Watch This Insanely Terrifying Supercell Thunderstorm

It looks like a flying saucer made of angry clouds is about to devour Missouri.

Of the four different categories of thunderstorm, supercell is the worst. A rare confluence of warm air and precipitation creates a mesocyclone vortex, a swirling juggernaut of a storm that produces huge quantities of hail and roars by at over 100 miles per hour, affecting the land for miles and miles. And this timelapse video shows one taking shape and letting loose its fury.

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