Una nube embudo es una nube en forma de embudo de gotas de agua condensada, asociada con una columna rotativa de aire, extendiéndose desde la base de una nube madre (usualmente una nube cumulonimbus o en torre, una cúmulus) y lo que alcanza el suelo o el agua es el vórtice. Una nube embudo se hace visible como un cono o una aguja saliendo como una protuberancia de la base de una nube madre. Las nubes embudo suelen formar parte en de una asociación con una supercelda de tormenta. Si una nube embudo toca tierra pasa a tornado. Muchos tornados comienzan como nubes embudo, pero muchas de estas nubes nunca toman contacto con tierra o agua. Aunque, un tornado no necesariamente necesita tener asociado un embudo de condensación; si hay fuertes vientos ciclónicos en su superficie, luego surge un tornado.

es.wikipedia.org · CC-BY-SA

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. 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. If a funnel cloud touches the ground it becomes a tornado. Most tornadoes begin as funnel clouds, but many funnel clouds do not make ground contact and so do not become tornadoes. Also, a tornado does not necessarily need to have an associated condensation funnel—if strong cyclonic winds are occurring at the surface (and connected to a cloud base, regardless of condensation), then the feature is a tornado. Some tornadoes may appear only as a debris swirl, with no obvious funnel cloud extending below the rotating cloud base. In cloud nomenclature, any funnel- or inverted-funnel-shaped cloud depending from cumulus or cumulonimbus clouds is technically described as an accessory feature called tuba. The terms tuba and funnel cloud are nearly but not exactly synonymous; a wall cloud, for example, is also a form of tuba.

en.wikipedia.org · CC-BY-SA