How Do Meteorologists Predict        Weather?
Air Masses and Fronts   What causes the weather to change?•Air mass: a largebody of air thathas about thesame temperaturea...
Air Masses and Fronts• So large only 2  or 3 can cover  the U.S. at a  time• Move west to  east• Cold and warm  air masses...
What Happens When a Cold Air Mass  Pushes into a Warm Air Mass?A Cold FrontCold air, pushes warmair upward quickly. Tallst...
What Happens When a Warm Air Mass       Catches up to a Cold Air Mass?•A Warm Front•The warm airslowly rises overthe cold ...
Tracking and Predicting Weather• Keep track of  humidity, air  pressure, precipitati  on, air masses and  fronts• Speed an...
Study Jams Air Masses and Fronts
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How do meteorologists predict weather

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fronts, air masses, moving air changes weather

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How do meteorologists predict weather

  1. 1. How Do Meteorologists Predict Weather?
  2. 2. Air Masses and Fronts What causes the weather to change?•Air mass: a largebody of air thathas about thesame temperatureand humiditythroughout it•Can be warm orcold•Can have a littleor a lot ofhumidity
  3. 3. Air Masses and Fronts• So large only 2 or 3 can cover the U.S. at a time• Move west to east• Cold and warm air masses stay separate when they meet• The line where air masses meet is called a front
  4. 4. What Happens When a Cold Air Mass Pushes into a Warm Air Mass?A Cold FrontCold air, pushes warmair upward quickly. Tallstorm clouds form andmay bring heavy rain ,thunderstorms or inwinter, a snow storm.
  5. 5. What Happens When a Warm Air Mass Catches up to a Cold Air Mass?•A Warm Front•The warm airslowly rises overthe cold airforming cirrusclouds.•These arefollowed by lowerthicker clouds.•A warm front maycause rain or snowfor several days.
  6. 6. Tracking and Predicting Weather• Keep track of humidity, air pressure, precipitati on, air masses and fronts• Speed and direction of wind help predict where air masses will move
  7. 7. Study Jams Air Masses and Fronts

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