Tornado Alley
A tornado is a violent, rotating column of air. ... The breeding ground for tornadoes in the United States is Tornado Alley. Tornado alley is the nickname for the part of the central US where tornadoes and twisters are most common. ... This mist with cool westerly winds from the Pacific makes for perfect conditions for a tornado. ... A tornado of level F0 reaches speeds of 40 to 72 mph, it is relatively harmless, causing only light damage such as tree branches being broken off and sign boards damaged. ... The highest tornado ever recorded was F5 and reached speeds from 261 to 318 mph. This type of tornado causes incredible damage, it debarks trees, lifts frame houses off foundations and carries it a considerable distance to disintegrate and throws automobiles incredible distances.