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Tornados vs. Hurricanes

Tornados vs. Hurricanes. WHAT DO HURRICANES AND TORNADOES HAVE IN COMMON?. Low Pressure Strong Winds Hazardous to Life and Property . HOW DO THEY DIFFER?. Location Size Duration Season of Occurrence Distinctive Hazards. WHEN DO THEY OCCUR?. Hurricane season

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Tornados vs. Hurricanes

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  1. Tornados vs. Hurricanes

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

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

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

  5. 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

  6. SIZE AND DURATION OF HURRICANES

  7. HURRICANE DAMAGE • High winds • 75-125 mph • Torrential rains • Flash floods • Storm surges as sea level rises

  8. HURRICANE CLASSIFICATIONS • Category One -- Winds 74-95 mph • Category Two -- Winds 96-110 mph • Category Three -- Winds 111-130 mph • Category Four -- Winds 131-155 mph • Category Five -- Winds greater than 155 mph

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

  10. SIZE AND DURATION OF TORNADOES • Narrow intense storm • 1/4 mile wide • 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. Fujita Pearson Tornado Scale • F-0: 40-72 mph, chimney damage, tree branches broken • F-1: 73-112 mph, mobile homes pushed off foundation or overturned • F-2: 113-157 mph, considerable damage, mobile homes demolished, trees uprooted • F-3: 158-205 mph, roofs and walls torn down, trains overturned, cars thrown • F-4: 207-260 mph, well-constructed walls leveled • F-5: 261-318 mph, homes lifted off foundation and carried considerable distances, autos thrown as far as 100 meters

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