This diagram explains that Montana has wind resources suitable with utility-scale wind power generation. Good and excellent wind resource areas are distributed throughout the eastern two-thirds of Montana. The region just east of the Rocky Mountains in northern Montana has exceptional-to-superb wind resource, with other outstanding supply areas being positioned on the hills and ridges between Great Falls and Havre. The region between Billings and Bozeman also has exceptional wind resource areas. Ridge crest locations have the highest windpower in the western one-third of Montana.

A renewable energy source, airstream is organized according to wind power classes, these are created from average airstream velocity. The classes span from Class 1 (the slowest) to Class 7 (the top). On the whole, at 50 meters , wind speed Class 4 or higher is practical for producing wind energy with larger turbines. Class 4 and above are deemed high-quality energy supplies. Particular locations in the Class 3 regions may perhaps have greater wind power classes at 80 meters than exposed on the 50 meter map as a consequence of potential elevated wind shear. Due to the improvements in equipment, a number of locations in the Class 3 regions may appropriate for utility-scale wind power company development.