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QUICK WRITE… Analyze this phrase:

QUICK WRITE… Analyze this phrase: “You wear your clothes based on the weather. You buy your clothes based on the climate.”. Predict the climate. Predict the climate. SEVERE WEATHER. thunderstorms.

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QUICK WRITE… Analyze this phrase:

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  1. QUICK WRITE… Analyze this phrase: “You wear your clothes based on the weather. You buy your clothes based on the climate.”

  2. Predict the climate

  3. Predict the climate

  4. SEVERE WEATHER

  5. thunderstorms • A thunderstorm is considered severe if it produces hail 1 inch in diameter or wind gusts of 58 mph or more. • Every thunderstorm produces lightning and the amount of rain can cause flash flooding.

  6. What causes lightning? • Clouds at high levels are made of ice crystals. These ice crystals are pulled in the updrafts of fast sinking and rising motions. • The ice crystals collide causing a change in electrical charge.

  7. What causes lightning? • Positive charges rise and negative charges sink. • Positive charges and move up trees and houses and also you! If your hair is standing on end this is a sign lightning could strike you soon!

  8. What causes lightning? • The negatively charged area at the bottom of the cloud sends out a channel towards the ground called a “step leader.” • Invisible to the human eye • This attracts all the positive charge where it strikes, causing the positive to rise up in a stream as a bright pulse. • This is what we see as lightning!

  9. Think, Pair, Share Why is it safe to be in a car when there is a lightning threat?

  10. Parts of a supercell storm cloud • Mesocyclone - Strong, rotating updraft • Caused by veering winds • Forward-Flank Downdraft - Cold, dense air descending through the front of the storm • Rear-Flank Downdraft - Cold, dense air descending through the back of the storm • Flanking Line - A line of towering cumulonimbus connected to and extending outward from the rear of the supercell

  11. Parts of a supercell storm cloud • Rain Shaft - The area in which rain and/or hail falls to the ground • Overshooting Top - The area of clouds that "punch through" the jet stream into the lower stratosphere (occurs when updraft is particularly strong) • Anvil - The flat layer of high cirrus clouds at the top of the storm that is shaped like an anvil, formed as the jet stream shears the updraft clouds away from the core of the storm

  12. Signs of a tornado • Strong, persistent rotation in the cloud base. • Whirling dust or debris on the ground under a cloud base • Hail or heavy rain followed by either dead calm or a fast, intense wind shift. Many tornadoes are wrapped in heavy precipitation and can't be seen. • Day or night - Loud, continuous roar or rumble, which doesn't fade in a few seconds like thunder. • Night - Small, bright, blue-green to white flashes at ground level near a thunderstorm (as opposed to silvery lightning up in the clouds). These mean power lines are being snapped by very strong wind.

  13. Tornado Alley

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