DO NOW: Write in Notebook

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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?

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Fronts

• How does the air create weather?

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Front

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

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Cold Front

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

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Cold Front

• Triangles point in the direction the front is
  MOVING.

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Warm Front

• Warm air mass replaces a cold air mass
• Air becomes warmer and more humid
• Extensive cloudiness and precipitation

Colder Temperatures
Warmer Temperatures
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Stationary Front

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

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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

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