Areas with the Highest Wind Potential in the U.S.

As you can see, the region with the greatest wind resources in the U.S. is the midwest. In fact, the GAO states that:

The nation's wind potential--particularly in areas with frequent, strong winds needed to generate electricity from wind power--remains largely untapped. According to a DOE study, the Midwest, including the Great Plains, theoretically has more than enough potential wind energy to fulfill the entire nation's electricity needs. Specifically, just three wind-rich states--North Dakota, Texas, and Kansas--could accomplish this.

Among the eastern states, Pennsylvania appears to be the state with the greatest wind resources. In the map, it appears as if about two thirds of Pennsylvania has moderate and good resources. This means that it is not due to lack of wind resources that Pitt has yet to purchase renewable energy.