StormsDay2s - Storm Chasing 20 - YouTube clips (search on...

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Storm Chasing 20 - YouTube clips (search on “storm chase”): • Storm Chase ‘09 Time Lapse Montage (1:40) 1 More Thunderstorm Fundamentals - Supercell thunderstorms & mesocyclones Thunderstorm Hazards: downbursts of air B. Moist air – the fuel for storms Outline for Today The Turbulent Atmosphere (Storms) Prof. Roland Stull Gene Rhoden, weatherpix.com 2
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Today’s Learning Goals Explain the main characteristics that make a supercell so much nastier than a normal Tstorm. Be able to recognize thunderstorms in radar and satellite images. Explain the behavior of downbursts and gust fronts, and identify their associated cloud & dust features. Describe why the fact that “cold air holds less water vapour than warm air” is critical in explaining how Tstorms can extract energy from humid air. By the end of this period, you should be able to: 3 cumulonimbus (thunderstorms) are made of large cells that evolve during 15-30 min. most thunderstorms contain 2 or more cells, and are called multicell thunderstorms sometimes a very large, rotating single-cell thunderstorm forms, called a supercell Tstorm. They can cause the most violent tornadoes, large hail, frequent lightning, heavy rain, strong winds. Supercell types: low precipitation , classical , high precip. Thunderstorm Cells - supercells 4
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Supercell Thunderstorm: Rod Loraas. Alberta 5 Video Clip From “StormWatcher” Video, CTL: 28:30 - 34:15 Supercell Thunderstorms - low precipitation (LP) - classic - high precipitation (HP) 6
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Rod Loraas. Alberta Often the whole Supercell Thunderstorm rotates as a Mesocyclone , and can spawn tornadoes. The rotation is too slow to see by eye, but often you can see a barrel shaped updraft tower with helical cloud striations like threads of a screw. 7 Storm Chasing YouTube clips (search on “mesocyclone”): • Fort Cobb, OK, Supercell Time-Lapse (1:50) 8
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Observing and Monitoring using Remote Sensors Satellite Radar 9 Recall this photo from last time. Note the oval shape of the anvil cloud.
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StormsDay2s - Storm Chasing 20 - YouTube clips (search on...

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