This site gives a rough idea of wind speed in your area, based on address, using Google maps. Please note that determination of likely energy output of a wind system is extremely site-specific; that is, prevailing conditions at the specific site in question are far more important to this evaluation than wide-area maps like those linked below. For example, potential sites only a few hundred meters apart can have very different energy production potential, based on differences in surface terrain, nearby obstructions, wind flow patterns and prevailing wind direction. There is no substitute for real data, collected on-site by an anemometer placed on a tower at the proposed turbine height.