This diagram shows the highest wind supply in Ohio are found across the northwestern one-third of the map. Class 3 areas concentrated near Lake Erie with the largest continuous area extending from Sandusky towards Toledo. Other Class 3 areas are located northwest of Columbus on relatively high elevations. Particular regions in the Class 3 areas could have higher wind power class values at 80-m than shown on the 50-m chart because of possible high wind shear. Given the advances in technology, a number of regions in the Class 3 areas may be suitable for utility-scale wind development.

As a renewable resource, airstream is categorized according to wind power classes, these are made from average wind velocity. The classes span from Class 1 (the slowest) to Class 7 (the peak). In general, at 50 meters , wind speed Class 4 or greater can be effective for making wind power with big turbines. Class 4 and above are deemed excellent energy supplies. Special areas in the Class 3 regions could have superior wind power classes at 80 meters than displayed on the 50 meter map due to potential high wind shear. Because of the improvements in machinery, some locations in the Class 3 zones may appropriate for utility-scale wind power development.