, and thus they do not affect use and
management. These are called noncontrasting, or similar, components. They
may or may not be mentioned in a particular map unit description. Some minor
components, however, have properties and behavior characteristics divergent
enough to affect use or to require different management. These are called
contrasting, or dissimilar, components. They generally are in small areas and
could not be mapped separately because of the scale used. Some small areas of
strongly contrasting soils or miscellaneous areas are identified by a special
symbol on the maps. If included in the database for a given area, the contrasting
minor components are identified in the map unit descriptions along with some
characteristics of each. A few areas of minor components may not have been
observed, and consequently they are not mentioned in the descriptions,
especially where the pattern was so complex that it was impractical to make
enough observations to identify all the soils and miscellaneous areas on the
landscape.
The presence of minor components in a map unit in no way diminishes the
usefulness or accuracy of the data. The objective of mapping is not to delineate
pure taxonomic classes but rather to separate the landscape into landforms or
landform segments that have similar use and management requirements. The
delineation of such segments on the map provides sufficient information for the
development of resource plans. If intensive use of small areas is planned,
however, onsite investigation is needed to define and locate the soils and
miscellaneous areas.
An identifying symbol precedes the map unit name in the map unit descriptions.
Each description includes general facts about the unit and gives important soil
properties and qualities.
Map Unit Description: Northwater-Adel complex, 5 to 50 percent slopes---Douglas-Plateau
Area, Colorado, Parts of Garfield and Mesa Counties
Natural Resources
Conservation Service
Web Soil Survey
National Cooperative Soil Survey
7/13/2020
Page 1 of 4
Soils that have profiles that are almost alike make up a soil series. All the soils of
a series have major horizons that are similar in composition, thickness, and
arrangement. Soils of a given series can differ in texture of the surface layer,
slope, stoniness, salinity, degree of erosion, and other characteristics that affect
their use. On the basis of such differences, a soil series is divided into soil
phases. Most of the areas shown on the detailed soil maps are phases of soil
series. The name of a soil phase commonly indicates a feature that affects use or
management. For example, Alpha silt loam, 0 to 2 percent slopes, is a phase of
the Alpha series.
Some map units are made up of two or more major soils or miscellaneous areas.
These map units are complexes, associations, or undifferentiated groups.
A complex consists of two or more soils or miscellaneous areas in such an
intricate pattern or in such small areas that they cannot be shown separately on
the maps. The pattern and proportion of the soils or miscellaneous areas are
somewhat similar in all areas. Alpha-Beta complex, 0 to 6 percent slopes, is an
example.
An association is made up of two or more geographically associated soils or
miscellaneous areas that are shown as one unit on the maps. Because of
present or anticipated uses of the map units in the survey area, it was not
considered practical or necessary to map the soils or miscellaneous areas
separately. The pattern and relative proportion of the soils or miscellaneous
areas are somewhat similar. Alpha-Beta association, 0 to 2 percent slopes, is an
example.
An undifferentiated group is made up of two or more soils or miscellaneous areas
that could be mapped individually but are mapped as one unit because similar
interpretations can be made for use and management. The pattern and
proportion of the soils or miscellaneous areas in a mapped area are not uniform.
An area can be made up of only one of the major soils or miscellaneous areas, or
it can be made up of all of them. Alpha and Beta soils, 0 to 2 percent slopes, is
an example.
Some surveys include miscellaneous areas. Such areas have little or no soil
material and support little or no vegetation. Rock outcrop is an example.
Additional information about the map units described in this report is available in
other soil reports, which give properties of the soils and the limitations,
capabilities, and potentials for many uses. Also, the narratives that accompany
the soil reports define some of the properties included in the map unit
descriptions.
Douglas-Plateau Area, Colorado, Parts of Garfield and
Mesa Counties
52—Northwater-Adel complex, 5 to 50 percent slopes
Map Unit Setting
National map unit symbol: 2w4zk
Elevation: 7,710 to 8,600 feet
Mean annual precipitation: 18 to 25 inches
Map Unit Description: Northwater-Adel complex, 5 to 50 percent slopes---Douglas-Plateau
Area, Colorado, Parts of Garfield and Mesa Counties
Natural Resources
Conservation Service
Web Soil Survey
National Cooperative Soil Survey
7/13/2020
Page 2 of 4
Mean annual air temperature: 36 to 40 degrees F
Frost-free period: 45 to 75 days
Farmland classification: Not prime farmland
Map Unit Composition
Northwater and similar soils: 50 percent
Adel and similar soils: 40 percent
Minor components: 10 percent
Estimates are based on observations, descriptions, and transects of
the mapunit.
Description of Northwater
Setting
Landform: Mountain slopes
Landform position (three-dimensional): Mountainflank
Down-slope shape: Linear
Across-slope shape: Linear
Parent material: Colluvium over residuum weathered from
sedimentary rock
Typical profile
A - 0 to 28 inches: loam
Bt - 28 to 48 inches: very channery loam
R - 48 to 60 inches: bedrock
Properties and qualities
Slope: 5 to 50 percent
Depth to restrictive feature: 39 to 59 inches to lithic bedrock
Natural drainage class: Well drained
Capacity of the most limiting layer to transmit water (Ksat): Low to
moderately high (0.01 to 0.57 in/hr)
Depth to water table: More than 80 inches
Frequency of flooding: None
Frequency of ponding: None
Salinity, maximum in profile: Nonsaline (0.0 to 1.0 mmhos/cm)
Available water storage in profile: Moderate (about 7.9 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 7e
Hydrologic Soil Group: B
Other vegetative classification: Quaking aspen/mountain
snowberry (POTR5/SYOR2) (D0511)
Hydric soil rating: No
Description of Adel
Setting
Landform: Mountain slopes
Landform position (three-dimensional): Mountainbase
Down-slope shape: Concave
Across-slope shape: Linear
Map Unit Description: Northwater-Adel complex, 5 to 50 percent slopes---Douglas-Plateau
Area, Colorado, Parts of Garfield and Mesa Counties
Natural Resources
Conservation Service
Web Soil Survey
National Cooperative Soil Survey
7/13/2020
Page 3 of 4
Parent material: Alluvium and/or colluvium derived from
sedimentary rock
Typical profile
A1 - 0 to 20 inches: clay loam
A2 - 20 to 31 inches: loam
C - 31 to 60 inches: loam
Properties and qualities
Slope: 5 to 30 percent
Depth to restrictive feature: More than 80 inches
Natural drainage class: Well drained
Capacity of the most limiting layer to transmit water (Ksat):
Moderately high (0.21 to 0.71 in/hr)
Depth to water table: More than 80 inches
Frequency of flooding: None
Frequency of ponding: None
Calcium carbonate, maximum in profile: 5 percent
Salinity, maximum in profile: Nonsaline (0.0 to 1.0 mmhos/cm)
Available water storage in profile: High (about 10.1 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 6e
Hydrologic Soil Group: C
Other vegetative classification: Engelmann spruce/grouse
whortleberry (PIEN/VASC) (C0414)
Hydric soil rating: No
Minor Components
Rhone
Percent of map unit: 10 percent
Landform: Mountain slopes
Landform position (three-dimensional): Mountainflank
Down-slope shape: Linear
Across-slope shape: Linear
Hydric soil rating: No
Data Source Information
Soil Survey Area: Douglas-Plateau Area, Colorado, Parts of Garfield and Mesa
Counties
Survey Area Data: Version 13, Jun 5, 2020
Map Unit Description: Northwater-Adel complex, 5 to 50 percent slopes---Douglas-Plateau
Area, Colorado, Parts of Garfield and Mesa Counties
Natural Resources
Conservation Service
Web Soil Survey
National Cooperative Soil Survey
7/13/2020
Page 4 of 4
ALTENBERN, COLORADO Period of Record Monthly Climate Summary
file:///C/...ments/Projects/Cuttings%20Permitting/GarCo%20Permitting/Impact%20Analysis%20tab/Weather%20Documents/cliRECtM.html[12/6/2020 9:44:14 PM]
ALTENBERN, COLORADO (050214)
Period of Record Monthly Climate Summary
Period of Record : 07/01/1947 to 06/10/2016
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Average Max.
Temperature (F)36.6 43.0 53.0 62.3 72.5 83.3 89.4 86.1 77.5 65.3 49.5 38.1 63.0
Average Min.
Temperature (F)10.2 16.6 23.5 29.9 37.4 43.9 50.4 49.1 41.1 31.3 21.2 12.3 30.6
Average Total
Precipitation (in.)1.29 1.23 1.42 1.45 1.50 0.95 1.24 1.61 1.54 1.62 1.30 1.30 16.45
Average Total SnowFall
(in.)16.5 11.0 8.1 3.0 0.6 0.1 0.0 0.0 0.1 1.3 7.6 15.1 63.4
Average Snow Depth
(in.)No Data
Percent of possible observations for period of record.
Max. Temp.: 80.6% Min. Temp.: 80.5% Precipitation: 99.9% Snowfall: 99.4% Snow Depth: 94.4%
Check Station Metadata or Metadata graphics for more detail about data completeness.
Western Regional Climate Center, wrcc@dri.edu
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Geological and Hydrological Hazards Report
Laramie Energy
Cascade Creek 697-15-54 Annex Cuttings Facility
Project Number 020-014
December 10, 2020
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Contents
1.0 INTRODUCTION ................................................................................................................................. 3
2.0 SITE GEOLOGY ................................................................................................................................... 3
2.1 SITE OVERVIEW ............................................................................................................................. 3
2.2 STRUCTURAL GEOLOGY ................................................................................................................ 3
2.3 BEDROCK GEOLOGY ...................................................................................................................... 3
2.4 SOILS ............................................................................................................................................. 4
2.5 HYDROLOGY .................................................................................................................................. 5
3.0 GEOLOGIC HAZARDS FROM GARFIELD COUNTY LUDC ..................................................................... 6
3.1 UTILITIES ........................................................................................................................................ 6
3.2 AVALANCHE HAZARD .................................................................................................................... 6
3.3 LANDSLIDE HAZARD ...................................................................................................................... 6
3.4 ROCKFALL HAZARD........................................................................................................................ 6
3.5 ALLUVIAL FAN HAZARD ................................................................................................................. 6
3.6 SLOPE DEVELOPMENT ................................................................................................................... 6
3.7 CORROSIVE OR EXPANSIVE SOILS OR ROCK .................................................................................. 6
3.8 MUDFLOW OR DEBRIS FLOW HAZARD ......................................................................................... 7
3.9 DEVELOPMENT OVER FAULTS AND EARTHQUAKE HAZARDS ....................................................... 7
4.0 OTHER GEOLOGIC HAZARDS ............................................................................................................. 7
4.1 FLOOD HAZARDS ........................................................................................................................... 7
4.2 COLLAPSIBLE SOILS ....................................................................................................................... 7
4.3 MINING ACTIVITIES ....................................................................................................................... 8
4.4 RADIOACTIVE HAZARDS ................................................................................................................ 8
4.5 VOLCANIC HAZARDS ..................................................................................................................... 8
5.0 Conclusions and Summary ................................................................................................................ 8
6.0 Figure List .......................................................................................................................................... 9
7.0 References ........................................................................................................................................ 9
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1.0 INTRODUCTION
Laramie Energy LLC (Laramie) retained Entrada Consulting Group, Inc. (Entrada) to develop a
Geological Hazards Report for submittal to the Colorado Oil and Gas Conservation Commission
(COGCC) and to Garfield County for the proposed Cascade Creek 697-15-54 Annex Cuttings
Facility.
2.0 SITE GEOLOGY
2.1 SITE OVERVIEW
The Site is located on the Roan Plateau which lies within the Piceance Creek Basin and the
Colorado Plateau physiographic region. The topography of the area consists of rolling hills atop
a plateau that is bounded by cliffs and cut by deeply incised, steep walled canyons. The Site is
located on topographic high-ground 9.25 miles northwest of Parachute, Colorado at an
approximate elevation of 8,630 feet above mean sea level. The Site is located in the SWSE of
section 15, range 97W, township 6S. Latitude and Longitude for the Site are 39.519240°and -
108.201666° respectively.
2.2 STRUCTURAL GEOLOGY
The Piceance Creek Basin is a large structural and depositional basin that is bounded by the
Yampa Plateau, Axial Basin Arch, White River Uplift, Gunnison Uplift, Uncompagre Uplift, and
Douglas Creek Arch. The Piceance Creek Basin was formed during the Laramide Orogeny and
structural formation of the basin lasted from Late Cretaceous through the Tertiary. The
sediments within the basin were sourced from surrounding highlands and were subsequently
lithified and structurally deformed.
The Site is located at the crest of the Crystal Creek Anticlinal Nose, a plunging fold that is located
roughly along trend with the larger Douglas Creek Anticline to the northwest. Increased jointing
of bedrock is possible along anticlinal features. The Clear Creek Syncline is located approximately
3.4 miles southwest of the Site. There are no major faults in the area, however there are a series
of grabens (normal faults) located 10-15 miles north of the Site.
2.3 BEDROCK GEOLOGY
The bedrock geology underlying the Site is composed of the Uinta Formation which is underlain
by the Green River Formation. The Green River formation can be subdivided into the lower Green
River and the Parachute Creek Member. The Lower Green River can be further subdivided into
Anvil Points, Garden Gulch, and Douglas Creek Members. Both the Uinta and Green River
formations are Eocene in age. Geologic units on and adjacent to the Site can be found in Figure
1.
The Uinta formation is approximately 370 feet thick at the Site location and consists of
tuffaceaous sandstones and siltstones, marlstones, oil shale, conglomeratic sandstones, and
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limestones. The underlying Green River formation is approximately 2,100 feet thick and consists
of oil shale, dolomitic shale, clay shale, limestone, siltstone, sandstone, and tuff. Intertounging
between the Green River and Uinta formations is common in this area.
2.4 SOILS
A soils report from the Natural Resource Conservation Service (NRCS) indicates that within the
proposed site perimeter and part of the surrounding area is the Parachute-Irigul-Rhone
association (Map Unit 56) soils. The area bordering the northeast site perimeter is the
Northwater-Adel complex (Map Unit 52) soils. Soils on and adjacent to the Site can be found on
Figure 2.
The Parachute-Irigul-Rhone association soil unit is composed of Parachute and similar soils (35%),
Irigul and similar soils (30%), Rhone and similar soil (30%) and minor components (5%).
Parachute, Irigul, and Rhone all originated from accumulated weathered sandstone and shale
Each have a water transmission rate that is low to moderately high at 0.01 to 0.57 inches per
hour.
Parachute is a well-drained soil with low available water storage of about 3.9 inches. Parachute
is classified as hydrologic soil group C which defines the soil as having a slow infiltration rate when
thoroughly wet.
Typical profile: A - 0 to 10 inches: loam
Bw - 10 to 25 inches: very channery loam
R - 25 to 60 inches: bedrock
The NRCS states Irigul is a well-drained soil with very low available water storage of about 1.5
inches. Irigul is classified as hydrologic soil group D which defines soils as having a very low
infiltration rate when wet. This means the soils in group D have a higher potential for run off.
Typical Profile: A1 - 0 to 6 inches: channery loam
A2 - 6 to 13 inches: very channery loam
R - 13 to 60 inches: bedrock
Rhone is a well-drained soil with moderate available water storage of about 8.3 inches. The NRCS
classifies Rhone as hydrologic soil group B which is defined as having moderate infiltration rate
when thoroughly wet.
Typical Profile: A1 - 0 to 10 inches: loam
A2 - 10 to 39 inches: channery loam
C - 39 to 55 inches: very channery loam
R - 55 to 60 inches: bedrock
The Northwater-Adel complex is well drained and composed of Northwater and similar soils
(50%), Adel and similar soils (40%), and minor components (10%).
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The Northwater is derived from accumulated weathered sedimentary rock. It has a moderate
available water storage of about 7.9 inches and has a water transmission rate that is low to
moderately high at 0.01 to 0.57 inches per hour. The NRCS classifies Northwater as hydrologic
soil group B which is defined as having moderate infiltration rate when thoroughly wet.
Typical Profile: A - 0 to 28 inches: loam
Bt - 28 to 48 inches: very channery loam
R - 48 to 60 inches: bedrock
NRCS states Adel is composed of alluvium and/or colluvium derived from sedimentary rock. Adel
has a high available water storage of about 10.1 inches and a moderately high water transmission
rate of 0.21 to 0.71 inches per hour. Adel is classified as hydrologic soil group C which defines the
soil as having a slow infiltration rate when thoroughly wet.
Typical Profile: A1 - 0 to 20 inches: clay loam
A2 - 20 to 31 inches: loam
C - 31 to 60 inches: loam
2.5 HYDROLOGY
All streams in the immediate area of the Site are intermittent. An unnamed intermittent stream
channel is located approximately 1,800 feet northeast of the Site. McKay Gulch is located 1,350
feet southeast of the site. Two springs are mapped within one mile of the Site; one is 2,500 feet
northeast and the other is 2,350 feet to the southwest of the Site.
Groundwater occurrences at and within proximity to the Site are expected to be associated with
the fractures in near-surface aquifers within the Uinta formation and Parachute Creek Member
of the Green River Formation. The Garden Gulch, Douglas Creek, and Anvil Points members of
the Green River Formation are considered to be hydrogeologic confining layers separating the
shallower and deeper groundwater systems.
Based on a review of online records from the Colorado Division of Water Resources (CDWR) there
is only one active permitted water well within a one-mile radius of the Site. This well is the Couey
Family LLLP domestic stock well (CDWR Permit #233234) which is 0.50 miles east-southeast of
the Site in an unnamed drainage. This well was hand-dug into a spring to a total depth of
approximately 3’.
The depth to shallow groundwater at the Site is expected to occur approximately 250 to 400 feet
below ground surface (bgs) based on regional groundwater well information and spring outcrop
elevations. Deeper groundwater is expected to occur at approximately 700 feet bgs based on
groundwater elevations in the deeper regional wells.
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3.0 GEOLOGIC HAZARDS FROM GARFIELD COUNTY LAND USE AND
DEVELOPMENT CODE
3.1 UTILITIES
No utilities will be installed at the Site.
3.2 AVALANCHE HAZARD
The Site is not located in a known Avalanche Hazard Area. The most common slope angles for
destructive avalanches range from 30-45 degrees. Slope angles generally range from 0-28
degrees in the vicinity of the Site.
3.3 LANDSLIDE HAZARD
The Site is not located in a known Landslide Hazard area. However, removal of lateral support,
altering drainage, or the addition of moisture can increase the risk for landslides. Landslide
deposits have been mapped in nearby Garden Gulch, Cascade Canyon, Conn Creek Canyon, and
other unnamed canyons in the area. Nearby landslide deposits can be seen in Figure 3.
3.4 ROCKFALL HAZARD
The Site is not located in a known Rockfall Hazard area. However, cut slopes can expose
potentially unstable jointed bedrock creating rock fall hazards.
3.5 ALLUVIAL FAN HAZARD
The Site is not located in a known Alluvial Fan Hazard area. The Site is located on a topographic
high within a greater plateau.
3.6 SLOPE DEVELOPMENT
The Site will be located on slopes which locally exceed 20% grade. Some of these slopes have
been previously graded, disturbed, and/or reclaimed. No structures or utilities will be
constructed on the Site. It is recommended that the operator follow a Site plan that utilizes
slope stabilization and erosion control techniques. This Site Plan should be generated and
approved by a Colorado Licensed Professional Engineer. Slopes should be carefully monitored
for changes throughout the life of the project. Slopes on and adjacent to the Site can be seen
on Figure 4.
3.7 CORROSIVE OR EXPANSIVE SOILS OR ROCK
The Parachute-Irigul-Rhone association has a moderate corrosiveness rating for steel and a low
corrosiveness rating for concrete per the USDA Natural Resources Conservation Service. The
Northwater-Adel complex has low corrosiveness ratings for both steel and concrete.
According to the USDA Natural Resource Conservation Service, the Parachute-Irigul-Rhone
association and Northwater-Adel complex have values for linear extensibility of 2.5 and 2.0
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respectively. These both fall into the “Low” category of less than 3.0. Therefore, expansive
soils are not anticipated at the Site.
3.8 MUDFLOW OR DEBRIS FLOW HAZARD
The Site is not located in a known Mudflow or Debris Flow Hazard area. The Site is located on a
topographic high within a greater plateau.
3.9 DEVELOPMENT OVER FAULTS AND EARTHQUAKE HAZARDS
The Site is not located above any known mapped faults. The closest faults known to have shown
surface deformation due to large earthquakes in the last 1.6 million years are the Redlands Fault
complex near Grand Junction and the Grand Hogback Fault complex near Glenwood Springs.
The United States Geological Survey ground acceleration maps indicate that there is a two
percent chance in 50 years at the Site for ground acceleration from 0.14-0.2 g. Earthquakes in
Garfield County are likely to measure 5.0 or less on the Richter Scale (Garfield County Hazard
Mitigation Plan, 2017).
The Colorado Geological Survey (USGS) Earthquake Hazards Program online records were
researched for seismic activity dating back to 1867. Twenty-two earthquakes exist in the
dataset for Garfield County. The largest earthquake in the dataset was from the Atomic Energy
Commission Rulison Project nuclear detonation (magnitude 5.3) in 1969. The largest natural
earthquake was a magnitude 4.3 that occurred due south of Glenwood Springs in 1971. Only
one earthquake has occurred within a five-mile radius of the site. This was a magnitude 2.9
that occurred in 2015 and was located 2.47 miles southwest of the Site.
4.0 OTHER GEOLOGIC HAZARDS
4.1 FLOOD HAZARDS
Agency (FEMA) Flood Map Service Center indicates that digital data for the Site is not available.
However, due to the topographic nature of the site, flooding risk associated with streams or rivers
is likely low. Nevertheless, there are numerous instances where heavy precipitation events occur
in very short periods of time from cloud bursts associated with thunderstorms. These episodic
events can result in flash-flooding and can be a regionally-common occurrence. Sheet wash from
these thunderstorms can also be a strong erosive force and recently disturbed ground is
particularly susceptible.
4.2 COLLAPSIBLE SOILS
The Site is not located in a known area with Collapsible Soils. Collapsible soils are generally seen
on alluvial fans in arid areas that have less than 18” of precipitation per year. The Site is in an
area that receives 20-25” of precipitation yearly (OSU Prism Climate Group).
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4.3 MINING ACTIVITIES
Mining activities for uranium, coal, and oil shale have been historically present in the region but
have not been present within the Site area. The Site is located seven miles west-southwest of
the US Naval Oil Shale Reserve. The Exxon Colony Project mine is located approximately 8 miles
northeast of the Site. Subsidence from Mining activities is not anticipated.
4.4 RADIOACTIVE HAZARDS
Review of the Colorado Department of Public Health and Environment website for Radon
information indicates that Garfield County has high radon potential. It is anticipated that based
on the proposed project for the Site, that limited structures and buildings will be developed, and
workers will predominantly be outside during the normal work shifts; therefore, radon is not
expected to represent a significant geologic or worker exposure health hazard.
TENORM (technologically enhanced naturally occurring radioactive material) can sometimes be
found as scale in tanks and pipes that have been used in oilfield operations. Any tanks or pipes
stored on location should be evaluated for TENORM and mitigated.
Naturally occurring radioactive minerals are common Garfield County. However, they are not
anticipated in the geologic section exposed at this Site.
4.5 VOLCANIC HAZARDS
The Dotsero Crater, located approximately 63 miles east-northeast of the Site, is an inactive
volcano and is the most recent documented source of volcanic rocks in Colorado. The USGS lists
the Dotsero Crater threat potential as Moderate. The most recent eruption was approximately
4,150 years ago. No other known volcanic hazards exist in the region.
5.0 CONCLUSIONS AND SUMMARY
The following list presents the conclusions developed for the geological and hydrological hazard
evaluations based upon the findings presented in this report:
1. The Site is underlain by soils derived from weathered bedrock.
2. The Site is not located in a known landslide or rockfall hazard area. However, landslides
and rockfalls are a regionally common occurrence and care should be taken to
appropriately manage slopes and drainage.
3. The Site will be located on slopes which locally exceed 20% grade. It is recommended that
the operator follow a Site plan that has been generated and approved by a Colorado
Licensed Professional Engineer.
4. An onsite evaluation was not performed in this study. However, the topsoil at the Site
was observed to have been removed (graded or stripped off) in aerial photographs.
5. Collapsible soils are generally confined to alluvial fans in arid environments and are not
anticipated at the Site.
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6. Expansive soils are not anticipated at the Site.
7. There is only one Groundwater well within the area. However, groundwater is expected
to be relatively deep at the Site.
8. The Site is not located in within a floodplain. It is recommended that the operator
implement erosional control measures to protect the Site and down-gradient assets from
storm events, sheetwash, and flash flooding.
9. The occurrence of seismic events has been documented in Garfield County and faults
have been mapped north of the Site as well as in other locations throughout the region;
however, these hazards represent a low probability of risk to the proposed development
of the Site.
10. The potential presence of radon presents a low probability of risk to the proposed
development of the Site.
11. Mining activities have historically been conducted in the area (coal, oil shale, and
uranium); however, these historic activities present a low probability of risk to the
proposed development of the Site.
This report is respectfully submitted by Entrada Consulting Group, Inc.
Reed Johnson Kevin J. Taylor, CPG-7805
Senior Project Geologist Senior Geologist
6.0 FIGURE LIST
Figure 1: Geologic Units
Figure 2: NRCS Soils
Figure 3: Landslide Deposits
Figure 4: Slopes in Site Vicinity
7.0 REFERENCES
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Coffin, D.L., Welder, F.A., and Glanzman, R.K., 1971, Geohydrology of the Piceance Creek
Structural Basin Between the White and Colorado Rivers, Northwestern Colorado, U.S.G.S.,
Atlas HA-370, 2 sheets
Hail, W.J., 1982, Preliminary Geologic Map of the Circle Dot Gulch Quadrangle, Garfield
County, Colorado, U.S.G.S., Map MF-1293; scale 1:24,000, 1 map sheet
Hail, W.J., Jr., 1992, U.S.G.S. Bulletin 1787-R, Geology of the Central Roan Plateau
Area, Northwestern, Colorado, 26 p.,
Hail, W.J., O’Sullivan, R.B., Smith, M.C., 1989, U.S.G.S. Miscellaneous Investigations Series,
Map 1-1797-C, Geologic Map of The Roan Plateau Area, Northwestern Colorado, 1 map sheet
Nelson-Moore, J.L., Bishop C.D., and Hornbaker, A.L., 2005, Colorado Geologic
Survey, Bulletin 40, Radioactive Mineral Occurrences of Colorado, 1054 p.
White, J. L., and Greenman, C., 2008, EG-14 Collapsible Soils in Colorado, Colorado
Geological Survey, Department of Natural Resources, 108p, 1 map sheet
Other References:
Colorado Abandoned Mine Land Information Map
https://erams.com/aml
Colorado Department of Public Health and Environment – Radon
https://cdphe.colorado.gov/understanding-radon
Colorado Division of Water Resources
https://dwr.state.co.us/tools/
Colorado Groundwater Atlas – Colorado Geological Survey
https://coloradogeologicalsurvey.org/water/colorado-groundwater-atlas/
FEMA Flood Map Service Center
https://msc.fema.gov/portal/home
Garfield County Land Use and Development Code
https://www.garfield-county.com/community-development/land-use-code/
Garfield County Natural Hazard Mitigation Plan, 2017
https://www.garfield-county.com/emergency-management/natural-hazard-mitigation-plan/
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Oregon State University - Prism Climate Group
https://prism.oregonstate.edu/
USDA Natural Resources Conservation Service, Web Soil Survey
https://websoilsurvey.sc.egov.usda.gov/App/WebSoilSurvey.aspx
USGS Earthquake Hazards Program
https://earthquake.usgs.gov/
USGS Volcano Hazards – Dotsero Volcanic Center
https://www.usgs.gov/volcanoes/dotsero-volcanic-center
Landslides
Complied Landslides from 24K Maps
-Complied Landslides from 48-1 DOK Maps
-Complied Landslides from HB1041 Maps
-Complied Landslides from 250K Maps
Source:lit1ps://cgsarcimage.n1ines.ed11/arc9is/rest/serYices/cgs_services/Colomdo_la11ds/ide_i1111e11to1y_11ew/MapSe1ver
Project No: 020-014
Map By: NOB
Date: 9/2/2020
LANDSLIDE INVENTORY
CC 697-15-54 ANNEX
LARAMIE ENERGY
GARFIELD COUNTY, COLORADO
SWSE SEC 15 T6S R97W
� ENTRADA CONSU T NG GROUP
0 0.5
1 inch= 1 mi
330 Grand Avenue, Unit C
Grand Junction, CO 81501
970-549-1015
mi
Figure
3
Reclamation Status
Parcel Degrees Slope(%) 5-10 15-20 25-30 1111 >40
1111 0-5 10-15 20-25 111130-40
Project No: 020-014 DEGREE SLOPE MAP
CASCADE CREEK 697-15-54 Map By: NOB ANNEX CUTTING FACILITY
LARAMIE ENERGY Date: 11/30/2020 GARFIELD COUNTY, COLORADO
0
� ENTRADA CO N S U T NG GA OU P
1,000 2,000 N
Feet W◊E
1 inch= 1,200 ft
330 Grand Avenue, Unit C Figure
Grand Junction, CO 81501
970-549-10 15 4
LARAMIE ENERGY
CC 697-15-54 ANNEX CUTTINGS FACILITY
IMPACT ANALYSIS: SECTION 9-102-K - SENSITIVE AREAS SURVEY
GARFIELD COUNTY LAND USE AND DEVELOPMENT CODE 2013
Cover photo: View of the existing CC 697-15-54 well pad.
Prepared for:
Laramie Energy
Denver, CO
Prepared by:
WestWater Engineering, Inc.
2516 Foresight Cr. #1
Grand Junction, CO 81505
Leah Weckworth, Environmental Scientist/Project Manager
October 2020
WestWater Engineering Page 1 of 18 October 2020
INTRODUCTION
Project Description
At the request of Laramie Energy (Laramie), WestWater Engineering (WestWater) has prepared a
sensitive areas survey report for the proposed CC 697-15-54 Annex Cuttings Facility that would be
located on privately owned lands in Garfield County, Colorado. This document reports the results and
analysis of the findings that are pertinent to Section 9-102-K of the Garfield County Land Use and
Development Code (as amended) as it applies to this project.
Laramie proposes to re-disturb the reclaimed CC 697-15-54 Annex Pad and utilize a portion of the
existing CC 697-15-54 pad in Section 15, Township 6 South, Range 97 West in order to construct a new
cuttings management facility for cuttings from wells drilled on nearby well pads (Figure 1). This project
will occur entirely on an existing disturbance area, and no new disturbance would occur as a result of this
project. This Sensitive Areas Report applies to the area disturbed for the cuttings facility. The current
land uses include rangeland, wildlife habitat, and oil and gas development.
Survey Methods
WestWater biologists surveyed the proposed cuttings facility for the potential occurrence of special status
plants and wildlife (including federally threatened and endangered species), raptors, noxious weeds, and
potential Army Corps of Engineers (COE) jurisdictional Waters of the U.S. (WoUS) on September 22nd,
2020. The surveys were completed late in the growing season for plants but outside the nesting season for
migratory birds (including raptor species); however, raptor nest vacancy status for 2020 was determined
based on evidence of use (i.e. feathers, whitewash, greenery).
Vegetation types were determined through aerial photography and on-the-ground assessments. Plant
species identification was aided by using pertinent published field guides (Ackerfield, 2015, Spackman et
al. 1997, Kershaw et al. 1998, Whitson et al. 2001, CWMA 2007, Weber and Wittmann 2012). Mapped
soil types, as published by the Natural Resources Conservation Service (NRCS), U.S. Department of
Agriculture (USDA), were reviewed to determine the soil types and expected natural vegetation
characteristics at the project site (NRCS 2020). Data locations were recorded using handheld Global
Positioning System (GPS) units (Datum: NAD83, Zone 12) and photographs were taken of the habitat,
terrain, and biological features found during the survey.
Threatened and endangered wildlife surveys and raptor nest surveys were conducted in suitable habitats
within 0.25 mile of project features. Biologists selected pedestrian routes that would ensure adequate
coverage of all suitable potential raptor nest trees. Woodland nesting habitat was surveyed at
approximately 50-meter intervals while visually inspecting trees for nests. WestWater biologists also
searched for raptor nest sites along cliffs within 0.5 mile of project features. Noxious weed infestations
within 30 meters of project features were documented and are reported in a weed management plan that
has been prepared for this project (WestWater 2020).
SECTION 9-102-K – SENSITIVE AREAS
Vegetation
There are three main vegetation community types present surrounding the project area: mountain
shrublands, sagebrush shrublands, and aspen woodlands. The mountain shrublands are composed
primarily of Utah serviceberry (Amelanchier utahensis) intermixed with mountain snowberry
(Symphoricarpos oreophilus), Gambel oak (Quercus gambelii), and mountain big sagebrush (Artemisia
tridentata ssp. wyomingensis). Sagebrush shrublands are composed primarily of Mountain sagebrush and
mountain snowberry with an understory of native perennial grasses and forbs. North-facing slopes in the
surrounding area support patchy aspen woodlands composed of quaking aspen (Populus tremuloides),
WestWater Engineering Page 2 of 18 October 2020
mountain snowberry, and chokecherry (Prunus virginiana). Common plants observed throughout the
survey area are described in Table 1.
Table 1. Common plants observed throughout the survey area.
Common Name Scientific Name Abundance* Habitat Type
Grasses and Grass-like plants
Intermediate
wheatgrass Thinopyrum intermedium xxx Reclaimed/disturbed area
Kentucky bluegrass Poa pratensis xx Mountain shrub, aspen
woodland
Muttongrass Poa fendleriana xx Mountain shrub, sagebrush
shrubland, aspen woodland
Sandberg bluegrass Poa secunda xx Mountain shrub, sagebrush
shrubland, aspen woodland
Slender Wheatgrass Elymus trachycaulus xx Reclaimed/disturbed area
Smooth Brome Bromus inermis xxx Reclaimed/disturbed area
Tall Wheatgrass Thynopyrum ponticum xx Reclaimed/disturbed area
Forbs
American vetch Vicia americana xxx Mountain shrub, sagebrush
shrubland
Arrowleaf
balsamroot Balsamorhiza sagitta x Mountain shrub, sagebrush
shrubland, aspen woodland
Badlands mule-ears Scabrethia scabra xxx Mountain shrub, sagebrush
shrublands
Bluntseed sweetroot Osmorhiza depauperata xxx Mountain shrub, aspen
woodland
Canadian white
violet Viola canadensis xxx Aspen woodland
Common dandelion Taraxacum officinale xx Mountain shrub, sagebrush
shrublands, aspen woodland
Common yarrow Achillea millefolium xxx
Reclaimed/disturbed area,
mountain shrub, aspen
woodland
Lambstongue
ragwort Senecio integerrimus xxx Mountain shrub, sagebrush
shrublands
Larkspur Delphinium sp. xxx Mountain shrub, aspen
woodland
WestWater Engineering Page 3 of 18 October 2020
Table 1. Common plants observed throughout the survey area.
Common Name Scientific Name Abundance* Habitat Type
Silvery lupine Lupinus argenteus xxx
Mountain shrub, aspen
woodland, sagebrush
shrublands
Stinging nettle Urtica dioica xx Mountain shrub, aspen
woodland
Western valerian Valeriana occidentalis xxx Mountain shrub
Woods’ Rose Rosa woodsii xxx Mountain shrub, aspen
woodland
Shrubs/Trees
Chokecherry Prunus virginiana xx Mountain shrub, aspen
woodland
Gambel’s oak Quercus gambelii xx Mountain shrub
Mountain
mahogany Cercocarpus montanus xxx Mountain shrub
Mountain
snowberry
Symphoricarpos
oreophilus xxx Mountain shrub, sagebrush
shrublands
Quaking aspen Populus tremuloides xxx Mountain shrub, aspen
woodland
Rocky mountain
maple Acer glabrum xx Mountain shrub, aspen
woodland
Rubber rabbitbrush Ericameria nauseosa x Reclaimed/disturbed area,
mountain shrub
Utah serviceberry Amelanchier utahensis xxx Mountain shrub
Mountain sagebrush Artemisa tridentata ssp.
vaseyana x Mountain shrub, sagebrush
shrublands
Yellow rabbitbrush Chrysothamnus
viscidiflorus x Mountain shrub, sagebrush
shrublands
* x= uncommon in project area.
xx= moderate frequency throughout project area.
xxx = common frequency throughout project area.
Threatened, Endangered, and Candidate Plant Species
No federally listed threatened, endangered, or candidate species of plants were detected during the survey
and none (Table 2, Figure 2) are expected to be affected by the project (USFWS 2020a). A review of the
available literature, evaluation of soils and terrain at project site, and previous WestWater surveys
indicated that no known populations of these plants exist nearby.
WestWater Engineering Page 4 of 18 October 2020
Table 2. Federally listed threatened, endangered, and candidate plant species for Garfield
County.
Common Name Scientific Name Status
Colorado hookless cactus Sclerocactus glaucus Threatened
DeBeque phacelia Phacelia submutica Threatened
Parachute penstemon Penstemon debilis Threatened
Ute ladies’-tresses orchid Spiranthes diluvialis Threatened
The proposed project is located approximately 6 miles from mapped critical habitat for Parachute
penstemon and 7.8 miles from DeBeque phacelia critical habitat. The nearest known occupied habitat for
Ute ladies’-tresses orchid is located on the Roaring Fork River near Carbondale. There is also no suitable
habitat within the project area for Colorado hookless cactus.
Noxious Weeds
Weed species listed by the State of Colorado (2005) detected in the project area include common mullein
(Verbascum thapsus) and houndstongue (Cynoglossum officinale). Detailed noxious weed infestation
information, general control techniques, and revegetation recommendations are reported in the
accompanying weed management plan prepared for this project (WestWater 2020).
Mitigation and Minimizing Impacts
The cuttings facility would be constructed within an existing disturbance where native vegetation was
cleared for construction of the CC 697-15-54 Annex Pad prior to reclamation of the pad. This strategy
will serve to reduce cumulative loss and fragmentation of native vegetation and is a good mitigation
technique. The best method to mitigate the loss of native vegetation is by reclaiming and reseeding the
disturbance area with a native seed mix. Revegetation with native species provides the greatest benefit for
wildlife. A reclamation and weed management plan has been developed for this project (WestWater
2020), which includes recommendations for vegetation management applicable to this project.
Threatened, Endangered, and Candidate Wildlife Species
Federally listed threatened, endangered and candidate wildlife species with potential to occur in the
project area are listed in Table 3 (USFWS 2020a and USFWS 1994).
Table 3. Federally listed threatened, endangered, and candidate wildlife species for Garfield
County.
Common Name Scientific Name Status
Bonytail Gila elegans Endangered
Canada lunx Lynx canadensis Threatened
Colorado pikeminnow Ptychocheilus lucius Endangered
Greenback cutthroat trout* Oncorhynchus clarki stomias Threatened
Humpback chub Gila cypha Endangered
Mexican spotted owl Strix occidentalis lucida Threatened
WestWater Engineering Page 5 of 18 October 2020
Table 3. Federally listed threatened, endangered, and candidate wildlife species for Garfield
County.
Common Name Scientific Name Status
Razorback sucker Xyrauchen texanus Endangered
Yellow-billed cuckoo Coccyzus americanus Candidate
* Recent genetic studies indicate that pure greenback cutthroat trout likely do not exist in western Colorado. Until
the review and rulemaking process is complete, the U.S. Fish and Wildlife Service is recommending that
“Lineage GB” cutthroat trout be managed as greenback cutthroat (USFWS 2012)
Habitat conditions within the surveyed area are not appropriate for any of the species listed in Table 3.
There is no suitable habitat present in the project area or immediately downstream to support greenback
cutthroat trout. The project area drains to the Colorado River within or above designated critical habitat
for Colorado pikeminnow, razorback sucker, bonytail, and humpback chub. Increased sedimentation,
introduction of pollutants, or water depletions could affect critical aquatic habitats downstream.
Recommendations
Implementation of a Spill Prevention, Control, and Countermeasure Plan (SPCC), a Stormwater
Management Plan (SWMP), and Best Management Practices (BMPs) associated with this type of project
will provide a good degree of mitigation for any potential impacts to critical habitat for the Colorado
River endangered fishes located downstream of the project area.
Raptors
Several raptor species could nest in the project area (Table 4). Nesting season for raptor species in this
area begins in January for eagles and continues through mid-August for some hawks. The most common
raptor species observed in the area include American Kestrel, Cooper’s Hawk, Great Horned Owl, and
Red-tailed Hawk.
Table 4. Raptor species that may be present near the project area.
Common Name Scientific Name BCC*
American Kestrel Falco sparverius No
Cooper’s Hawk Accipiter cooperii No
Flammulated Owl Otus flammeolus Yes
Golden Eagle Aquila chrysaetos Yes
Great Horned Owl Bubo virginianus No
Long-eared Owl Asio otus No
Northern Goshawk§ Accipiter gentilis Yes
Northern Harrier Circus cyaneus No
Northern Pygmy Owl Glaucidium gnoma No
Northern Saw-whet Owl Aegolius acadicus No
Peregrine Falcon Falco peregrinus Yes
Prairie Falcon Falco mexicanus Yes
WestWater Engineering Page 6 of 18 October 2020
Table 4. Raptor species that may be present near the project area.
Common Name Scientific Name BCC*
Red-tailed Hawk Buteo jamaicensis No
Sharp-shinned Hawk Accipiter striatus No
Swainson’s Hawk Buteo swainsoni No
*BCC=U.S. Fish and Wildlife Service, Bird of Conservation Concern (USFWS 2008)
Three raptor nests were observed in the project area (Figure 3). One previously known nest within the
survey area was searched for but not found. Due to the timing of the surveys, nest occupancy was
determined based on evidence present at the nest site (i.e. feathers, white wash, pellets, etc.). Raptor nests
observed in the project area and the distance from the footprint of the proposed facility to the nest are
described in Table 5. No nests would be directly removed by the proposed project.
Table 5. Raptor nest distance to project features.
Map Label Species Common Name Vacancy Distance to Cuttings Facility
Footprint (meters)
AMKE-1 American Kestrel Unoccupied 358
RTHA-1 Red-tailed Hawk Unoccupied 296
RTHA-2 Red-tailed Hawk Unoccupied 435
RTHA-3 Red-tailed Hawk Not Found 349
Long-term impacts resulting from project development would be unlikely because no nests are directly
affected and the proposed facility would not disturb native hunting and foraging habitat. The proposed
project would not directly impact nesting raptors; however, indirect effects could occur if construction,
operation or reclamation of the facility takes place near nests during the active nesting season if no
topographical or vegetative screen exists. Project activity has the potential to impact nesting raptors
within 0.25 and 0.5 miles of project features through disruption of nesting and brood rearing activities due
to the presence of human activity.
Recommendations
If project construction is planned to occur during the nesting season, it is recommeneded that raptor nest
status checks are completed during the nesting season to determine nest occupancy status prior to
initiation of project construction. In cases where raptor nests exist near a project and no mitigating factors
are present, every effort should be made to apply timing and buffer distance limitations to reduce indirect
effects (Table 6). These recommendations are based on Colorado Parks and Wildlife (CPW)
recommendations (Craig 2002, Klute 2008) and literature review of nesting season timing for raptors in
the region (Andrews and Righter 1992, Poole 2020, Righter et. al. 2004).
WestWater Engineering Page 7 of 18 October 2020
Table 6. Timing and buffer recommendations for occupied raptor nests.
Species Buffer Zone Seasonal Restriction
American Kestrel * *
Bald Eagle 0.50 mile 15 October – 31 July
Burrowing Owl 660 feet 15 March – 31 August
Cooper’s Hawk 0.25 mile 1 April – 15 August
Ferruginous Hawk 0.50 mile 1 Feb – 15 July
Flammulated Owl 0.25 mile 1 April – 1 August
Golden Eagle 0.50 mile 15 December – 15 July
Great Horned Owl * *
Long-eared Owl 0.25 mile 1 March – 15 July
Northern Goshawk 0.50 mile 1 March – 15 September
Northern Harrier 0.25 mile 1 April – 15 August
Northern Pygmy Owl 0.25 mile 1 March – 15 July
Northern Saw-whet Owl 0.25 mile 1 March – 15 July
Osprey 0.25 mile 15 March – 15 August
Peregrine Falcon 0.5 mile 15 March – 31 July
Prairie Falcon 0.5 mile 15 March – 15 July
Red-tailed Hawk 0.33 mile 15 February - 15 July
Sharp-shinned Hawk 0.25 mile 1 April – 15 August
Swainson's Hawk 0.25 mile 1 April - 31 July
* Great Horned Owls and Kestrels are relatively tolerant of human activity. Keep activity to a
minimum during breeding season.
Greater Sage-grouse
The proposed cuttings facility would be located outside of priority and general habitat management areas,
as mapped by CPW (CPW 2020) (Figure 4). Sage-grouse found in the Piceance Basin typically use broad
continuous ridges dominated by Wyoming and mountain sagebrush shrublands with greater than 20%
canopy cover of sagebrush (GrSG Steering Committee 2008). WestWater biologists searched for grouse
and grouse sign (i.e. cecal and fecal pellets, feathers, etc.) within 30 meters of the proposed footprint of
the facility. No grouse or sign were observed during surveys.
Recommendations
Because the proposed project site would be located outside of mapped priority and general habitat
management areas, and because the nearest known active sage-grouse lek site is located over 3.5 miles to
the northeast, the construction and operation of the cuttings facility is not expected to result in impacts to
Greater Sage-grouse.
WestWater Engineering Page 8 of 18 October 2020
Birds of Conservation Concern, Migratory, and Non-migratory Birds (other than raptors)
WestWater biologists evaluated habitat in the project area for bird species that could be affected by the
project. Birds of Conservation Concern (BCC) (USFWS 2008) have been identified by the U.S. Fish and
Wildlife Service (USFWS) for priority conservation management in an attempt to prevent or remove the
need to list additional species under the Endangered Species Act (USFWS 2020b). The survey was
conducted after the nesting season for neo-tropical migrant bird species; therefore, a thorough literature
review was conducted to identify BCC species with potential to occur in the project area (Table 7)
(Andrews & Righter 1992, Wickersham 2016, Righter et al 2004, Poole 2020).
Table 7. BCC Species that may occur in the project area.
Common Name Scientific Name Status Habitat Description Potential to Occur
Brewer’s Sparrow Spizella breweri BCC
Expansive sagebrush
shrublands; occasionally
found in greasewood or other
shrublands
Likely to occur in
sagebrush shrublands
present in the project
area.
Cassin’s Finch Carpodacus
cassinii BCC
Nests in conifer forests and
may occur in pinyon/juniper
woodlands, cottonwood
stands, and aspen groves.
Potential to occur in the
aspen forests present in
the project area.
Suitable nesting habitat for migratory bird species, including BCC species, would not be directly affected
by the project. Most non-game bird species and their active nests are protected under the Migratory Bird
Treaty Act (16 U.S.C. 703-712; Ch. 128; July 13, 1918; 40 Stat. 755) and destruction of occupied nests
could be considered a “take” resulting in a violation.
Recommendations
U.S. Fish and Wildlife Service guidance indicates that developments can affect nesting migratory birds
within 100-feet of a project and indirect effects related to the project could include the disruption of
nesting and brood rearing activities if project construction occurs during the nesting season.
To reduce negative effects, vegetation removal should occur outside of the nesting season, which is
generally considered to occur between May 15 and July 15 for the species in this area. If vegetation
clearing occurs prior to or after nesting season, affected birds will relocate to alternate sites. Reducing the
amount of vegetation removed would also help mitigate effects of lost nesting habitat.
American Elk and Mule Deer
The project area would be located within elk winter range, but outside of severe winter range, winter
concentration area, and production area (Figure 5). The project area is located outside of any sensitive
habitats for mule deer (CPW 2020a). Because the facility would be constructed within a previous
disturbance, no direct loss of elk and mule deer habitat would occur. The proposed facility is adjacent to
an existing well pad, pipeline right-of-way (ROW), and access road, and would be in the vicinity of well
pad locations and other oil and gas infrastructure. Because of these existing landscape modifications and
human activity, the effects of additional activity at the previously disturbed facility site are likely to be
small and temporary. The project would not further fragment habitat, and deer and elk populations have
become somewhat habituated to human activity in the area and indirect impacts from construction of this
project would be low. Vehicle related mortality attributable to this project is unlikely given the current
traffic volumes and generally low speed limits on the existing roads.
WestWater Engineering Page 9 of 18 October 2020
Recommendations
Fencing the proposed facility to exclude wildlife should not be necessary since the access road into the
cuttings trench will provide an adequate escape route. Additionally, no liquids or hazardous materials that
pose an inherent threat to wildlife will be present at the proposed facility. No other recommendations
with respect to wildlife are offered.
Black Bear and Mountain Lion
CPW mapping shows the site to be within overall ranges for black bear and mountain lion (CPW 2020a).
Affects to mountain lion are unlikely. Potential bear encounters could occur if garbage or food is not
properly managed during construction. Interactions with humans sometimes result in the euthanasia of
offending bears by the CPW and would be the most conceivable potential impact on either species.
Recommendations
All garbage and food items should be stored in bear-proof receptacles and/or removed from the site on a
daily basis to prevent attracting bears to the site.
Small Mammals
Common small mammal species in the project area include coyote (Canis latrans) and cottontail
(Sylvilagus spp.). Northern pocket gophers (Thamomys talpoides) are known to occur in the area and a
multitude of additional rodent species may occur (Fitzgerald et. al. 2011). Townsend’s big-eared bat
(State species of concern – Corynorhinus townsendii pallescens), fringed myotis (Myotis thysanoides),
and several other bat species may occupy the area seasonally, but no bats were observed. Due to the
abundance of available habitat surrounding the project area for these species it is unlikely that the
proposed project would have detrimental impacts that would result in effects to the populations of these
species.
Reptiles
Midget faded rattlesnake (State species of concern – Crotalus viridis concolor) has potential to occur in
the project area (CPW 2019b). Other species of reptiles within the project area may include western
terrestrial garter snake (Thamnophis elegans), gopher (bull) snake (Pituophis catenifer sayi), side-
blotched lizard (Uta stansburiana), plateau striped whiptail (Cnemidophorus velox), sagebrush lizard
(Sceloporus graciosus), tree lizard (Urosaurus ornatus), and western whiptail (Cnemidophorus tigris),
among others (Hammerson 1999). Due to the abundance of available habitat surrounding the project area
for these species it is unlikely that the proposed project would have detrimental impacts that would result
in effects to the populations of these species.
Aquatic Species
No aquatic features that provide suitable habitat for fish were observed in the project area. There is
potential for several species of amphibians including those listed by the CPW as species of concern to
occur in the project area along permanent and temporary water sources. Species with potential to occur
include: Northern leopard frog (State species of concern - Rana pipiens), Great Basin spadefoot (Spea
intermontana), and tiger salamander (Ambystoma tigrinum) (Hammerson 1999 and CPW 2020b). There
is potential that aquatic wildlife downstream could be affected by increased sedimentation and potential
spills from chemicals stored on site during construction of the facility.
Recommendations
Implementation of a Spill Prevention, Control, and Countermeasure (SPCC) Plan, a Stormwater
Management Plan (SWMP), and Best Management Practices (BMPs) associated with this type of project
WestWater Engineering Page 10 of 18 October 2020
will provide a good degree of mitigation for any potential impacts to critical habitat for the Colorado
River endangered fishes located downstream of the project area.
Waters of the U.S.
Waters of the U.S. include wetlands and drainages under the jurisdiction of the U.S. Army Corps of
Engineers. Perennial, intermittent, and ephemeral streams and drainages, as indicated on U.S. Geological
Survey mapping, are considered WoUS if they exhibit evidence of flow (i.e. ordinary high water mark)
and are hydrologically connected to a perennial stream. In addition to hydrology, a jurisdictional wetland
will also demonstrate the unique soil and vegetation characteristics that result from inundation or
saturation.
WestWater biologists surveyed the area for aquatic resources including wetlands and waters of the U.S.
(WoUS) that would fall under the jurisdiction of the COE in conjunction with other surveys that were
conducted for this report. No potential WoUS locations were identified within the area of proposed
disturbance.
Recommendations
It is recommended that the COE is notified if dredging or discharges of fill material in any WoUS would
occur, in order to maintain compliance with the Clean Water Act. To protect the integrity of
ephemeral/intermittent streams, precautions should be taken when crossing or intersecting the waterways
identified. Best Management Practices (BMPs), including adequate barriers and filtration methods,
should be used to prevent soil erosion and sedimentation to downstream waterways.
WestWater Engineering Page 11 of 18 October 2020
SUMMARY OF EFFECTS AND RECOMMENDATIONS
Native vegetation: Vegetation within previously disturbed project footprint is composed of a mix of
native and non-native species, including some noxious and nuisance species. Once the project area is
ready for final reclamation, reseeding with native grasses, forbs, and shrubs would be beneficial and with
implementation of an active weed management plan, vegetation conditions at the site may be improved
over present conditions.
T&E plants: No threatened or endangered species of plants would be affected by the project.
Noxious Weeds: Several noxious weed species listed by the State of Colorado and Garfield County were
present in the project area. Infestation locations, general control techniques, and revegetation
recommendations are reported in a Weed Management Plan that was prepared for this project (WestWater
2020).
T&E wildlife: The project area drains to the Colorado River which provides Critical Habitat for four
species of endangered fish. Sedimentation, pollution, or water depletions may have an indirect effect on
these species if they occur. It is recommended that a stormwater control plan and spill prevention, control
and counter measure plan are implemented to prevent increased sedimentation and spills from reaching
downstream waterways.
Forage and cover for wildlife and habitat fragmentation: The long-term effects of vegetation removal
necessary for the project are likely to be minimal once revegetation and reclamation have occurred. The
site is adjacent to existing disturbances and would not further fragment existing habitat. Suitable nesting
habitat for birds would not be directly affected by the project.
Big game migration corridors: No migration corridors would be affected. Big game species are not
restricted to specific movement corridors in this area and the presence of this facility will not create a
barrier. Fencing is not recommended for this site. If it is deemed necessary, fencing could alter daily big
game movements on a small scale and could pose a hazard to animals if not built with wildlife in mind.
Elk and mule deer winter range: A portion of the project takes place within an elk winter range.
Minimize activity and disturbance in big game winter ranges during winter months (December - April).
Direct affects from construction and operation: Vehicle related mortality connected to this project is
expected to be low. In order to reduce project construction related affects to nesting birds it is
recommended that brush clearing and grubbing activities occurs outside the nesting season for migratory
birds and sage-grouse (March 15 through July 15).
Indirect effects from construction and operation: Wildlife in the project area has become somewhat
habituated to human activity and indirect impacts from construction of this project would be low.
Increased sedimentation and the potential for chemical spills to reach downstream waterways would be
mitigated with the implementation of a stormwater management plan and spill prevention, control, and
counter-measure plan. The presence of construction personnel and noise has a low potential to affect
wildlife in a negative manner, since the construction activities would be short in duration, occur during
daylight hours, and occur adjacent to and within an area of current human activity.
WestWater Engineering Page 12 of 18 October 2020
REFERENCES
Ackerfield, J. 2015. Flora of Colorado. Botanical Research Institute of Texas, Fort Worth, Texas.
Andrews, R., and R. Righter. 1992. Colorado Birds: A Reference to Their Distribution and Habitat.
Denver Museum of Natural History. Denver.
CPW. 2020a. CPW All Species Activity Mapping Data available online at:
http://www.arcgis.com/home/item.html?id=190573c5aba643a0bc058e6f7f0510b7. Colorado
Parks and Wildlife.
CPW. 2020b. State of Colorado species of concern list. Available online:
http://wildlife.state.co.us/WildlifeSpecies/SpeciesOfConcern/Pages/SpeciesOfConcern1.aspx
Craig, G. R. 2002. Recommended Buffer Zones and Seasonal Restrictions for Colorado Raptors.
Colorado Division of Wildlife, Denver.
CWMA. 2007. S. Anthony, T. D’Amato, A. Doran, S. Elzinga, J. Powell, I. Schonle, K. Uhing. Noxious
Weeds of Colorado, Ninth Edition. Colorado Weed Management Association, Centennial.
Fitzgerald, J.P., C.A. Meaney and D.M. Armstrong. 2011. Mammals of Colorado, Denver Museum of
Natural History and University Press of Colorado, Denver.
GrSG Steering Committee. 2008. Colorado Greater Sage-grouse Conservation Plan, January 2008.
Colorado Division of Wildlife, Denver, CO.
Hammerson, G. A. 1999. Amphibians and Reptiles in Colorado, Second Edition. Colorado
Division of Wildlife, Denver.
Kershaw, L., A. MacKinnon, and J. Pojar. 1998. Plants of the Rocky Mountains. Lone Pine Publishing,
Auburn, Washington.
Klute, D. 2008. Recommended Buffer Zones and Seasonal Restrictions for Colorado Raptors. Colorado
Division of Wildlife, Denver.
NRCS. 2020. Web Soil Survey, U.S. Department of Agriculture, Natural Resource Conservation Service,
Available online: http://websoilsurvey.nrcs.usda.gov.
Poole, A. (editor). 2020. The Birds of North America Online: http://bna.birds.cornell.edu/BNA/.
Cornell Laboratory of Ornithology, Ithaca, New York.
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Country. Grand Valley Audubon Society, Grand Junction.
Spackman, S., B. Jennings, J. Coles, C. Dawson, M. Minton, A. Kratz, and C. Spurrier. 1997. Colorado
Rare Plant Field Guide. Prepared for the Bureau of Land Management, the U.S. Forest Service,
and U.S. Fish and Wildlife Service by the Colorado Natural Heritage Program.
State of Colorado. 2005. Rules pertaining to the administration and enforcement of the Colorado Noxious
Weed Act, 35-5-1-119, C.R.S. 2003. Department of Agriculture, Plant Industry Division, Denver,
78 p.
USFWS. 1994. Determination of Critical Habitat for the Colorado River Endangered fishes: Razorback
sucker, Colorado squawfish, humpback chub, and bonytail chub. Federal Register Vol. 59. No.
54. Monday March 21, 1994 – Rules and Regulations.
USFWS. 2008. Birds of Conservation Concern 2008. U.S. Fish and Wildlife Service, Division of
Migratory Bird Management, U.S. Fish and Wildlife Service, Arlington, Virginia.
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USFWS. 2012. Updated position paper on ESA consultations on greenback cutthroat trout, including the
cutthroat trout referred to as Lineage GB. Updated Oct 4, 2012.
USFWS. 2020a. U.S. Fish and Wildlife Service Information for Planning and Consultation. Available
online at: https://ecos.fws.gov/ipac/location/IPG2GNNTSBCHPEGRT4WJOR3Z3Y/resources
USFWS. 2020b. Endangered Species Act of 1973 (16 USC 1531 et seq.). Available online:
http://www.fws.gov/endangered/laws-policies/esa.html
Weber, W. A., and R. C. Wittmann. 2012. Colorado Flora, Western Slope. Fourth Edition, University
Press of Colorado, Boulder.
WestWater. 2020. Laramie Energy, CC 697-15-54 Reclamation and Weed Management Plan. WestWater
Engineering, Grand Junction, CO.
Whitson, T. D. (editor), L. C. Burrill, S. A. Dewey, D. W. Cudney, B. E. Nelson, R. D. Lee and R. Parker.
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Wickersham, L.E. 2016. The Second Colorado Breeding Bird Atlas. Colorado Bird Atlas
Partnership, Colorado Parks and Wildlife, Denver, CO.
WestWater Engineering Page 1 of 18 October 2020
Annex Cuttings Facility
Traffic Summary
PREPARED FOR:
Laramie Energy, LLC
769 Horizon Drive, Suite 101
Grand Junction, CO 81506
PREPARED BY:
Entrada Consulting Group
330 Grand Avenue, Suite C
Grand Junction, CO 81501
October 2020
INTRODUCTION The following section addresses the requirements for the Traffic Study under Article 4 Section 203.L. of the Garfield County Land Use and Development Code (LUDC). The proposed Annex CuttingFacility will result in a reduction of vehicles accessing county and public roads; therefore, a waiverhas been requested for Article 4 Section 203.L.1.c. Study Preparation.The Basic Traffic Analysis summarizes findings of a traffic impact analysis performed for the Laramie Energy, LLC (Laramie) proposed Annex Cutting Facility (AFC) Centralized E & P Waste Management Facility. The subject facility will treat drill cuttings from three future well pad locations situated within Laramie’s Cascade Creek field. The facility will only manage the treatment and beneficial reuse of cuttings generated by Laramie’s drilling activities and will not provide services to third parties. The site is currently constructed as a well pad. Laramie is requesting a Land Use Change Permit from Garfield County and a Form 28 Centralized E & P Waste Management Facility from Colorado Oil and Gas Conservation Commission (COGCC). It is expected that the lifespan of the site will be approximately 3-5 years, depending on drilling schedule. The site is located on Parcel #216921400026 within Garfield County, Colorado. The parcel is located approximately 12 travel miles north of the DeBeque interchange (MP 61.6) along Interstate 70 (I-70). The site is located approximately 16 miles northeast of DeBeque, Colorado and 21.8 miles northeast by access route. The facility is located in the Southeast ¼ of Section 15, Township 6 South, Range 97 West of the 6th Principal Meridian in unincorporated Garfield County. The subject site encompasses approximately 7.328 acres on a 10,100 -acre parcel. The property is owned by and the facility is operated by Laramie. Laramie is currently planning on drilling at three new well pad locations in the Cascade Creek operating field in 2021 and 2022. The proposed ACF will reduce the cumulative impacts of these well pads by providing drill cutting treatment in the field and reducing the need for semitrucks to haul drilling cuttings by way of public roadways for final disposal at a landfill. The objective of the traffic analysis is to provide traffic projections for the facility.
•Vicinity Map – Attachment 1
•Location Map – Attachment 2
•Public Access Route – Attachment 3
•ACF Route Via Laramie Private Access Roads – Attachment 4
•Hauling Route – Attachment 5
•Garfield County Traffic County Study – Attachment 6
EXISTING ROAD NETWORK Regional trips to this facility will use the I-70 exit at DeBeque, Colorado. Vehicles traveling to the site will drive north through the Town of DeBeque and on Mesa County 45 Road (Roan Creek Road) for approximately 3.75 miles until the road crosses the Garfield/Mesa County Line where the road transitions to Garfield County Road (CR) 204. Approximately 4.25 miles north of the county line, vehicles will turn right onto CR 213 (Conn Creek Road) and travel approximately 4 miles to the end of the county road. From this point travel is on a private road for approximately 9.2 miles to the facility. This private road is located on property owned by Laramie.
Both CR 204 and CR 213 are preferred haul routes according to the Garfield County Road and Bridge Department. Both of these roads are generally used for access to ranches and agricultural operations, rural residential uses, oil and gas operations and access to public lands managed by the BLM. According to the Garfield County Road and Bridge Department Director, Wyatt Keesbury, County Road 204 (Roan Creek Road) is a two-lane asphalt roadway with graveled shoulders in good condition. The posted speed limit is 45 m.p.h. Garfield County Road & Bridge conducted a county-wide traffic study where daily traffic was counted for county roads in 2014 and 2019. The 2014 traffic count study was conducted in July and concluded that the average daily traffic (ADT) was 285 vehicles per day (vpd) on CR 204 at that time. The 2019 traffic county was conducted in August and concluded that the average daily traffic (ADT) was 310 vehicles per day (vpd) on CR 204 at that time. According to the Garfield County Road and Bridge Department Director, Wyatt Keesbury, CR 213 is is a two-lane gravel road with drainage ditches in good condition. The Garfield County Road & Bridge Department has provided data that was collected on County Road 213 (Conn Creek Road) during the July 2014 traffic study. This data indicates that CR 213 had an average of 194 vpd at that time. The 2019 traffic study, conducted in August, concluded that CR 213 had an average of 144 vpd at that time. The studies suggest a decrease in average daily vehicles CR 213 between 2014 to 2019. Background traffic volume counts from 2014 and 2019 are shown in Table 1 below. Calculations for CR 204 road projections for 2021 are based on the vehicles vpd increase from 2014 to 2019 of 5 vpd per year. Laramie estimates that oil and gas activities have reduced from 2019. As a result, 2021 traffic volumes along CR 213 are estimated to be no greater than the 2019 volumes.
Table 1: Garfield County Traffic Count Studies – Average Daily County (ADC)
County Road Road Name 2014 ADC
Actual
2019 ADC
Actual
2020 ADC
Estimated CR 204 Roan Creek Road 285 310 320 CR 213 Coon Creek Road 194 144 144
TRIP GENERATION AND DISTRIBUTION
The Applicant/Operator reviewed and analyzed vehicles necessary for activities and operations for the proposed site. Operations will be conducted in 4 stages at the ACF: initial grading activities, delivery of dried drill cuttings, treatment of drill cuttings, and final grading/reclamation of the site. Stages may occur simultaneously at the site but in different areas. Based on previous transportation and treatment of drill cuttings, Laramie provided the number of trips that will be generated by utilizing the ACF. The ACF operations will not require vehicles to access the site daily. Vehicles will access the site during grading, transportation, and treatment activities. Sampling and inspection (stormwater, noxious weeds, housekeeping) activities will be conducted by personnel performing similar activities at other facilities in the field, so these trips would currently be accounted for within the background traffic volume.
Initial Grading Activities The existing site will be graded for the development of a treatment facility for drill cuttings. Vehicle activities during initial grading activities will consist of (3) pickup trucks per day and one (1) mobilization of excavation equipment. The excavator will be mobilized to the site and remain on-site until initial grading, transportation, and treatment activities are completed. Initial grading activities will take up to 10 days to completed.
Transportation Activities Transportation activities (hauling of dried drill cuttings) will occur in 10 phases. Each phase will transport approximately 2,000 cubic yards of dried untreated drill cuttings from a source well pad to the ACF. Drill cuttings will not be transported on public roads and will remain on Laramie’s private property and access roads. Two – three (2-3) off-road haul trucks will be utilized, each with an approximate capacity of 23 cubic yards. This will result in each transportation phase taking 3-5 days to complete delivery to the ACF. Therefore, during the lifespan of the ACF the total amount of cuttings transportation days will be 30-50 days. Drivetime (including loading and unloading of the cuttings) from the well pad to the proposed ACF is estimated at 30 minutes. Approximately 920-1380 cubic yards of untreated cuttings could be transported in a 10-hour workday. Currently, off-road haul trucks are operating within Laramie’s Cascade Creek field. Laramie anticipates these haul trucks will remain in the Cascade Creek field for various oil and gas operations and mobilization will not be required. In addition to the delivery off-road haul trucks, vehicle activities during transportation activities will consist of (2) pickup trucks per day.
Treatment Activities Vehicle activities during treatment activities will consist of five (5) pickup truck trips monthly to the site. Treatment activities will occur over a period of time, last approximately 2 years. Laramie does not anticipate active treatment during winter months.
Reclamation/ Final Grading Activities Reclamation and final grading/contouring activities may coincide with treatment activities. As cell phases of treated drill cuttings meet COGCC analytical standards, the cells will be graded. During periods final grading, vehicle activities will consist of (2) pickup trucks per day and one (1) mobilization of a bulldozer. Laramie estimates each cell phase (ten (10) total cells) will take 1-2 days to grade. Final contouring for the entire site will take approximately 2 days. Reclamation activities, such as revegetation and seeding, will require 5 days following final contouring. Vegetation and reclamation inspections activities will be conducted by personnel performing inspections at other facilities in the field and will not generate additional traffic.
Annex Cuttings Facility Trips The following Table 2 summarizes the expected average and maximum trips for the operational life of the facility.
Table 2: Trip Generation – Total Trips on Public Roads Per Activity - Annex Cuttings Facility
Stage Excavation
Equipment
Mobilization
Grading Equipment/
Bulldozer
Mobilization
Pickup
Trucks
Per Day
Pickup Trucks
Per Month
Total Maximum
Trips Generated
Per Activity Initial Grading Activities (10 weeks) 1 3 31 Transportation (30-50 days) 2 100 Treatment (18 months) 5 90 Final Grading and Reclamation Activities (27 days) 1 2 55
Total Lifespan Trips 1 1 144-184 54 278
The total maximum trips generated over the lifespan of the ACF will be approximately 278 vehicles. The site will operate from 3-5 years, depending on the drilling schedule. The average vpd would be less than a quarter (0.25) or one vehicle every 4 days. If Laramie was to haul the subject drill cuttings off-site to a landfill, semi-trucks would be utilized for delivery. The average semi-transportation truck can haul 18 cubic yards. This would result in approximately 1,612 trips of large vehicles accessing County Road. The ACF significantly reduces future traffic on public roadways. The proposed site will circumvent an estimated 1,330 large vehicle trips on public roads.
County Road 204 – Roan Creek Coad Based on the background traffic calculations, Laramie’s ACF related traffic will have an average of <0.0008 % increase on daily traffic activity during operations of the facility in 2021 on CR 204. The following Table 3 summarizes the expected percentage of trips this facility will generate on CR 204.
Table 3: CR 204 Trip Distribution – Annex Cuttings Facility
Year CR 204
VPD
Year CR 204
VPD (Estimated)
Generated Average
Operations Trips/Day
Generated Percent of
Trips/Day
Average 2019 310 2021 320 < 0.25 < 0.0008 %
County Road 213 – Conn Creek Road Based on the background traffic calculations, Laramie’s ACF related traffic will have an average of <0.002% increase on daily traffic activity during operations of the facility in 2021 on CR 213.
Table 4 summarizes the expected percentage of trips this facility will generate on CR 213.
Table 4: CR 213 Trip Distribution – Annex Cuttings Facility
Year CR 213
VPD
Year CR 213
VPD (Estimated)
Generated Average
Operations Trips/Day
Generated Percent of
Trips/Day
Average 2019 144 2021 144 < 0.25 < 0.002 %
ROADWAY ANALYSIS
Existing Parcel Current land use on the subject parcel is primarily natural gas development. The majority of existing traffic on CR 213 is related to natural gas development activities, very limited agricultural activities and very low density rural residential uses.
State Highway Crossings and Access The roadway access to this site does not cross any highway right-of-ways managed by the Colorado Department of Transportation. CR 204 is accessed via Mesa County 45 Road which intersects I-70 at Exit 62 in DeBeque, Colorado. This grade-separated interchange access point is controlled by stop signs at the top of each exit ramp. Site distances are adequate in both directions at these control points The US Highway 6 / I-70 Frontage Road terminates at Mesa County 45 Road approximately 300 feet northwest of the DeBeque interchange. This intersection is two-way stop-controlled. Traffic traveling to this site from I-70 would have the right-of-way at this intersection.
Railroad Crossings Mesa County 45 Road crosses under a main railroad line approximately 0.5 miles north of I-70. This line is generally used for the transport of freight, coal, and passenger rail traffic. This railroad crossing is grade separated. Clearance for transport trucks under this railroad bridge is adequate. The roadway access to this site does not cross any other active railroad right-of-way.
Intersection of CR 204 & 213 As noted above, there is a deceleration/turn lane for north bound traffic on CR 204 turning right onto CR 213. A stop sign controls west bound traffic on CR 213 at the intersection of that road with CR 204.
SUMMARY
Based on the expected trip generation rates discussed above, the increase in average daily traffic during is not expected to be significant on roads generally used by the public. CR 204 and CR 213 will see only a minor increase in traffic. The addition of traffic generated by the ACF, does not increase existing volumes to levels required for State or County permits or roadway modifications. Traffic associated with the three future well pads will be reduced on public roadways with the development of the proposed site.
DE
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CO RD213
CO RD213
CO RD492
CO RD202
CO RD200
CO RD213
CO RD213
3.9 MILESCO RD45.5
I-70
CO RD204
CO RD204
CO RD45 RD
T 7 S
T 8 S
R 98 WR 97 W8
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3
M
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LARAMIE PROPERTY
ACCESS POINT
GARFIELD COUNTY
MESA COUNTY
1414 ELK ST., ROCK SPRINGS, WY 82901
RIFFIN & ASSOCIATES, INC.
(307) 362-5028
PUBLIC ACCESS
DRAWN: 6/29/2020 - DEH
DRG JOB No. 21379REVISED: 7/7/2020 - DEH
SCALE: 1" = 4000'
MISCELLANEOUS EDITS
PUBLIC ACCESS ROUTE MAP
LARAMIE ENERGY, LLC.
CC 697-15-54 ANNEX
SWSE, SECTION 15, T.6 S., R.97 W., 6th P.M.,
GARFIELD COUNTY, COLORADOGARFIELD CO., COLORADOCC 697-15-54 ANNEX
PROPOSED ROUTE EXISTING ROAD
QUADRANGLE
CIRCLE DOT GULCH
LONG POINT
MOUNT BLAINE
RED PINNACLE
DEBEQUE
WAGON TRACK RIDGE
2.4 MILES6.4 MILES0.4 MILES
0.4
M
I
L
E
S
0.1 MILES
±741 FEET
T 7 S
T 6 SR 97 WLARAMIEENERGY LLCAPN: 216921400026
LARAMIE PROPERTY
ACCESS POINT
1414 ELK ST., ROCK SPRINGS, WY 82901
RIFFIN & ASSOCIATES, INC.
(307) 362-5028
LARAMIE ACCESS
DRAWN: 6/29/2020 - DEH
DRG JOB No. 21379REVISED: 7/7/2020 - DEH
SCALE: 1" = 2000'
MISCELLANEOUS EDITS
LARAMIE ACCESS ROUTE MAP
LARAMIE ENERGY, LLC.
CC 697-15-54 ANNEX
SWSE, SECTION 15, T.6 S., R.97 W., 6th P.M.,
GARFIELD COUNTY, COLORADOGARFIELD CO., COLORADOCC 697-15-54 ANNEX
PROPOSED ROUTE EXISTING ROAD
QUADRANGLE
CIRCLE DOT GULCH
LONG POINT
MOUNT BLAINE
RED PINNACLE
DEBEQUE
WAGON TRACK RIDGE
PROPOSED
LOCATION
CC 603-23-32
2.65 MILES
CC 610-21-41
2.20 MILES
CC 697-15-08
0.56 MILES
CC 697-15-54 ANNEX
CUTTINGS STORAGE R 97 WT 6 S
1414 ELK ST., ROCK SPRINGS, WY 82901
RIFFIN & ASSOCIATES, INC.
(307) 362-5028
PROPOSED CUTTINGS HAUL ROUTE
CC 697-15-08 ROUTE EXISTING ROAD
LARAMIE ENERGY, LLC.
CC 697-15-54 ANNEX CUTTINGS STORAGE
SECTION 3, 10 & 15, T.6 S, R.97 W., 6th P.M.,
GARFIELD COUNTY, COLORADO
CUTTINGS HAUL ROUTE
DRAWN: 06/16/2020 - TCM
21379REVISED: N/A - .
SCALE: 1" = 1000'
.
GARFIELD CO., COLORADO
PROPOSED CUTTINGS HAUL ROUTE
CC 603-23-32 2.65 MILES
CC 610-21-41 2.20 MILES
CC 697-15-05 0.56 MILES
PAD NAME MILES
CC 697-15-08 ROUTE CC 603-23-32 ROUTE
Roadway Standards
Site Security
Signs located throughout Laramie’s Cascade Creek operating field indicating caution and access to road condition information.
Speed limit signs and signage warning of sharp curves are located throughout the Cascade Creek operating field.
Numerous access restrictions are located at the parcel entrance. Unmanned guard station, gates, cattle guard, and numerous signs all act as access deterrents. Signage indicates danger, lists requirements for personal protection equipment, bears, and possible vehicle searches.
ACF Site Entrance
ACF Site Access Road
Entrance sign for the CC 697-15-54 location Sign states authorized personnel only and provides emergency contacts, location, and access information.
CC 697-15-54 Site Access Road:
Primitive Road
Southerly Direction – Towards the CC
697-15-54 Pad Location
CC 697-15-54 Site Access Road: Primitive
Road
Northwesterly direction – Towards
Intersection of the Laramie Cascade Creek
Field Access Road
ACF Site
Annex Cuttings Facility - Facing Northwesterly Direction
Towards the 3 tanks located on the CC 697-15-54 pad
Annex Cuttings Facility - Facing Southwesterly Direction
Towards the CC 697-15-54 pad and a weather station
Annex Cuttings Facility - Facing Northeasterly
ACF Site
Annex Cuttings Facility – Facing Southwesterly
Annex Cuttings Facility - Facing Southerly
Annex Cuttings Facility – Facing Northeasterly
ACF Site
Annex Cuttings Facility - Facing Northwesterly
Annex Cuttings Facility – Facing Northerly
Annex Cuttings Facility –
Facing Southwesterly
Annex Cuttings Facility –
Facing Westerly
ALTENBERN, COLORADO (050214)
Period of Record Monthly Climate Summary
Period of Record : 07/01/1947 to 06/10/2016
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Average Max.
Temperature (F)36.6 43.0 53.0 62.3 72.5 83.3 89.4 86.1 77.5 65.3 49.5 38.1 63.0
Average Min.
Temperature (F)10.2 16.6 23.5 29.9 37.4 43.9 50.4 49.1 41.1 31.3 21.2 12.3 30.6
Average Total
Precipitation (in.)1.29 1.23 1.42 1.45 1.50 0.95 1.24 1.61 1.54 1.62 1.30 1.30 16.45
Average Total SnowFall
(in.)16.5 11.0 8.1 3.0 0.6 0.1 0.0 0.0 0.1 1.3 7.6 15.1 63.4
Average Snow Depth
(in.)No Data
Percent of possible observations for period of record.
Max. Temp.: 80.6% Min. Temp.: 80.5% Precipitation: 99.9% Snowfall: 99.4% Snow Depth: 94.4%
Check Station Metadata or Metadata graphics for more detail about data completeness.
Western Regional Climate Center, wrcc@dri.edu
noaa
CLIMATOLOGICAL DATA
ANNUAL SUMMARY
COLORADO
2018
VOLUME 123 NUMBER 13
ISSN 0145-0506
GHCND Ver: 3.27-upd-2019051518
COLORADO PRECIPITATION 1918-2018
"I certify that this is an official publication of the National Oceanic and Atmospheric Administration (NOAA)
It is compiled using information from weather observing sites supervised by NOAA/National Weather Service
and received at the National Centers For Environmental Information(NCEI), Asheville, North Carolina 28801."
