r than two hundred and five miles per hour, they can last about an hour, and have seventy percent of all deaths from tornadoes.Variations. Some variations of tornadoes are that they can be found in the early stages of rapidly developing thunderstorms. This type of tornado is most common along the range of the Rocky Mountains, the Plains, and the Western States. Tornadoes may appear nearly transparent until dust and debris are picked up. Occasionally, two or more tornadoes may occur at the same time.Another type of tornado is known as a waterspout. This is a weak tornado that forms over warm water. They are most common along the Gulf Coast and southeastern states. In the western United States, they occur with cold late fall or late winter storms, during a time when you least expect it to develop. They occasionally move inland becoming tornadoes that can cause a great deal of damage and many injuries.Average Tornado. The average tornado moves from southwest to northeast, but they have been known to move in any direction. The average forward speed is about thirty miles per hour but can vary from that to seventy before it really gets going.Frequency Of Tornadoes. Tornadoes can occur at any time of the year. In the southeastern states, peak tornado occurrence is March through May, while peak months in the northern states are during the summer months. They are most likely to occur between three and nine o'clock p.m. but have been known to occur at all hours of the day or at night.Where Tornadoes Come From:Energy. Tornadoes come from the energy released in a thunderstorm. As powerful as they are, tornadoes account for only a tiny fraction of the energy in a thunderstorm. What makes them dangerous is that their energy is concentrated in a small area, perhaps only a hundred yards across. Not all tornadoes are the same, of course, and science does not yet completely understand how part of a thunderstorm's energy sometimes gets focused into someth...
