How do tornadoes work?

Tornadoes start out with severe thunderstorms called
supercells. They form when polar air comes in contact with
tropical air in a very unstable atmosphere. Supercells contain a
rotating updraft of air that is known as a mesocyclone, which
keeps them going for a long time. High winds add to the
rotation, which keeps getting faster and faster until eventually
it forms a funnel. The funnel cloud creates a sucking area of
low pressure at the bottom. As soon as this funnel comes in to
contact with the Earth, you have a tornado.


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