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Air Masses and Fronts

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Air Masses and Fronts Air Masses Air masses have the same properties as the surface over which it develops: Maritime = Wet mP = wet/cold Continental = Dry cP = dry ... – PowerPoint PPT presentation

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Title: Air Masses and Fronts


1
Air Masses and Fronts
2
Air Masses
  • Air masses have the same properties as the
    surface over which it develops
  • Maritime Wet mP wet/cold
  • Continental Dry cP dry/cold
  • Polar Cold mT wet/warm
  • Tropical Warm cT dry/warm

3
Air Masses in North America
4
Fronts
  • A front is the boundary where two air masses
    meet.
  • Types of fronts
  • Warm Front
  • Cold Front
  • Occluded Front
  • Stationary Front

WARM AIR
FRONT
COLD AIR
5
Warm Front
  • Warm air slides over departing cold air.
  • Large bands of precipitation form

6
Cold Front
  • Cold air pushes under a warm air mass.
  • Warm air rises quickly.
  • Narrow bands of violent storms form.

7
Occluded Front
  • Two cold air masses merge and force warm air
    between them to rise quickly.
  • Strong winds and heavy precipitation will occur.

8
Stationary Front
  • Warm or cold front stops moving.
  • Light wind and precipitation may occur across the
    front boundary.

9
Cyclones and Anticyclones
  • Areas of HIGH and LOW pressure
  • Cyclone LOW PRESSURE spin counterclockwise
    associated with storms and precipitation
  • Anticyclone HIGH PRESSURE spin clockwise
    associated with fair weather.

10
Cyclones and Anticyclones in the USA
11
Fronts - Video
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