Weather fronts are the boundaries between air masses with different characteristics such as temperature, humidity, and air pressure. An air mass is a.

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Presentation transcript:

  Weather fronts are the boundaries between air masses with different characteristics such as temperature, humidity, and air pressure. An air mass is a large parcel of air with roughly the same temperature, humidity, or pressure throughout. Different air masses tend not to mix. The clashing of two or more air masses is what causes severe storms. The front is literally the “front end” of an air mass. Movement of a front will depend largely on the conditions inside the air mass. Air masses tend to be either moist (maritime) or dry (continental) in humidity content. Temperatures are either cold (polar) or warm (tropical). The weather map symbols used for fronts are indicated above.

Four Types of Fronts Cold Fronts  A cold front forms when cold air moves underneath warm air, forcing the warm air to rise. 

Cold Front On Weather Map How can you tell which direction the front it moving from the map?

What kind of weather forms at a warm front? Four Types of Fronts Warm Fronts         - A warm front forms when warm air moves over cold air. What kind of weather forms at a warm front?

Warm Front On Weather Map How can you tell which direction the front it moving from the map?

Stationary Fronts     Where the warm and cool air meet, water vapor in the warm air condenses into rain, snow, fog, or clouds.

Occluded Fronts When a cold air mass and a cool air mass come together, the warm air caught between them is forced upward.