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Wind Data

These datasets detail the wind resource available in the United States.

50-m Data (Height above Ground/Surface)

These datasets are geographic shapefiles generated from original raster data, which varied in resolution from 200-m to 1,000-m cells. The data provide an estimate of annual average wind resource for states and regions. The data are separated into two groups: NREL-produced and AWS Truepower-produced/NREL-validated.

The NREL-produced map data only apply to areas of low surface roughness (e.g., grassy plains) and exclude areas with slopes greater than 20%. For areas of high surface roughness (e.g., forests), the values shown may need to be reduced by one or more power classes.

The Truepower-produced resource estimates factor in surface roughness in their calculations and do not exclude areas with slopes greater than 20%. These data were produced in cooperation with the U.S. Department of Energy WINDExchange program and have been validated by NREL and other wind energy meteorological consultants. To download state wind resource maps, visit the WINDExchange site.

Areas designated Class 3 or greater are suitable for most utility-scale wind turbine applications, whereas class 2 areas are marginal for utility-scale applications but may be suitable for rural applications. Class 1 areas are generally not suitable, although a few locations (e.g., exposed hilltops not shown on the maps) with adequate wind resource for wind turbine applications may exist in some Class 1 areas. The degree of certainty with which the wind power class can be specified depends on three factors: the abundance and quality of wind data, the complexity of the terrain, and the geographical variability of the resource. A certainty rating was assigned to each grid cell based on these three factors and is included in the Wind Energy Resource Atlas of the United States.

Classes of Wind Power Density at 10 m and 50 ma
Wind Power
Class
10 m (33 ft) 50 m (164 ft)
Wind Power Density
(W/m2)
Speedb m/s (mph) Wind Power Density
(W/m2)
Speedb m/s (mph)
1 0 0 0  
100 4.4 (9.8) 200 5.6 (12.5)
2
150 5.1 (11.5) 300 6.4 (14.3)
3
200 5.6 (12.5) 400 7.0 (15.7)
4
250 6.0 (13.4) 500 7.5 (16.8)
5
300 6.4 (14.3) 600 8.0 (17.9)
6
400 7.0 (15.7) 800 8.8 (19.7)
7
1000 9.4 (21.1) 2000 11.9 (26.6)
  1. Vertical extrapolation of wind speed based on the 1/7 power law.
  2. Mean wind speed is based on Rayleigh speed distribution of equivalent mean wind power density. Wind speed is for standard sea-level conditions. To maintain the same power density, speed increases 3%/1000 m (5%/5000 ft) elevation.

NOTE: Each wind power class should span two power densities. For example, Wind Power Class = 3 represents the Wind Power Density range between 150 W/m2 and 200 W/m2. The offset cells in the first column attempt to illustrate this concept.

The available datasets are 50-meter hub height state and regional coverage. A 50-meter national coverage is not available, nor is high-resolution land-based data for Alabama, Florida, Louisiana, or Mississippi.

