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How Do Thunderstorms Form?

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Thunderstorms
How Do Thunderstorms Form?

A mature thunderstorm, with anvil top.

NOAA National Weather Service

Whether you happen to be a spectator or a "spook," chances are you've never mistaken the sight or sounds of an approaching thunderstorm. And it's no wonder why. Over 40,000 occur worldwide every day. Of that total, 10,000 occur daily in the United States alone.

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