Wall cloud: Difference between revisions
From Glossary of Meteorology
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<div class="definition"><div class="short_definition">(Sometimes referred to as [[pedestal cloud]].) A local, often abrupt lowering from a [[cumulonimbus]] cloud base into a low-hanging [[accessory cloud]], normally a kilometer or more in diameter.</div><br/> <div class="paragraph">A wall cloud marks the lower portion of a very strong [[updraft]], usually associated with a [[supercell]] or severe [[multicell storm]]. It typically develops near the [[precipitation]] region of the cumulonimbus. Wall clouds that exhibit significant rotation and vertical motions often precede [[tornado]] formation by a few minutes to an hour.</div><br/> </div><div class="reference">Fujita, T. 1959. A detailed analysis of the Fargo tornadoes of June 20, 1957. U.S. Wea. Bur. Res. Paper 42. p.15. </div><br/> | <div class="definition"><div class="short_definition">(Sometimes referred to as [[pedestal cloud]].) A local, often abrupt lowering from a [[cumulonimbus]] cloud base into a low-hanging [[accessory cloud]], normally a kilometer or more in diameter.</div><br/> <div class="paragraph">A wall cloud marks the lower portion of a very strong [[updraft]], usually associated with a [[supercell]] or severe [[multicell convective storm|multicell storm]]. It typically develops near the [[precipitation]] region of the cumulonimbus. Wall clouds that exhibit significant rotation and vertical motions often precede [[tornado]] formation by a few minutes to an hour.</div><br/> </div><div class="reference">Fujita, T. 1959. A detailed analysis of the Fargo tornadoes of June 20, 1957. U.S. Wea. Bur. Res. Paper 42. p.15. </div><br/> | ||
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Latest revision as of 18:13, 25 April 2012
wall cloud
(Sometimes referred to as pedestal cloud.) A local, often abrupt lowering from a cumulonimbus cloud base into a low-hanging accessory cloud, normally a kilometer or more in diameter.
A wall cloud marks the lower portion of a very strong updraft, usually associated with a supercell or severe multicell storm. It typically develops near the precipitation region of the cumulonimbus. Wall clouds that exhibit significant rotation and vertical motions often precede tornado formation by a few minutes to an hour.
Fujita, T. 1959. A detailed analysis of the Fargo tornadoes of June 20, 1957. U.S. Wea. Bur. Res. Paper 42. p.15.
