DO NOW: Write in Notebook

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Presentation transcript:

DO NOW: Write in Notebook Which type of air mass would form near the equator? What kind of winds blow across our latitudes? Does dense air rise or sink?

How does the air create weather? Fronts How does the air create weather?

Front The boundaries between air masses A front is defined as the transition zone between two air masses of different density.

Cold Front Colder Warmer Temperatures Cold air mass is replacing a warmer air mass Temperatures can drop 15 degrees Clouds, showers, and sometimes thunderstorms associated with cold fronts Warmer Temperatures Colder

Cold Front Colder Warmer Temperatures Triangles point in the direction the front is MOVING. Warmer Temperatures Colder

Warm Front Colder Temperatures Warmer Temperatures Warm air mass replaces a cold air mass Air becomes warmer and more humid Extensive cloudiness and precipitation Colder Temperatures Warmer Temperatures

Stationary Front A front that is not moving Cold and warm air masses meet

Occluded Front A cold front catches up to a warm front and overtakes the warm front Precipitation common on both sides of an occluded front

Low Pressure Area High Pressure Area “HAPPY” Weather “LOUSY” Weather (Clear/Calm) Sinking Air “LOUSY” Weather (Cloudy/Precip) Rising Air