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TORNADOES. U.S averages 1000 tornadoes/year; more than any country U.S averages 1000 tornadoes/year; more than any country.

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Presentation on theme: "TORNADOES. U.S averages 1000 tornadoes/year; more than any country U.S averages 1000 tornadoes/year; more than any country."— Presentation transcript:

1 TORNADOES

2 U.S averages 1000 tornadoes/year; more than any country U.S averages 1000 tornadoes/year; more than any country

3 Tornadoes of 2012 868 tornadoes in 2012 in U.S.

4 definition A vertically rotating column of air A vertically rotating column of air Low pressure Low pressure

5 Tornado without funnel

6 Conditions that favor tornado formation

7 FORMATION OF mT collides with cP (T-storm) Strong winds aloft create horizontal spinning Updrafts lift rotating air

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9 http://www.youtube.com/watch?fea ture=player_embedded&v=GM- abtIT6Is Tornado formation TWC

10 TORNADO ALLEY

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17 Supercell- long lived t-storm with updrafts

18 Multiple vortexes

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24 In Low pressure air is ________

25 Why do tornadoes pick up things?

26 WATCHES AND WARNINGS TORNADO WATCH TORNADO WATCH Conditions are favorable Conditions are favorable mT/cP colliding mT/cP colliding Strong updrafts Strong updrafts TORNADO WARNING TORNADO WARNING A tornado has formed (sited or by radar) A tornado has formed (sited or by radar) Take cover! Take cover!

27 DOPPLER RADAR Shows wind movement; Shows wind movement; Redshift/blueshift = horizontal rotation Redshift/blueshift = horizontal rotation

28 Doppler Radar Look for radar “hook” = TORNADO! Look for radar “hook” = TORNADO!

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30 Enhanced Fujita Scale Confi rmed Total Confi rmed EF0 Confi rmed EF1 Confi rmed EF2 Confi rmed EF3 Confi rmed EF4 Confi rmed EF5 868*53621985234 2012

31 Tornado season- spring

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33 Feb. 5, 2008 (Super Tues.) 57 deaths 57 deaths 87 tornadoes 87 tornadoes

34 Joplin, MO May 22, 2011 EF5 EF5 160 deaths 160 deaths 7 th worst in US history 7 th worst in US history 75% of town damaged 75% of town damaged

35 DAMAGE Most from flying debris Most from flying debris

36 What to do? Don’t try to outrun- get to a low place Don’t try to outrun- get to a low place Go to the basement or center of house Go to the basement or center of house Seek shelter under a mattress or sturdy piece of furniture Seek shelter under a mattress or sturdy piece of furniture Don’t waste time opening windows! Don’t waste time opening windows!

37 July 2, 1997 Grosse Pointe Farms (F-4)

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39 GP memories of 1997 tornado http://atdetroit.net/forum/messages/67 90/106342.html?1183610667 http://atdetroit.net/forum/messages/67 90/106342.html?1183610667 http://atdetroit.net/forum/messages/67 90/106342.html?1183610667 http://atdetroit.net/forum/messages/67 90/106342.html?1183610667

40 Flint-Beecher Tornado Deadliest in Michigan Deadliest in Michigan June 3, 1953 June 3, 1953 116 dead 116 dead F-5 F-5

41 11-11-11 11:11 Owosso, MI

42 Waterspouts Smaller Smaller Less damaging Less damaging

43 Dust devils Form in fair weather Form in fair weather Hot air rises into cooler air Hot air rises into cooler air Not dangerous Not dangerous

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