How Do Tornadoes Form?
10. The Death of a Tornado
Most tornadoes will last for less than 10 minutes; some will even last for only a few seconds. Some, however, can last for as long as an hour, but these are rare. Regardless, they are generally very destructive for as long as they do touch down to the surface.
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We don’t yet have a complete picture of how or why tornadoes eventually die out, but one potential cause is that the tornado moves over cooler ground. Another possibility is that the cloud itself begins to break apart. This makes them difficult to predict, and they will often disappear just as suddenly as they first formed.
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