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13.1 notes Thunderstorms

13.1 notes Thunderstorms. Main idea. Extreme weather is controlled by the same processes as good weather. Thunderstorms. Atmospheric conditions required. Moisture in low-mid levels of atmosphere A lifting force to cause air to begin rising; such as heated air near the ground!

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13.1 notes Thunderstorms

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  1. 13.1 notes Thunderstorms

  2. Main idea • Extreme weather is controlled by the same processes as good weather.

  3. Thunderstorms Atmospheric conditions required • Moisture in low-mid levels of atmosphere • A lifting force to cause air to begin rising; such as heated air near the ground! • Unstable air (air that will continue rising & rising!!)

  4. Components of thunderstorm • Lighting • Development: a buildup of charges forms as tops of clouds become +++ charged & bottoms of clouds become ---- charged.

  5. Thunder • Development: Lighting quickly heats the air around it, causes • rapid expansion & a “boom” sound.

  6. Extreme weather produced by thunderstorms Tornadoes • Describe: • A violently rotating column of air • rising up into a cloud & also touching • the ground below.

  7. Tornadoes • Conditions required: • Wind Shear: a change in speed & direction at differ altitudes: causes clouds to spin. • Sinking air pushes one end of column towards land. Other end rises: spins faster!! • Spinning cloud joins & creates a funnel cloud. • When funnel cloud touches ground, it creates a tornado!!!!!!!!!!!!

  8. Tropical Cyclones • Describe: low-pressure weather systems w/circular wind motion; rotates counter-clockwise in N. Hemisphere. “Eye am watching you!”

  9. Explain names: TYPHOON: when thunderstorms converge in the W. Pacific or Coast off of China. Philippines

  10. HURRICANE: when storms are born off of the coast of Africa &travel across the Atlantic Ocean.

  11. Conditions Required: • Growth is over warm ocean waters ! • Air spins & rises, then it cools & causes it to release heat • When wind reaches 74+mph: called a hurricane!!

  12. Other extreme weather: blizzards • Describe: • Winter storms that bring lower temps, high winds, heavy snow, & poor visibility. • (Alaska! Need I say more!) “You are a crazy old man”

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