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Tornadoes

Tornadoes. Tornadoes 101. Tornado Alley. Average number of tornadoes per 10,000 square miles by state, 1999-2008. Multivortex Tornadoes. Enhanced Fujita Scale. EF Rating Can Change. McConnell AFB Footage. Tornadoes and Thunderstorms. Most violent tornadoes come from supercells

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Tornadoes

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  1. Tornadoes Tornadoes 101

  2. Tornado Alley Average number of tornadoes per 10,000 square miles by state, 1999-2008

  3. Multivortex Tornadoes

  4. Enhanced Fujita Scale

  5. EF Rating Can Change McConnell AFB Footage

  6. Tornadoes and Thunderstorms • Most violent tornadoes come from supercells • Updrafts can be 150 mph • Horizontal wind with strong velocity sheer causes rotation about horizontal axis • Caught by updraft it turns vertical • Spinning column of air narrows and picks up speed • Initial tornado formation (only 1st minute) • Cool downdraft air eventually dissipates tornado • Inside a forming tornado

  7. Tornado-Thunderstorm Connection Schematic (side) view of a tornadicsupercell thunderstorm Plan (top) view of a tornadicsupercell thunderstorm Most mesoclyclonic wall clouds do not produce tornadoes

  8. Monitoring Tornadic Thunderstorms A B Hook echo. Tornado vortex signature (TVS). On 3 May 1999, an F-5 tornado devastated Moore, OK.

  9. North Carolina Tornado Outbreak4/16/2011

  10. Monitoring Tornadic Thunderstorms April 16, 2011, North Carolina tornado outbreak 4:40 pm DST Smithfield Hook echo on base reflectivity image. Four Oaks Tornado vortex signature (TVS) on storm relative image.

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