TORNADOES. April, 20, 2014 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 transcript:

TORNADOES

April, 20, 2014

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

Tornadoes of tornadoes in below average year

definition A vertically rotating column of air (funnel) A vertically rotating column of air (funnel) Low pressure Low pressure

Conditions that favor tornado formation

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

Tornado formation – instant egghead =7bHSS1ImFQI

TORNADO ALLEY

Why do tornadoes pick up things? “We’ve got cows” “We’ve got cows” QgjrrEeHA QgjrrEeHA QgjrrEeHA QgjrrEeHA

In Low pressure air is ________

Supercell- long lived t-storm with updrafts

supercell

Multiple vortexes

Which way is this storm moving?

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!

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

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

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*

Tornado season?

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

DAMAGE Most from flying debris Most from flying debris

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!

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

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

:11 Owosso, MI

Waterspouts Smaller Smaller Less damaging Less damaging

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