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A tornado is a violently rotating column of air extending from the base of a thunderstorm to the ground, often made visible by a funnel or cone shaped cloud.

A tornado occurs when rolling air called wind shear is turned vertical by a thunderstorm. This creates a supercell, a storm with a strong, rotating updraft called a mesocyclone.

Under the right conditions a downdraft can wrap around the mesocyclone, forcing the rotating into a tighter, more intense vortex: a tornado.

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14y ago

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