How Do Tornadoes Form?
9. Hail
Tornadoes are destructive, thanks largely to their high winds that can down trees, tear roofs off houses and, in some cases, destroy houses completely. If that was not enough, some will also cause golf-ball-sized lumps of ice to fall down to Earth at high velocity a phenomenon known as hail.
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When sufficient water is being taken up into clouds that are suitably cold at higher elevations, the water in the cloud can become frozen. Often, this will begin to descend and melt on the way, only to be lifted by the updraft again where the process is restarted, creating increasingly large hail until it does fall to Earth.
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