A busy weather week with many rounds of rain for the Mid-South will bring the risk of flash flooding over the Tennessee Valley.   

The West has been very active, with heavy snow for the Rockies. 

Rain forecast Southeast US states

Rain is forecast to drench the Southeast this week. (Fox News)

The snowy weather will spread over the Northern Plains.   

Snow forecast US west

Where snow is falling in the U.S. on Monday, Dec. 3. (Fox News)

Warmer-than-average temperatures will break record highs for the South while bitter arctic air has settled into the Northern tier of the country.  

US national weather forecast

The national forecast for Monday, Dec. 5. (Fox News)

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The Northeast will see on and off rain with a chance of some snow for the end of the workweek.