Waterspout: A rapidly rotating column of air, funnel-shaped or tubular, extending from the base of a cumulus or cumulonimbus cloud down to the surface of an ocean or lake and usually comparable in ...
Cold-air funnel: A rotating funnel cloud that develops from the base of cumulus clouds or weak showers or thunderstorms when the air aloft is unusually cold. Usually weak and short-lived, they rarely ...
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