DIRECTOR
National Centers For Environmental Information
National
Oceanic and
Atmospheric Administration
National
Environmental Satellite, Data
and Information Service
National
Centers For Environmental Information
Asheville, North Carolina
TOTAL PRECIPITATION AND DEPARTURE FROM NORMAL (INCHES)COLORADO2018STATIONJANPRECIP. DEPART.FEBPRECIP. DEPART.MARPRECIP. DEPART.APRPRECIP. DEPART.MAYPRECIP. DEPART.JUNPRECIP. DEPART.2COLORADOARKANSAS DRAINAGE BASIN 01AGUILAR 18WSW0.31 0.81 0.30 0.82 1.52 0.47 AVONDALE 1 N0.06 0.36 0.18 0.45 0.61 0.00 BLACK FOREST 6WNW0.52 0.47 1.10 1.15 1.27 0.59 BOONE 9NNW0.15 M 0.25 0.05 0.43 M 0.10 BUENA VISTA 2S0.13 -0.170.15 -0.260.24 -0.46 0.84 -0.16 0.25 -0.820.19 -0.69CAMPO 7 S0.03 -0.320.05 -0.330.04 -0.96 0.45 -0.88 1.10 -1.001.29 -1.17CANON CITY0.24 -0.250.75 0.290.30 -0.84 1.42 -0.11 0.56 -0.850.03 -1.09CHERAW 1 N0.08 -0.250.36 0.000.29 -0.68 0.95 -0.31 0.49 -1.000.05 -1.70CLIMAX2.60 0.691.75 -0.031.94 -0.32 4.69 2.21 0.64 -1.281.29 -0.04COLORADO SPGS MUNI AP //0.16 -0.160.40 0.060.60 -0.40 1.08 -0.34 1.46 -0.571.43 -1.07COLORADO SPRINGS FS 20M 0.00 0.34 0.62 0.64 0.97 0.70 CUMBRE VISTA - COLORADO SPGS 1M M M 0.66 1.18 1.39 0.35 CRIPPLE CREEK 3NNW0.25 0.38 0.62 1.51 0.64 M EADS0.26 -0.080.19 -0.260.33 -0.60 1.33 -0.11 1.18 -1.080.80 -1.43EASTONVILLE 2 NNW0.67 0.35 1.01 1.16 1.75 1.55 ELLICOTT 7S0.12 0.43 0.03 0.41 0.88 0.46 FLORISSANT FOSSIL BED0.28 -0.200.35 -0.120.40 -0.78 0.91 -0.67 0.71 -0.920.47 -1.42GUFFEY 9SE0.43 0.64 0.51 1.32 0.55 0.09 HOLLY0.09 -0.280.02 -0.360.25 -0.84 1.49 0.19 1.30 -0.894.06 1.34HUGO 1 NW0.30 0.12 M 0.08 -0.250.38 -0.24 0.39 -0.67 1.60 -0.551.67 -1.05JOHN MARTIN DAM0.13 -0.100.03 -0.220.57 -0.30 1.21 0.19 0.13 -1.950.49 -1.41KARVAL0.14 -0.150.25 -0.060.04 -0.79 0.58 -0.69 1.20 -0.931.66 -0.34KIM 15 NNE0.79 0.250.14 -0.350.43 -0.85 0.48 -1.23 1.02 -0.840.11 -1.85KIM 10SSE0.17 -0.220.11 -0.280.13 -0.83 0.45 -0.80 3.30 0.941.39 -0.90KIT CARSONM M M M M M LA JUNTA MUNICIPAL AP0.14 -0.150.13 -0.230.48 -0.33 0.57 -0.69 0.70 -0.870.12 -1.24LA JUNTA AP PRECIPITATIONM M M M M M LA JUNTA0.14 -0.430.23 -0.13M 0.60 -0.63 0.81 -1.110.52 -1.13LA JUNTA 20 S0.47 0.070.10 -0.360.29 -0.97 1.05 -0.52 2.07 0.030.43 -1.29LAMAR0.09 -0.350.05 -0.430.28 -0.59 1.56 0.24 0.24 -1.881.04 -1.35LAS ANIMAS0.21 -0.170.08 -0.330.35 -0.58 0.88 -0.36 1.09 -0.850.53 -1.34LIMON HASS RCH0.11 0.26 0.18 0.15 1.85 0.78 MONUMENT 3S0.45 0.44 0.52 1.18 1.55 0.51 BEULAH (MPEC)0.49 0.73 1.15 0.82 0.84 0.37 ORDWAY 2 ENE //0.16 -0.030.18 -0.040.30 -0.29 0.45 -0.74 1.16 -0.430.46 -1.02PALMER LAKEM 0.92 0.69 1.41 1.26 2.06 1.05 PUEBLO MEM AP //0.23 -0.120.58 0.280.06 -0.87 0.49 -0.91 0.58 -0.930.17 -1.19PUEBLO RSVR0.19 -0.150.62 0.320.43 -0.49 0.46 -1.01 0.59 -1.070.36 -1.03ROCKY FORD 2 SE0.09 -0.190.38 0.050.54 -0.34 0.39 -0.89 0.49 -1.150.30 -1.23ROSITA0.19 0.73 0.38 0.37 0.22 0.24 RUXTON PARK0.46 -0.300.52 -0.320.86 -1.51 3.88 1.17 0.94 -1.501.28 -1.19RYE 1SW0.58 -0.770.93 -0.201.06 -1.47 0.74 -2.20 0.68 -1.540.43 -2.44SHEEP MTN0.05 -0.551.02 0.310.50 -0.25 0.30 -0.62 0.09 -1.22M SHERIDAN LAKE 4E0.21 M T 0.15 1.21 0.43 3.11
TOTAL PRECIPITATION AND DEPARTURE FROM NORMAL (INCHES)COLORADO2018STATIONJULPRECIP. DEPART.AUGPRECIP. DEPART.SEPPRECIP. DEPART.OCTPRECIP. DEPART.NOVPRECIP. DEPART.DECPRECIP. DEPART.ANNUALPRECIP. DEPART.3COLORADOARKANSAS DRAINAGE BASIN 01AGUILAR 18WSW 6.87 1.29 1.30 3.34 0.55 1.03 18.61 -2.82AVONDALE 1 N1.67 0.97 0.33 M M M BLACK FOREST 6WNW2.53 1.34 0.28 1.09 0.56 0.25 11.15BOONE 9NNW 2.56 0.95 0.55 1.65 M M BUENA VISTA 2S1.09 -0.47 0.80 -1.210.63 -0.37 1.42 0.56 0.26 -0.140.09 -0.316.09 -4.50CAMPO 7 S5.67 2.98 5.63 2.652.23 0.85 3.34 1.96 0.18 -0.260.68 0.21 20.69 3.73CANON CITY4.64 2.67 0.71 -1.520.98 -0.05 1.46 0.56 0.65 0.000.14 -0.40 11.88 -1.59CHERAW 1 N4.87 2.58 1.20 -0.740.98 -0.13 3.08 2.19 0.40 -0.020.00 -0.41 12.75 -0.47CLIMAX1.51 -0.91 1.97 -0.540.95 -0.76 2.03 0.32 2.90 0.931.72 -0.26 23.99 0.01COLORADO SPGS MUNI AP //4.46 1.62 3.25 -0.090.57 -0.62 1.61 0.79 0.30 -0.100.09 -0.25 15.41 -1.13COLORADO SPRINGS FS 20 MA 2.33 M 1.23 1.33 0.42 0.29 CUMBRE VISTA - COLORADO SPGS 13.77 1.74 0.48 1.13 0.51 0.33 CRIPPLE CREEK 3NNW4.22 3.60 1.50 1.14 0.50 MA 0.19 EADS3.86 1.47 0.94 -1.630.15 -0.87 3.62 2.41 0.21 -0.250.02 -0.36 12.89 -2.79EASTONVILLE 2 NNW5.74 3.96 0.27 1.91 0.70 0.40 19.47 -1.83ELLICOTT 7S2.72 3.28 0.23 2.02 0.12 0.10 10.80FLORISSANT FOSSIL BED 2.73 -0.13 2.80 -0.580.85 -0.48 0.78 -0.15 0.23 -0.410.15 -0.36 10.66 -6.22GUFFEY 9SE4.73 1.79 1.02 2.12 0.49 0.68 14.37 -3.71HOLLY3.09 0.33 2.38 -0.872.81 1.49 2.87 1.60 0.33 -0.251.29 0.86 19.98 2.32HUGO 1 NW4.30 1.55 M 1.21 -1.79 M 0.39 -0.69 2.21 1.20 0.05 -0.47T M 12.58 -3.15JOHN MARTIN DAMM 3.59 1.05 0.61 -1.560.24 -0.97 3.19 2.17 0.52 0.150.00 -0.42 M 10.71 -3.37KARVAL4.27 1.58 0.98 -1.400.47 -0.45 2.28 1.32T 0.04 -0.27 11.91 -2.56KIM 15 NNE3.04 0.29 2.74 0.281.38 0.08 2.45 1.34 0.67 -0.080.29 -0.34 13.54 -3.30KIM 10SSE3.59 0.64 3.92 1.211.44 -0.14 2.94 2.09 0.41 -0.100.25 -0.27 18.10 1.34KIT CARSONM M M M M M LA JUNTA MUNICIPAL APM 2.91 1.08 1.20 -0.401.55 0.72 2.92 2.01 0.17 -0.210.02 -0.26 M 10.91 -0.57LA JUNTA AP PRECIPITATIONM M M M M M LA JUNTA3.70 1.33 0.93 -0.920.96 -0.05 3.35 2.13 0.33 -0.16T LA JUNTA 20 S2.80 0.36 2.04 -0.020.61 -0.37 2.50 1.36 0.69 0.050.00 -0.58 13.05 -2.24LAMAR3.55 1.19 1.55 -0.960.81 -0.54 3.93 2.92 0.32 -0.200.18 -0.29 13.60 -2.24LAS ANIMAS4.79 2.55 1.79 0.100.40 -0.76 3.57 2.49 0.26 -0.160.04 -0.33 13.99 0.26LIMON HASS RCH2.69 0.63 0.17 1.67 0.21 0.02 8.72 -6.93MONUMENT 3S1.88 1.61 0.81 1.08 0.41 T 10.44BEULAH (MPEC)2.75 3.33 2.33 2.65 1.09 0.81 17.36 -4.91ORDWAY 2 ENE //MA 0.87 -1.06 MA 1.59 -0.410.74 -0.03 2.13 1.44 0.15 -0.180.01 -0.24 M 8.20 -3.03PALMER LAKEM M 0.66 1.15 0.97 0.24 PUEBLO MEM AP //1.78 -0.28 1.79 -0.530.08 -0.69 1.54 0.82 0.33 -0.140.09 -0.297.72 -4.85PUEBLO RSVR2.15 0.14 1.03 -1.380.90 0.05 2.11 1.38 0.34 -0.23M ROCKY FORD 2 SE2.69 0.65 1.09 -0.800.56 -0.31 2.34 1.44 0.22 -0.200.02 -0.349.11 -3.31ROSITA1.85 3.05 1.09 1.61 0.65 M RUXTON PARK5.49 1.84 2.37 -2.001.83 0.14 2.19 0.94 0.98 0.130.36 -0.68 21.16 -3.28RYE 1SW3.65 0.19 1.84 -1.041.48 -0.31 3.25 1.78 1.24 0.041.49 0.22 17.37 -7.74SHEEP MTN 3.03 0.82M 0.68 -0.27 1.76 0.84 0.36 -0.60M SHERIDAN LAKE 4E4.13 2.35 0.84 1.95 0.23 0.45 M 15.06
TOTAL PRECIPITATION AND DEPARTURE FROM NORMAL (INCHES)COLORADO2018STATIONJANPRECIP. DEPART.FEBPRECIP. DEPART.MARPRECIP. DEPART.APRPRECIP. DEPART.MAYPRECIP. DEPART.JUNPRECIP. DEPART.4SUGARLOAF RSVRMA 1.15 0.10 1.38 0.19 MA 0.67 -0.60 2.43 0.90 0.25 -1.08 0.85 -0.25TACONY 13 SE0.33 0.070.39 0.190.04 -0.51 0.30 -0.78 0.24 -1.290.23 -1.35TRINIDAD0.53 0.010.32 -0.260.67 -0.49 0.21 -1.07 0.94 -0.780.14 -1.57TRINIDAD AP //0.13 -0.270.29 -0.200.65 -0.24 0.28 -0.85 0.98 -0.630.45 -0.96TRINIDAD LAKE0.71 0.190.42 -0.280.69 -0.60 0.69 -0.80 1.31 -0.520.32 -1.65TWIN LAKES RSVR 0.68 0.37 MA 0.54 0.07 0.18 -0.53 1.61 0.97 0.28 -0.610.39 -0.52WALSENBURG 1 NW0.65 -0.190.64 -0.270.67 -1.29 0.80 -1.38 0.71 -1.110.43 -1.11WALSH 1 W0.17 -0.310.03 -0.420.28 -0.84 0.73 -0.83 2.27 0.052.34 -0.35WESTCLIFFE0.13 -0.490.81 0.240.36 -0.85 0.54 -1.04 0.32 -1.060.07 -0.94WFO PUEBLO0.21 0.66 0.04 0.59 0.63 0.17 WILD HORSE 6N 0.20 -0.120.39 0.01 0.26 -0.59 0.83 -0.47 1.29 -0.99 1.55 -0.78--DIVISIONAL DATA------->0.32 -0.160.44 -0.050.46 -0.66 0.96 -0.46 0.96 -1.060.74 -0.89COLORADO DRAINAGE BASIN 02ALTENBERN1.03 -0.082.12 0.891.71 0.29 1.45 -0.22 0.58 -1.150.20 -0.78ASPEN 1SW1.49 -0.213.19 0.981.65 -1.01 3.62 1.05 0.77 -1.331.19 -0.12ASPEN ASOS //0.62 -0.411.47 0.260.65 -0.67 2.56 0.72 0.52 -1.020.61 -0.52BLACK CANYON OF THE GUNNISON1.39 0.141.71 0.41 M 1.04 -1.26 1.76 0.20 0.31 -1.240.48 -0.42BLUE MESA LAKE //0.49 -0.131.20 0.500.08 -0.52 0.22 -0.33 0.16 -0.430.30 -0.28BONHAM RSVR //2.52 0.21 4.55 1.901.15 -2.57 3.65 0.68 0.55 -1.75 0.25 -0.94BRECKENRIDGE1.76 2.01 1.47 4.09 0.86 1.05 CEDAREDGE 3E0.84 -0.170.63 -0.300.36 -0.66 0.80 -0.25 0.19 -1.010.40 -0.43CIMARRON1.23 0.401.36 0.540.61 -0.39 3.28 2.12 0.33 -0.900.54 -0.24COCHETOPA CREEK0.47 -0.170.74 0.080.20 -0.55 1.27 0.33 0.07 -0.91 M 0.72 -0.05COLLBRAN 1WSW0.79 -0.150.86 -0.280.99 -0.49 1.23 -0.22 0.16 -1.230.09 -0.95COLORADO NM0.60 -0.181.35 0.73 M 1.21 0.21 0.75 -0.34 0.10 -0.930.33 -0.41CORTEZ0.75 -0.130.31 -0.630.23 -0.81 0.42 -0.51 0.48 -0.350.88 0.48CORTEZ ASOS //0.57 -0.440.30 -0.580.21 -0.98 0.52 -0.62 0.52 -0.401.36 0.88CRAIG ASOS //1.06 0.180.95 0.131.37 0.08 1.98 0.32 0.81 -0.730.11 -1.21CRAIG 4SW 1.25 0.19 1.34 0.15 MA 1.46 0.10 1.72 0.04 1.36 -0.04 MA 0.11 -1.17CRESTED BUTTE1.69 -0.672.40 -0.061.16 -0.86 2.34 0.47 0.14 -1.340.58 -0.62DELTA 3EM 0.18 -0.280.33 -0.19 M 0.12 -0.55 0.66 -0.05 0.07 -0.71 0.14 -0.48DILLON 1 E0.93 0.121.21 0.300.61 -0.41 2.71 1.44 0.84 -0.480.44 -0.81DURANGO ASOS //0.39 -0.730.49 -0.670.10 -1.15 0.20 -0.90 0.23 -0.570.84 0.20DURANGOM 1.43 0.00M M M M FT LEWIS0.73 -0.790.94 -0.480.54 -0.94 0.40 -0.72 0.73 -0.251.27 0.60FRASERM 1.06 -0.46 M 2.29 0.84 M 1.53 -0.32 M 2.03 0.13 M 0.51 -1.03 M 0.41 -0.94FRUITA0.36 -0.271.44 0.790.83 -0.10 0.60 -0.25 0.00 -0.75M GATEWAY 1ENE0.82 0.121.12 0.530.82 -0.28 0.58 -0.58 0.30 -0.690.03 -0.53GLADE PARK 17W 1.11 -0.032.04 0.971.99 0.57 0.52 -0.82 0.34 -0.780.05 -0.71GLENWOOD SPGS #20.94 -0.55 1.21 0.11 1.12 -0.30 3.00 1.48 MA 0.33 -1.460.57 -0.50GRAND JUNCTION WFO0.48 0.86 0.62 0.63 0.18 0.13 GRAND JUNCTION REGIONAL AP0.76 0.180.72 0.180.59 -0.33 0.69 -0.22 0.19 -0.690.09 -0.37GRAND JUNCTION 6 ESE0.45 -0.031.21 0.77 M 0.52 -0.35 0.54 -0.42 0.28 -0.65 0.10 -0.43GRAND LAKE 1 NW0.83 -0.691.42 0.000.86 -0.52 1.29 -0.30 M 0.94 -0.840.24 -1.36GRAND LAKE 6 SSW0.51 -0.370.60 -0.190.24 -0.66 0.59 -0.69 1.52 0.040.21 -1.09GREEN MT DAMMA 0.65 -0.25 MA 1.26 0.29M M M M GUNNISON 3SW 0.48 -0.28 0.56 -0.070.04 -0.45 0.90 0.19 0.10 -0.76 0.24 -0.47
TOTAL PRECIPITATION AND DEPARTURE FROM NORMAL (INCHES)COLORADO2018STATIONJULPRECIP. DEPART.AUGPRECIP. DEPART.SEPPRECIP. DEPART.OCTPRECIP. DEPART.NOVPRECIP. DEPART.DECPRECIP. DEPART.ANNUALPRECIP. DEPART.5SUGARLOAF RSVR 1.32 -0.68 MA 0.92 -1.30 1.12 -0.22 1.87 0.65 3.24 2.11 1.42 0.37 M 16.62 0.19TACONY 13 SE4.27 2.40 1.16 -1.430.41 -0.50 1.69 0.91 0.32 0.020.00 -0.239.38 -2.50TRINIDAD1.11 -1.57 1.52 -1.160.39 -0.94 2.27 1.01 0.53 -0.290.41 -0.169.04 -7.27TRINIDAD AP //0.31 -1.99 M 2.63 0.400.43 -0.81 1.93 1.03 0.28 -0.420.10 -0.44 M 8.46 -5.38TRINIDAD LAKE1.90 -1.02 2.30 -0.64 MA 1.03 -0.38 2.61 1.39 0.80 -0.150.34 -0.39 M 13.12 -4.85TWIN LAKES RSVR 1.92 0.33 MA 0.84 -0.81 1.03 0.03 1.42 0.68 0.86 0.320.06 -0.43 M 9.81 -0.13WALSENBURG 1 NW3.71 1.71 1.14 -1.210.61 -0.32 2.49 1.30 0.84 -0.360.59 -0.53 13.28 -4.76WALSH 1 W4.10 0.65 3.56 0.551.97 0.50 4.00 2.44 0.78 0.190.85 0.29 21.08 1.92WESTCLIFFE2.13 -0.30 1.20 -1.110.75 -0.14 1.62 0.64 0.34 -0.650.31 -0.278.58 -5.97WFO PUEBLO1.63 1.83 0.07 1.51 0.27 0.08 7.69WILD HORSE 6N 3.68 0.79 0.75 -1.851.16 0.18 MA 2.38 1.21M M --DIVISIONAL DATA------->3.23 0.86 1.93 -0.370.89 -0.26 2.20 1.28 0.57 -0.200.37 -0.16 13.07 -2.13COLORADO DRAINAGE BASIN 02ALTENBERN0.28 -1.19 1.72 0.120.01 -1.93 3.93 1.93 0.61 -0.870.74 -0.55 14.38 -3.54ASPEN 1SW1.02 -0.89 1.58 -0.090.52 -1.53 2.49 0.32 1.86 -0.591.88 -0.25 21.26 -3.67ASPEN ASOS //0.58 -1.13 1.79 0.110.59 -1.23 1.60 0.13 0.87 -0.500.41 -0.73 12.27 -4.99BLACK CANYON OF THE GUNNISON0.52 -1.55 0.43 -2.040.72 -1.58 2.90 0.93 0.50 -1.32 1.47 0.00 M 13.23 -7.73BLUE MESA LAKE //0.52 -0.53 0.45 -1.040.29 -0.73 0.90 -0.03 0.20 -0.340.73 -0.055.54 -3.91BONHAM RSVR //0.38 -1.83 2.25 -0.070.22 -2.33 4.09 1.64 2.03 -0.34 3.37 0.66 25.01 -4.74BRECKENRIDGE1.49 1.34 0.58 2.36 2.06 1.14 20.21 -0.22CEDAREDGE 3E0.40 -0.95 0.99 -0.360.18 -1.56 2.35 0.75 0.41 -0.481.10 -0.088.65 -5.50CIMARRON0.83 -0.43 0.66 -0.860.98 -0.76 2.84 1.43 0.72 -0.391.33 0.29 14.71 0.81COCHETOPA CREEK0.88 -0.56 M 0.80 -0.93 M 0.69 -0.54 1.01 0.21 0.74 0.070.39 -0.37 M 7.98 -3.39COLLBRAN 1WSW0.48 -0.78 1.17 -0.260.05 -1.70 3.08 1.35 0.25 -0.881.16 0.20 10.31 -5.39COLORADO NM 0.02 -0.81 0.94 -0.140.00 -1.24 2.51 1.24 M 0.34 -0.59 1.05 0.29 M 9.20 -2.17CORTEZ2.41 1.13 0.66 -0.820.36 -1.19 1.39 0.09 0.38 -0.681.82 0.94 10.09 -2.48CORTEZ ASOS //1.25 -0.04 0.38 -1.151.40 -0.38 1.50 0.30 0.53 -0.781.27 0.409.81 -3.79CRAIG ASOS //0.17 -0.99 1.45 0.060.18 -1.72 2.93 1.28 0.68 -0.770.73 -0.27 12.42 -3.64CRAIG 4SW 0.19 -1.01 1.40 0.16 MA 0.21 -1.69 2.70 0.89 0.60 -0.86 MA 0.89 -0.25 M 13.23 -3.49CRESTED BUTTE2.70 0.71 1.65 -0.601.28 -0.93 2.64 0.73 2.52 0.401.78 -0.48 20.88 -3.25DELTA 3E0.52 -0.47 0.30 -0.720.22 -1.05 M 2.12 0.75 0.10 -0.690.78 0.00 M 5.54 -4.44DILLON 1 E0.58 -1.34 0.83 -1.100.87 -0.55 1.10 0.18 1.52 0.590.69 -0.19 12.33 -2.25DURANGO ASOS //0.88 -0.84 0.44 -1.740.60 -1.31 1.99 0.65 0.04 -1.640.36 -0.816.56 -9.51DURANGOM M M M M M FT LEWIS0.76 -1.35 1.24 -1.050.51 -1.64 2.55 0.98 0.43 -1.15 1.14 -0.12 11.24 -6.91FRASERM 0.29 -1.45 M 1.20 -0.64 M 0.06 -1.55 M 1.43 0.09 M 1.67 0.24 M 0.63 -1.09 M 13.11 -6.18FRUITA0.00 -0.69 0.75 -0.140.00 -1.03 2.41 1.18 0.11 -0.631.02 0.33GATEWAY 1ENE0.58 -0.58 1.16 -0.400.10 -1.24 3.43 2.11 0.23 -0.661.12 0.37 10.29 -1.83GLADE PARK 17W1.42 0.60 1.11 -0.040.50 -1.13 3.52 2.02 0.17 -1.040.94 -0.20 13.71 -0.59GLENWOOD SPGS #20.07 -1.00 1.22 -0.050.24 -1.71 3.33 1.48 1.37 0.031.06 -0.22 M 14.46 -2.69GRAND JUNCTION WFO0.09 1.29 0.01 2.83 0.16 0.90 8.18GRAND JUNCTION REGIONAL AP0.08 -0.53 1.20 0.25T 2.76 1.70 0.19 -0.540.94 0.358.21 -1.21GRAND JUNCTION 6 ESE 0.23 -0.51 1.15 0.33 MA T 3.43 2.42 0.03 -0.78 MA 0.61 0.09 M 8.55 -0.70GRAND LAKE 1 NW1.46 -0.45 M 1.11 -1.200.58 -1.24 1.33 -0.16 2.51 1.240.71 -0.99 M 13.28 -6.51GRAND LAKE 6 SSW0.87 -0.83 2.21 0.480.34 -1.10 1.28 0.19 0.92 0.040.46 -0.449.75 -4.62GREEN MT DAMM M M M M M GUNNISON 3SW 0.41 -0.96 1.02 -0.57 0.86 -0.32 1.10 0.34 0.79 0.14 0.79 -0.147.29 -3.35
TOTAL PRECIPITATION AND DEPARTURE FROM NORMAL (INCHES)COLORADO2018STATIONJANPRECIP. DEPART.FEBPRECIP. DEPART.MARPRECIP. DEPART.APRPRECIP. DEPART.MAYPRECIP. DEPART.JUNPRECIP. DEPART.6HAYDEN1.65 0.051.92 0.591.90 0.54 2.95 1.10 0.85 -0.850.15 -1.07IGNACIO 6ESE0.29 -0.750.76 -0.440.09 -1.36 0.48 -0.84 0.47 -0.510.62 -0.01KREMMLING0.39 -0.211.19 0.540.48 -0.26 1.02 -0.03 1.05 -0.230.75 -0.24LAKE CITY 1NNE0.83 1.01 0.19 1.80 0.06 0.44 LEMON DAM1.10 -1.432.33 -0.060.72 -1.71 0.75 -1.15 1.21 -0.261.12 -0.07MANCOS 1SW1.00 -0.370.87 -0.410.34 -1.02 0.38 -0.86 0.49 -0.550.91 0.23MASSADONA0.71 0.35 0.21 0.91 0.64 M 0.00 MAYBELL1.03 0.20M MA 1.21 0.16 1.27 -0.08 0.39 -0.73T MEEKER1.35 0.251.34 0.271.92 0.43 2.34 0.55 1.19 -0.410.08 -1.16MEEKER ASOS //1.29 0.420.99 -0.031.80 0.51 2.23 0.71 1.42 -0.030.11 -1.13MESA VERDE NP0.77 -1.030.74 -0.890.50 -1.24 0.78 -0.51 0.49 -0.551.25 0.76MONTROSE ASOS //0.24 -0.410.65 0.070.19 -0.83 0.63 -0.34 0.16 -0.920.13 -0.64MONTROSE #2 0.26 -0.22 MA 1.25 0.81 0.06 -0.76 0.93 0.11 0.17 -0.80 0.76 0.21NORTHDALE 0.69 -0.05 0.60 -0.14 0.37 -0.50 0.18 -0.69 0.73 -0.140.05 -0.41NORWOOD #2M 0.82 0.36 0.85 0.41 0.29 OURAY #21.93 0.382.26 0.550.86 -2.05 2.64 0.68 0.50 -1.230.33 -0.79PAGOSA SPRINGS 1SE 0.98 -0.50 1.49 -0.03 MA 0.26 -1.37 0.25 -1.39 0.78 -0.37 MA 1.23 0.35PALISADE0.79 0.231.42 0.780.50 -0.55 0.51 -0.68 0.13 -1.000.06 -0.72PAONIA 2SW1.11 M M M M M PARADOX 2N0.61 -0.380.88 -0.130.31 -0.67 0.13 -0.77 0.05 -0.780.16 -0.49PLACERVILLE1.10 1.30 0.48 M 1.34 0.10 0.47 RANGELY 1E 0.60 0.020.38 -0.23 1.75 0.84 1.06 -0.06 1.07 -0.030.16 -0.73RIDGWAY0.62 -0.251.45 0.590.19 -1.38 1.72 0.27 0.14 -1.440.76 -0.28RIFLE 3ENE0.68 M 1.46 0.89 1.60 0.42 0.24 RIFLE ASOS //0.37 -0.441.00 0.240.84 -0.36 1.50 0.36 0.26 -1.250.27 -0.75SARGENTS1.09 1.55 0.28 1.61 0.37 0.76 SHOSHONE 1.59 1.54 1.75 MA 2.93 0.76 0.38 SILVERTON1.87 0.102.41 0.251.27 -1.11 1.39 -0.53 0.57 -1.160.65 -0.55STEAMBOAT SPRINGS1.47 -0.83 1.74 -0.161.29 -0.51 3.31 0.90 1.47 -0.77 0.96 -0.81TAYLOR PARK // 0.78 -0.50 1.30 -0.25 0.81 -0.65 1.85 0.30 0.53 -0.95 0.33 -0.73TELLURIDE 4WNW0.81 -0.671.08 -0.520.46 -1.51 1.35 -0.57 0.25 -1.580.50 -0.63VAIL1.44 -0.262.17 0.121.53 -0.66 2.82 0.44 0.99 -0.970.74 -0.75VALLECITO DAM1.05 -1.122.22 0.120.50 -1.60 0.55 -1.09 1.14 -0.221.19 0.14WILLIAMS FORK DAM0.94 0.071.15 0.291.19 0.21 1.52 0.17 1.31 -0.131.26 0.08WINTER PARK1.52 2.76 2.75 3.54 2.78 1.28 YAMPA1.17 -0.041.69 0.491.05 -0.25 2.31 0.75 1.45 0.010.60 -0.70YELLOW JACKET 2W0.98 -0.200.45 -0.980.45 -0.80 0.30 -0.72 0.71 -0.400.31 -0.21--DIVISIONAL DATA------->0.95 -0.321.32 0.160.81 -0.67 1.42 0.06 0.59 -0.880.50 -0.43KANSAS DRAINAGE BASIN 03AKRON 4 E0.88 0.520.69 0.290.55 -0.38 2.32 0.91 6.44 3.772.91 0.44ARAPAHOE0.17 0.21 0.17 1.12 4.31 2.30 ARAPAHOE 12S0.18 -0.450.15 -0.330.05 -0.90 1.15 -0.17 1.73 -0.722.14 -0.43BONNY DAM 2NEM M M M M M BURLINGTON1.19 0.870.67 0.230.69 -0.31 2.43 0.77 4.63 2.03 2.88 0.28CHEYENNE WELLS0.35 0.09 0.13 -0.250.13 -0.68 1.19 -0.07 2.41 -0.012.28 -0.26FLAGLER 1S0.25 -0.080.00 -0.310.30 -0.57 1.40 0.10 1.34 -0.93 2.82 -0.04FLEMING 3SW0.65 0.420.53 0.070.21 -0.89 1.60 -0.22 3.91 0.622.17 -0.51
TOTAL PRECIPITATION AND DEPARTURE FROM NORMAL (INCHES)COLORADO2018STATIONJULPRECIP. DEPART.AUGPRECIP. DEPART.SEPPRECIP. DEPART.OCTPRECIP. DEPART.NOVPRECIP. DEPART.DECPRECIP. DEPART.ANNUALPRECIP. DEPART.7HAYDEN0.15 -1.22 1.33 -0.040.17 -1.62 2.44 0.72 1.81 0.201.62 0.01 16.94 -1.59IGNACIO 6ESE1.74 -0.15 0.70 -1.470.61 -1.31 2.09 0.36 0.22 -1.060.46 -0.508.53 -8.04KREMMLING1.23 -0.16 1.47 -0.010.11 -1.21 1.62 0.74 0.34 -0.57M LAKE CITY 1NNE2.42 1.26 0.95 1.51 0.90 1.00 12.37LEMON DAM2.83 -0.28 1.44 -2.590.79 -2.68 4.09 1.31 0.52 -2.031.28 -1.17 18.18 -12.12MANCOS 1SW1.99 0.26 0.92 -0.940.79 -1.20 1.93 0.39 0.36 -1.261.78 0.57 11.76 -5.16MASSADONAM M M M M M MAYBELL0.58 -0.27 0.90 -0.080.15 -1.25 2.38 0.99 0.99 -0.110.59 -0.38MEEKER0.27 -1.02 1.11 -0.400.16 -1.56 3.34 1.43 0.71 -0.79 1.12 -0.11 14.93 -2.52MEEKER ASOS //0.21 -0.94 1.36 0.040.17 -1.59 3.13 1.27 0.80 -0.670.81 -0.30 14.32 -1.74MESA VERDE NP0.88 -0.72 1.36 -0.890.75 -1.12 2.46 0.74 0.36 -1.19 M 1.88 0.36 M 12.22 -6.28MONTROSE ASOS //0.19 -0.81 0.42 -0.840.38 -0.94 2.05 0.86 0.17 -0.640.62 -0.055.83 -5.49MONTROSE #2 0.24 -0.72 0.34 -0.92 0.09 -1.18 2.14 1.00 0.13 -0.73 MA 0.53 -0.09 M 6.90 -3.29NORTHDALE 1.20 -0.15 0.34 -1.19 0.73 -0.61 2.27 0.68 M T 1.00 0.11 M 8.16 -4.10NORWOOD #21.19 0.31 0.90 2.47 0.05 M OURAY #23.54 0.62 1.99 -0.630.68 -1.53 3.06 0.78 0.55 -1.471.72 0.28 20.06 -4.41PAGOSA SPRINGS 1SE 2.44 0.63 MA 1.30 -1.47 MA 0.38 -1.88 3.39 1.13 MA 0.11 -1.76 1.58 -0.12 M 14.19 -6.78PALISADE0.07 -0.61 0.85 -0.090.02 -1.33 4.02 2.62 0.16 -0.810.95 0.319.48 -1.85PAONIA 2SWM M M M M M PARADOX 2N1.46 0.27 0.51 -0.820.12 -1.50 3.43 1.87 0.15 -0.890.77 -0.458.58 -4.74PLACERVILLE2.86 0.47 0.90 2.39 0.22 1.53 M 13.16RANGELY 1E T 1.20 0.160.07 -1.34 2.48 1.00 0.51 -0.360.41 -0.199.69 -1.77RIDGWAY 0.71 -1.36 0.94 -1.230.54 -1.23 2.20 0.73 0.78 -0.591.45 0.66 11.50 -5.51RIFLE 3ENE0.14 1.69 0.10 2.63 0.64 0.83 M 11.32RIFLE ASOS //0.02 -1.11 1.74 0.340.05 -1.45 2.70 0.81 0.63 -0.470.67 -0.17 10.05 -4.25SARGENTS1.20 1.54 1.03 1.23 1.47 0.63 12.76 -2.90SHOSHONE 0.29 1.20 0.45 3.76 MA 2.22 1.87 M 18.74 -3.16SILVERTON2.51 -0.08 1.11 -2.170.38 -2.85 3.52 1.15 1.28 -0.541.09 -0.95 18.05 -8.44STEAMBOAT SPRINGS1.06 -0.46 2.32 0.72 1.35 -0.84 3.10 0.93 3.12 0.88 1.80 -0.69 22.99 -1.64TAYLOR PARK //0.72 -1.26 2.32 0.391.39 -0.24 M 2.22 0.78 1.80 0.31 MA 0.77 -0.63 M 14.82 -3.43TELLURIDE 4WNW2.35 -0.13 1.19 -1.710.80 -1.87 1.10 -0.82 0.33 -1.471.24 -0.36 11.46 -11.84VAIL0.44 -1.45 1.90 -0.050.39 -1.73 2.21 0.42 2.42 0.501.25 -0.38 18.30 -4.77VALLECITO DAM1.80 -0.81 1.24 -2.401.21 -1.98 3.98 1.30 0.48 -1.771.19 -1.00 16.55 -10.43WILLIAMS FORK DAM0.64 -1.09 1.63 0.11 M 0.19 -1.35 1.99 0.76 0.94 -0.110.40 -0.44 M 13.16 -1.43WINTER PARK0.78 1.87 0.60 2.35 2.16 1.22 23.61 -3.17YAMPA0.37 -1.22 1.06 -0.650.08 -1.47 1.50 0.22 1.11 -0.231.22 0.00 13.61 -3.09YELLOW JACKET 2W0.81 -0.60 0.34 -1.520.16 -1.64 2.59 0.88 0.40 -0.961.94 0.709.44 -6.45--DIVISIONAL DATA------->0.94 -0.60 1.16 -0.470.49 -1.03 2.50 0.94 0.81 -0.551.11 -0.05 12.60 -3.84KANSAS DRAINAGE BASIN 03AKRON 4 E2.06 -0.47 0.21 -2.340.26 -0.86 1.21 0.15 0.30 -0.30M ARAPAHOE3.36 2.40 1.87 2.69 0.34 0.24 19.18 1.01ARAPAHOE 12S3.38 0.47 1.22 -1.990.96 -0.17 2.50 1.05 0.30 -0.280.31 -0.48 14.07 -4.40BONNY DAM 2NEM M M M M M BURLINGTON2.97 -0.08 2.14 -0.370.89 -0.20 3.69 2.33 0.61 0.050.23 -0.23 23.02 5.37CHEYENNE WELLS4.65 1.43 0.84 -1.830.48 -0.81 2.23 1.08 0.20 -0.28T 14.89 -1.87FLAGLER 1S 2.86 -0.30 1.86 -0.800.46 -0.63 1.73 0.70 0.00 -0.470.00 -0.37 13.02 -3.70FLEMING 3SW1.57 -1.27 2.05 -0.430.54 -0.72 1.14 -0.17 0.39 -0.310.12 -0.40 14.88 -3.81
TOTAL PRECIPITATION AND DEPARTURE FROM NORMAL (INCHES)COLORADO2018STATIONJANPRECIP. DEPART.FEBPRECIP. DEPART.MARPRECIP. DEPART.APRPRECIP. DEPART.MAYPRECIP. DEPART.JUNPRECIP. DEPART.8GENOA0.40 -0.030.21 -0.25 M 0.37 -0.36 0.72 -0.65 2.41 -0.17 M 2.51 -0.09HOLYOKE0.72 0.310.63 0.140.28 -0.76 1.25 -0.65 4.60 1.601.71 -1.35IDALIA1.02 0.490.76 0.30 0.68 -0.58 2.46 0.46 3.83 0.85 2.01 -0.85JOES0.76 0.290.48 0.070.27 -0.81 2.89 1.14 4.08 1.202.82 -0.06KIT CARSON 9NNE 0.30 0.040.16 -0.23 0.02 -0.75 0.75 -0.70 1.26 -1.11 1.78 -0.94LEROY 5 WSW0.44 0.100.63 0.220.21 -0.78 2.31 0.68 5.00 2.302.37 -0.39SEIBERT0.34 -0.040.21 -0.150.48 -0.55 1.94 0.44 2.06 -0.500.72 -2.03SHAW 4ENE0.23 -0.140.35 -0.091.13 0.05 1.22 -0.27 2.90 0.591.22 -0.96TOWNER0.33 0.23 0.25 1.39 0.70 3.25 VERNON 4E0.92 0.71 0.39 2.19 4.56 3.23 WRAY1.47 1.00 M 0.86 0.390.38 -0.60 2.75 0.92 5.60 2.733.04 0.60YUMA 0.46 0.18 0.95 0.54 0.56 -0.30 1.69 -0.01 5.01 2.015.86 3.27YUMA 10 NW0.38 0.95 0.44 1.56 5.71 5.60 --DIVISIONAL DATA------->0.57 0.170.46 0.050.38 -0.70 1.72 0.13 3.62 0.512.69 0.14PLATTE DRAINAGE BASIN 04ANTERO RSVR0.39 0.150.12 -0.180.21 -0.39 0.42 -0.31 0.50 -0.570.39 -0.83BAILEY0.43 -0.050.65 0.100.99 -0.50 1.08 -0.75 0.89 -1.091.07 -0.83BOULDER0.74 -0.021.04 0.222.23 0.04 1.35 -1.52 4.76 1.961.82 -0.38BRIGGSDALEM M M M M M BRIGHTON 3 SE0.45 0.020.40 0.031.16 -0.04 1.66 0.00 1.45 -0.801.33 -0.59BUCKHORN MTN 1E0.75 0.180.83 0.101.33 -0.78 0.75 -1.81 4.59 1.330.88 -1.68BYERS 5 ENEM 0.33 -0.07 M 0.11 -0.281.06 -0.10 1.10 -0.59 2.08 -0.351.40 -0.64CABIN CREEK1.23 0.511.25 0.360.99 -0.94 1.59 -0.96 1.36 -0.620.68 -1.25CASTLE ROCK0.45 -0.170.33 -0.320.30 -1.53 0.55 -1.65M M CHEESMAN0.40 -0.070.52 -0.040.82 -0.63 0.61 -0.95 M 1.21 -0.600.76 -1.32COAL CREEK CANYON0.95 0.020.93 -0.131.88 -0.81 1.53 -2.11 4.23 1.391.69 -0.69CROOK0.64 0.350.71 0.310.47 -0.62 2.09 0.36 3.89 1.282.62 -0.34DENVER INTL AP0.54 0.130.31 -0.061.02 0.10 0.86 -0.85 1.86 -0.260.43 -1.55DENVER 1 SW 7NEWSM M M M M M DENVER-STAPELTON0.33 -0.140.38 -0.091.60 0.35 1.28 -0.46 2.20 -0.100.72 -0.97DENVER WATER DEPT0.31 -0.180.48 -0.09 M 1.83 0.35 M 1.01 -1.07 2.60 0.101.13 -0.83DENVER MUSEUMM M M 1.85 M M M DIVIDE 4NW0.54 0.52 0.62 1.19 1.29 0.96 ELIZABETH 7S0.50 0.31 1.40 0.48 1.46 M ESTES PARK 3 SSE0.59 -0.130.84 0.131.09 -0.78 0.59 -1.50 2.08 -0.321.27 -0.66EVERGREEN0.58 0.000.67 -0.031.19 -0.82 1.04 -1.20 3.06 0.701.78 -0.30FAIRPLAY S PARK RD 0.53 -0.02 MA 0.35 -0.21 MA 0.33 -0.74 MA 1.19 -0.02 0.71 -0.87 MA 0.58 -0.73FLATIRON RESERVOIR 0.33 0.68 1.01 0.65 MA 3.31 MA 1.46 FT COLLINS0.45 0.050.67 0.270.71 -0.88 0.75 -1.31 5.12 2.691.22 -0.95FT COLLINS 4 E0.37 -0.050.68 0.250.73 -0.69 0.93 -1.11 3.00 0.621.33 -0.71FT MORGAN0.39 0.15M M M 0.60 -0.67 3.60 1.39M GEORGETOWN0.75 0.050.96 0.110.89 -0.77 1.83 -0.27 1.25 -0.790.49 -1.26GOLDEN 3SW0.90 0.021.12 0.122.19 -0.44 1.57 -1.80 3.73 1.081.44 -0.77GOULD 4SE SFSP1.35 -0.29 M 1.32 -0.49 M 2.66 0.60 1.36 -1.17 M 1.91 -0.360.53 -1.13GRANT0.43 -0.11 M 0.63 0.030.68 -0.54 1.26 -0.17 1.25 -0.270.46 -1.08GREELEY UNC0.14 -0.340.64 0.240.54 -0.58 0.74 -1.07 M 3.24 0.851.88 -0.05GROSS RSVR0.77 0.090.84 0.061.76 -0.50 1.08 -1.76 3.56 0.711.30 -0.99
TOTAL PRECIPITATION AND DEPARTURE FROM NORMAL (INCHES)COLORADO2018STATIONJULPRECIP. DEPART.AUGPRECIP. DEPART.SEPPRECIP. DEPART.OCTPRECIP. DEPART.NOVPRECIP. DEPART.DECPRECIP. DEPART.ANNUALPRECIP. DEPART.9GENOAM 1.10 -1.63 2.99 0.030.45 -0.51 M 1.16 0.23 0.06 -0.50M HOLYOKE1.27 -1.56 1.53 -0.730.23 -1.10 1.37 0.18 0.65 0.010.40 -0.05 14.64 -3.96IDALIA4.42 1.58 M 2.16 -1.20 1.03 -0.13 2.97 1.67 M 0.39 -0.480.17 -0.30 M 21.90 1.81JOES3.01 -0.04 2.18 0.240.20 -0.92 2.34 1.21 0.12 -0.510.05 -0.43 19.20 1.38KIT CARSON 9NNE 3.15 -0.50 0.79 -2.26 MA 1.83 0.88 M 2.67 1.53 0.06 -0.30T M 12.77 -4.74LEROY 5 WSW5.51 2.48 4.07 1.790.44 -0.84 1.23 0.11 0.32 -0.250.11 -0.30 22.64 5.12SEIBERT3.74 0.22 3.38 0.01M 1.48 0.32 0.09 -0.45T SHAW 4ENE2.12 -1.19 0.77 -1.570.76 -0.20 1.58 0.52 0.24 -0.400.05 -0.39 12.57 -4.05TOWNER 3.45 1.27 1.17 2.95 0.32 0.61 15.92VERNON 4E3.04 1.94 0.40 2.75 0.68 0.15 20.96 2.07WRAY3.09 0.01 2.28 -0.210.36 -0.88 2.77 1.40 0.66 -0.05 0.03 -0.34 M 23.29 4.97YUMA1.71 -1.36 2.15 -0.36 0.50 -0.91 1.33 0.14 0.39 -0.09 0.13 -0.26 20.74 2.85YUMA 10 NW1.51 2.23 0.40 1.56 0.27 0.03 20.64 2.88--DIVISIONAL DATA------->2.99 0.10 1.91 -0.330.63 -0.48 2.08 1.19 0.32 -0.380.18 -0.17 17.55 0.23PLATTE DRAINAGE BASIN 04ANTERO RSVR2.32 0.40 0.48 -1.94 M 1.04 0.06 0.37 -0.38 M 0.26 -0.060.08 -0.23 M 6.58 -4.28BAILEY2.85 0.21 0.62 -2.351.12 -0.15 1.28 0.08 0.25 -0.570.16 -0.44 11.39 -6.34BOULDER1.84 0.05 0.24 -1.601.02 -0.66 2.68 1.13 1.19 -0.050.34 -0.60 19.25 -1.43BRIGGSDALEM 1.17 -0.89 MA 0.07 -1.17 M 0.48 -0.42 0.21 -0.250.03 -0.25BRIGHTON 3 SE1.38 -0.08 0.50 -1.610.28 -0.82 0.93 -0.03 0.20 -0.580.04 -0.459.78 -4.95BUCKHORN MTN 1E3.93 1.48 0.47 -1.900.74 -1.04 1.68 0.14 0.67 -0.360.27 -0.39 16.89 -4.73BYERS 5 ENE2.57 0.24 1.02 -1.061.20 0.21 1.22 0.21 0.36 -0.330.09 -0.39 M 12.54 -3.15CABIN CREEK2.14 -0.56 0.50 -2.510.73 -0.91 2.14 0.78 2.07 0.690.46 -0.55 15.14 -5.96CASTLE ROCK4.04 1.58 2.54 -0.170.42 -0.82 1.22 0.11 0.39 -0.610.08 -0.66CHEESMAN6.20 3.86 1.18 -1.870.57 -0.70 1.12 0.03 0.25 -0.520.01 -0.61 M 13.65 -3.42COAL CREEK CANYON1.57 -0.73 0.54 -2.311.40 -0.38 1.53 -0.21 0.91 -0.350.34 -0.82 17.50 -7.13CROOK2.72 -0.53 1.67 -0.501.43 0.24 1.35 0.21 M 0.57 0.090.17 -0.31 M 18.33 0.54DENVER INTL AP1.03 -1.13 0.93 -0.760.18 -0.78 0.99 -0.03 0.35 -0.260.03 -0.328.53 -5.77DENVER 1 SW 7NEWSM M M M 0.58 0.03 DENVER-STAPELTON1.43 -0.62 1.56 -0.500.90 -0.16 0.86 -0.22 0.33 -0.490.03 -0.56 11.62 -3.96DENVER WATER DEPT2.70 0.73 1.00 -1.130.61 -0.70 1.06 -0.20 0.28 -0.53T M 13.01 -4.06DENVER MUSEUMM M M M M M DIVIDE 4NW3.44 2.75 1.29 1.09 0.59 0.23 14.51ELIZABETH 7SM M M M M M ESTES PARK 3 SSE1.87 -0.42 0.95 -0.950.86 -0.56 1.50 0.34 0.71 -0.170.31 -0.33 12.66 -5.35EVERGREENM 1.71 -0.53 M 0.66 -1.811.10 -0.39 1.50 0.12 0.37 -0.520.08 -0.73 M 13.74 -5.51FAIRPLAY S PARK RD 1.82 -0.40M M 1.27 0.21 MA 0.51 -0.19M FLATIRON RESERVOIR 2.45 0.84 MA 0.15 MA 1.38 MA 0.65 0.13 M 13.04 -4.47FT COLLINS2.21 0.50 0.28 -1.320.46 -0.87 1.08 -0.07 0.62 -0.140.03 -0.47 13.60 -2.50FT COLLINS 4 E1.43 0.19 0.27 -1.070.52 -0.79 0.89 -0.26 0.45 -0.270.08 -0.40 10.68 -4.29FT MORGANM M M 0.83 -0.17 0.05 -0.390.02 -0.29GEORGETOWN1.18 -1.04 M 0.56 -1.730.43 -1.10 1.42 0.07 0.82 -0.150.17 -0.72 M 10.75 -7.60GOLDEN 3SW1.90 0.03 0.77 -1.451.96 0.54 2.12 0.37 0.86 -0.420.34 -1.15 18.90 -3.87GOULD 4SE SFSPM 0.93 -1.05 M 0.32 -1.50 M 0.08 -1.71 M 1.51 0.10 M 1.79 -0.06 M 0.96 -0.48 M 14.72 -7.54GRANT2.38 -0.16 1.05 -1.48 M 0.67 -0.70 1.24 0.20 M 0.24 -0.590.21 -0.43 M 10.50 -5.30GREELEY UNC1.59 -0.09 0.51 -0.950.18 -0.93 0.39 -0.62 0.41 -0.330.02 -0.54 M 10.28 -4.41GROSS RSVR1.99 -0.10 0.16 -2.21 M 1.43 -0.33 1.49 0.15 0.38 -0.700.04 -0.88 M 14.80 -6.46
TOTAL PRECIPITATION AND DEPARTURE FROM NORMAL (INCHES)COLORADO2018STATIONJANPRECIP. DEPART.FEBPRECIP. DEPART.MARPRECIP. DEPART.APRPRECIP. DEPART.MAYPRECIP. DEPART.JUNPRECIP. DEPART.10HOHNHOLZ RCH0.32 -0.410.40 -0.420.99 -0.39 0.42 -1.27 1.05 -0.640.40 -1.33HOURGLASS RSVR1.46 0.42 M 2.94 1.902.67 0.44 M 2.49 0.69 M 2.04 0.331.78 0.36INTER CANYON0.68 0.68 2.35 1.35 3.34 0.93 JULESBURG0.49 0.030.66 0.280.20 -1.02 2.04 0.32 6.83 4.034.73 1.74KASSLER0.39 -0.160.46 -0.162.32 0.58 1.12 -1.28 2.19 -0.250.98 -1.00LAKE GEORGE 8 SW0.24 -0.080.14 -0.170.37 -0.46 0.85 -0.04 1.10 -0.250.41 -0.99LAKEWOOD0.57 0.060.77 0.261.60 0.07 0.98 -1.24 M 3.30 0.850.76 -1.64LINDON 5 WNWM 0.39 0.070.17 -0.171.02 0.22 1.02 -0.40 3.08 0.912.82 0.39LONGMONT 2 ESE0.59 0.090.91 0.531.36 -0.03 0.99 -0.90 M 5.01 2.791.40 -0.43LOVELAND 2N0.52 0.000.92 0.400.84 -0.74 0.93 -1.23 3.69 1.300.68 -1.11MARSTON FLTR PLT0.47 -0.05 M 0.65 0.01 M 1.56 -0.04 1.30 -0.58 3.44 0.931.03 -1.08NEW RAYMER 21 N0.30 0.030.63 0.270.64 -0.38 1.21 -0.53 5.99 3.320.81 -1.75NORTHGLENN0.66 0.290.49 0.121.65 0.45 1.00 -0.84 2.10 -0.110.91 -0.76RALSTON RSVR0.43 -0.190.71 0.062.40 0.54 0.88 -1.65 2.75 0.090.81 -1.17ROXBOROUGH SP0.85 0.110.67 -0.293.03 1.12 1.35 -1.46 M 3.02 0.391.19 -1.11RUSTIC 9WSW0.36 -0.021.15 0.721.33 0.46 1.04 -0.22 2.16 0.781.56 -0.22SEDALIA 4 SSE0.37 0.34 1.56 1.04 2.47 0.26 SEDGWICK 5 S0.68 0.290.39 -0.140.32 -0.79 1.97 0.02 5.19 2.293.22 0.08STRONTIA SPRINGS DAM0.53 -0.220.51 -0.301.78 -0.60 1.15 -1.65 2.35 -0.360.89 -1.28VIRGINIA DALE 7 ENE0.50 0.000.68 0.181.73 0.45 1.26 -0.89 2.85 0.460.63 -1.61WALDEN0.30 -0.250.53 -0.110.41 -0.38 0.52 -0.65 0.96 -0.470.70 -0.61WATERDALE0.39 -0.04 M 0.83 0.370.61 -0.95 0.91 -1.01 3.34 0.551.29 -0.70WHEAT RIDGE 20.47 -0.170.83 0.131.60 -0.28 1.00 -1.20 2.48 -0.081.18 -0.87WOODROW 6NNE0.46 0.55 0.50 0.73 3.89 4.30 --DIVISIONAL DATA------->0.55 0.020.63 0.101.21 -0.08 1.09 -0.79 2.77 0.351.28 -0.59RIO GRANDE DRAINAGE BASIN 05ALAMOSA 1E0.12 -0.090.21 -0.100.16 -0.41 0.18 -0.53 0.41 -0.390.70 -0.05ALAMOSA-BERGMAN FIELD //0.08 -0.180.23 -0.030.15 -0.38 0.20 -0.39 0.14 -0.440.62 0.13CREEDE WTP //0.32 1.10 0.21 0.60 0.31 0.33 CRESTONE 2 SE0.18 -0.410.27 -0.160.23 -0.89 0.31 -0.81 0.31 -0.711.49 0.49DEL NORTE 3ENE0.02 -0.370.48 0.120.60 -0.23 0.12 -0.71 0.34 -0.490.59 -0.16GREAT SAND DUNES NP & PRESERVE0.54 0.010.37 -0.090.18 -0.94 0.59 -0.45 0.26 -0.940.68 -0.17HERMIT 8 SE0.38 -0.271.46 0.740.32 -0.61 0.84 -0.02 0.27 -0.560.20 -0.56MONTE VISTA 2W0.01 -0.350.40 0.110.42 -0.27 0.07 -0.58 0.10 -0.650.64 -0.01RIO GRANDE RSVR0.82 -0.232.05 0.760.78 -0.76 1.16 -0.39 0.59 -0.550.40 -0.62SANTA MARIA RSVR0.54 -0.371.38 0.660.37 -1.11 0.95 -0.43 0.31 -0.750.31 -0.68WAVERLY 1WT 0.21 -0.060.33 -0.48 0.18 -0.69 0.17 -0.600.67 -0.04--DIVISIONAL DATA------->0.30 -0.420.74 0.010.34 -0.87 0.47 -0.47 0.29 -0.730.60 -0.22
TOTAL PRECIPITATION AND DEPARTURE FROM NORMAL (INCHES)COLORADO2018STATIONJULPRECIP. DEPART.AUGPRECIP. DEPART.SEPPRECIP. DEPART.OCTPRECIP. DEPART.NOVPRECIP. DEPART.DECPRECIP. DEPART.ANNUALPRECIP. DEPART.11HOHNHOLZ RCHM 2.29 0.70M M 0.28 -0.99 M M M HOURGLASS RSVR2.34 0.88 0.96 -0.580.44 -0.86 2.55 1.60 M 2.99 1.760.90 -0.28 M 23.56 6.66INTER CANYON3.68 1.96 1.85 1.85 0.69 0.19 19.55 -2.79JULESBURG4.74 2.22 1.26 -1.321.26 -0.10 1.50 0.19 0.74 0.230.63 0.33 25.08 6.93KASSLER2.15 0.65 0.48 -1.600.76 -0.70 1.88 0.34 0.33 -0.830.01 -0.83 13.07 -5.24LAKE GEORGE 8 SWM 1.88 -0.33 0.60 -2.150.82 -0.24 M 0.85 0.18 0.31 -0.090.08 -0.27 M 7.65 -4.89LAKEWOOD1.42 -0.33 0.65 -1.322.79 1.59 M 1.34 0.16 0.37 -0.580.01 -0.64 M 14.56 -2.76LINDON 5 WNW2.76 -0.14 3.22 0.941.86 0.98 1.48 0.52 0.19 -0.44M LONGMONT 2 ESE2.10 0.97 2.00 0.370.33 -0.82 M 1.28 0.46 0.59 -0.110.09 -0.51 M 16.65 2.41LOVELAND 2N2.73 1.05 0.64 -0.680.12 -1.19 1.23 0.11 0.51 -0.260.05 -0.55 12.86 -2.90MARSTON FLTR PLT3.25 1.01 1.37 -0.89 M 0.62 -0.68 1.38 0.19 0.23 -0.680.02 -0.71 M 15.32 -2.57NEW RAYMER 21 NM 1.83 -0.46 1.13 -1.03M M 0.35 -0.28 M 0.16 -0.26NORTHGLENN1.51 -0.36 0.61 -0.921.40 0.39 1.19 0.22 0.58 -0.16T 12.10 -2.24RALSTON RSVR0.95 -0.59 0.53 -1.54 M 2.17 0.80 1.06 -0.26 1.12 0.090.39 -0.40 M 14.20 -4.22ROXBOROUGH SPM 1.66 -0.49 1.10 -1.591.71 0.20 M 2.89 1.35 M 0.91 -0.25 M 0.14 -0.85 M 18.52 -2.87RUSTIC 9WSW2.41 0.66 0.88 -0.670.33 -1.08 1.39 0.41 1.01 0.440.38 -0.14 14.00 1.12SEDALIA 4 SSE4.36 1.96 0.57 1.55 0.45 0.23 15.16 -2.78SEDGWICK 5 S3.73 1.20 1.43 -0.860.62 -0.78 1.50 0.21 0.58 -0.070.23 -0.20 19.86 1.25STRONTIA SPRINGS DAM1.72 -0.33 0.93 -1.590.80 -0.70 1.85 0.30 0.70 -0.650.07 -1.00 13.28 -8.38VIRGINIA DALE 7 ENE3.71 1.39 1.00 -0.670.48 -1.07 0.85 -0.26 0.59 -0.340.28 -0.20 14.56 -2.56WALDEN1.13 -0.28 1.39 0.190.38 -0.98 1.63 0.64 0.70 -0.200.08 -0.568.73 -3.66WATERDALE4.06 2.31 0.82 -0.950.16 -1.36 1.56 0.50 0.53 -0.190.11 -0.45 M 14.61 -1.92WHEAT RIDGE 21.10 -0.58 0.27 -1.742.30 1.17 1.05 -0.38 0.39 -0.700.01 -0.82 12.68 -5.52WOODROW 6NNE3.23 1.44 0.24 1.09 0.25 0.02 16.70 1.06--DIVISIONAL DATA------->2.49 0.35 1.03 -0.900.89 -0.46 1.36 0.36 0.54 -0.360.17 -0.41 14.01 -2.41RIO GRANDE DRAINAGE BASIN 05ALAMOSA 1E1.80 0.37 0.65 -0.690.73 -0.38 1.15 0.30 0.32 -0.260.17 -0.156.60 -2.38ALAMOSA-BERGMAN FIELD //1.05 0.08 0.64 -0.631.02 0.11 1.16 0.48 0.16 -0.260.32 -0.035.77 -1.54CREEDE WTP //1.07 1.33 0.81 M M M CRESTONE 2 SE1.47 -0.81 0.47 -1.730.74 -0.58 1.22 0.23 0.20 -0.460.71 0.187.60 -5.66DEL NORTE 3ENE1.37 -0.19 1.32 -0.561.32 0.14 0.94 0.11 0.33 -0.240.25 -0.307.68 -2.88GREAT SAND DUNES NP & PRESERVE1.08 -0.72 1.21 -0.870.78 -0.65 0.97 -0.01 0.14 -0.33M HERMIT 8 SE1.13 -1.06 1.06 -1.560.60 -1.10 2.14 0.88 0.14 -0.800.40 -0.288.94 -5.20MONTE VISTA 2W 2.29 0.89 1.10 -0.600.84 -0.08 1.10 0.39 0.31 -0.160.19 -0.237.47 -1.54RIO GRANDE RSVR1.79 -0.45 1.94 -1.130.69 -1.98 3.29 0.93 0.49 -0.851.25 0.13 15.25 -5.14SANTA MARIA RSVR2.44 0.02 0.96 -1.970.72 -1.50 1.62 -0.19 0.46 -0.680.43 -0.53 10.49 -7.53WAVERLY 1W1.16 -0.34 1.13 -0.770.84 -0.21 1.14 0.33 0.28 -0.210.18 -0.296.29 -3.66--DIVISIONAL DATA------->1.51 -0.22 1.07 -0.990.83 -0.63 1.47 0.19 0.28 -0.750.43 -0.318.33 -5.41
AVERAGE TEMPERATURES AND DEPARTURES FROM NORMAL(°F)COLORADO2018STATIONJAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANNUALTEMPERATUREDEPARTURE.TEMPERATUREDEPARTURE.TEMPERATUREDEPARTURE.TEMPERATUREDEPARTURE.TEMPERATUREDEPARTURE.TEMPERATUREDEPARTURE.TEMPERATUREDEPARTURE.TEMPERATUREDEPARTURE.TEMPERATUREDEPARTURE.TEMPERATUREDEPARTURE.TEMPERATUREDEPARTURE.TEMPERATUREDEPARTURE.TEMPERATUREDEPARTURE.12COLORADOARKANSAS DRAINAGE BASIN 01BLACK FOREST 6WNW35.3 31.6 41.0 44.4M 59.3 69.7 70.4 68.0 65.9 47.0 37.0 31.6 M 50.1BUENA VISTA 2S29.9 4.1 31.7 3.3 36.8 1.5 43.8 2.2 55.5 4.2 65.0 4.6 68.4 2.7 64.8 1.4 59.3 3.4 45.3 0.3 32.2 -2.1 26.9 1.2 46.6 2.1CAMPO 7 S35.8 1.4 35.9 -1.5 46.4 1.8 49.6 -4.1 68.0 4.6 75.6 2.4 76.7 -1.2 72.9 -3.1 67.7 -0.2 51.9 -3.8 39.9 -3.7 35.2 0.8 54.6 -0.7CANON CITY35.9 2.0 31.4 -4.1 42.0 0.0 46.4 -2.6 63.1 4.9 72.0 4.2 75.0 1.5 70.1 -1.5 67.3 3.9 49.9 -2.4 39.4 -2.2 34.0 0.6 52.2 0.3CHERAW 1 N31.1M 2.1 31.2 -2.2 45.0 2.7 48.0M -2.9 67.2M 6.3 76.5 6.0 77.1 1.5 74.0 0.0 68.5 3.6 52.8 0.5 40.8 1.0 32.4M 2.9 M 53.7 1.7CLIMAX18.9 5.3 17.8 3.1 24.0 4.2 30.3 4.6 42.5 7.2 49.5M 3.8 53.7M 1.8 51.2 1.2 46.9 3.7 31.2M -1.1 17.1F -3.9 MM M 34.8 4.2COLORADO SPGS MUNI AP35.0 4.5 31.9 -0.2 42.7 3.6 46.6 0.1 62.2 6.3 71.1 6.0 72.5 1.6 69.1 0.4 66.5 5.6 48.1 -1.3 37.4 -0.7 31.1 1.3 51.2 2.2CUMBRE VISTA - COLORADO SPGS 1 M M 40.4M 44.0 58.0 67.0 68.2 65.3 61.8 43.5 33.8 28.5 M CRIPPLE CREEK 3NNW27.7 4.5 25.4M -0.1 32.4 1.2 MM M M MM 58.6M -1.3 56.6 4.1 40.7 -2.1 26.8 -4.8 21.7 -0.9 M EADS31.7 2.5 31.0 -1.7 45.0 3.2 46.6 -3.5 66.3 5.9 75.6 5.2 76.8 0.6 72.0 -2.0 68.3 3.0 49.4 -2.6 38.9 -0.8 32.3 2.5 52.8 0.9EASTONVILLE 2 NNW27.3M 27.2M 35.4 42.5 54.2 63.1 66.1 63.3 58.5 41.5 30.4 24.2 M 44.5ELLICOTT 7S34.8 38.2 46.7F 52.6 67.4 71.2 75.5 72.7 65.9 52.8 43.3 34.7 54.7FLORISSANT FOSSIL BED25.5 4.7 26.1 2.9 33.3 2.9 39.5 1.8 50.3 3.9 59.7 5.2 62.5 3.5 59.0 1.6 54.3 3.8 40.6 0.1 27.2 -2.9 21.3 0.2 41.6 2.2GUFFEY 9SE31.3 27.6 35.1 41.2 53.8 64.3 65.0 61.5 59.2 43.1 30.8 26.2 44.9HOLLY31.3 2.4 32.2 -0.6 44.9 3.0 47.6 -3.9 67.7 5.9 76.4 3.9 77.5 -0.1 72.6 -3.0 69.3 2.6 50.8 -2.5 37.6 -2.2 32.0 2.6 53.3 0.6HUGO 1 NW31.3 3.8 28.4M -2.1 41.4 2.8 44.1M -2.4 62.6M 6.1 71.2 5.1 73.1 1.3 68.8M -1.3 66.1M 5.0 47.0 -1.6 35.7 -1.1 30.0 2.6 M 50.0 1.4JOHN MARTIN DAM33.0 3.1 34.0 0.1 46.1F 1.9 50.7 -2.3 69.0 6.2 78.6 5.8 80.3M 2.0 74.9 -1.4 70.6M 3.1 52.9 -1.3 39.2M -1.9 34.5 4.3 M 55.3 1.5KARVAL32.2 2.0 28.6 -4.1 42.3 1.9 45.4 -3.1 62.7M 5.1 72.3M 5.2 73.3M -0.1 68.9M -2.7 65.6 2.6 47.4 -3.6 37.6M -1.4 31.5M 1.6 M 50.7 0.2KIM 15 NNE35.2 2.3 35.4 -0.2 45.1 2.1 48.9 -1.4 66.2 6.1 76.3 6.3 76.5 1.4 72.4 -0.8 68.8 3.2 50.7 -2.5 38.4F -3.9 33.9 1.8 54.0 1.1KIM 10SSE38.6 4.4 40.1F 3.2 48.7 4.8 50.8 -0.8 66.8 5.4 72.8 3.0 74.2 -0.6 71.0 -1.4 66.1 1.2 52.8 -0.9 42.1 -0.3 38.8 4.7 55.2 1.8KIT CARSONM M M M M M M M M M M M M LA JUNTA MUNICIPAL AP35.3M 4.3 35.4 0.5 47.9 3.7 52.6M -0.2 69.2 6.4 79.3 6.7 79.5M 1.1 75.5 -0.6 70.3 3.0 53.0 -1.1 39.9 -1.0 33.9 3.0 M 56.0 2.1LA JUNTA34.6 3.9 34.0 -1.2 MM 50.6 -1.8 66.9 4.1 76.8 4.1 78.1 0.1 73.2 -3.1 69.0 1.1 51.8 -2.9 39.2 -2.3 34.3 3.4 55.3 1.3LA JUNTA 20 S34.2 2.3 34.2 -0.7 45.3 1.8 49.5 -2.7 67.4 5.4 76.8 4.5 78.2 0.3 73.6 -2.2 69.9F 2.9 51.0 -2.8 39.1 -2.4 32.9 1.2 54.3 0.5LAMAR30.3 0.5 31.7 -1.9 44.8 1.7 48.4 -4.1 68.1 5.5 77.7 5.2 78.4 0.6 73.7 -2.1 69.6 2.5 49.8 -3.6 36.9 -3.4 31.3 1.2 53.4 0.1LAS ANIMAS33.0 1.7 34.1M -1.2 46.9 2.3 50.7 -2.9 69.1 5.5 78.8 5.5 80.1 1.5 75.2 -1.3 70.5 3.0 52.5F -1.9 39.4 -1.6 32.9 1.7 M 55.3 1.0MONUMENT 3S31.9 28.5 38.1 42.2 57.0 67.2 68.8 66.1 63.0 44.6 33.8 28.1 47.4ORDWAY 2 ENEMM 31.2M -0.6 44.4 3.3 48.1 -1.7 66.0 5.6 75.9M 5.4 78.0 1.7 73.8 -0.4 69.6 4.9 MM 36.8 -1.1 31.2 3.1 M PUEBLO MEM AP34.2 3.7 34.0 0.1 45.4 3.1 51.2 0.6 67.4 7.0 76.6 6.6 78.9 3.1 74.0 0.6 69.7 5.0 51.4 -0.4 38.8 -0.5 32.1 2.0 54.5 2.5PUEBLO RSVR35.1 2.4 33.3 -2.0 45.3 1.4 49.7 -1.8 66.5 5.0 76.5 5.1 78.2 0.8 73.5 -1.4 69.8 3.3 51.0 -2.8 38.5 -3.5 MM 56.1 2.4ROCKY FORD 2 SE35.0 3.4 35.9F 0.2 47.6 2.8 53.5 -0.1 67.9 4.6 78.4M 5.8 77.0 -0.1 72.5 -2.7 68.8 1.8 52.7 -1.8 39.1 -2.0 32.9 1.7 M 55.1 1.0RUXTON PARK28.8 5.9 29.2 5.4 33.4 4.2 38.4 2.6 49.9 5.2 58.3 4.8 60.0 2.0 56.7 0.5 54.7 5.0 40.0 -0.5 27.9 -2.3 22.8 -0.3 41.7 2.6RYE 1SW37.4 6.2 34.6 1.8 43.7 6.1 47.9 3.2 61.6 7.8 71.5 8.6 72.0 4.0 67.8 2.2 65.3 6.1 48.0 -1.0 36.9 -1.2 31.8 1.6 51.5 3.7SHEEP MTN33.4 4.2 31.3 0.7 36.7 1.2 44.2 1.9 56.7 5.1 M MM M 61.7 4.1 47.8F 0.4 35.0 -1.4 M M SHERIDAN LAKE 4E30.9M 32.1M 44.9M 46.9M 64.6 74.5M 76.5 71.9 68.1 48.9M 36.8 31.1F M 52.3SUGARLOAF RSVR21.4 3.0 19.0 -0.1 25.2 0.5 33.9 1.9 45.8 3.8 55.0 3.7 58.0 1.4 54.5 -0.1 49.8 2.4 35.7 -2.1 21.6 -5.5 15.0 -4.4 36.2 0.3TACONY 13 SE33.7 0.8 32.2 -3.7 44.9 0.9 50.8 -1.7 66.1 4.1 75.0 3.5 76.4 -0.5 71.5 -3.1 68.2 1.7 50.2 -4.1 37.1 -4.6 30.9 -1.9 53.1 -0.8TRINIDAD38.1 4.4 38.8 3.1 48.0 5.6 52.1 2.3 65.7 6.7 75.7 8.1 76.5 4.6 72.1 2.2 67.6 4.5 51.1 -1.5 38.2 -3.0 33.4 0.7 54.8 3.1TRINIDAD AP36.0 3.7 36.7 1.7 45.8 3.6 50.2 0.5 65.0 5.8 75.0 6.6 76.8 3.3 72.5 1.1 67.6 3.4 51.8 -0.7 38.2 -2.4 33.0 1.4 54.1 2.3TRINIDAD LAKE33.3 2.2 35.6 2.4 41.8 2.1 47.2 0.6 61.7 5.4 70.8 5.3 72.3 2.4 68.8 0.9 62.9 2.1 49.0 -0.8 35.1 -3.8 30.6 -0.4 50.8 1.5TWIN LAKES RSVR24.4 5.6 24.2 4.0 28.5 2.1 37.4 4.0 46.3 2.5 56.0 3.6 59.3 0.9 56.5 -0.1 51.6 2.4 39.0 -0.8 25.9 -3.1 18.6 -2.2 39.0 1.5WALSENBURG 1 NW37.6 4.1 36.1 1.2 43.8 2.7 47.5 -1.2 62.1 4.4 72.4 5.9 74.2 2.4 70.0 0.0 67.4 5.0 49.5 -2.8 37.9 -3.1 33.6 1.1 52.7 1.6WALSH 1 W34.5 2.2 34.4 -0.9 47.2 3.9 49.7 -2.5 68.6 6.4 77.8 5.9 78.3 1.2 73.9 -1.3 69.0 2.0 52.0 -2.4 39.2 -3.1 33.5 0.9 54.8 0.9
AVERAGE TEMPERATURES AND DEPARTURES FROM NORMAL(°F)COLORADO2018STATIONJAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANNUALTEMPERATUREDEPARTURE.TEMPERATUREDEPARTURE.TEMPERATUREDEPARTURE.TEMPERATUREDEPARTURE.TEMPERATUREDEPARTURE.TEMPERATUREDEPARTURE.TEMPERATUREDEPARTURE.TEMPERATUREDEPARTURE.TEMPERATUREDEPARTURE.TEMPERATUREDEPARTURE.TEMPERATUREDEPARTURE.TEMPERATUREDEPARTURE.TEMPERATUREDEPARTURE.13WESTCLIFFE30.2 7.3 31.8 5.5 37.3 4.1 44.2 3.4 54.3 4.8 62.4 4.5 66.2 3.6 62.3 1.6 57.6 3.6 43.9 0.5 30.4 -1.6 24.4 0.8 45.4 3.1WFO PUEBLO34.0 33.7 45.4 51.4 67.1 75.9 77.8 73.3 68.9 51.5 39.0 31.6 54.1WILD HORSE 6N31.6M 2.7 28.4 -3.2 43.1M 3.8 45.0M -2.9 62.6M 4.9 73.6M 5.1 75.1M 0.8 69.9M -2.5 66.6M 3.3 MM MM MM M --DIVISIONAL DATA------->32.3 4.8 31.7 0.1 41.6 3.4 46.5 0.8 62.0 6.9 71.3 6.1 73.0 2.7 68.7 0.4 64.7 4.3 47.8 -1.2 35.6 -0.6 30.3 1.7 50.5 2.5COLORADO DRAINAGE BASIN 02ALTENBERN28.6 4.2 31.2 1.0 40.2 1.1 48.4 2.2 58.5 3.6 68.3 4.8 74.5 4.8 69.8 2.1 63.7 4.4 47.2 -0.7 32.3 -2.6 25.5 0.6 49.0 2.0ASPEN 1SW25.3 2.8 24.5 -1.1 31.1 -1.6 39.9 0.0 51.7 2.4 60.0 2.4 64.7 1.4 61.2 -0.5 57.6 3.2 41.9 -2.1 27.1 -4.5 19.6 -2.8 42.1 -0.1ASPEN ASOS26.3 6.5 26.3 4.1 34.8 3.9 42.3 2.5 53.4 5.0 62.5 5.0 68.6 5.1 64.4 3.1 58.9 5.6 43.5 1.3 28.9 -0.4 19.5 -0.5 44.1 3.3BLACK CANYON OF THE GUNNISON 28.5 5.5 30.4 3.9 36.0M 2.6 45.3 4.7 55.5 4.9 64.3 5.0 70.5 4.6 67.8 3.9 61.5 5.2 43.8 -0.8 30.0 -2.6 24.3M 0.5 M 46.5 3.1BLUE MESA LAKE19.7 6.3 25.6 8.1 32.3 2.5 42.2M 1.7 51.0F 1.0 61.4 2.8 68.1 3.0 63.9 0.5 56.8 1.4 43.3 -0.8 24.4 -5.9 11.4 -5.9 M 41.7 1.1BONHAM RSVRMM 21.2F 8.5 23.5 3.9 32.3M 5.7 43.2M 5.4 53.4M 4.5 58.5 4.6 55.1 3.8 49.9 5.8 36.7 3.4 20.2 -0.8 14.3 1.7 M 37.1 5.7CEDAREDGE 3E32.1 5.1 32.7 2.1 39.8 1.6 48.5 2.4 60.4 5.4 70.9 5.2 75.5 4.2 72.3 3.1 66.5 5.5 47.6 -1.3 33.8 -2.8 27.1 -0.2 50.6 2.4CIMARRON22.6 5.1 26.9 4.3 34.5 1.0 44.2 2.3 51.9M 1.7 61.1 3.1 68.1 4.1 67.2M 4.4 58.4M 3.8 46.2M 2.6 29.0 -2.1 19.0 -0.8 M 44.1 2.4COCHETOPA CREEK19.6 6.8 24.0 5.5 32.2 2.5 40.6 1.7 50.6F 2.9 59.0M 2.8 64.2 2.1 60.7M 0.0 54.8M 2.1 42.5M 1.2 24.1 -4.1 11.9 -3.8 M 40.4 1.6COLLBRAN 1WSW29.2 5.8 32.0 3.4 40.4 2.1 48.3 2.1 59.4 3.8 69.3 5.0 75.6 4.8 71.7 2.8 65.9 5.3 48.0 -0.5 33.3 -2.0 25.2 1.1 49.9 2.7COLORADO NM34.2 3.7 35.3M -0.2 44.6M 0.2 53.6 1.8 65.3M 3.1 76.7 4.0 82.1M 3.0 77.9M 1.7 72.0 4.6 50.5 -3.8 37.7M -2.9 MM M 57.3 3.4CORTEZ34.2 5.1 36.1 2.6 41.5 0.9 51.9M 4.4 60.9 3.9 69.8 3.7 76.2 3.5 73.2 2.3 66.5 3.8 51.1 0.3 36.7 -2.3 29.4 -0.6 M 52.3 2.2CORTEZ ASOS31.5 3.5 34.1 2.1 39.4 0.2 50.1 3.1 59.1 3.5 68.0 3.6 74.5 3.1 71.0 1.6 63.4 3.1 49.7 1.1 33.6 -3.3 27.4 -1.0 50.2 1.7CRAIG ASOS22.0 6.3 25.1 4.4 36.2 3.9 44.3 1.8 54.4 3.8 63.2 3.7 71.6 4.8 66.8 1.8 59.6 4.1 43.9 0.9 29.3 -1.0 18.0 0.4 44.5 2.8CRAIG 4SW23.9M 4.7 25.9 3.0 34.6 1.3 43.6M 1.3 53.9 2.7 64.1 3.7 71.4M 3.7 66.6 0.4 61.0 4.2 44.0 -1.2 29.2 -2.6 20.1 -0.4 M 44.9 1.7CRESTED BUTTE13.6 4.2 17.0 3.6 23.5 1.4 35.8 3.7 45.6M 2.7 54.0 2.8 59.8 3.0 56.2 0.6 50.8 2.9 38.6 0.7 20.2 -3.6 8.4 -3.0 M 35.3 1.5DELTA 3E31.2M 4.7 35.6M 2.0 42.7M -0.1 52.4 1.8 63.1M 2.8 72.6M 3.7 77.6 3.3 73.0F 0.7 66.5 3.5 50.7M -0.6 34.1M -3.8 29.6 2.1 M 52.4 1.6DILLON 1 E20.0 3.6 20.1 1.5 27.1 1.9 34.4 1.6 45.0 2.9 53.3 2.7 58.7 2.3 55.3 0.4 50.1 2.7 37.6 0.2 21.8 -4.3 15.7 -1.6 36.6 1.1DURANGO ASOS29.1 5.4 32.0 3.5 37.8 0.4 47.9 3.1 56.1 3.1 65.3 3.2 72.0 3.4 68.6 1.4 61.8 3.1 47.9 1.1 32.5 -3.0 25.9 -0.4 48.1 2.0DURANGOMM 33.2M 2.5 MM MM MM M M M M M M M M FT LEWIS28.9 5.5 29.6 2.5 35.8 1.7 45.4 3.7 53.6 3.7 62.3 3.7 68.6 3.7 66.1 2.9 60.3 4.4 46.0 1.2 32.7 -0.4 23.9 -0.5 46.1 2.6FRASER17.9M 3.5 21.9M 4.5 26.3M 0.6 38.1M 3.7 47.2M 3.3 54.7M 3.3 58.7M 2.2 55.3M 0.4 49.6M 1.9 38.9M 1.1 21.3M -3.0 10.3MF -4.3 M 36.7 1.4FRUITAM M MM 62.6F 12.0 68.8F 8.6 MM 80.1 4.3 77.1M 3.6 69.4 5.5 52.0F 0.6 34.4F -4.2 29.0 0.8 M GATEWAY 1ENE35.1 3.9 39.4 2.0 46.7 0.7 57.8 4.2 66.1 3.7 75.7 4.0 82.3 4.7 78.6 3.8 71.7 4.6 53.8M -0.6 41.1F -0.7 35.1 3.4 M 57.0 2.8GLADE PARK 17W28.8M 3.7 32.1 2.2 39.1 1.5 48.9 2.6 57.9 3.5 69.0 5.2 73.9 3.0 71.7 3.0 64.5 4.5 46.7 -1.0 32.8 -2.8 25.2 -0.2 M 49.2 2.0GLENWOOD SPGS #229.8 5.3 32.6 2.8 40.9 1.8 49.2 3.4 61.4M 6.9 70.7 7.2 76.4 6.3 70.3 1.8 63.9 4.0 48.8 0.3 33.1 -2.4 25.5 0.4 M 50.2 3.1GRAND JUNCTION WFO33.1 37.3 46.9 56.0 66.7 78.1 83.7 79.1 72.8 51.8 37.7 30.9 56.2GRAND JUNCTION REGIONAL AP 31.5 4.1 36.4 1.9 45.1 1.2 54.4 2.7 65.3 3.7 76.4 4.4 82.5 4.3 78.0 2.5 71.8 5.7 51.3 -1.7 36.2 -2.8 29.8 1.3 54.9 2.2GRAND JUNCTION 6 ESE32.7 3.4 36.4M 0.8 45.4M 0.3 54.7M 1.9 66.1 3.5 77.3 4.8 82.0M 3.3 77.9 1.8 71.6 4.5 52.0 -2.0 36.7 -4.1 30.2 -0.1 M 55.3 1.5GRAND LAKE 1 NW20.9 2.5 23.1 2.0 27.9 -0.4 36.4 1.0 46.7M 2.7 56.2F 3.9 59.8 1.9 56.6M 0.3 51.9 2.3 39.2 -0.5 21.1 -6.0 15.4 -2.9 M 37.9 0.4GRAND LAKE 6 SSW21.1 6.8 22.9 5.6 27.1 0.9 38.4 3.1 48.0 2.8 56.6 3.0 60.9 1.9 57.8 0.0 52.8 1.9 41.5 0.8 25.7 -2.6 16.7 -1.1 39.1 1.8GUNNISON 3SW17.3 8.2 24.1 8.9 32.0 3.6 41.7 3.4 51.0 3.7 58.4 3.2 64.9 3.8 60.5 1.2 53.5 2.5 41.8M 1.6 22.8 -3.7 9.8 -3.1 M 39.8 2.7HAYDEN22.4 3.1 25.3 2.1 35.5 1.5 44.9 1.1 55.3 2.6 62.4 1.3 70.3 2.7 66.3 0.2 60.5 3.0 44.6 -1.4 29.6 -2.8 19.5 -1.1 44.7 0.9IGNACIO 6ESE28.3 3.6 31.5 1.3 38.0 0.1 47.8 2.8 57.0 3.1 65.3 2.3 71.8 3.2 67.8 0.5 61.9 2.9 48.3 0.4 32.9 -2.8 26.9 0.2 48.1 1.4KREMMLING18.3 5.7 25.3 8.7 32.2 2.8 39.9 0.9 50.8 2.8 59.9M 3.2 65.2 2.7 60.7 -0.1 54.7 2.4 41.6 0.3 25.4 -2.4 MM M 43.1 4.5LAKE CITY 1NNE21.8 24.0 30.6 41.1 51.1 60.7 64.2 60.9 55.9 42.0 24.7 14.7 41.0LEMON DAM28.6 5.3 26.9 0.9 33.2 0.5 44.1 4.1 52.4 3.2 61.6 3.7 65.8 2.5 63.5 2.0 58.8 4.1 44.2 -0.4 32.9 -0.6 24.0 -1.1 44.7 2.0MANCOS 1SW32.5 6.2 31.9 1.7 39.3 3.2 50.8 8.3 56.1 5.3 64.2 4.0 69.6 3.9 66.8 3.3 61.3 5.1 47.6 2.0 34.0 -1.7 25.4 -1.3 48.3 3.3MASSADONA27.1 31.2 39.0 47.8 60.5 71.6M M M M M M M M MAYBELL22.2 4.7 MM MM 43.0 0.6 53.6 2.5 64.1M 4.2 70.5 3.3 65.0 -0.3 59.0 3.8 42.9 -0.4 27.8 -2.4 20.1 1.6 M MEEKER24.9 6.6 27.8 4.7 35.6 2.6 42.8 1.6 52.3 3.0 60.9 2.9 67.2 2.5 63.3 0.3 57.2 2.7 43.1 -0.1 29.0 -1.6 18.8 -1.2 43.6 1.9
AVERAGE TEMPERATURES AND DEPARTURES FROM NORMAL(°F)COLORADO2018STATIONJAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANNUALTEMPERATUREDEPARTURE.TEMPERATUREDEPARTURE.TEMPERATUREDEPARTURE.TEMPERATUREDEPARTURE.TEMPERATUREDEPARTURE.TEMPERATUREDEPARTURE.TEMPERATUREDEPARTURE.TEMPERATUREDEPARTURE.TEMPERATUREDEPARTURE.TEMPERATUREDEPARTURE.TEMPERATUREDEPARTURE.TEMPERATUREDEPARTURE.TEMPERATUREDEPARTURE.14MEEKER ASOS27.5 7.4 29.0 4.1 37.5 2.4 45.4 3.1 56.0 4.5 65.0 4.2 72.2 5.1 67.5 1.5 61.4 4.7 44.1 -0.3 30.6 -1.3 20.4 -0.9 46.4 2.8MESA VERDE NP34.7 5.2 33.6 0.9 40.4 1.2 50.8 4.6 60.6 4.9 70.8F 5.3 75.2 3.8 72.5 3.2 66.3 4.5 49.6 -0.4 37.4M -1.2 29.6M -0.2 M 51.8 2.6MONTROSE ASOS31.0 4.6 34.3 1.8 41.9 0.8 50.3 1.3 61.8 3.5 71.6 3.4 76.9 3.2 72.7 1.9 66.7 4.5 48.6 -1.4 34.0 -3.3 27.5 0.8 51.4 1.6MONTROSE #232.6 5.4 36.3 3.9 45.4M 4.2 53.3 4.8 63.4 5.7 73.9 7.1 78.5 6.2 74.5 4.4 68.3 6.6 50.7 0.5 36.1 -1.4 30.1 2.4 M 53.6 4.1NORTHDALE28.7M 4.3 30.3 1.7 36.6 -0.7 46.6M 2.3 55.1 1.9 65.5 3.5 72.4 3.5 69.0 1.9 61.4 2.6 46.6 -0.4 32.7MF -2.0 25.3 -0.1 M 47.5 1.4NORWOOD #2MM 30.3 36.5 46.6 56.1 65.5 70.1 67.8 62.1 45.5 32.1M MM M OURAY #230.3 3.9 30.4 1.7 36.8 2.2 44.3 3.6 55.6 4.7 64.9 4.9 68.6 3.4 65.9 2.5 61.1 3.9 45.3 -0.3 32.4 -2.9 25.7 -0.7 46.8 2.2PALISADE34.8 5.7 37.2M 1.5 46.6M 1.6 55.4 3.0 65.2 3.0 77.0 5.4 80.7 2.9 77.2 1.9 70.3 3.9 52.0 -1.8 38.2M -2.4 31.8M 1.6 M 55.5 2.1PARADOX 2N30.1 2.1 33.6 0.1 40.5 -1.1 52.2 4.0 62.2 4.1 72.6 5.0 78.7 4.3 75.5 3.0 68.5 4.9 51.1 -0.5 34.7 -3.7 27.9 -0.9 52.3 1.7PLACERVILLE30.1 2.3 29.9 -0.5 35.7 -0.3 45.1M 1.8 55.0M 2.9 64.9MF 3.2 68.7 2.1 66.4M 0.9 59.9M 1.9 43.3F -3.0 32.0F -1.5 25.7M -0.4 M 46.4 0.7RANGELY 1E23.7M 6.6 29.1 4.8 39.5M 1.8 48.4 1.7 61.2 4.9 71.7 5.2 78.0M 4.5 72.6 1.3 66.6 5.2 48.0 -0.2 30.7 -2.7 22.3 2.8 M 49.3 2.9RIDGWAY27.2 4.5 29.1 1.7 35.9 1.1 44.8 2.5 54.1 3.6 62.9 4.2 69.6 5.4 65.6 3.2 59.4 4.8 45.0 1.2 30.7 -2.3 23.3 0.1 45.6 2.4RIFLE 3ENE28.2 30.6M 39.3 46.8 58.5 67.7 73.3 68.4 61.9 47.2 31.7 25.2 M 48.2RIFLE ASOS30.1 6.1 32.1 1.4 41.8 2.2 49.8 1.9 61.2 4.7 70.9 4.7 77.8 5.1 72.4 2.0 66.4 5.2 48.7 -0.2 33.2 -2.4 25.1 0.1 50.8 2.5SARGENTS18.9 19.7 30.6 38.2 46.6 55.0 60.9 56.8 51.5 40.2 22.6 13.1 37.8SHOSHONE30.8 34.4 42.3M 49.4 62.6M 71.6 78.2 72.9 67.8 49.6 34.2 26.0 M 51.7SILVERTON18.4 3.7 17.9 -0.5 25.9 1.4 37.6M 4.9 45.8 3.3 54.1 3.7 MM 55.8 1.0 49.4 1.9 38.3 0.5 23.2 -2.3 14.9 -0.6 M 34.7 -0.4STEAMBOAT SPRINGS20.9 5.7 24.9 5.5 31.8 1.9 42.8 3.1 52.5 3.7 60.4 4.1 67.3 4.1 63.5M 1.7 58.1 5.1 42.5 0.6 26.0 -2.3 17.2 0.7 M 42.3 2.7TAYLOR PARK13.6 3.6 17.6 3.2 24.4M 2.6 36.0 3.7 45.9 2.7 54.3M 2.0 59.7 2.4 55.9 -0.1 50.3 1.1 38.8 -0.8 22.4 -3.7 9.4 -3.1 M 35.7 1.1TELLURIDE 4WNW22.7 4.0 24.3 2.6 30.2 2.3 39.5 3.8 47.3 2.6 56.8 4.1 61.4M 3.4 58.8M 2.1 52.1 2.3 40.5 0.4 27.0 -1.4 19.3M 0.1 M 40.0 2.1VAIL20.3 3.9 23.8 3.3 30.2 1.8 39.3 3.3 48.7M 3.2 55.6M 2.5 60.9 1.9 57.3 0.1 51.8 2.1 41.7 2.3 22.2 -3.7 16.6M -0.4 M 39.0 1.6VALLECITO DAM28.8 6.8 28.4 3.1 35.4 2.1 45.4 4.3 53.4 3.6 62.7 4.4 67.5 3.4 65.1 2.3 59.3 3.9 45.1 0.1 32.2 -1.3 24.6 0.0 45.7 2.7WILLIAMS FORK DAM18.4 6.0 23.8 7.7 31.5 4.4 39.8 2.9 50.1 3.9 59.0 4.5 64.1 3.6 60.3 1.3 54.8M 3.9 41.3 1.3 24.7 -2.2 15.9 0.8 M 40.3 3.1YAMPA24.5M 6.1 22.5 2.1 30.1 1.5 39.4 1.8 50.2F 3.4 59.9 4.5 65.5 3.8 61.6 1.3 57.7 5.4 41.0 -0.3 24.9 -3.1 17.1 -1.9 M 41.2 2.0YELLOW JACKET 2W32.5 3.8 32.8M 0.3 38.6 -1.0 50.3M 3.2 56.6M 0.2 67.5M 1.5 70.2 -1.8 MM MM 46.1M -4.8 32.2M -6.1 22.9M -6.6 M --DIVISIONAL DATA------->26.3 5.6 28.8 3.0 36.1 2.2 45.7 4.3 55.6 4.8 64.8 4.8 70.6 4.9 66.7 2.7 60.7 4.7 45.4 0.3 30.1 -1.6 22.0 -0.4 46.1 3.0KANSAS DRAINAGE BASIN 03AKRON 4 E31.0 2.8 27.3 -4.0 42.3 2.9 43.9 -3.3 61.3 4.2 71.6 4.4 74.3 0.2 71.0 -1.2 67.1 4.1 48.1 -2.1 37.4 -0.3 MM 52.3 2.6ARAPAHOE 12S31.4 2.2 29.8 -2.3 43.6 3.2 45.9 -3.3 66.3 7.5 75.1 6.2 76.2 1.0 73.6 0.3 66.8 2.2 48.5 -3.9 37.9 -1.9 32.5 2.8 52.3 1.1BONNY DAM 2NEM M M M M M M M M M M M M BURLINGTON32.0 2.4 27.9 -4.1 43.4 3.7 44.8 -3.4 63.6 5.2 72.8M 3.9 74.8 0.1 71.3 -1.6 67.2 3.4 48.0 -3.2 38.1 -0.7 33.0 3.5 M 51.4 0.6CHEYENNE WELLS32.2 1.0 29.1 -4.8 44.8 2.9 46.6 -3.3 64.9 5.2 73.3M 3.3 73.6M -2.3 72.3 -2.0 68.2M 2.5 47.9F -5.6 38.0 -2.5 31.9 0.7 M 51.9 -0.5FLAGLER 1S33.9 4.7 30.1M -1.2 43.7 4.2 49.2MF 1.9 63.5M 6.1 72.0 4.2 74.0M 0.6 69.6 -2.1 66.6M 3.7 49.2M -1.7 38.8M 1.1 33.0M 3.8 M 52.0 2.1FLEMING 3SW28.9 -0.2 25.8 -5.3 40.7F 2.1 42.4 -4.2 60.7 3.2 71.7 4.5 75.1 1.0 70.4 -2.0 66.9 3.9 48.4 -1.5 38.9 2.2 34.0 6.8 50.3 0.8GENOA33.7 4.2 28.4 -2.4 41.5M 2.9 44.5 -1.6 61.6 5.5 71.6M 5.5 72.2M 0.0 72.3 2.3 68.8 7.3 51.2M 1.1 37.0M -0.5 MM M 53.0 4.0HOLYOKE26.7 -0.3 24.6 -5.7 38.9 0.9 41.0 -6.1 60.5 3.2 71.1 3.9 73.5 0.4 69.9 -1.4 65.1 3.3 45.9 -3.2 34.7 -1.7 29.9 2.9 48.5 -0.4IDALIA29.2 0.7 26.5 -4.6 41.4M 2.0 43.3 -4.6 62.4 4.6 72.0M 4.0 74.9 0.4 70.4M -2.0 65.4M 2.3 46.3M -4.5 35.8M -2.2 31.8 2.9 M 50.0 -0.1JOES31.2 2.5 28.8 -2.8 42.7M 2.5 45.1 -3.3 62.2M 3.4 72.4 3.8 74.6M 0.6 71.0M -1.3 66.8 3.1 47.0M -4.3 37.5M -0.7 31.6 2.7 M 50.9 0.4KIT CARSON 9NNE29.7M 1.1 29.0M -2.4 42.3M 2.3 45.3M -3.2 64.1M 5.3 73.0M 3.7 76.1M 1.3 71.0M -2.1 67.1M 2.9 47.8M -3.3 36.0M -1.8 29.7M 1.7 M 50.9 0.4LEROY 5 WSW29.2 1.2 24.8 -6.3 39.8 0.8 40.8 -6.2 59.6 2.6 70.4M 3.4 72.3 -1.8 68.1 -3.9 62.6 -0.2 45.8 -4.4 34.8 -3.1 30.0 2.0 M 48.2 -1.4SEIBERT33.6 4.2 31.5 0.6 44.2 5.3 47.3 0.2 63.5 6.4 72.1 4.4 73.0 -1.1 71.0 -0.9 M 47.2 -2.9 35.9 -1.5 29.8 1.1 49.9 0.1SHAW 4ENE30.6 2.9 26.9 -3.2 41.1 2.5 44.2 -2.4 61.0 4.6 71.3 5.0 73.6 0.9 69.6 -0.8 65.4 3.9 46.4 -3.3 35.4 -1.9 30.6 3.2 49.7 0.9WRAY28.6 -0.3 26.7 -5.4 41.3 1.2 44.1 -4.6 63.1 4.0 73.0 3.8 75.4 0.1 71.2 -2.1 67.3 3.6 46.9M -4.0 36.5 -1.9 30.8 2.0 M 50.4 -0.4YUMA30.6M 1.0 26.9M -5.7 42.8M 1.7 45.5M -3.6 63.0 3.3 73.7 3.4 76.3 0.3 72.7M -1.2 68.6M 4.4 48.4M -3.3 37.7M -1.3 33.0M 3.8 M 51.6 0.1--DIVISIONAL DATA------->30.8 3.5 27.8 -4.6 42.2 2.8 44.6 -3.0 62.6 5.2 72.3 4.3 74.4 0.6 71.0 -0.8 66.7 3.9 47.7 -3.2 36.9 0.0 31.5 2.4 50.7 0.9PLATTE DRAINAGE BASIN 04
AVERAGE TEMPERATURES AND DEPARTURES FROM NORMAL(°F)COLORADO2018STATIONJAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANNUALTEMPERATUREDEPARTURE.TEMPERATUREDEPARTURE.TEMPERATUREDEPARTURE.TEMPERATUREDEPARTURE.TEMPERATUREDEPARTURE.TEMPERATUREDEPARTURE.TEMPERATUREDEPARTURE.TEMPERATUREDEPARTURE.TEMPERATUREDEPARTURE.TEMPERATUREDEPARTURE.TEMPERATUREDEPARTURE.TEMPERATUREDEPARTURE.TEMPERATUREDEPARTURE.15ANTERO RSVR21.8 8.0 23.6 7.2 29.0 3.9 37.1 3.5 47.5 4.1 56.0 3.9 60.7F 2.8 56.8 0.7 51.2M 3.1 38.0MF 1.1 20.0M -5.6 15.0 0.1 M 38.1 2.7BAILEY26.4 3.4 25.4 0.2 32.3 0.5 39.7 1.4 51.1 4.1 59.8 4.2 63.1 2.0 59.8 0.4 54.8M 3.0 40.2 -1.0 27.2 -3.2 22.0 -0.6 M 41.8 1.1BOULDER37.7 3.1 32.5 -3.2 43.4 0.8 49.1 -0.3 59.7 1.8 69.9 3.5 72.5 0.0 70.9 0.2 66.7 3.9 50.4 -1.4 39.4 -1.7 33.8 0.5 52.2 0.6BRIGGSDALEM M M M M M MM 68.3 -2.0 64.1M 4.0 46.0M -1.6 33.9 0.1 26.8 2.5 M BRIGHTON 3 SE32.9 3.6 29.3 -2.7 43.2 2.9 48.6 0.1 61.4 3.5 72.0 4.6 74.5 1.1 71.6M 0.2 66.4 4.0 48.5 -1.9 38.0 0.0 32.1 3.4 M 51.5 1.4BUCKHORN MTN 1E33.4 3.7 25.4 -4.4 37.3 2.1 40.8 0.4 53.1 3.9 65.0 5.8 66.6 -0.1 65.4 -0.1 61.9 4.9 42.7 -3.4 33.2 -3.1 29.1 -0.2 46.2 0.8BYERS 5 ENEMM 28.7MF -2.7 40.3 0.5 MM 60.8M 3.7 70.3 3.3 74.1 0.5 69.4 -2.1 65.4 2.7 47.6 -2.5 35.3 -2.2 29.8 1.8 M CABIN CREEK26.3 4.3 22.3 0.1 28.2 1.5 34.2 1.6 45.6 3.3 56.2 4.4 58.6M 1.3 MM 53.0M 4.2 37.0M -2.1 24.2 -4.5 21.5 -0.6 M 37.0 -0.5CASTLE ROCK34.8 3.1 31.5M -1.5 42.0 2.6 46.9 0.9 M M 72.6 2.2 68.6M 0.0 64.9F 4.2 46.9F -2.7 36.9 -2.2 31.9M 0.7 M CHEESMAN32.7 3.9 31.5 0.8 39.4 2.6 44.4 0.5 57.1M 3.9 67.4M 4.9 69.7 1.6 66.5 0.4 62.4 4.1 46.7 -1.0 35.5 -1.7 30.3 1.2 M 48.6 1.7COAL CREEK CANYON29.1 4.7 23.3 -0.6 30.7 1.1 37.2 2.5 47.3 3.7 57.3 4.0 61.1 0.8 59.1 0.9 55.3 4.6 38.1 -2.7 27.6 -3.3 23.4 0.1 40.8 1.2CROOK28.4 -1.0 27.0 -5.4 41.3M 1.3 43.9 -4.5 62.0 3.7 71.6 2.9 74.8 -0.8 70.6 -2.7 67.0 3.3 48.2 -3.2 37.1M -1.1 30.9 2.5 M 50.2 -0.5DENVER INTL AP34.6 3.9 29.9 -2.6 42.7 2.3 47.8 0.4 61.4 4.3 72.4 5.0 75.3 1.1 72.4 -0.1 67.8 4.4 49.2 -1.7 37.8 -0.5 32.5 2.5 52.0 1.5DENVER-STAPELTON33.7 2.8 28.7 -4.1 43.0 3.0 47.5 0.0 61.3 4.1 73.4 6.4 75.1 1.5 71.6 0.1 67.2 4.8 49.2 -1.1 38.6 0.0 33.0 3.0 51.9 1.7DENVER WATER DEPT36.6 2.4 31.8 -3.2 44.1M 1.6 50.2M 0.9 63.1 3.8 75.1M 6.1 77.2 1.1 75.0M 0.8 69.6M 4.3 49.9M -2.3 40.2 -0.3 35.0 2.4 M 54.0 1.4DIVIDE 4NW25.7 24.6 30.3 36.2 48.7 59.0 61.9 57.7 54.7 38.3 25.8 21.7 40.4ELIZABETH 7S32.4 29.2F 38.1 44.3 57.1 MM M M M M M M M ESTES PARK 3 SSE32.1 6.3 25.2 -1.0 32.7 1.0 39.8 1.3 51.9 4.0 62.3 4.6 64.5 0.8 62.0 0.1 58.4 5.1 41.9 -1.3 28.1M -4.5 25.3 -0.2 M 43.7 1.3EVERGREEN31.9 3.9 28.1 -0.8 36.7 1.4 42.3M 0.9 52.3 2.4 62.0 3.3 65.3M 0.7 63.0M -0.1 58.5 3.3 43.2 -1.5 34.0 -1.0 28.7 1.1 M 45.5 1.0FAIRPLAY S PARK RD25.1 3.8 21.9F -0.2 27.8 0.6 35.0 0.2 45.6 2.2 55.5 3.4 58.6 1.4 55.2M -0.9 52.3M 3.3 35.5 -4.2 22.2 -6.7 MMF M 39.5 1.7FT COLLINS33.9 2.8 30.6 -3.1 43.9 2.5 49.0 0.1 60.2 2.4 70.8 4.3 73.3 0.7 70.4 0.0 65.6 3.9 49.1 -1.1 38.4 -0.3 31.8 1.6 51.4 1.1FT COLLINS 4 E32.1 3.2 27.8 -3.8 42.3 2.8 47.1 -0.3 59.7 2.9 70.0 4.0 73.4 1.3 69.9 -0.1 64.7 3.8 47.7 -1.0 36.6 0.0 30.8 2.9 50.2 1.3FT MORGAN30.8 6.2 MM M 45.8M -0.9 62.7M 5.6 M M M 65.5 3.6 48.1 -0.6 35.7 0.9 29.1 4.6 M GEORGETOWN30.3 6.2 26.4 1.3 33.2 3.0 39.3 2.8 51.0 4.9 60.9 5.7 64.2 2.6 61.3M 1.8 57.3 5.2 41.6 -0.9 29.4 -2.0 26.2 2.1 M 43.4 2.6GOULD 4SE SFSP20.4M 3.4 19.4M 0.5 25.0M -0.8 34.0 1.1 44.8M 3.5 54.1M 4.3 58.7M 2.2 55.8M 0.8 51.0M 3.3 35.2M -2.2 21.4M -4.8 15.2M -2.3 M 36.3 0.7GRANT24.9M 2.8 22.9M -0.9 30.0 -0.3 36.8 -0.3 47.8M 1.6 57.2M 2.6 60.5 0.5 57.5M -0.4 53.3M 2.8 38.2 -2.6 25.6M -4.0 21.0 -0.7 M 39.6 0.0GREELEY UNC33.4 2.1 30.8 -4.2 45.0 1.2 50.4 -1.1 63.0 2.1 72.6 2.4 74.7 -1.5 72.3 -1.8 68.7 3.4 50.7 -2.2 38.8 -1.4 30.9 0.2 52.6 -0.2GROSS RSVR31.5 2.9 25.7 -3.6 34.1 -0.5 40.5 -0.4 51.3 1.6 61.3M 2.9 64.4 -0.4 62.0 -1.1 58.3M 3.8 41.9M -3.0 33.5 -1.9 28.2 0.4 M 44.4 0.0HOHNHOLZ RCH26.1 5.3 23.3 1.2 29.9 0.5 38.0 1.5 47.6 2.3 MM 61.3M 0.8 MM 52.4M 2.2 MM M M M HOURGLASS RSVR25.6 4.9 20.2M -1.3 27.4 0.3 33.9M 2.0 46.4M 5.1 56.5 4.9 59.0 1.0 56.3 0.2 52.5 3.8 36.9 -1.6 23.9M -3.9 19.9 -0.9 M 38.2 1.1JULESBURG25.6 -3.5 25.2 -8.2 39.1 -2.4 41.9 -7.8 61.5 2.2 71.6 2.7 73.7 -1.8 70.0 -3.4 66.1 1.9 46.3 -5.4 35.3 -4.1 28.9 -0.2 48.8 -2.6KASSLER35.9M 3.2 29.1 -5.0 41.8 1.1 47.4 -0.6 60.2 2.9 70.6M 3.6 73.1 -0.8 70.7 -1.3 66.7 3.6 49.1 -2.3 38.1 -2.4 31.7M 0.3 M 51.2 0.1LAKE GEORGE 8 SW21.4M 6.0 24.0 5.7 29.8 2.2 38.1 1.6 50.5 4.2 60.0 4.5 63.9M 2.7 59.7 0.2 55.2 3.5 40.1M -1.0 26.0 -3.1 18.3 1.0 M 40.6 2.2LAKEWOOD35.6M 2.0 30.3 -4.2 42.8 1.6 47.0M -1.4 59.1M 1.6 71.2 4.0 73.2 -0.8 70.3M -1.5 65.7 2.8 49.2M -2.0 38.6 -1.8 34.2 1.6 M 51.4 0.0LINDON 5 WNW31.7 4.2 30.9 0.9 MM 44.9 -1.3 60.6 4.4 71.0 4.5 76.0 2.8 70.2 -1.0 66.8 4.8 47.1 -2.2 35.5 -0.9 30.9 3.4 51.4 2.6LONGMONT 2 ESE32.2M 4.7 29.0 -1.4 43.6 4.9 48.2 1.8 60.9M 4.6 71.2 5.4 74.0 2.2 70.6M 0.9 66.3 5.6 49.0MF 0.6 37.6M 1.0 31.7 4.2 M 51.2 2.8LOVELAND 2N30.2 1.9 27.1 -3.9 41.3 2.6 46.1 -0.1 59.0 3.3 69.9 5.2 72.3 1.4 69.7 0.8 64.9 5.0 47.4 -0.9 35.7 -0.4 29.3 1.9 49.4 1.3MARSTON FLTR PLT35.7M 3.4 30.1M -3.3 42.6M 2.8 46.7 -0.5 60.3 3.1 70.7M 4.0 73.8M 0.6 70.1 -1.1 65.9MF 3.4 48.6 -2.2 38.7 -1.2 33.2 2.1 M 51.4 0.9NEW RAYMER 21 N29.1 5.2 24.3 -1.7 38.9 5.9 42.2 1.4 57.8 7.4 68.6 8.5 74.1M 6.8 M MM M 31.9M -0.1 27.6M 4.2 M NORTHGLENN35.8 2.2 30.9 -4.6 44.5 1.7 49.6 0.2 63.0M 3.9 73.6M 4.7 75.9 1.0 72.6M -0.6 68.6M 4.1 50.0M -2.5 39.2M -1.9 34.2 1.7 M 53.2 0.8RALSTON RSVR36.5 3.3 33.0MF -0.4 41.8 2.6 46.1 -1.1 59.1 2.3 70.1 4.4 72.6M -0.5 70.5M 0.2 67.1M 5.4 49.6M -0.6 38.8M -1.1 35.5 3.6 M 51.7 1.4ROXBOROUGH SP35.0 2.4 30.4 -2.3 39.9 0.8 45.9M 1.2 57.6M 3.0 67.6M 3.6 71.3M -0.4 69.7M 0.0 66.6M 6.1 46.2M -4.2 36.2M -2.9 32.1M 1.2 M 49.9 0.7RUSTIC 9WSW30.9 5.7 22.9 -2.7 31.8 0.4 38.0M 0.9 48.9M 2.8 59.3 4.0 62.4M -0.3 61.0 0.0 56.4 3.3 40.5 -2.0 29.2 -2.6 25.0 0.4 M 42.2 0.8SEDGWICK 5 S26.9 0.6 25.3 -4.3 40.3 2.5 41.0 -5.4 60.5M 3.8 71.6 4.2 72.9 -1.1 70.4 -1.5 66.3 3.6 46.6 -2.7 35.3 -0.9 29.9 3.9 M 48.9 0.1STRONTIA SPRINGS DAM30.4 1.3 28.0 -3.6 38.5M -0.1 43.8 -1.4 56.9 2.5 65.9 2.7 70.0 0.2 66.7 -1.6 63.0 3.2 45.7 -2.8 33.9 -3.3 28.4 0.6 M 47.6 -0.3VIRGINIA DALE 7 ENE29.8 3.2 23.8 -2.6 33.8 0.5 39.6 0.1 51.0 1.8 62.3 4.3 65.3 0.7 62.0 -1.1 60.0F 5.4 40.9 -1.4 31.4 -1.0 26.1 1.1 43.8 0.8WALDEN22.1M 6.1 21.1 2.7 27.5 0.7 36.1 1.2 46.2 2.3 53.9M 1.2 58.4 -0.1 54.6 -2.1 50.3 1.7 36.8 -1.5 22.6 -2.9 14.8 -2.1 M 37.0 0.5
