The Tennessee Valley could see some of the heaviest snowfall, with 6 inches expected on Friday. A wide swath of the country is under winter weather warnings and advisories and will see impacts including "widespread closures, treacherous travel, scattered power outages, and downed branches," the weather service said.

Snow, sleet and freezing rain predicted to fall throughout the day Thursday could spell delays at Dallas airports.

Winter Storm Cora will wring out snow and ice over a large swath of the South from Texas to Virginia through Friday night, including from Dallas-Ft. Worth and Little Rock to Nashville, Atlanta and Charlotte.