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funnel cloud

a rapidly rotating funnel-shaped cloud extending downward from the base of a cumulonimbus cloud, which, if it touches the surface of the earth, is a tornado or waterspout.
Also called pendant cloud, tornado cloud, tuba.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples for funnel cloud
  • Water droplets from the mesocyclone's moist air form a funnel cloud.
  • The mesocyclone can eventually form a stormy funnel cloud, which becomes a tornado when it touches down.
  • If a cold air funnel is spotted, take the same precautions you would for any funnel cloud or tornado.
  • They can appear without warning and be invisible until dust and debris are picked up or a funnel cloud appears.
  • Tornadoes are storms with rapidly rotating winds that form a funnel cloud.
  • The first image shows the funnel cloud, while the next two show the tornado.
  • They can appear suddenly without warning and can be invisible until dust and debris are picked up or a funnel cloud appears.
  • The disaster warning system will be activated when a tornado or funnel cloud is reported.
British Dictionary definitions for funnel cloud

funnel cloud

a whirling column of cloud extending downwards from the base of a cumulonimbus cloud: part of a waterspout or tornado
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Contemporary definitions for funnel cloud

a funnel-shaped cloud descending from a towering cumulus or cumulonimbus that, if it reaches the ground, becomes a tornado

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