Overrunning

Overrunning is characterized by a warmer air mass being lifted over a colder/more dense air mass. The most common way to see this produce winter weather in the southeast is an arctic front is pushed toward the gulf coast while the subtropical branch of the jet stream becomes active. This sub tropical jet leads to warm air moving over the cold dome and helps generate precipitation. Embedded within the southwest flow aloft we will see a few weak impulses and surface lows that will help generate areas of enhanced precipitation. 

 

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