http://ww2010.atmos.uiuc.edu/(Gh)/guides/mtr/svr/torn/home.rxml A tornado is defined as a violently rotating column of air in contact with the ground and pendent from a cumulonimbus cloud.
Cumulonimbus clouds (Cb) are much larger and more vertically developed than fair weather cumulus. They can exist as individual towers or form a line of towers called a squall line. Fueled by vigorous convective updrafts (sometimes in excess 50 knots), the tops of cumulonimbus clouds can easily reach 39,000 feet (12,000 meters) or higher.
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The tornado season for Champaign-Urban is generally March through October.
Diff. btw tornado watch and tornado warning:
Tornado watch: be alert--weather conditions in the county are such that tornado could develop.
Tornado Warning: take cover--a tornado has been sighted in the immediate area, danger is imminent, and protective action is called for immediately.
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The tornado season for Champaign-Urban is generally March through October.
Diff. btw tornado watch and tornado warning:
Tornado watch: be alert--weather conditions in the county are such that tornado could develop.
Tornado Warning: take cover--a tornado has been sighted in the immediate area, danger is imminent, and protective action is called for immediately.
