A wall cloud is a large lowering of a rain free cloud base often associated with the rotating updraft of a thunderstorm known as a mesocyclone.
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Wall cloud.
A wall cloud is a large rotating cloud formation that extends beneath the storm cloud base, often found in severe thunderstorms and tornadoes. It appears as a lowering and rotating cloud base typically at the rear of the storm. Wall clouds are closely associated with supercell storms and can sometimes indicate an increased likelihood of tornado formation.
A wall cloud is a large, lowering cloud formation that extends beneath the base of a thunderstorm. It often has a wall-like appearance and can be rotating. Wall clouds are typically dark and turbulent, and can sometimes be a precursor to tornado formation.
The cloud formation before a tornado funnel forms is typically a rotating wall cloud. This type of cloud is often associated with severe thunderstorms and can indicate that a tornado may develop. It is important to take shelter if you see a rotating wall cloud, as it could produce a tornado.
Tornadoes form in thunderstorms, which are composed of cumulonimbus clouds. Usually a tornado will form from a wall cloud that develops are the based of the cumulonimbus cloud, and will develop from a funnel cloud that comes out of the wall cloud.