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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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