A cold front stretching from South Texas up into the Lower Great Lakes will be the focus of thunderstorms Monday with some of those storms becoming severe. 

The storms also will bring the risk of heavy rainfall and isolated flash flooding.   

The severe storm threat for Monday.

The severe storm threat for Monday. (Fox Weather)

Tomorrow, the front will move East, shifting the threat of storms to the East Coast. 

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The national forecast for Monday, April 25.

The national forecast for Monday, April 25. (Fox Weather)

Temperatures on Monday will be up to 30 degrees below average for the Northern Plains and Upper Midwest into the Great Lakes.   

Temperatures will rebound later this week.