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A diagram showing the contributing weather systems to Tornado Alley in the United States, a loosely-defined area that is prone to tornadoes. Tornadogenesis is the process by which a tornado forms. There are many types of tornadoes, varying in methods of formation.
Tornadoes can occur anywhere in the U.S., according to the National Weather Service.Tornadoes are “most common in the central plains east of the Rocky Mountains and west of the Appalachians.”
The reason for the peak period for tornado formation in North America being skewed toward spring has much to do with temperature patterns in the U.S. Tornadoes often form when cool, polar air traveling southeastward from the Rocky Mountains overrides warm, moist, unstable Gulf of Mexico air in the eastern states. Tornadoes tend to be commonly ...
These tornadoes may form at different times or exist simultaneously but are separate from one another. A phenomenon similar to multiple vortices is the satellite tornado . Unlike the multiple-vortex tornado, where smaller vortices form inside the main tornado, a satellite tornado develops outside the main tornado's circulation.
How do tornadoes form? These vicious columns of air are formed from severe thunderstorms, which swoop close to the ground. The main ingredients to a tornado are warm air and cool air.
Only a tornado in Greenfield had officially been confirmed, by 3 p.m. Wednesday. National Weather Service crews doing an initial survey reported at least EF3 level damage from the tornado in ...
Tornadoes occurring in these conditions are especially dangerous, since only weather radar observations, or possibly the sound of an approaching tornado, serve as any warning to those in the storm's path. Most significant tornadoes form under the storm's updraft base, which is rain-free, [36] making them visible. [37]
Two tornadoes that look almost the same can produce drastically different effects. Also, two tornadoes that look very different can produce similar damage, because tornadoes form by several different mechanisms and also follow a lifecycle that causes the same tornado to change in appearance over time. People in the path of a tornado should ...