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Wind Maps

Wind Prospector

This GIS application supports resource assessment and data exploration for wind development.

This collection of wind maps and assessments details the wind resource in the United States.

If you have difficulty accessing these maps because of a disability, contact the Geospatial Data Science Team.

National Wind Resource Assessment

The national wind resource assessment was created for the U.S. Department of Energy in 1986 by the Pacific Northwest Laboratory and is documented in the Wind Energy Resource Atlas of the United States, October 1986. This national wind resource data provides an estimate of the annual average wind resource for the conterminous United States, with a resolution of 1/3 degree of latitude by 1/4 degree of longitude.

The wind resource assessment was based on surface wind data, coastal marine area data, and upper-air data, where applicable. In data-sparse areas, three qualitative indicators of wind speed or power were used when applicable: topographic/meteorological indicators (e.g. gorges, mountain summits, sheltered valleys); wind-deformed vegetation; and eolian landforms (e.g. playas, sand dunes). The data were evaluated at a regional level to produce 12 regional wind resource assessments; the regional assessments were then incorporated into the national wind resource assessment.

The conterminous United States was divided into grid cells 1/4 degree of latitude by 1/3 degree of longitude. Each grid cell was assigned a wind power class ranging from 1 to 6, with 6 being the windiest. Each grid cell contains sites of varying power class. The assigned wind power class is representative of the range of wind power densities likely to occur at exposed sites within the grid cell. Hilltops, ridge crests, mountain summits, large clearings, and other locations free of local obstruction to the wind will be well exposed to the wind. In contrast, locations in narrow valleys and canyons, downwind of hills or obstructions, or in forested or urban areas are likely to have poor wind exposure.


Wind Speed Maps

U.S. Annual Average Wind Speed at 30 m

State maps are available on the WINDExchange website.



Wind Resource Maps

U.S. 80-m Wind Resource: Land

Additional 80-m maps using higher-resolution data are available from the WINDExchange and U.S. Department of Energy Wind Energy Technologies Office websites.


U.S. 80-m Wind Resource: Land and Offshore

Additional 80-m maps using higher-resolution data are available from the WINDExchange and U.S. Department of Energy Wind Energy Technologies Office websites.