An Introduction to Hurricanes
Objectives for today <ul><li>Understand the various factors that help to create a hurricane. </li></ul><ul><li>Learn the v...
Hurricanes – the whole <ul><li>A hurricane is a tropical cyclone, a large, swirling storm that produces lots of wind and r...
What creates a hurricane? <ul><li>Origin of most hurricanes </li></ul><ul><li>Start to become hurricanes because of two ma...
How do we characterize hurricanes? <ul><li>Strength </li></ul><ul><ul><li>Saffir-Simpson Scale </li></ul></ul><ul><li>Name...
<ul><li>Objectives for today: Answer the following questions … </li></ul><ul><li>What are tornadoes, and why do they hate ...
A killer sandwich? <ul><li>Thunderstorms help produce tornadoes </li></ul><ul><li>Thunderstorms form where cool, dry air m...
How tornadoes are born <ul><li>Involves pockets of air – diagram time </li></ul><ul><li>Happens most around us because of ...
Winds too quick to measure <ul><li>Too dangerous to measure </li></ul><ul><ul><li>“ Twister” and real science </li></ul></...
Steps to making a tornado <ul><li>Inversion cap forms </li></ul><ul><li>Warm, high pressure air breaks through the cap </l...
Tornado forecasting <ul><li>Tornadoes tough to predict and forecast </li></ul><ul><ul><li>Size of storms </li></ul></ul><u...
Protecting ourselves <ul><li>Early warnings </li></ul><ul><ul><li>Tornado watch </li></ul></ul><ul><ul><li>Tornado warning...
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Tornadoes

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Tornadoes

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

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