Wind Powering America: State Wind Resource Maps
apps2.eere.energy.gov/wind/windexchange/wind_maps.asp
From the page
Saved with the link. Notes from 2007 to 2016 are mostly the page's own words, so this is probably an excerpt.
One of Wind Powering America's key activities for states is to provide validated state wind maps. Below is a color-coded map, which indicates which states have validated wind resource maps, which states are planned, and other wind maps that have not been