Low Pressure Centers

High Pressure Centers

Anticyclones

Air Moves outward
Replaced by descending air
What happens to this air as it descends?

Cyclones

Air moves inward
Converging, rising air
What happens to this air as it rises?

Traveling Cyclones

Wave Cyclone - forms along the Polar Front in the mid- and high-latitudes.
Tropical Cyclones
Tornadoes
Fronts:

Cold Front

Cold air mass moving into a zone occupied by a warm air mass

Warm Front

Warm air mass moving into a zone occupied by a cold air mass
Summer:
Winter:

Occluded Front

Cold Front overtakes a Warm Front
Two Types of Occluded Front
Cold-type:
Warm-type:

Dry Line

Dry air (cT) converges with moist air (mT).

Formation of a Wave Cyclone

Two large anticyclones from along the Polar Front
A low pressure trough develops between them where the winds converge.
Stationary Front forms
Low Pressure center develops.
Rotation causes the Cold Front to begin to move around the low pressure.
Cold Front overtakes the Warm Front.
Occluded Front forms.
Occluded Front breaks down.

Cyclonic Motion

Storm Tracks

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