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Weather Around the World. Weather Fronts. Weather Fronts…. Weather Fronts. The boundary of air masses of different temperatures When 2 different air masses meet, they do not usually mix together, but crash into each other 4 Types of weather fronts: Cold fronts Warm fronts

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Weather fronts2
Weather Fronts

  • The boundary of air masses of different temperatures

  • When 2 different air masses meet, they do not usually mix together, but crash into each other

  • 4 Types of weather fronts:

    • Cold fronts

    • Warm fronts

    • Stationary fronts

    • Occluded fronts


Cold front
Cold Front

  • Cold Fronts:

  • Temperature is lower behind a cold front

  • Cold air pushes warm air higher

  • Precipitation (rain or snow) usually occurs at a cold front when warm air is pushed up

  • http://www.mesoscale.iastate.edu/agron206/animations/05_cnWfronts.html


Warm front
Warm Front

  • Warm Front:

  • Warm air pushes up higher as it passes colder air

  • Clouds are seen high in the sky

  • Rain is possible when the warm air over the cold air cools and condenses.


Stationary front
Stationary Front

  • Stationary front:

  • Cold front and a warm front meet and they don’t move

  • Usually has the same weather as a warm front-high clouds with some chance of rain once the warm air cools and condenses.


Occluded front
Occluded Front

  • Occluded front:

    • Occurs when a cold front overtakes a warm front

    • This happens because cold fronts move faster than warm fronts

    • Both fronts are moving in the same direction-the cold front catches up to the warm front



Low pressure high pressure
Low Pressure/High Pressure

Low Pressure (L): Air rises and cools

  • forms clouds because of condensation

  • Rain is likely

  • http://www.juicygeography.co.uk/downloads/flash/lowpressure.swf

    High Pressure (H): Air sinks and warms

  • Clouds disappear

  • No Rain

  • http://www.juicygeography.co.uk/downloads/flash/highpressure.swf


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