This rare picture was taken on July 2008 in Halliday, North Dakota when about 4 funnel clouds almost touched down.
You're probably wondering what's a funnel cloud.
Funnel cloud is a cloud of condensed water droplets, associated with a rotating column of air 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 frequently form 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, 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.
A funnel cloud that touches down on, or moves over water is a waterspout. can be considered weak tornadoes that do not have a visible portion reaching the ground.
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, 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.
A funnel cloud that touches down on, or moves over water is a waterspout. can be considered weak tornadoes that do not have a visible portion reaching the ground.
But more commonly, the tornadic circulation is too weak to support a well developed condensation funnel. Nevertheless, in virtually all true funnel cloud situations, there will be a circulation of air reaching from the visible funnel all the way to the ground. Low clouds associated with thunderstorms are often mistaken for funnel clouds
Source: Wikipedia.org

1 comments:
Well that's a first!! I've never seen something like that before!
Post a Comment