National Renewable Energy Laboratory (NREL) publishes a wind survey map of the United States (AWS Truewind). According to this 80m survey there are 11 states with potential class 3 wind resources in the Midwest. Thirty-eight cities were identified in the aforementioned states with average annual wind speeds of 5.6 m/s (12mph) or greater. These thirty-eight cities occupy approximately fifteen-thousand square miles of land area.
If sixteen 30kw wind turbines per square mile could be installed within the boundaries of these municipalities, a potential 12,000 million Kwh per year could be added to the grid using existing infrastructure. That's enough energy to fully charge 2.7 million Electric Vehicles 12Kwh once everyday for a year, until the end of civilization. For further details visit http://www.ccwindart.com/mcwp