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Tornadoes
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Tornadoes

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Transcript

  • 1. An Introduction to Hurricanes
  • 2. Objectives for today
    • Understand the various factors that help to create a hurricane.
    • Learn the various stages in the life cycle of a hurricane
    • Learn how weather forecasters track hurricanes to warn people
    • Apply some of our knowledge to the current weather events involving Hurricane Ike
  • 3. Hurricanes – the whole
    • A hurricane is a tropical cyclone, a large, swirling storm that produces lots of wind and rain
      • How do they move?
      • What’s the eye?
      • Why don’t they hit Kansas?
  • 4. What creates a hurricane?
    • Origin of most hurricanes
    • Start to become hurricanes because of two main factors
      • Little or no wind shear allows a storm to gather its strength
      • The ocean gives the storm plenty of water to feed itself with
    • Where do they form?
    • What’s the “life cycle” of a hurricane?
  • 5. How do we characterize hurricanes?
    • Strength
      • Saffir-Simpson Scale
    • Names
      • Given by the World Meteorological Organization every year
      • Destructive storms have their names “retired”
  • 6.
    • Objectives for today: Answer the following questions …
    • What are tornadoes, and why do they hate Kansas?
    • Where do tornadoes get their energy?
    • What’s the latest word on tornado forecasting?
    • What should we do when the sirens go off?
  • 7. A killer sandwich?
    • Thunderstorms help produce tornadoes
    • Thunderstorms form where cool, dry air meets warm, moist air
    • Area of the country where there are many thunderstorms and tornadoes: “Tornado Alley”
  • 8. How tornadoes are born
    • Involves pockets of air – diagram time
    • Happens most around us because of our environment
      • Rocky Mountains to northwest
      • Gulf of Mexico to southeast
    • Thunderstorms and tornadoes
      • 100,000 thunderstorms in the U.S.
      • 1,000 tornadoes formed
  • 9. Winds too quick to measure
    • Too dangerous to measure
      • “ Twister” and real science
      • Measured by Doppler radar and assessed from damage
    • Some things about tornadoes
      • Range from 150 ft to a mile across
      • Can last from a few minutes to an hour
      • Can move from a few hundred feet to 100 miles
      • Travel along the ground up to 60 mph
  • 10. Steps to making a tornado
    • Inversion cap forms
    • Warm, high pressure air breaks through the cap
    • Air shoots through the break
    • Rain and hail form
    • Condensation keeps the storm growing
    • Anvil top
    • Live or die
    • Mesocyclone
    • Tornado
  • 11. Tornado forecasting
    • Tornadoes tough to predict and forecast
      • Size of storms
      • Directions
    • Tracking and forecasting
    • The bad news
      • Tornadoes develop faster than we thought
      • Problems with warnings
  • 12. Protecting ourselves
    • Early warnings
      • Tornado watch
      • Tornado warning
    • Taking shelter – down
      • Basement
      • In interior room
      • Under furniture
      • At a shelter or in a ditch
    • Tornado survival kit

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