AVERAGE TEMPERATURES AND DEPARTURES FROM NORMAL(°F)COLORADO2018STATIONJAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANNUALTEMPERATUREDEPARTURE.TEMPERATUREDEPARTURE.TEMPERATUREDEPARTURE.TEMPERATUREDEPARTURE.TEMPERATUREDEPARTURE.TEMPERATUREDEPARTURE.TEMPERATUREDEPARTURE.TEMPERATUREDEPARTURE.TEMPERATUREDEPARTURE.TEMPERATUREDEPARTURE.TEMPERATUREDEPARTURE.TEMPERATUREDEPARTURE.TEMPERATUREDEPARTURE.16WATERDALE31.6 0.9 27.1M -5.4 39.7 -0.5 44.7 -3.0 57.8 1.0 67.5 1.7 70.4 -1.9 67.8 -2.5 64.6 2.7 47.6M -2.4 35.5 -3.5 30.4 0.0 M 48.7 -1.2WHEAT RIDGE 234.1 2.2 28.8 -4.6 42.1 1.7 47.3 -0.1 60.1 3.5 70.9 5.3 73.5 1.7 70.2 0.5 65.2 4.1 47.7 -1.9 37.2 -1.4 31.7 0.8 50.7 0.9--DIVISIONAL DATA------->30.5 5.4 27.0 -2.0 37.2 1.9 42.9 0.6 55.6 3.9 65.8 4.3 68.8 1.6 66.1 0.8 61.6 4.6 44.7 -1.4 33.1 -0.4 28.0 1.6 46.8 1.8RIO GRANDE DRAINAGE BASIN 05ALAMOSA 1E23.9 6.8 29.0 5.7 34.3 1.2 45.2 3.8 54.9 3.9 63.1 4.5 67.4 3.7 63.2 1.9 58.3 3.7 44.9 1.4 29.2 -1.1 21.3 1.7 44.6 3.1ALAMOSA-BERGMAN FIELD23.6 7.3 28.5 5.7 34.6 1.1 44.8 3.0 54.2 3.0 62.6 3.0 67.1 2.5 63.1 0.4 57.6 2.6 43.9 0.8 28.2 -1.3 20.1 2.2 44.0 2.4CREEDE WTP19.4 8.9 21.7 4.5 30.3 3.1 40.6 3.5 46.5M 1.1 56.0M 2.5 MM MM MM M MMF M M CRESTONE 2 SE27.3 6.1 30.7 4.7 36.5 2.5 45.0 3.3 56.2 5.1 65.3 5.2 67.5 2.9 64.9 2.3 60.2 4.9 44.8 0.3 29.5 -2.0 22.1 0.5 45.8 2.9DEL NORTE 3ENE28.8 11.3 30.7 8.6 35.9 4.0 46.5 7.0 54.9 6.0 64.0 7.3 67.3 5.9 63.6 3.9 58.7 6.1 45.9 3.2 30.2 0.7 24.1 5.4 45.9 5.7GREAT SAND DUNES NP & PRESERVE 27.8 6.0 31.0 5.0 36.7 2.2 45.2 3.2 56.6 5.0 67.1 6.1 67.9 2.2 64.7 1.3 60.1 3.6 45.7F 0.5 31.4 -1.3 MM 48.6 4.9HERMIT 8 SE23.9 10.5 23.5 6.8 30.7 6.5 40.1 7.2 46.5 2.5 55.5 2.6 60.4 1.3 57.2 0.0 51.7 1.8 40.9 0.3 28.4 0.9 20.8 5.6 40.0 3.8MONTE VISTA 2W23.1 6.7 26.3 4.4 32.9 -0.2 42.7 1.5 51.5 1.4 60.4 2.7 64.8 2.4 61.4 0.6 56.2 2.8 43.9 1.1 27.5 -2.3 19.3 0.8 42.5 1.7RIO GRANDE RSVR20.8 6.2 19.3 1.4 27.2 2.8 38.5 5.4 47.1 3.5 55.5 3.5 59.8 2.2 56.9 0.9 51.9 2.4 38.1 -2.1 25.3 -1.7 16.8 0.9 38.1 2.0SANTA MARIA RSVR23.0 3.4 21.5 1.4 26.5 0.7 36.6 4.2 44.5 2.6 53.6 3.3 57.8 2.1 54.5 -0.2 49.9 2.3 37.9 -0.1 25.5 -2.6 18.3 0.2 37.5 1.4WAVERLY 1W22.1 6.2 27.0 5.4 33.1 0.6 44.0 3.3 53.7 4.3 61.2 3.9 64.5 2.2 61.5 0.6 56.3 2.7 44.4 1.4 27.4 -2.6 19.3 0.8 42.9 2.3--DIVISIONAL DATA------->24.0 6.9 26.3 3.5 32.6 1.6 42.7 4.2 51.5 3.4 60.4 3.6 64.5 3.1 61.1 1.5 56.1 3.3 43.0 0.5 28.3 -0.6 20.2 1.1 42.6 2.7
TEMPERATURE EXTREMES AND FREEZE DATA (°F)COLORADO2018STATIONLAST SPRING MINIMUM OFFIRST FALL MINIMUM OFHIGHESTDATELOWESTDATEDATETEMP.16° ORBELOWDATETEMP.20° ORBELOWDATETEMP.24° ORBELOWDATETEMP.28° ORBELOWDATETEMP.32° ORBELOWDATETEMP.32° ORBELOWDATETEMP.28° ORBELOWDATETEMP.24° ORBELOWDATETEMP.20° ORBELOWDATETEMP.16° ORBELOWNUMBER OF DAYSBETWEEN DATES16° OR BELOW20° OR BELOW24° OR BELOW28° OR BELOW32° OR BELOW17COLORADOARKANSAS DRAINAGE BASIN 01BLACK FOREST 6WNW99 06/29 -2 02/21 03/08 14 04/08 18 04/26 22 04/26 22 05/04 32 10/10 30 10/11 28 10/14 19 10/14 19 10/15 10 221 189 171 168 159BUENA VISTA 2S93 07/20 -4 12/29 04/15 16 04/19 19 04/25 24 05/04 28 05/04 28 09/26 31 10/13 28 10/15 8 10/15 8 10/15 8 183 179 173 162 145CAMPO 7 S104 06/28 0 01/16 02/26 14 04/08 20 04/15 23 04/19 26 04/23 32 10/14 30 10/15 25 11/09 20 11/09 20 11/13 16 260 215 208 179 174CANON CITY99 06/28 -2 01/16 04/02 15 04/19 19 04/19 19 04/25 27 04/26 29 10/14 29 10/15 16 10/15 16 10/15 16 10/15 16 196 179 179 173 171CHERAW 1 N106 06/28 -3 01/16 03/13 14 04/11 18 04/15 24 04/19 28 04/28 30 10/15 25 10/15 25 10/16 24 11/10 17 11/13 12 245 213 184 179 170CLIMAX77 07/22 -20 11/12 04/25 10 05/22 19 05/22 19 05/22 19 06/26 32 07/31 32 09/05 21 09/05 21 10/09 14 10/09 14 167 140 106 106 35COLORADO SPGS MUNI AP100 06/28 -1 01/16 03/07 14 04/07 19 04/07 19 04/25 28 04/27 30 10/10 32 10/14 20 10/14 20 10/14 20 10/15 16 222 190 190 172 166CRIPPLE CREEK 3NNW85 07/20 -3 12/29 04/18 14 04/18 14 04/20 24 04/20 24 04/20 24 09/26 30 10/09 28 10/10 24 10/14 16 10/14 16 179 179 173 172 159EADS104 06/29 -7 01/16 04/08 15 04/08 15 04/14 23 04/15 25 04/27 32 10/10 31 10/15 17 10/15 17 10/15 17 11/13 14 219 190 184 183 166EASTONVILLE 2 NNW94 06/27 -14 01/16 03/29 14 04/18 19 04/27 24 05/04 28 05/05 32 09/27 25 09/27 25 10/12 23 10/14 10 10/14 10 199 179 168 146 145ELLICOTT 7S100 07/21 -3 01/16 02/26 14 03/07 18 03/21 24 04/07 28 04/18 31 10/15 23 10/15 23 10/15 23 11/13 20 12/04 16 281 251 208 191 180FLORISSANT FOSSIL BED90 06/28 -12 02/10 04/25 10 04/27 19 05/23 24 06/02 28 06/26 30 09/10 32 09/23 28 09/26 24 10/14 14 10/14 14 172 170 126 113 76GUFFEY 9SE89 06/28 -4 02/21 04/18 14 04/25 17 04/25 17 04/27 28 05/04 30 09/26 30 10/09 28 10/11 23 10/14 14 10/14 14 179 172 169 165 145HOLLY105 06/28 -6 01/17 04/08 16 04/08 16 04/16 24 04/19 28 04/28 31 10/15 21 10/15 21 10/15 21 11/09 18 11/13 10 219 215 182 179 170HUGO 1 NW100 06/29 -8 01/16 04/05 15 04/14 20 04/20 24 04/26 25 04/27 31 09/26 30 10/14 23 10/14 23 10/15 11 10/15 11 193 184 177 171 152JOHN MARTIN DAM108 06/30 -5 01/17 03/07 15 04/07 20 04/08 23 04/19 27 04/19 27 10/14 31 10/15 26 11/09 24 11/17 20 11/26 14 264 224 215 179 178KARVAL101 06/29 -7 01/02 04/07 16 04/08 17 04/14 21 04/26 28 04/27 31 10/10 29 10/14 23 10/14 23 10/15 16 10/15 16 191 190 183 171 166KIM 15 NNE104 07/21 -3 01/17 03/06 8 04/15 20 04/15 20 04/27 28 04/27 28 10/10 31 10/14 27 10/15 18 10/15 18 11/14 9 253 183 183 170 166KIM 10SSE101 07/23 12 01/16 01/16 12 02/26 20 03/07 23 04/08 28 04/19 30 10/15 27 10/15 27 11/09 24 11/13 20 12/29 16 347 260 247 190 179KIT CARSON88 05/18 52 05/18 MSG MSG MSG MSG MSG NONE NONE NONE NONE NONE LA JUNTA MUNICIPAL AP108 06/28 -2 01/01 03/07 16 03/12 17 04/07 21 04/15 26 04/16 30 10/14 24 10/14 24 10/14 24 11/09 20 11/12 15 250 242 190 182 181LA JUNTA106 06/29 2 01/02 02/26 13 03/13 19 04/08 22 04/16 26 04/25 32 10/12 28 10/12 28 10/14 21 11/10 20 11/13 14 260 242 189 179 170LA JUNTA 20 S106 06/27 -4 12/31 03/12 16 03/13 17 04/08 24 04/17 28 04/26 32 10/13 30 10/14 22 10/14 22 11/08 20 11/12 14 245 240 189 180 170LAMAR109 06/29 -5 01/17 03/13 15 04/08 17 04/08 17 04/16 27 04/27 30 10/10 32 10/15 20 10/15 20 10/15 20 11/13 12 245 190 190 182 166LAS ANIMAS110 06/28 -6 01/16 03/12 15 04/07 19 04/08 23 04/15 25 04/27 30 10/14 29 10/15 21 10/15 21 11/09 18 11/13 15 246 216 190 183 170MONUMENT 3S97 06/29 -11 02/21 04/07 16 04/25 19 04/26 23 04/27 26 05/04 32 10/10 28 10/10 28 10/14 18 10/14 18 10/15 7 191 172 171 166 159ORDWAY 2 ENE106 06/29 -2 02/11 03/11 13 04/07 20 04/15 22 04/27 25 04/27 25 10/31 32 11/01 27 11/08 18 11/08 18 11/10 15 244 215 207 188 187PUEBLO MEM AP106 06/27 -3 02/11 03/12 16 04/04 20 04/15 24 04/27 28 04/27 28 10/14 22 10/14 22 10/14 22 10/15 16 10/15 16 217 194 182 170 170PUEBLO RSVR104 06/28 1 01/02 02/26 15 03/13 19 04/09 22 04/19 28 04/19 28 10/14 28 10/14 28 10/15 18 10/15 18 11/13 13 260 216 189 178 178ROCKY FORD 2 SE104 06/28 -7 02/23 03/12 14 03/20 20 04/15 23 04/15 23 04/27 29 10/14 28 10/14 28 10/15 21 10/16 19 11/10 16 243 210 183 182 170RUXTON PARK83 06/29 -5 12/29 04/25 10 04/25 10 04/27 23 05/04 26 05/16 32 09/25 32 10/10 24 10/10 24 10/14 16 10/14 16 172 172 166 159 132RYE 1SW96 06/28 5 02/21 02/22 12 04/07 20 04/14 22 04/25 25 04/25 25 10/10 30 10/14 18 10/14 18 10/14 18 10/15 15 235 190 183 172 168SHEEP MTN91 07/23 0 02/25 03/12 16 04/29 20 04/29 20 04/29 20 04/29 20 09/26 30 10/10 28 10/31 24 11/04 20 11/09 15 242 189 185 164 150SHERIDAN LAKE 4E105 06/28 -11 01/16 04/07 15 04/08 17 04/08 17 04/27 28 04/27 28 10/10 32 10/14 27 10/15 13 10/15 13 10/15 13 191 190 190 170 166SUGARLOAF RSVR82 06/28 -22 02/21 04/25 16 04/27 20 05/04 24 05/19 28 06/30 32 08/19 32 09/21 25 10/08 24 10/13 20 10/15 -1 173 169 157 125 50TACONY 13 SE105 06/28 -5 01/02 03/12 16 04/07 19 04/15 22 04/25 25 04/27 29 10/13 32 10/14 22 10/14 22 10/15 14 10/15 14 217 191 182 172 169TRINIDAD99 06/27 2 12/29 02/21 5 04/07 20 04/07 20 04/25 28 04/25 28 10/09 31 10/14 19 10/14 19 10/14 19 11/12 4 264 190 190 172 167TRINIDAD AP102 07/22 -3 01/16 03/07 14 03/20 18 04/18 22 04/25 28 05/03 32 10/14 19 10/14 19 10/14 19 10/14 19 10/15 15 222 208 179 172 164TRINIDAD LAKE98 06/30 -1 12/30 03/22 16 03/29 20 04/19 24 05/04 25 05/05 32 10/10 29 10/13 26 10/15 20 10/15 20 11/09 16 232 200 179 162 158TWIN LAKES RSVR85 06/29 -21 02/21 04/19 16 04/20 20 05/16 24 05/31 27 06/12 32 09/18 32 09/22 27 09/26 22 10/15 11 10/15 11 179 178 133 114 98WALSENBURG 1 NW100 06/28 1 11/13 03/07 14 04/02 19 04/19 22 04/25 26 04/27 31 10/07 31 10/14 27 10/15 15 10/15 15 10/15 15 222 196 179 172 163WALSH 1 W107 07/21 -6 01/16 04/07 16 04/07 16 04/15 21 04/19 26 04/27 31 10/10 32 10/15 23 10/15 23 11/09 20 11/13 5 220 216 183 179 166WESTCLIFFE91 06/27 -12 12/29 04/19 12 04/25 19 05/05 24 05/06 28 06/02 31 09/14 31 09/26 23 09/26 23 10/14 16 10/14 16 178 172 144 143 104
TEMPERATURE EXTREMES AND FREEZE DATA (°F)COLORADO2018STATIONLAST SPRING MINIMUM OFFIRST FALL MINIMUM OFHIGHESTDATELOWESTDATEDATETEMP.16° ORBELOWDATETEMP.20° ORBELOWDATETEMP.24° ORBELOWDATETEMP.28° ORBELOWDATETEMP.32° ORBELOWDATETEMP.32° ORBELOWDATETEMP.28° ORBELOWDATETEMP.24° ORBELOWDATETEMP.20° ORBELOWDATETEMP.16° ORBELOWNUMBER OF DAYSBETWEEN DATES16° OR BELOW20° OR BELOW24° OR BELOW28° OR BELOW32° OR BELOW18WFO PUEBLO105 06/27 -4 01/01 03/12 14 04/04 19 04/07 21 04/19 28 04/27 29 10/14 24 10/14 24 10/14 24 10/15 18 11/10 15 243 194 190 178 170WILD HORSE 6N103 06/29 -10 01/16 04/08 15 04/08 15 04/25 24 04/25 24 04/27 32 10/10 29 10/14 25 10/15 14 10/15 14 10/15 14 190 190 173 172 166COLORADO DRAINAGE BASIN 02ALTENBERN99 07/21 -2 12/29 03/07 16 04/18 17 04/18 17 04/25 26 04/27 30 10/13 28 10/13 28 10/15 18 10/15 18 11/07 15 245 180 180 171 169ASPEN 1SW87 07/10 -3 12/29 04/19 11 04/19 11 04/25 24 04/26 26 05/05 30 09/25 32 10/13 26 10/15 10 10/15 10 10/15 10 179 179 173 170 143ASPEN ASOS91 07/19 -9 02/21 04/18 11 04/18 11 04/25 23 04/27 27 05/15 31 09/21 32 10/13 24 10/13 24 10/15 16 10/15 16 180 180 171 169 129BLACK CANYON OF THE GUNNISON 93 07/22 2 12/04 04/18 15 04/18 15 04/25 23 05/03 27 05/04 30 10/09 29 10/13 28 10/15 10 10/15 10 10/15 10 180 180 173 163 158BLUE MESA LAKE91 07/25 -12 12/15 04/18 15 04/19 17 05/04 24 05/16 28 05/24 31 09/14 32 09/27 28 10/13 24 10/15 13 10/15 13 180 179 162 134 113BONHAM RSVR78 06/29 -12 12/27 04/25 12 04/25 12 05/04 24 06/03 27 06/12 30 09/24 28 09/24 28 10/24 24 10/31 17 11/04 13 193 189 173 113 104CEDAREDGE 3E94 07/20 5 12/31 03/07 15 03/20 19 04/18 22 04/18 22 04/25 30 10/13 32 10/15 17 10/15 17 10/15 17 11/12 16 250 209 180 180 171CIMARRON95 07/08 -13 01/27 04/25 10 04/25 10 05/28 22 05/31 28 06/12 31 09/13 29 09/21 28 10/13 22 10/15 13 10/15 13 173 173 138 113 93COCHETOPA CREEK90 07/24 -12 12/31 04/18 12 04/26 18 05/05 23 05/24 28 06/04 31 08/29 32 09/21 28 09/27 23 10/13 20 10/15 13 180 170 145 120 86COLLBRAN 1WSW101 07/20 -2 12/29 03/19 16 04/19 19 04/25 23 04/25 23 04/27 29 10/12 32 10/15 18 10/15 18 10/15 18 11/08 16 234 179 173 173 168COLORADO NM103 06/28 11 12/06 02/24 15 03/05 17 04/03 23 04/18 27 04/18 27 10/15 23 10/15 23 10/15 23 11/12 19 11/26 14 275 252 195 180 180CORTEZ98 07/24 1 12/04 03/19 16 03/28 19 04/18 21 04/18 21 04/26 32 10/15 23 10/15 23 10/15 23 11/07 20 11/09 13 235 224 180 180 172CORTEZ ASOS98 07/23 -4 12/04 04/04 16 04/18 17 04/18 17 04/25 28 05/04 30 09/27 30 10/15 22 10/15 22 11/06 19 11/07 16 217 202 180 173 146CRAIG ASOS99 07/08 -20 02/21 04/18 15 04/25 18 04/27 24 04/27 24 06/03 32 09/14 32 09/21 26 10/14 17 10/14 17 10/15 13 180 172 170 147 103CRAIG 4SW96 07/10 -11 12/30 04/19 16 04/19 16 04/26 22 04/27 28 05/03 32 09/25 32 10/06 27 10/14 23 10/15 12 10/15 12 179 179 171 162 145CRESTED BUTTE85 07/23 -24 02/22 04/19 12 04/27 19 05/16 24 06/09 28 06/30 31 07/02 30 09/14 24 09/14 24 09/29 18 10/13 14 177 155 121 97 2DELTA 3E102 06/28 6 01/04 03/07 13 03/20 18 04/18 23 04/18 23 04/25 29 10/13 32 10/15 22 10/15 22 11/06 18 11/07 15 245 231 180 180 171DILLON 1 E83 08/13 -16 02/21 04/26 16 04/27 17 05/25 21 06/25 26 06/30 31 07/01 29 09/14 24 09/14 24 10/13 16 10/13 16 170 169 112 81 1DURANGO ASOS95 07/23 -7 12/29 04/18 15 04/18 15 04/19 21 04/26 27 05/17 32 09/27 30 10/14 28 10/15 21 11/06 18 11/09 9 205 202 179 171 133DURANGO83 06/01 5 01/24 03/20 14 03/21 19 04/16 23 05/02 25 05/14 31 NONE NONE NONE NONE NONE FT LEWIS89 07/23 -6 12/28 04/18 15 04/18 15 04/18 15 04/22 27 05/26 31 10/09 32 10/14 22 10/14 22 11/07 19 11/08 16 204 203 179 175 136FRASER87 07/20 -24 02/21 04/19 15 04/27 18 05/16 24 06/25 27 06/30 32 07/01 27 07/01 27 09/14 21 09/22 19 10/13 16 177 148 121 6 1GATEWAY103 07/08 9 01/04 03/06 16 03/07 18 04/18 24 04/18 24 04/18 24 NONE NONE NONE NONE NONE GLADE PARK 17W96 07/08 -3 12/04 03/19 11 04/14 18 04/14 18 04/19 27 05/03 31 09/26 32 10/15 22 10/15 22 11/07 16 11/07 16 233 207 184 179 146GLENWOOD SPGS #299 07/20 4 12/29 02/22 11 02/27 19 03/07 22 04/18 28 04/19 29 10/11 32 10/15 20 10/15 20 10/15 20 11/09 13 260 230 222 180 175GRAND JUNCTION WFO102 07/19 10 01/23 02/21 16 03/05 19 03/07 22 03/19 25 04/18 31 10/14 32 10/15 28 11/09 23 11/13 19 12/04 16 286 253 247 210 179GRAND JUNCTION REGIONAL AP 102 07/19 7 01/22 03/06 14 03/07 17 03/19 22 04/18 27 04/18 27 10/14 31 10/15 27 11/08 22 11/09 19 12/03 14 272 247 234 180 179GRAND JUNCTION 6 ESE101 07/20 10 01/22 03/05 15 03/06 19 03/20 24 04/18 27 04/18 27 10/15 25 10/15 25 11/08 20 11/08 20 12/04 14 274 247 233 180 180GRAND LAKE 1 NW84 07/21 -16 01/16 04/27 15 04/27 15 05/09 24 05/16 25 06/25 30 07/01 29 09/21 24 09/21 24 10/11 20 10/15 7 171 167 135 128 6GRAND LAKE 6 SSW83 06/28 -14 02/21 04/03 13 04/25 20 04/27 21 05/05 28 05/25 32 09/21 28 09/21 28 10/11 24 10/15 12 10/15 12 195 173 167 139 119GUNNISON 3SW88 06/28 -16 12/30 04/18 11 04/25 18 05/05 24 06/04 27 06/09 31 08/29 32 09/14 27 09/27 23 10/13 18 10/15 11 180 171 145 102 81HAYDEN96 07/09 -9 12/29 04/18 14 04/25 19 04/25 19 04/25 19 06/02 31 09/21 31 09/25 27 10/14 22 10/15 12 10/15 12 180 173 172 153 111IGNACIO 8E57 01/10 -1 01/22 01/31 16 01/31 16 01/31 16 01/31 16 01/31 16 NONE NONE NONE NONE NONE KREMMLING91 08/13 -10 01/16 04/19 16 04/27 19 04/30 24 05/20 28 06/02 31 09/14 30 09/21 24 09/21 24 10/14 17 10/15 11 179 170 144 124 104LAKE CITY 1NNE87 07/09 -12 02/21 04/18 12 04/19 18 05/03 24 05/04 26 06/05 32 09/22 32 10/05 28 10/10 24 10/15 12 10/15 12 180 179 160 154 109LEMON DAM90 06/28 -9 12/30 03/21 14 04/19 20 04/19 20 05/04 28 05/05 31 10/08 32 10/15 19 10/15 19 10/15 19 11/09 16 233 179 179 164 156MANCOS 1SW93 06/27 -8 12/29 03/28 15 03/29 19 04/10 24 05/04 28 05/14 32 09/27 32 10/15 16 10/15 16 10/15 16 10/15 16 201 200 188 164 136MASSADONA99 06/28 -3 02/22 03/07 16 04/18 20 04/19 22 04/26 26 04/26 26 NONE NONE NONE NONE NONE MAYBELL96 07/08 -17 01/23 04/25 16 04/26 20 04/27 21 04/28 26 06/11 31 09/21 27 09/21 27 09/27 24 10/15 11 10/15 11 173 172 153 146 102MEEKER94 07/10 -16 12/29 04/18 16 04/25 17 04/27 23 06/02 28 06/11 31 09/15 30 09/21 28 10/15 13 10/15 13 10/15 13 180 173 171 111 96MEEKER ASOS97 08/12 -14 12/29 04/03 15 04/18 17 04/25 22 04/27 27 05/16 32 09/21 31 09/27 27 10/14 20 10/14 20 10/15 15 195 179 172 153 128MESA VERDE NP95 07/24 -4 02/21 03/05 13 03/20 17 04/14 24 04/18 26 05/03 32 10/15 24 10/15 24 10/15 24 11/12 17 12/04 9 274 237 184 180 165MONTROSE ASOS99 06/27 4 02/21 03/07 15 03/20 19 04/18 23 04/25 28 04/25 28 10/13 32 10/15 22 10/15 22 11/08 19 11/10 16 248 233 180 173 171
TEMPERATURE EXTREMES AND FREEZE DATA (°F)COLORADO2018STATIONLAST SPRING MINIMUM OFFIRST FALL MINIMUM OFHIGHESTDATELOWESTDATEDATETEMP.16° ORBELOWDATETEMP.20° ORBELOWDATETEMP.24° ORBELOWDATETEMP.28° ORBELOWDATETEMP.32° ORBELOWDATETEMP.32° ORBELOWDATETEMP.28° ORBELOWDATETEMP.24° ORBELOWDATETEMP.20° ORBELOWDATETEMP.16° ORBELOWNUMBER OF DAYSBETWEEN DATES16° OR BELOW20° OR BELOW24° OR BELOW28° OR BELOW32° OR BELOW19MONTROSE #2100 06/28 7 02/22 02/25 9 02/27 17 02/27 17 04/19 25 04/26 31 10/15 21 10/15 21 10/15 21 11/08 20 11/13 15 261 254 230 179 172NORTHDALE96 07/24 -6 12/04 04/18 15 04/18 15 04/18 15 04/27 28 05/17 29 09/27 32 10/15 22 10/15 22 11/08 13 11/08 13 204 204 180 171 133NORWOOD #291 07/24 -3 02/20 04/18 12 04/18 12 04/25 23 05/03 27 05/04 29 10/09 29 10/15 17 10/15 17 10/15 17 11/08 15 204 180 173 165 158OURAY #289 07/24 2 12/30 03/07 12 04/14 19 04/19 21 05/03 28 05/05 32 10/13 29 10/15 17 10/15 17 10/15 17 11/09 13 247 184 179 165 161PALISADE101 06/28 14 12/31 03/05 16 03/06 17 03/07 24 03/20 25 04/04 30 10/15 31 11/06 26 11/10 23 12/04 14 12/04 14 274 273 248 231 194PARADOX 2N104 06/28 -2 01/23 03/21 16 04/19 20 04/19 20 04/19 20 04/26 30 10/15 25 10/15 25 10/16 24 11/07 17 11/08 16 232 202 180 179 172PLACERVILLE94 06/28 -3 01/22 04/19 16 04/19 16 05/03 23 05/04 28 05/20 31 10/06 31 10/09 27 10/15 14 10/15 14 10/15 14 179 179 165 158 139RANGELY 1E100 07/20 -2 12/29 03/08 12 04/19 20 04/19 20 04/19 20 04/26 30 10/11 32 10/14 26 10/15 20 10/15 20 11/08 15 245 179 179 178 168RIDGWAY97 07/24 -7 01/23 04/19 13 04/19 13 04/26 21 05/15 28 05/29 32 09/15 32 09/27 28 10/15 14 10/15 14 10/15 14 179 179 172 135 109RIFLE 3ENE97 07/20 -3 12/30 03/07 16 04/18 20 04/19 21 04/27 28 04/27 28 09/27 31 10/15 18 10/15 18 10/15 18 11/09 14 247 180 179 171 153RIFLE ASOS100 07/22 -3 12/29 02/26 9 03/07 19 04/18 22 04/25 28 04/27 32 10/13 31 10/14 28 10/15 21 11/08 19 11/09 16 256 246 180 172 169SARGENTS93 06/27 -26 02/20 04/26 16 06/01 20 06/24 24 06/30 28 06/30 28 07/01 28 07/01 28 08/28 23 09/13 17 09/26 15 153 104 65 1 1SHOSHONE99 07/20 7 12/30 02/27 15 03/07 19 03/08 21 04/20 27 04/20 27 10/16 25 10/16 25 11/09 20 11/09 20 11/26 15 272 247 246 179 179SILVERTON81 08/06 -17 12/04 MSG MSG MSG MSG MSG 07/01 31 09/13 26 09/26 24 10/12 20 10/14 12 STEAMBOAT SPRINGS92 08/13 -13 02/22 04/18 14 04/18 14 04/25 22 04/27 26 06/02 32 09/21 28 09/21 28 10/13 23 10/14 9 10/14 9 179 179 171 147 111TAYLOR PARK81 07/23 -29 01/27 04/19 16 04/27 19 05/05 23 05/21 26 06/12 32 08/29 31 09/14 28 10/13 20 10/13 20 10/15 10 179 169 161 116 78TELLURIDE 4WNW88 08/19 -13 12/04 04/19 16 04/25 18 05/16 24 06/02 26 06/29 32 07/02 31 09/14 27 09/22 21 10/15 12 10/15 12 179 173 129 104 3VAIL85 07/20 -10 02/21 04/03 15 04/26 20 04/27 23 05/15 28 06/28 32 07/01 32 09/21 27 10/14 19 10/14 19 10/16 8 196 171 170 129 3VALLECITO DAM92 07/24 -10 12/30 03/20 11 04/18 17 04/19 21 05/04 28 05/14 31 10/13 30 10/14 26 10/15 19 10/15 19 11/09 13 234 180 179 163 152WILLIAMS FORK DAM90 08/14 -12 02/21 04/04 16 04/25 18 04/27 22 05/05 28 05/24 31 09/21 26 09/21 26 09/25 24 10/15 10 10/15 10 194 173 151 139 120YAMPA92 07/10 -14 12/29 04/19 16 04/26 19 04/27 24 05/14 28 06/11 30 08/20 32 09/21 27 09/25 24 10/15 3 10/15 3 179 172 151 130 70YELLOW JACKET 2W97 07/31 0 12/05 04/14 12 04/21 20 04/22 22 04/26 25 05/25 32 10/09 25 10/09 25 10/12 21 10/19 18 11/01 12 201 181 173 166 137KANSAS DRAINAGE BASIN 03AKRON 4 E103 06/29 -13 01/16 04/07 15 04/15 18 04/25 24 04/25 24 04/25 24 10/10 30 10/14 23 10/14 23 10/15 15 10/15 15 191 183 172 172 168ARAPAHOE 12S104 06/28 -8 01/17 04/08 14 04/15 20 04/19 23 04/25 28 04/28 31 10/10 30 10/14 27 10/15 13 10/15 13 10/15 13 190 183 179 172 165BONNY DAM 2NE MSG MSG MSG MSG MSG NONE NONE NONE NONE NONE BURLINGTON101 07/20 -4 01/16 04/08 13 04/15 19 04/16 22 04/25 28 04/26 30 10/10 29 10/11 27 10/15 16 10/15 16 10/15 16 190 183 182 169 167CHEYENNE WELLS103 06/28 -7 01/01 04/15 16 04/15 16 04/15 16 04/25 28 04/26 30 10/09 32 10/10 25 10/11 22 10/15 11 10/15 11 183 183 179 168 166FLAGLER 1S103 06/28 -9 01/16 03/06 9 03/31 19 04/15 24 04/22 27 04/28 32 10/08 30 10/09 27 10/13 21 10/14 20 11/08 16 247 197 181 170 163FLEMING 3SW104 06/29 -9 02/20 04/09 15 04/15 18 04/16 21 04/23 28 04/27 31 10/05 32 10/11 26 10/15 19 10/15 19 11/10 9 215 183 182 171 161GENOA96 06/29 -7 02/20 04/07 15 04/14 18 04/14 18 04/25 27 04/25 27 10/11 26 10/11 26 10/15 18 10/15 18 11/09 14 216 184 184 169 169HOLYOKE102 06/29 -14 01/16 04/16 16 04/16 16 04/16 16 04/25 27 04/27 31 10/05 28 10/05 28 10/11 24 10/15 16 10/15 16 182 182 178 163 161IDALIA102 06/29 -7 02/20 04/08 12 04/15 17 04/16 21 04/25 28 04/26 29 10/10 29 10/11 26 10/15 12 10/15 12 10/15 12 190 183 182 169 167JOES101 06/29 -7 01/16 04/07 12 04/16 19 04/19 23 04/25 27 04/28 31 10/10 29 10/14 24 10/14 24 10/15 11 10/15 11 191 182 178 172 165KIT CARSON 9NNE103 06/28 -7 01/17 04/09 15 04/09 15 04/18 23 04/20 28 05/05 31 10/10 30 10/14 26 10/16 15 10/16 15 10/16 15 190 190 181 177 158LEROY 5 WSW101 06/29 -11 02/20 04/15 16 04/15 16 04/19 24 04/25 25 04/26 29 10/09 31 10/11 24 10/11 24 10/15 14 10/15 14 183 183 175 169 166SEIBERT99 06/27 -6 01/15 04/07 14 04/14 19 04/15 23 04/25 27 04/25 27 10/08 31 10/09 26 10/13 21 10/14 9 10/14 9 190 183 181 167 166SHAW 4ENE101 07/23 -11 01/16 04/07 15 04/15 19 04/25 22 04/25 22 04/27 31 10/10 28 10/10 28 10/14 22 10/15 4 10/15 4 191 183 172 168 166WRAY103 06/29 -7 01/17 04/08 13 04/16 19 04/16 19 04/25 28 04/27 32 10/05 32 10/11 24 10/11 24 10/15 16 10/15 16 190 182 178 169 161YUMA106 06/29 -4 01/17 04/07 11 04/14 20 04/15 21 04/19 28 04/27 29 10/10 31 10/14 24 10/14 24 10/15 17 11/18 11 225 184 182 178 166PLATTE DRAINAGE BASIN 04ANTERO RSVR85 07/11 -24 12/30 04/27 16 05/05 20 05/16 22 05/30 28 06/25 31 09/10 32 09/14 27 10/10 24 10/13 16 10/13 16 169 161 147 107 77BAILEY89 07/20 -15 02/11 04/25 12 04/26 18 04/27 21 05/05 28 06/25 31 09/14 31 09/21 27 10/11 23 10/14 15 10/14 15 172 171 167 139 81BOULDER98 06/28 -6 02/20 02/24 16 03/11 19 04/07 22 04/25 27 04/25 27 10/10 30 10/14 20 10/14 20 10/14 20 10/15 13 233 217 190 172 168BRIGHTON 3 SE104 06/29 -6 02/21 03/11 16 03/12 19 04/07 23 04/18 26 04/25 29 10/10 32 10/14 21 10/14 21 10/15 19 11/09 16 243 217 190 179 168
TEMPERATURE EXTREMES AND FREEZE DATA (°F)COLORADO2018STATIONLAST SPRING MINIMUM OFFIRST FALL MINIMUM OFHIGHESTDATELOWESTDATEDATETEMP.16° ORBELOWDATETEMP.20° ORBELOWDATETEMP.24° ORBELOWDATETEMP.28° ORBELOWDATETEMP.32° ORBELOWDATETEMP.32° ORBELOWDATETEMP.28° ORBELOWDATETEMP.24° ORBELOWDATETEMP.20° ORBELOWDATETEMP.16° ORBELOWNUMBER OF DAYSBETWEEN DATES16° OR BELOW20° OR BELOW24° OR BELOW28° OR BELOW32° OR BELOW20BUCKHORN MTN 1E92 06/29 -13 02/20 04/07 13 04/07 13 04/25 22 04/26 28 05/04 31 09/25 27 09/25 27 10/10 21 10/11 20 10/14 9 190 187 168 152 144BYERS 5 ENE104 06/29 -8 02/12 03/12 14 04/19 20 04/25 24 04/27 26 04/27 26 10/10 31 10/14 21 10/14 21 10/15 10 10/15 10 217 179 172 170 166CABIN CREEK78 06/28 -6 02/22 04/26 15 04/26 15 04/26 15 05/05 26 05/21 31 09/21 32 10/08 28 10/09 21 10/14 14 10/14 14 171 171 166 156 123CASTLE ROCK95 07/04 -5 02/20 03/06 13 03/20 20 04/25 23 04/25 23 04/25 23 10/10 30 10/14 17 10/14 17 10/14 17 10/15 11 223 208 172 172 168CHEESMAN94 06/28 -4 02/21 03/11 16 03/21 19 04/19 24 04/26 25 05/04 32 10/10 29 10/14 18 10/14 18 10/14 18 10/15 9 218 207 178 171 159COAL CREEK CANYON82 07/22 -12 02/20 04/25 14 04/25 14 04/25 14 04/27 25 05/20 32 09/21 29 09/25 28 10/09 23 10/10 19 10/14 5 172 168 167 151 124CROOK106 06/29 -12 02/21 04/08 14 04/16 20 04/16 20 04/26 27 04/28 32 10/05 30 10/11 25 10/15 15 10/15 15 10/15 15 190 182 182 168 160DENVER INTL AP105 06/28 -7 02/21 03/11 16 03/11 16 04/07 22 04/19 27 04/25 31 10/10 31 10/13 26 10/14 20 10/14 20 11/09 15 243 217 190 177 168DENVER-STAPELTON104 06/29 -3 02/21 03/08 16 03/08 16 04/08 22 04/18 28 04/26 31 10/10 32 10/14 22 10/14 22 10/15 19 12/05 15 272 221 189 179 167DENVER WATER DEPT106 06/29 3 02/21 02/24 13 03/08 20 03/12 24 04/08 25 04/26 31 10/10 32 10/14 22 10/14 22 10/15 19 12/05 16 284 221 216 189 167DIVIDE 4NW85 06/29 -3 12/30 04/26 16 04/26 16 05/05 24 05/05 24 05/21 32 09/26 29 10/06 28 10/10 23 10/14 12 10/14 12 171 171 158 154 128ELIZABETH 7S91 06/14 -9 01/16 03/19 13 04/25 20 04/25 20 04/25 20 04/27 32 NONE NONE NONE NONE NONE ESTES PARK 1 SSE93 06/29 -8 02/21 04/07 16 04/26 19 04/27 22 05/05 27 05/17 31 09/21 32 09/26 26 NONE NONE NONE 144 127EVERGREEN93 06/29 -9 02/21 03/20 16 04/25 20 04/26 22 04/28 26 05/06 30 09/28 30 10/10 28 10/14 9 10/14 9 10/14 9 208 172 171 165 145FAIRPLAY S PARK RD82 06/28 -19 02/21 04/25 12 04/27 18 05/04 22 05/06 27 06/25 31 08/19 32 10/06 27 10/08 22 10/11 19 10/14 14 172 167 157 153 55FT COLLINS101 06/28 -3 02/20 03/07 16 04/07 20 04/07 20 04/25 28 04/25 28 10/10 32 10/14 21 10/14 21 10/15 12 10/15 12 222 191 190 172 168FT COLLINS 4 E102 06/28 -9 02/20 03/11 16 04/07 19 04/21 23 04/25 27 04/27 32 10/10 32 10/13 25 10/14 16 10/14 16 10/14 16 217 190 176 171 166FT MORGAN99 09/14 -4 01/16 02/06 13 04/07 17 04/15 21 04/25 26 04/25 26 10/05 32 10/14 23 10/14 23 10/15 15 10/15 15 251 191 182 172 163GEORGETOWN87 06/29 -5 02/21 04/03 15 04/26 19 04/26 19 04/28 28 05/05 31 09/25 29 10/09 25 10/14 12 10/14 12 10/14 12 194 171 171 164 143GOULD 4SE SFSP84 08/13 -20 12/29 04/25 13 04/27 20 06/03 22 06/11 25 06/25 31 07/01 29 09/14 28 09/25 18 09/25 18 10/12 16 170 151 114 95 6GRANT84 07/20 -7 02/22 04/26 16 04/26 16 05/04 24 05/04 24 06/25 30 09/21 30 10/07 27 10/10 24 10/11 19 10/14 13 171 168 159 156 88GREELEY UNC102 06/28 -6 02/20 03/07 11 04/07 19 04/07 19 04/19 28 04/25 31 10/10 32 10/14 20 10/14 20 10/14 20 10/15 13 222 190 190 178 168GROSS RSVR91 06/29 -15 02/21 04/07 16 04/26 19 04/26 19 04/26 19 05/05 30 09/26 32 10/10 26 10/14 15 10/14 15 10/14 15 190 171 171 167 144HOHNHOLZ RCH89 07/11 -20 02/21 04/27 14 04/28 19 05/15 23 06/03 26 06/25 31 07/01 30 08/20 28 09/21 21 09/26 16 09/26 16 152 151 129 78 6HOURGLASS RSVR87 07/11 -15 02/21 04/20 13 05/03 20 05/04 23 05/15 27 06/23 32 07/01 31 08/24 28 09/26 23 10/10 19 10/11 12 174 160 145 101 8JULESBURG98 06/29 -13 01/03 04/16 16 04/16 16 04/17 24 04/26 28 04/28 32 10/05 32 10/11 26 10/15 16 10/15 16 10/15 16 182 182 181 168 160KASSLER103 06/29 -7 02/21 03/12 15 03/13 19 04/14 24 04/25 26 04/26 30 09/29 32 10/14 20 10/14 20 10/14 20 11/10 15 243 215 183 172 156LAKE GEORGE 8 SW88 06/29 -13 01/23 04/18 16 04/26 17 04/27 24 05/05 27 05/10 32 09/26 32 10/10 27 10/13 23 10/14 15 10/14 15 179 171 169 158 139LAKEWOOD100 06/29 0 02/21 02/25 16 03/07 17 04/07 22 04/08 25 04/25 29 10/10 30 10/14 20 10/14 20 10/14 20 10/15 15 232 221 190 189 168LINDON 5 WNW105 06/29 -12 01/16 03/17 15 04/26 19 04/26 19 04/27 28 04/27 28 09/28 32 10/14 23 10/14 23 10/15 3 10/15 3 212 172 171 170 154LONGMONT 2 ESE102 06/28 -6 01/17 02/24 11 03/12 20 04/08 24 04/08 24 04/26 32 10/11 32 10/14 21 10/14 21 10/15 14 10/15 14 233 217 189 189 168LOVELAND 2N103 06/29 -10 02/20 03/12 15 03/13 17 04/20 24 04/28 28 04/28 28 10/10 32 10/14 21 10/14 21 10/15 11 10/15 11 217 216 177 169 165MARSTON FLTR PLT100 06/29 0 02/20 02/25 16 03/07 18 04/07 24 04/08 28 04/29 29 10/10 31 10/14 23 10/14 23 10/15 16 10/15 16 232 222 190 189 164NEW RAYMER 21 N102 06/29 -14 02/21 04/08 16 04/14 20 04/26 24 04/26 24 04/26 24 09/26 32 11/03 18 11/03 18 11/03 18 11/06 15 212 203 191 191 153NORTHGLENN105 06/29 -1 01/16 02/26 16 03/12 19 04/08 24 04/08 24 04/25 31 10/15 21 10/15 21 10/15 21 11/09 20 11/12 16 259 242 190 190 173RALSTON RSVR98 07/22 1 01/16 03/07 16 04/07 20 04/08 21 04/25 28 04/26 32 10/10 29 10/14 17 10/14 17 10/14 17 11/12 12 250 190 189 172 167ROXBOROUGH SP98 06/29 -5 02/20 03/11 16 04/18 20 04/25 24 04/25 24 05/04 32 09/28 32 10/10 28 10/14 18 10/14 18 10/15 11 218 179 172 168 147RUSTIC 9WSW86 07/12 -10 02/21 04/19 16 04/20 19 04/25 23 05/01 26 06/12 32 09/21 32 09/26 27 10/10 23 10/11 17 10/14 13 178 174 168 148 101SEDGWICK 5 S103 06/15 -9 01/02 04/15 13 04/15 13 04/16 22 04/25 27 04/25 27 10/05 31 10/11 23 10/11 23 10/15 13 10/15 13 183 183 178 169 163STRONTIA SPRINGS DAM97 06/28 -5 02/21 03/22 15 04/18 20 04/20 22 04/26 28 05/04 31 10/07 30 10/12 28 10/14 21 10/15 13 10/15 13 207 180 177 169 156VIRGINIA DALE 7 ENE97 06/29 -14 02/20 04/07 14 04/25 20 04/25 20 04/28 27 05/15 32 09/26 28 09/26 28 10/10 24 10/14 12 10/14 12 190 172 168 151 134WALDEN88 07/11 -18 02/20 04/27 14 04/28 18 05/15 24 06/03 28 06/25 31 07/01 28 07/01 28 09/02 24 09/21 15 09/21 15 147 146 110 28 6WATERDALE101 06/29 -12 02/20 03/12 15 04/05 19 04/19 21 04/25 25 04/28 31 10/10 30 10/18 27 11/06 22 11/08 18 11/09 13 242 217 201 176 165WHEAT RIDGE 2102 06/29 -2 02/21 03/07 16 03/12 20 04/08 24 04/08 24 04/26 30 10/10 31 10/14 21 10/14 21 10/15 15 10/15 15 222 217 189 189 167RIO GRANDE DRAINAGE BASIN 05ALAMOSA 1E92 06/28 -13 12/30 03/22 10 04/19 18 05/03 24 05/05 28 06/03 32 09/26 30 10/06 27 10/13 23 10/15 13 10/15 13 207 179 163 154 115
TEMPERATURE EXTREMES AND FREEZE DATA (°F)COLORADO2018STATIONLAST SPRING MINIMUM OFFIRST FALL MINIMUM OFHIGHESTDATELOWESTDATEDATETEMP.16° ORBELOWDATETEMP.20° ORBELOWDATETEMP.24° ORBELOWDATETEMP.28° ORBELOWDATETEMP.32° ORBELOWDATETEMP.32° ORBELOWDATETEMP.28° ORBELOWDATETEMP.24° ORBELOWDATETEMP.20° ORBELOWDATETEMP.16° ORBELOWNUMBER OF DAYSBETWEEN DATES16° OR BELOW20° OR BELOW24° OR BELOW28° OR BELOW32° OR BELOW21ALAMOSA-BERGMAN FIELD91 07/22 -14 12/30 04/18 13 04/25 20 05/03 22 05/16 27 06/02 29 09/14 28 09/14 28 10/13 19 10/13 19 10/14 15 179 171 163 121 104CREEDE WTP87 07/20 -21 02/21 04/19 12 05/05 20 05/23 24 06/11 28 06/25 31 07/02 31 09/21 26 09/27 20 09/27 20 NONE 145 127 102 7CRESTONE 2 SE94 07/20 -6 12/30 04/18 14 04/18 14 04/25 23 05/03 28 05/04 31 10/06 30 10/13 27 10/14 22 10/15 14 10/15 14 180 180 172 163 155DEL NORTE 3ENE90 06/29 -3 12/30 03/30 14 04/19 19 04/26 24 05/03 28 05/05 31 10/05 32 10/13 28 10/15 17 10/15 17 11/07 16 222 179 172 163 153GREAT SAND DUNES NP & PRESERVE 90 07/23 1 01/23 03/19 13 04/18 20 04/18 20 04/25 26 05/04 32 10/13 30 10/14 24 10/14 24 11/07 19 11/09 14 235 203 179 172 162HERMIT 8 SE88 06/27 -21 02/21 04/19 12 04/19 12 06/03 24 06/10 28 06/26 32 07/01 32 09/12 28 09/14 23 10/15 13 10/15 13 179 179 103 94 5MONTE VISTA 2W89 06/29 -17 12/30 04/19 13 04/25 19 05/03 21 05/05 26 06/02 31 09/14 32 09/27 24 09/27 24 10/15 7 10/15 7 179 173 147 145 104RIO GRANDE RSVR85 07/19 -23 02/20 04/18 13 05/03 19 05/04 23 05/22 28 06/04 31 09/13 29 09/20 28 10/08 23 10/14 10 10/14 10 179 164 157 121 101SANTA MARIA RSVR80 07/20 -18 02/21 04/19 10 05/03 17 05/15 24 06/04 28 06/25 31 08/11 32 09/14 28 10/09 21 10/13 20 10/15 8 179 163 147 102 47WAVERLY 1W87 06/29 -17 12/30 04/18 15 04/19 18 05/03 24 05/04 27 05/26 31 09/14 32 09/27 28 10/13 23 10/15 11 10/15 11 180 179 163 146 111
MONTHLY AND SEASONAL COOLING DEGREE DAYSBASE = 65 DEGREES FAHENHEITCOLORADO2018STATIONJAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC TOTALSEASONALNORM22COLORADOARKANSAS DRAINAGE BASIN 01BLACK FOREST 6WNW0 0 0 0 17 175 183 119 128 2 0 0 624 BUENA VISTA 2S0 0 0 0 0 46 121 35 2 0 0 0 204 72CAMPO 7 S0 0 0 7 138 331 369 254 139 16 0 0 1254 1088CANON CITY0 0 0 0 46 230 320 173 144 6 0 0 919 786CHERAW 1 N0 0 0 0 128E 355 384 291 160 12 0 0 1330E CLIMAX0 0 0 0 0 0 0 0 0 0 0 00 0COLORADO SPGS MUNI AP0 0 0 0 30 197 241 143 112 7 0 0 730 404CUMBRE VISTA - COLORADO SPGS 1- - 0 0 6 97 124 60 38 0 0 0 -CRIPPLE CREEK 3NNW0 0 0 0 - - 41E 0 0 0 0 0 -EADS0 0 0 1 106 327 374 228 158 8 0 0 1202 872EASTONVILLE 2 NNW0 0 0 0 0 30 71 19 4 0 0 0 124 ELLICOTT 7S0 0 0 3 107 195 333 246 98 6 0 0 988 FLORISSANT FOSSIL BED0 0 0 0 0 0 4 0 0 0 0 04 3GUFFEY 9SE0 0 0 0 0 48 50 3 15 0 0 0 116 HOLLY0 0 0 4 131 351 395 246 186 11 0 0 1324 1147HUGO 1 NW0 0 0 0 40E 209 265 143E 102E 4 0 0 763E JOHN MARTIN DAM0 0 0 10 171 416 481E 317 220E 13 0 0 1628E 1090KARVAL0 0 0 3 44E 241E 266E 140E 104 7 0 0 805E 642KIM 15 NNE0 0 0 4 108 350 367 238 165 15 0 0 1247 713KIM 10SSE0 0 0 0 113 248 295 195 96 15 0 0 962 537KIT CARSON- - - - - - - - - - - -LA JUNTA MUNICIPAL AP0 0 0 19E 177 436 459E 332 196 18 0 0 1637E 1199LA JUNTA0 0 0 7 115 363 412 262 169 10 0 0 1338 LA JUNTA 20 S0 0 0 2 136 362 417 275 179 10 0 0 1381 1256LAMAR0 0 0 5 142 387 421 279 194 12 0 0 1440 1088LAS ANIMAS0 0 0 11 175 422 479 325 208 14 0 0 1634 1218MONUMENT 3S0 0 0 0 4 116 142 73 60 0 0 0 395 ORDWAY 2 ENE0 0 0 6 100 339E 411 281 173 0 0 0 1310E 1050PUEBLO MEM AP0 0 0 6 131 356 439 288 183 16 0 0 1419 922PUEBLO RSVR0 0 0 5 112 356 419 271 185 9 0 0 1357 997ROCKY FORD 2 SE0 0 0 13 135 408E 375 242 146 15 0 0 1334E 1054RUXTON PARK0 0 0 0 0 6 5 0 0 0 0 011 0RYE 1SW0 0 0 2 48 215 226 112 101 9 0 0 713 SHEEP MTN0 0 0 0 1 - 93E - 27 0 0 -SHERIDAN LAKE 4E0 0 0 0 64 290E 365 236 159 13E 0 0 1127E SUGARLOAF RSVR0 0 0 0 0 0 0 0 0 0 0 00 0TACONY 13 SE0 0 0 3 105 308 364 212 139 11 0 0 1142 842TRINIDAD0 0 0 15 99 329 366 229 128 18 0 0 1184 653TRINIDAD AP0 0 0 4 82 307 375 243 139 14 0 0 1164 730TRINIDAD LAKE0 0 0 0 34 183 233 127 46 4 0 0 627 353TWIN LAKES RSVR0 0 0 0 0 0 0 0 0 0 0 00 11WALSENBURG 1 NW0 0 0 6 40 243 291 169 140 13 0 0 902 515WALSH 1 W0 0 0 8 153 390 421 286 175 16 0 0 1449 1056WESTCLIFFE0 0 0 0 2 15 58 8 2 3 0 088 23WFO PUEBLO0 0 0 7 119 337 407 263 162 14 0 0 1309 WILD HORSE 6N0 0 0 1E 49E 272E 326E 171E 125E 12E 0 0 956E COLORADO DRAINAGE BASIN 02ALTENBERN0 0 0 0 0 114 300 158 26 0 0 0 598 345ASPEN 1SW0 0 0 0 0 6 36 9 0 0 0 051 35ASPEN ASOS0 0 0 0 0 18 126 34 1 0 0 0 179
MONTHLY AND SEASONAL COOLING DEGREE DAYSBASE = 65 DEGREES FAHENHEITCOLORADO2018STATIONJAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC TOTALSEASONALNORM23BLACK CANYON OF THE GUNNISON0 0 0 0 0 40 180 110 20 0 0 0 350 BLUE MESA LAKE0 0 0 0 0 11 120 32 0 0 0 0 163 92BONHAM RSVR0 0 0 0 0 0 0 0 0 0 0 00 CEDAREDGE 3E0 0 0 0 15 193 333 235 89 2 0 0 867 CIMARRON0 0 0 0 0 9 119 87E 1E 0 0 0 216E 83COCHETOPA CREEK0 0 0 0 0 2E 28 0 0 0 0 030E 31COLLBRAN 1WSW0 0 0 0 6 146 338 216 79 2 0 0 787 COLORADO NM0 0 0 3 103E 360 537E 410E 223 7 0 0 1643E 1046CORTEZ0 0 0 0 18 158 357 260 73 1 0 0 867 446CORTEZ ASOS0 0 0 0 6 101 300 193 24 0 0 0 624 CRAIG ASOS0 0 0 0 0 26 216 78 7 0 0 0 327 CRAIG 4SW0 0 0 0 0 50 218E 88 15 0 0 0 371E 209CRESTED BUTTE0 0 0 0 0 0 5 1 0 0 0 06 0DELTA 3E0 0 0 0 36E 239E 401 249 95 9E 0 0 1029E DILLON 1 E0 0 0 0 0 0 0 0 0 0 0 00 0DURANGO ASOS0 0 0 0 0 45 227 123 6 0 0 0 401 DURANGO0 0 0 0 0 - - - - - - -FT LEWIS0 0 0 0 0 21 121 74 1 0 0 0 217 113FRASER0 0 0 0 0 0 0 0 0 0 0 00 FRUITA- - 0 86 156 251E 476 382E 161 6 0 0 -GATEWAY 1ENE0 0 0 8 88 328 544 429 214 11E 0 0 1622E 1083GLADE PARK 17W0 0 0 2 11 134 284 222 59 0 0 0 712 GLENWOOD SPGS #20 0 0 0 17E 182 363 180 49 1 0 0 792E 446GRAND JUNCTION WFO0 0 0 3 113 401 588 443 244 3 0 0 1795 GRAND JUNCTION REGIONAL AP0 0 0 2 84 349 547 408 223 3 0 0 1616 1091GRAND JUNCTION 6 ESE0 0 0 3E 107 378 537E 405 217 9 0 0 1656E 1098GRAND LAKE 1 NW0 0 0 0 0 6 0 0 0 0 0 06 6GRAND LAKE 6 SSW0 0 0 0 0 0 2 0 0 0 0 02 1GUNNISON 3SW0 0 0 0 0 2 44 1 0 0 0 047 26HAYDEN0 0 0 0 0 20 179 75 7 0 0 0 281 214IGNACIO 6ESE0 0 0 0 0 49 217 104 7 0 0 0 377 KREMMLING0 0 0 0 0 5E 55 3 0 0 0 063E 29LAKE CITY 1NNE0 0 0 0 0 7 21 2 0 0 0 030 LEMON DAM0 0 0 0 0 16 46 22 0 0 0 084 26MANCOS 1SW0 0 0 0 0 26 152 78 5 0 0 0 261 MASSADONA0 0 0 2 19 211E - - - - - -MAYBELL0 0 0 0 0 60E 192 54 2 0 0 0 308E 168MEEKER0 0 0 0 0 16 94 25 0 0 0 0 135 MEEKER ASOS0 0 0 0 0 52 233 101 9 0 0 0 395 MESA VERDE NP0 0 0 0 21 187 322 240 63 0 0 0 833 412MONTROSE ASOS0 0 0 0 32 207 378 247 96 1 0 0 961 MONTROSE #20 0 0 4 47 275 425 302 129 8 0 0 1190 528NORTHDALE0 0 0 0 0 50 239 141 8 0 0 0 438 253NORWOOD #20 0 0 0 0 65 166 101 26 0 0 0 358 OURAY #20 0 0 0 0 52 126 69 13 0 0 0 260 PALISADE0 0 0 3 92 369 498 387 175 4 0 0 1528 1224PARADOX 2N0 0 0 0 29 237 434 332 129 4 0 0 1165 PLACERVILLE0 0 0 0 0 52E 121 75E 7E 0 0 0 255E RANGELY 1E0 0 0 0 14 210 410E 243 96 0 0 0 973E 638RIDGWAY0 0 0 0 0 19 155 56 0 0 0 0 230 59RIFLE 3ENE0 0 0 0 4 103 267 119 12 0 0 0 505 RIFLE ASOS0 0 0 0 18 180 403 237 85 0 0 0 923 SARGENTS0 0 0 0 0 0 4 0 0 0 0 04 SHOSHONE0 0 0 0 27E 204 417 254 115 3 0 0 1020E
MONTHLY AND SEASONAL COOLING DEGREE DAYSBASE = 65 DEGREES FAHENHEITCOLORADO2018STATIONJAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC TOTALSEASONALNORM24SILVERTON0 0 0 0 0 0 0 0 0 0 0 00 0STEAMBOAT SPRINGS0 0 0 0 0 13 105 33E 0 0 0 0 151E 60TAYLOR PARK0 0 0 0 0 0 0 0 0 0 0 00 0TELLURIDE 4WNW0 0 0 0 0 1 5E 3E 0 0 0 09E 3VAIL0 0 0 0 0 0 4 0 0 0 0 04 0VALLECITO DAM0 0 0 0 0 22 87 42 0 0 0 0 151 131WILLIAMS FORK DAM0 0 0 0 0 2 33 6 0 0 0 041 14YAMPA0 0 0 0 0 12 67 15 1 0 0 095 15YELLOW JACKET 2W0 0 0 1E 0 102E 169 10E 23E 0 0 0 305E 440KANSAS DRAINAGE BASIN 03AKRON 4 E0 0 0 2 58 220 301 211 140 3 0 0 935 628ARAPAHOE 12S0 0 0 3 96 311 356 283 133 8 0 0 1190 BONNY DAM 2NE- - - - - - - - - - - -BURLINGTON0 0 0 1 69 249E 310 226 143 3 0 0 1001E 779CHEYENNE WELLS0 0 0 6 80 261E 276E 253 173E 9 0 0 1058E 965FLAGLER 1S0 0 0 0 60E 228 288E 168 110E 12E 0 0 866E 581FLEMING 3SW0 0 0 1 56 216 334 202 135 3 0 0 947 GENOA0 0 0 0 40 218E 231E 244 173 21E 0 0 927E HOLYOKE0 0 0 0 41 196 279 181 93 0 0 0 790 801IDALIA0 0 0 0 58 225E 318 191E 107E 0 0 0 899E 707JOES0 0 0 5 61E 240 305E 207E 135 1E 0 0 954E 702KIT CARSON 9NNE0 0 0 0 77E 254E 355E 207E 144E 2E 0 0 1039E LEROY 5 WSW0 0 0 0 39 183E 247 137 42 0 0 0 648E 718SEIBERT0 0 0 0 59 226 262 207 - 6 0 0 -SHAW 4ENE0 0 0 3 39 205 277 169 107 1 0 0 801 WRAY0 0 0 5 79 252 332 215 145 0 0 0 1028 875YUMA0 0 0 6E 76 275 360 256E 168E 0 0 0 1141E PLATTE DRAINAGE BASIN 04ANTERO RSVR0 0 0 0 0 1 1 0 0 0 0 02 0BAILEY0 0 0 0 0 2 17 3 0 0 0 022 12BOULDER0 0 0 0 14 165 241 195 110 8 0 0 733 552BRIGGSDALE- - - - - - 225E 131 82E 0 0 0 -BRIGHTON 3 SE0 0 0 0 44 224 307 216E 115 3 0 0 909E 569BUCKHORN MTN 1E0 0 0 0 6 89 118 79 67 0 0 0 359 231BYERS 5 ENE0 0 0 0 40E 182 291 160 94 0 0 0 767E 666CABIN CREEK0 0 0 0 0 0 0 0 0 0 0 00 0CASTLE ROCK0 0 0 1 - - 247 129E 95 1 0 0 -CHEESMAN0 0 0 0 6E 104E 160 72 26 0 0 0 368E 88COAL CREEK CANYON0 0 0 0 0 1 15 1 0 0 0 017 CROOK0 0 0 2 58 213 320 203 135 0 0 0 931 DENVER INTL AP0 0 0 2 46 241 326 247 160 4 0 0 1026 DENVER-STAPELTON0 0 0 0 48 266 322 220 129 3 0 0 988 696DENVER WATER DEPT0 0 0 5E 71 316E 388 320E 190E 7E 0 0 1297E DIVIDE 4NW0 0 0 0 0 5 7 0 0 0 0 012 ELIZABETH 7S0 0 0 0 5 112E - - - - - -ESTES PARK 3 SSE0 0 0 0 0 33 58 13 11 1 0 0 116 EVERGREEN0 0 0 0 0 19 69E 18E 2 0 0 0 108E 82FAIRPLAY S PARK RD0 0 0 0 0 0 0 0 0 0 0 00 FT COLLINS0 0 0 0 23 183 261 179 86 2 0 0 734 497FT COLLINS 4 E0 0 0 0 22 170 267 171 80 0 0 0 710 FT MORGAN0 0 - 0 67E - - - 106 0 0 0 -GEORGETOWN0 0 0 0 0 16 43 5E 1 0 0 065E GOULD 4SE SFSP0 0 0 0 0 0 0 0 0 0 0 00
MONTHLY AND SEASONAL COOLING DEGREE DAYSBASE = 65 DEGREES FAHENHEITCOLORADO2018STATIONJAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC TOTALSEASONALNORM25GRANT0 0 0 0 0 0 1 0 0 0 0 01 4GREELEY UNC0 0 0 0 59 237 310 236 155 4 0 0 1001 759GROSS RSVR0 0 0 0 0 23E 67 13 1E 0 0 0 104E HOHNHOLZ RCH0 0 0 0 0 0 17E 0 0 0 - -HOURGLASS RSVR0 0 0 0 0 0 7 0 0 0 0 07 6JULESBURG0 0 0 0 56 214 284 185 121 0 0 0 860 959KASSLER0 0 0 0 33 192E 266 193 122 4 0 0 810E 644LAKE GEORGE 8 SW0 0 0 0 0 3 20E 0 0 0 0 023E 11LAKEWOOD0 0 0 0 22E 206 272 185E 104 3E 0 0 792E 435LINDON 5 WNW0 0 0 1 35 201 352 180 133 3 0 0 905 576LONGMONT 2 ESE0 0 0 0 39E 207 296 190E 109 1E 0 0 842E 587LOVELAND 2N0 0 0 0 20 170 242 167 80 2 0 0 681 524MARSTON FLTR PLT0 0 0 0 28 191E 283E 171 92E 3 0 0 768E NEW RAYMER 21 N0 0 0 0 24 153 303E - 104E - 0 0 -NORTHGLENN0 0 0 0 59E 270E 344 248E 153E 4E 0 0 1078E 590RALSTON RSVR0 0 0 0 27 189 250E 189E 133E 2E 0 0 790E ROXBOROUGH SP0 0 0 0 12E 121E 219E 168E 113E 1E 0 0 634E RUSTIC 9WSW0 0 0 0 0 4 27E 6 0 0 0 037E SEDGWICK 5 S0 0 0 0 47E 212 264 201 125 2 0 0 851E 874STRONTIA SPRINGS DAM0 0 0 0 4 84 175 92 44 0 0 0 399 294VIRGINIA DALE 7 ENE0 0 0 0 1 36 82 26 21 0 0 0 166 WALDEN0 0 0 0 0 0 0 0 0 0 0 00 11WATERDALE0 0 0 0 13 117 193 116 84 1E 0 0 524E 440WHEAT RIDGE 20 0 0 0 31 196 278 179 84 3 0 0 771 496RIO GRANDE DRAINAGE BASIN 05ALAMOSA 1E0 0 0 0 0 29 94 17 0 0 0 0 140 ALAMOSA-BERGMAN FIELD0 0 0 0 0 13 82 9 0 0 0 0 104 44CREEDE WTP0 0 0 0 0 0 2E 5E 0 - 0 -CRESTONE 2 SE0 0 0 0 0 57 96 34 3 0 0 0 190 147DEL NORTE 3ENE0 0 0 0 0 37 87 18 0 0 0 0 142 41GREAT SAND DUNES NP & PRESERVE0 0 0 0 0 87 107 32 8 0 0 0 234 111HERMIT 8 SE0 0 0 0 0 0 0 0 0 0 0 00 0MONTE VISTA 2W0 0 0 0 0 10 37 3 0 0 0 050 71RIO GRANDE RSVR0 0 0 0 0 0 1 0 0 0 0 01 0SANTA MARIA RSVR0 0 0 0 0 0 0 0 0 0 0 00 WAVERLY 1W0 0 0 0 0 7 34 5 0 0 0 046
TOTAL PAN EVAPORATION AND WIND MOVEMENTCOLORADO2018STATIONJAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANNUAL26COLORADOARKANSAS DRAINAGE BASIN 01ELLICOTT 7SWIND- - - - - - - - - - - - - EVAP- - - - 11.66E 14.95 11.33 10.12 9.11E - - - - MAX TEMP - - - - - - - - - - - - - MIN TEMP - - - - - - - - - - - - -JOHN MARTIN DAMWIND- - - - - - - - - - - - - EVAP2.48 3.51 6.15 11.12 11.41 15.00 14.87E 11.90 11.56 6.19E 3.15E 2.51E 99.85E MAX TEMP - - - - - - - - - - - - - MIN TEMP - - - - - - - - - - - - -PUEBLO MEM APWIND- - - - - - - - - - - - - EVAP- - - - - - - - - - - - - MAX TEMP - - - - - - - - - - - - - MIN TEMP - - - - - - - - - - - - -PUEBLO RSVRWIND- - - - - - - - - - - - - EVAP- - - 9.34 12.27 15.51 13.76 11.08 10.22E 4.83E - - - MAX TEMP - - - - - - - - - - - - - MIN TEMP - - - - - - - - - - - - -SUGARLOAF RSVRWIND- - - - - - - - - - - - - EVAP- - - - 6.23E 9.19E 6.11E 5.45 5.46E - - - - MAX TEMP - - - - - - - - - - - - - MIN TEMP - - - - - - - - - - - - -TRINIDAD LAKEWIND- - - - - - - - - - - - - EVAP2.47 3.05 4.67 7.58 10.47 12.44 10.84 8.69 8.03 5.30 3.30 2.21 79.05 MAX TEMP - - - 63.3 75.9 84.1 85.0 83.4 78.3 60.8 - - - MIN TEMP - - - 37.8 47.7 52.8 58.4 56.0 50.0 41.5 - - -TWIN LAKES RSVRWIND- - - - - - - - - - - - - EVAP- - - - 6.89E 9.43E 6.36E 5.67 6.16E - - - - MAX TEMP - - - - - - - - - - - - - MIN TEMP - - - - - - - - - - - - -WALSH 1 WWIND 2774 3201 3936 4456 4083 4350 3370 2561 3359 3407 2728 2770 40995 EVAP- - - - 12.88E 15.44E 13.44E 9.52E 8.73E - - - - MAX TEMP - - - - - - - - - - - - - MIN TEMP - - - - - - - - - - - - -COLORADO DRAINAGE BASIN 02GRAND JUNCTION 6 ESEWIND- 1697E - 3044E 2439E 2383E 2445E 1902E - 1555E 1237E - - EVAP- - - - 14.56E 19.56E - - - - - - - MAX TEMP - - - 71.2 78.8 90.1 93.1 88.0 82.7 63.8 56.0 - - MIN TEMP - - - 41.4 50.6 59.8 63.5 59.7 54.3 46.2 35.0 - -GRAND LAKE 6 SSWWIND- - - - 2411E 2467E 2116E 2416E 2313E 2677E 2653E 1948E - EVAP 0.00E 0.00E - - - - - - - - - - - MAX TEMP - - - - - - - - - - - - - MIN TEMP - - - - - - - - - - - - -VALLECITO DAMWIND- - - - 1360 1130E - - - - - - - EVAP- - - - 8.06 9.33 8.07 7.79 6.40 - - - - MAX TEMP - - - 66.3 71.5 79.2 82.6 79.0 73.5 57.9 - - - MIN TEMP - - - 37.5 40.9 48.4 54.1 51.0 44.4 40.5 - - -KANSAS DRAINAGE BASIN 03
TOTAL PAN EVAPORATION AND WIND MOVEMENTCOLORADO2018STATIONJAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANNUAL27AKRON 4 EWIND 3842 3486 4924 5199 3820 3811 3674 3195 3181 3581 3512 - - EVAP- - - 7.28E 8.34 12.22 12.58 10.49 9.50 4.54 - - - MAX TEMP - - - 64.2 76.4 86.3 87.1 82.9 76.7 57.2 55.0 - - MIN TEMP - - - 34.4 49.7 57.5 61.4 56.3 51.1 39.2 - - -PLATTE DRAINAGE BASIN 04FT COLLINSWIND803 1063 1381E 1230E 655 729E 586 538 605 695E 810 783 9878E EVAP- - - 4.93E 5.22 7.97E 7.38 6.42 5.54 2.70E - - - MAX TEMP - - - - - - - - - - - - - MIN TEMP - - - - - - - - - - - - -
STATION INDEXCOLORADO2018STATIONCOUNTYINDEX NO.DIVISION NO.LATITUDE LONGITUDEELEVATIONFEETYEARS OFRECORDOPENEDOR CLOSEDDURING YRTEMP.PRECIP.EVAP.MONTHOPENEDMONTHCLOSEDSEEREFERENCENOTES28COLORADOAGUILAR 18WSW0105 01 LAS ANIMAS37 19 104 57W 86440 21 0 H AKRON 4 E0109 03 WASHINGTON40 9 103 9W 454271 83 44 CH ALAMOSA 1E0128 05 ALAMOSA37 28 105 51W 754014 14 7 H ALAMOSA-BERGMAN FIELD // 0130 05 ALAMOSA37 26 105 52W 753371 71 33 HJALTENBERN0214 02 GARFIELD39 30 108 23W 563761 72 0 H ANTERO RSVR0263 04 PARK38 60 105 54W 892058 58 0 CH ARAPAHOE0304 03 CHEYENNE38 51 102 11W 40200 28 0 CH ARAPAHOE 12S0306 03 CHEYENNE38 41 102 10W 406516 16 0 H ASPEN 1SW0372 02 PITKIN39 11 106 50W 817539 39 0 CH ASPEN ASOS //0373 02 PITKIN39 14 106 52W 772021 21 0 H AVONDALE 1 N0424 01 PUEBLO38 15 104 21W 45050 3 0 H BAILEY0454 04 PARK39 24 105 29W 775282 82 0 H BEULAH (MPEC)5795 01 PUEBLO38 3 104 60W 66270 11 0 H BLACK CANYON OF THE GUNNISON 0754 02MONTROSE38 33 107 41W 815116 16 0 H BLACK FOREST 6WNW0756 01 EL PASO39 2 104 48W 69579 9 0 H BLUE MESA LAKE //0797 02 GUNNISON38 28 107 10W 756837 52 0 H BONHAM RSVR //0825 02 MESA39 6 107 54W 985223 50 0 H BONNY DAM 2NE0834 03 YUMA39 39 102 7W 371769 69 50 CH BOONE 9NNW0839 01 PUEBLO38 22 104 18W 47940 17 0 H BOULDER0848 04 BOULDER39 60 105 16W 5484 125 125 0 H BRECKENRIDGE0909 02 SUMMIT39 29 106 3W 959823 93 0 H BRIGGSDALE0945 04 WELD40 38 104 20W 486250 53 0 H BRIGHTON 3 SE0950 04 ADAMS39 57 104 50W 501646 46 0 H BUCKHORN MTN 1E1060 04 LARIMER40 37 105 18W 740031 31 0 H BUENA VISTA 2S1071 01 CHAFFEE38 49 106 8W 7946 114 120 0 H BURLINGTON1121 03 KIT CARSON39 18 102 16W 4162 116 116 0 H BYERS 5 ENE1179 04 ADAMS39 44 104 8W 510189 97 0 CH CABIN CREEK1186 04 CLEAR CREEK39 39 105 43W 1002051 51 0 H CAMPO 7 S1268 01 BACA37 1 102 33W 410545 65 0 H CANON CITY1294 01 FREMONT38 28 105 14W 5378 126 126 0 H CASTLE ROCK1401 04 DOUGLAS39 25 104 54W 618593 97 0 CH CEDAREDGE 3E1443 02 DELTA38 54 107 53W 683823 23 0 CH CHEESMAN1528 04 JEFFERSON39 13 105 17W 6880 117 117 0 H CHERAW 1 N1539 01 OTERO38 7 103 31W 414725 29 0 CH CHEYENNE WELLS1564 03 CHEYENNE38 49 102 21W 4295 122 124 0 H CIMARRON1609 02 MONTROSE38 27 107 33W 701168 68 0 H CLIMAX1660 01 LAKE39 22 106 11W 1134470 74 13 H COAL CREEK CANYON1681 04 JEFFERSON39 54 105 23W 895035 35 0 H COCHETOPA CREEK1713 02 GUNNISON38 27 106 46W 800272 80 0 CH COLLBRAN 1WSW1743 02 MESA39 14 107 59W 600919 19 0 H COLORADO NM1772 02 MESA39 6 108 44W 578179 79 0 H COLORADO SPGS MUNI AP // 1778 01 EL PASO38 49 104 41W 618171 71 0 HJCOLORADO SPRINGS AP SNOW 1777 01 EL PASO38 49 104 42W 61670 0 0
STATION INDEXCOLORADO2018STATIONCOUNTYINDEX NO.DIVISION NO.LATITUDE LONGITUDEELEVATIONFEETYEARS OFRECORDOPENEDOR CLOSEDDURING YRTEMP.PRECIP.EVAP.MONTHOPENEDMONTHCLOSEDSEEREFERENCENOTES29COLORADO SPRINGS FS 20 1784 01 EL PASO38 56 104 45W 67180 12 0 H CORTEZ1886 02 MONTEZUMA37 21 108 36W 616796 96 0 H CORTEZ ASOS //1887 02 MONTEZUMA37 18 108 38W 591023 21 0 H CRAIG 4SW1932 02 MOFFAT40 27 107 35W 649642 42 0 H CRAIG ASOS //1931 02 MOFFAT40 30 107 31W 619023 21 0 H CREEDE WTP //1948 05 MINERAL37 50 106 56W 862412 12 0 H CRESTED BUTTE1959 02 GUNNISON38 52 106 59W 8867 109 110 0 CH CRESTONE 2 SE1964 05 SAGUACHE37 59 105 41W 800437 37 0 H CRIPPLE CREEK 3NNW1977 01 TELLER38 48 105 12W 923514 14 0 H CROOK1996 04 LOGAN40 52 102 48W 370923 23 0 H CUMBRE VISTA - COLORADO SPGS 1 1786 01EL PASO38 57 104 43W 69421 1 0 AUG H DEL NORTE 3ENE2184 05 RIO GRANDE37 41 106 18W 7845 101 101 0 H DELTA 3E2196 02 DELTA38 45 108 2W 502719 19 0 H DENVER 1 SW 7NEWS2213 04 DENVER39 44 104 59W 52490 14 0 H DENVER INTL AP R2211 04 DENVER39 50 104 39W 541425 25 0 HJDENVER MUSEUM2228 04 DENVER39 45 104 57W 53076 9 0 H DENVER WATER DEPT2223 04 DENVER39 44 105 0W 522822 22 0 H DENVER-STAPELTON2220 04 DENVER39 46 104 52W 528671 71 0 CH DILLON 1 E2281 02 SUMMIT39 38 106 2W 9065 109 111 0 CH DIVIDE 4NW2294 04 TELLER38 58 105 13W 91348 8 0 H DURANGO2441 02 LA PLATA37 17 107 51W 676128 28 0 JUN H DURANGO ASOS //2433 02 LA PLATA37 9 107 46W 667023 20 0 H EADS2446 01 KIOWA38 29 102 47W 4212 111 111 0 H EASTONVILLE 2 NNW2494 01 EL PASO39 7 104 36W 72109 63 0 H ELIZABETH 7S2632 04 ELBERT39 15 104 37W 67844 4 0 H ELLICOTT 7S2668 01 EL PASO38 44 104 24W 57399 9 9 H ESTES PARK 3 SSE2761 04 LARIMER40 21 105 31W 781218 18 0 H EVERGREEN2790 04 JEFFERSON39 38 105 19W 698558 58 0 CH FAIRPLAY S PARK RD2816 04 PARK39 13 105 60W 999517 17 0 H FLAGLER 1S2932 03 KIT CARSON39 17 103 4W 492171 82 0 H FLATIRON RESERVOIR2934 04 LARIMER40 22 105 14W 55040 23 0 H FLEMING 3SW2947 03 LOGAN40 39 102 52W 425621 21 0 H FLORISSANT FOSSIL BED 2965 01 TELLER38 55 105 17W 840231 30 0 CH FRASER3116 02 GRAND39 57 105 49W 856030 30 0 H FRUITA3146 02 MESA39 9 108 44W 4498 113 114 1 H FT COLLINS3005 04 LARIMER40 35 105 5W 5004 126 126 69 CH FT COLLINS 4 E3006 04 LARIMER40 35 105 1W 492029 29 0 H FT LEWIS3016 02 LA PLATA37 14 108 3W 761495 97 0 H FT MORGAN3038 04 MORGAN40 15 103 52W 4376 119 119 0 H GATEWAY 1ENE3246 02 MESA38 41 108 58W 467163 72 0 H GENOA3258 03 LINCOLN39 17 103 30W 560826 76 0 H GEORGETOWN3261 04 CLEAR CREEK39 42 105 42W 852063 74 0 H GLADE PARK 17W3307 02 MESA38 57 109 3W 632320 20 0 H GLENWOOD SPGS #23359 02 GARFIELD39 31 107 19W 5895 119 122 0 H
STATION INDEXCOLORADO2018STATIONCOUNTYINDEX NO.DIVISION NO.LATITUDE LONGITUDEELEVATIONFEETYEARS OFRECORDOPENEDOR CLOSEDDURING YRTEMP.PRECIP.EVAP.MONTHOPENEDMONTHCLOSEDSEEREFERENCENOTES30GOLDEN 3SW3387 04 JEFFERSON39 43 105 15W 745512 13 0 H GOULD 4SE SFSP3446 04 JACKSON40 31 106 0W 900019 19 0 H GRAND JUNCTION 6 ESE3489 02 MESA39 3 108 28W 476057 57 57 H GRAND JUNCTION REGIONAL AP R 3488 02MESA39 8 108 32W 4858 119 119 13 HJGRAND JUNCTION WFO3486 02 MESA39 7 108 31W 48268 8 0 H GRAND LAKE 1 NW3496 02 GRAND40 16 105 50W 872080 95 0 CH GRAND LAKE 6 SSW3500 02 GRAND40 11 105 52W 828871 71 51 CH GRANT3530 04 PARK39 28 105 41W 867556 56 0 H GREAT SAND DUNES NP & PRESERVE 3541 05ALAMOSA37 44 105 31W 818369 69 0 H GREELEY UNC3553 04 WELD40 24 104 42W 471552 52 0 CH GREEN MT DAM3592 02 SUMMIT39 53 106 20W 774070 80 31 H GROSS RSVR3629 04 BOULDER39 56 105 21W 797018 41 0 H GUFFEY 9SE3652 01 FREMONT38 41 105 24W 891510 12 0 H GUNNISON 3SW3662 02 GUNNISON38 32 106 58W 7622 126 126 0 CH HAYDEN3867 02 ROUTT40 30 107 15W 6467 105 105 0 H HERMIT 8 SE3951 05 MINERAL37 45 107 6W 894999 99 0 H HOHNHOLZ RCH4054 04 LARIMER40 58 106 0W 776034 34 0 H HOLLY4076 01 PROWERS38 3 102 8W 3401 115 121 0 H HOLYOKE4082 03 PHILLIPS40 33 102 20W 3780 113 119 0 CH HOURGLASS RSVR4135 04 LARIMER40 35 105 38W 952031 31 0 H HUGO 1 NW4172 01 LINCOLN39 9 103 29W 502532 44 0 CH IDALIA4242 03 YUMA39 42 102 18W 396534 77 0 H IGNACIO 6ESE4254 02 LA PLATA37 5 107 32W 654818 18 0 H INTER CANYON4293 04 JEFFERSON39 34 105 13W 71800 40 0 CH JOES4380 03 YUMA39 39 102 41W 427537 41 0 CH JOHN MARTIN DAM4388 01 BENT38 4 102 56W 381478 78 48 CH JULESBURG4413 04 SEDGWICK40 59 102 16W 3477 105 108 0 H KARVAL4444 01 LINCOLN38 44 103 33W 507539 78 0 H KASSLER4452 04 JEFFERSON39 29 105 6W 5587 101 101 0 H KIM 10SSE4546 01 LAS ANIMAS37 7 103 18W 525731 31 0 H KIM 15 NNE4538 01 LAS ANIMAS37 27 103 19W 519032 36 0 CH KIT CARSON4603 01 CHEYENNE38 46 102 48W 430278 82 0 H KIT CARSON 9NNE4606 03 CHEYENNE38 53 102 43W 434623 23 0 H KREMMLING4664 02 GRAND40 3 106 22W 746066 66 0 H LA JUNTA4724 01 OTERO37 59 103 33W 419224 24 0 H LA JUNTA 20 S4726 01 OTERO37 45 103 29W 421037 37 0 H LA JUNTA AP PRECIPITATION 4721 01OTERO38 3 103 30W 41890 2 0 H LA JUNTA MUNICIPAL AP R 4720 01 OTERO38 3 103 31W 419474 73 0 H LAKE CITY 1NNE4736 02 HINSDALE38 3 107 18W 87147 7 0 H LAKE GEORGE 8 SW4742 04 PARK38 54 105 28W 855059 63 6 CH LAKEWOOD4762 04 JEFFERSON39 45 105 7W 564057 57 0 H LAMAR4770 01 PROWERS38 6 102 38W 3627 126 126 0 H LAS ANIMAS4834 01 BENT38 4 103 13W 3890 126 126 0 H LEMON DAM4934 02 LA PLATA37 23 107 40W 811037 37 0 H
STATION INDEXCOLORADO2018STATIONCOUNTYINDEX NO.DIVISION NO.LATITUDE LONGITUDEELEVATIONFEETYEARS OFRECORDOPENEDOR CLOSEDDURING YRTEMP.PRECIP.EVAP.MONTHOPENEDMONTHCLOSEDSEEREFERENCENOTES31LEROY 5 WSW4945 03 LOGAN40 31 102 59W 446796 126 0 H LIMON HASS RCH5020 01 ELBERT39 0 103 44W 55040 23 0 H LINDON 5 WNW5025 04 WASHINGTON39 45 103 30W 485131 31 0 H LONGMONT 2 ESE5116 04 BOULDER40 10 105 5W 4950 103 103 0 H LOVELAND 2N5236 04 LARIMER40 26 105 5W 508027 27 0 H MANCOS 1SW5327 02 MONTEZUMA37 20 108 19W 689750 90 0 H MARSTON FLTR PLT5402 04 DENVER39 37 105 4W 561021 24 0 H MASSADONA5420 02 MOFFAT40 15 108 38W 57989 9 0 JUL H MAYBELL5446 02 MOFFAT40 31 108 6W 594457 57 0 H MEEKER5484 02 RIO BLANCO40 2 107 54W 622991 91 0 CH MEEKER ASOS //5485 02 RIO BLANCO40 3 107 53W 636622 21 0 H MESA VERDE NP5531 02 MONTEZUMA37 12 108 29W 714297 97 0 CH MONTE VISTA 2W5706 05 RIO GRANDE37 35 106 11W 769282 82 0 CH MONTROSE #25722 02 MONTROSE38 29 107 53W 5789 119 123 0 H MONTROSE ASOS //5718 02 MONTROSE38 30 107 54W 572023 21 0 H MONUMENT 3S5733 01 EL PASO39 3 104 52W 682110 10 0 H NEW RAYMER 21 N5934 04 WELD40 56 103 52W 518032 32 0 CH NORTHDALE5970 02 DOLORES37 49 109 1W 668178 78 0 CH NORTHGLENN5984 04 ADAMS39 54 105 1W 540735 35 0 H NORWOOD #26013 02 SAN MIGUEL38 8 108 17W 701110 10 0 H ORDWAY 2 ENE //6131 01 CROWLEY38 13 103 43W 431539 104 0 H OURAY #26205 02 OURAY38 2 107 40W 771813 13 0 CH PAGOSA SPRINGS 1SE6258 02 ARCHULETA37 15 106 60W 712982 86 0 H PALISADE6266 02 MESA39 7 108 21W 4751 108 108 0 H PALMER LAKE6280 01 EL PASO39 7 104 55W 720221 28 0 H PAONIA 2SW6308 02 DELTA38 51 107 37W 56510 2 0 APR H PARADOX 2N6320 02 MONTROSE38 23 108 57W 544714 14 0 H PLACERVILLE6520 02 SAN MIGUEL38 1 108 3W 738311 11 0 H PUEBLO MEM AP //6740 01 PUEBLO38 17 104 30W 472065 65 36 HJPUEBLO RSVR6765 01 PUEBLO38 16 104 43W 486144 44 44 H RALSTON RSVR6816 04 JEFFERSON39 50 105 14W 590023 41 0 H RANGELY 1E6832 02 RIO BLANCO40 5 108 46W 527787 87 0 CH RIDGWAY7020 02 OURAY38 9 107 45W 704937 37 0 H RIFLE 3ENE7033 02 GARFIELD39 33 107 44W 546910 10 0 CH RIFLE ASOS //7034 02 GARFIELD39 32 107 43W 552222 21 0 H RIO GRANDE RSVR7050 05 HINSDALE37 43 107 16W 949242 42 0 H ROCKY FORD 2 SE7167 01 OTERO38 2 103 42W 4170 125 125 0 H ROSITA7200 01 CUSTER38 6 105 21W 87500 3 0 H ROXBOROUGH SP7249 04 DOUGLAS39 26 105 4W 611724 24 0 H RUSTIC 9WSW7296 04 LARIMER40 42 105 43W 770026 26 0 CH RUXTON PARK7309 01 EL PASO38 50 104 58W 905060 60 0 H RYE 1SW7317 01 PUEBLO37 55 104 57W 714122 22 0 H SANTA MARIA RSVR7450 05 MINERAL37 49 107 7W 968712 12 0 H SARGENTS7460 02 SAGUACHE38 24 106 25W 84609 64 0 H
STATION INDEXCOLORADO2018STATIONCOUNTYINDEX NO.DIVISION NO.LATITUDE LONGITUDEELEVATIONFEETYEARS OFRECORDOPENEDOR CLOSEDDURING YRTEMP.PRECIP.EVAP.MONTHOPENEDMONTHCLOSEDSEEREFERENCENOTES32SEDALIA 4 SSE7510 04 DOUGLAS39 23 104 57W 60070 63 0 H SEDGWICK 5 S7515 04 SEDGWICK40 52 102 31W 399662 62 0 H SEIBERT7519 03 KIT CARSON39 18 102 52W 470615 20 0 CH SHAW 4ENE7560 03 WASHINGTON39 34 103 18W 500023 23 0 CH SHEEP MTN7572 01 HUERFANO37 43 105 14W 774431 31 0 CH SHERIDAN LAKE 4E7586 01 KIOWA38 28 102 13W 403910 10 0 H SHOSHONE7618 02 GARFIELD39 34 107 14W 599254 105 0 H SILVERTON7656 02 SAN JUAN37 49 107 40W 9285 115 116 0 H STEAMBOAT SPRINGS7936 02 ROUTT40 29 106 49W 6866 117 117 0 H STRONTIA SPRINGS DAM 8022 04 DOUGLAS39 26 105 7W 584035 35 0 H SUGARLOAF RSVR8064 01 LAKE39 15 106 22W 973876 76 69 CH TACONY 13 SE8157 01 PUEBLO38 21 104 3W 488263 63 0 H TAYLOR PARK //8184 02 GUNNISON38 49 106 37W 917979 79 0 CH TELLURIDE 4WNW8204 02 SAN MIGUEL37 57 107 52W 8646 108 108 0 H TOWNER8345 03 KIOWA38 28 102 5W 39280 4 0 H TRINIDAD8429 01 LAS ANIMAS37 11 104 29W 6030 114 117 0 CH TRINIDAD AP //R8434 01 LAS ANIMAS37 16 104 20W 574171 71 0 H TRINIDAD LAKE8436 01 LAS ANIMAS37 9 104 33W 631030 30 30 CH TWIN LAKES RSVR8501 01 LAKE39 6 106 21W 923652 70 40 H VAIL8575 02 EAGLE39 38 106 21W 830434 34 0 H VALLECITO DAM8582 02 LA PLATA37 23 107 35W 764478 78 72 H VERNON 4E8613 03 YUMA39 57 102 15W 38430 13 0 H VIRGINIA DALE 7 ENE8690 04 LARIMER40 58 105 13W 701524 24 0 H WALDEN8756 04 JACKSON40 45 106 17W 805690 90 0 H WALSENBURG 1 NW8781 01 HUERFANO37 38 104 48W 630085 85 0 CH WALSH 1 W8793 01 BACA37 23 102 18W 397852 57 24 H WATERDALE8839 04 LARIMER40 26 105 13W 5230 117 117 0 H WAVERLY 1W8860 05 ALAMOSA37 26 106 2W 760315 15 0 H WESTCLIFFE8931 01 CUSTER38 8 105 28W 7860 115 115 0 H WFO PUEBLO8992 01 PUEBLO38 17 104 31W 46538 8 0 H WHEAT RIDGE 28995 04 JEFFERSON39 46 105 7W 539838 38 0 H WILD HORSE 6N9058 01 CHEYENNE38 54 103 1W 465415 15 0 H WILLIAMS FORK DAM9096 02 GRAND40 2 106 12W 761837 37 0 CH WINTER PARK9175 02 GRAND39 53 105 46W 909519 77 0 H WOODROW 6NNE9213 04 MORGAN40 5 103 34W 43748 26 0 H WRAY9243 03 YUMA40 4 102 14W 3607 125 125 0 H YAMPA9265 02 ROUTT40 9 106 55W 785758 88 0 H YELLOW JACKET 2W9275 02 MONTEZUMA37 31 108 45W 693343 43 0 H YUMA9295 03 YUMA40 7 102 43W 413481 123 0 H YUMA 10 NW9297 03 WASHINGTON40 13 102 49W 41100 30 0 H
