Sit in a swivel chair and hold your arms out. Now have someone spin you around. As you spin bring your hands to your lap. The scientific term for this spinning up is conservation of angular momentum. Everything has to come together just right for a tornado to occur.
More tornadoes occur in the United States than any other place in the world.
Alabama ranks 4th in the nation for the number of killer tornadoes, and the risk of tornadoes is higher in the Tennessee Valley. Texas and Oklahoma have many more tornadoes than we do, here in the Tennessee Valley, ours tend to be more deadly. The worst tornado disaster occurred on March 21, 1932. Over 300 people were killed in the state during 2 waves of tornadoes that day. You have probably asked yourself that question at least once while watching an approaching storm.