EARTHSC 2GG3 Lecture Notes - Lecture 22: Tornado Outbreak, Regina Cyclone, Wall Cloud
6 May 2016
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Document Summary
Canada is second with about 100 per year: storms that lead to tornadoes form from collision of warm, humid air from gulf of. Mexico and cold air from canada no barrier in central u. s. to keep air masses apart: number of tornadoes is greatest in tornado alley: parts of texas, oklahoma, Outbreaks have killed as many as several hundred people in as many as. Superoutbreak of 1974 produced 148 tornadoes over 17 hours along. During a supercell storm over utah, a wall cloud descends from the main anvil cloud. Internal winds can be as high as 515 km/hr: vortex2 project allowed view into open core of tornado (reminiscent of hurricane eye, as tornado matures, it becomes wider and more intense. In waning stages, it becomes narrow, sometimes ropelike before breaking up. Image: mesocyclone tornado, courtesy of nocaa: classification of tornadoes, fujita scale devised to classify severity of tornadoes based on internal wind speeds and damage produced.