REFERENCE NOTES33STATION NAMES: Name of the city, town or locality. Figures and letters following thestation names indicate the distance in miles and direction from the post office or town community center. DIVISIONS: Areas within a state of similar climatological characteristics. Division averages are calculated using data from stations that record temperature and/or precipitation.Station Precipitation totals flagged with an 'F' or 'M' are excluded from the Divisional Average calculations of precipitation. Stations with monthly Temperature averages flagged with an 'F' or 'M' are included in the Divisional Average if there are no more than 9 flagged or missing daily values in the month, else they are excluded from the divisional averagefor temperature. NORMALS: The average value of the meteorological element over a time period. Effective 1 January 2012, the averaging period is 1981 to 2010. The normals for National Weather Servicelocalities have been adjusted so as to be representative for the current observation site.TEMPERATURE EXTREMES AND FREEZE DATA: Spring minimum dates are obtained from data for January through June; Fall dates are from July through December data. "NONE" indicates temperature threshold not reached. "MSG" indicates available data insufficient to determine date.MONTHLY DEGREE DAY TOTALS: One heating (cooling) degree day is accumulated for each whole degree that the daily mean temperature is below (above) 65 degrees Fahrenheit.SOIL TEMPERATURE EXTREMES: The highest and lowest Max and Min temperature for each month and the year.WIND: (As shown in the "Evaporation and Wind" table) the total wind movement in miles over the evaporation pan as determined by an anemometer recorder located 6-8 inches above the pan. SYMBOLS AND LETTERS USED IN THE DATA TABLES- No record. Data not recorded, determined unreliable by quality control checks, or not received in time for publication.* Equipment gage not read. Precipitation is included in the amount following asterisks. Time distribution not known.// Equipment gage equipped with a windshield.A Amount of precipitation is the total of observer's entries for the current month. It may include precipitation that occurred during the previous month. Refer to monthly bulletins to determine date of last reading. E Normalized HDD/CDD Calculation. E is appended to the HDD/CDD Calculation when 1-9 individual daily TMAX and/or TMIN values are missing and a Normalized HDD/CDD Calculation is provided. M appears alone if 10 or more are missing or flagged. F Monthly Calculation Flagged Value. F is appended to the average of the monthly station values when 1-9 daily observations were determined to be invalid during the Quality Control process. M Insufficient or partial data. M is appended to average and/or total values computed with 1-9 daily values missing. M appears alone if 10 or more daily values are missing or flagged.R Amounts from recording rain gage.T Trace. An amount too small to measure. SYMBOLS AND LETTERS USED IN THE STATION INDEX TABLE# Thermometers located in rooftop shelter.C Station is equipped with a recording rain gage (R), but values in this bulletin are from a non-recording rain gage unless indicated by an R.G Observations appear in "Soil Temperatures" table.H Observations appear in "Snowfall and Snow on the Ground" table in monthly "Climatological Data" publication.J Station also published as a "Local Climatological Data" bulletin. Seasonal Tables: Monthly and seasonal snowfall and heating degree days for the 12 months ending with the June data are published in the July issue of "Climatological Data".Cooling degree days for the calendar year are published in the "Climatological Data Annual Summary".Additional precipitation data are contained in the "Hourly Precipitation Data" bulletin for each state.Information concerning the history of changes in locations, exposure, etc. of substations is kept on file at the National Centers For Environmental Information. Historical information of regular National Weather Service Offices may be obtained from the "Local Climatological Data" annual publication. The contents of this publication may be reprinted or otherwise used freely, with proper credit to the National Centers For Environmental Information. The data are also available digitally.ERRATABeginning in January of 2011, CD Publications are produced from the Global Historical Climatology Network data set. (http://www.ncdc.noaa.gov/oa/climate/ghcn-daily/) The GHCND data Version is printed on first page of the publication.New flags were added to indicate:E Normalized HDD/CDD, Evap, and Wind Movement Calculations in 2011, previously was B.F Monthly calculation flagged value.Station metadata is provided by NCEI's Products Branch from the Historical Observing Metadata Repository: http://www.ncdc.noaa.gov/homrAs of the 2011 Data-Year, Station and Climate Division Maps are no longer being includedin the CD Publications. NCEI's Products Branch provides updated Station Mapsfor various data networks via the Historical Observing Metadata Repository: http://www.ncdc.noaa.gov/homr.Beginning with the January 2013 CD Publication, monthly mean temperature calculations have changedto the National Data Stewardship Team standard. Monthly maximum and minimum temperatures are notrounded until after the monthly mean temperature is calculated. This is the most accurate outcome,but may be slightly different from the mean derived from rounded monthly maximum and minimum.Processing Updates and Errata: The CD Publications are periodically reproduced to include the addition of latereports and reported corrections. The GHCND data version noted on the cover of the publication provides the generation date.The climate division temperature and precipitation values in this publication are based on simple averages from the current set of NWS-Designated Open and Published COOP and First Order Sites within each division. These values differ from those found in NCEI's nClimDiv product. Beginning in February 2014, the nClimDiv product isused by NCEI's Monitoring Branch and in its monthly climate reports. For more details on nClimDiv, please go to http://www.ncdc.noaa.gov/monitoring-references/maps/us-climate-divisions.php .
NOAA National Centers For Environmental Information
Attn: Customer Engagement Branch
151 Patton Avenue
Asheville, NC 28801-5001
Customer Services Number: (828) 271-4800, option 2
TDD : (828) 271-4010
Fax number: (828) 271-4876
NCEI now offers free online access to the Climatological Data publication.
Go to : www.ncdc.noaa.gov and choose Most Popular.
NOAA Technical Report NWS 33
Evaporation Atlas
for the Contiguous
48 United States
Washington, D.C.
June 1982
U. S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Weather Service
NOAA TECHNICAL REPORTS
National Weather Service Series
The National Weather Service (NWS) observes and measures atmospheric phenomena; develops and distrib-
utes forecasts of weather conditions and warnings of adverse weather; collects and disseminates weather
information to meet the needs of the public and specialized users. The NWS develops the national
meteorological service system and improves procedures, techniques, and dissemination for weather and
hydrologic measurements, and forecasts.
NWS series of NOAA Technical Reports is a continuation of the former series,
Weather Bureau (WB).
Reports listed below are available from the National Technical Information
ment of Commerce, Sills Bldg., 5285 Port Royal Road, Springfield, Va. 22161.
accession number (given in parentheses).
ESSA Technical Reports
ESSA Technical
Service, u.s.
Prices vary.
Report
Depart-
Order by
WB 1 Monthly Mean 100-, 50-, 30-, and 10-Millibar Charts January 1964 through December 1965 of the
IQSY Period. Staff, Upper Air Branch, National Meteorological Center, February 1967, 7 p,
96 charts. (AD 651 101)
WB 2 Weekly Synoptic Analyses, 5-, 2-, and 0.4-Mb Surfaces for 1964 {based on observations of the
Meteorological Rocket Network during the IQSY). Staff, Upper Air Branch, National Meteorologi-
cal Center, April 1967, 16 p, 160 charts. (AD 652 696)
WB 3 Weekly Synoptic Analyses, 5-, 2-, and 0.4-Mb Surfaces for 1965 {based on observations of the
Meteorological Rocket Network during the IQSY). Staff, Upper Air Branch, National Meteorologi-
cal Center, August 1967, 173 p. (AD 662 053)
WB 4 The March-May 1965 Floods in the Upper Mississippi, Missouri, and Red River of the North Basins.
J. L. H. Paulhus and E. R. Nelson, Office of Hydrology, August 1967, 100 p.
WB 5 Climatological Probabilities of Precipitation for the Conterminous United States. Donald L.
Jorgensen, Techniques Development Laboratory, December 1967, 60 p.
WB 6 Climatology of Atlantic Tropical Storms and Hurricanes. M. A. Alaka, Techniques Development
Laboratory, May 1968, 18 P• ~
WB 7 Frequency and Areal Distributions of Tropical Storm Rainfall in the United States Coastal Region
on the Gulf of Mexico. Hugo V. Goodyear, Office of Hydrology, July 1968, 33 p.
WB 8 Critical Fire Weather Patterns in the Conterminous United States. Mark J. Schroeder, Weather
Bureau, January 1969, 31 p.
WB 9 Weekly Synoptic Analyses, 5-, 2-, and 0.4-Mb Surfaces for 1966 (based on meteorological rocket-
sonde and high-level rawinsonde observations). Staff, Upper Air Branch, National Meteorological
Center, January 1969, 169 p.
WB 10 Hemispheric Teleconnections of Mean Circulation Anomalies at 700 Millibars. James F. O'Connor,
National Meteorological Center, February 1969, 103 p.
WB 11 Monthly Mean 100-, 50-, 30-, and 10-Millibar Charts and Standard Deviation Maps, 1966-1967.
Staff, Upper Air Branch, National Meteorological Center, April 1969, 124 p.
WB 12 Weekly Synoptic Analyses, 5-, 2-, and 0.4-Millibar Surfaces for 1967. Staff, Upper Air Branch,
National Meteorological Center, January 1970, 169 p.
NOAA Technical Reports
NWS 13 The March-April 1969 Snowmelt Floods in the Red River of the North, Upper Mississippi, and Mis-
souri Basins. Joseph L. H. Paulhus, Office of Hydrology, October 1970, 92 p. (COM-71-5P269)
NWS 14 Weekly Synoptic Analyses, 5-, 2-, and 0.4-Millibar Surfaces for 1968. Staff, Upper Air Branch,
National Meteorological Center, May 1971, 169 p. (COM-71-50383)
NWS 15 Some Climatological Characteristics of Hurricanes and Tropical Storms, Gulf and East Coasts of
the United States. Francis P. Ho, Richard w. Schwerdt, and Hugo V. Goodyear, May 1975, 87 p.
(COM-75-11088)
(Continued on p. 27)
(Continued from inside front cover)
NWS 16 Storm Tide Frequencies on the South Carolina Coast. Vance A. Myers, June 1975, 79 p. (COM-75-
11335)
NWS 17 Estimation of Hurricane Storm Surge in Apalachicola Bay, Florida. James E. Overland, June 1975.
66 p. (COM-75-11332)
NWS 18 Joint Probability Method of Tide Frequency Analysis Applied to Apalachicola Bay and St. George
Sound, Florida. Francis P. Ho and Vance A. Myers, November 1975, 43 p. (PB-251123)
NWS 19 A Point Energy and Mass Balance Model of a Snow Cover. Eric A. Anderson, February 1976, 150 p.
(PB-254653)
NWS 20 Precipitable Water Over the United States, Volume 1: Monthly Means. George A. Lott, November
1976, 173 p. (PB-264219)
NWS 20 Precipitable Water Over the United States, Volume II: Semimonthly Maxima. Francis P. Ho and
John T. Riedel, July 1979, 359 p. (PB-300870)
NWS 21 Interduration Precipitation Relations for Storms -Southeast States. Ralph H. Frederick, March
1979, 66 p. (PB-297192)
NWS 22 The Nested Grid Model. Norman A. Phillips, April 1979, 89 p. (PB-299046)
NWS 23 Meteorological Criteria for Standard Project Hurricane and Probable Maximum Hurricane and
Probable Maximum Hurricane Windfields, Gulf and East Coasts of the United States. Richard W.
Schwerdt, Francis P. Ho, and Roger R. Watkins, September 1979, 348 p. (PB-80 117997)
NWS 24 A Methodology for Point-to-Area Rainfall Frequency Ratios. Vance A. Myers and Raymond M. Zehr,
February 1980, 180 p. (PB80 180102)
NWS 25 Comparison of Generalized Estimates of Probable Maximum Precipitation With Greatest Observed
Rainfalls. John T. Riedel and Louis C. Schreiner, March 1980, 75 p. (PB80 191463)
NWS 26 Frequency and Motion of Atlantic Tropical Cyclones. Charles J. Neumann and Michael J. Pryslak,
March 1981, 64 p. (PB81 247256)
NWS 27 Interduration Precipitation Relations for Storms--Western United States. Ralph H. Frederick,
John F. Miller, Francis P. Richards, and Richard W. Schwerdt, September 1981, 158 p. (PB82 230517)
NWS 28 GEM: A Statistical Weather Forecasting Procedure. Robert G. Miller, November 1981, 103 p.
NWS 29 Analyses of Elements of the Marine Environment for the Atlantic Remote Sensing Land Ocean
Experiment (ARSLOE)--An Atlas for October 22 Through October 27, 1980. Lawrence D. Burroughs,
May 1982, 116 p.
NWS 30 The NMC Spectral Model. Joseph G. Sela, May 1982, 38 p.
NWS 31 A Monthly Averaged Climatology of Sea Surface Temperature. Richard W. Reynolds, June 1982, 37 P•
NWS 32 Pertinent Meteorological and Hurricane Tide Data for Hurricane Carla. Francis P. Ho and John F.
Miller, unpublished.
NOAA Technical Report NWS 33
Evaporation Atlas
for the Contiguous
48 United States
Richard K. Farnsworth
Edwin S. Thompson
and
Eugene L. Peck
Office of Hydrology
National We~ther Service
Washington, D.C.
June 1982
U.S. DEPARTMENT OF COMMERCE
Malcolm Baldrige, Secretary
National Oceanic and Atmospheric Administration
John V. Byrne, Administrator
National Weather Service
Richard E. Hallgren, Director
CONTENTS Page
ABS TRA.CT •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 1
1. INTRODUCTION •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 1
2. BASIC DISCUSS ION •••••••••••••••••••••••••••••••••••••••••••••••••••••••• '· ••• 2
2.1
2.2
2.3
Pan Evaporation •••••••••••• ~ •••••••••••••••••••••••••••••••••••••••••••• 2
Free Water Surface Evaporation ••••••••••••••••••••••••••••••••••••••••• 4
Pan Coefficients ........................................................ 5
3. SELECTION OF BASE PERIOD •••••••••••••••••••••••••••••••••••••••••••••••••••• 6
4. BASIC DATA SO'URCES •••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 6
5. DATA PRESENTATION •••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 10
6. PAN EVAPORATION MA.P •••••••••••••••••••••••••••••••••••••••••••••••••••••••• 11
6.1
6.2
6.3
6.4
6.5
Period Adjustment of Observed Pan Station ••••••••••••••••••••••••••••• 11
Map Preparation ••••••••••••••••••••••••••••••••••••••••••••••••••••••• 11
California Area ••••••••••••••••••••••••••••••••••••••••••••••••••••••• 13
Other Types of Pans •• •f...• ••••••••••••••••••••••••••••••••••••••••••••••• 13
Estimates from Meteorological Factors ••••••••••••••••••••••••••••••••• 15
7. PAN COEFFICIENT MA.P •••••••••••••••••••••••••••••••••••••••••••••••••••••••• 15
8. FREE WATER SURFACE EVAPORATION MAPS •••••••••••••••••••••••••••••••••••••••• 15
9.
10.
11.
8.1
8.2
May through October Ma.p ••••••••••••••••••••••••••••••••••••••••••••••• 15
Annual Map •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 1 7
ADDITIONAL INFORMATION •••••••••••• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • 17
9.1
9.2
9.3
Long-Term Variability •••••••• ••••••••••••••••••••••••••••• 17
Monthly Values •••••••••••••••••••••••••••••••••••••••••••••••••••••••• 17
Selected Values for Map Isopleths ••••••••••••••••••••••••••••••••••••• 17
LIMITATION ON USE OF MAPS •••••••••••• •••••••••••••••••••••••••••••••••••••• 23
10.1
10.2
Stations ••••••••••••••••••••••••••••••••••••••••••••• 23 Distribution of
Use of Maps for Estimating Actual Lake Evaporation ••••••••••••••••••• 23
S~Y •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 23
AC'KNOWLEDGMENTS ••••••••••••••••••••••••••••••••••••••••••••• • • •••••••• • • • • ••••• 24
REFERENCES ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 24
ii
FIGURES
1. Distribution of Class A pan stations which make concurrent
measurements for computing FWS evaporation by Equation 3 •••••••••••••••••• 7
2. Distribution of Class A pan stations reporting observed
evaporation only •••••••••••••••••••••••••••••••••••••••••••••••••••••••••• a
.
3. Distribution of weather stations measuring a form of air
temperature, humidity, wind movement, and radiation •••••••••••• ~ •••••••••• 9
4. Outlines of regions used in developing pan evaporation vs.
elevation relations •••••••••••••••••••••••••••••••••••••••••••••••••••••• !!
5. Pan evaporation vs. elevation curve for Region A on figure 4
(California) ••••...•.•...••••....•...••••..•••..••••...••.•..••••••.••••• 12
6. Pan evaporation vs. elevation curve for Region B on figure 4
(New Mexico, Colorado, and Wyoming) •••••••••••••••••••••••••••••••••••••• l2
7. Deviation in inches of May-October free water surface
evaporation ~f (computed using meteorological factors)
from equivalent map points Em 2 (station point values
from map 2) derived from the analysis of observed values ••••••••••••••••• l6
8. Graphs of mean monthly percent of annual evaporation for
40 selected stations ••••••••••••••••••••••••••••••••••••••••••••••••••••• 22
TABLES
1. Stations used to develop Class A pan estimates from Young pan •••••••••••••• l4
2 •. Comparison of evaporation for IS-year base period with
other periods •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• l8
3. Adjusted mean monthly Class A pan evaporation for selected
stations 1956-1970 ••••••••••••••••••••••••••••••••••••••••••••••••••••••• 20
iii
MAPS
(found in pocket in back cover)
1. Class A pan evaporation (average for May through October)
2. Shallow lake or free water surface (FWS) evaporation
(average for May through October)
3. Shallow lake or free water surface (FWS) evaporation (average annual)
4. Map of coefficients to convert Class A pan evaporation to FWS evaporation
(for period May through October)
iv
EVAPORATION ATLAS FOR THE CONTIGUOUS 48 UNITED STATES
Richard K. Farnsworth and Edwin s. Thompson,
Office of Hydrology, National Weather Service, NOAA,
Silver Spring Maryland
and
Eugene L. Peck
HYDEX Corporation, Fairfax, Virginia
ABSTRACT. Maps are presented showing the areal dis-
tribution in the contiguous 48 states of evaporation
(1) observed from Class A pans from May through
October, (2) estimated for a free water surface (FWS)
with negligible heat storage from May through October,
and (3) estimated for an FWS for the entire year. A
map is presented of coefficients to convert from pan
evaporation to FWS evaporation. Sources of data,
analyses of the maps, and limitations on their use are
described.
1. INTRODUCTION
Evaporation information collected by the National Weather Service (NWS) from
Class A pans and synoptic and basic observation stations (NOAA-NWS 1979) in the
contiguous 48 states has been processed and analyzed, and the analyses are
presented on four maps.
The maps, printed on a scale of 1/4,800,000, are:
Map 1: Class A pan evaporation (average for May through
October),
Map 2: Shallow lake or free water surface (FWS) evaporation
(average for May through October),
Map 3: Shallow lake or free water surface (FWS) evaporation
(average annual), and
Map 4: Map of coefficients to convert Class A pan evaporation
to FWS evaporation (for period May through October).
Map 1 represents the evaporation during May through October from a Class A
pan situated in an open area subject to representative humidities and wind expo-
sures, i.e., not protected by shelter-belt trees or buildings and not located in
a heavily irrigated field.
Maps 2 and 3 represent growing season (May through October) and annual
evaporation, respectively, from a shallow lake or a free water surface (FWS).
FWS evaporation, which these maps display, is primarily estimated from observed
pan data and is considered by many hydrologists to be equivalent to potential
evaporation or the evaporation expected from a natural water surface or very wet
soil. The values are also considered a good index to potential evapotranspiration
or potential consumptive use.
1
Map 4 represents the coefficient required to convert Class A pan evaporation
to FWS evaporation (May through October).
Detailed information on the sources, limitations, and adjustments of the
data and on the techniques used in analyzing the maps are referenced or explained
in this report.
This publication updates Technical Paper No. 37, Evaporation Maps of the
United States (Kohler et al., 1959) published by the Weather Bureau [now the
National Weather Service (NWS)].
Records of evaporation data were rather limited when the ~ps in Technical
Paper No. 37 were prepared. However, the maps have served well the needs for
general information on evaporation. The number of stations reporting pan
evaporation generally increased until the late 1970's, when there was a substan-
tial decrease in the official NWS evaporation network. In the preparation of the
current maps, earlier maps were carefully studied, and differences in the
analyses are considered to be reasonably substantiated by the data now available.
Major changes in the maps may be noted for the mountainous West, where the
earlier records available for Technical Paper No. 37 were extremely sparse.
The data for the analysis on map 1 are primarily observed evaporation
measurements from Class A pans adjusted to the period 1956-70. (See the listing
Climatological Data in the references.) Additional estimates were developed from
meteorological measurements by a method based on eq. 10 of u.s. Weather Bureau
Research Paper No. 38 (Kohler et al., 1955) using a program developed by Lamoreux
(1962).
Additional data not published in Climatological Data were also collected and
used in the analyses. An extensive literature search was conducted, and State
Climatologists from many Central and Western States were consulted to obtain all
possible information on Class A pan and free water evaporation, especially for
the more arid areas of the country.
2. BASIC DISCUSSION
2.1 Pan Evaporation
Pan evaporation is used in this report to mean evaporation observed at a
standard NWS Class A pan installation by observers following standard techniques.
These installations and techniques are described in the NWS Observing Manual
No. 2--Substation Observations (NOAA-NWS, 1972). The Class A pans are generally
of monel metal, unpainted, 47.5 inches in diameter, 10 inches deep, and mounted
on a platform a few inches above the surrounding soil. Most observations are now
made using a fixed-point gage (a pointed shaft, extending vertically from the
bottom of the pan, surrounded by a stilling well). The top or point is fixed so
that when the water surface just meets the point, the surface is 2 inches below
the rim of the pan. Measured amounts of water are added, or removed in the case
of rain, to maintain the water surface 2 inches below the rim of the pan.
Measurements using nonstandard pans or measurement methods may differ from
those using standard pans and techniques. Use of nonstandard pans in California
is described in section 6.5. There are a large number of nonstandard pans (for
example, painted pans or sunken pans) in the United States. Because measurements
2
from nonstandard pans are difficult to compare with those from standard pans, NWS
policy is to publish only data from the standard installations.
High winds, heavy rains, and below-freezing temperatures often prevent
reliable measurements with a pan. Several equations have been developed to allow
computation of estimated evaporation when such conditions occur. These equations
may also be used to compute "pan" evaporation from meteorological data when no
pan is present. An example of such an equation (Penman, 1948) is
E = p (1)
where Ep is the estimated daily pan evaporation in inches, Qn is the net radia-
tion in langleys per day, ~ is the slope of the curve relating saturation vapor
pressure to temperature at air temperatures (Ta), yp is the constant in the
psychrometric equation generally given as 0.025 inches of Hg/°F for a pan, and Ea
is the evaporation computed in inches when the measured air temperature is
considered the same as the temperature of the water surface if a Class A pan were
physically present. Ea is given in inches by the equation,
(2)
where U is the daily wind movement measured by the pan anemometer in miles per p
day and es -ea is the difference in inches of Hg between the vapor pressure of
the air and the saturated vapor pressure of air at the temperature of the water
surface.
1 The solution of eqs. (1) and (2) requires measurement of wind movement, mean
air temperature, mean dew point, and daily solar radiation. There are only a
limited number of solar radiation stations in the United States. Hamon et al.
(1954) developed a technique for estimating solar radiation from percent sunshine
as reported by a large number of stations. Thompson (1976) derived a relation-
ship between percent cloud cover and solar radiation.
The wind movement required for use in eqs. (1) and (2) is that measured at
the anemometer height for a Class A pan (nearly 2 feet above the ground level).
Most wind records from meteorological stations are for much higher levels. The
formulas normally used in reducing the wind to the anemometer height are exponen-
tial or logarithmic in form, and no one formula has been found that is completely
adequate for estimating values at levels near the surface of the ground. Thus,
error may be introduced into the pan evaporation estimates based on meteoro-
logical parameters when the station anemometer height is significantly higher
than 2 feet.
3
2.2 Free Water Surface Evaporation
"Free water surface" (FWS) evaporation is defined to mean evaporation from a
thin film of water having no appreciable heat storage. While it is a somewhat
theoretical term, it can be practically approximated and is determined most
commonly by multiplying the observed pan evaporation by a coefficient described
in more detail later. FWS evaporation is of great interest to users because it
closely represents the potential evaporation from adequately watered natural
surfaces such as vegetation and soil. In the literature (for example, USWB
Technical Paper No. 37), the term "lake" evaporation has been used with the same
meaning; however, this usage has led to some confusion. The evaporation from a
real lake may differ significantly from FWS evaporation during a given month
because of a change in heat storage in the lake. Only when the change in heat
storage is negligibly small will FWS be a good estimation of the evaporation from
the lake. For any period other than an exact year, estimates of actual evapora-
tion from a lake surface (based on estimates of FWS evaporation) are bound to be
biased by the hysteresis effect of heat storage in the lake. During the spring,
heat is stored in the waters of a lake, and generally, the actual lake evapora-
tion is much less than the computed FWS evaporation. During the fall, the stored
energy in the lake is released and the actual lake evaporation is much greater
than the FWS evaporation. For example, on the Great Lakes in the United States
the maximum lake evaporation may occur during the late autumn months of October,
November, or December, while the maximum pan and FWS evaporation occurs some time
from June to August.
Techniques for computing FWS evaporation from meteorological factors and
from Class A evaporation pans equipped to measure water temperatures are described
in Weather Bureau Research Paper No. 38 (Kohler et al., 1955). The required
input measurements when pan evaporation (Ep) observations are available are:
mean air temperature in °F (Ta), mean water surface termperature in °F (T 0 ), and
wind travel (Up) in miles per day over the pan. FWS evaporation is given by
eq. 14 in the reference,
( FWS (inches) = 0.70 [EP + 0.00051 Pap (0.37 + 0.0041 up) (T 0 -Ta)0 •88 ] , (3)
where P is the mean station pressure in inches of Hg and a is the ratio of the
advected energy used in (or not available for) evaporation to the total advected
energy into (or out of) the water body. [In eq. (3), a is designated with a sub-
script p to indicate that it is used as the fraction of the total energy loss asso-
ciated with evaporation from a pan.] The general form for a for a shallow lake is
a = * * * (4)
(EL-EL) + (Qbs-Qbs) + (Qh-Qh)
* where EL - E is the incremental change in energy used in evaporation for an
L * * incremental increase in the surface water temperature T -T, Qbs -Qbs is the
corresponding
*
incremental change in the energy radiated from the surface of the
water, and Qh -Qh is the corresponding change in advected energy.
same form with Ep replacing EL·
4
a has the p
FWS is estimated from meteorological factors by eq. 10 in Research Paper No. 38,
FWS (inches) 0.70 (5)
where all terms except yare defined as in eq. (1). y = 0.000367P where Pis the
station pressure as defined for eq. (3). In this paper, y is taken to equal 0.0105
inches of Hg/°F. These equations were adapted for computer use by Lamoreux (1962).
Many factors are involved in the relationship of FWS evaporation (potential
evaporation) to actual evaporation (or, more exactly, evapotranspiration). Direct
measurements of actual evaporation from a lake surface or evapotranspiration from
a watershed are almost impossible. The FWS evaporation or potential evaporation
can be estimated with reasonable accuracy. Many studies have been conducted to
develop seasonal or monthly factors to adjust FWS evaporation to estimates of actual
evaporation or evapotranspiration (Pruitt, 1966; Mustonen and McGuinness, 1968).
2.3 Pan Coefficients
The pan coefficient, a ratio of FWS evaporation to observed pan evaporation,
has been determined at a few locations by comparing pan evaporation with direct
estimation of lake evaporation (corrected for heat storage to obtain potential
evaporation) from a detailed water budget (USGS, 1954). More often, however, the
coefficient for a given location is computed by taking either the ratio of FWS
evaporation to observed pan evaporation, where FWS evaporation is computed by
using the pan observation with measured water temperature and daily wind movement
(eqs. 3 and 4) or, for synoptic weather stations, the ratio of FWS/EP, where FWS
is estimated using eq. (5) and Ep is estimated using eqs. (1) and (2).
The pan coefficient commonly used to compute FWS evaporation from Class A pan
measurements is 0.7. As seen in map 4, the pan coefficients in the United States
vary from 0.64 to 0.88 for the May through October period. The value of· the pan
coefficient is dependent upon the average climatic condition for the area. (When
climatic conditions are such that the water in the exposed pan is warmer than the
air, the coefficient is greater than 0.7, and vice versa.) The coefficient for a
particular location may also change from the warmer months (May through October)
to the colder months (November through April). In general, the tendency for most
locations is for winter coefficients to be lower than those for summer months. For
an extreme example, pan coefficient values along the coast of southern California
range from 0.88 for the warmer months to 0.64-0.68 for the colder months.
Pan coefficients computed on a monthly basis may show significant varia-
bility. Areas with mild winters show less variability than stations subject to
freezing temperatures. Generally, coefficients are most stable in summer and
most variable in spring and fall. In a large part of the country, a major per-
centage of the annual evaporation occurs in the summer; therefore, reasonable
estimates of yearly FWS evaporation can be obtained using average pan coeffi-
cients for the warm season (map 4). Areas subject to freezing generally have no
pans in service during the winter, so winter coefficients are not needed. How-
ever, winter pan or lake evaporation can be computed from meteorological data.
The primary reason for variations in pan-to-lake coefficients is the energy
exchange through the sides and bottom of the Class A pan. The technique (eq. 3)
5
of Kohler et al., 1955, discussed earlier in this section, was derived for adjust-
ing such energy exchange and for computing FWS evaporation on a daily basis. In
this way, the pan-to-lake coefficie-nt for a particular location and time period
can be determined.
3. SELECTION OF BASE PERIOD
Early in the 1970's it was planned to update the evaporation maps. Consid-
erable work was done to adjust all data to the 15-year period 1956-70. However,
the actual development of the maps was delayed. When analyses of the maps began
in 1980, consideration was given to using a lor~er and/or later time base. How-
ever, no compelling reason could be found to change the selected base period.
Reasons for retaining the base period are (1) the average evaporation for periods
longer than 10 years shows little change with time (table 2) and (2) cutbacks in
the evaporation network and conversion to nonstandard equipment and nonstandard
observing techniques occurred at many stations in the 1970's. Thus, while use of
a longer base period that is later in time or compatible with a 30-year climatic
base might provide small changes in estimated mean evaporation, it would reduce
the number of stations having complete records for the selected time base.
4. BASIC DATA SOURCES
The primary source of pan evaporation data was the Climatological Data
series for 1956-70. (See references.) From that source, over 400 stations had
measured water temperatures together with pan evaporation and wind movement
measurements (figure 1). An additional group of about 170 stations (figure 2)
recorded only pan evaporation and, in some cases, wind movement. (Some of these
stations added temperature and wind sensors during the base period, but the length
of record wa~ inadequate for use on the maps.) Additional data were obtained from
State Climatologists and other sources. The publication, Evaporation from Water
Surfaces in California, was furnished by the State Climatologist for California
(Goodridge, 1979). This publication contained 478 evaporation records as measured
by 30 different types and sizes of evaporation pans. Of these, 261 were from
Class A pans, and 64 of the 261 records were published in Climatological Data.
These Class A pan station locations are included in the stations plotted in
figures 1 and 2. In addition to the above mentioned publication, the State
Climatologist provided a computer tape containing all of the California data,
which made the handling of these data very convenient.
The total number of Class A pan records from all sources used in the analysis
was approximately 800. Of these, approximately 210 were from stations that had
observed data for the entire year.
Meteorological data from synoptic/basic NWS weather stations comprised a
second major source of information. Where temperature, humidity, and wind measure-
ments were available with some estimate of solar radiation, pan evaporation and
FWS evaporation could be computed from techniques described in Research Paper
No. 38 (Kohler et al., 1955). There wece 225 synoptic/basic meteorological
network statlons (without pan evaporation records) for which estimates of pan and
FWS evaporation were computed. The distribution of the stations is shown in
figure 3. The estimated solar radiation used in these computations included
measured incoming solar radiation records for 18 percent of the stations,
sunshine data for 39 percent, cloud cover for 34 percent, and a combination of
data types for the remaining 9 percent.
6
'-l
F• T .· I T
t '·-TT
/~T ·~·
T ,/
(
' :~
rR
\
)
I T T I R
\ R R )~ \ T ;11 WR
? ~ T R
\ \
)T \ C:r__ f ~
'o.,_ \ \
l, RT ,/ ~" \ T /
~
R
R
R
T
T IR
T
~IT
T
T
T T lT
T
T
T
T
T
T T
T IT T T T TT
T T --l:.._
T
T T T
R TT T
Tlf
T
T
T T I T
T
T T / T ~T T
T T
R
T T
T
T
\_.~___..
T
T t Rr
T
T
)
. i ~\ T C---\ , :..--~~ " X..' -~
/'
Figure !--Distribution of Class A pan stations which make concurrent measurements for computing
~ .....r·-'~ ._,
l"c,. ~'-'
FWS evaporation by equation 3. Stations identified by an R were not equipped with sensors
to record additional data until the latter part of the 1956-70 time base.
00
p
lp
p p
p
p
p
p lp
p p
p k: p p
.1 ppP
p
I p ~ ').p~ _P..., \ p
p
p p
pI
PPp
p p Pp
p p
I p
pP
~/~~
p!f>FP p
I
p
I;)..U
p p
p r:P pp
p p p D -
p
p ~~
p ~
p p FP
p D
/
/'
Figure 2--Distribution of Class A pan stations reporting observed evaporation only (water temperature
not measured or measured for an insufficiently long period of record).
1.0 "'
M
M IM
M M
M
M
M M l"
" I /M
M IM
M
M
M M
M
M
M
/'""1. '"""!_
M
~
,('/
Figure 3--Distribution of weather stations measuring a form of air temperature, humidity, wind
movement, and radiation, where evaporation can be estimated by the Penman (1948) equation.
An attempt was made to locate additional information that would be of value
in the development of the evaporation maps. A computer search was made of the
literature files available to NOAA's Atmospheric Sciences Library for all article
abstracts containing the words "evaporation" and "lake." Several bibliographies
on evaporation were also searched (Robinson and Johnson, 1961). The number of
reports that contained additional data on pan evaporation or estimates of lake
evaporation were limited. In most cases, the records were for relatively sho~t
periods (from a few months to 2 years) and were not sufficient for determining a
long-term average. In most cases, these records compared favorably with the
analysis based on the available data. When there was an apparent difference, an
effort was made to obtain additional information from the State Climatologist or
governmental agencies.
In addition to the pan evaporation and estimates from meteorological fac-
tors, other information relating to pan and FWS evaporation were obtained from
State Climatologists and other sources. For example, estimates of consumptive
use, as calculated by the Soil Conservation Service (SCS) for locations in
New Mexico (SCS, 1972), were used as a guide for the final positioning of iso-
pleths in areas with sparse data. A map of potential evapotranspiration fur-
nished by the State Climatologist was helpful in defining the seasonal FWS
evaporation in Montana (Caprio, 1973).
5. DATA PRESENTATION
~ Maps of average monthly evaporation are of greater interest than annual or
semiannual maps. However, the problems involved in developing consistent monthly
maps for all the climates and physiographic regions of the contiguous United
States made the preparation of such maps infeasible. It was decided that the
most useful maps that could be prepared were those based on estimates of FWS
evaporation for May through October and for the entire year.
In determining the order in which to prepare the selected maps, it was clear
that the most reliable evaporation map would be that of pan evaporation for the
warmer months (map 1). The period of May through October was selected since most
reporting stations had observed data for these months and these months represent
the growing season for much of the country.
The May through October pan coefficient map (map 4) was the second map to be
drawn. It was based primarily on the coefficients determined for approximately
400 stations having pan water temperature and wind movement measurements. In
addition, pan coefficients were determined for the 225 synoptic/basic stations
using methods discussed in section 2.2.
Map 2, the May-october FWS evaporation, was primarily defined by multiplying
the May-October pan evaporation values (map 1) by the appropriate coefficient
from map 4. In addition, point values estimated by eqs. (1), (2), and (5) were
considered in the analysis.
No simple relationship exists between the evaporation during May through
October and that for the entire year. For that reason, a map of FWS evaporation
was prepared for the winter season (November through April, not published). This
map was developed using data and techniques equivalent to those used for the May-
October maps. The final FWS evaporation map (map 3) was then developed by
graphical addition of the two seasonal maps.
10
6. PAN EVAPORATION MAP
6.1 Period Adjustment of Observed Pan Station
Only 27 percent of the nearly 800 Class A pans had a full 15-year (1956-70)
record for May through October. The remainder of the stations were each adjusted
to the 15-year period by prorating data from a station with an incomplete 1956-70
record against data from a nearby station which (1) was in a compatible climatic
regime, (2) had data in the similar incomplete period, and (3) had a computed or
actual average for the 1956-70 period. The following equation was used:
E = ssa
E ssm
E X ER.s56-70 R.sm
where Essa is the adjusted 1956-70 average for a station having a nonstandard
period, Essm is the average for the same station for the nonstandard period,
and ER.sm is the average for the same nonstandard period for a nearby station
that also has an average (ER.s 56 _70 ) for the base period.
6.2 Map Preparati~n
The average values of computed and
observed pan evaporation for the 1956-70
period were used in preparing the May
through October pan evaporation maps.
For areas of low relief in the central
and eastern areas of the United States,
the values were plotted on a base map
with a scale of 1 to 4,800,000 and the
analyses were made directly from those
data.
For locations in mountainous areas
(the 11 Western States and the
Appalachian area of the Eastern United
States), USGS maps with a scale of 1 to
500,000 were used to provide detailed
topographic information for the analyses.
For many areas in the western
United States, the relationship between
evaporation and elevation has been
found to be good (Blaney, 1958).
(6)
Graphs of pan evaporation versus
elevation were drawn by eye for
selected physiographic regions of the
mountainous areas. (See figure 4.)
These graphs showed reasonably good
relationships, with evaporation
decreasing as elevation increased.
Examples of these plots are shown in
figures 5 and 6. Figure 5 is the graph
Figure 4--outlines of regions used in
developing pan evaporation
vs. elevation relations.
11
120
110 \ 100
90
z
0
f-80
<(
"' 0
Q_
<( 70 >
UJ
z
<( 60 CL
f-
u
0
' 50 >-
<(
"'
40
30 ~--------------------------------~
100 1100 2100 3100 4100 5100 6100 7100 8100 9100
ELEVATION IN FEET
Figure 5--Pan evaporation vs. eleva-
tion curve for Region A on
figure 4 (California).
70
(.f)
~ 60
LJ
z
z
0
f-
<(
0:0
0
o_
<(
> w
z
<(
o_
f-
LJ
0
I
>-
<(
:;::
so
40
X X
30
20 L---------------------------------~
4800 5800 6800 7800 8800 9800 10800
ELEVATION IN FEET
Figure 6--Pan evaporation vs. eleva-
tion curve for Region B on
figure 4 (New Mexico,
Colorado, and Wyoming).
for the mountain and desert areas of southeastern California (marked A on figure 4).
The data used for this curve are discussed further in section 6.3. This curve is
the best fit of any of the physiographic regions, with the square of the correla-
tion coefficient (R2 ) equaling 0.99. The curve shows the tendency, reported by
Peck (1967), of these relations to become fairly flat at high elevations in the
Western United States, with little or no further decrease in evaporation with
increased elevation. Figure 6 shows the pan evaporation-elevation relation for
the area of the western slopes of the central Rockies (Region Bon Figure 4).
This relation is more typical of those for the Western United States. Region B
is larger than Region A and represents a larger spread in latitude. The correla-
tion (R 2 = 0.73) indicates that elevation accounts for approximately 70 percent
of the variability for the entire area. Many of the evaporation sites represented
in figure 6 are in relatively open areas (Farmington and Navajo Dam in New Mexico
and Pathfinder Dam in Wyoming) and others are in confined or protected areas (Green
Mountain, Vallecito, Wagon Wheel Gap, and Climax in Colorado). Thus, the scatter
of points around the curve is to be expected. The plotted data points within
each physiographic region generally were found to be close to the smooth curve
drawn by eye through the data. In some cases, however, individual points were
found to deviate considerably from the general relationship. In several of those
cases, the deviating points were later identified with stations that had a
painted pan or nonstandard conditions, situations that were unknown to the
authors until the deviations were investigated. In other cases, especially for
those stations that were found to have less evaporation than the average curve
would indicate, the stations were found to be extremely sheltered or affected by
irrigated areas (not meeting the exposure criteria specified in Observing Hand-
book No. 2--NOAA-NWS, 1972).
12
The pan evaporation vs. elevation curves were of great value in defining
isopleths in the lower valley and bench lands in the mountainous areas. For the
transition zones across physiographic boundaries, the topography and climate (for
instance, the temperature versus elevation curves on the boundary between Idaho
and Montana) were considered in the analyses.
6.3 California Area
The average pan values for the Sacramento and San Joaquin River drainages in
California were found to have little or no consistent relationship with eleva-
tion. In fact, for many areas, the pan values had essentially zero correlation
with elevation (crosshatched areas of figure 4). However, for stations on the
eastern slopes of the Sierra Mountains, a single relationship with elevation
(figure 5) was found to represent all of the area from the Mojave Desert to the
area north of Lake Tahoe. The fit of data for this large expanse of area was one
of the best for the entire West.
The analysis of the seasonal (May through October) pan evaporation values for
the Sacramento and San Joaquin River drainages in California showed centers of
very low and high evaporation. Sufficient data were found to support this unusual
analysis. The centers of low values seemed to be correlated with possible
mesoclimatological regimes induced by meteorological and environmental conditions.
Study of the initial analyses of the seasonal pan evaporation data for the
Central Valley area did lead to the conclusion that many of the pans must be
affected by moisture conditions from irrigation in the immediate area of the
pan. The authors consulted with Mr. James Goodridge, the State Climatologist for
California, on this problem. The report on evaporation records for the State of
California (Goodridge, 1979) contains environmental classification for most pan
evaporation stations. It was assumed that those having Classification A (agro-
climatic station, irrigated) were affected by higher atmospheric moisture
conditions and should have less average pan evaporation than other stations.
(Environmental classification A should not be confused with Class A pans.)
Because the humidity associated with irrigation is induced and subject to
nonclimatic variations, an attempt was made to determine how much these records
might be affected. The work by Pruitt (1966) and others has shown that evapora-
tion pans having a moist upwind fetch may have as much as 26 percent less evapo-
ration than similarly located pans with a dry upwind fetch. Isopleths were
redrawn for the Central Valley without consideration of 50 stations having the
environmental classification A. A comparison of the redrawn map values with the
observed pan values showed that the effect of irrigation had reduced the evapora-
tion by 14.2 percent. (Standard deviation of the individual deviation values is
4.12 inches.) This adjustment was taken into account when records from stations
with Classification A were used for developing the isopleths for the Central
Valley and Pit Valley areas.
6.4 Other Types of Pans
Map 1 of pan evaporation is based primarily on observed and computed Class A
pan evaporation records. However, in many areas of the country, the network of
Class A stations is not adequate to define the regional variability that occurs in
pan evaporation.
13
Measurements are available from a large number of different types of pans and
are published in the State of California report (Goodridge, 1979). This report
contains 10 records from Bureau of Plant Industry pans, 14 from floating pans, 33
from sunken pans (USGS land pan or Colorado pan), and 53 from the Young pan. Many
coefficients have been published for converting records from other types of pans
to Class A pan or to lake evaporation (Goodridge, 1979; Nordenson and Baker, 1962;
Young, 1945). These coefficients vary greatly from pan to pan, and the actual
values are not constant for different climatic regimes and vary with the seasons
of the year. However, several of the stations in southern California have concur-
rent records for different types of pans. There were over 20 stations operating a
Class A pan concurrently with other pans, the most prominent of these other pans
being the Young screened pan. Concurrent periods of record vary from 1 to over 20
years. More than half of these stations had records for 10 years or more. These
records were reviewed along with published coefficients from the literature, and
general relations were developed for specific regions of California. For example,
for the Young screened pan it was evident from the comparison data that the
difference in the evaporation of the Class A and Young pans was related to the
climate of the area. Since the pan-to-lake coefficient (map 4) is a climatic
indicator, it was used as a parameter in a statistical relation for estimating
Class A pan evaporation. The goodness of fit of this relation is shown by
an R2 = 0.89. The relation is shown in the following equation:
where
E A= 37.05 + 0.825 E -0.45 C 4 , c ys map (7)
EcA is average May-oct Class A pan evaporation (inches),
Eys is average May-Oct Young screened pan evaporation (inches), and
Cmap 4 is May-oct pan-to-lake coefficient (from map 4).
The 15 stations listed in table 1 were used to develop the relationship. These
vary in elevation from 96 feet above MSL to over 9,100 feet above MSL.
Table !.--Stations used to develop Class A pan estimates from Young pan
Station
Baldwin Park
Encino Reservoir
Florence Lake
Foreman Creek
Fullerton
Huntington Lake
Kaiser Pass
Oroville Dam
Redinger Lake
San Jacinto Reservoir
Shaver Lake
Silver Lake
Thermalito
Thousand Oaks
Yuma, Arizona
Period of Record
22
28
12
4
4
12
12
10
12
11
12
14
6
5
3
All but one of these stations are found in three clusters in
the central and southern parts of the state.
14
This and other relations served as a guide in the analysis of the isopleths for
the various locations in California where they were applicable.
6.5 Estimates from Meteorological Factors
Comparison of meteorological estimates of pan evaporation, throughout the
country, with observed pan evaporation data indicated a slight overall negative
bias. In the Central United States, pan evaporation estimates from synoptic/
basic station meteorological data seemed to be significantly lower than pan data
observed ne~rby. This discrepancy tended to indicate a regional bias in the
meteorological estimates.
A map of differences between the isopleth values from a preliminary pan
evaporation map and the computed estimates from meteorological data from the
synoptic/basic stations verified the regional biases for the western Great Plains.
Corresponding differences were also observed between the estimates of FWS evapora-
tion based on pan data (map 2) and those computed from meteorological data. A map
of these differences for FWS estimates for the May-October period is shown in
figure 7. For most of the country, little bias is apparent in the meteorological
estimates. However, for the area of the western Great Plains, a strong negative
regional bias ranges up to more than 13 inches. No definite reason has been deter-
mined for this bias. It is postulated that the clear air instability during the
summer period could be a contributing factor. Since there are some apparent reasons
that the estimates based on meteorological data should be biased and no obvious
reasons that estimates based on pan data should be biased, the assumption was made
that the pan measurement is the more nearly correct. Regardless of the causative
factor, the map was valuable in using the meteorological estimates for the Central
United States.
7. PAN COEFFICIENT MAP
The map (map 4) for pan coefficients was based on approximately 400 coeffi-
cients determined from pans equipped to measure water temperatures and on the
coefficients derived using meteorological data from the 225 synoptic/basic weather
stations. The period May through October was selected as the most beneficial for
users since the coefficients are applied primarily to data collected during these
months of greatest evaporation. In addition, a basic purpose of this pan
coefficient map is to aid in developing the May through October FWS map.
For the areas of low relief, the map was analyzed directly from the plotted
data. In the mountainous areas, topography (elevation) appeared to be related to
pan coefficients.
8. FREE WATER SURFACE EVAPORATION MAPS
8.1 May Through October Map
FWS evaporation (map 2) exhibits a pattern similar to that of pan evaporation
(map 1) with regional variations related to the values on the pan coefficient map.
The primary method of analysis used for deriving the May through October map
(map 2) was the application of the coefficient values (map 4) to the pan evapora-
tion values (map 1). Individual values of FWS evaporation computed by eq. (3)
and values derived from meteorological factors computed by eq. (5) were plotted
on preliminary copies of map 2 as a check on the analysis.
15
t-O
0'\
Figure 7--Deviation in inches of May-October free water surface evaporation ~f (computed using
meteorological factors) from equivalent map points Em 2 (station point values from map 2)
derived from the analysis of observed values. Map value = Emf -Em 2
8.2 Annual Map
Two seasonal FWS evaporation maps (May through October and November through
April) were graphically added to obtain the annual FWS map. The regional varia-
bility of evaporation is proportionally greater in the winter than in the summer
because of freezing conditions at higher elevations and in the northern latitudes.
A November through April map (not published) of FWS evaporation was prepared
using techniques similar to those used in developing the summer seasonal maps.
In some areas, it was first necessary to prepare a winter pan evaporation map to
develop the November through April FWS map as was done for the summer season.
For other areas where there were more computed November through April FWS evapo-
ration values, the map was prepared directly using eqs. (3) and (4) where there
were pan records and eq. (5) for synoptic weather stations. ·
For the more northern part of the country, and especially in the higher
western areas, the limited data available suggest that winter evaporation is very
very small. However, at the suggestion of the State Climatologist for Montana,
Mr. Joseph Caprio, a minimum value of 7 inches was established for the November
through April FWS evaporation. The Climatic Atlas of the United States (ESSA-
EDS, 1968) shows winter temperatures and dewpoints to be nearly as low in the
mountainous areas of Montana as anywhere else in the United States. With this
justification, the 7 inch value was assumed to hold as a minimum everywhere on
the November to April map.
9. ADDITIONAL INFORMATION
9.1 Long-Term Variability
Table 2 lists average 1956-70 pan evaporation for specific stations and the
comparison of these 15-year averages with averages for other periods during the
past 34 years. The table provides some information for the long-term variability
of evaporation data.
9.2 Monthly Values
A recommended method for distributing the seasonal values from the evapo-
ration maps to monthly values is to use the monthly distribution of observed pan
data from stations in the immediate area. Mean monthly pan evaporation data (for
Class A pan stations in the United States with at least 10 years of data) fill
many pages of tables and will be found in a forthcoming NOAA Technical Report. A
very brief sample of these data for the 1956-70 base period is presented in
table 3. Data in the report just mentioned are presented in inches of evapora-
tion, as are seasonal and annual values in table 3. However, the monthly data are
presented in table 3 as the mean percent of annual evaporation. These 40 stations
were chosen to generally show how the annual distribution of evaporation varies
I
throughout the 48 states. They do not form a large enough sample to show local
variations. Plots of these data are shown in figure 8.
9.3 Selected Values for Map Isopleths
The intervals between isopleths on the three maps {maps 1, 2, and 3) were
based on the variability and magnitude of the values on the maps. In the Eastern
United States, multiples of 4 inches were selected. In some areas, in which
additional information could be provided to the user, isopleths at 2 inch
intervals have been added. For the 11 Western States, a spacing of 5 inches was
17
CLASS A PAN STATION
Fairhope 2NE, Ala.
Bartlett Dam, Ariz.
Mesa Exp. Farm, Ariz.
Chula Vista, Calif.
Davis 2WSW, Calif.
Friant Govt Camp, Calif.
Lodi, Calif.
Montrose No. 1, Colo.
Wagon Wheel Gap, Colo.
Belle Glade E. S., Fla.
Tifton E. s., Ga.
Moscow, Idaho
Ames 3SW (Ames), Iowa
Bozeman Agric. Col., Mont.
Bridgeport, Nebr.
Elephant Butte Dam, N.Mex.
Jornada Exp. Range, N.Mex.
Charles Mill Lake, Ohio
Fort Supply Dam, Okla.
Tipton 4S, Okla.
Medford Exp. Sta., Oreg.
Wickiup Dam, Oreg.
Denison Dam, Tex.
Ysletta, Tex.
Wardensville RM Farm, W.Va.
Notes:
STATION
INDEX
STATE-STATION
(a)
1-2813
2-0632
2-5467
4-1758
4-2295
4-3261
4-5032
5-5717
5-8742
8-0611
9-8703
10-6152
13-0205
24-1044
25-1145
29-2848
29-4426
33-1466
34-8304
34-8379
35-5424
35-9316
41-2394
41-9966
46-9281
Table 2.--comparison of evaporation
SEASON
COMPARED
Annual
Annual
Annual
Annual
Annual
Annual
Annual
Annual
Jun-Sept
Annual
Annual
Apr-Sept
Apr-Oct
May-oct
May-Oct
Annual
Annual
Apr-Oct
May-Oct
Apr-Oct
Feb-Nov
May-Sept
Feb-Dec
Annual
May-Oc.t
ADJUSTED
AVERAGE
EVAP.
1956-70
51.0
121.3d
88.4
65.8
76.7
89.2
68.oh
58.4
26.9d
61.6
56.9
37.6d
43.1k
36.8h
40.7
116. 9k
87.2k
31.4
63.1h
74.4h
43.4h
32.7
73.2d
108.8
31.6h
a -Additional information such as latitude, longitude, and elevation can be
obtained from State Station Index in NOAA EDIS Climatological Data.
b -No ratios are computed when more than 3 years of a 15-year period are missing.
c -The left-hand number indicates the number of years in the record for the
month-of-the-year with the least data. The right hand number indicates
the maximum length of record for months with the most complete record.
d -13-year record of base period adjusted to 15 years.
18
for 15-year base period with other periods
AVERAGE EVAPORATION RATIO (b) PERIOD OF RECORD
1946-55
1956-70
0.98
1.04
1.02
0.96
0.93
1.00
0.96
1.03j
1.04
1.03
0.96
0.87
0.99
0.85
1.01
1.06
1.01
1.08
1.00
0.93
0.94
1.05
1.09j
0.97
0.98
1950-64 1965-79 Full Record
1956-70 1956-70 1956-70 DATES
0.99 0.98 8/34-12/79
1.03 0.99e 1.01 6/40-12/79
1.00 0.99 11/16-12/79
1.02 1.02 0.96 9/18-12/79
0.94f 1.04e 0.93 5/26-12/79
1.04 0.88g 0.96 5/39-10/79
1.04 1.00 1/31-12/79
1.05 0.98g 1.01 1/41-10/79
L08e 1.02 6/40-9/71
1.oog 1.03 1.02 3/40-12/79
1.oog 1.00 5/37-12/79
0.94e 0.97 6/39-9/79
0.98 1.02 4/33-10/70
1.03 0.96 5/35-10/79
1.01 1.02 5/31-9/78
1.o5f 0.95 0.94 4/16-12/79
1.05 1/53-12/79
1.06 0.96 1.04 4/39-10/79
1.03 1.01g 0.98 7/40-10/79
1.00 0.96 7/38-10/78
0.98 0.99 9/37-10/79
1.02 0.97 1.00 5/41-10/79
1.07e 1.02 10/40-11/79
1.01 0.97e 0.96 2/39-12/79
1.07 0.98 8/39-9/79
e -Numerator of ratio is a 13-year record adjusted to 15 years.
f -Numerator of ratio is a 12-year record adjusted to 15 years.
g -Numerator of ratio is a 14-year record adjusted to 15 years.
h -14-year record of base period adjusted to 15 years.
j -1946-55 mean is for 9 years.
k -12-year record of base period adjusted to 15 years.
