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Severe Weather

Severe Weather. Hurricanes and Tornadoes. Tornadoes. Tornadoes are a violently whirling column of air, usually seen as a funnel-shaped cloud extending from the base if a thunderhead. Tornadoes. Tornadoes May be 3m to 3km across Tornado Alley runs from Texas to Michigan

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Severe Weather

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  1. Severe Weather Hurricanes and Tornadoes

  2. Tornadoes • Tornadoes are a violently whirling column of air, usually seen as a funnel-shaped cloud extending from the base if a thunderhead

  3. Tornadoes • Tornadoes • May be 3m to 3km across • Tornado Alley runs from Texas to Michigan • US averages more than 800 a year • Usually last a few minutes • Very destructive • Winds can be more than 400 km/h

  4. Average tornado frequency by month of year 2003-2005

  5. Fujita Scale

  6. Hurricanes • Hurricanes need warm tropical oceans, moisture and light winds above them. • If the right conditions last long enough, a hurricane can produce violent winds, incredible waves, torrential rains and floods. • Also called Typhoons or Cyclones

  7. Stages of Development • Strong Storm • Depression • Tropical Storm • Hurricane

  8. Saffir-Simpson Hurricane Damage-Potential Scale

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