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Fronts. Front: a boundary between 2 air masses Warm air and cold air do not mix well. Changes in weather occur along fronts. 4 Types of fronts: Cold Front Warm front Stationary front Occluded front. 1. Cold Front Occurs when a cold air mass (CAM) takes over a warm air mass (WAM)

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slide2

Front: a boundary between 2 air masses

    • Warm air and cold air do not mix well.
    • Changes in weather occur along fronts.
    • 4 Types of fronts:
      • Cold Front
      • Warm front
      • Stationary front
      • Occluded front
slide3

1. Cold Front

    • Occurs when a cold air mass(CAM) takes over a warm air mass (WAM)
    • THEY BRING COLD AIR.
    • Cold air “bulldoses” underneath the warm air.
    • Cumulus and Cumulonimbus clouds occur along cold fronts.
    • Cumulonimbus clouds produce thunderstorms!
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2. Warm Front

    • Occurs when a warm air mass (WAM) overtakes a cold air mass (CAM)
    • Warm air rides up on top of the cold air.
    • W. F. BRING WARM AIR.
    • Have a “distinctive pattern of clouds” when they are coming.
      • Beginning with cirrus, followed by cirrostratus , altostratus and finally nimbostratus.
    • W.F. produce light, steady rain or snow.
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http://www.cpo.com/home/Portals/2/Media/post_sale_content/PES/simulations/sim_pes_weatherch11p263.swfhttp://www.cpo.com/home/Portals/2/Media/post_sale_content/PES/simulations/sim_pes_weatherch11p263.swf

  • http://www.phschool.com/atschool/phsciexp/active_art/weather_fronts/weather_fronts.swf
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3. Stationary front

    • Occurs when 2 air masses meet and move parallel to the front.
    • S.F. produce similar weather to a warm front.
  • 4. Occluded Front
    • Occurs when a fast moving cold front overtakes a warm front, completely lifting the warm air off the ground.
    • O.F. produces produce similar weather to a cold front.
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