Geographic Coordinate System Name: GCS_WGS_1984
Coverage Files Last Updated Metadata KMZ Files
Alaska Wind 50m height Zip 187.3 MB 04/25/2012 Alaska.htm AK 50m.kmz
Arizona Wind 50m height Zip 14.3 MB 03/09/2009 Arizona.htm AZ 50m.kmz
Arkansas Wind 50m height Zip 2.3 MB 05/18/2012 Arkansas.htm AR 50m.kmz
California Wind 50m height Zip 29.2 MB 05/18/2012 California.htm CA 50m.kmz
Colorado Wind 50m height Zip 16.2 MB 02/25/2009 Colorado.htm CO 50m.kmz
Connecticut Wind 50m height Zip 1.1 MB 03/02/2009 Connecticut.htm CT 50m.kmz
Georgia Wind 50m height Zip 1.4 MB 05/11/2012 Georgia.htm GA 50m.kmz
Hawaii Wind 50m height Zip 2.0 MB 05/04/2009 Hawaii.htm HI 50m.kmz
Illinois Wind 50m height Zip 790 KB 02/05/2009 Illinois.htm IL 50m.kmz
Indiana Wind 50m height Zip 2.7 MB 03/02/2009 Indiana.htm IN 50m.kmz
Iowa Wind 50m height Zip 2.2 MB 05/21/2012 Iowa.htm IA 50m.kmz
Kansas Wind 50m height Zip 11.5 MB 11/23/2009 Kansas.htm KS 50m.kmz
Kentucky Wind 50m height Zip 1.8 MB 03/07/2017 Kentucky.htm KY 50m.kmz
Maine Wind 50m height Zip 6.4 MB 03/02/2009 Maine.htm ME 50m.kmz
Massachusetts Wind 50m height Zip 2.6 MB 03/02/2009 Massachusetts.htm MA 50m.kmz
Michigan Wind 50m height Zip 11.6 MB 03/02/2009 Michigan.htm MI 50m.kmz
Mid-Atlantic Regional Wind 50m height
  • Delaware
  • Maryland
  • New Jersey
  • North Carolina, Pennsylvania
  • Virginia
  • West Virginia
  • District of Columbia
Zip 17.5 MB 05/21/2012 Mid Atlantic Regional.htm Mid Atlantic 50m.kmz
Minnesota Wind 50m height Zip 1.3 MB 06/26/2012 Minnesota.htm MN 50m.kmz
Missouri Wind 50m height Zip 9.8 MB 03/02/2009 Missouri.htm MO 50m.kmz
Nebraska Wind 50m height Zip 18.3 MB 02/23/2009 Nebraska.htm NE 50m.kmz
Nevada Wind 50m height Zip 16.7 MB 05/18/2012 Nevada.htm NV 50m.kmz
New England Regional Wind 50m height
  • Connecticut
  • Maine
  • Massachusetts
  • New Hampshire
  • Rhode Island
  • Vermont
Zip 3.2 MB 09/30/2010 New England Regional.htm NE Regional 50m.kmz
New Hampshire Wind 50m height Zip 2.2 MB 03/02/2009 New Hampshire.htm NH 50m.kmz
New Mexico Wind 50m height Zip 24.6 MB 05/18/2012 New Mexico.htm NM 50m.kmz
New York Wind 50m height Zip 3.3 MB 05/22/2012 New York.htm NY 50m.kmz
North and South Dakota Wind 50m height Zip 2.3 MB 03/17/2009 North and South Dakota.htm ND and SD 50m.kmz
Ohio Wind 50m height Zip 3.2 MB 03/02/2009 Ohio.htm OH 50m.kmz
Oklahoma Wind 50m height Zip 11.0 MB 06/04/2009 Oklahoma.htm OK 50m.kmz
Pacific Northwest Regional Wind 50m height
  • Idaho
  • Montana
  • Oregon
  • Washington
  • Wyoming
Zip 53.7 MB 06/11/2012 Pacific Northwest Regional.htm PNW 50m.kmz
Puerto Rico and Virgin Islands Wind 50m height Zip 117 KB 04/01/2009 Puerto Rico and Virgin Islands.htm PR and VI 50m.kmz
Rhode Island Wind 50m height Zip 623 KB 02/20/2009 Rhode Island.htm RI 50m.kmz
South Carolina Wind 50m height Zip 1.5 MB 05/18/2012 South Carolina.htm SC 50m.kmz
Tennessee Wind 50m height Zip 321 KB 03/02/2009 Tennessee.htm TN 50m.kmz
Texas Wind 50m height Zip 321 KB 06/22/2012 Texas.xml TX 50m.kmz
Utah Wind 50m height Zip 16.4 MB 05/18/2012 Utah.htm UT 50m.kmz
Vermont Wind 50m height Zip 2.2 MB 05/18/2012 Vermont.htm VT 50m.kmz
Wisconsin Wind 50m height Zip 3.5 MB 06/26/2012 Wisconsin.xml WI 50m.kmz
United States Wind Power Class - no exclusions Zip 22,771 KB 08/20/2015
United States Wind Power Class - with exclusions Zip 74,225 KB 08/20/2015

These datasets can be viewed via Google Earth. To do so, choose a KMZ link above.

90-m Offshore Data (Height Above Surface)

These data detail annual average offshore wind speed at a 90-meter height. To learn more, see Assessment of Offshore Wind Energy Resources for the United States.

Geographic Coordinate System Name: GCS_WGS_1984
Coverage File Last Updated Metadata KMZ File
Atlantic Coast 90-m Windspeed Offshore Wind Zip 19.7. MB 06/26/2012 Atlantic Coast.htm Atlantic Coast 90m.kmz
Great Lakes 90-m Windspeed Offshore Wind Zip 11.8 MB 08/23/2010 Great Lakes.htm Great Lakes 90m.kmz
Gulf of Mexico 90-m Windspeed Offshore Wind Zip 4.8 MB 08/23/2010 Gulf of Mexico.htm Gulf of Mexico 90m.kmz
Hawaii 90-m Windspeed Offshore Wind Zip 4.2 MB 08/23/2010 Hawaii.htm Hawaii 90m.kmz
Pacific Coast 90-m Windspeed Offshore Wind Zip 9.4 MB 08/23/2010 Pacific Coast.htm Pacific Coast 90m.kmz

These datasets can be viewed via Google Earth. To do so, choose a KMZ link above.

These zipped shapefile datasets are designed to be used in GIS software applications.

Wind Developer Network

Developer Network.  Access data and analysis services that provide access to wind resource data and NREL models.

Western Wind Dataset

The Western Wind Dataset provides energy professionals with a consistent set of wind profiles across the western United States. This dataset provides 10-minute time-series wind data for 2004, 2005, and 2006. More than 30,000 data points are available across the western United States.

Eastern Wind Dataset

The Eastern Wind Dataset provides energy professionals with a consistent set of wind profiles for the eastern United States. This dataset provides 10-minute time-series wind data for 2004, 2005, and 2006. More than 1,326 simulated wind farm data points are available across the eastern United States.

Wind Integration National Dataset Toolkit

The Wind Integration National Dataset Toolkit is an update and expansion of the Eastern Wind Integration Data Set and Western Wind Integration Data Set. It supports the next generation of wind integration studies.

National Wind Technology Center Tower Data

The National Wind Technology Center Tower Data includes live graphical displays and wind data from a tower located at NREL’s National Wind Technology Center.