Your map ignores the coastal zone, as shown in a comparable map (for the 50m height): https://www.nrel.gov/gis/images/US-50m-wind-power-map.jpg https://www.nre

Your map ignores the coastal zone, as shown in a comparable map (for the 50m height): https://www.nrel.gov/gis/images/US-50m-wind-power-map.jpg https://www.nrel.gov/gis/images/US-50m-wind-power-map.jpg Most of that offshore zone is on the continental shelf.