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Severe Weather

Severe Weather. Chapter 13.2. A. Supercells - the “king of thunderstorms” - strong winds, large hail, dangerous lightning, possible tornadoes. National Weather Service. B. Downbursts

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Severe Weather

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  1. Severe Weather Chapter 13.2

  2. A. Supercells - the “king of thunderstorms” - strong winds, large hail, dangerous lightning, possible tornadoes National Weather Service

  3. B. Downbursts - very dense, rain-cooled air suddenly collapses to the ground and spreads out horizontally at speeds of up to 170mph. National Weather Service

  4. C. Hail - an ice pellet gets caught in up and down drafts causing it to circulate through the thunderstorm until it becomes too heavy to remain suspended. National Weather Service

  5. D. Tornadoes 1. Distribution - About 1,000 tornadoes occur in the US every year - Tornado Alley Texas, Oklahoma, Kansas, Nebraska, Missouri, Iowa, Illinois. 2. Fujita Scale - Use to rate tornadoes based on damage done. - Less that 1% reach the F4 or F5 status. Video - Tornadoes (6:22 min) National Weather Service

  6. 1. In a home or building, move to a basement or a small interior room or hallway on the lowest floor. Put as many walls as possible between you and the outside. Stay away from windows. 2. Get out of automobiles. Do not try to outrun a tornado in your car; instead, leave it immediately for safe shelter. 3. If caught outside or in a vehicle, lie flat in a nearby ditch or depression and cover your head with your hands. 4. Be aware of flying debris. Flying debris from tornadoes causes most fatalities and injuries. 5. You should leave a mobile home and go to the lowest floor of a sturdy nearby building or a storm shelter. E. Tornado Safety National Weather Service

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