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Tornados vs. Hurricanes. WHAT DO HURRICANES AND TORNADOES HAVE IN COMMON? Low Pressure Low Pressure Strong Winds Strong Winds Hazardous to Life and Property.

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Presentation on theme: "Tornados vs. Hurricanes. WHAT DO HURRICANES AND TORNADOES HAVE IN COMMON? Low Pressure Low Pressure Strong Winds Strong Winds Hazardous to Life and Property."— Presentation transcript:

1 Tornados vs. Hurricanes

2 WHAT DO HURRICANES AND TORNADOES HAVE IN COMMON? Low Pressure Low Pressure Strong Winds Strong Winds Hazardous to Life and Property Hazardous to Life and Property

3 HOW DO THEY DIFFER? Location Location Size Size Duration Duration Season of Occurrence Season of Occurrence Distinctive Hazards Distinctive Hazards

4 WHEN DO THEY OCCUR? Hurricane season Hurricane season Late Summer and Fall Tornado season Tornado season Spring and Early Summer

5 Hurricanes form over warm (80 °F) tropical seas Hurricanes form over warm (80 °F) tropical seas Latitude 7-15 degrees North and South of the equator Tornadoes form over land in the mid-latitudes Tornadoes form over land in the mid-latitudes

6 SIZE AND DURATION OF HURRICANES

7 HURRICANE DAMAGE High winds High winds mph Torrential rains Torrential rains Flash floods Storm surges as sea level rises Storm surges as sea level rises

8 HURRICANE CLASSIFICATIONS Category One -- Winds mph Category Two -- Winds mph Category Three -- Winds mph Category Four -- Winds mph Category Five -- Winds greater than 155 mph

9 LOCATION OF TORNADOES Most common in the United States Most common in the United States Plains States, Midwest, and Florida Plains States, Midwest, and Florida In advance of a cold front In advance of a cold front Embedded in hurricanes Embedded in hurricanes

10 SIZE AND DURATION OF TORNADOES Narrow intense storm Narrow intense storm 1/4 mile wide 1/4 mile wide Path of 6 miles SW to NW Path of 6 miles SW to NW

11 Tornado Hazards Wind Speed 40 – 300 mph Strong updraft in the funnel Explosions due to pressure contrast

12 F ujita Pearson Tornado Scale F-0: mph, chimney damage, tree branches broken F-1: mph, mobile homes pushed off foundation or overturned F-2: mph, considerable damage, mobile homes demolished, trees uprooted F-3: mph, roofs and walls torn down, trains overturned, cars thrown F-4: mph, well-constructed walls leveled F-5: mph, homes lifted off foundation and carried considerable distances, autos thrown as far as 100 meters


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