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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 Late Summer and Fall

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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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