Major Winter Storm & Possible Polar Vortex

Winter weather is expected to impact the Southern Plains beginning late Saturday night. Snowfall amounts of 4 to 8 inches possible with this upcoming next major winter storm. Snow continuing to falling across parts of Tennessee and the southern Appalachians this evening. More wintry weather is expected throughout the day today, particularly across western North Carolina. Be sure to take precautions if traveling through this region.

Tennessee Valley to the Southern Appalachians

An upper-level closed low currently over the TN Valley will shift east, crossing the Carolinas this afternoon/evening. With energy transferring to the surface low along the Carolina coast this morning, continued heavy snow in the higher elevations is expected into this afternoon. Light to moderate probabilities for 4 or more inches after 7 AM EST is on the eastern side to the crest of the Smokies, quickly dropping off into southwest VA. Low to moderate probabilities for one or more inches then spread east onto the Piedmont broadly along the NC/VA border.


The Southern Rockies and Southern Plains to Lower Mississippi


A shortwave entering the Pacific Northwest this morning will dig southeast across the Great Basin tonight and into the Four Corners region on Saturday. As the system then shifts southeast into the southern Rockies, increasing low-level southeasterly flow sourced from the Gulf of Mexico increasing moist air advection across the region. Precipitation is forecast to continue through the overnight across portions of the Panhandle region and eastern New Mexico, with cold air aloft sufficient for snow across the region. Dynamic cooling is expected to help draw the rain-snow line farther southeast on Sunday, introducing the potential for locally moderate snowfall accumulations into portions of Northwest Texas, northern Louisiana, and southern Arkansas by Sunday evening.

Day 2.5 snow probabilities for 4 or more inches (most of which will fall in 12 hours or less) are 50 to 70 percent from east-central New Mexico arcing across the southern Texas Panhandle to northwest Texas by Day 3. Low Day 3 probabilities for 2 or more inches arc across north Texas to northern Louisiana.

72 Hour Snowfall Map CONUS

Hand Drawn 72 Hour Snowfall Map

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