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This case is a good example of wall cloud and mesocyclone formation from an average looking thunderstorm. Early observations were not encouraging that a tornado would occur on this day.
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www.chaseday.com/mesoformation.htm
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Wall Cloud in No Man's Land ... Wolfe City Wall Cloud ... Shallowater Wall Cloud...
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www.stormeyes.org/tornado/SkyPix/skypixwc.htm
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The wall cloud is defined as an isolated cloud lowering attached to the rain free base. The wall cloud is usually to the rear (generally south or southwest) of the visible precipitation area. Sometimes, though, the wall cloud may be to the east or southeast of the precipitation area.
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www.tsgc.utexas.edu/stars/tscloud.html
www.tsgc.utexas.edu/stars/tscloud.html
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Wall Cloud Climate glossary Geography for Children - Interactive World Fact Book - Flags, Maps, Economy, Geography, Climate, Natural Resources, Current Issues, International Agreements, Population, Social Statistics, Political System ... *Wall Cloud - A localized, persistent, often abrupt lowering from a rain-free base.
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www.geographic.org/climate/w.html
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It was beneath the tail cloud and not the wall cloud! Events such as this have been observed more than once. ... About 5 minutes later, the scud cloud entered the updraft area and was lifted into the cloud base. This was the beginning of a wall and tail cloud that persisted for over 30 minutes.
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ww2010.atmos.uiuc.edu/(GH)/guides/mtr/svr/comp/wall/dvl...
ww2010.atmos.uiuc.edu/(GH)/guides/mtr/svr/comp/wall/dvlp.rxml
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The rain-cooled air is very humid, and upon being lifted it quickly saturates to form the lowered cloud base. Thus, the wall and tail cloud probably develop sometime after an intense supercell or multicell storm begins to precipitate.
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ww2010.atmos.uiuc.edu/(Gh)/wwhlpr/wall_cloud.rxml
ww2010.atmos.uiuc.edu/(Gh)/wwhlpr/wall_cloud.rxml
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A wall cloud with tail cloud ... Rotating wall cloud with RFD clear slot. ... Wall cloud with lightning.
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commons.wikimedia.org/wiki/Special:Search/Wall_cloud
commons.wikimedia.org/wiki/Special:Search/Wall_cloud
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"Wall cloud" also is used occasionally in tropical meteorology to describe the inner cloud wall surrounding the eye of a tropical cyclone, but the proper term for this feature is eyewall.
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www.weather.gov/glossary/index.php?word=wall+cloud
www.weather.gov/glossary/index.php?word=wall+cloud
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