funnel cloud

Noun

 * 1)  A tapering, rapidly rotating cloud descending from a larger storm cloud, indicating the presence of an intense vortex. A tornado is a funnel cloud which reaches the ground.
 * When we saw the funnel cloud, we headed for the basement.

Translations

 * Finnish: suppilopilvi
 * Italian: nube ad imbuto
 * Thai: เมฆงวง