Check out "Wind Prospector", which has a zoomable map and a wind model for the entire United States.[1] It uses a climatic model and topography data to calculate wind power potential. Spend a few minutes with that and you can see where the wind industry can and can't grow. For the US, the big potential is offshore and in the area due north of the Texas panhandle. California has four good onshore wind sites, and all have big wind farms already.