19
YEARS(c)
42-46
38-40
61-64
61-62
49-54
39-41
27-49
15-39
30-32
37-39
36-42
26-41
35-38
42-44
45-48
62-64
21-27
39-41
39-40
38-41
32-43
35
29-40
39-41
37-41
Table 3.--Adjusted mean monthly
Percent
Map State Station
Station Name ID* Index Index Jan Feb Mar Apr
No.** No.**
Fairhope 2NE, Ala. 1 1 2813 3.7 4.8 7.8 9.8
Bartlett Dam, Ariz. 2 2 0632 3.5 4.0 6.1 8.7
Bacus Ranch, Calif. 3 4 418 3.0 3.5 6.6 8.7
Sacramento, Calif. (Met) 4 4 7630 1.8 3.1 5.4 8.4
Wagon Wheel Gap, Colo. 5 5 8742 14.0
Hartford, Conn. {Met) 6 6 3456 2.6 3.1 5.8 10.1
Tamiami Trail, Fla. 7 8 8780 5.3 5.9 8.4 10.4
Experiment, Ga. 8 9 3271 4.1 4.5 7.3 10.0
Moscow, U of I, Idaho 9 10 6152 6.8
Pocatello, Idaho 10 10 7211 1.6 2.3 5.8 8.1
Ames, Iowa 11 13 205 10.0
Toronto Dam, Kans. 12 14 8191 2.3 3.4 6.6 10.3
Tribune, Kans. 13 14 8235 9.0
Madisonville, Ky. 14 15 5067 11.1
Urbana, Ill. 15 11 8750 8.6
Woodworth State Forest, La. 16 16 9865 3.4 4.4 7.3 9.4
Caribou, Maine (Met) 17 17 1175 1.8 2.4 5.0 8.3
Rochester, Mass. 18 19 6938 8.1
East Lansing Hort. Farm, Mich. 19 20 2395 9.4
Scott, Miss. 20 22 7886 3.0 3.4 6.8 9.6
Weldon Springs Farm, Mo. 21 23 8805 9.5
Bozeman Agric. Col., Mont. 22 24 1044 7.8
Medicine Creek Dam, Nebr. 23 25 5388 9.9
Boulder City, Nev. 24 26 1071 3.1 3.7 6.4 8.9
Topaz Lake, Nev. 25 26 8186 8.4
Elephant Butte Dam, N. Mex. 26 29 2848 2.9 4.3 7.5 11.1
El Vado Dam, N. Mex. 27 29 2837 9.9 10.4
Aurora Research Farm, N.Y. 28 30 331 12.5
Chapel Hill, N.c. 29 31 1677 3.1 4.7 7.8 10.5
Wooster Exp. Sta., Ohio 30 33 9312 9.1
Canton Dam, Okla. 31 34 1445 2.6 4.0 6.8 9.9
Detroit Power House, Oreg. 32 35 2292 .4 2.2 4.4 6.4
Redfield, s. Dak. 33 39 7052 9.6
Neptune, Tenn. 34 40 6454 2.4 3.7 6.8 10.5
Grapevine, Tex. 35 41 3691 3.1 4.0 7.2 8.7
Welasco, Tex. 36 41 9588 4.1 4.8 7.3 9.3
Ysletta, Tex. 37 41 9966 3.6 4.9 7.7 13.3
Utah Lake, Utah 38 42 8973 5.7 9.1
Templeau Dam, Wis. 39 47 8589 14.3
Heart Mountain, Wyo. 40 48 4411 6.9
* Plot identification number for figure 8
** NOAA-EDIS Climatological Data
20
Class A pan evaporation for selected stations
1956-70
of Annual
May Nov Annual
May Jun Jul Aug Sep Oct Nov Dec thru thru Inches
Oct Apr
12.5 12.5 12.3 11.1 9.3 7.6 4.8 3.8 65 35 50.97
12.0 13.8 13.7 11.6 10.1 7.9 4.9 3.9 69 31 121.3
11.5 14.0 14.5 14.7 10.0 7.1 3.6 2.7 72 28 120.56
11.9 15.4 16.2 14.5 11.0 7.2 3.3 1.8 76 24 69.70
16.0 14.1 12.0 10.7 7.1 74 26 50.95
13.3 14.3 15.1 13.7 9.0 6.4 4.0 2.5 72 28 42.52
10.9 10.2 10.6 10.1 8.8 8.2 6.0 5.2 59 41 56.48
12.3 12.6 12.4 11.4 9.3 6.7 5.1 4.2 65 35 64.65
12.0 14.1 19.3 17.7 11.6 6.0 81 19 45.25
11.9 14.5 19.1 15.1 10.5 6.5 2.9 1.7 78 22 60.98
14.6 15.8 15.5 13.3 9.3 7.6 3.4 76 24 50.10
12.6 12.5 15.0 14.3 9.5 7.6 4.1 1.7 72 28 61.19
11.8 13.9 15.7 13.9 9.9 73 27 92.98
13.1 13.9 14.6 13.2 9.6 7.8 72 28 55.26
13.3 15.0 15.2 13.6 10.3 7.3 3.8 75 25 49.46
12.1 13.1 13.0 12.5 9.2 7.7 4.5 3.4 68 32 48.86
15.4 16.0 16.4 13.9 9.0 6.5 3.2 2.1 77 23 22.25
13.0 15.0 14.6 13.0 8.7 5.4 70 30 35.71
13.7 15.3 16.2 14.0 9.6 6.4 2.3 75 25 44.53
12.9 13.8 13.4 11.9 9.2 7.0 4.3 3.1 68 32 60.99
11.9 13.7 14.5 13.5 10.5 7.5 4.0 72 28 48.08
12.6 13.9 19.0 16.6 10.3 5.9 78 22 47.06
12.4 14.2 15.5 14.4 10.5 7.5 74 26 70.60
12.4 14.3 14.8 12.9 9.9 6.9 3.8 2.8 71 29 109.73
11.8 13.6 15.6 14.5 10.9 7.2 3.3 74 26 82.07
13:7 14.8 12.5 10.6 8.5 6.8 4.2 2.8 67 33 116.86
15.1 14.4 14.5 11.5 9.3 6.1 71 29 57.91
15.4 16.7 14.3 10.1 6.8 76 24 41.08
12.3 12.6 13.2 11.8 9.3 6.9 4.7 3.2 66 34 52.89
12.6 15.1 15.5 13.7 9.9 7.1 74 26 46.12
u.s 12.5 14.2 13.6 9.3 7.5 4.6 3.4 69 31 77.51
11.8 15.7 21.8 17.9 11.0 5.2 2.4 1.1 83 17 39.74
13.3 14.5 16.9 15.9 11.0 7.2 79 21 51.83
12.0 13.8 14.0 12.5 9.3 7.1 4.2 3.5 69 31 46.47
10.3 12.4 14.5 13.9 9.8 7.4 4.9 3.9 68 32 84.81
10.7 11.3 13.2 12.8 9.4 7.3 5.4 4.2 65 35 85.70
13.9 12.9 10.1 8.8 6.6 4.3 3.1 65 35 108.76
13.3 15.4 17.7 15.3 10.7 6.6 79 21 56.12
15.8 16.5 13.6 9.6 8.2 78 22 39.29
13.5 13.9 16.3 14.8 9.5 6.4 74 26 49.36
21
N
N
•23
• 33
n ~ . ' ~~3 1,, 1 I' , s.
LEGEND
Absclaaaa are In Incrementa of montha
from January to December •
Ordinates are In Incrementa of 5 percent
starting at zero.
Figure 8--Graphs of mean monthly percent of annual evaporation for 40 selected stations.
The numerical data for these stations are shown in table 3.
selected. In the desert areas of the Southwest, the interval was increased to
10 inches when the values exceeded 80 inches.
10. LIMITATION ON USE OF MAPS
10.1 Distribution of Stations
Although the current maps are based on more than 1,000 data points, the dis-
tribution of stations is not uniform (figures 1 through 3). Thus, the accuracy
of the map is also not uniform. In those areas in which there are sharp
gradients in the isopleths, the density of stations required for a given accuracy
may increase greatly.
The pan evaporation vs. elevation relations were used to a great extent in
the Western United States for extrapolating isopleths to high elevation areas and
to areas with sparse data.
Dashed lines have been used to indicate where the isopleths were extended at
least two isopleth intervals beyond the values of the last data point on the pan
evaporation vs. elevation relation. The dashed isopleths were also used for
those areas with extremely sparse data where, in the judgement of the authors,
the analyses were much less certain.
10.2 Use of Maps for Estimating Actual Lake Evaporation
Values of FWS evaporation from map 3 can be used as estimates of the average
annual lake evaporation for those lakes for which (1) there is only a negligible
change in heat storage and {2) the heat content of inflow waters is essentially
the same as that for outflow waters. Seasonal values cannot be used for estimat-
ing actual lake evaporation unless the changes in heat storage and the difference
in heat inflow and outflow are properly accounted for.
11. SUMMARY
Pan evaporation data and other estimates of pan evaporation and FWS evapo-
ration were used to prepare maps of average Class A pan evaporation and FWS
evaporation for the 48 contiguous United States. FWS evaporation is considered
to be approximately equivalent to potential evaporation from a shallow water
surface and to potential evapotranspiration from a vegetative surface with an
unlimited supply of water.
In the mountainous areas of the Western United States and in the Appalachian
region of the Eastern United States, relationships of the estimated values with
elevation were used in the preparation of the maps.
A map of coefficients for use in adjusting May-October seasonal Class A pan
evaporation to FWS evaporation was also prepared.
The publication of these maps serves to update the maps published in
Technical Paper No. 37, Evaporation Maps of the United States, by the Weather
Bureau (now the National Weather Service, NOAA) in 1959 (Kohler et al.).
23
ACKNOWLEDGMENTS
The authors extend appreciation to many who have assisted in this project.
Data tabulation and keypunching were done by Robert Tubello and Jackie Hughes.
Janice Hill and Stephen Ambrose assisted in data processing. Edward Boswell and
Stephen Ambrose made preliminary drafts of the maps and handled interactions with
Photosciences, Inc., who drafted the final maps. Stephen Ambrose assisted in
quality control of the maps. Formatting assistance and editorial counseling were
provided by Lianne Iseley and Patrick McHugh. Assistance in printing and folding
the maps was given by Robert Swink and Melissa Rector of the National Ocean
Survey.
Helpful counsel, and in some cases additional data, was provided by the follow-
ing State Climatologists or Assistant State Climatologists: Dr. Antonio Brazil
(Arizona); James Goodrich (California), who provided significant additional data
both in tables and on magnetic tape; Dr. Thomas McKee (Colorado); Dr. Myron Molnau
(Idaho); Professor Joseph Caprio (Montana), who provided some maps; Dr. N. J.
Rosenburg (Nebraska); Dr. Richard Gifford (Nevada); Dr. William P. Stephens (New
Mexico), who provided maps and some processed data; Dr. Lawrence Gates (Oregon);
Professor John Griffiths {Texas), who provided additional data; Arlo Richardson
(Utah), who provided results of extra studies; Dr. Howard Critchfield
(Washington); Robert Shaw (Iowa); Merle J. Brown (Kansas); and Amos Eddy
(Oklahoma) •
Climatologists in the Western States were contacted because the large
variations in relief influence evaporation patterns and the semiarid and arid
climates in the West have resulted in their longtime interest in pan and
potential evaporation.
Critical review and many helpful suggestions were provided by Dr. Michael D.
Hudlow, Dr. Robert A. Clark. Mr. John F. Miller, and Mr. Tor J. Nordenson.
Typing and editing has been done with the able assistance of Ruth Ripkin,
Terry Whitehead, and Darlene S. Williamson.
REFERENCES
Blaney, H.F., "Evaporation from Free Water Surfaces at High Altitudes."
Transactions ASCE, Vol. 123, 1958, pp. 385-404.
Caprio, J.M., "Preliminary Estimate of Average Annual Potential Evaporation."
Map Sheet, Plant and Soil Science Dept., Montana State University, Bozeman,
Montana, May 15, 1973.
Climatological Data (monthly and annual publications for each state), presently
published by the Environmental Data and Information Service (EDIS) of NOAA at
the National Climatic Center, Asheville, N.C. This series was published by
the Environmental Science Services Administration (ESSA), U.S. Dept. of
Commerce, from 1965 to 1970; by the Weather Bureau, u.s. Dept. of Commerce,
from 1940 to 1965; and by the Weather Bureau, U.S. Dept. of Agriculture, from
1896 to 1940.
Daughtery, J.P., Evapotranspiration Data in Texas. Report 192, Texas Water
Development Board, June 1975, 237 pp.
24
ESSA-EDS, Climatic Atlas of the United States. June 1968, 80 pp.
Goodridge, J.D., Evaporation from Water Surfaces in California. Bulletin 73-79,
DWR, State of California, November 1979, 163 pp.
Hamon, R.w., Weiss, L.L., and Wilson, w.T., "Ins.olation as an Empirical Function
of Daily Sunshine Duration." Monthly Weather Rev., 82 (6), 141-146, 1954.
Harbeck, G.E., Kohler, M.A. Jr., Koberg, G.E., et al., Water-Loss Investiga-
tions: Lake Mead Studies. Geological Survey Professional Paper 298, USGS,
1958, 100 pp., 1 Map Sheet.
Hubbard, K.G., and Richardson, E.A., Tabulation and ApPlication of Pan Evapora-
tion Data for Utah through 1976. Atmospheric Water Resources Series, UWRL/A-
79/02, November 1979, 76 pp.
Kohler, M.A., Nordenson, T.J., and Fox, W.E., Evaporation from Pans and Lakes.
Research Paper No. 38, Weather Bureau, Dept. of Commerce, Washington, D.C.,
May 1955, 21 pp.
Kohler, M.A., Nordenson, T.J., and Baker, D.R., Evaporation Maps of the u.s.
Tech. Paper No. 37, Weather Bureau, Dept. of Commerce, Washington, D.c.,
1959, 13 pp., 5 plates.
Lamoreux, W .w., "Modern Evaporation Formulae Adapted to Computer Use." Monthly
Weather Rev., January 1962, pp. 26-28.
Mustonen, S.E., and McGuiness, J.L., Estimating Evapotranspiration in a Humid
Region. Technical Bulletin No. 1389, Agricultural Research Service, USDA,
July 1968, 123 PP•
NOAA, NWS, NWS Observing Handbook No. 2, Substation Observations. Revised, NOAA,
Washington, D.C., December 1972, 77 pp.
NOAA, NWS, erations of the National Weather Service, 1979 Edition. U.S.
Government Printing Office Stock No. 00 -01 -0098-9, 261 pp.
Nordenson, T.J., and Baker, D.R., "Comparative Evaluation of Evaporation
Instruments." J. of Geophy. Res., Vol. 67, February 1962, pp. 671-679.
Peck, E.L., Influences of Exposure on Pan Evaporation in a Mountainous Area.
Ph.D. Dissertation, Utah State University, June 1967.
Penman, H.L., "Natural Evaporation from Open Water, Bare Soil and Grass."
Proceedings of the Royal Society of London, Ser. A, Vol. 193, No. 1032,
April 1948, PP• 120-145.
Pruitt, W.O., "Empirical Method of Estimating Evapotranspiration Using Primarily
Evaporation Pans." Conference Proceedings, Evaporation and its Role in Water
Resource Management, Amer. Soc. of Agricultural Engineers, St. Joseph,
Michigan, December 5 and 6, 1966, pp. 57-61.
Robinson, T.w., and Johnson, A.I., Selected Bibliography on Evaporation and
Transportation. Geological Survey Water Supply Paper 1539 R, 1961, 25 P?•
25
SCS, "Gross Annual Lake Evaporation (New Mexico)." Map Sheet, Soil Conservation
Service, 1972.
Thompson, E.S., "Computation of Solar Radiation from Sky Cover." Water Resources
~·, Vol. 12, No. 5, October 1976, PP• 859-865.
USGS, Water-Loss Investi ation: Lake Hefner Studies Technical Report.
Geo ogical Survey Professional Paper , USGS, PP•
Young, A.A., "Evaporation Investigations in Southern California." Mimeographed
Report, USDA, Pomona, California, April 1945, 89 pp.
26
'
NOAA Technical Report NWS 34
Mean Monthly, Seasonal,
and Annual Pan
Evaporation for the
United States
Washington, D.C.
December 1982
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Weather Service
NOAA TECHNICAL REPORTS
National Weather Service Series
The National Weather Service (NWS) observes and measures atmospheric phenomena; develops and distrib-
utes forecasts of weather conditions and warnings of adverse weather; collects and disseminates weather
information to meet the needs of the public and specialized users. The NWS develops the national
meteorological service system and improves procedures, techniques, and dissemination for weather and
hydrologic measurements, and forecasts.
NWS series of NOAA Technical Reports is a continuation of the former series,
Weather Bureau (WB).
Reports listed below are available from the National Technical Information
ment of Commerce, Sills Bldg., S28S Port Royal Road, Springfield, Va. 22161.
accession number (given in parentheses).
ESSA Technical Reports
ESSA Technical
Service, U.S.
Prices vary.
Report
Depart-
Order by
WB 1 Monthly Mean lOQ-, SQ-, 3Q-, and lQ-Millibar Charts January 1964 through December 196S of ~he
IQSY Period. Staff, Upper Air Branch, National Meteorological Center, February 1967, 7 p,
96 charts. (AD 6S1 101)
WB 2 Weekly Synoptic Analyses, S-, 2-, and 0.4-Mb Surfaces for 1964 (based on observations of the
Meteorological Rocket Network during the IQSY). Staff, Upper Air Branch, National Meteorologi-
cal Center, April 1967, 16 p, 160 charts. (AD 6S2 696)
WB 3 Weekly Synoptic Analyses, S-, 2-, and 0.4-Mb Surfaces for 196S (based on observations of the
Meteorological Rocket Network during the IQSY). Staff, Upper Air Branch, National Meteorologi-
cal Center, August 1967, 173 p. (AD 662 OS3)
WB 4 The March-May 196S Floods in the Upper Mississippi, Missouri, and Red River of the North Basins.
J. L. H. Paulhus and E. R. Nelson, Office of Hydrology, August 1967, 100 p.
S Climatological Probabilities of Precipitation for the Conterminous United States. Donald L.
Jorgensen, Techniques Development Laboratory, December 1967, 60 p.
WB 6 Climatology of Atlantic Tropical Storms and Hurricanes. M. A. Alaka, Techniques Development
Laboratory, May 1968, 18 p.
WB 7 Frequency and Areal Distributions of Tropical Storm Rainfall in the United States Coastal Region
on the Gulf of Mexico. Hugo V. Goodyear, Office of Hydrology, July 1968, 33 p.
WB 8 Critical Fire Weather Patterns in the Conterminous United States. Mark J. Schroeder, Weather
Bureau, January 1969, 31 p.
WB 9 Weekly Synoptic Analyses, S-, 2-, and 0.4-Mb Surfaces for 1966 (based on meteorological rocket-
sonde and high-level rawinsonde observations). Staff, Upper Air Branch, National Meteorological
Center, January 1969, 169 p.
WB 10 Hemispheric Teleconnections of Mean Circulation Anomalies at 700 Millibars. James F. O'Connor,
National Meteorological Center, February 1969, 103 p.
WB 11 Monthly Mean lOQ-, So-, 3Q-, and lQ-Millibar Charts and Standard Deviation Maps, 1966-1967.
Staff, Upper Air Branch, National Meteorological Center,·April 1969, 124 p.
WB 12 Weekly Synoptic Analyses, S-, 2-, and 0.4-Millibar Surfaces for 1967. Staff, Upper Air Branch,
National Meteorological Center, January 1970, 169 p.
NOAA Technical Reports
NWS 13 The March-April 1969 Snowmelt Floods in the Red River of the North, Upper Mississippi, and Mis-
souri Basins. Joseph L. H. Paulhus, Office of Hydrology, October 1970, 92 p. (COM-71-S0269)
NWS 14 Weekly Synoptic Analyses, S-, 2-, and 0.4-Millibar Surfaces for 1968. Staff, Upper Air Branch,
National Meteorological Center, May 1971, 169 p. (COM-71-S0383)
NWS lS Some Climatological Characteristics of Hurricanes and Tropical Storms, Gulf and East Coasts of
the United States. Francis P. Ho, Richard W. Schwerdt, and Hugo v. Goodyear, May 197S, 87 p.
(COM-7S-11088)
(Continued on inside back cover)
NOAA Technical Report NWS 34
Mean Monthly, Seasonal,
and Annual Pan
Evaporation for the
United States
Richard K. Farnsworth
and
Edwin S. Thompson
Office of Hydrology
National Weather Service
Washington, D.C.
December 1982
U.S. DEPARTMENT OF COMMERCE
Malcolm Baldrige, Secretary
National Oceanic and Atmospheric Administration
John V. Byrne, Administrator
National Weather Service
Richard E. Hallgren, Acting Assistant Administrator
CONTENTS
INTRODUCTIO~ •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 1
MEAN MONTHLY, SEASONAL, AND ANNUAL CLASS A PAN EVAPORATION
COMPILATION (TABLE I) ••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 7
MEAN MONTHLY, SEASONAL, AND ANNUAL PAN EVAPORATION COMPUTED
BY METEOROLOGICAL FACTORS (TABLE II)•••••••••••••••••••••••••••••••••••••••••62
ACKNOWLEDGM.ENTS •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 82
REFERENCES ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 82
APPENDIX A •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 4.-1
FIGURES
1. Distribution of Class A pan stations reporting observed
evaporation onlY•••••••••••••••••••••••••••••••••••••••••••••••••••••••••4
2. Distribution of Class A pan stations reporting observed
evaporation and maximum and minimum water temperature •••••••••••••••••••• 5
.3. Distribution of weather stations at which evaporation can
be estimated by the Penman equation••••••••••••••••••••••••••••••••••••••6
Al. Monthly distribution at Vaughn, New Mexico based on
evaporation distribution at Alamogordo Dam and Santa Fe •••••••••••••••• A-3
TABLES
Al. Monthly fractions of annual and seasonal evaporation at
Alamogordo Dam and Santa Fe•••••••••••••••••••••••••••••••••••••••••••·A-2
A2. Monthly potential evaporation (FWS), in inches, at Vaughn,
New Mexico •••••••••••••••••••••••••••••••• , •••••••••••••••••••••••••••• A-2
iii
MEAN MONTHLY, SEASONAL, AND ANNUAL
PAN EVAPORATION FOR THE UNITED STATES
Richard K. Farnsworth
and
Edwin s. Thompson
Hydrologic Research Laboratory
National Weather Service, NOAA
Silver Spring, Maryland
INTRODUCTION
This publication is a compilation of monthly, seasonal, and annual averages of
estimated pan evaporation based on observations from Class A pans and on meteoro-
logical measurements by the National Weather Service (NWS) and cooperating
agencies. It replaces Technical Paper No. 13 (U.S. Weather Bureau, Hydrologic
Branch, Division of Climatological and Hydrologic Services, 1950). These
tabulations were generated from the augmentation of a smaller data set used to
develop evaporation maps published in NOAA Technical Report NWS-33, Evaporation
Atlas for the Contiguous 48 United States, (Farnsworth et al., 1982). This
report and its companion report, the evaporation atlas, should facilitate the
determination of monthly values of evaporation at most points in the country.
The data set used for the evaporation atlas included, at most, 15 years of data
record. To obtain the tabulations contained in this report, the data set was
enlarged to include the available period of record (through January 1981 for
currently active stations). Therefore, while this report was produced at the
same time as the evaporation atlas, there are some significant differences in the
data used. The data sets used to produce the maps in the evaporation atlas were
selected and, in some cases, adjusted to fit a common base period of 1956-70.
For this report, the total period of record rather than a common time base was
chosen for the record of observed pan evaporation. This avoids possible errors
which might result from adjustments made to fit the common time base. Inclusion
of the additional data periods of observed pan records required only tabulation
from published records. However, the estimation of "pan" evaporation based on
meteorological measurements requires many computations, and so only estimates for
years for which the data were already prepared for computer processing (1956-70)
for the atlas were included in this report. For the same reason, coefficients of
variation of the monthly, seasonal, and annual values of the pan data were
computed only for the 1956-70 base except for stations in the state of California
which were available on magnetic tape for their full periods of record.
Evaporation means are included for only those stations that have at least 1 month
with a period of record of 10 years or more prior to January 1981. Evaporation
means for months with less than 5 years of record are omitted. Those means for
months with between 5 and 10 years of record are shown to the nearest inch. This
format should remind the user that these data cannot be treated with the same
confidence as those means with 10 years or more of record which are shown to the
nearest 0.01 inch. Actually, the latter should not be interpreted to an accuracy
greater than 0.1 inches. However, the additional decimal place was retained to
conform with published records.
1
Months with fewer than 20 observations were excluded from the analysis. This
occurred mainly where observations were not taken on weekends, observers went on
vacation, or temperatures were near or below freezing.
The data are presented in two tables. Table I lists averages based on observed
Class A pan data, and. table II lists average "pan" evaporation based on estimates
of monthly evaporation derived from hydrometeorological measurements using a form
of the Penman equation described by Kohler et al. (1955). Individual stations
listed in the tables are ordered alphabetically within their appropriate
states. The states are also listed alphabetically.
Table I data are generated primarily from data published in the series,
Climatological Data of the United States (NOAA-EDIS). Details on site operation,
including the name of the individual or agency operating the station, can be
found in the annual summaries. Measurements obtained using non-standard pans,
installations, or methods are difficult to compare with those obtained using the
standard pans and, therefore, have more limited use. Only stations using
standard Class A pans, with a standard installation, and assumed to be following
standard procedures are included in table I. The standard Class A pans are
unpainted, constructed of monel or galvanized metal, 47.5 inches in diameter,
10 inches deep, and mounted on a platform which raises the pan base a few inches
above the surrounding ground. The installation of the pan and the measurement
procedures are described in the NWS Observing Manual No. 2--Substation Observa-
tions (NOAA-NWS 1972). Approximate locations of the pans are shown in figures 1
and 2. Figure 1 shows those stations which observe only the evaporation from the
pan while figure 2 shows stations measuring, in addition to evaporation, the
temperature of the water in the pan and the total wind movement over the pan.
The values in table II are estimates based on hydrometeorological data for
stations, most of which are published in the series Local Climatological Data
(NOAA-EDIS). Details regarding individual stations are found in this publica-
tion, especially the issues which present annual summaries. As indicated previ-
ously, these data are averages of estimates of monthly Class A "pan" evaporation
derived from hydrometeorological measurements. These measurements were taken at
the stations of the NWS basic and synoptic network (NOAA-NWS 1979) which had at
least 1 month with 10 years of record during the evaporation atlas base period,
1956-70. The locations of these stations are identified in figure 3. The obser-
vations required for the evaporation estimates were mean air temperature, mean
dew point, the total wind movement 2 feet above the ground surface, and an esti-
mate of incoming solar radiation. Daily wind movement was generally estimated
from available wind speeds observed every six hours at the station anemometer
height (often around 20 feet). This estimated wind movement was then adjusted,
using a logarithmic relationship, to obtain an equivalent wind movement at
2 feet. Solar radiation was either measured directly (at those stations equipped
with pyranometers), estimated from hours of sunshine (at stations equipped with
sunshine recorders) (Hamon et al., 1954), or estimated from cloud cover (at the
remainder of the stations) (Thompson, 1976).
The monthly mean estimated pan evaporation was computed for each month using
eq. 1 of NOAA Technical Report NWS-33. A period-of-record average for each month
of the year was formed by taking the average of all the values for a given month
included in the period of record. The individual monthly sums were formed by
multiplying the daily average by the number of days in the month. The data used
to estimate each daily mean consisted of the mean daily air and dewpoint
temperature and mean daily accumulations of solar radiation (sometimes estimated
2
from sky cover) and wind travel for the month. Determination of means in this
way, using mean values of the input data rather than computing daily estimates of
pan evaporation and then computing the average, was based on the experience of
Kohler and others (Kohler et al., 1955) who stated that "experience has shown
that only minor errors result when monthly evaporation (i.e., mean daily values
for the month) is computed from monthly averages of the daily values of T , Td'
W and U (air temperature, dewpoint temperature, solar radiation, and dafly pan w~nd traeel)."
It should be noted that the annual means are computed as the sum of the indi-
vidual monthly means. This causes some bias toward higher evaporation because
the record is often not complete during months when temperatures are near or
below freezing. For example, during a year when a spring month is ·colder than
normal, observations are missed more often than usual because water in pans is
frozen or the pan has to be taken out of service. In these situations, the data
that are available for these months for computing an average represent intervals
of milder temperatures and higher evaporation. When these months of partial
record are summed into the annual or seasonal mean, they tend to bias the annual
or seasonal value high. At stations located at high elevations, only the summer
months are free from this problem. Our solution to this problem has been simply
to note the number of years of record available for each month for each station
and to caution users so that they may make subjective corrections appropriate at
that location based on their familiarity with the climate.
All of the evaporation values in these tables represent estimates of expected
evaporation occurring from a Class A pan. It has been found that evaporation
from a shallow lake, wet soil, or other moist natural surfaces is roughly
70 percent of the evaporation from a Class A pan for the same meteorological
conditions. The evaporation from shallow lakes and moist soils is generally
classified by one of the following equivalent names: free water surface evapo-
ration (FWS), lake evaporation (E 1 ), or potential evapotranspiration (PE). An
estimate of FWS which is more accurate than that given by multiplying the pan
value by 0.70, is obtained by multiplying the pan amount by the appropriate
coefficient from map 4 of the evaporation atlas described earlier. Still greater
accuracy can be achieved when the pan at which the evaporation data were observed
also has concurrent records of pan water temperature and pan wind movement. Then
FWS evaporation can be computed by methods described by Kohler et al. (1955).
One purpose of this report is to present, in convenient form, monthly means of
pan evaporation for those stations having sufficiently long records to establish
stable normal values. An important use for these records is in extrapolating to
locations where monthly estimates of evaporation are required but no measurements
have been taken. Annual and seasonal (May through October) evaporation can be
estimated from the maps in the evaporation atlas. The pan data in these tables
can be converted to free water surface (FWS) evaporation using map 4 of the
evaporation atlas. Determination of monthly values from the annual or seasonal
values is done by (1) determining the ratio of the monthly to annual evaporation
for an appropriate station having data in these tables, and (2) multiplying this
ratio by the value obtained from the map. For an example, see appendix A.
3
~ rl:ri'P _:..r.J " I t"' p
pff>rP
rf
p
p
p r p
p
p
p
p Jp
p p
p
p Jt' p
p
ppP
( p
p
p
p p
p p p
p p
p
Pp
p
p
p
p
p pP
p
../~ '! p p
p fJ
p FP p
p
,/
Figure 1. Distribution of Class A pan stations reporting observed evaporation only (water
temperature not measured or measured for an insufficiently long period of record).
&' ~.
V1
·~T
T
:-----......._
T R
)
\I~T~ R\/ R -~ lffR
'., IR. R
( ~ T
\ f \ .,.,_\ \
L\ RT T _('
\" ~ R
R
R
f'. \ --· v-
'h .i ~ -~--! "' .. -.,."' (,.. ,l' . -~-~/ l, ' j ~ ,. ·'--,.r. '---"' , , · ' ' I r·._!
T
IR
\
T i ,. ;.-. ..--.'J,." ~"--)T , \ }~
-·i · ·-•T .;~ . ....,_ \ '(:]. / c. --,--.,. .,. ~ •/ " ~ J -r-~-~ .N ':· ')('--· __ .. --/ r\:r #
I ' .,lj ·• I ; -· r T I I ~1 ~i ) .~-\ '-__,;~-f ny T /f'
T T T T T Tl.--. T i \ . ~· _..J.. / T:J T~~
T T T T T T "' T ( . T / .-· 'f '•,
T ~ \~K _ _;\ T ~
T .fy\\T ~ T ~) T\ ~ TT Trftr ,\\ ...........-v. ~-T'J'.;.,.'
T T T
T T T T
T
T
~ 'T T
T
T T
T
rf~-~ T TT { ~ T \ T . '"..--.r/'·v )
? ..._ \ r ~ T . \l T j T J'j T T~_.. '--r.-:9) t fJ._r / T ..1f:j
T ...... ,, ( T T /. ( T ].;J;I 0T Ty~' ·.~ T . I ~ l ~ ~ ~--~ /
T RJ
T '
T R ~ T ft f T I T ,_ .,.
T
i
{
H • T (.__......---( ..
r { r ,ciiii= /~" ~
.....,..
....r"'. r ,__
T ~~/:y
T
T ,
Figure 2. Distribution of Class A pan stations reporting observed evaporation and maximum and
minimum water temperatures. Stations identified by an R were not equipped with
sensors to record additional data until the latter part of the 1956-70 time base.
,..,
\~
LJ" ""!.,_.
0\ \ ,.,
" 11 IM
H
"' "' ----.,
11 " J"
"' 111 M
M
\ I I H
M M
M
M
M /":t ~.
/
t('
Figure 3. Distribution of weather stations measuring a form of air temperature, humidity, wind
movement, and radiation, where evaporation can be estimated by the Penman equation.
~
TABLE I --MEAN MONTHLY, SEASONAL, AND ANNUAL CLASS A PAN EVAPORATION (INCHES)
FOR STATIONS WITH 10 YEARS OR MORE OF RECORD FOR BEST MONTH*
Station May-Nov-Other Record Latest
State Index Oct Apr Season Annual Began Data
No. No.** Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec *** *** *** *** Mo/Yr Mo/Yr
ALABAMA
Demopolis Lock and Dam 1 2245 2.39 3.02 4.54 5.58 6.50 7.06 7.01 6.67 5.16 4.10 2.73 2.21 36.50 20.47 -56.97 8/56 11/79
32° 31', 87° 50' 14 15 20 23 23 22 22 24 24 24 23 15
**** 16 14 9 7 8 10 13 I 16 11 13 19 5 **** ****
Fairhope 1 2813 1.97 2.45 3.88 5.03 6.28 6.46 6.05 5.60 4.56 3.79 2.36 1.74 32.74 17.43 -50.17 8/34 12/79
3o• 32', a1• ss• 41 42 43 44 44 43 44 45 45 44 44 43
18 8 9 9 9 9 9 9 11 11 13 18 5 ll 5
Martin Dam 1 5140 1.90 2.43 4.06 5.04 6.21 6.38 6.28 6.21 4.96 4.01 2.53 2.09 34.05 18.05 -52.10 2/51 8/79
32• 40', as• ss• 21 27 28 28 27 29 28 27 28 27 26 25
14 14 13 7 11 9 9 10 8 2 10 17 7 **** ****
ALASKA
Central 2 50 1466 4.28 4.19 2.70 2.25 --13.42 -7/63 8/78
65° 34', 144° 49' 15 17 15 10
**** **** **** ****
Ju,;eau WSO AP 50 4100 3 3.62 4 3.34 - -16 -5/69 8/78
~.,l 58 ° 22 • • 134 ° 35. 9 11 9 10
**** **** **** ****
Matanuska Agr Exp Station 50 5733 4.62 4.38 4.16 3.16 1.95 1.61 --18.27 -8/29 8/78
61° 34', 149° 16' 26 46 47 48 46 15
**** **** **** **** **** ****
McGrath WSO AP 50 5769 4.68 4.26 2.81 - -
11.75 -5/69 8/78
62° 58', 155° 37' 10 10 10
**** **** ****
Palmer IAS 50 6870 5.05 4.77 4.66 3 2 - -
19 -4/69 9/78
61° 36'. 149° 07' 10 11 10 9 9
**** **** **** **** ****
University Exp Sta (College) 50 9641 4.84 4.88 3.04 1.41 --14.17 -5/29 8/78
64° 51'. 147° 52' 19 18 19 13
**** **** **** ****
ARIZONA
Bartlett Dam 2 0632 4.19 4.96 7.47 10.53 14.44 16.81 16.59 14.50 12.57 9.76 6.09 4.66 84.67 37.90 -122.57 6/40 12/79
33• 49', 111• 38' 38 39 39 39 39 40 40 40 40 40 40 39
28 20 21 9 8 5 8 13 12 11 16 20 5 9 5
* First line of data in the table for each station is mean evaporation in inches; second line is the number of years of record per month; and third line is the coefficient
of variation in percent (computed only when there are 10 years or more of record during 1956-1970).
** Climatolo&ical Data (NOAA-EDIS)
*** Sum of monthly means.
**** Insufficient data between 1956-70 to cmapute the coefficient of variation.
Q)
~(continued)
Davis Dam 2
35° 12', 114° 34'
Davis Dam
35° 11', 114° 34'
Douglas
31° 21', 109° 32'
Fort Valley
35° 16', 111° 44'
Hawley Lake (Hawley)
33° 59', 109° 45'
Many Farms
36° 21',109° 37'
McNary
34° 04', 109° 51'
Mesa Exp Station (Mesa)
33° 25', 111° 52'
Nogales 2 N
31° 21', 110° 56'
Page
36° 56', 111° 57'
Roosevelt 1 WNW
33 ° 40' • 111 ° 09'
Station
State Index
TABLE I --MEAN MONTHLY, SEASONAL, AND ANNUAL CLASS A PAN EVAPORATION (INCHES)
FOR STATIONS WITH 10 YEARS OR MORE OF RECORD FOR BEST MONTH*
No. No.** Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
May-
Oct
***
Nov-
Apr
***
Other
Season
***
2439
2440
2659
2 3160
2 3926
5204
5412
5467
5924
2 6180
7281
7.28
21
22
5
9
7.57
18
22
6
9
10.29
20
9
9
9
13.19
21
10
11
9
16.86
22
6
14
9
19.72
22
6
16.68
10
20.22
21
8
14.43
10
18.22
20
6
14.62
10
14.87 11.86
21 21
8 12
11.80
10
8.93
10
8.75
20
22
7.45
10
7.87
20
19
5.73
10
**** **** **** **** **** **** **** **** **** **** **** ****
2.89
62
20
3.78
20
15
3
6
****
3. 71
63
21
4.70
24
16
2.09 3.05
65 68
16 16
5.99
10
****
5.88
63
17
7.39
24
20
6
7
****
5.43
67
18
13
7
10.49 9.06
13 12
7.31
14
5.80
12
6
6
**** **** **** **** **** ****
9.54
11
****
6.87
11
6.47
13
4.82
13
3.76
11
**** **** **** ****
8
8
8.64
11
**** ****
12.65
12
****
8
9
15.42
14
****
8.36
10
6. 72
11
5.65 4.82
12 12
**** **** ****
13.64
17
12
7
9
11.19
19
15
6
9
8.73
18
9
5.01
10
5.63
17
16
4
9
**** **** **** **** **** ****
8.08
63
14
9.62
27
11
8.90
19
13
8.01
68
12
10.78
61
9
11.91
27
8
11.60
20
12
11.37
68
9
12.16
61
7
14.03
26
8
14.00
21
17
13.57
68
7
12.13
62
6
10.68
26
9
14.09
22
16
13.52
68
9
10.58
63
11
8.42
25
14
12.11
22
15
11.26
68
11
8.48
62
12
8. 27
27
18
8.84
21
13
9.07
68
13
6.01
62
11
7.14
28
14
5.54
21
10
5.87
68
11
2.96
16
****
3.75
64
24
4.67
27
12
2.40
16
****
3.08
66
8
2.74
63
19
3.78
22
20
1. 97
67
14
101.75 54.95
4 7
80 44
**** ****
52
21.92
67.31
8
60.14 27.05
4 13
60.45 33.94
13
66.08
13
64.66 23.63
6 8
Annual
***
156.70
4
124
****
38
****
38
****
87.19
6
94.39
88.29
6
Record
Began
Mo/Yr
1/56
7/48
6/65
7/62
5/68
8/51
5/68
11/16
10/52
2/64
1/16
Latest
Data
Mo/Yr
6/77
6/61
10/76
9/70
9/79
3/73
6/78
12/79
12/79
10/79
12/79
* First line of data in the table for each station is mean evaporation in inches; second line is the number of years of record per month; and third line is the coefficient
of variation in percent (computed only when there are 10 years or more of-record during 1956-1970).
Climatologi~~l Data (NOAA-EDIS) **
*** Sum of mon~n~y means.
**** Insufficient data between 1956-70 to compute the coefficient of variation.
<D
~ (continued)
San Carlos Reservoir
33° 10 •, 110° 31 •
Sierra Ancha
33° 48', 110° 58'
Snowflake 15 W
34° 3o', 110° 2o•
Steward Mountain
33° 34', 111° 32'
Tempe, University of Arizona
Citrus Exp Station
33° 23', 111° 58'
Tucson, University of Arizona
32° 14', 110° 57'
Wahweap
36° 59'. 111° 29'
Willcox 3 NNW (Willcox)
32° 18', 109° 51'
White River
33° 50.. 109° 58.
Yuma Citrus Station
32° 37', 114° 39'
Yuma Springs
32 ° 43 • • 114 ° 37 '
Station
State Index
TABLE I --MEAN MONTHLY, SEASONAL, AND ANNUAL CLASS A PAN EVAPORATION (INCHES)
FOR STATIONS WITH 10 YEARS OR MORE OF RECORD FOR BEST MONTH*
May-Nov-
Oct Apr
No. No.** Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec *** ***
Other
Season
***
2 7480
2 7876
2 8018
2 8214
2 8499
8815
9114
9334
9271
9652
9892
2.31
30
16
2.30
33
26
3.56
14
3.49
31
15
2.80
33
18
4.67
15
5.87
31
15
4.54
35
21
6.95
15
8.72
31
9
6.75
35
11
10.06
17
11.75
31
5
9.22
35
7
11
7
14.12
31
6
10.95
35
6
15
8
13.46
32
5
10.41
36
6
11
8
11.59
31
11
8.83
36
14
9.65
31
16
7.92
34
14
8.14 7.88
10 10
6.63
31
10
5.97
32
12
**** **** . **** **** ****
12.99
17
14.29
16
14.49
16
13.15
15
10.76 8.15
15 15
3.63
32
12
3.50
35
25
4.57
16
2.34
31
14
2.39
31
27
3.17
14
**** **** **** **** **** **** **** **** **** **** **** ****
1.60
25
17
2.92
51
19
3.30
19
2.92
25
14
3.92
51
16
4.64
19
4.95
25
16
6.58
51
13
7
9
7.23
25
12
9.18
51
7
9.65
13
9.64
25
10
12.17
51
12
13.75
16
11.01
25
9
13.84
51
11
15.86
16
11.22
24
6
12.55
51
8
16.50
16
9.83
24
12
10.56
51
10
15.42
17
7.78
25
11
9.33
51
13
11.20
18
5.18
25
9
2.54
25
17
6.89 4.10
51 51
16 17
8.23
17
4.53
12
**** **** **** **** **** **** **** **** ****
7.15
19
9.83
19
10.50
19
11.14
19
9.72
19
8.12
19
7.32
19
5.96
19
4.58
19
1.48
25
21
2.43
51
15
3.27
19
**** **** **** **** **** **** **** **** **** **** **** ****
3.66
50
19
4.62
50
16
3.19 4.02
13 13
6
6
8.12
12
10.04
12
11.64
12
**** **** **** ****
7.36
50
11
6.02
13
9.74
50
8
7.64
13
12.55
50
7
8.82
13
13.96
50
5
9. 72
13
9.58
12
8.65
12
7.74
12
5.85
12
3.56
12
2.37
12
**** **** **** **** **** ****
14.94
50
5
10.28
13
13.24
50
7
9.69
13
10.34
50
ll
7~60
13
7.43
51
13
4.78
51
15
5.39 3.50
13 13
3. 52
51
12
2.68
13
**** **** **** **** **** **** **** **** **** **** **** ****
67.20 26.36
4 6
53.30 22.28
4 12
53
73.83 32.98
**** ****
54.66 20.72
7 10
65.34 29.13
9 9
80.96
****
52.76 32.77
**** ****
53.50
****
72.46 33.68
5 8
51.50 27.05
**** ****
Record
Annual Began
*** Mo/Yr
93.56 7/48
4
75.58 2/36
8/67
106.81 3/61
****
75.38 9/53
7
94.47 1/29
8
1/62
85.53 1/17
****
11/67
106.14 10/20
5
78.55 1/17
****
Latest
Data
Mo/Yr
12/79
2/73
6/78
5/78
6/78
12/79
10/79
12/35
10/79
12/79
11/29
* F.lrst line of data in the table for each station is mean evaporation in inches; second line is the number of years of record per month; snd third line is the coefficient
of variation in percent (computed only when there are 10 years or more of record during 1956-1970). ·
**
***
****
Climatological Data (NOAA-EDIS)
Sum of monthly means.
Insufficient data between 1956-70 to compute the coefficient of variation.
0
Station
State Index
TABLE I --MEAN MONTHLY, SEASONAL, AND ANNUAL CLASS A PAN EVAPORATION (INCHES)
FOR STATIONS WITH 10 YEARS OR MORE OF RECORD FOR BEST MONTH*
No. No.** Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
May-
Oct
***
Nov-
Apr
***
Other
Season
***
~ (continued)
Yuma Valley
32° 43', 114° 43'
ARKANSAS
Blakely Mountain Dam
34° 36', 93° 11'
Blue Mountain Dam
35° 06', 93° 39'
Hope 3 NE (Hope)
33° 43', 93° 33'
Mountain Home, CE
36° 20', 92° 23'
Narrows Dam
34° 09', 93° 43'
Nimrod Dam
34° 57', 93° 10'
3
3
3
3
3
3
Russellville (Russellville 4 N) 3
35° 17', 93° 06'
Stuttgart 9 ESE
34° 28', 91° 25'
CALIFORNIA
Alamitos PEKC Pond
37° 15', 121° 52'
4
9657
0764
0798
3428
5038
5110
5200
6352
6920
0053
3.49 4.34
20 20
6. 77
20
8.66
20
10.38
20
11.08
20
11.72
20
10.74
19
8.47
19
6.12
19
3.99
19
3.14
20
**** **** **** **** **** **** **** **** **** **** **** ****
1 2
5 7
**** ****
2.19 2.54
22 26
**** 16
2 2.20
9 11
**** ****
1.63
21
****
1.30
26
31
0.97
19
35
2
8
****
2.15
26
14
2.02
36
19
1.46
19
22
3.18
18
19
3.48
13
4.37
24
15
4.52
13
5.53
24
10
5.50
13
5.99
24
10
6.62
13
6.63
24
9
7.10
13
5.98
24
8
6.38
13
4.22
24
15
3.28
24
14
4.34 3.06
13 13
2.09
21
21
1. 77
11
**** **** **** **** **** **** **** **** ****
4.24
32
14
3. 77
16
17
2.91
12
24
3.75
36
17
3. 79
48
20
2.69
19
16
5.07
35
14
5.38
25
11
4.68
20
12
4.44
17
17
5.04
39
15
5.18
49
16
4.03
19
18
6.11
35
8
6.15
27
10
5.62
20
12
5.21
23
23
6.00
37
19
6.17
50
16
5.31
19
12
6.77
36
9
6.83
27
7
"6.27
20
11
6.24
23
24
6.70
38
14
7.39
51
14
6.47
19
12
7.41
36
9
7.42
27
10
6.76
19
15
6. 51
23
24
7.38
37
11
7.47
51
16
6.95
19
11
6.88
34
16
6.81
27
10
6.96
19
13
6.01
23
30
6.80
38
14
6.88
51
22
6.40
19
10
5.14 4.17
36 35
21 21
5.05
27
15
5.29
19
19
4.63
23
34
5.16
38
18
5.09
51
22
4.70
17
16
3.59
27
15
3.99
19
17
3.28
23
35
3.73
38
25
3.87
51
25
3.09
18
15
2.42
32
13
2.35
16
****
2.29
17
15
2.06
19
****
2.03
35
13
2.39
49
22
1.45
18
16
1
8
****
1
6
****
1.80
29
24
1.60
13
****
1.27
28
16
1.44
35
****
0.90
18
22
58.51 30.39
**** ****
31.63
7
33.00
****
36.48 18.26
10 ****
35.85
6
34.89 17
6 ****
31.88
22
35.77 15.87
12 ****
36.87 16.12
15 ****
32.92 11.50
9 8
Record
Annual Began
*** Mo/Yr
88.90 1/17
****
1/56
1/67
54.74 2/37
****
3/53
52 11/50
****
10/43
51.64 1/37
****
52.99 6/29
****
44.42 1/60
8
Latest
Data
Mo/Yr
6/40
11/79
11/79
11/79
10/79
7/70
9/66
8/79
10/79
12/78
* First line of data in the table for. each station is mean evaporation in inches; second line is the number of years of record per month; and third line is the coefficient
**
*** ****
of variation in percent (computed only when there are 10 years or more of record during 1956-1970).
Climatological Data (NOAA-EDIS)
Sum of monthly means.
Insufficient data between 1956-70 to compute the coefficient of variation. For several California stations other years were used, but only annual or May-october
coefficients were computed.
CALIFORNIA (continued)
Alturas 2 SE
41° 03', 121° 40' (approx)
Alvarado
37° 34', 122° 07'
Amboy 3 ESE Saltus
34° 32', 115° 42'
Antioch Pump Plant
37° 59', 121° 44'
Arvin-Edison WSD
35° 13', 118° 47'
Atascadero Lake
35° 28', 120° 40'
Avenal 9 SSE
35° 54', 120° 03'
Backus Ranch
34° 57', 118° 11'
Baldwin Park
34° 06', 117° 58'
Bataques-Hyd Res -Baja Calif
32° 33', 115° 04'
Beaumont Pumping Pl (Nr)
33° 59', 116° 58'
Station
State Index
TABLE I --MEAN MONTHLY, SEASONAL, AND ANNUAL CLASS A PAN EVAPORATION (INCHES)
FOR STATIONS WITH 10 YEARS OR MORE OF RECORD FOR BEST MONTH*
May-Nov-
Oct Apr
No. No.** Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec *** ***
Other
Season
***
4 0161
4 None
4 0176
4 0232
4 0325
4 0360
4 0398
4 0418
4 0455
4 0541
4 0607
1 1 3 5
5 7 7 8
**** **** **** ****
1.42 2.22
17 17
3. 77
17
4.98
18
6 7.01
8 10
**** 16
6.76 7.40
18 18
8.39
10
7
7. 76
18
8.03
10
10
6.76
19
5.59 3.50 1
10 8 7
8 **** ****
5.37 3.75 2.07
19 19 19
1
6
****
1.42
19
**** **** **** **** **** **** **** **** **** **** **** ****
4.98
11
16
1.25
30
23
1.65
10
23
1.57
11
38
2
9
****
2.87
. 25
23
2.05
21
20
3.98
13
15
3
8
****
7.60
10
24
2.06
28
28
2.99
10
14
2.09
12
24
3.15
10
22
3. 74
25
16
2.60
21
17
4.76
13
21
3.43
13
27
11.59
11
16
4.20
30
19
4.96
11
31
3.39
11
40
6.00
11
21
6.57
25
20
3.78
21
15
7.06
13
13
4.41
14
17
14.73
10
17
6.31
30
19
6.85
10
19
5.16
10
21
9.10
11
13
10.04
26
21
4.80
21
14
8.94
13
9
5.31
14
26
18
9
****
8.99
30
13
10.98
10
17
6.57
10
22
13.07
11
9
13.15
26
10
6.38
21
15
11.85
13
8
6.61
18
9
22.02
10
10
10.76
29
10
12.52
10
13
7.83
10
5
16.54
11
18
16.61
27
12
6.93
21
12
12.44
13
7
8.39
20
17
22.76
10
9
11.64
29
11
14.06
11
8
9.29
10
12
18.96
11
11
18.27
24
9
8.66
22
8
12.60
13
7
10.67
20
11
19
9
****
10.11
27
6
12.95
11
5
8.19
10
10
16
8
****
17.09
23
11
7.99
22
8
10.83
13
16
10.08
21
14
15
9
****
7.78
29
9
9.69
11
16
5.91
10
13
12.24
11
10
12.52
24
7
6.34
22
9
8.94
12
11
8.11
21
15
11
8
****
5.02
30
14
5.98
11
12
3. 74
10
28
8.10
11
12
7.95
26
13
4.61
22
11
6.22
13
23
5.79
19
19
7
9
****
2.05
30
20
3.03
11
20
9
****
3.93
11
13
4.33
26
17
3.11
22
18
4.80
13
32
3.54
17
21
5
8
****
1.48
30
68
1.81
11
29
1.54
10
46
2.31
11
26
2.99
24
28
2.20
22
16
3.31
13
29
3.11
13
22
39 12
**** ****
37.78 15.88
**** ****
108 50
**** ****
54.30 17.35
14
66.18 21.29
8 9
4!.53 16
**** ****
85 26
**** ****
85.59 30.54
11
40.91 18.54
10
62.88 32.84
10
49.65 23
8 ****
Record
Annual Began
*** Mo/Yr
51 6/57
****
53.66 8/24
****
159 1/67
****
71.65 1/49
8
87.47 3/67
4
58 1/64
111 9/50
****
116.13 6/36
6
59.45 7/32
6
95.72 1/64
5
73 1/55
****
Latest
Data
Mo/Yr
10/67
4/42
11/77
12/78
12/77
2/79
7/61
6/62
12/53
12/76
9/75
* First line of data in the table for each station is·mean evaporation in inches; second line is the number of years of record per-montll; and -third line is the coefficient
**
***
****
of variation in percent (computed only when there are 10 years or more of record during 1956-1970).
Climatological Data (NOAA-EDIS)
Sum of monthly means.
Insufficient data between 1956-70 to compute the coefficient of variation. For several California stations other years were used, but only annual or May-Dctober
coefficients were computed.
1\)
CALIFORNIA (continued)
Casitas Dam
34° 22', 119° 20'
Castiac Dam Headquarters
34° 30', 118° 37'
Cotheys Val Bullrun R
37° 24', 120° 03'
Cedarville 12 SE
41° 27', 119° 59'
Chico Experiment Station
39° 42', 121° 47'
Chula Vista
32° 36'' 117° 06'
Corcoran El Rico 1
36° 03', 119° 39'
Coyote Reservoir
39° 11', 123° 11'
Crane Valley PH 3r 17', 119° 32'
Cuyamaca-Helix I.D.
32° 59', 116° 35'
Davis 2 WSW (non-irrigated)
38° 32', 121° 46'
Station
State Index
TABLE I --MEAN MONTHLY, SEASONAL, AND ANNUAL CLASS A PAN EVAPORATION (INCHES)
FOR STATIONS WITH 10 YEARS OR MORE OF RECORD FOR BEST MONTH*
May-Nov-
Oct Apr
No. No.** Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec *** ***
Other
Season
***
4 1558
4 1562
4 1588
4 1614
4 1715
4 1758
4 2013
4 2105
4 2122
4 2239
4 2294
2.28 2.99
18 18
24 23
4.02 4
10 8
19 ****
1.26
13
30
1.33
21
37
1.89
13
22
1.99
23
22
2.85 3.35
61 61
15 12
0.87
17
45
1.42
19
36
1. 77
17
35
1.89
19
16
1.57 1.81
20 20
35 35
1.34 2.12
49 53
33 31
4.41
18
15
6
9
****
3.39
13
19
3.77
26
18
5.00
61
9
4.25
17
22
3.31
19
13
2.87
21
27
3
5
****
4.12
53
23
5.47
18
15
6.38
10
23
5.28
13
28
5.66
26
21
5.99
61
10
6.57
19
26
5.12
17
23
4.13
22
36
4.92
12
20
6.34
53
25
6.10
18
15
8.07
10
19
8.82
13
16
8.31
28
16
6.85
61
9
10.63
20
12
7.48
17
13
6.57
22
25
7.09
14
18
9.07
53
19
6.61
18
15
8.78
11
14
11.22
13
12
9.17
11
20
10.07
28
15
6.97
61
8
12.64
20
10
9.88
18
9
8.27
18
10
10.28
11
13
13.43
13
6
13.27
11
7
11.30
28
8
7.60
61
5
13.74
20
10
11.77
18
8
8.03
18
8
10.00
11
11
11.97
13
7
11.46
10
16
9.65
28
10
7.32
61
6
12.28
20
12
10.59
18
10
8.78 11.46 10.94
22 22 22
16 10 10
9.57
15
10
10.83
53
14
10.28
15
14
11.73
53
10
9.69
15
12
10.38
53
10
6.14 5.04 2.99
19 18 18
15 17 17
8.11
11
14
6.54 4.92
11 11
16 22
8.78 5.31
13 13
11 10
8.62 5
10 6
9 ****
7.37 4.50
28 26
11 16
2.09
13
17
1.94
24
36
6.11
62
8
4.89 3.62
62 62
10 11
8.23 5.28 1.97
20 17 16
26 19 41
7.87
18
10
4.61
18
14
1.89
18
20
8.35 5.16 2.60
21 21 21
12 17 44
7.56 5.28 3.54
16 16 10
14 14 13
8,35 5.51
53 54
13 18
2.55
54
30
2.17
18
17
3.90
11
15
1.10
13
33
1. 31
18
72
2.42
62
13
0.75
15
51
1.14
18
22
1. 54
21
47
2
6
****
1.32
49
36
40.19 20.31
9 10
51.78 29
9 .....
59.53 15.01
6 14
48
51.20 15.99
9 13
39.74 23.62
5
62.80 62.80
10 22
52.20 14.77
4 10
51.26 14.52
9 22
49.47
7
55.87 17.79
11 16
Record Latest
Annual Began Data
*** Mo/Yr Mo/Yr
60.50 9/59 9/77
9
81 6/68 12/78
****
74.54 12/65 11/78
6
6/60 7/70
67.19 5/51 10/79
6
63.36 9/18 12/79
4
80.60 1/59 10/78
10
66.97 1/60 3/79
4
65.78 4/57 8/78
9
4/46 4/79
73.66 5/26 12/79
11
* First line of data-in the table for each station is mean evaporation in inches; second line is the number of years of record per month; and third line is the coefficient
**
***
****
of variation in percent (computed only when there are 10 years or more of record during 1956-1970).
Climatological Data (NOAA-EDIS)
Sum of monthly means.
Insufficient data between 1956-70 to compute the coefficient of variation. For several California stations other years were used, but only annual or May-October
coefficients were computed.
""
CALIFORNIA (continued)
Davis Hydromet (irrigated)
38" 32', 121" 46'
Death Valley
36° 28', 116" 52'
Delano Gov Camp
35° 49'. 119" 11'
Don Pedro Reservoir
37" 43', 120° 24'
Duttons Landing
38" 12', 122" 18'
Eagle Rock Res
34" 09', 118" 11'
El Toro -Moulton Ranch
33" 36', 117" 42'
Encino Reservoir
34" 09', 118" 31'
Fall River Mills In take
41" 01', 121" 28'
Ferndale 2 NW
40" 36', 124" 17'
Finley 1 SSE
38" 59'. 122" 52'
Station
State Index
TABLE I--MEAN MONTHLY, SEASONAL, AND ANNUAL CLASS A,PAN EVAPORATION (INCHES)
FOR STATIONS WITH 10 YEARS OR MORE OF RECORD FOR BEST MONTH*
May-Nov-
Oct Apr
No. No.** Jan Feb Mar Apr May Jun Ju1 Aug Sep Oct Nov Dec *** ***
Other
Season
***
4 2294
4 2319
4 2346
4 2473
4 2580
4 2605
4 2821
4 2830
4 2964
4 3030
4 3056
1.53 2.36
18 17
23 23
4.50 6.19
17 17
21 24
1.38 2.13
22 25
45 26
1.30 2.17
26 26
25 18
1.50 2.13
24 24
26 21
3.62 3.66
22 22
26 32
1.97
12
29
2.91
28
32
1
6
****
0.71
11
22
0.94
16
20
2.17
11
30
3.23
28
24
1.42
12
38
1.18
10
25
1. 57
16
29
4.49
17
20
10.45
18
15
4.49
25
21
4.06
26
20
3.85
24
19
4.96
22
19
3.90
11
38
4.72
28
23
3.03
24
23
2.28
11
12
2.95
16
17
6.69
18
22
14.31
18
10
7.05
25
20
6.06
26
25
5.83
23
22
5.59
22
16
4.88
11
24
5.98
28
14
5.04
28
19
3.23
11
15
4.65
16
22
8.98
18
15
10.24
18
14
19.05 21.47
19 19
9 7
10.39
25
12
9.65
26
18
8.03
23
13
5.91
22
13
5.83
11
12
7.36
28
14
7.40
29
16
3.94
11
10
7.09
15
14
12.32
26
. 10
12.28
28
14
9.41
23
12
6.57
22
17
7.20
10
14
8.03
28
10
9.06
29
17
4.37
11
14
8.11
15
12
10.55
19
7
9.25
19
7
23.99 21.32
19 19
7 7
12.80
23
9
14.72
28
8
9.49
23
9
8.54
23
9
8.66
10
9
10.55
29
7
12.20
29
9
4.57
11
10
9.33
15
7
10.75
24
9
12.95
28
8
8.58
23
12
8.19
23
10
7.60
10
18
10.00
29
7
10.75
30
8
4.09
11
9
8.15
15
11
7.59 5.47
19 19
9 15
2.56
19
23
16.08 11.27 6.23
19 19 19
9 9 21
8.07
22
12
5.35 2.48
25 24
18 34
9.72
28
9
6.06
27
17
6.93 4.72
23 23
12 18
2.36
27
22
2.32
24
27
6.77
23
14
5.43 4.17
22 22
17 16
5.55 4.2q 2.76
10 12 12
29 39 44
8.58 6.30 4.72
28 28 28
13 12 24
7.13 3.86
30 29
13 17
3.58 2.05
11 10
7 10
5.83 3.43
15 16
8 19
1.30
18
29
1.02
10
20
1.38
16
23
1.57
19
37
4.27
19
20
1.42
25
54
1.30
27
45
1.50
24
40
3.50
22
17
1.73
12
36
3.23
28
26
1
8
****
0.75
10
23
0.83
16
29
52.08 19.16
7 13
113.18 45.96
6 9
59.68 18.95
7 18
65.38 17.25
8 16
47.16 17.13
8 15
41.41 25.50
7
39.13 17.49
15 26
50.82 24.79
5 12
50.40 13
8 ****
22.60 9.17
4 ****
41.94 12.32
7 11
Record Latest
Annual Began Data
*** Mo/Yr Mo/Yr
71.24 7/59 12/78
8
159.14 5/61 12/79
6
78.63 10/52 11/78
9
82.63 6/50 8/78
9
64.29 11/55 3/79
10
66.91 7/56 9/78
4
56.62 10/65 5/77
18
75.61 7/32 8/60
5
63 8/25 9/54
****
31.77 1/63 9/73
****
54.26 10/63 4/79
6
* First line of data in the table for each station is mean evaporation in inches; second line is the number of years of record per month; and third line is the coerficient
of variation in percent (computed only when there are 10 years or more of record during 1956-1970).
** Climatological Data (NOAA-EDIS)
*** Sum of monthly means.
**** Insufficient data between 1956-70 to compute the coefficient of variation. For several California stations other years were used, but only annual or May-october
coefficients were computed.
~
CALIFORNIA (continued)
Fleming Fish and Game
40" 21', 120" 18'
Florence Lake
37" 16', 118" 58'
Folsom Dam
38" 42', 121" 10'
Fresno State University
36" 49', 119° 44'
Friant Gov Camp CP
36" 59', 119" 43'
Fullerton AP
33" 52', 117" 24'
Gibraltar Dam
34° 31 1
0 119° 42 I
Hayfield Pump Plant
33" 42', 115" 28'
Henshaw Res
33" 14', 116" 46'
Hetch Hetchy
37" 57', 119" 47'
Highland Farm
35" 38'. 120" 16'
Station
State Index
TABLE I --MEAN MONTHLY, SEASONAL, AND ANNUAL CLASS A PAN EVAPORATION (INCHES)
FOR STATIONS WITH 10 YEARS OR MORE OF RECORD FOR BEST MONTH*
May-Nov-
Oct Apr
No. No.** Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec *** ***
Other
Season
***
4 3087
4 3093
4 3113
4 3257
4 3261
4 3289
4 3401
4 3855
4 3914
4 3939
4 3951
1.26
13
45
0.90
24
20
1.14
10
27
1.42
13
31
1.62
24
29
2.05
10
26
1.38 2.08
39 39
28 21
2.76 3.07
42 42
34 26
1.42
23
25
2.09
23
24
5.00 5.91
11 11
24 18
1.81
18
25
2.64
18
21
3.19 3.19
10 10
60 21
2.44
13
25
3.46
24
17
3.94
10
26
3.95
40
18
4.41
42
18
3.74
23
20
9.45
11
12
3.98
19
25
4.61
10
27
5.28
16
18
3.94
13
14
5.38
24
22
5.90
10
15
6.15
40
22
5.39
42
15
5.08
23
15
12.95
11
9
5.31
18
18
5.08
10
18
7
9
****
7.40
17
12
5.87
13
10
8.09
24
14
8.58
10
13
8.15
18
11
7.76
13
10
10.13
24
12
10.31
10
11
10.09 13.28
41 41
15 14
6.57
42
14
6;73
23
11
17.09
12
7
7.20
16
12
5.59
17
20
11
9
****
7.24
41
13
7.80
23
9
18.82
12
5
9.06
16
11
7.24
25
15
14
9
****
9.96
18
7
8.66
13
8
11.46
24
7
10.94
10
7
15.55
40
11
8.74
41
9
9.69
23
7
19.84
12
6
11.22
18
9
8.90
27
7
17
9
****
8.94
18
13
8.19
13
7
10.18
24
11
9.17
10
6
13.57
41
11
7.99
41
9
9.13
23
6
17.17
12
9
9.96
18
9
7.95
27
13
15
9
****
6.46 3.62
18 18
11 11
6.14 4.13
13 13
9 20
2.36
13
21
7.66 4.96 2.03
24 24 24
8 19 23
6.69 4.21
11 11
5 10
2.05
11
20
9.68 6.03 2.80
41 41 40
10 16 27
6.46 4.96 3.58
41 41 41
14 16 27
7.56 5.08 2.80
23 21 21
6 8 15
14.88 11.02
12 12
8 6
7.24 4.72
17 18
15 25
6.02
26
13
3.54
23
27
7.36
12
15
2.76
17
25
11 7.95 4.60
9 10 10
**** 15 21
1. 54
13
32
0.94
24
29
1.02
11
26
1.33
40
37
2.68
41
25
1.38
21
20
4.84
12
11
1.97
16
33
3.58
10
48
44.53
6
40.75 12.96
5 13
52.48 14.33
7 11
49.90 16.10
5 16
68.20 17.69
15 16
41.96 21.89
7 12
45.99 16.51
5 12
98.82 45.51
5 9
49.40 18.47
7 13
39.24
76 26
**** ****
Record Latest
Annual Began Data
*** Mo/Yr Mo/Yr
53.71
6
66.81
6
66.00
5
85.89
11
63.89
7
62.50
6
144.33
6
67.87
6
102
****
6/61 4/79
10/46 9/59
1/56 12/79
9/68 12/78
5/39 10/79
1/35 5/77
10/31 9/54
5/34 12/45
7/59 4/79
8/49 10/77
10/69 3/79
* F:l.rst-line of data in the table for each station is mean evaporation in inches; se-cond line is the number of-years of record per month; and third line is the coefficient
of variation in percent (computed only when there are 10 years or more of record during 1956-1970).
** Climatological Data (NOAA-EDIS)
*** Sum of monthly means.
**** Insufficient data between 1956-70 to compute the coefficient of variation. For several California stations other years were used, but only annual or May-october
coefficients were computed.
01
CALIFORNIA (continued)
Hogan Dsm
38° 09'. 120° 49'
Huntington Beach -Heil
33• 43', us• o2•
Huntington Lake
37° 14', ll9° 13'
Indio Date Garden
33° 43', ll6° 15'
Irvine Co Automatic
33° 40', 117° 40'
Isabella Dam
35° 39', 118° 29'
Jaclcson 1 NW
38° 12', 120° 47'
.JIItlcal Dam
34° 29', 119° 31'
Kaiser Pass
37° 17', 119° 06'
Kettleman City
35° 06', 119° 58'
Knights Ferry 2 ESE
37° 48', 120° 39'
Station
State Index
TABLE I --MEAN MONTHLY, SEASONAL, AND ANNUAL CLASS A PAN EVAPORATION (INCHES)
FOR STATIONS WITH 10 YEARS OR MORE OF RECORD FOR BEST MONTH*
May-Nov-
Oct Apr
No. No.** Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec *** ***
Other
Season
***
4 4018
4 4173
4 4176
4 4259
4 4300
4 4303
4 4321
4 4422
4 4443
4 4534
4 4590
1.38 2.13
18 18
18 15
1.97
10
33
1.02
13
53
2.83
20
18
2.44
11
25
1.06
13
41
4.43
20
13
2.56 3.07
26 27
30 30
2.05 2.68
24 23
24 22
1.18
12
29
1.02
48
77
1.18
13
35
1.85
29
24
0.98
16
28
1.89
12
27
1.57
48
71
1. 30
13
27
2.99
28
25
1. 77
18
22
3.90
20
14
3.74
11
20
1.85
13
33
7.26
21
10
4.25
27
20
4.57
25
19
3.43
12
14
2.64
47
32
2.01
13
25
5.83
28
17
3.23
19
19
5.75
19
22
4.72
11
15
3.27
13
16
9.91
21
10
5.24
27
15
6.61
29
20
4.69
12
23
3.67
47
26
3.31
13
17
8.50
29
17
5.24
18
23
8.46
19
17
6.65
11
11
5.24
13
13
12.82
21
6
5.98
27
15
9.76
29
15
7.05
12
12
4.84
48
23
5.04
13
11
12.09
29
11
8.11
20
15
10.87
20
10
7.20
11
15
6.89
13
11
14.76
21
10
6.57
27
15
12.60
29
12
9.61
12
12
6.06
47
22
6.73
13
10
14.33
29
12
10.35
19
14
13.11
20
8
7.76
11
11
8.39
13
10
14.81
21
9
7. 72
25
11
14.57
29
12
12.28
11
6
7.05
48
19
8.27
13
9
16.57
27
11
12.25
18 .
9
11.73
20
9
7.17
11
6
7.60
13
9
13.46
21
ll
7.40
26
9
13.15
29
ll
11.02
ll
8
6.38
48
23
7.20
13
9
8.82 5.90 2.36
19 19 19
10 17 27
6.26 4.53 3.19
12 12 11
13 19 27
5.55 3.70 2.09
13 13 13
10 16 21
10.66 7.55 4.00
21 21 20
11 12 13
5.90 4.41
26 26
12 15
3.22
26
26
9.65 6.22 3.27
29 28 26
13 16 19
8.03
11
6
5.24 2.10
11 10
18 43
5.04 3.07
48 48
28 35
1.65
48
84
5.59 3.58 2.09
13 13 13
15 17 19
14.69 10.87 7.48 3.58
27 28 28 29
II II 13 22
10.71
18
7
7.83 4.88 1.85
19 19 19
8 17 28
1.30
18
31
2.01
12
18
1.34
13
33
2.55
21
19
2.52
26
33
1.97
25
23
1.02
11
59
0.83
48
70
1.46
13
27
1.85
29
31
0.91
17
34
58.89 16.82
5 12
39.57 18.07
10 ****
37.37 10.63
4 14
74.06 30.98
8 9
37.98 20.86
8 12
65.95 21.15
9 13
53.23 14.81
5 19
32.44 11.33
19 26
36.41 11.35
12
76.41 24.60
9 10
54.13 13.98
11 19
Record Latest
Annual Began Data
*** Mo/Yr Mo/Yr
75.71 3/59 3/79
5
57.64 9/34 12/45
****
48.00 10/46 9/59
4
105.04 3/59 12/79
7
58.84 2/46 6/72
8
87.10 7/49 6/78
10
68.44 1/59 6/70
7
43.77 2/31 1/79
18
47.76 10/46 9/59
6
102.13 10/49 11/78
9
68.11 3/59 7/78
10
* First line of data in the table for each station is mean evaporation in inches; second line is the number of years of record per month; and third line is the coefficient
**
***
****
of variation in percent (computed only when there are 10 years or more of record during 1956-1970) •.
Climatological Dsta (NOAA-EDIS)
Sum of monthly means.
Insufficient data between 1956-70 to compute the coefficient of variation. For several California stations other years were used, but only annual or May-october
coefficients were computed.
m
CALIFORNIA (continued)
Lake Bard
34" 15', 118" 50'
Lake Curry
38° 21', 122" 07'
Lake Mathews
33° 51', 117" 27'
Lake O'Neil-Camp Pendleton
33" 20', 117" 19'
Lakeport
39" 02', 122" 50'
Lakeshore
40" 53', 122" 23'
Lakeside 2 E
32" 51', 116" 53'
Lake Solano
38" 30', 122" 30'
Lake Spaulding Dam
39" 20', 120" 38'
Laroy Anderson Dam
37" 10', 121" 38'
Lexington Reservoir
37" 11', 121" 59'
Station
State Index
TABLE I --MEAN MONTHLY, SEASONAL, AND ANNUAL CLASS A PAN EVAPORATION (INCHES)
FOR STATIONS WITH 10 YEARS OR MORE OF RECORD FOR BEST MONTH*
May-Nov-
Oct Apr
No. No.** Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec *** ***
Other
Season
***
4 4673
4 4677
4 4689
4 4694
4 4701
4 4709
4 4710
4 4712
4 4714
4 4916
4 4922
5.00 4.41
10 10
32 30
1.34
15
19
2.01
14
32
3.11 3.23
40 40
39 31
3.19 3.31
26 26
25 32
1 1
9 9
**** ****
1.14
10
34
1.65
19
21l
3.23 3.74
13 13
17 16
1.85 2.87
16 16
20 34
0.98
12
31
1.02
19
33
1.26
12
11
1.46
19
30
5.51
11
22
3.46
15
22
4.49
40
21
4.49
26
22
2.17
10
28
3.11
23
18
4.84
12
13
5.04
16
20
2.44
12
18
2.48
19
28
6.61
11
22
5.04
15
20
5.55
40
22
5.63
26
26
3.90
11
30
5.00
20
14
6.18
14
14
7.37
16
25
3.62
12
21
3.58
19
24
7.28
11
14
7.16
15
16
7.32
40
15
6.18
25
14
5.87
11
16
6.30
24
12
7.36
12
11
10.66
16
12
7.36
12
14
5.31
13
13
4.96
19
19
8.19
11
21
8.98
15
9
8.54
40
17
6.89
26
13
6.85
12
12
7.68
24
12
8.70
12
14
12.18
16
9
9.29
26
25
6.50
13
15
6.50
19
19
9.72
11
9
10.31
15
9
9.13
11
13
9.57
15
7
10.59 10,12
39 39
14 11
8.54
24
15
8.46
12
8
10.00
23
7
8.27
26
21
7.72
12
14
9.02
23
10
10.55 10.00
11 11
6 6
12.87
17
5
11.81
25
18
7.44
13
10
7.36
19
16
11.36
17
8
10.71
28
22
6.61
13
15
6.65
19
19
7.36 7.36 6
11 10 9
18 22 ****
7.28 4.92
15 14
13 14
7.95 5.91
40 40
14 18
2.52
14
26
3.98
39
29
7.01
26
22
5.35 3.1l6
26 26
18 28
5.55 2.56 0.67
12 10 10
12 14 41
6.61
23
9
3.54
23
17
1.54
18
21
7.68 6.26 4.37
10 11 10
17 12 14
9.01
17
11
5.98
16
13
8.23 5.91
28 19
26 32
4.96 3.15
12 12
15 24
5.04 3.03
18 17
20 29
2.62
16
24
1.37
12
25
1.65
18
40
5.43
10
24
1.38
15
21
3.07
39
35
3.31
26
30
1
9
****
1.02
13
32
3.27
11
14
1.78
16
44
0.91
12
25
0.94
17
40
49.03 33
**** ****
48.22 15.75
7 14
50.43 23.43
9 18
42.24 23.79
9 16
37.01 10
**** ****
43.15 13.46
7 ****
50.55 25.63
4 9
62.06 21.53
4 12
53.31
9
33.97
11
33.54
16
10.58
10
11.13
19
Record Latest
Annual Began Data
*** Mo/Yr Mo/Yr
82 3/67 9/77
****
66.97 1/31 12/45
8
73.86 1/39 10/78
11
66.03 3/53 3/79
11
47 6/48 9/70
****
56.61 1/48 6/72
****
76.18 4/66 4/79
3
83.59 7/63 12/79
4
6/49 6/78
44.55 5/66 8/78
9
44.67 1/60 8/78
16
* First line of data in the table for each station is mean evaporation in inches; second line is the number of years of record per month; and third line is the coefficient
of variation in percent (computed only when there are 10 years or more of record during 1956-1970).
** Climatological Data (NOAA-EDIS)
*** Sum of monthly means.
**** Insufficient data between 1956-70 to compute the coefficient of variation. For several California stations other years were used, but only annual or May-october
coefficients were computed.
......
CALIFORNIA (continued)
Little Panoche Oat Dam
36" 41', 120" 48'
Livermore Sewage Plt.
37" 41', 121" 48'
Lodi
38" 07', 121" 17'
Los Algodones
32. 42', 114. 44'
Los Banos Field Sta
37" 01 ', 120" 54'
Los Banos Dst ~esv
37" 03', 121" 04'
Lost Hills
33" 57', 119" 41'
Madera ID Yard
36" 55', 120" 01'
Mandeville Island
38° 02', 121" 34'
Manteca
37" 48', 121" 12'
Merced 5 SE
37" 16', 120" 23'
Station
State Index
TABLE I --MEAN MONTHLY, SEASONAL, AND ANNUAL CLASS A PAN EVAPORATION (INCHES)
FOR STATIONS WITH 10 YEARS OR MORE OF ~ECORD FOR BEST MONTH*
Hay-Nov-
Oct Apr
No. No.** Jan Feb Mar Apr Hay Jun Ju1 Au~ Sep Oct Nov Dec *** ***
Other
Season
***
4 4979
4 4996
4 5032
4 5107
4 5117
4 5120
4 5151
4 5233
4 5296
4 5303
4 5532
1.77 2.87
11 13
13 23
1.61
17
32
1.10
47
27
4.69
16
15
2.32
17
28
1.93
49
24
5.36
16
22
1.34 2.28
28 28
42 29
1.74
11
28
1.61
11
29
2.69
11
20
3.07
11
37
1.30 2.01
16 15
22 22
1.14 2.40
10 10
29 28
1.22
14
17
1.73
14
20
1 2.01
9 10
**** 15
5.79
13
18
4.21
16
22
3.85
49
17
7.76
16
13
4.72
28
24
5. 75
11
28
5.91
10
26
4.17
16
16
4.69
10
20
3.98
13
20
4.06
10
7
8.62
12
22
5.98
16
27
6.01
49
19
10.67
16
10
7.44
28
26
9.50
11
18
9.02
10
18
7.09
16
21
6. 77
10
19
6.30
13
18
5.83
10
19
13.66
11
14
8.62
16
18
8.82
47
11
13.39
16
6
11.42
28
15
14.80
11
12
15.83
11
13
10.04
16
15
10.49
47
8
14.33
16
9
13.82
28
13
17.16
11
7
17.09 15.65
12 12
11 11
11.77
17
10
11.32
48
8
14.13
16
7
14.96
29
14
18.54
12
7
10.55
17
12
9.71
49
10
12.72
16
9
12.87
30
14
15.83
12
12
13.46
10
14
16 18.46 15.59
11
13
9 11
**** 12
11.46 13.07
16 16
14 11
8.78 10.63
11 10
13 13
9.25
14
11
10.28
14
13
8.78 10.67
10 10
10 10
14.80
16
13
11.38
10
10
11.57
14
5
12.01
10
8
12.48
17
17
9.92
10
8
10.24
14
10
10
9
****
11.65
12
12
8.03
17
13
7.09 2.95
12 11
22 22
5.51
16
1R
2.56
17
26
7.29 4.41 1.96
49
22
49 48
9 13
10.43
16
11
9.41
28
13
12.17
12
9
8.11
16
12
5.87
29
13
5.31
16
14
2.40
28
24
7.26 3.17
12 12
11 21
11.65 7.72 3.54
11 11 11
13 12 18
9.49
15
14
7.52
10
12
5.35 2.24
15 14
1R 16
5.20 2.52
10 10
16 21
7.56 4.17 1.85
14
21
14 14
19 14
7 5 2
9 9 9
**** **** ****
1.81
10
45
1. 57
17
37
1.06
46
33
4.33
16
18
1.26
28
30
1.94
12
21
1.81
11
42
1.22
15
17
1.18
10
40
1.18
14
28
1
9
****
80.97 23.81
10 ****
54.52 18.25
10 15
52.04 15.91
6 12
73.11 38.12
6
68.35 19.44
12 16
85.76 24.79
3 14
83 24.96
**** ****
66.65 18.03
11 11
53.43 18.70
8 ****
53.07 16.26
4 15
53 16
**** ****
Record Latest
Annual Began Dsta
*** Mo/Yr Mo/Yr
104.78 2/63 5/75
****
72.77 7/62 2/79
9
67.95 1/31 12/79
6
111.23 1/61 12/76
6
87.79 8/49 8/78
11
110.55 7/68 12/79
4
108 7/49 11/78
****
84.68 8/49 8/78
11
72.13 5/55 5/65
****
69.33 5/65 2/79
5
69 2/59 7/68
****
-.---First line of data in the table for each station is mean evaporation in inches; second line is the number of years of record per month; and third line is the coefficient
of variation in percent (computed only when there are 10 years or more of record durin~ 1956-1970).
** Climatological Data (NOAA-EDIS)
*** Sum of monthly means.
**** Insufficient data between 1956-70 to compute the coefficient of variation. For several California stations other years were used, but only annual or May-october
coefficients were computed.
CD
CALIFORNIA (eontinued)
Mexicali Hydro Res, Baja Cal
32° 40', 115° 48'
Mockingbird Res
33° 54'. 117° 25'
Mojave
35 ° 03 I, 1!8 ° J 0 I
Monticello Dam
38° 30'. 122° 07'
Morris Dam FC 3908
34° 11', 117° 53'
Nacimiento Dam
35• 46', 12o• 53'
Newville 1 E
39° 48', 122° 30'
Oakdale-Woodward Dam
37• 51', 120• 53'
Oroville Dsm
39° ?2', 121° 29'
Perris Res Evap
33° 50', 117° 12'
Pilot Rock Evap
34 O 16 I 0 117 ° 17 I
Station
State Index
TABLE I --MEAN MONTHLY, SEASONAL, AND ANNUAL CLASS A PAN EVAPORATION (INCHES)
FOR STATIONS WITH 10 YRARS OR MORE OF RECORD FOR BEST MONTH*
Hay-Nov-
Oet Apr
No. No.** Jan Feb Mar Apr Hay Jun Jul Aug Sep Oct Nov Dee *** ***
Other
Season
***
4 5570
4 5736
5756
4 5818
4 5871
4 6056
4 6178
4 6305
4 6527
6818
4 6868
2.72
16
12
3.31
37
69
3.66
16
13
3.07
37
64
1.14 1.85
!3 12
27 34
2.24 2.28
19 19
30 26
1.65
21
28
2.32
20
30
1.73 2.56
11 11
31 40
1.14
42
32
1.22
21
29
3.86
14
41
2.13
12
47
!. 77
44
22
1.97
21
26
3.94
14
27
3.15
16
30
6.10
16
8
3.35
36
71
7
7
****
3.27
12
19
3. 78
18
30
3.94
22
22
4.17
12
21
3.39
41
15
3.54
20
19
5.35
14
22
4.84
16
25
8.11
16
8
3.94
36
74
10
8
****
4.96
12
27
4. 72
19
18
5.63
21
20
6.42
12
27
5.31
45
20
5. 31
19
28
6.38
14
25
5.63
17
29
10.71
16
4
4.65
37
63
13.86
12
10
7.36
12
9
6.06
18
17
7.95
22
11
9.49
12
16
9.29
42
13
8.03
19
17
8.58
14
12
7.60
18
19
12.09
16
5
5.31
37
. 59
15.91
13
9
9.41
12
13
7.05
19
16
9.96
22
11
12.40
12
10
12.28
43
11
10.24
20
10
10.47
14
19
9.48
!'I
13
12.13
16
5
7.01
38
54
10.59
16
10
6.65
38
50
17.60 15.79
13 12
8 12
11.30 10.16
12 12
7 6
9.33
19
10
11.46
22
9
14.61
12
6
14.69
42
8
12.32
20
5
12.87
12
8
8.78
19
8
10.59
22
6
12.76
12
9
12.72
43
8
11.02
20
10
12.36
11
6
10.98 10.04
19 18
14 16
8.15 6.18 3.39
16 15 16
7 11 11
5. 71
38
50
1!.85
13
11
4.92
38
52
3.90
38
53
7.99 5
14 8
13 ****
7.68 4.88 2.01
12 12 12
6 13 25
7.24 5.08 3.70
19 19 1'1
8 17 32
7.83
21
9
10.43
12
9
8.94
42
11
5.28 2.72
22 22
14 23
6.81
12
21
3.15
11
35
5.35 2.40
42 43
17 29
8.43 5.28 2.24
19 20 20
11 16 30
9.29 6.81
12 12
19 20
4.29
14
20
8.19 5.98 3.46
17 19 19
15 19 32
2.48
16
18
3.22
38
55
1.10
12
28
2.20
18
19
1.73
20
31
1.85
11
44
1.14
38
31
1.18
20
48
3.15
14
22
2.21
12
37
59.85 26.46
4 6
34.25 20.79
52 58
83.00
5
50.79 14.33
15
43.54 !8.92
10 17
53.07 17.99
5 12
66.50 19.88
6 15
63.27 15.15
12
55.32 15.46
6 17
60.38 26.97
16
51.95 21.42
9 ****
Reeord Latest
Annual Bell:an Data
*** Mo/Yr Mo/Yr
86.31 1/61 12/76
4
55.04 7/41 2/79
53
9/64 4/78
65.12 12/58 1/70
62.46 10/30 9/49
12
71.06 5/57 3/79
6
84.90 3/59 10/70
8
78.42 10/18 12/67
8
70.78 1/59 3/79
87.35 12/63 1/79
****
73.37 6/60 4/79
****
* First line of data in the tab1e~for each station is mean evaporation in inches; second line is· the number of years of reeord per month; and third line is the coeffieient
of variation in percent (eompute~ only when there are 10 years or more of reeord durinll: 1956-1970).
•* Climatological Data (NOAA-EDIS)
*** Sum of monthly means.
**** Insufficient data between 1956-70 to compute the coefficient of variation. For several California stations other years were use~, but only annual or Hay-oetober
coeffieients were computed.
