Can Giant Walls Deter The Formation Of Destructive Tornadoes?

Tornados in the Midwestern and Southern United States have always been a troubling yet fascinating phenomenon - just think of Dorothy's whirlwind adventure in the Wizard of Oz! Occurring predominantly in the area east of the Rocky Mountains dubbed 'Tornado Alley', they form during severe thunderstorms called supercells that occur when cold dry polar air comes in contact with warm moist tropical air.