MOTW #87

These maps are "wind speed grids" for New England. The heights (30m, etc) in the upper corners are the height at which the wind speeds were measured. This study was done by Truewind Solutions to get an idea of how much wind power can be derived from wind turbines of different heights and locations.
If you really want the whole in depth analysis you can go to the Mass. Technology Collaborative and get a detailed wind map for areas within souther New England.