<0
CALIFORNIA (continued)
Pine Flat Dsm
36" 50', 119° 19'
Placerville IFG
38° 44'. 120° 44'
Prado Dsm
33° 54', 117° 38'
Pyramid Reservoir
34° 40', 118" 47'
Red Bluff 3 E
40° 09'. 122° 10'
Redinger Lake -Dam
37° 09', 119° 27'
Riverside Citrus Exp
33" 58'. 117" 20'
Rodriguez, Baja Calif
32" 27', 116" 54'
Salinas Dsm
35" 20.. 120" 30'
San Antonio Dam
35" 49', 120" 56'
San Bernardino FC
34" 06', 117" 16'
Station
State Index
TABLE I --MEAN MONTHLY, SEASONAL, AND ANNUAL CLASS A PAN EVAPORATION (INCHES)
FOR STATIONS WITH 10 YEARS OR MORE OF RECORD FOR BEST MONTH*
May-Nov-
Oct Apr
No. No.** Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec *** ***
Other
Season
***
4 6896
4 6962
4 7123
4 7170
4 7291
4 7305
4 7473
4 7528
4 7672
4 7714
4 7725
1.06
29
26
1.42
21
42
1.69
29
19
1.69
27
29
3.43 3.50
38 37
32 30
3.90 3.98
11 10
46 52
1.77
14
25
1.57
13
26
2.36
14
29
2.13
13
20
2.83 3.23
50 52
32 31
3.86 3.78
16 16
35 33
1.81
16
32
1.97
12
21
2.97
14
30
2.56
15
22
2.60
11
13
3.52
14
22
3.27
29
21
2.83
30
20
4.72
37
26
5.35
11
21
3.90
14
17
3.98
13
19
4.57
53
21
4.57
16
19
4.21
15
20
4.25
12
19
4.62
14
21
5.04
29
24
4.21
29
25
6.14
37
16
6.73
12
25
5.71
14
21
6.50
13
13
5.79
52
19
5.83
16
21
5.79
14
22
6.18
11
20
6.24
14
20
7.91
29
16
6.02
30
17
7.68
38
14
8.27
11
35
7.60
14
13
8.98
13
16
7.05
52
13
6.89
15
17
8.15
15
11
8.78
11
10
7.67
14
15
10.16
29
12
7.83
31
14
8,62
39
18
10.35
11
18
9.53
14
8
11.61
13
10
8.19
53
17
7.36
16
15
9.69
15
11
10.94
11
16
8.31
14
21
12.05
29
9
9.72
30
9
10.71
39
13
12.13
12
17
10.39
14
9
14.76
13
7
9.88
51
12
8.54
16
14
11.65
16
7
12.28
11
7
11.40
15
10
10.87
30
9
1!.82
30
11
10.00
39
12
11.85
12
16
8.66
14
7
12.87
13
6
9.25
50
14
8.07
16
9
10.98
16
11
10.98
11
11
10.84
15
15
8.19 5.00 2.05
29 28 28
9 15 24
6.89 4.13
30 30
10 18
2.05
30
36
7.91
38
14
5.67 4,21
38 39
17 32
9.06 6.65 4.61
12 12 12
17 15 30
7.13 4.65 2.28
14 14 14
11 13 33
9.53 6.18 2.91
13 13 13
5 12 17
7.05 5.24
51 51
18 19
3.62
51
23
6.50 5.55 3.90
16 16 16
18 18 25
8.19
16
11
8.23
10
9
7.92
15
18
5.83
16
17
5.31
11
14
2.87
16
18
2.99
11
24
6.08 3.83
15 14
19 27
1.06
28
38
1.57
22
45
3.38
39
30
3.78
12
45
1.61
14
41
1.85
13
26
2.68
51
25
3.11
16
40
1. 77
16
21
1.89
12
33
2.62
14
24
54.18 14.17
8 16
43.41 13.77
14
50.59 25.37
11 16
58.31 28.35
13 24
47.96 17.63
5 11
63.93 18.94
4 9
46.66 22.72
11 16
42.91 25.05
12 18
54.49 19.01
5 11
56.52 19.88
6 ****
52.22 23.80
12 14
Annual
***
68.35
9
57.18
6
75.96
11
86.66
****
65.59
6
82.87
4
69.38
12
67.96
12
73.50
5
76.40
****
76.02
11
Record
Began
Mo/Yr
7/49
6/48
7/30
3/67
1/59
10/46
1/25
1/61
7/63
12/66
6/59
Latest
Dsta
Mo/Yr
6/78
6/78
1/69
12/78
12/72
9/59
4/78
12/76
3/79
3/79
10/73
* First line of data in the table for each station is mean evaporation in inches; second line is the number of years of record per month; and third line is the coefficient
** ***
****
of variation in percent (computed only when there are 10 years or more of record during 1956-1970).
Climatological Dsta (NOAA-EDIS)
Sum of monthly means.
Insufficient data between 1956-70 to compute the coefficient of variation. For several California stations other years were used, but only annual or May-october
coefficients were computed. ·
N
0
CALIFORNIA (continued)
San Fernando
34° 16'. 118° 28'
San Jacinto Res MWD
33° 48', 117° 00'
San Luis Dam
37" 03', 121" 04'
San Mateo Cr, Camp Pendleton
33° 28', 117° 28'
San Pasquel Valley SDDU
33° 05', 117° 00'
Santa Rosa, Sewage Plt.
38° 26', 122° 45'
Shasta Dam
40° 43 •• 122" 25.
Shaver Lake
37° 09', 119° 18'
Silver Lake Res
34° 06', 118° 16'
Sly Park
38° 43', 120° 34'
Soledad CTF
36° 28', 121° 23'
Station
State Index
TABLE I --MEAN MONTHLY, SEASONAL, AND ANNUAL CLASS A PAN EVAPORATION (INCHES)
FOR STATIONS WITH 10 YEARS OR MORE OF ~ECORD FOR BEST MONTH~
May-Nov-
Oct Apr
No. No.** Jan Feb Mar Apr May Jun Jul Au!!t Sep Oct Nov Dec *** ***
Other
Season
***
4 7759
4 7811
4 7846
4 7866
4 7873
4 7964
4 8135
4 8140
4 8252
4 8295
4 8338
5. 75 4.69
24 24
31 40
2. 72
32
28
3.23
32
24
1.58 2.62
16 17
23 23
4.02
22
23
2.91
10
52
3. 74
23
28
2.83
10
29
1.50 2.20
17 16
37 26
1.81 2.14
31 33
33 33
1.14
13
47
1.30
13
32
2.75 3.58
16 15
22 23
0.55 0.94
15 18
60 50
2.40 2.99
10 10
11 21
6.14
24
30
4.80
32
23
5.57
17
23
4.25
23
27
5
9
****
3.70
16
26
3.45
33
19
2.20
13
23
4.72
15
20
1. 77
19
56
4.61
11
9
6.50
24
19
6.38
32
17
8.99
16
27
5.43
21
25
5.47
10
14
5.55
16
23
5.25
33
28
3.58
13
16
5.59
15
23
3.23
19
29
5.98
11
15
7.56
24
16
8.58
32
11
7. 76
24
13
10.31
32
16
13.28 16.07
17 17
14 11
5.91
21
19
7.24
10
7
7.36
16
17
7.51
33
20
5.79
13
17
6. 77
16
14
5.00
19
25
7.68
11
9
6.81
21
21
8
9
****
8.58
16
17
9.21
33
15
7.28
13
10
6.93
16
15
7.32
18
16
8.19
10
9
10.35
24
8
12.56
33
12
19.13
17
8
9.02
22
19
9.84
10
10
9.41
17
9
11.49
33
12
9.17
13
6
9.02
16
9
9.0'1
19
9
8.58
10
9
9.45
24
6
11.50
33
13
8.46 7.40 7.56
24 24 24
11 15 31
9.02
33
15
6.38 3.78
31 31
25 20
17.23 12.21 7.36 2.90
17 17 17 17
10 9 10 22
10.20
22
23
9.33
11
8
8.30
17
8
10.23
33
14
8.31
13
9
8.35
16
7
8.46
19
10
7.60
10
8
8.78 7.60 5.75
22 22 22
23 28 27
7.91
11
11
5.40 4.17
10 10
8 21
6.57 4.37 2.13
17 17 17
10 15 19
7.93
33
12
5.02 2.57
33 32
16 28
6.30 3.66 2.13
13 13 13
12 13 20
6.73 5.04 3.62
16 16 16
11 15 22
6.02
19
12
3.46
19
25
6.57 5.31
10 10
10 13
1.38
19
50
3.11
10
16
6.14
24
21
2.80
32
38
1.57
16
28
4.76
22
31
2.80
10
32
****
1. 75
31
37
1.50
13
27
2.72
16
24
0.79
17
51
2.24
10
18
so. 98 36.78
5 17
58.35 23.71
11 15
85.28 23.23
4 14
48.32 27.95
13 13
48 23
**** ****
44.59 17
6 ****
51.39 16.97
9 13
40.51 11.85
5 13
42.84 22.98
8 13
39.35 8.66
7 21
43.93 21.33
6 ****
Record Latest
Annual Began Data
*** Mo/Yr Mo/Yr
87.76 1/31 12/54
8
82.06 7/39 9/71
12
108.51 2/63 12/79
5
76.27 2/57 3/79
11
71 10/46 9/57
****
62 7/62 1/79
****
68.36 1/46 12/79
9
52.36 10/46 9/59
5
65.82 1/52 12/67
9
48.01 7/55 2/79
8
65.26 3/61 5/71
5
* First line of data in the table for each station is mean evaporation in inches; second line is the number of years of record per month; and third line is the coefficient
of variation in percent (computed only when there are 10 years or aore of record during 1956-1970).
** Cliaatological Data (NOAA-EDIS)
*~~ Sua of aonthly aeans.
**** Insufficient data between 1956-70 to· co~ute the coefficient of variation. For several California stations other years were used, but only annual or May-October
coefficients were co~uted.
1\)
Station
State Index
TABLE I --MEAN MONTHLY, SEASONAL, AND ANNUAL CLASS A PAN EVAPORATION .(INCHES)
FOR STATIONS WITH 10 YEARS OR MORE OF RECORD FOR BEST MONTH*
May-Nov-
Oct Apr
No. No.** Jan Feb Mar Apr Hay Jun Jul Au~t Sep Oct Nov Dec *** ***
Other
Season
***
CALIFORNIA (continued)
Stony Gorge Res
39° 35', 122° 32'
Success Dam
36° 03', 118° 55'
Taft IcrKR Radio
35° 09', 119° 28'
Tahoe City
39° 10'. 120° 08'
Tecate Hydro Res, Baja Calif
32° 32', 116° 39'
Terminus Dam
36° 25', 119° OO'
4
4
4
4
4
4
Tijuana Hydro Res, Baja Calif 4
32 ° 31 ' • 117 ° 02 '
Tracy Pumping Plant
37° 48', 121° 35'
Trinity Dsm Vista Pt
40° 48', 122° 46'
Tujunga Spreading Gr -Evap
34° 13', 118° 25'
Tulelake
41° 58', 121° 28'
4
4
4
4
8587
8620
8755
8758
8817
8868
8928
9001
9024
9048
9053
1.18 1.85
30 30
23 27
1.42
19
26
2.17
19
19
2.05 2.87
18 18
31 20
3.27 3.31
13 13
20 27
1.54
16
30
2.36
16
21
3.43 3.70
15 14
26 18
1.58 2.70
25 25
30 26
3.35
12
27
3. 70
12
33
3. 70
30
18
4.17
19
17
5.47
18
16
4.29
12
26
4.09
16
21
3.94
14
14
5.53
26
19
3
5
****
5.04
12
24
5.67
30
22
6.42
19
21
7.80
18
21
3
5
****
5.20
13
23
5.98
16
26
4.96
13
15
8.51
26
19
4.02
15
33
6.06
11
19
5
7
****
8.43
30
15
9.76
19
11
11.46
19
12
4.06
33
23
6.14
13
16
9.57
16
14
5.83
15
10
12.48
26
11
7.05
16
15
7.68
12
13
8.02
14
11
10.67
30
12
11.97
19
10
13.78
1.9
8
5.00
59
24
7.01
13
14
11.93
16
8
6.10
13
12
15.57
26
10
8.58
16
10
8.03
12
13
8.34
17
12
12.55
30
6
13.82
18
7
15.47
19
5
6.04
59
19
8.62
12
19
14.29
15
5
6.93
14
11
17.57
27
8
10.55
17
5
10.16
12
R
9.45
17
5
11.02
30
9
12.44
20
9
13.86
19
7
5.80
57
17
8.27
10
16
13.23
16
9
7.32
13
10
15.25
27
7
9.13
16
12
9.61
12
6
8.54
17
10
8.27 4.80 1.89
30
23
30 29
7 14
9.33 6.18 2.72
19 18 18
10 16 27
10.35 6.77 3.27
19 18 18
9 12 18
3.87
57
22
6.81
12
11
10.04
16
9
5.83
16
12
2.14
39
40
6.42 3.86
12 13
21 18
6.61
15
13
2.91
15
22
5.08 3.39
15 14
14 35
11.09 6.79 2.98
26 27 27
8 13 20
6.53
17
16
3.07 0.98
17 16
33 69
7.36 5.79 4.53
12 12 12
20 13 25
6.65
18
24
3.62
11
14
1.18
30
29
1.30
18
31
1.81
18
29
3.54
12
17
1.34
15
36
3.03
14
23
1.58
26
34
1
5
****
3.50
13
22
55.74 15.47
6 13
63.50 18.20
11
71.69 23.27
4 8
26.30
19
43.27 23.47
10 11
66.07 18.22
5 14
37.09 22.45
****
78.75 22.88
4 11
44.91
5
48.63 26.18
R 11
44.62
****
Record Latest
Annual Began Ds ta
*** Mo/Yr Mo/Yr
71.21 11/48 9/78
81.70 8/59 6/78
94.96 5/60 9/78
4
4/19 12/79
66.74 1/61 12/73
****
83.89 9/62 8/78
6
59.54 1}61 12/76
****
101.63 7/53 12/79
4
7/62 11/78
74.81 12/32 12/44
8/62 12/79
* First line of data in the table for each station is mean evaporation in inches; second line is the number of years of record per month; and third line is the-coefficient
of variation in percent (computed only when there are 10 years or more of record durin~t 1956-1970).
** Climatological Dsta (NOAA-EDIS)
*** Sum of monthly means.
**** Insufficient data between 1956-70 to compute the coefficient of variation. For several California stations other years were used, but only annual or Hay-Dctober
coefficients were computed.
1\)
1\)
TABLE I --MEAN MONTHLY, SEASONAL, AND ANNUAL CLASS A PAN EVAPORATION (INCHES)
FOR STATIONS WITH 10 YEARS OR MORE OF RECORD FOR BEST MONTH*
Station
State Index
No. No.** Jan Feb
CALIFORNIA (continued)
Turntable Creek
40° 46'. 122° 18'
Twitchell Dam
34" 59'. 120° 19'
U.S. Cotton Field Station
35" 32', 119° 17'
Vail Lake -USGS
33° 30'. 116" 59'
4
4
4
4
Valle de Las Palmas,Baja Calif 4
32° 23', 116° 40'
Van Nuys FC 15B
34° 11'. 118° 27'
Verdugo Pump Station
35° 15', 118", 20'
Villa Park Dam
33° 49', 117° 46'
Vinton
39° 49'. 120° 11'
Westley
37" 33', 121° 12'
Whale Rock Dsm
35° 27'. 120° 53'
4
4
4
4
4
4
9083
9111
9145
9213
9218
9260
9298
9338
9351
9565
2.32 2.76
19 21
32 32
3.21
17
26
3.49
17
22
1.50 2.64
17 17
26 20
3.46 3.94
23 20
27 20
4.02 4.06
14 15
27 31
1.31
19
26
5.59
13
21
1.41
19
29
5.13
13
26
2.83 2.99
15 15
29 31
1.38 2.32
21 21
39 29
960310 4.57 3.70
16 16
27 23
Mar
3.98
22
27
4.52
17
22
5.12
17
14
4.69
23
27
5.12
15
24
2.63
19
26
6.44
13
22
3.35
15
31
4.61
21
23
4.65
16
18
Apr
5.51
22
28
5.35
18
23
7.48
17
20
5.98
24
16
6.50
14
26
3.57
19
19
7.43
12
20
4.76
15
15
8
5
****
6.65
21
24
5.51
16
17
May
6.54
21
17
6.97
18
17
11.18
17
12
7.95
24
11
7.91
14
10
4.36
19
16.
7.28
12
16
5.43
15
12
7.56
9
****
8.98
22
16
6.22
15
9
Jun
8.39
22
18
7.61
18
17
12.20
17
6
9.33
24
13
9.21
15
16
4.60
19
20
8.52
12
17
6.14
15
19
8.39
11
23
10.55
22
12
6.42
15
12
Jul
10.51
22
9
8.86
17
7
12.40
18
10
11.46
23
7
10.63
15
16
5.86
19
19
11.18
13
8
7.76
14
9
10.87
11
17
10.91
22
9
6.57
15
6
Aug
10.04
22
10
8.55
17
8
10.55
19
10
Sep Oct Nov
8.66 5.83 3.27
21 21 20
12 17 31
7.34 5.91
18 18
17 20
3.99
17
21
8.19
19
9
5.35 2.40
19 18
12 26
11.14 8.35 6.38 4.29
24 23 24 24
10 19 17 24
10.31
14
17
5.17
18
24
10.38
13
8
7.36
14
9
10.00
11
16
9.06
21
13
6.18
16
7
8.50 6.46 4.33
15 14 15
15 17 18
3.71
18
22
2.37
18
15
1.73
18
29
9.5q 8.43 6.27
13 13 13
18 23 26
5.82 4.76 3.39
14 14 14
23 17 26
7.60 5
10 8
15 ****
7.40
20
19
5.16 2.44
21 20
14 19
5.87 6.18 4.80
16 16 16
20 31 20
Dec
2.64
18
41
3.29
18
22
1.30
17
32
3.54
22
32
3.70
14
27
1.22
18
20
6.06
13
24
2.60
14
24
1.54
21
57
4.57
16
29
May-Nov-
Oet Apr
*** ***
49.97 20.48
8 17
45.24 23.84
8 11
60.32 20.44
6 8
54.61 25.90
15
53.02 27.73
11 15
25.93 11.81
17 16
55.66 36.70
6 9
37.27 19.92
6 13
50
****
52.06 18.94
9 17
37.44 27.80
8 11
Other
Season
***
Record Latest
Annual Began Data
*** Mo/Yr Mo/Yr
70.45
10
69.08
6
82.59
6
80.51
80.75
****
37.73
14
92.36
5
57.19
71.00
9
65.24
7
1/48 10/69
4/62 12/79
8/44 10/78
4/52 6/76
1/61 12/77
1/30 7/48
1/56 12/69
1/64 6/78
1/60 8/70
10/49 12/71
9/63 4/79
{i First line of--data in the table for each station is mean evaporation in inches; second line is the number of years of record per month; and third line is the coefficient
*'" *'"* ****
of variation in percent (computed only when there are 10 years or more of record during 1q56-1970).
Climatological Dsta (NOAA-EDIS)
Sum of monthly means.
Insufficient data between 1956-70 to compute the eoefficient of variation.-For several California stations other years were used, but only annual or May-october
coefficients were co.puted. -,
TABLE I --MEAN MONTHLY, SEASONAL, AND ANNUAL CLASS A PAN EVAPORATION (INCHES)
FOR STATIONS WITH 10 YEARS OR MORE OF RECORD FOR BEST MONTH*
Station May-Nov-Other Record Latest
State Index Oct Apr Season Annual Began Data
No. No.** Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec *** *** *** *** Mo/Yr Mo/Yr
CALIFORNIA (continued)
Whale Rock Res 4 960325 2.76 2.72 3.66 4.80 6 7 7 7 6 4 3 2.52 37 19 -56 12/69 4/79
35° 29'. 120° 52' 10 10 10 10 9 9 9 9 9 9 9 10
28 18 22 17 **** **** **** **** **** **** **** 25 **** **** ****
Whiskeytown Reservoir 4 9621 1 1.51 2.92 4.61 7.09 8.84 11.08 9.71 7.11 3.79 1.44 1.08 47.68 13 -61 7/59 12/79
40° 37'. 122° 32. 8 18 19 16 19 19 20 20 21 21 19 14
**** 38 16 26 18 9 8 14 13 21 37 38 5 **** ****
Whitaker Forest 4 9629 6.06 7.99 7.80 5.71 3.50 - -31.06 -7/66 10/77
36° 42 •• 118° 56' 10 12 12 12 10
19 6 10 20 43
Willow Creek, 1 NW 4 9694 1 2 3 5 7.14 8.62 6.89 4.51 2 1 34 - -
-6/69 9/79
40° 57', 123° 38' 7 9 9 9 10 11 11 11 9 6
**** **** **** **** 8 5 8 16 **** **** ****
COLORADO
Alamosa WSO AP 5 0130 7.45 9.71 10.58 9.57 8.37 6.68 --52.36 -5/60 9/79
N 37° 77', 105° 52' 12 15 16 17 17 17
VI **** 9 7 6 12 8
Bonny Lake (Bonny Dam) 5 0834 8.18 9.41 11.57 12.44 11.30 8.55 6.68 59.95 -- -
1/49 8/78
39° 38'. 102° 11' 19 28 29 30 30 28 23
16 16 20 15 13 18 17 12
Climax 2NW 5 1660 5.67 4.66 3.80 --14.13 -7/58 9/71
39° 22.. 106° 11' 11 12 10
13 19 ****
Conejos 3 NNW 5 1816 7 8.28 R.57 7.40 7.06 7.15 5.27 43.73 - -
-6/40 9/59
37° 08 •• !06° 02. 7 19 20 20 20 20 15
**** **** **** **** **** **** **** **** .....
Estes Park 5 2759 6 7.13 7.06 5.87 5.14 --31 -5/56 9/71
40° 23. • 105 ° 31. 5 14 15 15 13
**** 16 9 18 15
Grand Junction 6 ESE 5 3489 7.77 10.23 12.83 13.20 11.35 8.38 5.19 2 61.18 - --4/56 9/79
39° 03'. 108° 27' 17 22 23 23 22 23 17 8
16 21 27 24 26 27 27 **** 22
Grand Lake 6 SSW 5 3500 7 8.30 8.33 7.00 5.65 3.67 40 ---8/49 9/79
40° 11•, 105° 52' 9 25 29 30 30 19
**** 14 8 14 15 **** ****
* First line of data in the table for eaeh station is mean evaporation in inches; second line is the number of years of record per month; and third line Tilthe coefficient
of variation in percent (computed only when there are 10 years or more of record during 1956-1970).
** Climatolosical Data (NOAA-EDIS)
*** Sum of monthly means.
**** Insufficient data between 1956-70 to compute the coefficient of variation. For several California stations other years were used, but only annual or May-october
coefficients wexe co.puted.
I\)
~
TABLE I --MEAN MONTHLY, SEASONAL, AND ANNUAL CLASS A PAN EVAPORATION (INCHES)
FOR STATIONS WITH 10 YEARS OR MORE OF RECORD FOR BEST MONTH*
Station May-Nov-Other Record Latest
State Index Oct Apr Season Annual Began Dsta
No. No.** Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec *** *** *** *** Mo/Yr Mo/Yr
COLORADO (continued)
Green Mountain Dsm 5 3592 5.27 6.84 7.10 6.08 4.82 3.18 33.29 ---8/48 9/78
39° 53.' 106° 20' 12 29 30 31 31 16
**** 19 9 13 15 17 ****
John Martin Dam 5 4388 6 8.16 9.85 11.61 12.58 10.72 8.28 5.70 58.74 ---4/42 9/78
38° 04', 102° 55' 7 33 37 36 36 36 37 35
**** 13 13 14 11 9 13 17
Lake George 8 SW 5 4742 7 8.03 7.48 6.25 5.81 --35 -4/67 10/79
38° 55', 105° 29' 5 13 13 13 13
**** **** **** **** **** ****
Meridith 5 5507 8.96 8.85 7.26 5.41 --30.48 -5/69 9/79
39° 22', 106° 45' 11 11 12 12
**** **** **** ****
Montrose No. 1 5 5717 1.28 1.56 3.54 5.59 7.58 9.35 9.21 7.58 5.80 3.57 1.68 1.29 43.09 14.94 -58.03 1/41 10/79
38° 29'' 107° 53' 30 30 33 39 38 39 39 39 39 39 35 15
8 10 18 15 13 13 11 14 14 22 22 13 9 9 8
Pueblo City Reservoir 5 6743 3.62 5.76 6.96 9.00 10.51 11.06 9.41 7.68 5.43 3.38 3 53.09 -- -
3/42 10/70
38° 17', 104° 39' 11 14 20 28 29 29 29 29 26 15 7
**** **** **** 12 17 11 14 18 16 **** **** 11
Springfield 5 7866 8.44 10.60 12.26 13.16 11.88 9.16 6.86 63.92 ---9/56 10/79
37" 23', 102° 42' 23 23 23 23 23 24 24
17 14 12 12 13 16 21 10
Sugar Loaf Reservoir 5 8064 6.50 5.85 5.02 4.12 3 --24 -8/48 9/79
39° 15', 106° 22' 19 27 27 26 8
**** 12 13 11 ****
Twin Lakes Reservoir 5 8501 8 8.02 6.89 5.45 --28 -7/65 10/78
39° 05', 106° 19' 7 10 10 10
**** **** **** **** ****
Vallecito Dam 5 8582 4.00 5.47 6.73 6.62 5.68 4.53 3.18 2 32.21 - -
-8/48 10/79
37° 24', 107° 33' 26 31 31 31 32 32 31 8
13 13 12 11 16 24 26 **** 11
.Wagon Wheel Gap 5 8742 7 8.57 7.27 6.04 5.59 4 38 ---5/40 9/71
37° 48', 106° 58' 5 30 31 31 32 9
**** 17 1R 15 15 **** ****
* First line of data in the table for each station is mean evaporation in inches; second line is the number of years of record per month; and third line is the coefficient
of variation in percent (computed only where there are 10 years or more of record during 1956-1970).
** Climatological Dsta (NOAA-EDIS)
*** Sum of monthly means.
**** Insufficient data between 1956-70 to compute the coefficient of variation.
N
01
TABLE I --MEAN MONTHLY, SEASONAL, AND ANNUAL CLASS A PAN EVAPORATION (INCHES)
FOR STATIONS WITH 10 YEARS OR MORE OF RECORD FOR BEST MONTH*
Station May-Nov-Other Record Latest
State Index Oct Apr Season Annual Began Data
No. No.•• Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dac *** *** *** .... Mo/Yr Mo/Yr
COLORADO (continued)
Wiggins 7 SW 5 9025 10 S.81 9 10 s 6.02 4 46 ---4/61 9/70
40" 09.. 104° 11' 9 10 s 9 9 10 9 •••• **** • ••• • ••• **** •••• •••• ****
CONNECTICUT
Coventry 6 16S9 6 5.S5 6.06 5.06 3.77 --27 -5/57 7/79
41° 4S', 72° 21' 6 19 23 22 21
**** 10 15 12 12
Norfolk . 6 5445 3.70 4.30 4.52 3.87 2.3S 1.28 20.50 ---5/65 10/79
41° 58'. 73° 13' 14 14 15 15 15 13
**** **** **** **** **** **** ****
DELAWARE
Georgetown 7 3570 5.76 6.55 7.33 7.69 6.75 5.13 3.'10 37.35 ---4/56 10/79
3S 0 3S', 75° 27' 16 20 21 23 22 24 20
**** 10 10 10 11 20 16 13
Newark University Farm 7 6410 5.17 6.00 6.39 5.59 4.00 --27.15 -5/2S 9/79
39° 40', 75° 44' 12 1S 16 15 15
**** **** **** **** ****
FLORIDA
Bey Lake s 0520 3.19 3.91 5.65 6.76 7.S4 7.39 6.77 6.14 5.42 4.90 3.77 3.05 3S.46 26.33 -64.79 12/51 12/66
2S 0 04', S2" 30' 15 15 14 15 15 15 13 15 15 15 15 16
15 13 20 13 14 s **** 14 9 14 14 10 **** 13 ****
Belle Glade Exp Station s 0611 3.35 3.99 5.70 6.45 7.07 6.29 6.33 6.15 5.30 4.73 3.66 3.14 35.S7 26.29 -62.16 3/40 12/79
26" 40', so• 3S' 3S 3S 40 40 40 40 40 40 40 40 40 40
9 7 9 s s 6 7 7 7 9 10 s 4 5 4
Flamingo R S s 3020 5 5 7 9 9 s S.15 7.43 6 6 4 4.3S 45 34 -79 5/63 9/75
2s• 09', so• 55' 7 s s s 9 6 10 10 s 9 9 10
**** **** **** **** **** **** **** **** **** **** **** **** **** **** ****
Ft. Lauderdale Exp Sta s 3171 3.S3 4.33 6.24 7.54 7.S3 6.92 7.15 6.97 5.94 5.52 4.31 3.S1 40.33 30.06 -70.39 11/53 6/79
26" o5', so• 15' 25 25 ·25 25 25 25 21 20 22 23 24 24
13 8 9 6 13 11 10 7 12 9 7 8 6 4 4
• First line of data in the table for each station is mean evaporation in inches; second line is the number of years of record per month; and third line is the coefficient
** .....
••••
of variation in percent (computed only Where there are 10 years or more of record during
Climatological Data (NOAA-EDIS)
Sum of monthly aeans •
Insufficient data between 1956-70 to co~ute the coefficient of variation •
1956-1970). .
1\)
m
FLORIDA (continued)
Gainesville 2 WSW
29• 3S', sz• 22'
Hialeah
25• 50', so• 17'
Lake Alfred
zs• 06', s1• 43'
Lake City 2E
3o• 11', sz• 36'
Lisbon
zs• 52', s1• 47'
Loxahatchee
26• 41', so• 16'
Milton Exp. Sta
30° 47', S7° OS'
Moore Haven Lock No. 1
26 ° 50' • S1 ° 05'
Tamiami Trail (40 Mi Bend)
25• 45', so• 50'
Vero Beach 4W
27• 3S', so• 27'
Woodruff Dam
3o• 43', s4• 52'
Station
State Index
TABLE I --MEAN MONTHLY, SEASONAL, AND ANNUAL CLASS A PAN EVAPORATION (INCHES)
FOR STATIONS WITH 10 YEARS OR MORE OF RECORD FOR BEST MONTH*
May-Nov-
Oct Apr
No. No.** Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dac *** ***
Other
Season
***
s 3321
s 3909
s 4707
s 4731
s 5076
s 51S2
s 5793
s 5S95
s S7SO
s 9219
s 9795
2.95
23
12
3.S1
3S
10
3.33
14
3.71
26
10
4.42
37
9
3.91
14
5.65
26
10
6.12
37
7
6.01
14
7.14
26
9
7.26
36
5
7.37
14
7.97
26
10
7.80
39
7
S.16
15
7.59
25
9
7.12
3S
11
7.23
15
7.14
25
5
7.36
3S
6
7.33
14
6.71
26
s
7.22
3S
7
6.92
15
5.74
26
s
5.91
37
14
6.17
15
4.97
27
13
5.S1
38
6
5.30
14
3.60
27
11
4.79
39
s
3.90
14
2.82
26
13
3.SO
3S
11
3.09
14
**** **** **** **** **** **** **** **** **** **** **** ****
2.99 3. 76
10 11
5.70
14
7.06
14
7.70
14
7.55
13
7.49
15
6.59
13
5.92
14
4.94
15
3.56
15
2.98
13
**** **** **** **** **** **** **** **** **** **** **** ****
2. 75
19
9
3.17
19
3.30
20
6
3.S1
19
5.01
20
8
5.2S
19
6.59
20
7
6.27
19
7.15
19
s
6.94
19
6.61
20
9
6.17
19
6.55
20
6
6.01
19
6.02
20
6
5.91
19
5.09
20
7
5.16
19
4.44
20
5
4.55
19
3.21
20
11
3.40
19
2.69
20
15
2.S1
19
**** **** **** **** **** **** **** **** **** **** **** ****
2.5S
12
3.26
16
4.99
16
6.25
16
7.02
16
7.os
17
6.56
16
6.05
16
5.27
16
4.70
17
3.1S
16
2.32
15
**** **** **** **** **** **** **** **** **** **** **** ****
4.05
31
11
3.36
29
s
2.SO
14
23
2.63
18
14
4.30
31
9
3.S5
30
9
3.60
14
1S
3.27
17
10
6.47
31
10
5.41
30
9
5.44
14
15
5.20
19
9
7.87
31
9
6.31
29
7
6.64
14
11
6.51
19
s
S.50
31
11
6.S3
31
12
7.07
15
11
7.27
1S
11
7.68
30
9
6.15
27
13
6.66
15
11
7.S4
1S
11
7.50
31
s
6.S7
27
9
6.64
15
9
7.33
1R
5
7.17
31
11
6.57
32
s
6.32
15
12
6.96
19
7
6.56
31
10
5.36
31
14
5.03
15
16
6.52
19
s
5.91
31
12
5.53
31
s
4.S1
15
22
5.42
19
14
4.46
31
7
3.S1
32
9
3.31
15
21
3.44
19
s
3.60
30
11
3.20
29
10
2.64
15
27
2.5S
19
11
40.12 25.S7
3
41.22 30.20
5 4
41.11 27.61
**** ****
40.19 26.05
**** ****
35.S6 23.55
4
34.74 24.74
**** ****
36.6S 22.5S
**** ****
43.32 30.75
6
37.31 25.94
5
36.53 24.43
11 16
41.34 23.63
5 5
Record
Annual Began
*** Mo/Yr
65.99 10/53
4
71.42 1/41
3
6S.72 5/65
****
66.24 6/65
****
59.41 1/60
59.4S 1/41
****
59.26 1/63
****
74.07 1/49
6
63.25 2/41
5
60.96 5/65
12
64.97 1/59
5
Latest
Data
Mo/Yr
12/79
12/79
12/79
12/79
12/79
12/59
12/79
12/79
11/79
12/79
12/7S
* First line of data in the table for each station is mean evaporation in inches; second line is the number of years of record per month; and third line is the coefficient
of variation in percent (computed only where there are 10 years or more of record during 1956-1970).
** Climatological Data (NOAA-EDIS)
*** Sum of monthly means.
**** Insufficient data between 1956-70 to compute the coefficient of variation.
1\)
......
GEORGIA
Aily
32" 11', 82" 34'
Allatoona Dam
34° 10', 84° 44'
Athens College of Agric
(Athens)
33° 55', 83° 21'
Calhoun Exp Station
34° 29', 84" 58'
Experiment
33° 16', 84° 17'
Rome WSO AP (Rome)
34" 21', as• 10'
Savannah WSO AP
32" 08', 81° 12'
Tifton Exp Sta (Tifton)
31" 29', 83" 32'
HAWAII
Hilo WB Airport
19" 43', 155° 04'
Hoaeae
21" 23'. 158° 01'
Station
State Index
TABLE I --MEAN MONTHLY, SEASONAL, AND ANNUAL CLASS A PAN EVAPORATION (INCHES)
FOR STATIONS WITH 10 YEARS OR MORE OF RECORD FOR BEST MONTH*
May-Nov-
Oct Apr
No. No.** Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec *** ***
Other
Season
***
9 0090
9 0181
9 0432
9 1474
9 3271
9 7610
9 7847
9 8703
49 1492
49 1527
2.09 3.06
17 19
4.53
18
5.46
20
6.61
17
6.61
20
6.64
20
6.21
18
4.61
18
3.74
20
2.64
19
2.07
15
**** **** **** **** **** **** **** **** **** **** **** ****
2.76
14
14
3
7
****
3.20
15
18
3.87
12
****
4.82
17
14
5.06
25
14
6.12
16
10
4.63 5.75
8 9
5.77
27
11
7.13
17
11
6.04
9
6.27
27
12
7.49
18
12
7.24
9
6.55
27
14
7.63
16
9
7.25
9
5.97
27
14
6.83
17
ll
6.54
9
4.71
27
13
5.65
17
!7
3.46
26
13
4.21
18
14
5.23 4.22
10 10
2.32
16
****
3.03
17
14
3
9
2.53
18
18
3
8
34.42 19.85
**** ****
32.73
6
38.94 22.46
6 5
36.52
**** **** **** **** **** **** **** **** **** **** ****
2.57
30
****
1.77
11
****
3.10
32
16
2.76
16
****
3 3.67
9 11
4.78
35
14
3.85
15
****
6.26
43
11
5.29
18
12
7.53
43
13
6.37
17
11
7.96
41
14
6.69
16
****
5.69 7.42 7.76 7.91
13 12 13 14
7.58
43
11
6.85
18
16
8.29
13
6.95
42
10
6.02
18
14
7.21
14
5.61
43
12
5.05
19
13
4.32
44
12
3. 76
17
16
3,04
41
9
2.32
18
20
5.75 5.12 3,42
13 13 13
2.36
35
12
1.54
12
****
3
9
**** **** **** **** **** **** **** **** **** **** **** ****
2.22
36.
18
5.01
13
19
3.56
18
2.78
40
12
4.92
13
17
3.85
18
4.53
40
12
5.24
13
17
4.73
18
6.00
39
10
5.61
13
14
5.44
18
7.08
42
14
5.96
13
14
5.99
18
6.97
42
10
6.52
!3
13
6.37
18
6.81
41
10
6.59
!3
10
7.00
19
6.32
42
7
6.20
14
9
7.00
20
5.13
42
11
s. 73
13
14
5.88
20
4.24
41
18
s.so
13
18
5.28
20
2,80
42
13
4.22
13
16
3,88
20
2.17
40
12
4.38
12
22
3.57
19
**** **** ****· **** **** **** **** **** **** **** **** ****
39.95 22.11
5
34.74 17.53
**** ****
42.04 26·
**** ****
36.55 20.50
36.50 29.38
6 ****
37.52 25.03
**** ****
Record
Annual Began
*** Mo/Yr
54,27 1/49
****
5/52
61.40 6/53
3
9/70
62.06 10/36
5
52.27 1/49
****
68 6/65
****
57,05 5/37
7
65.88 8/55
5
62.55 8/19
****
Latest
Data
Mo/Yr
11/79
11/78
6/71
12/79
11/79
3/68
11/79
12/79
10/68
11/38
* First line of data in the table for each station is mean evaporation in inches; second line
of variation in percent (computed only where there are 10 years or more of record during
Climatological Data (NOAA-EDIS)
is the number of years of record per month; and third line is the coefficient
1956-1970).
**
***
****
Sum of monthly means.
Insufficient data between 1956-70 to compute the coefficient of variation.
1\)
(X)
HAWAII (continued)
Honolulu Obs.
21° 19', 158° 00'
Lihue WSO AP
21° 59'. 159° 21.
Maunawili Ranch
21° 23', 157° 48'
Pahala
19° 12', 155° 29'
IDAHO
Aberdeen Exp Sta
42° 57', 112° 50'
Lifton Pump Station
42° 07', 111° 18'
Mackay 4 1111
43° 57', 113° 40'
Milner Dam
42° 32 •• 114 ° 01'
Minidoka Dam (Ruppert)
42° 40'. 113° 29'
Moscow U of I (Moscow)
46° 44', 116° 58'
Palisades Dam (Palisades)
43° 21', 111° 13'
Station
State Index
TABLE I --MEAN MONTHLY, SEASONAL, AND ANNUAL CLASS A PAN EVAPORATION (INCHES)
FOR STATIONS WITH 10 YEARS OR MORE OF RECORD FOR BEST MONTH*
May-Nov-
Oct Apr
No. No.** Jan Feb Mar Apr May Jun Jul Au!( Sep Oct Nov Dac *** ***
Other
Season
***
49 1918
49 5580
49 none
49 7421
10 0010
10 5275
10 5466
10 none
10 5980
10 6152
10 6764
4.73
23
15
5.47
24
5.14
22
11
5.64
23
6.80
23
14
7.30
24
7.50
23
11
7.92
22
8.57
23
9
8.97
23
9.03
22
8
9.61
24
9.66
23
7
10.25
23
9.84
23
9
10.04
24
8.60
23
9
9.15
25
7.54
23
9
7.96
25
5.82
22
15
6.30
25
4.97
22
13
5.53
24
**** **** **** **** **** **** **** **** **** **** **** ****
3.10 3.13
10 11
3.91
11
3.75
11
4.11
11
4.08
11
4.37
11
4.36
11
3.87 3.57 3.15 2.99
11 10 10 10
**** **** **** **** **** **** **** **** **** **** **** ****
4.59
15
4.54
15
5.01
15
5.41
15
5.59
15
5.90
14
6.43
14
6.33
14
5.49
14
5.04
14
4.52
14
4.60
16
**** **** **** **** **** **** **** **** **** **** **** ****
5.19
15
****
4.19
24
****
4.85
19
7.56
43
16
6.35
40
12
6.82
19
8.48
43
14
7 .• 52
45
13
8.88
12
9.88
42
6
9.02
45
6
10.65
14
8.84
43
13
7.96
45
8
9.11
14
6.03 3.61
44 30
13 12
5.54 3.15
44 33
12 ****
6.92
10
**** **** **** ****
8.11
19
9.47
19
8.59
18
5.72 3.05
18 18
2
6
**** **** **** **** **** **** **** ****
7
8
8.17 10.82 13.02 11.48 8.30 4.79
14 13 13 13 13 13
3
6
**** **** **** **** **** **** **** ****
4.39
26
21
5.42
34
21
5.81
21
24
6.18
41
11
7.20
25
23
8.46
41
7
9.45
26
16
7.60
41
17
8.45
26
16
4.50
40
17
3.20
12
****
5.54 4
26 6
22 ****
53.24 34.96
6 9
55.98 38.16
**** ****
24.36 20.03
**** ****
34.78 28.67
**** ****
44.40
39.54
****
35.56
41.76
****
56.58
****
35.36
****
40
****
Record
Annual Began
*** Mo/Yr
88.20
6
94.14
****
44.39
****
63.45
****
1/56
8/55
2/20
12/30
5/35
5/35
7/67
4/27
5/49
6/39
5/49
Latest
Data
Mo/Yr
12/78
12/79
9/30
5/45
12/79
12/79
8/79
7/45
5/62
12/79
9/15
* First line of data in the table for each station is mean evaporation in inches; second line is the number of years of record per month; and third line is the coefficient
of variation in percent (computed only where there are 10 years or more of record during 1956-1970).
** Climatological Data (NOAA-EDIS)
*** Sum of monthly means.
**** Insufficient data between 1956-70 to compute the coefficient of variation.
TABLE I --MEAN MONTHLY, SEASONAL, AND ANNUAL CLASS A PAN EVAPORATION (INCHES)
FOR STATIONS WITH 10 YEARS OR MORE OF RECORD FOR BEST MONTH*
Station May-Nov-Other Record Latest
State Index Oct Apr Season Annual Began Data
No. No.** Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dac *** *** *** *** Mo/Yr Mo/Yr
~(continued)
Twin Falls WSO 10 9303 7 8.62 9.13 10.36 9.11 6.68 4.49 48.39 ---5/63 10/79
42° 33'. 114° 21' 9 17 17 17 17 17 13
**** **** **** **** **** **** **** ****
ILLINOIS
Carlyle Reservoir 11 1290 5.57 6.95 8.50 8.80 7.24 5.69 4.37 41.55 ---4/63 10/79
38° 38', 89° 20' 17 17 17 17 17 16 15
**** **** **** **** **** **** **** ****
Hennepin Power Plant 11 4013 5 6.98 8.32 8.28 6.56 6.21 4 41 -- -
5/63 9/79
41° 18', 89° 19' 7 15 17 15 15 13 8
**** **** **** **** **** **** **** ****
Springfield WSO AP 11 8179 s.so 7.12 8.41 8.95 7.42 6.21 4.55 2 42.67 ---5/41 10/79
39" so•, 89" 40' 28 34 35 35 35 35 35 7
16 16 17 17 15 17 16 **** 9
1\) Urbana 11 8740 4.62 6.33 7.60 7.80 6.29 4.85 3.43 36.30 ---4/63 10/79
<D 40° 06'. 88° 14' 11 16 16 15 15 15 16
**** **** **** **** **** **** **** ****
Urbana Engineering Campus 11 8750 3.90 5.67 6.25 6.52 5.92 4.59 3.23 32.18 ---4/48 10/62
40° 07', 88° 14' 13 14 13 15 15 15 14
16 14 18 19 14 11 20 12
INDIANA
Culver Exp Farm 12 1952 6.61 7.67 7.38 6.25 4.80 3.23 35.94 ---6/61 11/74
41° 10', 86° 28' 12 13 13 12 12 11
**** **** **** **** **** **** ****
Dubois S Ind Forage Farm 12 2309 5.62 6.29 7.02 7.15 6.35 4.89 3.85 2 35.55 ---9/56 10/79
38" 27', 86° 42' 19 23 23 23 22 22 22 7
16 12 9 9 10 13 17 **** 6
Evansville WSO AP 12 2738 5.14 6.66 7.86 8.05 7.07 5.40 3.88 2.52 38.92 ---4/49 10/79
38° 03', 87" 32' 29 31 31 31 31 31 30 12
15 11 13 9 12 20 18 **** 8
Rendall ville 12 4492 4.25 5.65 6.45 6.80 6.10 4.38 2.96 32.34 ---1/49 4/72
41" 27', 85° 15' 20 21 21 22 23 23 22
17 11 11 9 11 18 18 6
* First line of data in the table for each station is mean evaporation in inches; second line is the number of years of record per month; and third line is the coefficient
of variation in percent (computed only where there are 10 years or more of record during 1956-1970).
** ClimatoloKical Data (NOAA-EDIS)
*** Sum of monthly means.
**** Insufficient data between 1956-70 to compute the coefficient of variation.
VI
0
TABLE I --MEAN MONTHLY, SEASONAL, AND ANNUAL CLASS A PAN EVAPORATION (INCHES)
FOR STATIONS WITH 10 YEARS OR MORE OF RECORD FOR BEST MONTH*
Station May-Nov-Other Record Latest
State Index Oct Apr Season Annual Began Data
No. No.** Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dac *** *** *** *** Mo/Yr Mo/Yr
INDIANA (continued)
Milan Waterworks (Milan) 12 5656 4 5.42 6 6.07 5.60 4.17 3.16 30 - -
-5/55 5/68
39• 07', as• oa• 9 12 9 12 13 13 11
**** 16 **** 14 9 19 20 ****
Oaklandon Geist Reservoir
(Indianapolis) 12 6506 3.76 4.96 5.71 6.15 5.31 4.01 2.62 1.66 28.76 - --6/37 10/79
39• s4', as• 59' 40 42 43 43 42 42 43 16
19 12 10 13 8 18 15 ****
Valparaiso Waterworks 12 8999 3.66 5.38 6.14 5.94 4.92 3.23 2.'15 28.56 - - -
4/60 9/79
41° 31', 87° 02' 10 20 20 19 20 20 19
14 14 10 9 11 23 29 9
W. Lafayette 6 1111 12 9430 4.88 6.30 7.28 7.33 6.02 4.84 3.54 2 35.31 - --9/56 10/79
40° 25', 86° 56' 17 20 23 22 23 23 23 5
**** 16 10 9 9 15 19 ****
IOWA
Ames 8 WSW 13 0200 6 7.39 8.65 8.59 7.12 5.43 4.32 41.50 - --4/65 10/79
42° 02', 93° 48' 8 15 15 15 15 15 13
**** **** **** **** **** **** **** ****
Ames 3 SW (Ames) 13 0205 4.84 6.82 7.76 1!.47 7.13 5.26 3.71 2 39.15 - -
-4/33 10/70
42° 00', 93° 39' 35 38 38 38 38 38 38 6
20 15 15 14 8 13 25 **** 10
Burlington Radio KBUR 13 1060 5.25 7.00 8.30 9.04 7.25 5.46 4.13 41.18 - --4/65 10/79
40° 49', 91° 10' 14 15 15 15 15 15 15
**** **** **** **** **** **** **** ****
Castana Exp Farm (Castana 4E) 13 1277 5.65 7.10 8.12 1!.34 7.23 5.40 4.23 40.42 ---5/56 9/79
42° 04', 95° 49' 13 18 18 18 18 18 16
20 21 25 22 21 30 33 20
Cherokee 13 1442 4.19 6.01 6.92 7.86 6.66 5.03 3.45 35.93 ---8/37 11/53
42° 45', 95° 32' 15 15 15 15 16 16 16
**** **** **** **** **** **** **** ****
Dubuque WSO AP 13 2367 5.29 7.00 8.17 8.54 7.57 5.14 3.87 40.29 ---4/63 10/79
42° 24', 90° 42' 14 16 17 16 16 17 16
**** **** **** **** **** **** **** ****
* First line of data in the table for each station is mean evaporation in inches; second line is the number of years of record per month; and third line is the coefficient
**
***
****
of variation in percent (computed only where there are 10 years or more of record during 1956-1970). ·
Climstological Data (NOAA-EDIS)
Sum of monthly means.
Insufficient data between 1956-70 to compute the coefficient of variation.
~
IOWA (continued)
Norwich Exp Farm (Norwich)
40° 45', 95° 12'
Shenandoah 1 NE
40° 47', 95° 21'
KANSAS
Cedar Bluff Dam'
38° 48', 99° 43'
Colby 1 SW
39° 23', 101° 04'
Council Grove Dam
38° 41', 96° 31'
Elk City Daa
37° 17', 95" 48'
Fall River Dam
37° 39', 96° OS'
Garden City Exp Sta
37° 59'. 100° 49'
Glen Elder Dam
39° 30', 98° 19'
Heys 1 S
38° 52'. 99° 20'
John Redmond Dam
38° 15', 95° 45'
Station
State Index
TABLE I --MEAN MONTHLY, SEASONAL, AND ANNUAL CLASS A PAN EVAPORATION (INCHES)
FOR STATIONS WITH 10 YEARS OR MORE OF RECORD FOR BEST MONTH*
No. No.** Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dac
May-
Oct
***
Nov-
Apr
***
Other
Season
***
13
13
14
14
14
14
14
14
14
14
14
6119
7613
1383
1699
1867
2430
2686
2980
3100
3527
4104
4
5
****
4.59
10
6.09
18
7.21
22
8.45
21
9.18
22
7.63
22
6.15 4.60
21 20
**** **** **** **** **** **** ****
8.23
24
14
7.94
14
7
9
8.79 8.68 8.07
10 10 10
5.96 4.23
10 10
**** **** **** **** **** ****
9.60
29
18
9.42
14
12.29
29
19
12.11
14
13.31
29
15
13.41
14
11.89
30
14
11.71
14
9.09
30
22
9.26
14
6.47
23
26
**** **** **** **** **** ****
6.86
12
8.18
14
9.24
15
10.68
15
9.48
15
6.62
15
5.26
14
3
5
**** **** **** **** **** **** **** ****
6.26
16
6.90
16
8.13
16
9.22
16
8.30
16
5.61
16
4.43
16
2.44
12
**** **** **** **** **** **** **** **** ****
5.58
22
31
7.49
30
18
9.50
17
8.31
30
20
11.48
17
9.22
29
11
13.65
17
10.61
30
17
14.66
17
10.09
31
21
11.88
16
7.47
31
27
8.86
17
5.59
30
21
7.32
14
**** **** **** **** **** **** ****
6.68
11
5.35
15
10.55
15
11.97
15
10.75
15
7.39
15
5.36
13
**** **** **** **** **** **** ****
8.17
41
16
6.88
17
11
9.88
42
21
7.68
18
23
12.90
41
21
8.62
18
8
14.52
42
17
10.13
18
12
13.05
42
18
8.86
18
24
10.04 7 .so
42 21
26 ****
5.98
19
12
4.71
18
28
3.46
23
25
3
9
****
2
9
****
43.22
****
43
****
62.65
13
63.85
49.46
****
42.59
****
51.29
14
67.85
****
51.37
****
67.89
****
45.98
13
Annual
***
Record
Began
Mo/Yr
4/38
5/66
8/49
4/66
6/64
4/64
8/48
4/63
5/65
5/38
9/60
Latest
Data
Mo/Yr
10/66
10/79
9/78
9/79
9/78
10/79
9/78
10/79
10/79
9/79
9/78
* First line of data in the table for each station is mean evaporation in inches; second line
of variation in percent (computed only where there are 10 years or more of record during
Climatological Data (NOAA-EDIS)
is the number of years of record per month; and third line is the coefficient
1956-1970).
**
***
****
Sum of monthly means.
Insufficient data between 1956-70 to compute the coefficient of variation.
~
1\)
TABLE I --MEAN MONTHLY, SEASONAL, AND ANNUAL CLASS A PAN EVAPORATION (INCHES)
FOR STATIONS WITH 10 YEARS OR MORE OF RECORD FOR BEST MONTH*
Station May-Nov-Other Record Latest
State Index Oct Apr Season Annual Began Data
No. No.** Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dac *** *** *** *** Mo/Yr Mo/Yr
KANSAS (continued)
Kanapolis Dam 14 4178 7.08 8.25 10.13 11.49 10.50 7.72 5.78 5 53.87 ---5/49 9/78
38° 36', 97° 37' 27 30 30 30 30 30 27 5
13 20 15 17 19 32 24 **** 16
Lovewell Dam 14 4857 6.49 7.51 8.83 10.05 '1.25 6.13 4.44 46.21 - - -
7/58 10/79
39° 54', 98° 02' 20 21 21 22 22 21 20
14 16 11 11 15 19 21 9
Manhattan Agronomy Farm 14 4977 6.19 7.38 8.98 10.31 9.27 7.31 4.77 48.02 ---5/25 9/29
39° 12', 96° 35' 23 30 30 30 30 30 25 4/38 10/62
**** **** **** **** **** **** **** ****
Marion Dam 14 5039 6.73 7.87 9.49 ll.27 9.97 6.84 5.39 3 50.83 - - -
5/66 10/79
38° 23', 97° 05' 13 14 14 14 14 14 14 7
**** **** **** **** **** **** **** **** ****
Milford Lake (or Dam) 14 5306 6.74 8.00 9.68 ll.ll 10.00 6.89 5.41 51.09 ---7/65 9/78
39° 05', 96° 53' ll 12 11 12 11 12 ll
**** **** **** **** **** **** **** ****
Norton Dam 14 5852 7.49 9.02 11.05 12.42 10.78 7.66 5.71 56.64 ---4/63 10/79
39° 49', 99° 56' 16 16 17 17 .17 16 15
**** **** **** **** **** **** **** ****
Perry Lake (or Dam) 14 6333 6.80 7.35 8.88 10.23 9.40 6.35 5 47 ---4/69 9/78
39° 07', 95° 25' 10 10 10 10 10 10 " **** **** **** **** **** **** **** ****
Pomona Dam 14 6498 7.13 7.87 8.88 9.92 8.82 6.37 5.85 47.11 ---9/63 9/78
38• 39', 95• 34' 12 15 15 15 14 16 14
**** **** **** **** **** **** **** ****
Sabetha Lake 14 7073 5.44 6.82 7.48 8.25 7.67 5.32 4.ll 2 39.65 - - -4/56 10/79
39° 54', 95° 54' 22 24 24 24 24 24 24 6
12 14 10 12 11 23 26 **** 10
Toronto Dam 14 8191 4.72 6.44 7.48 7.96 9.58 8.66 5.76 4.52 2.49 43.96 - - -
4/56 9/78
37° 45', 95° 56' 14 23 23 23 23 23 22 22 17
**** 11! 21 I! 11! 19. 28 23 23 12
Tribune 1 W (Tribune) 14 8235 7.79 9.86 12.17 13.90 12.01 8.96 6.14 62.67 - --9/16 9/78
38° 28'. 101° 46' 62 62 61 62 62 63 10
21 19 20 13 13 20 **** ****
* First line of data in the table for each station is mean evaporation in inches; second line
of variation in percent (computed only where there are 10 years or more of record during
** Climatological Data (NOAA-EDIS)
is the number of years of record per month; and third line is the coefficient
1956-1970).
*** Sum of monthly means.
**** Insufficient data between 1956-70 to compute the coefficient of variation.
~
~
TABLE I--MEAN MONTHLY, SEASONAL, AND ANNUAL CLASS A PAN EVAPORATION (INCHES)
FOR STATIONS WITH 10 YEARS OR MORE OF RECORD FOR BEST MONTH*
Station May-Nov-Other Record La teat
State Index Oct Apr Season Annual Began Data
No. No.** Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dac *** *** *** *** Mo/Yr Mo/Yr
~ (continued)
Tuttle Creek Lake (or Dam) 14 8259 6.29 7.15 8.61 9.98 8.82 5.89 4.82 45.87 ---9/59 9/78
39° 15', 96° 36' 15 16 19 18 18 19 16
**** **** 11 13 5 15 **** ****
Webster Dam 14 8648 6.80 8.29 10.09 11.54 10.17 7.18 5.57 52.84 ---4/58 9/78
39° 25', 99° 25' 15 21 21 21 21 21 20
**** 14 15 20 9 17 16 9
Wichita 14 None 6.19 6.99 8.90 10 10 7.75 5.42 49 - -
-9/18 6/27
37° 40', 97° 18' 10 10 10 9 9 10 10
**** **** **** **** **** **** **** ****
Wilson Lake (or Dam) 14 8946 6.87 8.54 10.24 11.98 10.77 7.53 5.97 55.03 ---3/64 9/78
38° 58', 98° 29' 11 14 13 14 14 15 13
**** **** **** **** **** **** **** ****
KENTUCKY
Buckhorn Lake (Buckhorn) 15 1080 4.62 5.02 5.47 5.63 5.07 3.89 2.91 27.99 - --4/61 10/79
37° 21', 83° 23' 17 18 18 16 18 17 17
**** **** **** **** **** **** **** ****
Dawey Dam 15 2180 4.51 4.94 5.35 4.67 3.50 2.24 25.21 - --9/53 10/70
37° 45', 82" 47' 15 16 17 16 17 15
13 12 11 17 24 24 11
Dix Dam 15 2214 5.33 6.14 6.47 6.93 6.34 5.01 3.62 34.51 ---4/54 9/79
37" 48', 84" 43' 23 25 26 26 26 24 20
15 9 10 8 10 10 13 5
Esdsville (Lock 21) 15 None 3 4 4.98 5.86 5.99 4.90 3.64 2.51 1.59 27.88 - --5/37 11/46
36° 54', 84° 53' 9 9 10 10 10 10 10 10 10
**** **** **** **** **** **** **** **** **** ****
Madisonville 15 5067 5.83 6.86 7.56 7.84 6.91 5.06 4 38 ---4/56 9/79
37° 19', 87° 29' 22 24 24 24 24 24 5
14 8 11 7 11 15 **** ****
Nolin River Lake
(or Reservoir) 15 5834 5.58 6.63 7.15 8.92 6.63 4.73 3.71 37.71 - --4/64 10/79
37" 17', 86° 15' 16 16 16 16 16 16 15
**** **** **** **** **** **** **** ****
* First line of data in the table for each station is mean evaporation in inches; second line
of variation in percent (computed only where there are 10 years or more of record during
Climatological Data (NOAA-EDIS)
is the number of y~ars of record per month; and third line is the coefficient
1956-1970).
**
***
****
Sum of monthly means.
Insufficient data between 1956-70 to compute the coefficient of variation.
~ ~
TABLE I--MEAN MONTHLY, SEASONAL, AND ANNUAL CLASS A PAN EVAPORATION (INCHES)
FOR STATIONS WITH 10 YEARS OR MORE OF RECORD FOR BEST MONTH*
Station May-Nov-Other Record Latest
State Index Oct Apr Season Annual Began Data
No. No.** Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec *** *** *** *** Mo/Yr Mo/Yr
KENTUCKY (continued)
Wolf Creek Dam 15 8807 2 2 4 4.68 5.47 6.35 6.57 5.88 4.58 3.24 2 2 32.09 17 -49 6/48 9/70
36° 52', as• 09' 7 7 7 12 20 23 23 23 23 21 7 6
**** **** **** **** 12 10 9 12 18 12 **** **** 7 **** ****
LOUISIANA
Calhoun Exp Sta 16 1411 2 3.02 4.69 5.59 6.89 7.48 7.56 7.15 5.38 4.35 2.68 2.14 38.81 20 -59 8/60 11/79
32° 31', 92° 20' 7 15 19 19 19 11! 19 20 20 20 28 14
**** **** 17 8 10 8 7 10 6 15 15 **** **** **** ****
LSU Ben-Hur Exp Sta 16 5620 2.31 3.34 4.85 6.43 7.18 7.72 6.69 6.36 5.47 5.23 3.42 2.54 38.65 22.89 -61.54 3/63 12/79
3o• 22', 91• 10' 9 16 17 14 15 16 16 16 17 15 17 15
**** **** **** **** **** **** **** **** **** **** **** **** **** **** ****
Woodworth State Forest 16 9865 1.72 2.16 3.50 4.56 5.82 6.17 6.16 5.80 4.46 3.68 2.10 1.68 32.09 15.72 -47.81 1/57 9/75
31° 08', 92° 28' 14 18 18 17 17 17 17 18 18 17 17 16
22 18 15 13 18 12 14 16 12 14 12 23 9 10 8
MAINE
Caribou WSO AP 17 1175 5.46 5.72 5.80 4.72 3.20 2 27 - --6/63 9/79
46° 52', 68° 01' 10 17 17 16 16 5
**** **** **** **** **** **** ****
New Gloucester 17 5686 6 4.97 6 s.so 3.85 - -
26 -6/63 9/79
43• 57', 1o• 18' 9 10 9 12 11
**** **** **** **** ****
MARYLAND
Beltsville 18 0700 5.13 5.66 6.57 7.31 6.19 4.75 3.34 2.44 33.82 ---5/41 10/79
39° 02', 76° 53' 11 31 36 37 37 34 33 17
**** 9 6 10 13 18 11 **** ****
Savage River Dam 18 8065 5 5.42 5.80 5.98 5.36 4.17 2.73 29.46 -- -
5/51 10/79
39° 31', 79° 08' 8 27 26 26 29 29 27
**** 8 7 8 8 13 18 4
Upper Marlboro 3 NNW 18 9070 4.62 5.67 6.31 6.68 5.85 4.12 2.99 31.62 - - -
4/56 10/79
38° 52', 76° 47' 17 22 23 23 22 22 20
**** 11 8 9 13 11 11 3
* First line of data in the table for each station is mean evaporation in inches; second line
of variation in percent (computed only where there are 10 years or more of record during
Climatological Data (NOAA-EDIS)
is the number of years of record per month; and third line is the coefficient
1956-1970).
**
***
****
Sum of monthly means.
Insufficient data between 1956-70 to compute the coefficient of variation.
TABLE I--MEAN MONTHLY, SEASONAL, AND ANNUAL CLASS A PAN EVAPORATION (INCHES)
FOR STATIONS WITH 10 YEARS OR MORE OF RECORD FOR BEST MONTH*
Station May-Nov-Other Record Latest
State Index Oct Apr Season Annual Began Data
No. No.** Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dac *** *** *** *** Mo/Yr Mo/Yr
MASSACHUSETTS
Rochester 19 693a 3.09 4.53 5.27 5.63 4.77 3.33 2.13 25.66 ---4/52 10/79
41• 47', 1o• ss• 21 2a 2a 2a 2a 2a 27
15 14 14 14 10 11 12
MICHIGAN
Daarborn 20 2015 3.aa s.a6 6.91 7.35 6.1a 3.10 2.99 32.39 - --a/52 9/79
42° 18', 83° 14' 18 30 27 27 26 26 23
**** 14 14 10 10 14 22 ****
East Lansing 20 2395 5 6.18 6.95 7.37 6.14 4.45 2.91 34.00 ---4/56 10/79
42° 43', a4• 2a' 7 23 24 23 24 24 23
**** 14 10 12 6 13 25 5
Germfask Wildlife Refuge 20 3123 4.90 s.a9 6.24 s.oo 2.97 1.91 26.91 - --7/39 10/60
46° 17', as• 57' 18 20 21 22 22 20
**** **** **** **** **** **** ****
~ Lake City Exp Farm 20 4502 5 6.11 6.43 5.31 3.43 2.34 29 - - -
5/60 9/79
(J'I 44• 19', as• 12' a 17 16 1a 17 12
**** **** **** **** **** **** ****
Lupton 1 SW 20 4967 4.ao 5.17 5.62 4.46 2.a7 1.a2 24.74 -- -
5/51 10/79
44° 25', 84° 01' 24 29 29 29 29 26
16 10 17 14 14 40 9
South Haven Exp Farm 20 7690 3.99 5.59 6.61 6.a1 6.06 4.57 3.17 32.a1 - --5/52 9/78
42° 24', a6· 17' 25 27 27 27 27 27 25
7 10 11 8 7 11 14 5
MINNESOTA
Hoyt Lakes 5 N 21 3921 5.12 s.a3 6.15 4.80 2.92 2 27 - -
-5/58 8/79
47° 35', 92° oa• 10 15 14 14 13 8
**** **** **** **** **** **** ****
Lamberton SW Exp Sta 21 4546 5 7.93 9.03 9.02 7.43 5.61 44 - - -
5/66 9/7a
44° 15', 95° 19' 9 13 13 13 13 13
**** **** **** **** **** **** ****
Waseca Exp Sta 21 a692 6 6.43 a.3a a.47 6.73 5.07 - -
41 -4/64 9/79
44° 04', 93° 31' 5 15 15 15 15 15
**** **** **** **** **** ****
* First line of data in the table for each station is mean evapor~tion in inches; 9econd line is the number of years of record per month; and third line is the coefficient
of variation in percent (computed only where there are 10 years or more of record during 1956-1970). ·
** Climatolo~ical Data (NOAA-EDIS)
*** Sum of monthly means.
**** Insufficient data between 1956-70 to compute the coefficient of variation.
TABLE I --MEAN MONTHLY, SEASONAL, AND ANNUAL CLASS A PAN EVAPORATION (INCHES)
FOR STATIONS WITH 10 YEARS OR MORE OF RECORD FOR BEST MONTH*
Station May-Nov-Other Record Latest
State Index Oct Apr Season Annual Began Data
No. No.** Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dac *** *** *** *** Mo/Yr Mo/Yr
MISSISSIPPI
Scott 22 7886 2.12 2.78 4.50 5.87 7.48 8.38 8.15 7.32 5.74 4.36 2.87 2.01 41.43 20.15 -61.58 11/52 11/77
33° 36', 91° 05' 17 19 23 25 25 25 25 24 24 24 25 19
17 21 21 10 11 10 8 6 16 11 11 24 6 **** ****
State University 22 8374 2.28 3.81 4.59 5.99 7.24 7.62 7.77 7.30 5.75 4.49 3.01 2.25 40.17 21.93 -62.10 10/48 11/79
33• 28', as• 48' 24 26 29 31 31 31 31 31 31 32 32 26
22 20 18 10 11 9 13 12 16 13 12 11 8 **** ****
Tunica 2 22 8998 6.49 7.65 8.41 8.81 8.08 5.92 4.84 3.20 43.71 - - -
4/60 10/79
34° 41', 90° 23' 16 17 19 19 18 18 18 12
**** **** 11 13 10 25 22 13 ****
MISSOURI
Columbia (Unlv of Missouri) 23 1800 4.80 5.17 7.06 8.11 6.82 5.76 3.54 2 37.06 - - -
5/16 10/26
38° 59', 92° 28' 22 23 23 24 24 24 24 8 6/36 9/39
**** **** **** **** **** **** **** **** . **** 6/44 10/52
~ Pomme De Terre Dam 23 6777 5.94 7.05 8.51 8.99 8.09 5.22 4.31 42.17 ---6/63 9/78
0) 37° 55', 93° 19' 12 11 14 15 15 14 11
**** **** **** **** **** **** **** ****
St. Louis (Washington U) 23 7470 2.77 4.17 5.32 6.06 6.75 5.82 4.67 2.79 1.53 31.41 - - -
6/38 10/56
38° 39', 90° 19' 11 17 18 19 19 19 19 19 11
**** **** **** **** **** **** **** **** **** ****
Spickard 7 W 23 7963 5.25 6.07 7.01 1!.00 6.98 4.88 3.78 36.72 ---4/59 10/79
40° 15', 93° 43' 15 17 20 17 19 20 17
**** **** 11 **** 8 8 **** ****
Weldon Springs 23 8805 4.85 6.07 7.39 7.28 6.49 4.88 3.72 35.83 -- -
4/57 9/74
38° 42', 90° 44' 10 13 13 17 18 17 14
**** 14 8 14 9 13 18 ****
~
Babb 6 NE 24 0392 5.96 6.28 7.18 6.00 4.24 - -
29.66 -5/50 8/79
48° 56'. 1!3° 22' 19 30 30 29 24
**** 17 12 11 18
Bozeman Agricultural College 24 1044 3.67 5.72 6.17 8.33 7.47 4.73 2.72 35.14 - - -
7/16 10/20
45 ° 40' • 111° 03' 32 39 39 40 40 40 38 5/35 10/69
15 15 19 9 14 20 15 9
* First line of data in the table for each station is mean evaporation in inches; second line is the number of years of record per month; and third line is the coefficient
of variation in percent (computed only where there are 10 years or more of record during 1956-1970).
** Climatological Data (NOAA-EDIS)
*** Sum of monthly means.
**** Insufficient data between 1956-70 to compute the coefficient of variation.
(1.1
.......
TABLE I --MEAN MONTHLY, SEASONAL, AND ANNUAL CLASS A PAN EVAPORATION (INCHES)
FOR STATIONS WITH 10 YEARS OR MORE OF RECORD FOR BEST MONTH*
Station May-Nov-Other Record Latest
State In de" Oct Apr Season Annual Began Data
No. No.** Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec *** *** *** *** Mo/Yr Mo/Yr
MONTANA (continued)
Bozeman 6 W Exp Farm 24 1047 5 5.87 6.76 8.13 7.46 5.07 3 36 - - -
5/67 10/79
45" 40', 111" 09' 6 12 13 13 13 13 7
**** **** **** **** **** **** **** ****
Canyon Ferry P H 24 1470 5.23 6.38 8.33 7.31 4.59 - -31.84 -5/56 9/79
46" 39', Ill" 44' 23 24 24 24 24
14 21 10 10 31
Dillon WMCE 24 2409 5.29 5.62 6.64 5.63 3.70 3 30 - - -
8/50 9/79
45" 12', 112" 38' 22 27 28 30 30 5
16 14 6 8 21 **** ****
Fort Assinniboine 24 3110 5.05 7.27 7.95 9.94 9.17 5.58 - -44.96 -4/48 9/79
48° 30'. 109° 48' 22 28 30 31 31 31
**** 37 26 21 23 32
Fort Peck 24 3175 7.47 7. 70 9.61 9.28 6. 73 4.41 - -
45.20 -5/35 9/56
48" 01', 106" 27' 14 22 22 22 22 15
**** **** **** **** **** ****
Fort Peck P H 24 3176 7.49 8.68 10.67 9.86 5.88 3.56 46.14 - - -
5/56 9/79
48" 01', 106° 24' 23 23 23 23 23 21
17 18 14 13 17 16 7
Hungry Horse Dam 24 4328 5.07 5.82 7.98 6. 77 3.48 2 31 - --8/48 9/79
48" 21', 114" 00' 31 31 31 32 31 9
19 13 12 20 23 **** ****
Huntley Exp Sta 24 4345 5.25 6.88 7.15 8.64 7.84 4.79 --40.55 -8/48 10/79
45" 55', 108" 15' 24 26 28 28 28 28
19 14 18 13 11 14
Malta 24 5337 7.10 7.82 8.73 7.55 4.61 2.75 38.56 - - -
5/26 10/70
48" 21', 107" 52' 45 45 45 45 45 41
11 17 16 15 19 11 10
Moccasin Exp Sta 24 5761 5 6.97 7.79 10.44 9.95 6.51 - -
47 -4/48 9/79
47" 03', 109° 57' 9 26 27 27 27 27
**** 19 20 14 14 22
Sherbourne Lake 24 7150 6.24 5.89 8.34 7.18 4.83 - -
32.48 -5/35 8/48
48° 50', 113" 31' 14 14 14 14 14
**** **** **** **** ****
* First line of data in the table for each station is mean evaporation in inches; second line is the number of years of record per month; and third line is the coefficient
of variation in percent (computed only where there are 10 years or more of record during 1956-1970).
** Climatological Data (NOAA-EDIS)
*** Sum of monthly means.
**** Insufficient data between 1956-70 to compute the coefficient of variation.
TABLE I --MEAN MONTHLY, SEASONAL, AND ANNUAL CLASS A PAN EVAPORATION (INCHES)
FOR STATIONS WITH 10 YEARS OR MORE OF RECORD FOR BEST MONTH*
Station May-Nov-Other Record Latest
State Index Oct Apr Season Annual Began Data
No. No.** Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec *** *** *** *** Mo/Yr Mo/Yr
MONTANA (con t1 nued)
Sidney 24 7560 4.14 6.21 6.89 7. 72 6.64 3.94 2.62 34.02 -- -
5/57 10/79
47° 44', 104° 09' 12 22 22 22 23 23 22
**** 14 19 9 9 20 **** ****
Terry 24 8165 8.00 8.85 10.75 9.51 5.72 4 47 ---8/50 8/74
46. 48', 105• 18' 13 20 22 23 19 5
**** 26 14 15 20 **** ****
Tiber Dam 24 8233 5 6.46 7.02 8.63 7.99 4.78 4 39 ---4/53 9/75
48° 19', 111• 05' 6 21 23 23 23 23 5
**** 14 18 15 13 23 **** ****
Valier 24 8501 6.79 7.05 8.48 7.87 6.47 3.47 40.13 -- -
7/16 8/78
48° 19'. 112° 15' 33 45 46 47 46 10
**** 22 21 16 26 **** ****
Western MOntana Br. Sta 24 8783 6 7 7.99 6. 78 4.27 - -32 -4/66 10/79
46° 20', 114° 04' 5 9 12 13 12
**** **** **** **** ****
(1.1 Yellowtail Dam (Hardin) 24 9240 8.36 8.49 10.56 9.67 6.37 5.15 48.60 ---8/48 9/79
Q) 45° 19', 107° 56' 13 18 18 18 18 11
**** **** **** **** **** **** ****
NE~
Box Butte Exp Sta (or Farm) 25 1045 6 8.36 9.25 11.04 9.98 7.47 5.36 51.46 ---6/48 9/79
42° 08', 102° 57' 8 31 32 32 32 32 19
**** 13 20 14 8 14 **** ****
Bridgeport 25 1145 5.18 6.81 8.02 9.19 8.08 5.7B 3.69 41.57 -- -5/31 9/78
47° 40', 103° 06' 41 48 48 48 48 48 44
17 15 13 11 9 11 19 8
Enders Lake (or Dam) 25 2741 7.49 8.11 9.99 11.36 10.09 7.55 5.03 52.13 ---9/51 10/79
40° 45', 101° 41' 26 28 28 28 28 29 29
13 18 18 14 11 16 21 10
Gavins Point Dam 25 3165 5 7.51 8.45 9. 71 8.37 5.84 4.54 44.42 ---5/61 9/78
42° 51', 97° 29' 5 17 17 17 17 17 14
**** **** **** **** **** **** **** ****
Grand Island WSO AP 25 3395 8.49 10.73 11.14 9.56 6. 75 - -46.67 -4/63 9/79
40° 58', 98° 19' 17 16 15 17 17
**** **** **** **** ****
* First line of data in the table for each station is mean evaporation in inches; second line is the number of years of record per month; and third line is the coefficient
of variation in percent (computed only where there are 10 years or more of record during 1956-1970).
** Climatolo8ical Data (NOAA-EDIS)
*** Sum of monthly means.
**** Insufficient data between 1956-70 to compute the coefficient of variation.
(1.1 c.o
TABLE I --MEAN MONTHLY, SEASONAL, AND ANNUAL CLASS A PAN EVAPORATION (INCHES)
FOR STATIONS WITH 10 YEARS OR MORE OF RECORD FOR BEST MONTH*
Station Hay-Nov-Other Record Latest
State Index Oct Apr Season Annual Began Data
No. No.** Jan Feb Mar Apr Hay Jtm Jul Aug Sep Oct Nov Dec *** *** *** *** Ho/Yr Mo/Yr
NEBRASKA (continued)
Harlan Co Lake (or Dam) 25 3595 6.62 8.64 10.15 11.26 10.10 7.62 5.57 53.34 - - -
5/49 10/79
40° 05', 99° 12' 13 31 30 30 31 31 28
13 18 18 14 15 22 22 13
Holdredge 1 E 25 3911 6.96 7.75 8.22 7.32 5.46 - -35.71 -7/57 9/70
40° 26', 99° 20' 10 11 13 14 12
15 14 12 16 10
Kingsley Dam 25 4455 6.9L 8.21 9. 77 8.52 5.91 4.03 43.35 - --8/38 10/79
42° 13', 101,0 39' 35 40 40 41 41 33
14 18 11 8 12 **** ****
Lincoln Agron Farm 25 4790 5.06 6.93 8.39 9.96 8.40 6.44 4.33 43.82 ---4/17 9/68
40° 51', 96° 37' 41 48 48 50 51 50 46
**** 20 18 19 14 15 35 12
Mead Agronomy Lab 25 5362 7.65 9.19 9.62 7.93 5 --40 -4/69 9/78
41° 10', 96° 25' 10 10 10 10 9
**** **** **** **** ****
Medicine Creek Dam 25 5388 7.08 8.58 10.35 11.45 10.18 7. 72 5.37 53.65 - - -
10/51 10/79
40° 23', 100° 13' 26 28 28 28 28 28 26
17 17 18 11 11 21 26 11
Mitchell 5 E 25 5590 6.54 6.74 8.52 9.08 7.30 5.45 5 42 - - -
4/49 9/79
41° 57', 103° 41' 10 28 29 31 31 30 6
**** 16 10 10 7 13 **** ****
Northeastern Nebr Exp Sta 25 6018 8.47 9.54 10.28 8.02 6.16 - -
42.47 -5/63 9/79
42° 43', 96° 57' 13 13 13 13 14
**** **** **** **** ****
North Platte Exp Farm 25 6075 6.28 9.30 9.42 11.22 9.93 7.40 6.53 53.80 ---5/49 10/79
41° 04', 100° 45' 24 28 30 30 30 30 14
19 16 15 15 10 18 **** ****
Omaha (North) WSFO 25 6260 7.80 8.82 8. 70 7.94 5.75 4.81 43.82 - - -
6/58 9/79
41 ° 22., 96 ° 01. 20 22 22 22 23 17
14 10 10 7 13 13 3
Red Willow 25 7110 7.29 8.82 10.35 11.49 10.16 7.38 5.55 53.75 - -
-4/62 7/79
40° 21•, 1ooo 39' 17 18 18 18 17 17 14
**** **** **** **** **** **** **** ****
* First line of data in the table for each station is mean evaporation in inches; second line is the number·of years of record per month; and third line is the coefficient
of variation in percent (computed only where there are 10 years or more of record during 1956-1970).
** Climatological Data (NOAA-EDIS)
*** Sum of monthly means.
**** Insufficient data between 1956-70 to compute the coefficient of variation.
~
0
NEBRASKA (continued)
Rosemont
40° 16', 98° 22'
Trenton Dam
40" I 0', 101 • 04'
Valentine Lakes Game Refuge
42° 35'' 100° 41'
NEVADA
Boulder City
35° 59', 114" 51'
Central Nev Field Lab
39° 23', 117° 19'
Fallon Exp Sta
39° 27', 118° 47'
Lahonton Dam
39° 28', 119° 04'
Lamoille Power House
40° 41', 115° 26'
Ruby Lake
40° 12', 115° 30'
Rye Patch Dam
40° 28', 118° 18'
Silverpeak
37" 40', 117" 35'
Station
State Index
TABLE I --MEAN MONTHLY, SEASONAL, AND ANNUAL CLASS A PAN EVAPORATION (INCHES)
FOR STATIONS WITH 10 YEARS OR MORE OF RECORD FOR BEST MONTH*
Hay-Nov-
Oct Apr
No. No.** Jan Feb Mar Apr Hay Jun Jul Au.o; Sep Oct Nov Dec *** ***
Other
Season
***
25
25
25
26
26
26
26
26
26
26
26
7330
8628
8755
1071
1630
2780
4349
4395
7123
7192
7463
3.44
40
15
4.43
39
18
7.49
40
11
4.21
13
7.59
14
****
7.17
22
17
10.77
42
10
6
8
****
5.75
13
9.39
19
16
8.74
25
18
6.83
27
16
13.87
41
8
9
8
****
7.34
15
10.31
20
17
10.49
25
21
7.69
30
13
16.26
42
8
10.75
11
****
8.52
16
11.47
20
13
12.06
26
12
8.67
30
11
16.14
41
8
12.25
10
****
9.21
16
10.72
20
16
10.98
26
13
7.74
29
8
14.07
43
8
11
9
****
7.86
16
8.19
20
29
8.01
26
22
6.20
20
25
5.46
24
23
5.94 4.51
25 12
16 ****
11.42
42
7
8.61
10
****
7.75
41
10
5.11
10
****
5.49 3.75
16 15
4.59
39
15
2.99
13
**** **** **** **** **** **** **** **** ****
8
5
****
5
7
9.78
15
****
11.56
23
15
6.29 7.45
24 24
13.96
23
7
9.78
24
12.37
23
11
8.92
24
8.07
23
8
4.85
11
****
6.40 3.83
24 24
**** **** **** **** **** **** ****
10
7
7.78 9.65 10.94
10 14 15
9.77
15
5.97
16
4
9
**** **** **** **** **** ****
8.55 9.95 12.80 11.30 8.12 4.90
25 27 27 28 24 17
**** **** **** **** **** ****
11
8
18.21
10
17.72
10
16
8
12
9
7
8
3
6
**** **** **** **** **** **** **** ****
3.30
35
16
56.28
13
55.74
13
4!.38
****
79.51
3
57
****
42.17
****
60.59
****
42.67
****
48
****
55.62
****
82
****
34.02
****
Record
Annual Began
*** Ho/Yr
6/48
5/54
6/48
113.53 1/49
****
4/56
3/50
4/48
7/16
5/49
7/40
3/68
Latest
Data
Ho/Yr
10/67
10/79
8/79
12/79
10/79
11/79
5/74
8/47
9/79
10/79
11/79
* First line of data in the table for each station is mean evaporation in inches; second line
of variation in percent (computed only where there are 10 years or more of record during
Climatological Data (NOAA-EDIS)
is the number of years of record per month; and third line is the coefficient
1956-1970).
**
*** ****
Sum of monthly means.
Insufficient data between 1956-70 to compute the coefficient of variation.
TABLE I --MEAN MONTHLY, SEASONAL, AND ANNUAL CLASS A PAN EVAPORATION (INCHES)
FOR STATIONS WITH 10 YEARS OR MORE OF RECORD FOR BEST MONTH*
Station May-Nov-Other Record Latest
State Index Oct Apr Season Annual Began Data
No. No.** Jan Feb Mar Apr Hay Jun Jul Aug Sep Oct Nov Dec *** *** *** *** Mo/Yr Ho/Yr
~ (continued)
Topaz Lake 26 8970 7 9.85 10.99 12.96 11.95 8.86 6.11 59.65 ---7/57 7/70
38" 41', 119" 02' 5 12 lfi 18 18 16 16
**** 8 17 10 15 11 9 ****
NEW HAMPSHIRE
Lakeport 2 27 4480 5.08 5.85 6.58 5.73 3.93 2.74 29.91 ---5/52 10/79
43" 33', 71" 24' 20 25 25 25 25 17
**** 12 10 7 7 17 ****
Hassabesic Lake 27 5211 3 4.40 5.06 5.58 4. 51 2.Q4 1.94 I 24.43 - - -5/42 11/55
42" 59', 71" 24' 7 14 15 16 16 16 15 5
**** **** **** **** **** **** **** **** ****
NEW JER~
Canoe Brook 28 1335 4.78 4.92 5.52 4.65 3.38 2.19 25.44 ---4/31 9/79
~ 40" 45', 74" 21' 40 44 44 44 43 37
18 12 20 13 17 12 9
New Brunswick 28 6055 5.81 6.51 R.33 7.14 4.54 3.04 35.37 - - -6/68 10/79
40" 28', 74" 26' 11 12 12 12 12 11
**** **** **** **** **** **** ****
Pleasantville 28 7131 4.15 5.63 5.85 6.58 5.67 4.01 2.68 I. 95 30.42 ---4/37 6/58
39° 25', 74" 31' 13 21 22 21 21 21 21 14
**** **** **** **** **** **** **** **** ****
Runyun 28 7825 5.09 5.21 5.64 5.07 4.12 2.62 2 27.75 ---5/35 11/48
40" 26', 74° 20' 14 14 14 14 14 14 5
**** **** **** **** **** **** **** ****
NEW MEXICO
Abiquiu Dam 29 0041 7.83 10.21 11.83 10.79 9.50 7.59 5.66 55.58 - --4/64 12/79
36" 14', 106° 26' 13 16 16 16 16 16 16
**** **** **** **** **** **** **** ****
Agricultural College 29 0!31 3.01 4.44 7.69 10.01 11.75 13.01 11.95 10.27 8.36 6.17 3.89 2.73 61.51 31.77 -93.28 10/18 12/48
32° 17', 106° 45' 36 36 36 36 36 36 36 36 36 37 37 37
**** **** **** **** **** **** **** **** **** **** **** **** **** **** ****
* First line of data in the table for each station is mean evaporation in inches; second line is the number of years of record per month; and third line is the coefficient
of variation in percent (computed only where there are 10 years or more of record during 1956-1970). ·
** Climatological Data (NOAA-EDIS)
*** Sum of monthly means.
**** Insufficient data between 1956-70 to compute the coefficient of variation.
~
1\)
NEW MEXICO (continued)
Alamogordo Dsm
34° 36', 104° 23'
Animas
31° 57'. 108" 49'
Bitter Lakes Wild Rfg,
33° 29', 104" 24'
Bosque del Apache
33° 46', 106° 54'
Caballo Dsm
32° 54', 107" 18'
Capulin Nat'l Mon
36" 47', 103° 58'
Clovis 13 N
34° 36', 103° 13'
Eagle Nest
36° 33', 105° 16'
E1 Vado Dam
36° 36', 106" 44'
Elephant Butte Dam
33" 09', 107° 11'
Estancia
34° 45', 106° 04'
Station
State Index
TABLE I--MEAN MONTHLY, SEASONAL, AND ANNUAL CLASS A PAN EVAPORATION (INCHES)
FOR STATIONS WITH 10 YEARS OR MORE OF RECORD FOR BEST MONTH*
May-Nov-
Oct Apr
No. No.** Jan Feb Mar Apr May Jun Jul Au.o; Sep Oct Nov Dec *** ***
Other
Season
***
29 0205
29 0417
29 0992
29 1138
29 1886
29 1454
29 1963
29 2700
29 2837
29 2848
29 3060
3.82
24
****
2.92
17
35
4.66
31
23
4.34
23
20
3.57 3.52
12 16
**** ****
4.45
32
24
3.28
63
25
5.41
34
15
4.07
14
23
4.85
63
16
8.51
31
19
7.28
24
18
7. 79
16
****
9.05
37
16
6.94
24
26
8.53
63
17
11.12
35
13
10.98
12
13.18
36
11
14.38
10
14.95
36
10
14.25
36
11
14.40 12.87
11 12
12.38
36
12
11.19
13
10.14
36
19
8.62
10
7.35 4.87
36 31
19 17
6. 77
10
**** **** **** **** **** **** ****
10.14
24
8
10.38
14
5
12.20
36
7
9.10
28
12
11.75
63
8
11.73
24
10
11,38
16
6
14.23
36
8
12.94
21
10
13.41
17
3
16.19
36
7
9,73 10.90
12 14
12.37
25
15
11.48
18
6
13.66
37
8
10.24
13
10.83
24
8
10.52
17
12
12.00
37
10
9.41
12
8.46
22
14
8.12
17
17
9.75
37
16
8.22
12
6.20 3,63
22 20
19 17
6.56
17
13
3. 31
12
13
7.28 4.92
37 33
16 16
**** **** **** **** ****
10.56
28
16
11.83
28
14
7.55 8.25
25 32
**** ****
8.06
32
15
14.45
64
9
9.36
38
10
16.17
64
6
9.00 8.97
10 12
11.56
28
17
7.62
35
12
8.89
39
12
13.64
63
8
9.87
28
15
6. 74
36
17
7.38
39
18
11.63
64
10
8.09
29
22
5. 76
33
19
6.19 4.43
29 27
15 23
6.29 4.68 4.38
13 39 22
25 **** ****
9.72
64
18
7.70 4.75
64 63
14 18
8.29 7.40 5.90
12 11 12
**** **** **** **** ****
3. 79
26
****
2.72
18
26
2.84
14
****
3.51
33
24
3.73
12
24
3. 21
62
17
72.25
8
68.23
****
62.53
6
61.4"7
5
73.11
6
56.39
12
44.66
****
73.31
6
36.77
****
31.03
****
31.65
****
39.54
48.50
35.92
36.37
8
39.56
Record
Annual Be~an
*** Mo/Yr
109.02 1/39
****
1/67
93.56 1/51
****
93.39 1/49
****
112.65 3/42
6
5/63
4/51
8/34
7/36
109.68 4/16
6
5/66
Latest
Data
Mo/Yr
11/73
11/79
10/79
10/73
10/79
9/79
11/79
9/79
10/75
12/79
9/79
* First line of data in the table for each station is mean evaporation in inches; second line is the number of years of record per month; and third line is the coefficient
of variation in percent (computed only where there are 10 years or more of record durin~ 1956-1970),
** Climatological Data (NOAA-EDIS)
*** Sum of monthly means.
**** Insufficient data between 1956-70 to compute the coefficient of variation.
~
(IJ
NEW MEXICO (continued)
I
Farmington 4 NE
36° 45 •, 108• IO'
Florida
32 ° 36.' 107 ° 29.
