4 Major types of fronts

• Stationary– A front that is not moving.

• Cold– Leading edge of colder air that is replacing warmer air.

• Warm– Leading edge of warmer air that is replacing cooler air.

• Occluded– When a cold front catches up to a warm front.

Stationary front

• Stationary is when there is no warm or cold air advancing.

• Both air masses reach at a stalemate. These conditions can last for days.

• Winds are gentle and temperature is normal.

Cold front

• These fronts form when cold air mass meets a warm air mass.

• As the front passes winds can change direction and temperature usually drops.

Warm front

• Does the opposite of a cold front.

• Temperature will rise and warm will replace the cold air.

High Pressure

• Shown on TV would be an “H” symbols on the weather channel.

• High pressure areas air is more dense than low pressure air.

moving fronts

Low Pressure

• As shown on TV an “L” symbol.

• As winds blow into low pressure the air moves upward causing it to rain.