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Do Now

Do Now . What can you remember about the weather? What happens during a cold front? What do you remember about the weather map shown below?. Announcements. You will not have my class again until Friday. Good luck with EOGs!. Going back in time…. To weather! . Changes in Weather.

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Do Now

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  1. Do Now What can you remember about the weather? What happens during a cold front? What do you remember about the weather map shown below?

  2. Announcements • You will not have my class again until Friday. • Good luck with EOGs!

  3. Going back in time… • To weather!

  4. Changes in Weather

  5. Air Mass __________: a large body of air that has the same properties as the surface over which it develops. 6 air masses effect U.S.

  6. Pressure SystemsAtmospheric Pressure:- caused by air molecules pushing on the Earth’s surface- determined by temperature, density, and water vapor in the air

  7. High Pressure ________________: air flows downward and outward in a clockwise spiral. Brings fair weather – hard for air to rise and form clouds

  8. Low Pressure ______________: air flows upward and inward in a counterclockwise spiral. Brings cloudy weather

  9. Front _______: boundary between two different pressure system.

  10. Warm Front _____________: develops when a less dense warm air mass slides over a descending cold air mass.

  11. Cold Front ____________: cold air mass pushes under a warm air mass and forces the warm air steeply up. Cumulous/cumulonimbus clouds – move slower than warm front

  12. Occluded Front _________________: two cool air masses merge and force warm air upward. Strong winds and heavy precipitation

  13. Stationary Front __________________: pressure differences cause a warm from or a cold front to stop moving. Same place for days – light wind and precipitation across entire front

  14. 2. Severe Weather

  15. Thunderstorm _______________: heavy rainfall, lightning flashes, thunder, and maybe hail. Warm moist air forced upward rapidly, cools, condenses – cumulonimbus cloud

  16. Air builds up + and – electrical charges; current flows between opposite charges and __________ is produced. lightning

  17. Rapid heating of air around a lightning bolt creates _________. thunder

  18. Tornado __________: violent whirling wind that moves in a narrow path over land usually SW to NE.

  19. Wind Shear _____________: wind moving in different directions, at different speeds, and at different elevations.

  20. Hurricane ___________: large, swirling, low pressure system that forms over tropical oceans. Most powerful storm

  21. Project • In partners, you will be writing a weather report for Charlotte for the weekend.

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