Jornada Exp Range
32° 37', 106° 44'
Lake Avalon
32" 29', 104° 15'
Los Lunas
34° 46', 106" 45'
Navajo Dam
36° 49', 107° 37'
Portales 7 WNW
34" 11', 103° 21'
Roswell
33° 18', 104° 32'
Santa Fe
35• 40', 105• 55'
State University
32° 17'. 106° 45'
Tucumcari 3 NE
35" 12', 103° 41'
Station
State Index
TABLE I--MEAN MONTHLY, SEASONAL, AND ANNUAL CLASS A PAN EVAPORATION (INCHES)
FOR STATIONS WITH 10 YEARS OR MORE OF RECORD FOR BEST MONTH*
No. No.** Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
May-
Oct
***
Nov-
Apr
***
Other
Season
***
29 3134
29 3225
29 4426
29 4736
29 5150
29 6061
29 7014
29 7609
29 8072
29 8535
29 9156
3.84
21
4.79
35
8.02
35
7.33
12
****
10.93
38
8.37
17
9
13.07
36
10.42
19
11
14.86
36
10.01
18
9
11.91
37
8.89
18
13
10.29
38
6.62
18
10
8.63
38
6.80
38
4.45
34
4.07
28
**** **** **** **** **** **** **** **** **** **** **** ****
3.00
23
37
4. 77
20
29
3.36
23
4.35
24
28
5. 78
25
15
4.30
24
7.38
26
19
9.46
26
18
8.04
26
10.23
27
14
12.49
26
13
8.24
17
12.12
27
9
14.47
26
9
9.95
17
13.32
26
14
15.76
26
11
10.98
16
10.88
27
26
14.50
26
14
10.38
17
9.87
26
11
12.57
25
10
9.18
17
7.89
25
11
9.38
26
12
6.66
16
5.94
25
19
7.71
26
IS
4.68
16
**** **** **** **** **** **** ****
7.32 10.42 11.81 11.76 10.01 7.45 5.40
20 23 22 23 24 23 24
**** **** **** **** **** **** ****
9.20
27
10.66
27
12.57
27
11.82
27
10.90
27
8.42
26
6.24
26
3.75
24
31
5.45
23
20
4.58
25
2. 72
21
44
4.42
18
20
3.40
24
**** **** **** **** **** **** **** **** **** **** **** ****
2.79
10
4
9
6
9
8.25
10
10.61
10
11.01
10
9.60
10
8.67
10
6.58
10
3.84
10
2.93
10
**** **** **** **** **** **** **** **** **** **** ****
1.49
17
****
3.03
24
19
2.13
17
****
4.29
4
8
3.91
18
****
7.48
24
13
6.39
19
****
10.14
24
4
10.55
21
8.98
30
****
12.44
24
7
12.21
22
10.75
36
13
13.42
24
5
13.28
22
9.52
36
9
12.04
24
8
16.91
22
8.09
36
17
10.56
24
9
11.23
22
6.97
37
16
8.13
24
10
11.23
22
4.89
36
21
6.14
24
12
8.92
22
**** **** **** **** **** **** ****
2.51
20
****
3.78
24
15
1.39
17
****
2.76
24
19
51.64
65.56 36.10
**** ****
60.02 31.43
10 21
73.62 42.21
8 ****
51.83
****
56.85
****
60.61 32.88
**** ****
48.31
****
49.20 17.82
**** ****
62.73 31.48
4
73.10
Record
Annual Began
*** Mo/Yr
3/49
101.66 10/38
****
91.45 1/53
14
115.83 12/51
****
3/62
8/36
93.49 4/34
****
2/40
67.02 6/16
****
94.21 1/56
4
4/56
Latest
Data
Mo/Yr
9/79
9/79
8/79
10/78
11/79
10/79
8/60
1/51
11/55
12/79
9/79
* First line of data in the table for each station is mean evaporation in inches; second line
of variation in percent (computed only where there are 10 years or more of record during
Climatological Data (NOAA-EDIS)
is the number of years of record per month; <s.d third line is the coefficient
1956-1970).
**
***
****
Sum of monthly means.
Insufficient data between 1956-70 to compute the coefficient of variation.
TABLE I --MEAN MONTHLY, SEASONAL, AND ANNUAL CLASS A PAN EVAPORATION (INCHES)
FOR STATIONS WITH 10 YEARS OR MORE OF RECORD FOR BEST MONTH*
Station May-Nov-Other Record Latest
State Index Oct Apr Season Annual Began Data
No. No.** Jan Feb Mar Apr Hay Jun Jul Aug Sep Oct Nov Dec *** *** *** *** Mo/Yr Mo/Yr
NEW MEXICO (continued)
Ute Dam 29 9284 8.22 8 10.66 10.76 11.01 9.60 7.12 6.25 4.93 55.40 ---2/65 11/79
35° 21 '. 103° 27' 10 9 11 14 14 15 14 14 10
**** **** **** **** **** **** **** **** **** ****
NEW YORK
Aurora Research Farm 30 0331 5.26 6.36 6.98 5.78 4.04 2.79 31.21 ---5/57 5/78
42° 44', 76° 39' 22 21 21 21 21 20
13 8 13 11 13 20 8
Boonville 2 SSW 30 0785 5.23 5.92 6.47 5.36 3.40 2.69 29.07 ---5/50 10/73
43° 27', 75° 21' 22 24 24 24 24 22
11 13 16 11 R 21 9
Canton 4 SE (Canton 3 SE) 30 1185 5.83 7.33 6.93 5.57 3.65 2.65 31.96 ---7/62 9/79
44° 34', 75° 07' 14 16 17 17 17 13
**** **** **** **** **** **** ****
~ Downesville Dam 30 2169 4.66 5.09 5.51 4.88 3.32 2.15 25.61 ---5/59 10/79
~ 42° 05', 74° 58' 21 20 20 21 21 21
18 12 14 9 12 20 9
Geneva Res Farm (or Exp Sta) 30 3184 4 5.59 6.70 7.60 6.03 4.10 2.73 32.75 ---5/61 10/79
42° 53', 77° 02' 8 16 16 15 15 15 14
**** **** **** **** **** **** **** ****
Greenport Power House 30 3464 5 5.50 6.18 5.20 3.95 3.30 29 - --6/59 10/79
41° 06', 72° 22' 8 14 15 16 13 12
**** **** **** **** **** **** ****
Lockport 4 NE 30 4849 4 4.77 5.87 6.42 5.40 3.68 2.35 25.62 ---6/61 10/79
43° 12', 78° 38' 7 18 19 19 19 19 18
**** **** 12 14 9 12 **** ****
Mineola 1 W 30 5377 3 4.82 6.31 7.19 8.00 6.73 5.32 3.74 2 37.29 ---4/56 10/67
40° 44', 73" 38' 7 12 12 12 12 12 11 12 8
**** **** **** **** **** **** **** **** **** ****
Mt. Pleasant Farm 30 5604 5.09 5.90 6.35 5.49 3.83 2.55 29.21 - --5/57 10/77
42° 27', 76" 22' 21 21 21 21 21 21
15 9 12 10 13 16 7
New York Central Park 30 5801 4.11 5.06 6.02 7.86 5.88 4 3.01 2 32 - --4/44 10/58
40° 47', 73" 58' 7 15 14 14 14 9 15 6
**** **** **** **** **** **** **** **** ****
* First line of data in the table for each station is mean evaporation in inches; second line is the number of years of record per month; and third line is the coefficient
of variation in percent (computed only where there are 10 years or more of record during 1956-1970).
** Climatolosical Data (NOAA-EDIS)
*** Sum of monthly means.
**** Insufficient data between 1956-70 to compute the coefficient of variation.
~
01
NEW YORK (continued)
Voorheesville
42° 39', 73° 54'
NORTH CAROLINA
Cataloochee
35• 37', sJ• 06'
Chapel Hill 2 W (Chapel Hill)
35° 55', 79° 06'
Lumberton 6 NW
34" 42', 79° 04'
Kaysville, (Hoffman Forest)
34° 50'. 77° 18'
Murphy
35" 04', 84° 00'
W. Kerr Scott Reservoir
36° 08', 81° 14'
NORTH DAKOTA
Carington 4 N
47° 31', 99° 07'
State
No.
30
31
31
31
31
31
31
32
Devils Lake KDLR (or WB city) 32
48° 07', 98° 52'
Edgeley Exp Farm
46° 20', 98° 42'
32
Station
Index
TABLE I --MEAN MONTHLY, SEASONAL, AND ANNUAL CLASS A PAN EVAPORATION (INCHES)
FOR STATIONS WITH 10 YEARS OR MORE OF RECORD FOR BEST MONTH*
Other
Season
No.** Jan Feb Mar Apr Kay Jun Jul Aug Sep Oct Nov Dec
Kay-
Oct
***
Nov-
Apr
*** ***
None
1564
1677
5177
5420
6001
9555
1362
2158
2482
1.55 1.84
25 26
**** ****
2.52 2.78
10 13
3.58
49
23
4.83
15
3.58
10
5.05
24
5.57
24
6.16
24
5.20
25
3.52
25
2.30
25
**** **** **** **** **** ****
3.86 4.08
12 12
4.14
13
3.94
13
2.88 2.39
12 11
**** **** **** **** **** **** ****
4.85
56
12
6.65
16
5.60
57
11
7.23
17
6.14
58
9
7.42
17
6.20
58
13
7.63
17
5.64
57
12
6.86
17
4.48
58
17
5.23
18
3.15
57
17
4.24
18
1.99
54
13
2.77
18
1.43
30
****
1.96
12
**** **** **** **** **** **** **** **** **** **** **** ****
1.81
20
12
1.09
35
30
2.57
25
11
1.46
38
20
3.97
30
13
2.90
41
19
5.65
30
6
4.19
42
14
5
9
6.55
30
8
5.16
42
11
5.42
15
6.54
29
9
5.57
41
10
5.91
15
6.88
29
8
5.07
42
9
5.91
15
6.16
29
12
5.05
41
10
5.53
15
4.54
30
10
3.87
41
12
4.19
15
3.35
30
11
2.77
41
17
3.21
13
2.24
30
10
1.60
40
15
2
5
**** **** **** **** **** **** **** ****
8.15
10
8.46
13
8.70
13
8.20
12
6.15
13
4
6
**** **** **** **** **** ****
3.57
13
****
6.08
16
17
4.35 6.66
12 19
**** 13
6.00
19
19
6.98
19
16
6.94
18
11
7.78
19
8
6.17
18
15
7.55
18
16
3.96 3
19 5
22 ****
3.88
17
13
1.58
25
19
1.02
36
26
27.80
****
21.39
****
31.21 15.24
7 ****
38.61 21.51
**** ****
34.02 17.82
5 3
27.49 12.26
6 12
30.17
****
43
****
32
****
37.20
Annual
***
46.45
****
60.12
****
51.84
****
39.75
5
Record
Began
Mo/Yr
8/17
4/66
4/21
1/62
1/50
12/34
5/65
5/67
5/51
9/50
Latest
Data
Mo/Yr
10/41
10/79
10/79
11/79
12/79
7/76
10/79
9/79
10/70
7/69
* First line of data in the table for each station is mean evaporation in inches; second line
of variation in percent (computed only where there are 10 years or more of record during
Climatological Data (NOAA-EDIS)
is the number of years of record per month; and third line is the coefficient
1956-1970).
**
***
****
Sum of monthly means.
Insufficient data between 1956-70 to compute the coefficient of variation.
TABLE I--MEAN MONTHLY, SEASONAL, AND ANNUAL CLASS A PAN EVAPORATION (INCHES)
FOR STATIONS WITH 10 YEARS OR MORE OF RECORD FOR BEST MONTH*
Station May-Nov-Other Record Latest
State Index Oct Apr Season Annual Began Data
No. No.** Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dac *** *** *** *** Mo/Yr Mo/Yr
NORTH DAKOTA (continued)
Fargo WSO AP 32 2859 7.25 7.73 8.87 7.76 5.36 4 41 - - -4/63 9/79
46° 54', 96° 48' 14 16 15 16 15 9
**** **** **** **** **** **** ****
Riverdale 32 7585 6 7.31 7.81 9.09 8.69 6.03 4.15 43.08 -- -7/49 9/79
47° 30'. 101° 21' 7 28 30 31 31 30 15
**** **** **** **** **** **** **** ****
Williston 32 9430 7.02 7.89 9.34 9.07 5.68 4 43 - - -8/56 9/79
48° 08', 103" 45' 22 23 23 23 23 5
**** **** **** **** **** **** ****
OHIO
Charles Mill Lake (or Dam) 33 1466 3.59 4.98 5.90 6.21 5.48 4.01 2.65 29.23 - - -
4/39 10/79
40° 44', 82" 22' 39 41 41 41 41 41 41
19 16 9 10 8 12 17
~ Columbus University Farm 33 1782 5 5.69 6.83 7.27 6.23 4.76 3.29 34.07 - --4/58 10/70
<» 40° 00', 83" 03' 8 13 14 13 14 13 12
**** 15 11 15 11 34 27 11
Columbus (Ohio State Univ) 33 1788 3.33 4.45 5.29 5.66 4.79 3.53 2.14 25.86 - - -
6/18 11/55
40" 00', 83" 00' 35 36 37 38 38 37 38
**** **** **** **** **** **** **** ****
Coshocton Agric Rsch Station 33 1905 4.99 6.01 6.71 7.05 6.21 4.72 3.59 34.29 - - -
4/56 9/79
40° 22', 81" 48' 13 23 24 23 24 21 20
**** **** **** **** **** **** **** ****
Dayton 33 2067 4.04 5.65 6.77 7.06 6.20 4.63 2.86 33.17 - - -4/37 10/69
39° 45', 84° 10' 32 31 32 32 32 32 32
18 15 7 11 10 9 16 6
Deer Creek 33 2090 5 6 7 6.63 6 3.67 3 32 - - -
6/70 11/79
39" 30', 83° 13' 7 9 9 10 9 10 10
**** **** **** **** **** **** **** ****
Senecaville Lake (or Dam) 33 7559 4.35 5.52 6.32 6.35 5.73 4.30 2.99 31.21 - - -
4/39 10/79
39" 55', 81" 26' 34 38 38 38 39 39 37
20 14 10 24 7 15 38 8
Tom Jenkins Lake 33 8378 4 5.08 5.39 5.45 4.72 3.61 2.52 1 26.77 ---7/53 11/79
39° 33', 82° 04' 9 26 26 27 27 27 26 7
**** 12 9 11 10 11 15 **** 6
* First line of data in the table for each station is mean evaporation in inches; second line is the number of years of record per month; and third line is the coefficient
of variation in percent (computed only where there are 10 years or more of record during 1956-1970).
** Climatological Data (NOAA-EDIS)
*** Sum of monthly means.
**** Insufficient data between 1956-70 to compute the coefficient of variation.
~ ......
OHIO (continued)
Wooster Exp Station
40° 47', 81" 36'
~
Altus Dam
34" 53', 99" 18'
Atoka Dam
34° 27', 96" 04'
Broken Arrow Dam
34° 08', 94" 42'
Canton Dam
36° 05'' 98" 36'
Chickasha Exp Station
35° 03', 97° 55'
Fort Gibson Dam
35° 52', 95° 14'
Fort Supply Dam
36° 33', 99° 35'
Goodwell Research Station
36° 31', 101° 37'
Grand River Dam
36° 28', 95° 03'
Great Salt Plains Dam
36° 45', 98° 08'
Station
State Index
TABLE I --MEAN MONTHLY, SEASONAL, AND ANNUAL CLASS A PAN EVAPORATION (INCHES)
FOR STATIONS WITH 10 YEARS OR MORE OF RECORD FOR BEST MONTH*
May-Nov-
Oct Apr
No. No.** Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dac *** ***
Other
Season
***
33 9312
34 0184
34 0394
34 1168
34 1445
34 1750
34 3286
34 3304
34 3628
34 3700
34 3740
3.89
12
****
3
9
5.73
24
****
4.79
13
4.03
36
19
8.23
30
21
7.75
12
5.23
48
17
9.71
28
10
7.60
16
6.31
48
10
11.43
31
18
8.78
17
6.80
49
12
12.29
30
15
10.53
17
5.81
49
10
11.48
30
11
9.82
17
4.35
51
12
8.14
26
****
2.71
so
21
6.47 4.65
24 14
**** ****
6.98 5.67 3.92
15 16 16
**** **** **** **** **** **** **** ****
6.15
15
7.12
15
8.12
15
8.92
14
8.40
15
5.91
16
4.66
15
2.95
13
4
9
****
2.01
11
31.21
8
59.52
****
49.38
****
43.13
**** **** **** **** **** **** **** **** **** **** **** ****
3 4.00
6 10
**** ****
2.00
21
23
2.87
26
16
3 6
6 8
**** ****
6.71
22
31
4.73
30
26
6.87
18
34
5.21
12
****
6.26
12
****
7.96
29
15
6.43
32
14 -
9.26
31
17
8.40
32
19
9.38
21
18
7.14
32
15
9.92
39
13
10 11.51
9 24
**** 20
6.98
25
18
7.38
24
****
7.33
30
22
9.06
29
16
9.98
32
13
11.27
25
13
8.60
32
7
11.99
39
13
13.33
29
16
8.94
34
13
11.52
29
18
11.53
31
18
11.79
26
16
9.25
32
11
12.77
40
28
14.46
31
15
9.63
35
13
13.05
30
20
10.93
31
21
10.33
26
14
8.77
31
13
11.87
40
15
12.07
31
14
9.22
36
22
11.80
30
14
8.23
31
33
7.45
26
19
6.51
31
19
9.01
40
24
9.42
30
20
6.84
35
29
8.45
31
20
6.06
30
23
5.56
26
16
5.06
31
15
4.03
23
20
4
6
13
3.26
30
16
6.58 4.36
39 23
25 22
7.33
20
25
5.05
36
17
6.42
30
22
3.29
16
****
3.93
14
****
2.48
12
30
2.23
24
15
2.72
11
****
2.00
10
****
55.13
17
55.78
9
44.27
8
62.14
12
68.12
****
47.01
****
67.68
****
27.75
****
21.52
11
32
****
Record
Annual Began
*** Mo/Yr
82.88
****
65.79
8
94
****
7/16
3/48
6/63
9/64
3/48
6/53
3/48
7/40
4/48
4/41
3/48
Latest
Data
Mo/Yr
10/79
10/79
11/79
10/79
7/79
10/79
7/79
12/79
9/79
11/77
10/79
* First line of data in the table for each station is mean evaporation in inches; second line
of variation in percent (computed only where there are 10 years or more of record during
Climatological Data (NOAA-EDIS)
is the number of years of record per month; and third line is the coefficient
1956-1970).
**
***
****
Sum of monthly means.
Insufficient dsta between 1956-70 to compute tbe coefficient of variation.
~
(X)
OKLAHOMA (continued)
Heyburn Dam
35° 57', 96° 17'
Keystone Dam
36° 09', 96° 15'
Lake Overholser
35° 29', 97° 40'
Norman University
35° 13', 97° 26'
Oologah Dam
36° 26', 95° 41'
Stillwater 2 W
36° 07', 97° 05'
Tenkiller Ferry Dam
35° 36', 95° 03'
Tipton 4 S
34° 26', 99° 08'
Wister Dam
34° 56', 94° 43'
Woodward Field Station
36° 25', 99° 24'
OREGON
Aator Exp Station
46° 09'. 123° 49'
Station
State Index
TABLE I --MEAN MONTHLY, SEASONAL, AND ANNUAL CLASS A PAN EVAPORATION (INCHES)
FOR STATIONS WITH 10 YEARS OR MORE OF RECORD FOR BEST MONTH*
Hay-Nov-
Oct Apr
No. No.** Jan Feb Mar Apr Hay Jun Jul Aug Sep Oct Nov Dec *** ***
Other
Season
***
34 4098
34 4812
34 4978
34 6391
34 6729
34 8501
34 8769
34 8879
34 9724
34 9762
35 0318
5.13
11
6.90
12
6.57
13
8.05
13
8.94
14
8.26
14
6.57 4.86
14 14
2.99
11
2
6
43.25
**** **** **** **** **** **** **** **** **** **** ****
3
7
****
2.52
11
****
1
6
3
8
****
4.14
10
****
2.65
19
****
1.05
11
5
9
****
5.19
12
6.73
18
15
6.15
20
17
5.90
18
6.83
17
****
7.60
23
23
6.57
18
fl.77
20
10
8.60
24
15
9.03
19
9.77
19
14
9.45
25
15
9.15
18
8.89
20
14
8.71
26
17
8.70
18
6.16
21
15
6.44
25
24
6.81
19
5.04
19
18
4.67
23
16
3.27
13
****
4.72 2.69
18 13
**** **** **** **** **** **** **** **** ****
5.52
15
33
4.72
22
27
6.55
28
31
4.73
25
****
1.64
11
7.06
22
29
7.78
14
****
5.92
30
13
8.56
39
19
5.89
26
14
6.75
30
18
2.34
10
8.22
22
17
8.13
24
18
6.51
30
11
10.01
39
19
6.38
28
12
7.78
31
18
3.92
11
9.04
23
15
9.80
27
12
7.64
'31
8
12.35
40
12
7.78
28
13
9.40
31
14
4.10
11
11.57
22
14
11.20
29
21
8.79
30
10
13.12
41
17
8.46
27
9
10.74
31
14
4.75
11
10.30
24
16
10.00
28
17
8.33
30
16
11.80
41
12
7.67
27
13
9.63
31
14
4.32
11
7.00
23
14
7.68
27
12
6.04
30
21
8.84
40
20
5.79
26
15
7.09
31
25
3.11
11
5.52
23
20
5.93
27
16
4.51
29
21
6.50
38
22
4.35
26
18
1.76
11
3.26
19
26
4
7
****
2.91
26
19
3.94
29
26
2.93
26
18
1
9
2
8
****
1.68
15
****
3.33
13
40
2.27
16
****
1
9
**** **** **** **** **** **** **** **** **** **** **** ****
45.46
****
45.47
11
44.98
****
51.65
10
52.74
11
41.82
9
62.62 29.46
11 ****
40.43 20.99
9 ****
21.96 8
**** ****
51.39
Record Latest
Annual Began Data
*** Mo/Yr Mo/Yr
4/49 11/64
9/59 10/79
4/52 8/79
5/37 6/56
8/56 8/79
6/48 10/79
4/49 6/79
92.08 7/38 10/78
****
61.42 1/48 6/79
****
4/48 6/79
30 1/49 10/73
****
* First line of data in the table for each station is mean evaporation in inches; second line is the number of years of record per month; and third line is the coefficient
of variation in percent (computed only where there are 10 years or more of record during 1956-1970).
** Climatological Data (NOAA-EDIS)
*** Sum of monthly means.
**** Insufficient data between 1956-70 to compute the coefficient of variation.
~
<0
OREGON (continued)
Corvalis State College
44" 38'' 123° 12'
Cottage Grove Dam
43" 43'' 123" 03'
Detroit Dam
44" 43', 122"•15'
Dorena Dam
43" 47'' 122" 58'
Fern Ridge Dam
44" 07'' 123° 18'
Lookout Point Dam
43" 55', 122° 46'
Halheur Branch Exp Station
43" 39', 117" 01'
Halheur Refuge Headquarters
43" 17', 118" 50'
Medford Exp Station
41" 18'' 122" 52'
Moro
45" 29', 120" 43'
N. Willamette Exp Station
45" 17', 122" 45'
Station
State Index
TABLE I --MEAN MONTHLY, SEASONAL, AND ANNUAL CLASS A PAN EVAPORATION (INCHES)
FOR STATIONS WITH 10 YEARS OR MORE OF RECORD FOR BEST MONTH*
No. No.** Jan Feb Mar Apr Hay Jun Jul Aug Sep Oct Nov Dec
Hay-
Oct
***
Nov-
Apr
***
Other
Season
***
35 1862
35 1902
35 2292
35 2374
35 2867
35 5050
35 5160
35 5162
35 5424
35 5734
35 6151
0.36 0.90
11 18
**** ****
0.63
15
32
1
5
1.07
32
23
1.44
10
2.23
14
****
1.95
10
****
2.02
23
36
2.81
11
****
2.36
32
17
2.65
12
3.10
57
18
3.08
15
****
2.70
16
****
2.68
15
****
3.13
28
18
3.48
14
****
5.18
26
18
3.77
42
17
5.20
22
18
3.49
15
4.51
57
19
4.85
30
20
4.67
24
23
3.56
27
15
5.10
36
19
5.04
24
23
7.03
31
21
5.62
42
11
7.69
22
17
5.75
16
5.50
59
17
5.82
35
14
6.20
24
19
5.54
29
17
6.18
36
15
6.25
24
16
8.42
31
18
7.34
59
11
7.98
35
12
8.26
24
15
7.06
29
12
8.29
36
10
8.07
24
13
10.79
31
14
8.77 10.81
14 13
14 ****
6.91
42
13
9.93
22
7
6.68
15
8.71
42
9
12.67
22
A
8.16
16
6.55
59
14
6.86
35
14
6.79
24
20
7.72
29
14
7.07
36
15
7.27
24
17
8.99
31
16
9.53
14
10
7.22
42
8
11.26
22
16
7.19
16
4.36
59
15
4.59
34
15
4.44
24
20
6.08
28
16
4.81
36
17
4.87
24
21
5.58
31
14
6.39
11
****
4.54
43
6
6.93
22
13
5.07
16
2.11
26
28
2.22
27
9
2.20 1.80
24 10
14 ****
3.1!8
22
14
2.12
28
18
2.59
24
16
2.52
31
24
1.98
43
22
3.60
21
18
2.63
16
2.20
10
****
1.14
16
****
0.78
34
30
1.14
10
0.37
10
****
0.56
26
****
1
7
**** **** **** **** **** **** **** **** **** **** **** ****
30.37
10
32.22
10
32.56
12
33.84
10
33.57 7.92
11 ****
34.09
12
43.33
13
35.50
34.98 9.17
5 ****
52.08
8
35.48 11
**** ****
Annual
***
41.49
****
44.15
****
46
****
Record
Began
Mo/Yr
10/17
8/43
1/56
5/50
8/43
5/56
4/49
5/61
9/37
4/57
2/63
Latest
Data
Ho/Yr
11/79
8/78
10/79
8/78
11/79
10/79
10/79
9/79
10/79
10/79
11/79
* First line of data in the table for each station is mean evaporation in inches; second line
of variation in percent (computed only Where there are 10 years or more of record during
Climatological Data (NOAA-EDIS)
is the number of years of record per month; and third line is the coefficient
1956-1970).
** ***
****
Sum of monthly means.
Insufficient data between 1956-70 to compute the coefficient of variation.
01
0
TABLE I --MEAN MONTHLY, SEASONAL, AND ANNUAL CLASS A PAN EVAPORATION (INCHES)
FOR STATIONS WITH 10 YEARS OR MORE OF RECORD FOR BEST MONTH*
Station Hay-Nov-Other Record Latest
State Index Oct Apr Season Annual Began Data
No. No.** Jan Feb Mar Apr Hay Jun Jul Aug Sep Oct Nov Dac *** *** *** *** Mo/Yr MA>/Yr
~(continued)
Pelton Dam 35 6532 4.71 6.79 8.41 10.21 8.31 5.39 2.59 41.70 ---6/57 5/74
44" 44', 121" 14' 16 16 16 16 15 16 15
14 12 11 8 11 8 13 4
Sullll8r Lake 1 S 35 8173 7.49 8.87 ll.21 9.71 6.58 3.48 47.34 -- -
5/61 10/79
42" 54'. 120" 49' 19 19 19 19 19 19
15 12 10 12 8 15 7
Warm Springs Reservoir 35 9046 5.23 7.63 8.94 12.15 10.66 6.82 3.69 49.89 ---5/27 9/74
43" 34', ll8" 12' 29 47 48 47 48 47 16
**** 17 14 9 12 12 **** ****
Wickiup Dam 35 9316 4 5.66 6.79 8.54 7.05 4.88 2.55 35.47 ---5/41 10/79
43" 41'. 121° 41' 5 39 39 39 39 39 18
**** 12 12 10 13 10 **** ****
PENNSYLVANIA
Bellefonte 4 S 36 530 7 7.15 7.55 6.28 4.84 3 36 ---6/56 9/73
40" 51', 77" 47' 9 10 ll 12 11 5
**** 8 ll ll ll **** ****
Confluence 36 1705 3.74 ·4.80 5.43 5.53 4.63 3.47 1.37 25.23 ---4/49 9/79
39" 48', 79" 22' 30 31 31 31 31 30 26
12 13 8 12 9 12 13 6
Ford City 4 S Dam 36 2942 4.89 5.32 5.85 4.90 3.56 2.29 26.81 ---5/49 10/79
40" 43', 79" 30' 30 31 31 31 31 30
13 9 13 9 14 13 6
Francis E. Walter 36 3018 5.58 5.85 6.37 5.30 3.84 --26.94 -5/63 9/79
41" 07', 75" 44' 16 17 17 17 17
**** **** **** **** ****
Jamestown 2 NW 36 4325 4.29 4.58 5.58 4.70 3.17 2.34 --24.66 -5/42 9/79
41" 3o', so• 28' 23 37 37 37 39 18
14 8 11 12 10 24
Landsville 2 NW 36 4778 5.74 6.61 7.17 5.91 4.31 2.89 32.63 ---5/52 10/79
40" 07', 76" 26' 19 25 27 28 28 20
14 8 ll 12 10 24 5
* First line of data in the table for each station is mean evaporation in inches; second line is the number of years of record per month; and third line is the coefficient
of variation in percent (computed only Where there are 10 years or more of record during 1956-1970).
** Climatological Data (NOAA-EDIS)
*** Sum of monthly means.
**** Insufficient data between 1956-70 to compute the coefficient of variation.
01
RHODE ISLAND
Kingston
41° 29', 71° 32'
SOUTH CAROLINA
Blackville
33• 22', st• 19'
Charleston City
32• 54', so• 02'
Clark Hill Dam
33° 40', 82° 11'
Clemson University
34° 41', 82° 49'
Reinbow Lake
35• o1•, st• 58'
Union 7 SW
34• 39', st• 45'
SOUTH DAKOTA
Angostura Dam
43° 21 ', 103° 26'
Brookings
44° 19', 96° 46'
Cottonwood
43° 58', 101° 52'
Station
State Index
TABLE I --MEAN MONTHLY, SEASONAL, AND ANNUAL CLASS A PAN EVAPORATION (INCHES)
FOR STATIONS WITH 10 YEARS OR MORE OF RECORD FOR BEST MONTH*
May-Nov-
Oct Apr
No. No.** Jan Feb Mar Apr Hay Jun Jul Aug Sep Oct Nov Dec *** ***
Other
Season
***
37 4266
38 764
38 1544
38 1726
38 1770
38 7113
38 8786
39 217
39 1076
39 1972
2.37
12
2.80
13
**** ****
2.58
17
30
1.90
22
20
1.92
25
17
1.68
13
3.22
19
12
2.37
24
13
2.51
25
13
2.17
15
4.44
16
6.02
16
4.91
21
11
6.53
16
5.33
23
11
7,00
16
5.67
23
16
7.09
15
4.95
23
8
6.18
15
3.73
23
11
2.84
22
17
4.74 4.03
16 17
2.75
17
2.25
15
**** **** **** **** **** **** **** **** **** ****
5.27
21
18
3.79
27
14
4.07
30
13
3.58
15
6.54
21
7
5.36
27
12
5.54
31
9
5.22
12
7.20
21
11
6.30
26
11
6.24
31
12
5.83
13
7.24
21
9
7.08
27
9
6.69
31
R
6.48
13
7.54
21
10
6.97
27
7
6.86
31
8
6.67
13
6.59
19
6
6.53
26
15
6.31
30
9
6.13
13
5.3R 4.58
20 21
9 12
5,04
26
9
4.77
29
6
3.83
26
10
3.66
30
12
4.59 3.39
13 13
**** **** **** **** **** **** ****
5.25
15
6.28
14
6.62
14
6.94
15
6.40
15
4.71
15
3.42
15
3.22
21
12
2.48
26
15
2.54
29
14
2.07
15
2.45
17
21
1.87
21
16
1.78
24
13
1.50
13
**** **** **** **** **** **** **** **** **** **** **** ****
6.25
15
16
7.38
21
10
7.86
25
9
7.55
23
13
8.52
22
17
8.56
26
11
8.84
25
22
10.35
21
13
9.34
26
11
10.73
24
12
9.80
22
10
R.73
25
8
10.37
25
18
6.94
22
13
6.15
26
15
8.06
23
32
4.59
19
21
5.34
15
****
27.43
6
35.57 20.63
**** ****
38.53
4
35.75
5
34.53
4
38.31
****
34.37
23.28
8
17.77
8
18.36
16.25
**** ****
47.58
57.14
****
40.64
Record
Annual Began
*** Ho/Yr
4/57
56.20 10/63
****
61.111 2/59
5
53.52 8/52
52.89 1/49
3
5/65
50.62 7/49
****
4/49
4/53
5/53
Latest
Data
Ho/Yr
10/79
12/79
12/79
11/79
11/79
10/77
12/55
9/70
9/79
10/79
* First line of data in the table for each station is mean evaporation in inches; second line is the number of years of record per month; and third line is the coefficient
of variation in percent (computed only whare there are 10 years or more of record during 1956-1970).
** Climatological Data (NOAA-EDIS)
*** Sum of monthly means.
**** Insufficient data between 1956-70 to compute the coefficient of variation,
TABLE I --MEAN MONTHLY, SEASONAL, AND ANNUAL CLASS A PAN EVAPORATION (INCHES)
FOR STATIONS WITH 10 YEARS OR MORE OF RECORD FOR BEST MONTH*
Station Hay-Nov-Other Record Latest
State Index Oct Apr Season Annual Began Data
No. No.** Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec *** *** *** *** Ho/Yr Mo/Yr
SOUTH DAKOTA (continued)
Madison Research Sta 39 5090 5.17 7.86 9.14 9.52 8.23 5.55 3.96 44.26 - - -6/62 10/79
44° 02', 97° 10' 14 18 16 17 18 IR 16
**** **** **** **** **** **** **** ****
Newell 2 NW 39 6054 5.12 7.04 7.86 10.06 9.75 6.48 5.06 46.25 - - -
4/49 10/75
44° 43', 103° 25' 22 25 25 25 25 25 13
22 15 24 14 14 17 **** ****
Oahe Dam 39 6170 5.57 8.79 9.06 ll.05 10.31 7.37 5.04 51.62 - - -
9/60 10/79
44• 27', too• 25' 16 16 19 19 19 20 15
**** **** 14 12 14 16 **** ****
Pactola Dam 39 6427 4.35 5.83 6.49 5.43 4.23 2.72 29.05 - -
-4/55 9/79
44° 04'' 103° 29' 22 23 24 24 23 13
15 22 13 13 18 27 9
Pickstown 39 6574 5.22 7.45 8.34 10.38 9.12 6.00 4.31 45.60 - - -
9/50 10/79
43° 04', 98° 32' 11 26 26 26 26 29 23
**** 15 17 10 8 18 29 8
01 Redfield 6 E 39 7052 7.35 7.56 9.28 8.19 5.96 3.69 42.03 - - -
6/49 4/78
1'\) 44° 53', 98° 23' 25 28 29 29 28 10
16 17 15 10 17 **** ****
Shadehill Dam 39 7567 5.19 7.48 8.20 9.96 9.42 6.51 4.30 45.87 ---8/50 10/76
45° 46', 102° 12' 16 22 23 25 24 26 25
18 16 15 15 13 18 26 9
Sioux Falls WSO 39 7667 8.01 9.10 11.61 8.74 5.96 - -
43.42 -5/65 9/79
43° 34', 96° 44' 15 15 15 15 14
**** **** **** **** ****
TENNE~
Center Hill Dam 40 1569 2.00 2.39 3.80 5.13 6.27 7.07 7.26 6.73 5.57 3.69 2.27 36.59 -- -
1/49 ll/62
36. 06', 85. 49' 10 11 13 21 22 22 22 22 22 22 22
**** **** **** 12 10 9 9 12 15 15 ll 7
Jackson Exp 40 4561 5.94 7.16 7.83 7.84 6.96 5.30 4.33 39.42 ---5/61 10/79
35° 27', 88° 55' 19 19 18 18 18 18 14
**** 10 **** **** **** **** **** ****
Jefferson City 40 4609 1.07 1.49 3.00 4.34 5.22 5.82 6.02 5.32 4.ll 2.74 1.53 1.04 29.23 12.47 -41.70 12/41 12/79
36° 07', 83° 27' 27 28 37 38 38 38 38 38 38 38 36 29
20 32 21 10 13 9 12 9 12 21 13 61 5 12
* First line of data in the table for each station is mean evaporation in inches; second line is the number of years of record per ~nth; and third line is the coefficient
of variation in percent (computed only where there are 10 years or more of record during 1956-1970).
** Climatolosical Data (NOAA-EDIS)
*** Sum of monthly means.
**** Insufficiant data between 1956-70 to compute the coefficient of variation.
01
(1.1
TENNESSEE (continued)
Knoxville
35° 53', 83° 57'
Neptune 3 S
36° 19', 87° 11'
Paris 5 E
36° 19', 88° 41'
Selmer
35° 10', 88° 37'
TEXAS
Austin
30° 18', 97° 42'
Balmorhea
30° 59', 103° 45'
Beeville
28° 27', 97° 42'
Belton Dam
31° 06', 97° 29'
Benbrook Dam
32° 39', 97° 27'
Daingerfield 9 S
32° 55', 94° 43'
Danison Dam
33° 49', 96° 34'
Station
State Index
TABLE I --MEAN MONTHLY, SEASONAL, AND ANNUAL CLASS A PAN EVAPORATION (INCHES)
FOR STATIONS WITH 10 YEARS OR MORE OF RECORD FOR BEST MONTH*
May-Nov-
Oct Apr
No. No.** Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec *** ***
Other
Season
***
40 4946
40 6454
40 6977
40 8160
41 428
41 498
41 639
41 665
41 691
41 2225
41 2394
2.11
21
****
1.36 1.82
15 16
35 25
2.90 3.62
58 62
22 15
3.26
29
36
3.13
17
39
5.43
63
19
5.38 5.93 6.60 6.82 6.31 4.36
12 13 12 13 13 14
**** **** **** **** **** ****
4.69
32
13
4,59
17
7
5.57
34
17
5.33
17
8
6.36
34
9
6.14
17
12
6.66
34
7
6,55
17
15
4.92 5.44 5.99 5.98
10 10 10 10
5.92
34
8
6.19
17
14
4
9
3.41
34
16
3.27
34
11
2.04
30
19
5.00 3.33 2.08
17 17 17
28 14 14
3.97
10
**** **** **** **** **** ****
6,30
63
13
7.29
63
17
8.79
64
14
9.84
63
11
9.76
62
14
7.11 5.69 3.67
63 64 62
18 15 23
1.42
22
****
1.26
16
18
2.81
62
16
31.19
32.74 14.24
10 11
31
****
49.09 24.73
12 10
2.86 3.81 6.55 8.26 9.04 10.16 9.77 9.03 6.93 5.23 3.73 2.87 50.16 28.08
16 16 16 16 16 16 16 16 16 16 15 15
**** **** **** **** **** **** **** **** **** **** **** ****
3.36 3.66
29 30
21 19
2.86 3.68
21 24
24 17
2.82 4.03
20 24
24 19
2.61
17
17
2.71
29
32
3.35
19
11
3.n
36
21
5.13
30
23
5.70
26
21
6.56
26
25
5.60
20
17
5.86
38
27
5.93
31
16
6.40
26
18
7,50
26
16
6.99
20
11
7.15
39
19
6.84
31
19
7.46
26
21
8.63
26
21
8.38
20
11
7.88
39
14
7.75
31
14
9.35
26
16
10.73
26
14
9.33
20
13
8.47
30
18
10.84
27
14
12.56
27
16
10.14
21
13
9.90 10.88
39 39
15 18
8.18
31
15
10.25
26
15
11.53
27
16
9.74
20
13
10.26
39
19
6.30 5.43 4.17
31 31 31
12 13 17
7.61
27
18
5.60 3.52
27 27
19 19
8.56 6.55 4.09
27 27 27
22 18 17
7.07
20
10
7.22
39
25
5.58 3.56
21 21
12 15
5.63 3.92
39 36
19 19
3.57
31
12
2.84
24
20
3.17
23
21
2.1!2
21
19
2.61
33
21
**** ****
42.97 25.82
9 12
51.11 "25.00
12 12
58.56 28.17
13 10
50.24 24.93
6 5
51.77 25.78
14 ****
35.40
Record
Annual Began
*** Mo/Yr
5/66
10/36
46.98 1/49
9
9/62
73.82 4/16
11
71!.24 2/40
****
68.79 1/49
10
76.11 7/53
12
86.73 7/53
6
75.17 7/59
4
77.55 10/40
****
Latest
Data
Mo/Yr
10/79
11/48
11/65
7/72
12/79
12/55
12/79
12/79
11/79
12/79
12/79
* Firat line of data in the table for each station is mean evaporation in inches; second line is the number of years of record per month; and third line is the coefficient
of variation in percent (computed only Where there are 10 years or more of record during 1956-1970) •.
** Climatological Data (NOAA-EDIS)
*** Sum of monthly means.
**** Insufficient data between 1956-70 to compute the coefficient of variation.
01
~
TEXAS (continued)
Dilley
zs• 40', 99• to•
Fort Stockton 2 NE
3o• 52', 102• 54'
Grand Falls
31• 48', toz• 50'
Grapevine Dam
32° 58', 97° 03'
Hords Creek Dam
31° 51', 99° 34'
Lavon
33° 02', 96° 29'
Mansfield Dam
32° 34', 97° 09'
McCook
29° 30'. 98° 23'
Mount Locke
3o• 40', 104• oo•
Navarro Mills Dam
31° 57', 96° 42'
Point Comfort
zs• 40', 96° 33'
Station
State Index
TABLE I --MEAN MONTHLY, SEASONAL, AND ANNUAL CLASS A PAN EVAPORATION (INCHES)
FOR STATIONS WITH 10 YEARS OR MORE OF RECORD FOR BEST MONTH*
May-Nov-
Oct Apr
No. No.** Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec *** ***
Other
Season
***
41 2458
41 3280
41 3680
41 3691
41 4278
41 5094
41 5561
41 5721
41 6104
41 6210
41 7140
2.93
49
21
4.03
20
3.74
51
23
5.14
19
6.26
51
19
9.26
13
7.64
51
17
10.81!
20
8.73
51
19
12.28
20
10.09
51
15
14.27
19
10.81
51
11
13.77
20
10.19
51
11
12.47
20
7.42
50
18
9.22
18
5.54 3.65
50 50
22 24
7.20 5.04
17 18
2.72
49
23
4.21
17
**** **** **** **** **** **** **** **** **** **** **** ****
3.39 5.02 9.19 ll.41
10 11 11 11
13
9
14
9
14
9
13
8
9
9
7.13 4.73
10 10
3
9
**** **** **** **** **** **** **** **** **** **** **** ****
3.17
18
25
4.12
17
27
2.83
18
28
2.71
15
3.97
23
13
5.18
22
24
4.03
23
16
3.44
14
6.56
25
24
8.10
26
25
6.25
25
25
5.20
15
7.51
26
16
9.60
26
13
7.35
26
15
6.32
14
8.70
26
16
10.24
26
18
7.23
26
14
7.16
15
10.65
24
13
12.19
26
14
10.21!
26
9
8.56
20
12.29
26
17
13.51
27
15
11.54
27
16
10.66
14
11.42
27
16
12.27
27
11
10.58
27
15
10.26
11!
8.31
27
20
9.23
27
19
8.05
27
18
7.40
18
6.48
27
18
4.17
27
18
7.32 4.1!7
26 25
16 20
6.33 4.13
27 25
14 19
5.45
14
3.65
18
3.24
23
20
4.10
23
23
3.05
20
21
2.90
14
**** **** **** **** **** **** **** **** **** **** **** ****
4.18
17
5.07
17
8.01
17
8.86
16
9.18
17
10.43
17
11.97
17
11.69
17
8.94
17
7.37
17
5.70
16
4.53
17
**** **** **** **** **** **** **** **** **** **** **** ****
3.96
11
4.43
10
6.89
10
8.15
11
8.60
11
8.74
11
6.98
10
6.61
11
5.80
11
5.33
12
3.96
10
4
7
**** **** **** **** **** **** **** **** **** **** **** ****
3
9
4.09
14
6.42
16
7.33
17
8.31
16
10.06
17
11.68
17
10.77
16
7.69
16
6.42
17
4.17
17
3.09
13
**** **** **** **** **** **** **** **** **** **** **** ****
3.08
18
17
3.85
21
11
5.53
22
10
6.51
22
12
8.53
22
11
9.92
22
10
10.76
22
10
9.88
22
15
7.46
22
10
6.46
22
10
4.37
22
12
3.40
23
13
52.78 26.94
10 14
69.21 38.56
**** ****
37 70
**** ****
57.85 21!.62
13 13
64.76 35.97
10 11
54.01 27.64
11 12
49.49 24.22
**** ****
59.58 36.35
**** ****
42.06 31
**** ****
54.93 28
**** ****
53.01 26.74
6 5
Record
Annual Began
*** Ho/Yr
79.72 6/28
11
107.77 5/40
****
107 2/40
****
86.47 8/53
11
100.73 7/53
8
81.65 7/53
11
73.71 1/49
****
95.93 1/63
****
73 8/68
****
83 3/63
****
79.75 11/57
Latest
Data
Ho/Yr
12/79
3/61
7/54
11/79
10/79
10/79
6/64
12/79
12/79
11/79
12/79
* First line of data in the table for each station is mean evaporation in inches; second line is the number of years of record per month; and third line is the coefficient
of variation in percent (computed only where there are 10 years or more of record during 1956-1970). ** Climatological Data (NOAA-EDIS) *** Sum of monthly means. **** Insufficient data between 1956-70 to compute the coefficient of variation.
01
01
~ (continued)
Proctor Res
31• 58', 98° 30'
Red Bluff Dam
31 • 54 •, too• 29 •
Rio Grande City 3 W
26• 23', 98° 52'
Sam Rayburn Dam
31° 04', 94° 06'
Sommerville Dam
30° 20', 96° 32'
Spur 1 WNW
33 • 29 •, too• 53 •
Stillhouse Hollow Dam
31° 02', 97° 32'
Thompson's 3 WSW
29• 29', 95• 38'
Waco Dam
31° 26', 97° 13'
Weslaco 2 E
26° 09', 97° 58'
Whitney Dam
31° 51', 97° 22'
Station
State Index
TABLE I --MEAN MONTHLY, SEASONAL, AND ANNUAL CLASS A PAN EVAPORATION (INCHES)
FOR STATIONS WITH 10 YEARS OR MORE OF RECORD FOR BEST MONTH*
May-
Oct
Nov-
Apr
No. No.** Jan Feb Mar Apr Hay Jun Jul Aug Sep Oct Nov Dec *** ***
Other
Season
***
41 7300
41 7481
41 7622
41 7936
41 8446
41 8566
41 8646
41 9014
41 9417
41 9588
41 9715
3.87
12
6.00
10
7.47
15
8.66
16
9.18
16
11.37
17
12.90
17
11.26
17
7.82
17
6.49 4.42
17 14
3.67
13
**** **** **** **** **** **** **** **** **** **** **** ****
3.80
32
29
5.17
36
15
3.22 4.34
17 17
8.63
37
19
6.58
17
11.47
35
10
8.14
16
13.63
34
H
14.58
34
9
8.56 10.08
17 16
14.01
34
12
12.54
35
13
11.31 11.11
18 17
9.50
33
12
7. 76
17
6.59
35
15
4.49
35
20
6.07 4.03
17 18
3.62
32
23
3.09
17
**** **** **** **** **** **** **** **** **** **** **** ****
3
8
4
9
5.21
12
6.27
12
7.31
12
8.09
12
8.32
12
7.78
12
6.06 5.35
12 12
3.92
12
3
9
**** **** **** **** **** **** **** **** **** **** **** ****
2. 74
12
3.56
13
5.36
15
6.09
14
7.18
15
8.88
14
9.98
15
8.99
15
6.57
15
5.49
15
3.83
15
2.73
13
**** **** **** **** **** **** **** **** **** **** **** ****
59.02 34.09
**** ****
70.85 37.18
HJ
53.22 29.40
**** ****
42.91 25
**** ****
47.09 24.31
**** ****
2.67 3.39 5.76 7.13 8.12
36
9.40 9.84 8.97
35
6.80 5.20 3.58 2.68 48.33 25.21
33 37 37 36 36 35 36 36 35 32
**** **** **** **** **** **** **** **** **** **** **** ****
3.18 4.08
11 12
5.95
15
6.98
15
7.57
15
9.71
15
11.32
15
10.17
15
7.08 5.97
15 15
4.07
14
3.00
13
**** **** **** **** **** **** **** **** **** **** **** ****
2.87
16
19
3
7
3.74
22
12
4.28
12
4.89
22
11
6.43
13
5. 79
22
9
7.30
15
7.26
22
11
8.02
15
7.80
22
12
10.40
15
7.76
23
9
12.09
15
7.26
23
11
11.08
15
5.92
23
9
8.03
15
5.25
23
13
6.52
15
4.24
21
12
4.46
14
2.96
22
44
3.35
11
**** **** **** **** **** **** **** **** **** **** **** ****
3.41
30
19
2.95
21
30
3.99
30
18
3.88
24
20
6.06
30
17
6.05
26
25
7.51
29
14
7.20
26
15
8.42
30
10
8.46
26
20
9.18
30
7
10.65
26
13
10.35
30
10
12.39
27
15
9.54
30
12
11.38
27
12
7.55
29
14
8.33
27
17
6.00
29
18
6.24
27
16
4.34
27
16
4.02
27
16
3.33
28
20
3.12
25
21
**** ****
51.82 27.26
**** ****
41.25 24.49
56.14 29
**** ****
51.04 28.64
8 10
57.45 27.22
10 13
Record
Annual Began
*** Mo/Yr
93.11 6/63
****
108.03 11/39
82.62 7/62
****
68 1/68
****
71.40 1/65
****
73.54 1/22
****
79.08 1/58
****
65.74 7/57
85 3/65
****
79.68 1/49
8
84.67 7/53
10
Latest
Data
Mo/Yr
10/79
10/79
12/79
11/79
12/79
3/64
12/79
12/79
11/79
12/79
12/75
* ~-~ line of data in the table for each station is mean evaporation in inches; second line
. -~ variation in percent (computed only where there are 10 years or more of record during
Climatological Data (NOAA-EDIS).
is the number of years of record per month; and third line is the coefficient
1956-1970);
** ***
****
Sum of monthly means.
Insufficient data between 1956-70 to compute the coefficient of variation.
TABLE I--MEAN MONTHLY, SEASONAL, AND ANNUAL CLASS A PAN EVAPORATION (INCHES)
FOR STATIONS WITH 10 YEARS OR MORE OF RECORD FOR BEST MONTH*
Station May-Nov-Other Record Latest
State Index Oct Apr Season Annual Be ~tan Data
No. No.** Jan Feb Mar Apr May Jun Jul Au~t Sep Oct Nov Dee *** *** *** *** Mo/Yr Mo/Yr
~ (continued)
Winter Haven Exp Station 41 9842 2.81 3.68 5.67 7.30 10 12 12.67 12 8.22 5.92 3.79 2.83 61 26.08 -87 3/49 3/64
28° 38', 99° 52' 11 12 12 10 9 9 10 9 10 11 10 9
**** **** **** **** **** **** **** **** **** **** **** **** **** **** ****
Ysletta 41 9996 3.57 5.04 8.43 11.40 13.49 14.79 13.04 11.13 9.09 6.68 4.36 3.32 68.22 36.12 -104.34 2/39 12/79
31° 42', 106° 19' 40 41 41 41 41 41 41 41 41 41 39 40
17 9 16 5 6 5 9 27 9 12 14 12 6 6 4
UTAH
Fish Springs Refuge 42 2852 11.48 13.34 16.00 13.75 10.10 6 71 ---1/62 9/79
39° 51', 113° 24' 10 13 13 12 13 6
**** **** **** **** **** **** ****
Flaming Gorge 42 2864 5.89 10.07 8.52 5.92 - -
30.40 -5/58 9/79
40° 56', 109" 25' 20 21 20 18
20 9 10 18
Green River Aviation 42 3418 6.31 7.94 8.59 9.18 7.90 5.88 3.71 43.20 --4/56 10/79
01 39" oo•, 11o• 10' 16 20 23 21 22 23 17
(1) **** 17 16 12 14 16 20 9
Gunnison 42 3514 7.40 8.53 9.91 8.45 6.09 4 44 ---5/62 9/79
39° 09', 111" 49' 12 15 15 16 16 9
**** **** **** **** **** **** ****
Logan Utah State Exp Sta 42 5190 4.27 6.21 7.24 8.61 7.62 5.14 3.05 37.87 - --9/50 8/78
41° 46', 111° 49' 14 27 28 28 28 27 25
**** 15 12 7 8 12 13 5
Moab 4 NW 42 5733 7.64 10.46 12.06 12.91 10.90 7.69 20.00 74.02 - - -3/58 10/79
38° 36', 109" 36' 19 22 20 21 22 22 20
13 9 14 12 10 11 20 8
Mexican Hat 42 5582 8.80 12.02 14.35 14.65 12.04 9.10 5.71 2 67.87 ---11/57 10/79
37° 09', 109° 52' 19 20 19 19 20 20 17 5
12 11 15 14 34 34 13 **** 17
Moon Lake 42 5815 8.09 6.82 6 - -
21 -8/41 9/55
40° 34', 110° 30' 14 14 7
**** **** ****
Piute Dam 42 6897 8.97 10.84 10.59 9.11 7.41 4.91 51.83 -- -
5/18 10/70
38" 19', 112° 11' 52 51 51 51 51 43
12 11 10 17 14 16 6
* First line of data in the table for each station is mean evaporation in inches; second line is the number of years of record ,per month; and third line is the coefficient
of variation in percent (computed only where there are 10 years or more of record during 1956-1970).
** Climatolosical Data (NOAA-EDIS)
*** Sum of monthly means.
**** Insufficient data between 1956-70 to compute the coefficient of variation.
TABLE I --MEAN MONTHLY, SEASONAL, AND ANNUAL CLASS A PAN EVAPORATION (INCHES)
FOR STATIONS WITH 10 YEARS OR MORE OF RECORD FOR BEST MONTH*
Station May-Nov-Other Record Latest
State Index Oct Apr Season Annual Began Data
No. No.** Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec *** *** *** *** Mo/Yr Mo/Yr
UTAH (continued)
Provo Dam 42 7068 6.82 6.30 7.37 7.83 6.85 4.94 2.88 36.17 ---5/18 9/60
40° 13', 111" 18' 11 16 17 17 17 17 17
**** **** **** **** **** **** **** ****
Saltair Salt Plant 42 7578 6.70 9.50 12.26 14.71 12.87 8.86 12.37 2 70.57 ---3/56 10/79
40" 46'. 112""06' 22 24 24 24 24 24 21 6
17 14 19 8 7 9 21 **** 7
Strawberry Reservoir 42 8376 6 7.43 8.00 7.30 5.20 3.35 37 ---6/56 8/77
40° 10', 111" 11' 6 14 18 lfl 18 12
**** **** 11 14 14 **** ****
Utah Lake, LEHI 42 8973 3.11 5.57 8.11 9.60 10.59 9.23 6.76 3.95 1.38 48.24 ---5/23 10/79
40° 22'. 111" 54' 42 54 59 60 60 60 60 55 39
26 30 14 16 7 11 10 13 **** 8
Wanship Dam 42 9165 7 6.89 7.56 5.64 4.84 3 35 ---6/56 6/74
40° 47', 111" 24" 9 19 18 18 18 7
**** 15 11 18 21 **** ****
01
~ VERMONT
Essex Junction 43 2843 4.92 5.67 6.46 5.00 3.43 2.29 27.77 ---6/63 9/79
44" 31', 73" 07' 16 17 16 17 17 12
**** **** **** **** **** **** ****
VIRGINIA
Charlottesville 1W 44 1598 6.13 6.86 6.97 5.84 4.53 3.38 33.71 ---8/51 8/66·
38" 02', 78" 31' 12 14 14 15 15 13
11 11 13 11 13 17 8
Holland 1E 44 4044 6.16 7.05 7.58 7.61 6.72 5.14 3.95 38.05 ---5/50 4/78
36" 41', 76" 47' 21 28 28 28 27 27 27
14 7 6 15 10 13 12 5
John H. Kerr Dam 44 4414 5.27 6.22 6.81 7.20 6.12 4.87 3.37 34.59 ---10/53 9/79
36" 36', 78" 17' 19 23 25 24 22 24 13
15 9 13 12 11 11 19 ****
Mari·on Evap Station 44 5271 4.64 4.98 5.25 5.21 4.98 3.61 2.76 26.79 ---4/71 10/79
36" 49', 81" 31' 9 9 9 9 9 9 9
14 37 8 8 10 9 34 ****
* First line of data in the table for each station is mean evaporation in inches; second line is the number of years of record per month; and third line is the coefficient
of variation in percent (computed only where there are 10 years or more of record during 1956-1970).
** Climatolo~ical Data (NOAA-EDIS)
*** Sum of monthly means.
**** Insufficient data between 1956-70 to compute the coefficient of variation.
TABLE I --MEAN MONTHLY, SEASONAL, AND ANNUAL CLASS A PAN EVAPORATION (INCHES)
FOR STATIONS WITH 10 YEARS OR MORE OF RECORD FOR BEST MONTH*
Station May-Nov-Other Record Latest
State Index Oct Apr Season Annual Began Data
No. No.** Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec *** *** *** *** Mo/Yr Mo/Yr
VIRGINIA (continued)
Philpot Dam 2 44 6692 4.34 4.83 5.02 5.30 5.08 3.82 2.72 26.77 -- -
9/53 10/79
36° 47', so• 02' 25 25 25 25 25 26 26
19 10 9 12 10 13 14 5
Sterling Test Lab 44 8084 5.03 6.53 7.34 7.53 7.10 5.011 33.58 - --5/61 10/70
38 O 59 I 0 77 O 29 I 9 10 10 10 10 10
22 10 7 12 11 10 ****
WASHINGTON
Bumping Lake 45 969 4.42 5.92 5.17 3.31 --18.82 -6/49 9/66
46° 52', 121° 18' 16 18 18 14
12 11 28 ****
Eltopia 45 2540 5.43 6.61 7.74 9.03 7.41 4.00 2.41 38.10 -- -
7/54 10/79
46° 24', 119° 10' 19 24 23 23 26 25 21
15 12 10 12 17 23 26 12
Lake Kachess 45 4406 4.00 4.85 6.45 5.18 2.99 1.35 24.82 ---9/17 9/68
01 47" 16', 121° 12' 43 52 52 52 51 33
(X) 22 13 16 18 18 **** ****
Lind 3 NE 45 4679 5.77 8.08 9.118 12.58 10.62 7.19 --54.12 -4/49 9/79
47" oo•, us• 35' 31 31 . 31 31 30 30
14 12 11 9 14 13
Moses Lake 3 E 45 5613 5.88 7.77 8.91 10.32 8.28 5.57 3 44 ---4/49 8/66
47° 07', 119° 12' 17 16 18 18 111 16 9
19 **** 16 17 111 21 **** ****
Othello 5 E 45 6215 5.60 7.73 9.29 11.30 9.51 6.45 3.25 47.53 ---4/41 7/78
46° 48', 119° 03' 36 37 38 37 37 37 28
17 12 II 9 11 10 15
Puyallup 2 W Exp Sta 45 6803 2.45 3.91 4.69 5.66 4.63 2.73 1.24 0.60 22.86 ---3/61 11/79
47° 12', 122° 20' 18 18 19 19 19 19 18 14
14 13 15 12 18 17 9 **** 10
Quincy 45 6880 5.95 8.00 9.13 10.73 8.96 5.83 3.00 45.65 ---4/41 8/78
47° 13', 119° 51' 35 38 38 37 38 37 28
15 13 10 9 12 17 16 6
Rimrock Teton Dsm 45 7038 5.45 6.65 8.10 7.44 3.87 1.69 33.20 -- -
5/49 9/77
46° 39', 121° 08' 29 29 29 29 29 18
14 12 13 16 13 16 10
* First line of data in the table for each station is mean evaporation in inches; second line is the number of years of record per month; and third line is the coefficient
of variation in percent (computed only where there are 10 years or more of record during 1956-1970).
** Climatolo~ical Data (NOAA-EDIS)
*** Sum of monthly means.
**** Insufficient data between 1956-70 to compute the coefficient of variation.
0'1
<0
TABLE I --MEAN MONTHLY, SEASONAL, AND ANNUAL CLASS A PAN EVAPORATION (INCHES)
FOR STATIONS WITH 10 YEARS OR MORE OF RECORD FOR BEST MONTH*
Station May-Nov-Other Record Latest
State Index Oct Apr Season Annual Began Data
No, No,** Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec *** *** *** *** Mo/Yr Mo/Yr
WASHINGTON (continued)
Seattle Maple Leaf 45 7463 1.88 3.26 4.61 5.10 6.76 5.25 3.51 1.70 26.93 ---5/41 10/70
47" 42'. 122° 19' 13 17 17 17 17 18 18 16
**** **** **** **** **** **** **** **** ****
Spokane WBAP 45 7938 4.85 7.47 9.ll ll.90 10."66 6.34 - -50.33 -5/66 9/79
47° 38', ll7° 32' 12 14 14 14 14 14
**** **** **** **** **** ****
Walla Walla 3 W 45 8931 2.57 4.42 6.23 '7 .67 10.41 8.92 5.19 2.54 40.96 ---6/16 9/62
46. 02', us• 20' 23 42 45 45 46 45 46 45
**** **** **** **** **** **** **** **** ****
Whitman Missioo 45 9200 4.82 6.95 8.86 10.88 9.39 5.82 2.96 44.86 ---4/63 10/75
46° 03', 118° 27' 16 17 17 17 16 17 14
**** **** **** **** **** **** **** ****
WEST VIRGINIA
Bluestone Dam 46 939 3.95 4.91 5.43 5.78 4.94 3.76 2.53 1.38 27.35 ---10/52 10/79
37• 39', so• 53' 27 27 27 27 26 27 27 12
18 26 7 9 10 13 16 17 8
Hogsett Gallipolis Dam 46 4200 5.72 6.22 6.47 5.74 4.54 3.24 31.93 ---6/49 9/72
38" 41', s2• 11' 10 20 21 22 23 21
**** 8 ll 8 17 20 ****
Kearneysville 46 4763 5 5.60 5.81 6.87 6.00 4.40 3.08 31.76 ---4/65 10/79
39• 23', n• 53' 9 14 13 14 14 13 ll
**** **** **** **** **** **** **** ****
Parsons 46 6867 4 5.03 5.48 5.60 4.94 3.72 2.59 27.36 ---5/65 9/79
39° 06', 79° 40' 7 14 14 13 13 13 12
**** **** **** **** **** **** **** ****
Sutton Reservoir 46 8662 5.07 5.57 5.75 5.23 3.96 3 26 ---8/61 9/78
3a• 39', so• 41' 12 17 16 17 16 7
**** **** **** 10 9 **** ****
Wardensville 46 9281 4.74 5.24 5.94 6.47 7.21 4.42 3.15 32.43 ---8/39 9/79
39° 26', 78° 35' 26 38 39 39 40 40 36
16 ll 6 10 9 13 12 6
* First line of data in the table for each station is mean evaporation in inches; second line
of variation in percent (computed only where there are 10 years or more of record during
Climatological Data (NOAA-EDIS)
is the number of years of record per month; and third line is the coefficient
1956-1970).
**
***
****
Sum of monthly means.
Insufficient data between 1956-70 to compute the coefficient of variation,
TABLE I --MEAN MONTHLY, SEASONAL, AND ANNUAL CLASS A PAN EVAPORATION (INCHES)
FOR STATIONS WITH 10 YEARS OR MORE OF RECORD FOR BEST MONTH*
Station Hay-Nov-other Record Latest
State Index Oct Apr Season Annual Began Data
No. No.** Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec *** *** *** *** Mo/Yr Mo/Yr
WISCONSIN
Arlington University Farm 47 308 7 7.50 8.17 6.77 4.81 3.21 37.46 ---6/65 10/79
43° 18', 89° 21' 7 14 14 15 15 14
**** **** **** **** **** **** ****
Marshfield Exp Sta 47 5120 5.97 6.46 6.91! 6.15 4.35 3.16 33.07 ---6/39 9/79
44° 39', 90° 08' 29 39 40 39 41 26
11 13 12 11 13 15 ****
Rainbow Reservoir 47 6939 4.76 5.19 5.49 4.54 2.92 2.12 25.02 ---5/49 9/79
45" 50', 89° 33' 20 28 30 30 29 11
**** 34 10 7 9 **** ****
Trempealeau Dam 6# 47 8589 6.01 6.64 7.03 5.88 4.32 3.48 33.36 - - -
5/41 9/79
44° 00', 91" 26' 36 39 39 39 38 28
11 15 10 8 7 15 6
~
0> Anchor Dam 48 228 7.10 8.53 9.67 8.46 6.07 - -
39.83 -4/61 9/79
0 43" 40', I08° 50' 14 I7 17 Ill 15
**** **** 11 13 ****
Archer 48 270 5 3.40 7.52 8.66 8.31 6.20 5 39 -- -
5/58 I0/75
41° 09', 104° 39' 8 23 23 24 24 24 8
**** 17 14 17 10 14 **** ****
Boysen Dam 48 1000 7.38 8.69 10.53 9.50 6.23 3.72 46.05 ---4/49 8/79
43" 25', 108° 11' 23 31 31 31 30 12
12 14 10 8 17 **** ****
Farson 48 3170 7.91 9.75 11.00 9.12 6.76 - -
44.54 -6/50 9/73
42° 07'' 109° 27' 14 20 20 22 21
13 18 IO 12 19 ****
Gillette 48 3855 4.6I 6.78 7. 72 9.75 9.69 6.35 2.I6 42.45 ---6/58 10/79
44° 17', 105° 28' 10 17 17 I7 17 I7 15
**** **** **'*:* **** **** **** **** ****
Green River 48 4065 9.14 10.22 I2.22 I0.53 7.36 --49.47 -6/58 9/79
41" 32', 109° 28' 13 15 I7 15 15
I5 14 5 32 IS
Heart Mountain 48 4411 6.55 7.I8 8.43 7.45 5.10 3.79 38.50 ---6/50 9/79
44° 41 '' 108° 57' 25 29 28 30 28 20
14 25 14 I5 21 21 15
* First line of data in the table for each station is mean evaporation in inches; second line is the number of years of record per month; and third line is the coefficient
of variation in percent (computed only where there are 10 years or more of record during I956-1970).
** Cliaatolo&ical Data (NOAA-EDIS)
*** Sum of monthly means.
**** Insufficient data between I956-70 to compute the coefficient of variation.
0>
TABLE I --MEAN MONTHLY, SEASONAL, AND ANNUAL CLASS A PAN EVAPORATION (INCHES)
FOR STATIONS WITH 10 YEARS OR MORE OF RECORD FOR BEST MONTH*
Station M11y-Nov-Other Record Latest
State Index Oct Apr Season Annual Began Data
No. No.** Jan Feb Mar Apr May Jun Jul AU!! Sep Oct Nov Dec *** *** *** *** Mo/Yr Mo/Yr
WYOMING· (continued)
Laramie 2 NW 48 5435 8.96 10.23 ll.02 9.73 7.65 5 53 ---5/66 9/79
41" 21', 105° 37' 9 12 13 13 12 5
**** **** **** **** **** **** ****
Morton 1 NW 48 6470 6.10 7.07 9.88 7.57 5.17 --35.79 -5/51 9/68
43" 13'. 108° 48' 14 17 17 17 17
**** 21 8 5 18
Pathfinder Dam 48 7105 5.45 6.94 8.62 10.54 9.69 7.33 5.44 48.56 ---5/49 8/79
42" 28', 106" 51' 15 26 28 30 30 29 25
**** 19 11 14 12 16 19 ****
Sheridan Field Station 48 8160 6.21 7.67 9.82 9.44 6.29 --39.43 -5/49 9/79
44° 50', 106" 50' 24 29 29 29 27
16 20 15 13 17
Whalen Dam 48 9604 5.99 7.85 9.06 10.63 9.53 6.61 4.81 48.49 ---4/49 10/79
42° 15', 104" 38' 17 31 31 30 31 31 22
**** 16 16 11 9 13 **** ****
* First line of data in the table for each station is mean evaporation in inches; second line
of variation in percent (computed only where there are 10 years or more of record durinv,
Climatological Data (NOAA-EDIS)
is the number of years of record per month; and third line is the coefficient
1956-1970).
** ***
****
Sum of monthly means.
Insufficient data between 1956-70 to compute the coefficient of variation.
en
N
ALABAMA
Birmingham WB Airport
33" 34', 86" 45'
Mobile WB Airport
30" 40', 88" 15'
Montgomery WB Airport
32° 18', 86" 23'
~
Flagstaff WB Airport
35" 7', lll", 40'
Phoenix WB Airport
33" 25', 112" l'
Tucson WB Airport
32" 7', 110" 55'
Winslow WB Airport
35" 1', 110° 43'
Yuma WB Airport
32" 40', 114" 36'
~
Ft Smith Water PL
35° 38', 94" 8'
Little Rock WB Airport
34° 43', 92° 13'
TAILE II --MONTHLY MEANS OF ESTIMATED "PAN EVAPORATION" COMPUTED FROM METEOROLOGICAL
MEASUREMENTS USING A FORM OF THE PENMAN EQUATION*
Station
State Index
No. No.** JM Feb Mar Apr May Jun Jul AUJ! Sep Oct
2
2
2
2
2
3
3
831
5478
5550
l. 79
15
18
2.70
14
16
2.09
15
16
2.40
15
14
3.28
15
ll
2.76
15
8
4.06
15
17
4.86
15
7
4.37
15
13
5.86
15
7
5.84
15
7
5.71
15
8
7.23
15
14
7.19
15
12
7.10
15
12
7.14
15
ll
7.16
15
13
7.12
15
12
7.13
15
18
6.50
15
12
7.42
15
8
6.68
15
14
6.29
15
ll
6.94
15
12
5.45
15
l3
5.66
15
12
5.77
14
12
3.93
15
17
5.20
14
13
4.08
15
12
3010 2 2 3 5 7 9 8 6 5 4
6481
8820
9439
9660
2578
4248
9 9 9 9 9 9 9 9 9 9
**** **** **** **** **** **** **** **** **** ****
3.60
15
16
4.64
15
12
1.99
15
37
5.24
15
12
1.84
15
19
1.92
15
17
4.36
15
18
5.15
15
12
3.07
15
18
5. 73
15
12
2.15
15
ll
2.40
15
12
7.00
15
14
9.98
15
ll
7.72 10.85
15 15
17 10
13.31
15
ll
13.77
15
8
5.50
15
13
8.08 10.93
15 15
8 8
8.49 11.36 14.27
15 15 15
10 8 3
3.74
15
20
4.18
15
25
5.46
15
12
5. 51
15
18
6.61
15
ll
6.94
15
ll
14.83
15
5
15.21
15
5
14.55 12.66
15 15
5 7
13.08 ll. 52
15 15
6 ll
13.05 11.86 10.14
15
10
15 15
5 10
15.55 15.85
15 15
5 5
7.18
15
10
7.97
15
7
8.01
15
12
8.03
15
8
14.33
15
5
7.70
15
12
7.20
15
l3
10.53
15
7
10.74
14
10
8. 7l
15
ll
11.86
15
10
5.46
15
18
5.52
15
Ill
7.77
15
ll
8.69
15
ll
6.08
15
ll
8.87
15
5
4.05
15
19
4.15
15
13
Nov
2.60
15
7
3.61
15
8
2.82
15
7
2.51
10
16
4.79
15
12
5. 70
15
ll
3.36
15
12
5.89
14
12
2.55
15
16
2.63
15
12
Dec
1.90
15
12
2.87
15
ll
2.26
15
8
1.66
10
19
3.51
15
14
4.38
15
16
1.92
15
31
4.82
15
17
1.85
15
ll
1.97
15
12
Record
!fay-Nev-Began
Oct*** A~r*** Annual*** Mo/Yr
37.57 18.60 56.18 l/56
8 5 6
38.05 23.19 60.91 l/56
6 5 5
38.61 20.01 58.70 l/56
6 5 5
39 15 54 ll/61
**** **** ****
73.66 33.24 106.90 l/56
5 8 5
72.94 38.44 lll. 45 l/56
3 5 3
60.77 23.92 84.68 l/56
5 6 5
80.73 41.64 122.45 l/56
3 6 5
39.03 17.59 56.61 l/56
8 7 7
39.81 18.61 58.42 l/56
3 7 3
Last
Data
Mo/Yr
12/70
12/70
12/70
12/70
12/70
12/70
12/70
12/70
12/70
12/70
* First line of data in the table for each station is mean evaporation in inches; second line is the number of years of record per month; and third line is the coefficient
of variation in percent (computed only when there are 10 years or more of record during 1956-1970).
** Climatological Data (NOAA-EDIS)
*** Sum of monthly means.
**** Insufficient data between 1956-70 to compute the coefficient of variation.
en
(1.1
CALIFORNIA
Bakersfield WB Airport
35° 25', 119" 3'
Burbank Valley Pump
34° 10', 118° 21'
Fresno WB Airport
36° 46'. 119° 4)'
Long Beach WB Airport
33° 49', 118" 8'
Los Angeles WB Airport
33° 55', 118" 22'
Oakland WB Airport
37° 43', 122" 11'
Red Bluff WB Airport
40° 8', 122" 15'
Sacramento WB Airport
38" 31'. 121. 30
San Diego WB Airport
32" 43', 117" 10'
San Francisco WB Airport
37° 37', 122° 22'
~
Colorado Springs WSO
38° 49', 104° 43'
State
No.
4
4
4
4
4
4
4
4
4
4
5
Station
Index
No.**
442
1194
3257
5085
5114
6335
7292
7630
7740
7769
1778
TABLE II --MONTHLY MEANS OF ESTIMATED "PAN EVAPORATION" COMPUTED FROM METEOROLOGICAL
MEASUREMENTS USING A FORH OF THE PENMAN EQUATION*
May-Nov-
Jan Feb Mar Apr May Jun Jul Au~ Sep Oct Nov Dec Oct*** Apr*** Annual***
1.96
15
29
3.52
10
24
1.30
15
22
3.41
ll
13
3.54
15
19
1. 75
15
19
2.51
15
68
1.26
15
29
3.19
15
16
1.65
15
19
2.38
15
18
2.61
15
23
3.57
10
30
2.06
15
19
3.45
11
22
3.63
14
24
2.26
15
25
2.94
15
26
2.15
15
25
3.35
15
16
2.40
15
24
2.52
15
20
4.68
15
16
4.81
10
16
4.22
15
12
4.48
11
12
5.10
15
12
3.76
15
12
4.52
15
17
3. 73
15
17
4.74
15
11
3.81
15
17
3.76
15
26
6.66
15
18
5.67
10
16
6.28
15
17
5.68
11
12
5. 77
15
13
4.75
15
12
6.91
14
23
5.85
15
19
6.09
15
11
5.30
15
12
5.86
15
18
9.73
15
12
6.25
10
13
9.33
15
10
6.22
ll
10
6.65
14
10
5.69
14
10
9.57
15
12
8.31
15
10
6.37
15
8
6.40
15
16
7.91
15
12
12.26
15
5
7.30
10
12
11.41
15
6
6.15
11
11
6.36
15
14
6.43
15
l3
13.48 12.05
15 15
5 7
9.16
10
8
8.32
10
6
12.39 10.74
15 15
7 6
8.10
11
7
7.82
15
7
6.43
15
8
7.99
11
10
7.29
15
6
5.98
15
6
12.65 13.46 11.79
15
7
14 15
11 5
10.73 11.31
15 15
8 5
5.57
15
12
7.08
15
11
9.36
15
13
6.81
15
5
6.70
15
11
9.52
15
10
10.10
15
5
6.72
15
8
6.64
15
12
8.59
15
11
9.13
15
8
7.12
10
12
7.85
15
6
6.38
11
10
6.07
15
14
5.37
15
11
9.14
15
7
7.68
15
5
5.79
15
8
5.94
15
16
6.69
15
12
6.19
15
17
5.41
10
19
5.04
15
11
5.24
11
18
5.27
14
30
3.97
15
l3
6.24
15
17
5.02
14
18
4.86
15
14
4.40
15
17
5.14
15
19
3.20
15
24
4.04
10
l3
2.34
15
25
3.50
11
17
3.96
15
22
2.38
15
17
3.24
15
26
2.32
15
27
3.78
15
19
2.43
15
17
3.02
15
18
1. 75
15
32
3.63
10
17
1. 21
14
37
2.98
11
18
3.55
15
18
1.83
15
24
2.25
14
31
1.22
15
43
3.27
15
16
1.70
15
25
2.43
15
17
62.84
5
43.56
5
56.74
5
40.07
6
39.87
7
33.96
5
62.96
5
53.19
36.12
5
37.16
7
47.22
8
20.86 83.71
12 6
25.25 68.81
8 5
17.51 74.14
8 5
23.49 63.57
7 5
25.52 65.48
7 6
16.73 50.65
7 5
22.51 85.47
18 7
16.54 69.86
14 6
24.42 60.54
6 5
17.29 54.45
10 8
19.97 67.19
8 6
Record
Be~an
Mo/Yr
1/56
1/56
1/56
1/60
1/56
1/56
1/56
1/56
1/56
1/56
1/56
Last
Data
Mo/Yr
12/70
12/65
12/70
12/70
12/70
12/70
12/70
12/70
12/70
12/70
12/70
* First line of data in the table for each station is mean evaporation in inches; second line is the number of years of record per month; and third line is the coefficient
of variation in percent (computed only When there are 10 years or more of record durin~ 1956-1970).
** Climatological Data (NOAA-EDIS)
*** Sum of monthly means.
•••• Insufficient data between 1956-70 to compute the coefficient of variation.
~-
TABLE Il· --MONTHLY MEANS OF ESTIMATED "PAN EVAPORATION" COMPUTED FROM METEOROLOGICAL
MEASUREMENTS USING A FORM OF TRE PENMAN EOUATION*
Station Record Last
State Index May-Nov-Began Data
No. No.** Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Oct*** Apr*** Annual*** Mo/Yr Mo/Yr
COLORADO (continued)
Denver WSFO 5 2220 2.20 2.33 3.83 5.70 7.43 8.96 9.80 9.11 6.59 4.78 2.69 2.24 46.68 18.99 65.68 l/56 12/70
39° 45', 104° 52' 15 15 15 15 15 15 15 15 15 15 15 15
19 25 24 16 16 18 8 11 14 25 16 26 11 6 8
Grand Junction WS 5 3488 1.86 2.11 4.26 6.60 9.89 12.49 12.98 11.10 8.20 5.37 2.53 1.34 60.10 18.70 78.78 1/56 12/70
39° 7', 108° 31' 15 15 15 15 15 15 14 15 15 15 15 15
38 27 16 12 12 12 7 12 12 17 14 25 6 7 6
Pueblo WSO 5 6740 2.00 2.44 4.17 7.04 9.11 10.82 11.09 9. 72 7.35 5.28 2.96 2.27 53.37 20.88 74.19 1/56 12/70
38° 16, 104° 31' 14 15 15 15 15 15 15 15 15 15 15 15
31 26 25 18 12 14 8 8 12 18 18 29 8 12 8
CONNECTICUT
Bridgeport WSO 6 806 1.49 1.60 2. 53 3.67 4.81 5.50 5.82 5.36 4.29 3.44 2.13 1.49 29.21 12.83 42.16 3/60 12/70
41° 10'. 73 ° 7' 10 10 11 10 11 11 11 11 11 11 11 11
25 19 11 18 18 11 17 11 6 8 7 17 5 **** ****
Hartford WSO 6 3456 1.10 1.33 2.46 4.28 5.68 6.07 6.43 5.83 3.83 2.74 1. 70 1.07 30.59 11.94 42.53 1/56 12/70
41° 55', 72° 40' 15 15 15 15 15 15 15 15 15 15 15 15
29 20 16 18 17 12 18 11 16 18 17 20 10 12 10
DELAWARE
Wilmington WSO 7 9595 1.49 1.74 3.01 4.34 5.54 6.40 6.40 5.92 4.64 3.37 2.20 1. 52 32.29 14.27 46.51 1/56 12/70
39° 40', 75° 36' 15 14 15 15 15 15 15 15 15 15 15 15
23 20 17 12 13 7 17 13 1.2 10 7 17 7 8 6
~
Daytona Beach WB Airport 8 2158 3.32 3.88 5.19 6.86 7.53 7.04 7.11 6.71 5.89 5.30 4.04 3.20 39.58 26.49 66.07 1/56 12/70
29° 10', 81° 4' 15 15 15 15 15 15 15 15 15 15 15 15
11 7 13 8 11 R 5 6 10 11 6 10 5 5 3
Jacksonville WB Airport 8 4358 2.76 3.45 5.50 7.54 8.52 7. 73 7.92 7.28 5.94 4.64 3.50 2.89 42.03 25.63 67.65 1/56 12/70
30° 25', 81° 38' 15 15 15 15 15 15 15 15 15 15 15 15
12 10 11 6 12 12 7 6 11 16 10 13 5 5 5
Key-West WB Airport 8 4570 4.46 4.89 7.18 9.09 10.10 9 9.68 8.72 7.37 6.47 5.55 4.74 51 35.90 87 7/60 12/70
24" 33', 81° 45' 10 10 10 10 10 9 10 10 11 11 11 11
13 5 7 5 11 **** 6 3 5 6 7 10 **** 3 ****
* First line of data in the table for each station is mean evaporation in inches; second line is the number of years of record per -month; and third line is the coefficient
of variation in percent (computed only when there are 10 years or more of record during 1956-1970).
