This map shows the highest wind supply in Indiana are found across the northern half of the state. Class 3 areas are positioned across the north-central region of Indiana with the largest continuous area being northwest of Lafayette and northwest of Indianapolis. Other Class 3 areas are located east of Muncie. Particular regions in the Class 3 areas could have higher wind power class values at 80 m than shown on the 50-m map because of possible high wind shear. Given the advances in technology, a number of areas in the Class 3 areas may be suitable for large scale wind development.

A source of clean energy, airstream is organized according to wind power classes, which are made from average air velocity. These classes vary from Class 1 (the slowest) to Class 7 (the peak). On the whole, at 50 meters , windpower Class 4 or higher is effective for producing wind power with larger turbines. Class 4 and above are deemed excellent resources. Special areas in the Class 3 areas could have superior wind power classes at 80 meters than displayed on the 50 meter map as a consequence of potential elevated wind shear. Because of the improvements in technology, some locations in the Class 3 regions may appropriate for large scale wind power company development.