Funnel cloud
Funnel-shaped cloud not touching the ground / From Wikipedia, the free encyclopedia
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"Funnel Cloud" redirects here. For the Hem album, see Funnel Cloud (album).
A funnel cloud is a funnel-shaped cloud of condensed water droplets, associated with a rotating column of wind and extending from the base of a cloud (usually a cumulonimbus or towering cumulus cloud) but not reaching the ground or a water surface.[1] A funnel cloud is usually visible as a cone-shaped or needle like protuberance from the main cloud base. Funnel clouds form most frequently in association with supercell thunderstorms, and are often, but not always, a visual precursor to tornadoes. Funnel clouds are visual phenomena, but these are not the vortex of wind itself.[2]
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