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Tropical Cyclones Hurricanes Typhoons

Tropical Cyclones Hurricanes Typhoons. Hurricane Ike 2008. Tropical Cyclone. Large, rotating, low-pressure storm Forms over water during summer and fall in the tropics . Tropical Cyclones. Tropical cyclones require two basic conditions: An abundant supply of very warm ocean water

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Tropical Cyclones Hurricanes Typhoons

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  1. Tropical CyclonesHurricanesTyphoons

  2. Hurricane Ike 2008

  3. Tropical Cyclone • Large, rotating, low-pressure storm • Forms over water during summer and fall in the tropics

  4. Tropical Cyclones • Tropical cyclones require two basic conditions: • An abundant supply of very warm ocean water • 29oC (84oF) • Mechanism to lift warm air and keep it rising

  5. Tropical Cyclones • Occur most frequently in the late summer and early fall • These conditions exist in all tropical oceans except the South Atlantic Ocean** and the Pacific Ocean west of the South American Coast. • ** first and only recorded hurricane in 2004

  6. Tropical Cyclones

  7. Tropical Cyclones • Tropical cyclones move according to the wind currents that steer them. • Tradewinds • Prevailing Westerlies • Local winds

  8. Stages of Tropical Cyclones • Tropical Waves • Begin as weak, low-pressure systems called tropical waves

  9. Stages of Tropical Cyclones • Tropical Depression • Begins to rotate • Storm is issued a number • Tropical Storm • Winds speeds exceed 65 km/h • Storm is given a name

  10. Stages of Tropical Cyclones • Hurricane (typhoon, cyclone) • Air pressure continues to fall • Wind speed reaches at least 120 km/h

  11. Stages of Tropical Cyclones • A hurricane will last until it can no longer produce enough energy to sustain itself. • moves over land. • moves over colder water.

  12. Classifying HurricanesThe Saffir-Simpson Scale • Classified based on: • wind speed • air pressure in the center • potential for property damage

  13. Hurricane Hazards • Storm surge • The mound of water pushed in front of a hurricane • Flooding • Violent winds • Tornadoes

  14. Storm Surge Hurricane Katrina 2005 Hurricane Camille 1969

  15. Galveston 1900

  16. Hurricane Andrew 1992 Hurricane Hugo 1989

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