A Fall of a Funnel

Описание: I was just outside of Forest City, IA, when I caught sight of a cold air funnel cloud just beginning to detach from a cumulus cloud before dissipating. Cold air funnel clouds occur when the air above warm air is unusually cold; it can be a bubble of cold air in the middle of warmer air, which is detectable on temperature radar. Cold air funnel clouds are normally harmless, although very few can touch down as tornadoes, usually reaching the damaging potential of an EF-0 tornado.

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