Air Pressure

High and Low Pressure Areas High pressure causes air to sink Usually results in several days of clear sunny skies Air rises in low pressure areas and forms water droplets Usually results in rain and storms

Fronts Where air masses meet and do not mix

When two air masses meet, they form a… front.

During a cold front, a cold air mass catches up to a warm air mass and… pushes the warm air up quickly. Weather associated with cold fronts is… Thunderstorms

See A Cold Front Forming…. Click Here!

When cold air catches up to warm air and pushes it up and away, what is formed?... cold front The map symbol for a cold front is a curved line with small… blue spikes

From the map above, you can predict that the weather in the southern U.S. will be getting… colder

See A Warm Front Forming…. Click Here!

When warm air catches up to a cold air mass, what is formed?... warm front The map symbol for a warm front is a curved line with small… rounded knobs

When a warm air mass catches up with a cold air mass, it forms a… warm front The warm air… slides over the top of the cold air, before … pushing it away. Weather associated with warm fronts are…. Clouds and long periods of steady rain

From the map above, you can predict that the weather over the Great Lakes will be getting … warmer

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

One front overtakes another Cold front typically faster moving Can have warm and cold occluded fronts Creates Precipitation

Name the Weather Fronts