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               Wisconsin Severe Weather Response Team

           Tips and Safety

 

What are the Symbols on a Weather maps on TV.

 

And what do they mean?

 

 


 

What is a cold front?

A cold front is a boundary between two air masses, one cold and the other warm, moving so that the colder air replaces the warmer air. A cold front is represented as a blue line with the teeth pointing toward the direction on movement. 

 

What is a warm front?
A warm front is a boundary between two air masses, one cool and the other warm, moving so that the warmer air replaces the cooler air. A warm front is represented as a red line with half circles pointing toward the direction on movement.

 

What is a stationary front?
 A stationary front is a boundary between two air masses that more or less doesn’t move, but some stationary fronts can wobble back and forth for several hundred miles a day. A stationary front is represented as an alternating warm and cold front symbol. 

What is an occluded front?
An occluded front is a combination of two fronts that form when a cold front catches up and overtakes a warm front. An occluded front is represented as a purple line with teeth and half circles.
 

 

 

 

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H hi pressure

Hi pressure is associated with lowering air.

 

L  Low  pressure  

low pressure is associated with rising air