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Quiz/Review

Quiz/Review. Get out a small piece of paper and put your name on it. When the bell rings, the quiz will begin. Question 1. Where is the tornado valley?. Question 2. What time a year do tornadoes strike?. Question 3. What is the scale used to measure tornadoes?. Answers.

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Quiz/Review

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Presentation Transcript

  1. Quiz/Review • Get out a small piece of paper and put your name on it. • When the bell rings, the quiz will begin.

  2. Question 1 • Where is the tornado valley?

  3. Question 2 • What time a year do tornadoes strike?

  4. Question 3 • What is the scale used to measure tornadoes?

  5. Answers • Mid west United States. • Spring • Fujita scale or Enhanced Fujita scale

  6. Winter weather Blizzards and lake effect snow

  7. What is a blizzard • A storm that has strong wind and low temperatures. • Winds of 35 mph or more (sustained) • Visibility of less than ¼ mile for at least three hours.

  8. Where do Blizzards strike? • Strike anywhere that is subject to snow. • Northern US, Russia, Mountain areas (usually high latitudes)

  9. When to blizzards hit? • During cold winter months but usually occur during coldest months like January and February.

  10. What is Lake Effect Snow? • When winds cross warmer waters and “pick-up” water vapor. • Wind blows storm clouds over land were it falls as snow. In February, 2007, a prolonged lake-effect snow event left 141 inches of snow on the Tug Hill Plateau. Fulton, New York after a snowburst dropped 5–6 feet of snow over most of Oswego County between January 28–31, 2004.

  11. How do lake effect storms occur? • Fetch (long) • Length of the water the wind flows over. • At least 62 miles • Warm water (warmer than air) • Difference of 23 degrees F • Steady wind direction and speed (20mph) • Orographic lifting • Air cools as it rises, cold air cant hold moisture.

  12. Where do lake effect storms hit? • Near the great lakes is most common in the US. • Tug Hill gets the most snow in the US (not in the mountains)

  13. Wind Chill • Both Lake Effect and Blizzards have a number of hazards to be concerned with but the most important is wind chill.

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