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.

Several inches of snow began accumulating across North Texas Thursday as many people stayed home because of the winter weather. (AP Video: Kendria LaFleur)

Some southern states are bracing for their biggest winter storm in several years as snow falls from the Rockies to the East Coast. On Thursday, the weathers start to deteriorate in northern and western Texas,