South Dakota Weather

Why Is South Dakota Always So Windy?
Why Is South Dakota Always So Windy?
Why Is South Dakota Always So Windy?
The above question has gone through my mind several times. And as South Dakota natives we experience it seems more windy days than calm in any given year. But why do we always get the windy weather? What causes the crazy wind tunnel above our neck of the woods all the time or so it seems...