StormsDay3s - Chasing Tornadoes Search on “storm chase”...

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Unformatted text preview: Chasing Tornadoes Search on “storm chase”. • Discovery Channel - StormChase 1 The Science of Storm Chasing 1 (6:48) 1 Storm Hazards Thunderstorm Hazards • lightning • tornado • hail • downpours (of rain) / local Fooding • downbursts (of air) / gustfronts Hurricane Hazards • contain thunderstorms • storm surge / coastal Fooding • high waves • coastal erosion today 2 Tornadoes 1. Recognizing tornadoes 2. Recognizing supercell rotation 3. Speeds and disaster scales 4. Tornado safety 5. Tornado risk 6. Tornado Outbreaks 7. Tornado types and evolution 8. Forecasting tornadoes and public warnings Prof. Roland Stull Today we will cover: The Turbulent Atmosphere (Storms) Manitoba tornado, July 2007 3 Today’s Learning Goals Be able to recognize tornadoes and wall clouds. Explain why supercell thunderstorms spawn the most dangerous tornadoes. Relate the Enhanced Fujita scale to different amounts of damage. Describe safety procedures near tornadoes. Identify the times and places for high tornado risk. By the end of this period, you should be able to: 4 • Tornadoes are violently- rotating columns of air , in contact with the ground. • All violent tornadoes come from supercell thunderstorms 1. Recognizing Tornadoes Most tornadoes are made visible by cloud- water droplets (the funnel cloud ) and/or dust and debris from the ground (the debris cloud ). Some tornadoes are invisible. Gene Moore, ChaseDay 5 Only a small percentage of thunderstorms have tornadoes . In N. America, most Thunderstorms move from southwest (SW) toward northeast (NE). Supercell storms : • strongest • most likely to have tornadoes • but not all supercells spawn tornadoes Best thunderstorms viewing is : • off to the side of the storm path • preferred side is to the southeast of the storm (at X ) • look at the storm toward northwest • resulting supercell storm looks like sketch at upper left by David Hoadley (from T. Marshall, 1995, Storm Talk) . Tornadoes are Attached to Thunderstorms a) View Looking toward NW b) View Looking Down from Above Tornado 6 Tornadoes are Attached to Thunderstorms From: Gene Moore, chaseday.com From: Gene Moore, chaseday.com 7 Rod Loraas, Alberta debris Examples of Strong Tornadoes (from Supercell Thunderstorms) 8 Tornado...
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StormsDay3s - Chasing Tornadoes Search on “storm chase”...

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