FRONTWhere air masses meet

and do not mix.

4 Types of weather fronts:

Cold Front

Occluded Front

Stationary Front

Warm Front

Cold FrontWhen a fast moving cold air mass runs into a

slow moving warm air mass and the thicker cold air slides under the lighter warmer air.

Cold Front

Thunderstorms often form as warm air is suddenly lifted up over the cold air.

A cold front symbol—The direction that the teeth point

indicate the direction the front is moving.

Warm FrontWhen a moving warm air mass collides with a slowly moving cold air mass and the warm air

moves over the cold air.

Warm Front

This can lead to hours, if not days, of wet weather.

Warm Front symbol—The directions that the bumps face is the direction the front is moving.

Video

Cold Front vs. Warm Front

Stationary FrontWhen a cold air mass and warm air mass meet,

but neither air mass has enough force to move the other air mass.

Stationary FrontRemain in the same place for several days, producing light wind and precipitation.

Stationary Front Symbol

Animation

Stationary Front

Occluded FrontWhen a warm air mass is caught between two

cooler air masses and the thicker cold air masses move underneath the thinner warm air mass and

push it upward.

Occluded Front

Occlusion means closure

Cooler weather

Occluded front symbol – The directions that the bumps face is the direction the front is moving.

Animation

Occluded Front

Which types of fronts can you find on this map?

1.

2.

3. 4.