** Climatological Data (NOAA-EDIS)
*** Sum of monthly means.
**** Insufficient data between 1956-70 to compute the coefficient of variation.
<»
01
~ (continued)
Hiallli WSO
25" 48', so• 16'
Orlando WB Airport
28° 33', 81° 19'
Tallahassee WB AiGPort
30° 22', 84° 22'
Taapa WSO
27° 58', 82° 31'
West Pal• Beach WB Airport
26" 40', so• 6'
~
Athens WB Airport
33° 56', 83° 19'
Atlanta WB Airport
33" 38', 84° 25'
Augusta WB Airport
33° 22', 81° 58'
Coluabus WB Airport
32° 31, 84° 55'
Macon WB Airport
32° 41', 83° 38'
Savannah WB Airport
32° 7, 81° 11'
State
No.
8
8
8
8
8
9
9
9
9
9
9
TABLE II --MONTHLY MEANS OF ESTIMATED "PAN EVAPORATION" COMPUTED FROM METEOROLOGICAL
MEASUREMENTS USING A FORM OF THE PENMAN EQUATION*
Station
Index
No.** Jan
5663
6638
8758
8788
9525
435
451
495
2166
5443
7847
4.28
15
14
3.66
14
16
2.50
14
12
3.40
15
10
4.33
15
11
2.20
15
16
2.12
14
12
2.18
15
13
2.05
12
10
2.25
15
16
2.30
15
14
Feb
4.84
15
11
4.39
15
7
2.88
15
13
3.98
15
11
4.79
15
6
2.66
15
10
2.73
15
12
2. 75
15
10
2.66
12
12
2.92
15
12
2.87
15
8
Mar
6.59
15
12
6.00
14
11
4.63
15
11
5.73
15
14
6.52
15
10
4.16
15
18
4.28
15
17
4.25
15
16
4.16
12
11
4.64
15
13
4.76
14
14
Apr
7.84
15
11
7.66
15
10
5.94
15
7
7.57
15
8
7.74
15
6
5. 51
15
7
5.78
15
11
5.66
15
7
5. 51
12
10
6.47
15
7
6.70
15
5
Hay
7.85
15
12
8.53
15
11
7.01
15
12
8.84
15
5
7.94
15
10
6.43
15
13
7.03
15
12
6.27
15
16
6.76
12
13
7.85
15
14
7.62
15
16
Jun
6.96
15
11
7. 75 i4
6
6.96
15
10
8.15
15
8
7.10
14
7
6.64
15
12
7.10
15
12
6.62
15
8
6.76
13
10
7.67
15
11
7.51
15
12
Jul
8.03
15
11
7.74
13
3
6.36
15
7
7.74
15
7
7. 71
15
11
6.54
15
12
7.07
15
8
6.49
15
10
6.10
13
13
7.55
15
11
7.79
15
7
Aug
7.68
15
11
7.10
14
5
6.20
15
12
7.17
15
10
7.29
14
5
6.36
15
13
6. 70
15
12
6. 31
15
12
6.16
13
8
7.14
15
13
6.83
15
8
Sep
6.00
15
11
6.23
14
7
5.47
15
7
6.40
15
8
6.03
15
8
5.06
15
11
5.22
15
11
5.07
15
10
5.32
13
8
5.83
15
11
5.67
15
8
Oct
5.78
15
8
5.78
14
13
4.87
15
13
5.74
15
13
6.12
15
6
4.20
15
16
4.14
15
16
4.19
15
14
4.35
13
11
4.36
15
13
4.45
15
14
Nov
4.83
15
10
4.51
14
II
3.24
15
14
4.28
15
10
5.12
15
7
2.99
15
8
2.89
15
8
3.00
15
11
2.77
12
6
3.03
15
10
3.06
15
11
Dec
4.27
15
13
3.80
13
11
2.57
15
5
3.59
15
12
4.41
15
7
2.27
15
8
2.26
15
13
2.29
15
8
2.10
13
12
2.45
15
10
2.60
15
12
Hay-Nov-
Oct*** Apr***
42.30 32.67
6 5
43.17 29.72
5 6
36.87 21.75
6 5
44.03 28.56
5 6
42.40 32.92
3 5
35.22 19.79
5 5
37.25 20.15
5 6
34.96 20.13
5 6
35.48 19.29
5 5
40.40 21.76
5 5
39.87 22.22
5 6
Record
Began
Annual*** Mo/Yr
74.97
5
'72.39
5
58.57
5
72.60
5
75.29
3
55.01
5
57.13
5
55.09
5
54.91
5
62.16
5
61.82
5
1/56
1/56
2/56
1/56
1/56
1/56
1/56
1/56
6/58
1/56
1/56
Last
Data
Mo/Yr
12/70
12/70
12/70
12/70
12/70
12/70
12/70
12/70
12/70
12/70
12/70
* First line of data in the table for each station is mean evaporation in inches; second line is the number of years of record per month; and third line is the coefficient
of variation in percent (coaputed only when there are 10 years or more of record during 1956-1970).
** Cli .. tological Data (NOAA-EDIS)
*** Sua of .anthly 8eans.
**** Insufficient data between 1956-70 to coapute the coefficient of variation.
en en
TABLE II --MONTHLY MEANS OF ESTIMATED "PAN EVAPORATION" COMPUTED FROM METEOROLOGICAL
MEASUREMENTS USING A FORM OF THE PENMAN EOUATION*
IDAHO
Boise WB Airport
43° 34', 116° 13'
Pocatello WB Airport
42° 55', 112° 36'
ILLINOIS
Chicago WB Airport
41° 46, 87° 45'
Moline WSO
41 o 26 •, 90° 31 •
Peoria WSO
40° 40', 89° 40'
Rockford WSO
42 ° 11 • • 89 ° 6.
Springfield WSO
39° 49', 89° 40'
INDIANA
Evansville WSO
38° 3', 87° 31'
Fort Wayne WSO
41°0',85°11'
Indianapolis WSFO
39° 43', 86° 16'
Station
State Index
No. No.** Jan
10 1022
10 7211
11 1577
11 5751
11 6711
11 7382
11 8179
12 2738
12 3037
12 4259
1.58
15
122
0.97
15
38
1.09
15
26
0.88
15
25
0.91
15
29
0.79
12
29
1.09
15
24
1.29
15
18
0.86
15
25
1.06
15
26
Feb
1.63
15
26
1.38
15
37
1.37
15
23
1.17
15
23
1.26
15
17
1.08
12
25
l. 38
15
14
1.68
15
25
1.17
15
18
1.35
15
17
Mar
3.59
15
25
3.52
15
60
2.68
15
25
2.46
15
30
2.49
15
27
2.33
12
23
2.72
15
26
3.02
15
19
2.23
15
22
2.49
15
20
Apr
5.06
15
14
4.92
15
18
4.56
15
18
4.38
15
18
4.52
15
16
4.12
12
12
4.88
15
18
5.09
15
13
4.03
15
17
4.32
15
12
May
7.39
15
12
7.36
15
17
6.90
15
13
6.34
15
12
6.40
15
16
5.93
12
8
7.40
15
23
6.73
14
12
6.27
15
13
6.06
15
17
Jun Jul
9.23 12.09
15 15
14 5
8.87
15
19
8. 21
15
12
7.20
15
14
7.48
15
12
7.07
12
8
7.99
15
12
7.56
15
11
7.45
15
12
7.13
15
12
11.69
15
7
8.16
15
ll
7.45
15
12
7.49
15
12
7.13
11
7
8.05
15
12
7.72
15
6
7.51
15
10
6.99
15
l3
Aug
10.01
15
12
9.20
15
22
6.95
15
8
6.19
15
6
6.43
15
7
6.23
12
7
6.62
15
10
6.88
15
6
6.50
15
11
6.28
15
11
Sep
6.64
15
11
6.43
15
12
5.11
15
8
4.35
15
10
4.77
15
12
4.40
12
8
5.39
15
11
5.11
15
12
4.64
15
ll
4.71
15
l3
Oct
3.90
15
14
4.01
15
14
3.83
15
17
3.36
15
19
3.54
15
23
3.30
12
18
3.88
15
23
3.72
15
14
3.25
15
18
3.39
15
18
Nov
1.76
15
18
1.78
15
25
1.97
15
13
1. 72
15
18
1.80
15
13
1.61
12
14
2.12
15
16
2.05
15
12
1.60
15
16
1.73
15
18
Dec
1.09
15
36
1.01
15
31
1.19
15
20
1.07
15
32
0.97
15
22
0.83
12
17
1.18
15
20
1.32
15
22
0.90
15
18
1.09
15
25
Record Last
May-Nov-Began Data
Oct*** Apr*** Annual*** Mo/Yr Mo/Yr
49.25 14.72
5 18
47.56 13.58
8 20
39.16 12.86
6 12
34.90 11.67
6 ll
36.11 11.95
7 10
34.05 10.78
3 6
39.34 13.36
8
37.78 14.45
5 6
35.61 10.78
5 6
34.57 12.04
10 10
63.97
6
61.14
8
52.02
5
46.58
6
48.06
6
44.88
3
52.70
7
52.29
3
46.39
5
46 •. 61
8
1/56 12/70
l/56 12/70
1/56 12/70
1/56 12/70
1/56 12/70
1/59 12/70
1/56 12/70
1/56 12/70
1/56 12/70
1/56 12/70
* First line of data in the table for each station is mean evaporation in inches; second line is the number of years of record per month; and third line is the coefficient
of variation in percent (computed only when there are 10 years or more of record during 1956-1970).
** Climatological Data (NOAA-EDIS) *** Sum of monthly means.
**** Insufficient data between 1956-70 to compute the coefficient of variation.
en ......
TABLE II --MONTHLY MEANS OF ESTIMATED "PAN EVAPORATION" COMPUTED FROM METEOROLOGICAL
MEASUREMENTS USING A FORM OF THE PENMAN EQUATION*
~(continued)
South Bend WB Airport
41" 41', 86" 19'
IOWA
Burlington FAA Airport
40" 46', 91" 7'
Des Moines WSO
41" 31', 93° 38'
Sioux City WSO
42° 23', 96" 22'
Waterloo WSO
42° 33', 92" 23'
KANSAS
Concordia WSO
39" 33', 97° 38'
Dodge City WSO
37° 46', 99° 58'
Goodland WSO
39° 22'. 101" 41'
Topeka WSO
39" 4', 95" 37'
Wichita WSO
37" 38', 97" 25'
Station
State Index
No. No.** Jan
12 8187
13 1063
13 2203
l3 7708
13 8706
14 1767
14 2164.
14 3153
14 8167
14 8830
0.83
15
36
1.00
15
30
0.82
15
31
0.78
14
31
0.68
10
31
1.24
15
37
2.11
15
30
1.96
15
30
1.32
15
29
1.66
15
27
Feb
1.00
15
24
1.35
15
19
1.11
15
36
1.00
15
35
0.89
10
35
1.64
15
35
2.45
15
30
2.15
15
31
1.73
15
24
2.10
15
22
Mar
2.08
15
23
2.66
15
26
2.47
15
33
2.28
15
45
1.89
11
42
3.37
15
37
4.45
15
37
3.57
15
33
3.36
15
31
4.14
15
30
Apr
3.80
15
16
4.63
15
14
4.56
15
16
4.63
15
8
4.10
11
19
5.29
15
16
6.91
15
18
5.95
15
18
5.01
15
14
5.88
15
16
May
5.63
15
17
6.27
14
7
6.61
15
13
6.35
15
12
5.94
11
10
6.65
14
18
8.78
15
16
7.81
15
18
6.64
15
18
7.50
15
19
Jun
6.73
15
12
6.43
15
7
7.74
15
16
7.24
15
18
6.80
11
12
8.29
15
14
10.41
15
l3
9.74
15
18
6.94
15
14
8. 75
15
12
Jul
6.64
15
11
6.59
15
12
8.14
15
l3
7.35
15
12
6.97
11
12
9.39
15
14
11.18
15
l3
10.57
15
12
7.89
15
16
9.66
15
14
Aug
5.93
15
8
5.72
15
11
6.77
15
7
6.04
15
12
5.95
11
6
8.45
15
11
10.37
15
12
9.63
15
8
7.32
15
11
9.17
15
14
Seo
4.26
15
12
4.44
15
7
4.55
15
17
4.14
15
20
4.07
11
17
5.49
15
19
7.32
15
23
6.81
15
18
4.92
15
22
6.00
15
24
Oct
3.17
15
24
3.67
15
14
3.77
15
18
3.51
15
25
3.19
11
18
4.26
15
26
5.63
15
24
5.16
15
18
3.81
15
25
4.69
15
20
Nov
1. 61
15
19
1.93
15
18
1.81
15
24
1.67
15
23
1.55
11
16
2.20
15
19
3.09
15
20
2.79
15
16
2.14
15
17
2.63
15
22
Dec
0.88
15
24
1.05
14
30
1.04
15
29
0.93
15
38
0.71
11
33
1.52
15
20
2.23
15
25
2.03
15
22
1.41
15
23
1.98
15
41
Record Last
May-Nov-Began Data
Oct*** Apr*** Annual*** Mo/Yr Mo/Yr
32.35 10.20 42.56 1/56 12/70
6 10 6
33.18 12.84 46.25 1/56 12/70
5 8 5
37.57 11.81 49.38 1/56 12/70
7 12
34.63 11.24 46.03 1/56 12/70
10 12 10
32.92 9.86 42.85 3/60 12/70
6 16 7
42.56 15.27 57.90 1/56 12/70
11 17 12
53.69 21.24 74.93 1/56 12/70
10 14 10
49.71 18.47 68.17 1/56 12/70
10 l3 8
37.52 14.97 52.50 1/56 12/70
11 12 10
45.77 18.40 64.16 1/56 12/70
11 l3 10
* First line of data in the table for each station is mean evaporation in inches; second line is the number of years of record per month; anrl third line is the coefficient
of variation in percent (computed only when there are 10 years or more of record during 1956-1970).
** Climatological Data (NOAA-EDIS)
*** Sum of monthly means.
**** Insufficient data between 1956-70 to coapute the coefficient of variation.
en
CD
TABLE II --MONTHLY MEANS OF ESTIMATED "PAN EVAPORATION" COMPUTED FROM METEOROLOGICAL
MEASUREMENTS USING A FORM OF THE PENMAN EQUATION*
Station Record Last
State Index May-Nov-Began Data
No. No.** Jan Feb Mar Apr May Jun Jul A up: Sep Oct Nov Dec Oct*** Apr*** Annual*** Ho/Yr Mo/Yr
KENT!!.£!!_
Lexington WB Airport 15 4746 1. 31 1. 51 2.97 4.64 5.90 6.58 6.67 6.46 5.16 3.84 2.15 1.39 34.61 13.96 48.57 1/56 12/70
38 ° 1 ' • 84 ° 36 ' 15 15 15 15 15 15 15 15 15 15 15 15
31 24 23 13 11 8 10 12 18 17 12 18 6 12 6
Louisville WSO 15 4954 1.34 1. 51 3.14 5.11 6.57 7.05 7.30 6.84 4.96 3.54 2.14 1.62 36.26 14.87 51.13 1/56 12/70
3a• 1o•, as• 43' 15 ·15 15 15 15 15 15 15 15 15 15 15
30 30 20 17 12 12 12 7 12 13 11 33 7 12 7
LOUISIANA
Alexandria WB Airport 16 104 1.84 2.41 3.76 4.83 6.14 6.57 6.54 6.16 5.25 4.23 2.75 1.82 34.88 17.44 52.00 2/60 12/70
31° 23', 92° 18' 10 11 11 10 10 10 10 10 10 10 10 11
14 11 14 10 11 12 14 13 8 12 16 10 6 **** ****
Baton Rouge WB Airport 16 549 2.60 3.08 4.70 5. 51 6.83 7.13 6.73 6.29 5.66 4.93 3.30 2.57 37.58 21.76 59.34 1/56 12/70
30°31',91°8' 15 15 15 15 15 15 15 15 15 15 15 15
13 14 11 8 11 13 13 12 12 13 11 18 6 5 5
Lake Charles WB Airport 16 5078 2.29 2.71 4.33 5.58 7.30 7.63 7.43 6.73 5.77 4. 77 3.25 2.33 39.64 20.49 60.13 1/56 12/70
30 ° 7 ' ' 93 ° 13 ' 15 15 15 15 15 15 15 15 15 15 15 15
19 12 13 10 7 12 11 12 12 12 12 18 5 6 5
New Orleans WB Moisant 16 6660 2.47 2.97 4.42 5.42 6.86 6.92 6.56 6.14 5.56 4.91 3.22 2.52 36.94 21.02 57.96 1/56 12/70
29° 58'' 90° 15' 15 15 15 15 15 15 15 15 15 15 15 15
18 14 11 11 8 14 11 11 12 6 11 12 3 6 5
Shreveport WB Airport 16 8440 2.46 2.86 4.59 5.71 7.48 8.07 8.83 8. 21 6.15 4.87 3.04 2.28 43.61 20.94 64.55 1/56 12/70
32° 28', 93° 49' 15 15 15 15 15 15 15 15 15 15 15 15
29 8 22 14 11 12 11 11 16 13 18 16 7 8 6
~
Portland WSMO 17 6905 0.91 1.03 1.99 3.10 4.76 5.35 5.70 4.98 3.31 2.29 1.19 0.89 26.39 9.12 35.53 1/56 12/70
43° 38', 70" 19' 15 15 15 15 15 15 15 15 14 14 15 15
29 23 12 12 12 18 14 12 8 12 24 16 6 10 6
MARYLAND
Baltimore WSO 18 465 1.63 1.94 3.30 4.88 6.27 7.21 7.57 6.70 4.92 3.56 2.41 1.68 36.24 15.82 52.07 1/56 12/70
39° 10', 76° 40' 15 15 15 15 15 15 15 15 15 15 15 15
24 25 17 17 11 8 13 10 16 13 12 17 7 10 6
* First line of data in the table for each station is mean evaporation in inches; second line is the number of years of record per month; and third line is the coefficient
of variation in percent (computed only when there are 10 years or more of record during 1956-1970).
** Climatological Data (NOAA-EDIS)
*** Sum of monthly means.
****Insufficient data between 1956-70 to compute the coefficient of. variation.
en
(0
TABLE II --MONTHLY MEANS OF ESTIMATED "PAN EVAPORATION" COMPUTED FROM METEOROLOGICAL
MEASUREMENTS USING A FORM OF THE PENMAN EQUATION*
Station
State Index
Record Last
MASSACHUSETTS
Boston WSFO
42" 22', 71° 1'
Nantucket FAA Airport
41° 15', 70° 4'
Worcester WSO
42° 16', 71" 52' •
~
Alpena WSO
45° 4', 83° 34'
Detroit City WB Airport
42" 25', 83" I'
Detroit WSFO MET
42° 13', 83" 19'
Detroit WB Willow Run Airport
42° 13', 83" 31'
Flint WSO
42" 58', 83" 43'
Grand Repids WB Airport
42° 52', 85" 31'
Lansing WSO
42° 46', 84" 36'
Muskegon WSO
~3° 10', 86° 13'
No. No.** Jan
19
19
19
20
20
20
20
20
20
20
20
770
5159
9923
164
2102
2103
2104
2846
3333
4641
5712
1. 77
15
19
1.49
14
17
1.25
14
22
0.59
13
22
1.02
10
19
0.87
11
38
0.89
10
18
0.76
15
41
0.66
15
25
0.71
11
27
0.80
11
25
Feb
1.89
15
17
1. 73
14
31
1.40
1~
17
0.76
12
22
1.12
10
18
1.21
11
22
1.09
10
18
0.96
15
30
0.89
15
18
0.98
11
24
0.93
11
17
Mar
2.98
15
12
2.35
14
13
2.40
14
11
1.55
13
18
2.07
10
18
2.16
11
18
2.16
10
16
1.94
15
25
1.92
15
22
2.02
11
25
2.01
11
25
Apr
4.43
15
16
3.33
14
12
4.01
14
14
2.91
13
18
3.72
10
18
3.69
11
18
3.66
Hl
20
3.58
15
18
3.72
15
18
3.75
11
20
3.81
12
14
Hay
6.32
15
13
4.56
14
16
5.40
14
13
4.65
14
18
5.51
10
25
5.43
11
11
5.70
10
12
5.00
15
12
5.88
15
16
5.75
11
13
5.73
11
8
Jun
6.80
15
18
5.03
'14
16
5.62
14
12
5.63
13
14
6.92
10
10
6.54
11
10
6.66
10
6
5.92
15
11
7.08
15
12
6.68
11
13
6.74
11
10
Jul
7.26
15
18
5.06
14
18
5.91
14
16
6.31
13
12
7.18
10
7
6.85
11
7
7.11
10
12
6.26
15
11
7.23
15
8
6.96
11
8
7.11
11
6
A up:
6.44
14
10
4.31
13
16
5.28
14
12
4.88
14
8
6.01
10
7
5.90
11
12
5.91
10
6
5.41
15
10
6.13
15
11
5.81
11-
12
6.06
11
11
Sep
4.56
15
12
3.25
13
10
3.89
14
11
2.94
13
12
4.26
10
6
4.17
11
6
4.42
10
10
3.65
15
8
4.03
15
12
3.81
11
13
4.00
11
7
Oct
3.61
15
18
2.65
13
8
3.03
14
22
1.85
13
22
3.15
Hl
20
3.07
11
12
3.19
10
20
2.75
15
19
2.66
15
22
2.61
11
19
2.94
11
16
Nov
2.33
15
16
1.88
13
11
1.80
14
16
1.05
13
13
1.80
10
17
1.62
11
12
1.77
10
13
1.46
15
17
1.36
15
17
1.38
11
18
1.66
11
12
Dec
1.84
15
18
1.56
13
13
1.26
14
30
0.61
14
20
1.03
10
18
1.00
11
18
0.95
10
20
0.87
15
24
o. 74
15
20
0.72
11
33
0.94
11
20
May-Nov-Bep:an
Oct*** Apr*** Annual*** Mo/Yr
34.89 15.24 50.09 1/56
8 8 8
24.92 12.29 37.21 1/56
10 8 7
29.12 12.10 40.96 1/57
7 6 6
26.27 7.37 33.66 5/56
8 12 8
33.03 10.77 43.80 1/56
6 7 5
31.96 10.55 42.50 1/60
3 10 3
33.00 10.5 43.52 1/56
3 7
29.00 9.57 38.57 1/56
5 13 6
33.00 9.29 42.29 1/56
5 8 5
31.63 9.56 41.19 1/60
5 13 5
32.59 10.21 42.80 4/59
3 10 3
Data
Mo/Yr
12/70
7/69
12/70
12/70
12/65
12/70
12/65
12/70
12/70
12/70
12/70
* First line of data in the table for each station is mean evaporation in inches; second line is the number of years of record per month; and third line is the coefficient
of variation in percent (computed only when there are 10 years or more of record during 1956-1970).
** Climatological Data (NOAA-EDIS)
*** Sua of aonthly .. ana.
**** Insufficient data between 1956-70 to coapute the coefficient of variation.
.....,
0
TABLE II --MONTHLY MEANS OF ESTIMATED "PAN EVAPORATION" COMPUTED FROM METEOROLOGICAL
MEASUREMENTS USING A FORM OF THE PENMAN EQUATION*
Station Record Last
State Index May-Nov-Began Data
No. No.** Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Oct*** Apr*** Annual*** Mo/Yr Mo/Yr
MICHIGAN (continued)
Sault Sainte Marie WB Airport 20 7366 0.41 0.57 1.36 2.74 4.65 5.43 5.85 4.74 2.62 1.74 0.83 0.47 25.03 6.34 31.21 1/56 12/70
46° 28', 84" 22' 14 14 15 15 15 15 15 15 15 15 15 15
25 24 10 17 13 16 12 12 14 22 22 33 5 8 5
MINNESOTA
Duluth WSO 21 2248 0.52 0.69 1.59 3.16 5.05 5.59 6.47 5.25 3.08 2.31 1.01 0.51 27.74 7.48 35.22 1/56 12/70
46" 49', 92" 10' 15 15 15 15 15 15 15 15 15 15 15 15
18 18 19 13 17 12 12 18 13 24 20 25 6 8 5
International Falls WSO 21 4026 0.36 0.57 1.39 3.14 5.12 5.82 6.20 4.96 2.92 2.17 0.75 0.34 27.18 6.63 33.61 1/56 ll/70
48" 34', 93" 22' 15 15 15 15 15 15 15 15 15 15 15 14
37 18 19 12 12 13 ll 12 14 25 26 43 5 10 3
Minneapolis WSO 21 5435 0.67 0.90 2.03 4.ll 6.10 7.25 7.88 6.52 4.01 2.92 1.28 o. 73 34.67 9.67 44.15 1/56 12/70
44" 52', 93" 13' 14 15 15 15 15 15 15 15 15 15 15 15
23 26 35 18 17 13 16 10 17 20 20 25 7 17 7
Rochester WSO 21 7004 0.69 0.88 1.73 3.89 5.81 6.77 7.02 5.83 4.03 3.30 1.40 0.71 32.77 9.29 42.06 1/56 12/70
43" 55', 92" 30' 15 15 15 15 15 15 15 15 15 15 15 15
38 37 37 16 II 12 12 12 10 18 23 24 5 14 5
MISSISSIPPI
Jackson WB Airport 22 4472 1.90 2.36 4.02 5.58 6.95 7.38 7.49 6.85 5.44 3.94 2.62 1.96 37.34 18.37 55.70 1/56 12/70
32" 19', 90" 4' 15 15 15 15 14 15 15 15 14 14 14 15
23 10 18 8 8 12 12 II 14 12 R 17 5 7 5
Meridian WB Airport 22 5776 I. 91 2.57 4.13 5.45 6.52 7.00 6.68 5.97 5.23 4.22 2.78 1.99 35.71 18.1!1 54.52 9/59 12/70
32" 19', 88" 45' ll II ll ll ll II II II 12 12 12 12
16 ll 16 6 II II 12 II 10 12 7 6 6 5 5
MISSOURI
Columbia WSO 23 1790 1.36 1.67 3.16 5.29 6.91 7.33 8.22 7.55 5.41 4.19 2.35 1.46 39.62 15.28 54.89 1/56 12/70
38" 49', 92" 13' 15 15 15 15 15 15 15 15 15 15 15 15
29 14 25 18 12 12 12 II 18 20 17 19 6 ll 7
Kansas City WSO 23 4359 1.37 1.83 3.47 5.45 7.34 7.94 8.84 8.09 5.69 4.47 2.39 1.56 42.36 16.07 58.43 1/56 12/70
39° 7', 94" 36' 15 15 15 15 15 15 15 15 15 15 15 15
32 20 26 12 16 13 14 12" 20 24 25 20 10 12 8
* First line of data in the table for each station is mean evaporation in inches; second line is the number of years of record per month; and third line is the coefficient
of variation in percent (computed only when there are 10 years or more of record during 1956-1970).
** Climatological Data (NOAA-EDIS)
*** Sum of monthly means.
**** Insufficient data between 1956-70 to compute the coefficient of variation.
.....,
TABLE II --MONTHLY MEANS OF ESTIMATED "PAN EVAPORATION" COMPUTED FROM METEOROLOGICAL
MEASUREMENTS USING A FORM OF THE PENMAN EQUATION*
Station
State Index
Record Last
~ (continued)
St Louis WSFO
38° 45', 90° 22'
Springfield WSO
37° 13', 93° 22'
~
Billings WB Airport
45• 48', toa• 31'
Great Falls WB Airport
47° 28', 111° 21'
Helena WB Airport
46° 36', 112• O'
Missoula WB Airport
46° 55', 114° 4'
NEBRASKA
Grand Island WSO
40° 58', 98° 19'
North Platte WSO
41• 7', too• 40'
Omaha WSFO
41° 18', 95° 53'
Scotts Bluff WSO
41° 52', 103° 36'
No. No.** Jan
23 7455
23 7976
24 807
24 3751
24 4055
24 5745
25 3395
25 6065
25 6255
25 7665
1.36
15
25
1.68
15
25
1.50
15
43
1.50
14
49
0.84
15
37
0.44
15
42
1.16
15
37
1.18
15
38
1.06
15
24
1. 51
15
25
Feb
1.77
15
12
1.98
15
12
1.96
15
37
1.76
14
43
1.23
15
37
0.78
15
32
1.49
15
35
1.42
15
37
1.43
15
33
1.89
15
26
Mar
3.27
15
25
3.50
15
27
3.03
15
30
2.81
15
30
2.24
15
26
1.84
15
23
2.95
15
37
2.84
15
35
3.04
15
32
3.14
15
25
Apr
5.24
15
16
5.35
15
12
4.35
15
18
4.30
15
18
3. 77
15
14
3.48
15
12
5.35
15
13
5.02
15
18
5.26
15
12
5.10
15
18
May
6.81
15
13
6.46
15
13
6.36
15
16
6.35
15
16
5.87
15
16
5. 31
15
18
7.05
15
17
6.56
15
18
7.04
15
16
6.95
15
14
JW1
7.61
15
12
6.73
15
12
Jul
7.98
15
12
7.69
15
13
7.48 10.21
15 15
22 11
7.64
15
19
6.81
15
20
6.10
15
14
8.49
15
14
8.01
15
18
8.21
15
13
8.46
15
13
10.19
15
14
9.39
15
11
9.21
15
16
9.19
15
12
8.45
15
12
8.63
15
12
9.77
15
8
Au~
7.08
15
8
7.56
15
12
9.02
15
10
8.95
15
13
7.88
15
12
7.37
15
14
8.28
15
6
7.85
15
10
7.26
15
5
8.60
15
8
Sep
5.35
15
14
5.31
15
20
5.79
15
18
5.78
15
24
4.64
15
18
4.04
15
20
5.53
15
18
5.27
15
16
4.68
15
17
6.04
15
12
Oct
4.00
15
22
4.13
15
24
4.29
15
20
4.29
15
25
2.95
15
18
1.86
15
14
4.45
15
22
3.83
-15
22
3.82
15
22
4.32
15
18
Nov
2.27
15
16
2.44
15
17
2.32
15
18
2.37
15
27
1.41
15
18
0.79
15
24
2.19
15
23
2.02
15
14
2.01
15
22
2.38
15
14
Dec
1.44
15
22
1.67
15
18
1.90
15
26
1.83
15
37
0.96
15
26
0.46
15
45
1.75
15
52
1.37
15
18
1.27
15
22
1.59
15
30
May-Nov-Be~an
Oct*** Apr*** Annual*** Mo/Yr
38.83 15.35 54.18 1/56
5 8 6
37.89 16.63 54.51 1/56
7 10 6
43.14 15.06 58.19 1/56
6 12 6
43.20 14.63 57.42 1/56
8 12 8
37.54 10.44 47.99 1/56
7 10 6
33.89 7.80 41.68 1/56
8 12 8
42.98 14.89 57.88 1/56
7 10 6
39.97 13.85 53.82 1/56
8 13 8
39.64 14.06 53.70 1/56
5 12 6
44.14 15.62 59.75 1/56
5 8 5
Data
Mo/Yr
12/70
12/70
12/70
12/70
12/70
12/70
12/70
12/70
12/70
12/70
* First line of data in the table for each station is mean evaporation in inches; second line is the number of. years of record per month; and third line is the coefficient
of variation in percent (computed only when there are 10 years or more of record during 1956-1970).
** Climatological Data (NOAA-EDIS)
*** Sum of monthly means.
****Insufficient data between 1956-70 to compute the coefficient of variation.
......
N
TABLE II --MONTHLY MEANS OF ESTIMATED "PAN EVAPORATION" COMPUTED FROM METEOROLOGICAL
MEASUREMENTS USING A FORM OF THE PENMAN EQUATION*
Station Record Last
State Index May-Nov-Began Data
No. No.** Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Oct*** Apr*** Annual*** Mo/Yr Mo/Yr
~
Elko FAA Airport 26 2573 0.92 1.38 2.68 4.15 6.26 8.00 10.49 8.93 6.16 3.90 1.80 0.99 43.20 12.04 55.39 1/56 12/70
40° 49 1 , 115° 46' 14 14 14 15 14 14 11 13 13 14 14 13
31 24 18 14 14 14 5 7 8 14 20 29 3 8 ****
Ely WB Airport 26 2631 1.62 1. 76 3.34 4.82 7.46 9.31 11.14 9.72 7.13 4.63 2.33 1.66 49.39 15.64 65.05 1/56 12/70
39° 16', 114° 51' 15 15 14 H 15 15 15 H 15 H 15 15
23 18 23 19 17 17 7 11 10 16 23 29 5 11 5
Las Vegas WB Airport 26 4436 3.67 4.55 7.81 10.67 14.72 16.92 17.32 15.49 12.02 8.22 4.62 3.39 84.69 34.72 119.41 1/56 12/70
36• 4', us• to• 15 15 15 15 15 15 15 15 15 15 15 15
10 16 10 12 6 7 8 8 7 8 10 13 5 6 5
Reno WB Airport 26 6779 1.56 2.04 3.61 5.08 6.98 8.54 9.89 8.64 5.81 3.86 2.00 1.35 43.72 15.65 59.38 1/56 12/70
39° 30', 119° 46' 15 15 15 15 15 15 15 15 15 15 15 15
25 20 12 12 11 12 5 6 5 12 13 27 3 7 3
'
Winnemucca WB Airport 26 9171 1.16 1.61 2.92 4.39 6.67 8.95 11.61 9.75 6.57 3.89 1.93 1.08 47.27 12.95 60.38 1/56 12/70
4o• 53', 111• 48' 13 12 13 13 13 13 13 13 13 12 13 12
30 29 18 19 19 17 8 8 12 18 14 19 6 7 5
NEW !lAMP~
Concord WSO 27 1683 0.78 0.95 1.88 3.15 4.82 5.23 5.57 4.83 3.07 2.21 1.14 0.82 25.73 8.72 34.44 1/56 12/70
43° 11', 71° 30' 15 15 15 15 15 15 15 15 15 15 15 15
26 22 18 22 16 18 14 7 13 16 22 19 7 12 8
NEW JERSEY
Atlantic City WSO 28 311 1.58 1.78 2.99 4.52 6.00 6.67 6.82 6.00 4.54 3.22 2.21 1.56 33.24 14.65 47.77 1/59 12/70
39° 26', 74° 34' 12 12 12 12 12 12 12 11 12 12 12 12
25 17 12 18 14 11 16 10 12 14 12 16 7 7 7
Newark WSO 28 6026 1.65 1.84 3.15 4.51 5.89 6. 72 6.89 6.36 4.92 3. 71 2.3'1 1.64 34.51 15.18 49.69 1/56 12/70
40° 41', 74° 10' 15 15 15 15 15 15 15 15 15 15 15 15
25 17 13 14 18 10 18 12 12 13 11 16 8 7 7
NEW MEXI£Q_
Albuquerque WB Airport 29 234 2.47 3.31 5.70 8.73 11.80 13.46 12.50 10.78 8.52 6.07 3.36 2.38 63.14 25.96 89.10 1/56 12/70
35° 3 •• 106° 37' 15 15 15 15 15 15 15 15 15 15 15 15
13 13 16 8 8 5 6 8 12 12 11 17 5 7 5
* First line of data in tbe table for each station is mean evaporation in inches; second line is the number of years of record per month; anrl third line is the coefficient
of variation in percent (computed only when there are 10 years or more of record during 1956-1970).
Climatologi~~l Data (NOAA-EDIS) ** *** Sum of monrn~y means.
**** Insufficient data between 1956-70 to compute the coefficient of variation.
-...!
(1.1
TABLE II --MONTHLY MEANS OF ESTIMATED "PAN EVAPORATION" COMPUTED FROM METEOROLOGICAL
MEASUREMENTS USING A FORM OF TRE PENMAN EQUATION*
Station
State Index
Record Last
NEW MEXICO (continued)
Roswell WSO
33° 18'. 104° 31'
~
Albany WSFO
42° 45', 73° 48'
Binghamton WSO
42° 13', 75° 58'
Buffalo WSFO
42° 55', 78° 43'
New York WB LaGuardia Airport
40° 46', 73° 52'
Rochester WSO
43• 1 •. n• 4o'
Syracuse WSO
43° 7'. 76° 7'
NORTI! CAROLINA
Cape Hatteras WSO
35° 16', 75° 33'
Charlotte WSO
35• 13', so• 55'
Greensboro WSO
36° 4', 79° 49'
No. No.** Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
29 7609
30 42
30 687
30 1012
30 5811
30 7167
30 8383
31 1458
31 1690
31 3630
2.85 4 6 8 12 13 11 10 8 6 4 3
10 8 9 9 9 9 9 8 9 9 9 9
23 **** **** **** **** **** **** **** **** **** **** ****
0.72
15
35
0.70
15
20
0.97
14
25
1.98
15
23
0.91
15
51
o. 79
15
42
2.12
15
13
1.95
15
16
1.82
15
18
1.01
15
25
0.84
15
27
0.98
15
18
2.15
15
14
0.94
15
24
0.95
15
24
2.42
15
14
2.44
15
8
2.21
15
13
2.00
15
17
1.68
15
18
1. 75
15
16
3.32
15
11
1.79
15
18
1. 77
15
18
3.69
15
17
4.07
15
17
3.95
15
25
3. 77
15
17
3.32
15
20
3.35
15
23
4.69
15
12
3.50
15
19
3.48
15
17
5.44
15
14
6.04
15
8
5.25
15
13
5.00
15
14
4.85
15
20
5.07
15
16
6.35
15
14
5.21
15
18
4.96
15
16
6.69
15
18
7.16
15
12
6.41
15
12
5.84
15
11
5.79
15
14
6.50
15
12
7.25
15
8
6.56
15
11
6.15
15
11
7.07
15
14
7.63
15
12
6.72
15
8
6.37
15
11
5.92
15
18
6.93
15
11
7.64
15
17
6.78
15
12
6.58
15
14
7. 59
15
13
7.64
15
11
6.69
15
8
5.39
15
8
5.13
15
13
5.72
15
10
6.73
15
12
5.69
15
8
5.60
15
7
6.57
15
10
7.06
15
8
6.21
15
12
3.55
15
12
3.54
15
19
4.07
15
12
5.50
15
10
3.79
15
12
3.76
15
14
5.64
15
12
5.45
15
12
4.64
15
11
2.54
15
18
2.42
15
20
2.74
15
18
4.18
15
12
2.68
15
18
2.54
15
19
4.05
15
10
3.87
15
17
3.49
15
18
1.41
15
13
1.29
15
23
1.51
15
12
2.82
15
8
1.45
15
17
1.52
15
18
2.91
15
10
2.70
15
10
2.47
15
11
0.78
15
25
o. 72
15
22
1.01
15
19
1.95
15
25
0.94
15
25
0.89
15
23
2.26
15
13
2.07
15
10
1.86
15
12
May-Nov-Began
Oct*** Apr*** Annual*** Mo/Yr
60 28 88 1/56
**** **** ****
28.70 9,69 38.40 1/56
5 12 5
27.64 8.56 36.20 1/56
10 10
31.02 9.65 40.89 1/56
5 3
37.64 16.91 54.55 1/56
5 6 5
30.71 9.53 40.24 1/56
6 12 5
29.58 9.39 38.97 1/56
12
37.61 18.85 56.45 1/56
8 6 6
38.81 19.27 58.08 1/56
3 3
34.16 17.56 51.72 1/56
3 6 3
Dsta
Mo/Yr
12/68
12/70
12/70
12/70
12/70
12/70
12/70
12/70
12/70
12/70
* First line of data in the table for each station is mean evaporation in inches; second line is the number of years of record per month; and third line is the coefficient
of variation in percent (computed only when there are 10 years or more of record during 1956-1970).
** Climatological Dsta (NOAA-EDIS)
*** Sum of monthly means.
**** Insufficient data between 1956-70 to compute the coefficient of variation.
.....
~
NORTH CAROLINA (continued)
Raleigh Durham WB Airport
35" 52', 78° 46'
Wilmington WSO
34" 16', 77" 55'
Winston-Salem WB Airport
36" 7'' 80" 13'
NORTH DAKOTA
Bismarck WSO
46° 46', 100° 45'
Fargo WSO
46" 53', 96" 48'
Williston WSO
48" 10', 103" 37'
OHIO
Akron Canton WSO
40" 55', 81" 25'
Cleveland WSFO
41" 23', 81" 51'
Columbus WSO
40" o•, az• 52'
Dayton WSO
39" 53'. 84" 13'
State
No.
31
31
31
32
32
32
33
33
33
33
Station
Index
No.**
7069
9457
9539
819
2859
9425
58
1657
1786
2075
TABLE II --MONTHLY MEANS OF ESTIMATED "PAN EVAPORATION" COMPUTED FROM METEOROLOGICAL
MEASUREMENTS USING A FORM.OF THE PENMAN EOUATION*
Jan
2.01
15
19
2.10
15
18
2.14
10
16
0.55
15
38
0.50
13
44
Feb
2.44
15
12
2.64
15
12
2.44
10
7
0.71
14
24
0.68
14
25
0 1
9 9
**** ****
0.95
15
33
1.02
15
32
1.06
15
41
1.14
15
35
1.12
15
23
1.16
15
22
1.23
15
18
1.38
15
16
Mar
4.07
15
22
4.21
15
18
4
9
****
1.95
14
31
1.63
15
37
1.53
10
31
2.10
15
20
2.15
15
22
2.55
15
20
2.58
15
20
Apr
5.81
15
12
6.35
15
8
6
9
****
4.07
15
17
3.64
14
19
3.56
10
19
3.70
15
18
3.89
15
16
3.92
15
17
4.35
15
17
Hay
6.38
15
16
7.31
15
12
7
9
****
6.49
15
16
5.91
15
24
6.19
10
13
5.09
15
12
5.86
15
12
5. 73
15
16
6.34
15
16
Jun
6.87
14
12
7.24
15
8
7
9
****
7.28
15
18
6.54
15
13
Jul
6.89
15
12
7.53
15
14
7
9
****
8.68
15
16
7.77
15
16
6.93 9
10 9
13 ****
5.99
15
16
6.84
15
8
6.59
15
12
7.58
15
11
6.10
15
12
6.83
15
8
6.79
15
12
7.46
15
14
Au!!;
6.25
15
14
6.40
15
11
6
9
****
8.11
15
17
7.08
15
12
Sep
4.88
15
12
5.34
15
10
5
9
****
4.82
15
18
4.21
15
18
7. 72 5
10 9
14 ****
5.63
15
7
5.89
15
11
5.90
15
13
6.81
15
10
4.19
15
12
4.24
15
11
4.10
15
20
5.04
15
10
Oct
3.56
15
16
4.00
15
14
4
9
****
3.27
15
20
2.92
15
25
3
9
****
3.27
15
17
3.12
15
18
3.01
15
18
3.54
15
16
Nov
2. 71
15
12
2.86
15
12
3
9
****
1.33
14
26
1.13
15
31
1
9
****
1.81
15
13
1.87
15
12
1.71
15
14
1.90
15
14
Dec
2.15
15
13
2.39
15
10
2
9
****
0.68
15
35
0.56
14
36
1
9
****
1.00
15
26
1.20
15
25
1.08
15
24
1.22
15
19
Hay-Nov-
Oct*** Apr***
34.90 19.18
6
37.81 20.55
5 8
36 20
**** ****
38.65 9.37
8 11
34.42 8.28
19
38 8
**** ****
30.28 10.67
12
32.78 11.29
5 10
32.13 11.56
12
36.77 12.56
6 8
Record Last
Began
Annual*** Mo/Yr
54.29 1/56
58.35 1/56
56 1/56
****
47.48 1/56
43.39 2/56
5
46 1/56
****
40.94 1/56
5
44.07 1/56
5
43.69 1/56
6
49.34 1/56
6
Data
Mo/Yr
12/70
12/70
2/65
12/70
12/70
12/70
12/70
12/70
12/70
12/70
* First line of data in the table for each station is mean evaporation in inches; second line is the number of years of record per month; and third line is the coefficient
of variation in percent (computed only when there are 10 years or more of record during 1956-1970).
** Climatological Data (NOAA-EDIS)
*** Sum of monthly means.
**** Insufficient data between 1956-70 to compute the coefficient of variation.
.....
01
TABLE II --MONTHLY MEANS OF ESTIMATED "PAN EVAPORATION" COMPUTED FROM METEOROLOGICAL
MEASUREMENTS USING A FORM OF THE PENMAN EQUATION*
Station
State Index
Record Last
OHIO (continued)
Toledo WB Airport
41" 36', 83" 48'
Youngstown WSO
41" 16', so• 40'
~
Oklahoma City WSFO
35" 23', 97° 36'
Tulsa WSO
36" 10', 95" 53'
OREGON
Astoria WB Airport
46" 8', 123" 52'
Medford WB Airport
42" 22', 122" 52'
Pendleton WB Airport
45" 40'' 118" 51'
Portland WB Airport
45" 36', 122" 36'
Salem WB Airport
44" 55', 123" 1'
No. No.** Jan
33 8357
33 9406
34 6661
34 8992
35 328
35 5429
35 "6546
35 6751
35 7500
0.81
15
32
0.84
15
31
2.00
15
38
1.91
15
31
0.95
15
23
o. 73
15
26
1.13
15
44
1.07
15
29
0.93
15
29
Feb
1.09
15
23
1.00
15
16
2.54
15
22
2.34
15
18
1.24
15
32
1.30
15
18
1.68
15
26
1.47
15
26
1. 24
15
24
Mar
2.13
15
25
2.06
15
18
4.47
15
31
4.05
15
30
1.83
15
24
2.62
15
20
3.16
15
12
2. 23
15
18
2.09
15
23
Apr
3.66
15
18
3.58
15
18
6.33
15
17
5.89
15
18
2.53
15
14
4.08
15
16
4.72
15
18
3.06
15
16
2.90
15
18
May
5.86
15
16
4.97
15
14
7.37
15
17
6.76
15
18
3.73
15
13
5.93
15
16
6. 73
15
17
4.65
15
20
4.10
15
18
Jun
6.63
15
11
5.89
15
8
8.61
15
10
7. 79
15
13
4.10
15
13
7.99
15
18
9.31
15
10
5. 77
15
18
5.44
15
14
Jul
6.83
15
12
5.88
15
14
10.06
15
13
9.09
15
17
4.81
15
11
10.28
15
10
11.88
15
7
7.45
15
13
7.41
15
12
A up:
5.84
15
7
5.29
15
10
9.62
15
14
8.37
15
18
4.02
15
12
B. 77
15
11
9.92
15
10
6.12
15
16
6.17
15
14
Sep
4.09
15
7
3.88
15
14
6.36
15
24
5.94
15
25
2.82
15
12
5.87
15
11
6. 74
15
10
3.89
15
16
4.20
15
13
Oct
2.94
15
20
3.02
15
20
5.01
15
19
4.70
15
24
1.58
15
22
2.75
15
20
3.53
15
18
2.05
14
17
2.13
15
12
Nov
1.51
15
31
1. 72
15
23
3.15
15
19
2.97
15
18
1.03
15
19
0.99
15
31
1.62
15
17
1.25
15
20
1.09
15
25
Dec
G.83
15
19
0.92
15
18
2.30
15
22
2.10
15
16
o. 96
15
74
0.57
15
43
1.09
15
35
0.89
15
16
0.79
15
38
May-Nov-Began
Oct*** Apr*** Annual*** Mo/Yr
32.20 10.03 42.23 1/56
11 6
28.93 10.11 39.04 l/5n
6 8 5
47.03 20.78 67.81 1/56
10 13 8
42.65 19.25 61.90 1/56
12 14 12
21.07 8.54 29.61 1/56
5 12 5
41.59 10.30 51.89 1/56
6 10 6
48.10 13.39 61.50 1/56
5 11 5
30.23 9.97 40.30 1/56
11 8
29.46 9.04 38.50 1/56
8
Data
Mo/Yr
12/70
12/70
12/70
12/70
12/70
12/70
12/70
12/70
12/70
* First line of data in the table for each station is mean evaporation in inches; second line is the number·of years of record per month; and third line is the coefficient
of variation in percent (computed only when there are 10 years or more of record durinp: 1956-1970).
** Climatological Data (NOAA-EDIS)
*** Sum of monthly means.
**** Insufficient data between 1956-70 to compute the coefficient of variation.
..... en
PENNSYLVANIA
Allentown WSO
40° 3S', 75° 25'
Erie WSO
42 • 4 •, so·· 11 •
Harrisburg FAA Airport
4o• 13', 76° 51'
Philadelphia WSFO
39° 52', 75° 13'
Pittsburgh WSO
4o• 30', so• 13'
Scranton WSO
41° 19', 75° 43'
Williamsport WSO
4[0 15', 76° 55'
RHODE ISLAND
Providence WSO
4[0 43', 7[0 25'
SOUTI! CAROLINA
Charleston WSO
32• 53', so• t'
Columbia WSFO
33• 56', st• 7'
Station
State Index
TABLE II --MONTHLY MEANS OF ESTIMATED "PAN EVAPORATION" COMPUTED FROM METEOROLOGICAL
MEASUREMENTS USING A FORM OF THE PENMAN EQUATION*
Record
May-Nov-Began
No. No.** Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Oct*** Apr*** Annual*** Mo/Yr
36 106
36 2682
36 3699
36 6SS9
36 6993
36 7905
36 9728
37 6698
38 1544
38 1939
[.29
15
31
1.09
10
38
[.40
15
25
[.47
15
25
1.09
15
32
0.94
15
30
[.12
10
30
1.49
15
23
2.46
15
12
2.01
15
12
1. 47
15
25
1.02
11
17
1.72
15
20
1. 78
15
19
1.26
14
20
1.13
15
20
1.27
10
24
1.66
15
16
3.11
15
11
2.53
15
8
2.60
15
16
1.96
11
20
2.92
15
12
3.00
15
16
2.42
15
22
2.12
15
20
2. 21
10
18
2.83
15
11
4.68
15
18
4.45
15
14
4.01
15
14
3.62
11
19
4.66
15
16
4.67
15
14
4.07
15
17
3.S7
15
19
3.76
10
18
4.35
15
16
6.28
15
s
6.47
15
7
5.16
15
17
5.11
11
17
6.16
15
16
6.19
15
13
5.58
15
17
5.41
15
17
4.82
10
17
5.75
15
14
7.32
15
14
7.21
15
16
6.02
15
10
6.34
11
17
6.94
15
11
7.0S
15
6
6.43
15
10
6.10
15
12
5.49
11
10
6.17
15
13
7.13
15
8
7.51
15
13
6.05
15
18
6.5S
11
11
7.51
15
16
7.13
15
11
6. 74
15
12
6.22
15
14
5. 54
11
16
6.51
15
14
7.28
15
13
7.67
15
11
5.37
15
11
5. 79
11
7
6.41
15
10
6.44
15
s
5.91
15
10
5.45
15
10
4.73
11
13
5. 77
15
12
6.53
15
11
6.99
15
13
3.91
15
18
4.31
11
10
4.39
15
13
4.74
15
12
4.29
15
18
3. 71
15
17
3.45
11
18
4.16
15
8
5.26
15
12
5.55
15
10
2.90
15
12
3.48
11
17
3.05
15
12
3.35
15
6
3.17
15
18
2.60
15
17
2.54
12
20
3.09
15
13
4.22
14
18
3.92
15
14
1.78
15
12
2.03
11
11
1.95
15
11
2.18
15
10
1.87
14
17
1. 52
15
17
1.56
12
17
2.05
15
12
3.12
15
13
2.82
15
8
1.16
15
14
1. 32
11
18
1.41
15
12
1.56
15
17
1.15
15
17
0.98
15
16
1.07
12
18
1.51
15
12
2.66
15
11
2.23
15
12
29.42
31.61
5
34.46
8
34.93
5
32.11
6
29.49
26.55
31.45
37.61
38.85
6
12.31 41.73 1/56
8 5
11.09 42.R2 2/60
12 5
14.06 48.52 1/56
5
14.67 49.60 1/56
8 5
11.82 43.62 1/56
11 6
10.55 40.04 1/56
11
10.98 37.53 10/59
5
13.88 45.33 1/56
6 6
22.31 59.94 1/56
20.52 59.37 1/56
5 5
Last
Data
Mo/Yr
12/70
12/70
12/70
12/70
12/70
12/70
12/70
12/70
12/70
12/70
* First line of data in the table for each station is mean evaporation in inches; second line is the number of years of record per IIIOnth; and third line is the coefficient
of variation in percent (computed only when there are 10 years or more of record during 1956-1970).
** Climatological Data (NOAA-EDIS)
*** Sum of monthly means.
**** Insufficient data between 1956-70 to compute the coefficient of variation.
~
~
TABLE II --MONTHLY MEANS OF ESTIMATED "PAN EVAPORATION" COMPUTED FROM METEOROLOGICAL
MEASUREMENTS USING A FORM OF THE PENMAN EQUATION*
Station Record Last
State Index May-Nov-Began Data
No. No.** Jan Feb Mar Apr May Jun Jut Aug Sep Oct Nov Dec Oct*** Apr*** Annual*** Mo/Yr Mo/Yr
SOUTH CAROLINA (continued)
Greenville Spartanburg 38 3747 2.09 2.56 4.33 6.01 6.88 6.92 7.08 6.67 5.06 3.93 2.92 2.17 36.56 20.07 56.63 1/56 12/70
34" 53', 82" 13' 15 15 15 15 15 15 15 15 15 15 15 15
18 8 18 12 14 12 10 13 12 17 12 10 6 6 5
SOUTH DAKOTA
Huron WSO 39 4127 0.69 0.83 2.15 4.45 6.26 7.68 8.89 7.68 4.96 3.52 1.60 0.84 38.99 10.62 49.90 1/56 12/70
44° 22', 98° 13' 14 15 15 15 15 15 15 15 15 15 15 15
39 47 44 17 14 22 14 11 18 20 25 33 10 16 8
llapid City WSO 39 6937 1.31 1.49 2.80 4.69 6.51 7.67 9.27 9.15 6.26 4.55 2.26 1.49 43.42 14.16 57.75 1/56 12/70
44" 3', 103° 4' 14 15 15 15 15 15 15 15 15 15 15 15
26 23 26 16 14 22 14 14 16 19 16 25 10 7 7
Sioux Falls WSO 39 7667 0.78 1.00 2.23 4.45 6.50 7.76 8.49 7.35 4.80 3.63 1.69 0.93 38.53 11.09 49.62 1/56 12/70
43" 34', 96" 43' 15 15 15 15 15 15 15 15 15 15 15 15
30 23 37 10 11 16 12 10 17 18 18 29 6 11 6
TENNESSEE
Bristol WB Airport 40 1094 t. 37 1. 77 3.19 4.48 5.32 5.73 5.68 5.37 4.64 3.&0 2.07 1.45 30.34 14.36 44.70 11/59 12/70
36° 28', 82° 23' 11 11 11 11 11 11 11 11 11 11 12 12
20 12 18 12 14 8 12 tO t2 t6 t2 t8 6 3 3
Chattanooga WB Airport 40 t656 t.48 t.98 3.56 5.29 6.4t 6.52 6.68 6.t7 4.87 3.33 2.to t.54 33.99 t5.95 49.94 t/56 t2/70
35• 1', 85• 11' t5 t5 t5 t5 t5 15 t5 t5 t5 t5 t5 t5
t8 11 t7 to 13 13 t2 13 t2 t8 11 t2 7 6 5
Knoxville WB Airport 40 4950 t.45 t.94 3.62 5.37 6.65 6.6t 6. 7t 6.26 4.95 3.4t 2.11 t.56 34.57 t6.04 50.6t 1/56 t2/70
35° 49', 83" 58' t5 t5 t5 t5 t5 t5 t5 15 t5 t5 t5 t5
t8 tO t9 t2 13 t6 t6 13 11 17 11 23 8 5 6
Memphis WB Airport 40 5954 t.90 2.26 4.t4 6.28 7.76 7.99 8.3t 7.62 5.82 4.47 2. 79 2.03 4t.97 t9.40 6t.37 t/56 t2/70
35• 3', 89" 58' t5 t5 t5 t5 t5 t5 t5 t5 t5 t5 t5 t5
22 8 20 t2 to 11 t2 11 16 13 t4 t7 6 6 5
Nashville WB Airport 40 6402 t.50 t.87 3.45 5.43 6.78 7.3t 7.52 6.87 5.14 3.72 2.t4 t.67 37.34 t6.07 53.4t t/56 t2/70
36° 7', 86° 40' t5 15 t5 t5 t5 15 t5 t5 t5 t5 t5 ts
3t 18 27 12 11 11 11 t2 t4 19 t4 t9 6 t2 5
* First line of data in the table for each station is mean evaporation in inches; second line is the number of years of record per month; and third line is the coefficient
of variation in percent (computed only when there are tO years or more of record during t956-1970). ·
** •••
****
Climatologicel Data (NOAA-EDIS)
Sum of monthly means •
Insufficient data between t956-70 to compute the coefficient of variation.
.....
(X)
TABLE Il --MONTHLY MEANS OF ESTIMATED "PAN EVAPORATION" COMPUTED FROM METEOROLOGICAL
MEASUREMENTS USING A FORM OF THE PENMAN EQUATION*
Station
State Index
Record Last
TEXAS
Abilene WSO
32" 25', 99° 40'
Amarillo WSO
35° 13', 101" 41'
Austin WB Airport
30° 18', 97" 41'
Brownsville WB Airport
25" 53', 97" 25'
Corpus Christi WB Airport
27" 46', 97" 30'
Dallas WSO
32° 51', 96" 51'
El Paso WB Airport
31° 48', 106" 23'
Fort Worth WSO
32" 49', 97" 3'
Houston WB City
29° 46', 95° 22'
Lubbock WB Airport
33" 38', 101" 49'
Midland WSO
31" 56', 102" 10'
No. No.** Jan
41
41
41
41
41
41
41
41
41
41
41
16
211
428
1136
2015
2244
2797
3283
4305
5411
5890
3.32
15
20
2.99
15
25
2.78
15
22
3.10
15
18
2.82
15
20
2. 72
15
24
3.86
15
18
2.66
15
24
2.91
15
23
3.19
14
20
3.48
15
22
Feb
3.45
15
18
3.22
15
25
3.26
15
17
3.54
15
22
3.35
15
22
3.13
15
17
5.02
15
8
3.12
15
14
3.39
15
12
3.54
15
26
3.93
15
18
Mar
6.04
15
25
5.65
15
31
5.20
15
18
5.60
15
13
5.37
15
13
5.24
15
25
8.23
15
16
5.13
15
29
5.03
15
17
5.67
15
27
6.75
15
20
Apr
7.80
15
20
8.26
15
18
5.99
15
14
7.01
15
16
6.38
15
13
6.56
15
17
11.51
15
5
6.39
15
18
5.85
15
12
8.46
15
12
9.17
15
12
May
9.61
15
18
10.77
15
17
7.67
15
16
8.37
15
12
7.35
15
17
8.10
15
18
Jun Jul
10.83 11.74
15 15
13 14
11.27
15
10
11.54
15
12
9.12 10.60
15 15
12 12
9.37
15
11
8.91
15
16
9. 72
15
11
10.30
15
10
10.11
15
12
11.31
15
11
14.25 14.83 13.22
15 15 15
6 5 6
7.80
15
19
7.39
15
8
10.05
15
11
8.38
15
12
10.24 11.02
15 15
13 6
11.24
15
12
11.79
14
7
11.30
15
12
8.64
15
8
10.89
15
11
11.92
15
12
Aug
10.78
15
10
10.30
15
10
9.68
15
12
9.01
15
10
9.24
14
11
10.34
15
10
11.82
15
8
10.53
14
12
7.81
15
13
9.64
15
7
11.04
15
10
Sep
7.39
15
20
7.67
15
17
7.00
15
13
6.89
15
12
6.98
15
12
7.23
15
16
9.23
15
13
7.16
15
19
6.50
15
13
7.33
15
16
7.90
15
13
Oct
5.95
15
18
6.51
15
22
5.35
15
18
5.57
15
17
5.76
15
12
5.61
15
14
7.16
15
12
5.36
15
16
5.38
15
14
6.08
15
16
6.33
15
18
Nov
4.03
15
20
3.91
15
22
3.57
15
22
4.11
15
19
4.01
15
17
3. 74
15
17
4.56
15
12
3.58
15
18
3.60
15
16
4.00
15
18
4.22
15
18
Dec
3.27
15
23
3.14
15
20
2. 78
15
23
3.23
15
20
3.13
15
18
3.07
15
16
3.52
15
12
2.82
15
16
2.84
14
16
3.12
15
16
3.42
15
17
May-Nov-Began
Oct*** Apr*** Annual*** Mo/Yr
56.30 27.91 84.21 1/56
8 12 8
58.06 27.17 85.23 1/56
8 13 8
49.42 23.58 73.00 1/56
12 8
49.51 26.60 76.11 1/56
6 11
48.63 25.06 73.54 1/56
8 10 8
52.30 24.45 76.76 1/56
12
70.52 36.70 107.22 1/56
3 5
52.57 23.69 76.50 1/56
10 12 10
44.09 23.61 67.38 1/56
10
55.21 27.89 83.15 1/56
5 11 6
60.11 30.97 91.12 1/56
6 11
Dsta
Mo/Yr
12/70
12/70
12/70
12/70
12/70.
12/70
12/70
12/70
12/70
12/70
12/70
* First line of data in the table for each station is mean evaporation in inches; second line is the number of years of record per·month; and third line is the coefficient
of variation in percent (computed only when there are 10 years or more of record during 1956-1970).
** Climatological Dsta (NOAA-EDIS)
*** Sum of monthly means.
**** Insufficient data between 1956-70 to compute the coefficient of variation.
.....
<0
TABLE II --MONTHLY MEANS OF ESTIMATED "PAN EVAPORATION" COMPUTED FROM METEOROLOGICAL
MEASUREMENTS USING A FORM OF THE PENMAN EQUATION*
Station Record Last
State Index May-Nov-Began Dsta
No. No.** Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Oct*** Apr*** Annual*** Mo/Yr Mo/Yr
TEXAS (continued)
Port Arthur WB Airport 41 7174 2.24 2.81 4.34 5.31 7.18 8.21 8.04 7.29 6.09 4.92 3.30 2.37 41.74 20.36 62.10 l/56 12/70
29° 58', 94° t• 15 15 15 15 15 15 15 15 15 15 15 15
18 18 12 12 tO 12 12 12 14 12 17 14 6 7 6
San Angelo WSO 41 7943 3.49 3.91 6.75 8.35 9.62 to. 79 tt.9t tt.t3 7.77 6.06 4.57 3.37 57.27 30.43 87.70 l/56 12/70
3t• 2t', too• 30' 15 15 15 15 15 15 15 15 15 15 15 15
19 18 25 14 14 t3 ll ll 18 17 36 19 7 8 6
San Antonio WSO 41 7945 2.96 3.55 5.55 6.29 7.80 9.72 10.94 10.16 7.38 5.44 3.74 2.98 51.43 25.07 76.50 l/56 12/70
29• 3t', 98. 28• 15 15 15 15 15 15 15 15 15 15 15 15
20 18 17 14 18 ll to ll 12 18 18 17 8 12 to
Victoria WB Airport 41 9364 3.07 3.41 5.03 5.93 7.12 8.tt 9.02 8.52 6.66 5.35 3.90 3.18 44.64 24.33 68.98 l/56 12/70
28• 5t', 96. 55' 12 12 12 12 12 12 ll 12 ll ll ll ll
19 18 12 12 12 14 ll 12 l3 17 17 14 7 8
Waco WB Airport 41 9419 2.88 3.29 5.41 6.45 7.74 9.90 tt.3t 10.63 7.51 6.14 3.94 3.00 53.23 24.96 78.19 l/56 12/70
31° 37', 97° 13' 15 15 15 15 15 15 15 15 15 15 15 15
22 18 24 17 14 13 13 12 17 22 18 20 to 12 to
Wichita Falls WSO 41 9729 2.60 3.17 5.32 7.00 8.22 9.90 tt.48 tt.05 7.53 5.64 3.86 2.82 53.81 24.77 78.58 t/56 12/70
33° 58', 98° 28' 15 15 15 15 15 15 15 15 15 15 15 15
29 24 31 17 16 12 12 ll 20 22 17 16 8 14 tO
UTAH
Salt Lske City WB Airport 42 7598 t.t4 t. 72 3.54 5.37 8.60 10.56 13.35 tt.2t 7.62 4.53 2.00 t.ot 55.87 14.78 70.65 l/56 12/70
40 ° 46. • ltt 0 58. 15 15 15 15 15 15 15 15 15 15 15 15
31 27 16 13 17 16 6 tO t3 t3 18 25 7 7 5
VERMONT
Burlington WSO 43 1081 0.68 0.90 1.62 3.06 4.56 5.65 5.96 5.17 3.15 2.20 1.21 0.73 26.69 8.21 35.02 t/56 12/70
44• 28', n• 8' 14 15 15 15 15 15 15 15 15 15 14 14
33 25 17 18 16 18 14 12 ll 18 23 25 6 l3 8
VIRGINIA
Lynchburg WSO 44 5120 1.71 t. 81 3.15 5.12 6.00 6.70 6.35 5.65 4.47 3.01 2.52 1.63 32.19 15.66 47.97 l/56 10/67
37° 19', 79° tt' tO to tO tO tO tO tO tO tO ll tO to
l3 12 18 17 ll 12 12 6 25 18 27 12 5 **** ****
* First line of data in the table for each station is mean evaporation in inches; second line is the number of years of record per month; and third line is the coefficient
of variation in percent (computed only when there are tO years or more of record during 1956-1970).
** Climatological Dsta (NOAA-EDIS)
*** Sum of monthly means.
**** Insufficient data between 1956-70 to· compute the coefficient of variation.
~ (continued)
Norfolk WSO
36° 52', 76" 11'
Richmond WSO
37° 30', 77° 19'
Roanoke WSO
37° 19', 79" 58'
Sterling R&D
38° 58', 77" 28'
WASHINGTON
CD Olympia WB Airport
C) 46° 58' 122" 53'
Seattle Tacoma WB
47" 26', 122° 18'
Spokane WB Airport
47° 37', 117" 31'
Tatoosh WB Airport
48" 22', 124° 43'
Yakima WB Airport
46" 34', 120° 31'
WEST VIRGINIA
Charleston WSFO
38" 22', 81° 36'
State
No.
44
44
44
44
45
45
45
45
45
46
Station
Index
TABLE II --MONTHLY MEANS OF ESTIMATED "PAN EVAPORATION" COMPUTED FROM METEOROLOGICAL
MEASUREMENTS USING A FORM OF THR PENMAN EOUATION*
May-Nov-
No.** Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Oct*** Apr***
6139
7201
7285
8084
6114
7473
7938
8332
9465
1570
2.05
15
18
1.66
15
18
2.09
15
16
1.45
10
27
0.64
15
36
1.15
15
17
0.61
15
33
1.62
11
23
0.75
15
44
1.37
15
24
2.31
15
16
2.03
15
14
2.40
15
16
1.84
10
20
1.20
15
37
1.57
15
26
1.11
15
26
1.56
11
23
1.39
15
31
1.67
15
14
3.96
15
14
3.51
15
18
3.95
15
19
3.35
10
18
1.87
15
18
2.30
15
18
2.28
15
18
2.06
11
23
2.91
15
16
2.99
15
20
5.78
15
17
5.36
15
14
5.34
15
16
4.67
10
18
2.75
15
16
3.18
15
13
4.04
15
17
2.50
11
18
4.48
15
16
4.41
15
12
6.90
15
10
6.64
15
10
6.27
15
8
5.77
10
12
4.01
14
18
5.08
15
18
6.28
15
16
3.24
11
18
6.58
15
12
5.46
15
12
7.52
15
11
7.12
15
12
6.60
15
10
6.57
10
6
4.63
13
16
5.80
15
16
7.82
14
12
3.37
10
26
7.83
15
13
5.68
15
10
7.47
15
10
7.06
15
11
6. 73
15
10
6.82
10
12
5.84
13
16
7.00
15
13
10.66
15
7
2.97
11
18
9.77
15
8
5.45
15
12
6.41
15
12
6.11
15
10
6.20
15
7
6.23
10
11
4.92
13
18
5.53
15
16
8.63
15
13
2.49
11
22
7.92
15
12
5.00
15
11
5.18
15
10
4.58
15
12
4.71
15
12
4.50
10
16
3.11
13
14
3.52
15
16
5.37
15
17
2.25
11
13
5.28
15
11
4.04
15
14
3.70
15
10
3.24
15
16
3.81
15
16
3.17
10
16
1.50
14
12
2.00
15
18
2.58
15
24
1.83
11
25
2.90
15
13
3.02
15
13
2.77
15
11
2.45
H
12
2. 74
15
12
2.18
10
13
0.76
15
19
1.23
15
26
0.92
15
24
1.59
10
25
1.32
15
20
1.97
15
18
2.20
15
12
1. 73
15
13
2.04
15
12
1. 51
10
17
0.51
15
42
1.02
15
23
0.51
15
30
1.21
11
37
o. 72
15
25
1.42
15
20
37.19 19.07
5 6
34.75 16.75
5 8
34.32 18.57
5
33.06 15.01
8
23.99 7.73
10 12
28.92 10.44
8 8
41.36 9.47
6 10
16.07 10.59
7 11
40.29 11.58
6 12
28.63 13.83
6
Record
Began
Annual*** Mo/Yr
56.25 1/56
5
51.50 1/56
5
52.89 1/56
5
48.06 1/61
6
31.73 1/56
8
39.36 1/56
6
50.83 1/56
5
26.66 1/56
6
51.87 1/56
6
42.45 1/56
6
Last
Data
Ho/Yr
12/70
12/70
12/70
12/70
12/70
12/70
12/70
12/66
12/70
12/70
* First line of data in the table for each station is mean evaporation in inches; second line is the number of years of record per 'month; and third line is the coefficient
of variation in percent (computed only when there are 10 years or more of record during 1956-1970).
** Climatological Data (NOAA-EDIS)
*** Sum of monthly means.
**** Insufficient data between 1956-70 to compute the coefficient of variation.
(X)
TABLE II --MONTHLY MEANS OF ESTIMATED "PAN EVAPORATION" COMPUTED FROM METEOROLOGICAL
MEASUREMENTS USING A FORM OF THE PENMAN EQUATION*
Station Record Last
State Index May-Nov-Be!!;an Data
No. No.** Jan Feb Mar Apr May Jun Jul Au!!: Sep Oct Nov Dec Oct*** Apr*** Annual*** Mo/Yr Mo/Yr
WEST VIRGINIA (continued)
Elkins WSO 46 2718 0.99 1.21 2.23 3.14 4.33 4.39 4 4 3 2 1 1 22 10 32 1/56 6/68
38° 55', 79° 49' 10 10 10 10 11 11 8 9 9 9 9 9
24 25 19 14 12 10 **** **** **** **** **** **** **** **** ****
WISCONSIN
Green Bay WSO 47 3269 0.62 0.81 1. 70 3.46 5.17 6.15 6.64 5.33 3.38 2.34 1.16 0.63 29.02 8.37 37.30 1/56 12/70
44° 28', sso 7' 14 15 15 15 15 15 15 15 15 15 15 15
24 29 30 18 12 12 12 12 12 25 19 25 7 13
La Crosse WSO 47 4370 0.74 1.03 1.99 4.31 6.15 6.95 7.26 6.11 3.85 3.20 1.45 0.80 33.43 10.08 43.36 1/56 9/68
43 ° 52.. 91 ° 15. 13 13 13 13 13 13 12 13 13 12 12 12
24 33 30 16 12 12 7 8 12 18 19 24 5 12
Madison WSO 47 4961 o. 74 1.00 1.99 3.75 5.34 6.69 6.86 5.80 3.63 2. 71 1.28 0.69 31.03 9.43 40.46 1/56 12/70
43° 7', 89° 19' 14 15 15 15 15 15 15 15 15 15 15 15
27 24 25 14 25 14 8 10 13 20 14 30 6 12
Mil waukee WSO 47 5479 0.85 1.09 2.01 3.82 5.57 6.70 7. 25 5. 96 4.04 2.88 1. 55 0.90 32.39 10.22 42.62 1/56 12/70
42 ° 56. • 87 ° 53. 15 15 15 15 15 15 15 15 15 15 15 15
24 26 30 14 18 13 13 12 11 19 13 19 7 12
WYOMING
Casper WSO 48 1570 1.85 1.92 3.03 4.73 6.92 8. 76 10.64 9.85 6.65 5.18 2.38 1.82 48.01 15.73 63.74 1/56 12/70
42° 55', 106° 28' 15 15 15 15 15 15 15 15 15 15 15 15
25 23 27 18 12 16 10 6 13 41 19 24 7 7 5
Cheyenne WSO 48 1675 2.42 2.41 3.32 5.26 7.01 8.16 9.23 8.61 6.18 4.77 2.95 2.51 43.96 18.87 62.83 1/56 12/70
41° 8, 104° 49' 15 15 15 15 15 15 15 15 15 15 15 15
23 23 24 19 14 18 12 10 12 20 14 18 8
Lander WB Airport 48 5390 1.09 1.51 2.84 4.25 6.42 7.98 9.87 9.05 5.63 3.55 1.53 1.11 42.50 12.33 54.83 1/56 12/70
42° 49', 1os· 43' 15 15 15 15 15 15 15 15 15 15 15 15
31 24 17 13 16 18 7 7 18 22 22 22 6 5 5
Sheridan WSO 48 8155 0.96 1.11 2.33 3.96 5.56 6.56 8.64 7.86 4.59 3.27 1.52 1.16 36.65 11.06 48.03 1/56 11/70
44° 46'. 106° 58' 15 13 15 14 14 14 14 15 14 15 15 14
41 27 23 18 20 19 11 10 20 20 20 38 7 6 5
* First line of data in the table for each station is mean evaporation in inches; second line is the number•of years of record per month; and third line is the coefficient
**
*** ****
of variation in percent (computed only when there are 10 years or more of record durin!'; 1956-1970).
Climatological Data (NOAA-EDIS)
Sum of monthly means.
Insufficient data between 1956-70 to compute the coefficient of variation.
ACKNOWLEDGMENTS
The authors extend appreciation to Don Haddock, editor of the NOAA-USDA Weekly
Weather and Cpop Bulletin, for his encouragement to put out this report; to
Don L. Myers and Dale Howell who assisted in tabulation; to Dale Howell for his
meticulous rechecking of the data; to Dr. Eugene Peck for suggestions and review
of the data; to Ruth Ripkin and Terry Whitehead for patience and perseverance in
typing tables; to Stephen Ambrose and Lianne Iseley for help with graphics and
photocopying; to NBI who, at the request of Dale Howell, assisted in transferring
all of the evaporation estimates from meteorological measurements from the NOAA
central computer to the NBI System 3000 word processor, resulting in a saving of
many hours.
REFERENCES
Farnsworth, R.K., Peck, E.L., and Thompson, E.S., 1982: Evaporation Atlas for
the Contiguous 48 States. NOAA Technical Report NWS 33, U.S. Dept. of
Commerce, Washington, D.C., 26 pp., 4 maps.
Hamon, R.W., Weiss, L.L., and Wilson, W.T., 1954: Insolation as an empirical
function of daily sunshine duration. Mon. Weather Rev., 82(6), pp. 141-146.
Hydrologic Branch, Division of Climatological and Hydrologic Services, 1950:
Mean Monthly and Annual Evaporation from Free Water Surface for the United
States, Alaska, Hawaii, and the West Indies. Technical Paper 13, u.s. Weather
Bureau, Washington, D.C., 10 pp.
Kohler, M.A., Nordenson, T.J., and Fox, W.E., 1955:. Evaporation from Pans and
Lakes. Research Paper 38, u.s. Weather _Bureau, Washington, D.C.
NOAA-EDIS, Climatological Data, published monthly by NOAA-EDIS on a state-by-
state basis except for New England, and Delaware and Maryland, which are
combined into regional publications. National Climatic Center, Asheville,
N.C.
NOAA-EDIS, Local Climatological Data, published monthly by NOAA-EDIS on a
station-by-station basis. National Climatic Center, Asheville, N.C.
NOAA-NWS, 1972: NWS Observing Handbook No. 2, Substation Observations.
Revised, NOAA, Washington, D.C., December 1972, 77 pp.
NOAA-NWS, 1979: Operations of the National Weather Service. U.S. Government
Printing Office, Washington, D.C., Stock No. 003-018-00098-9, 261 pp.
Penman, H.L., 1948: Natural evaporation from open water, bare soil and grass.
Proceedings of the Royal Society of London. Ser. A, Vol. 193, No. 1032,
pp 120-145.
Thompson, E.S., 1976: Computation of solar radiation from sky cover. Water
Resources Research, 12(5), pp. 859-865.
82
APPENDIX A
Example of Estimating Monthly Data for a Location with no Observed Data
In this example, steps for prorating data will be illustrated with some of the
problems caused by incomplete records. The basic steps are the following:
1. Determine annual (or seasonal) values for potential (FWS) evaporation from
the maps in the NOAA Technical Report NWS 33, Evaporation Atlas for the
Con~ous 48 United States.
2. Locate appropriate stations which have data in the tables of this report.
3. Determine monthly fractions of annual (or seasonal) evaporation for the
stations in the table by dividing the evaporation value for each month by
the annual (or seasonal) value.
4. Multiply the monthly fractions just determined by the annual (or seasonal)
value for the location of interest (as determined in step 1).
Suppose monthly mean potential evaporation is desired for Vaughn, New Mexico.
Vaughn is located in the southwest corner of Guadelupe County.
1. From map 3 in the NOAA Technical Report NWS 33, Evaporation Atlas for the
Contiguous 48 United States, the annual free water surface evaporation is
found to be between the 55 and 60 inch isopleths. A linear interpolation
would give approximately 58 inches. From map 2 the May-october evaporation
is 41 inches.
2. The nearest stations to Vaughn having data in the table are Alamogordo Dam
and Estancia. The elevation of Alamogordo Dam is between 4,000 and 4,500
feet. Vaughn is near 6,000 £eet, and Estancia is 6,100 feet. There are
only low hills between Estancia and Vaughn. Based on elevation and relief,
Estancia would be the logical selection to prorate monthly values. How-
ever, because of the high elevation and limited period of record, Estancia
has data only for the months from May to September. Because no annual (or
May to October) value is listed, we cannot determine the required ratios.
Santa Fe, found further north, is slightly higher and has some data for
all the months of the year. It should be noted that Estancia has about
12 years of record in the tables and Santa Fe has up to 36 years in the
summer and 17 years in the winter. Again, caution must be used in applying
these data. It seems reasonable that those years when Santa Fe does have
data in the winter are probably the milder years, and when the station
lacks data it is likely that the weather was too cold and pans were frozen
over during most of the winter period. If such is the case, then a true
mean would be less than that indicated by the 17 years of available data.
3. To better illustrate the distribution of evaporation in this area, ratios
of monthly to annual evaporation were computed for both Santa Fe and
Alamogordo Dam and are shown in table A1.
A-1
)>
I
1\')
Station
Alamogordo Dam
Santa Fe
Station
Alamogordo Dam
Santa Fe
Table A1
Monthly fractions of annual and seasonal evaporation at Alamogordo Dam and Santa Fe
% of Jan Feb Mar Apr May Jun Jul Aug ~ Oct Nov
Annual .035 .043 .078 .102 .121 .137 .130 .113 .093 .067 .045
May-oct .182 .207 .197 .171 .140 .102
Annual .022 .032 .058 .095 .134 .160 .142 .121 .104 .072 .037
May-oct .liB .218 .193 .164 .142 .100
Table A2
Monthly potential evaporation (FWS), in inches, at Vaughn, New Mexico, based on ratios (fraction) in table A1 and
on annual and seasonal values taken from maps in NOAA Technical Report ·~vaporation Atlas for the United States"
Dec
.035
.021
Totals of
Estimated
Period Jan Feb Mar Apr May Jun Jul Aug ~ Oct Nov Dec Monthly Values
Annual 2.9 2.5 4.5 5.9 7.0 8.0 7.5 6.6 5.4 3.9 2.6 2.0 58.8
May-oct 7.5 8.5 8.1 7.0 5.7 4.2 41.0
Annual 1.3 1.9 3.4 5.5 7.8 9.3 8.2 7.0 6.0 4.2 2.2 1.2 57.9
May-oct 7.5 8.9 7.9 6.7 5.8 4.1 36.9
4. Table A2 shows the monthly FWS evaporation at Vaughn resulting from
multiplying the annual FWS from Atlas map 3 by monthly fractions based on
the distributions at Alamogordo Dam and Santa Fe.
The evaporation estimates from table A2 are plotted in figure Al.
-"' .,
..c u .: -z
0 ....
~
1¥
0
~
~ w
>-_,
J: .... z
0
~
9
8
7
2
••• . ..
Monthly Evaporation
based on
• Santa Fe Annual
x Santa Fe May-October
+ Alamogordo Dam Annual
Alamogordo Dam May-October
•• • X • ••
high elevation .,... / •• ••
7 -•• • .. . .. -_. + ............... x··. ·"/ ~-:~··· ... I • •• -·~+ ~. I' x·· •
If +~···· .....
/ ~/ low elevation ~\. I/ +.
+ I' ~\\,
: \
i ~ . .
/ \ ~ \
.. +.,·.
.// . l+ + / \' / ... ·· · .. "'-+ . ' .. ..
/ ' ~ '·
JAN FEB MAR APR JUL
Figure Al. Monthly distribution at Vaughn, New Mexico based on evaporation
distribution at Alamogordo Dam and Santa Fe.
The annual values are connected by lines. It is readily apparent that stations
at higher elevations tend to have lower evaporation during the winter months and
a higher fraction of the annual evaporation during the summer than do the stations
at a lower elevation. Also apparent is a closer agreement of estimates based only
on May-october ratios. Since Vaughn is only a little lower than Santa Fe and
significantly higher than Alamogordo Dam, a reasonable decision would be to accept
either the value estimated from Santa Fe or to take values from the graph between
the values for the two sites but very near those for Santa Fe.
A-3
.U.S. GOVERNMENT PRINTING OFFICE• lti3-380·tt7/2AI2
(Continued from inside front cover)
NWS 16 Storm Tide Frequencies on the South Carolina Coast. Vance A. Myers, June 1975, 79 p. (COM-75-
11335)
NWS 17 Estimation of Hurricane Storm Surge in Apalachicola Bay, Florida. James E. Overland, June 1975.
66 P• (COM-75-11332)
NWS 18 Joint Probability Method of Tide Frequency Analysis Applied to Apalachicola Bay and St. George
Sound, Florida. Francis P. Ho and Vance A. Myers, November 1975, 43 p. (PB-251123)
NWS 19 A Point Energy and Mass Balance Model of a Snow Cover. Eric A. Anderson, February 1976, 150 p.
(PB-254653)
NWS 20 Precipitable Water OVer the United States, Volume 1: Monthly Means. George A. Lott, November
1976, 173 P• (PB-264219)
NWS 20 Precipitable Water OVer the United States, Volume II: Semimonthly Maxima. Francis P. Ho and
John T. Riedel, July 1979, 359 p. (PB-300870)
NWS 21 Interduration Precipitation Relations for Storms-Southeast States. Ralph H. Frederick, March
1979, 66 P• (PB-297192)
NWS 22 The Nested Grid Model. Norman A. Phillips, April 1979, 89 p. (PB-299046)
NWS 23 Meteorological Criteria for Standard Project Hurricane and Probable Maximum Hurricane and
Probable Maximum Hurricane Windfields, Gulf and East Coasts of the United States. Richard w.
Schwerdt, Francis P. Ho, and Roger R. Watkins, September 1979, 348 p. (PB-80 1.17997)
NWS 24 A Methodology for Point-to-Area Rainfall Frequency Ratios. Vance A. MYers and Raymond M. Zehr,
February 1980, 180 P• (PB80 180102)
NWS 25 Comparison of Generalized Estimates of Probable Maximum Precipitation With Greatest Observed
Rainfalls. John T. Riedel and Louis C. Schreiner, March·1980, 75 p. (PB80 191463)
NWS 26 Frequency and Motion of Atlantic Tropical Cyclones. Charles J. Neumann and Michael J. Pryslak,
March 1981, 64 P• (PB81 247256)
NWS 27 Interduration Precipitation Relations for Storms--Western United States. Ralph H. Frederick,
John F. Miller, Francis P. Richards, and Richard w. Schwerdt, September 1981, 158 p. (PB82 230517)
NWS 28 GEM: A Statistical Weather Forecasting Procedure. Robert G. Miller, November 1981, 103 p.
NWS 29 Analyses of Elements of the Marine Environment for the Atlantic Remote Sensing Land Ocean
Experiment (ARSLOE)--An Atlas for October 22 Through October 27, 1980. Lawrence D. Burroughs,
May 1982, 116 P• (PB82 251281)
NWS 30 The NMC Spectral Model. Joseph G. Sela, May 1982, 38 P• (PB83 115113)
NWS 31 A Monthly Averaged Climatology of Sea Surface Temperature. Richard w. Reynolds, June 1982, 37 p.
(PB83 115469)
NWS 32 Pertinent Meteorological and Hurricane Tide Data for Hurricane Carla. Francis P. Ho and John F.
Miller, August 1982, 111 P• (PB83 118240)
NWS 33 Evaporation Atlas for the Contiguous 48 United States. Richard K. Farnsworth, Edwin S. Thompson,
and Eugene L. Peck, June 1982, 26 p.
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