"Temperatures remain below freezing across much of the area. Slick roads and areas of black ice will continue through the morning. Please use caution if you have to be out on the road or delay travel until temperatures warm. Slow down, use caution, and travel only if necessary this morning," states the NWS Morristown TN.

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.