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Understanding Tropical Cyclonic Storms and Hurricane Preparation

Learn about tropical storms, hurricanes, and the Saffir-Simpson scale for classification. Discover how to prepare for hurricanes, hazards like storm surge, and historical events like the Great Galveston Hurricane of 1900.

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Understanding Tropical Cyclonic Storms and Hurricane Preparation

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  1. Cyclonic Storms

  2. Tropical Storms • Tropical storms are large, rotating, low pressure storms • The strongest of these storms are known as hurricanes

  3. Tropical Storms • Tropical storms form in a low pressure system when water evaporates off of warm, tropical waters • This creates a region of low pressure which attracts surrounding air • The rotation of the Earth (Coriolis Effect) causes the storm to begin spinning

  4. Eye • The eye of a hurricane is the center that is relatively calm • The eyewall is the band surrounding the eye that has the strongest winds

  5. Classifying Hurricanes • The Saffir-Simpson hurricane scale classifies hurricanes based on: • Wind speed • Air pressure • Potential for property damage

  6. Hurricanes • Hurricanes will last until it can no longer produce enough energy to sustain itself • Usually happens when a hurricane moves over land

  7. Hazards • Storm Surge-Occurs when hurricane force winds drive a mound of ocean water toward coastal areas • Can reach 6 meters above normal sea level

  8. Hurricane Preparation • Hurricanes can be observed from weather satellites orbiting the Earth • Can improve hurricane warnings which can give people time to leave • During hurricanes you should: • Board up the house • Stay indoors • Have plenty of food and water • Stay away from windows

  9. Galveston Hurricane • September 8, 1900-Galveston, Texas • Category 4 • Greatest loss of life-6,000-12,000 Deaths • 3rd highest number of casualties out of any Atlantic Hurricane • Great Hurricane of 1780 • Hurricane Mitch 1998

  10. Hurricane Katrina • New Orleans, Louisiana. Category 3 Hurricane • 1,836 Deaths, mostly resulted from the levee breaking • Deadliest US Hurricane since 1928

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