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Natural Disasters - PowerPoint PPT Presentation


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Natural Disasters. Hurricanes. Hurricanes. Massive tropical storms Occur over oceans near the equator. Characteristics. Rotational winds Circular motion High-speed winds. Characteristics. Energy 12X that of other storms Eye Area of low pressure Clear skies No rainfall. Causes.

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Presentation Transcript
hurricanes
Hurricanes
  • Massive tropical storms
  • Occur over oceans near the equator
characteristics
Characteristics
  • Rotational winds
  • Circular motion
  • High-speed winds
characteristics1
Characteristics
  • Energy 12X that of other storms
  • Eye
    • Area of low pressure
    • Clear skies
    • No rainfall
causes
Causes
  • Warm air forced upward by cooler air
  • Drop in atmospheric pressure and increased wind speed
prediction
Prediction
  • 1943 US military aircraft
  • mid-1950 coordinated system
  • Currently
    • Radar, recording devices and satellite data
major hurricanes
Major Hurricanes
  • Fran 1996 (Florida)
  • Luis 1995 (East Coast)
  • Andrew 1992 (Gulf of Mexico)
hurricane andrew 1992
Hurricane Andrew (1992)
  • Began as thunderstorms over West Africa
  • Winds 145 mph (gusts 175 mph)
  • 15 people killed
  • Damages - billions of dollars