A number of power outages are due to traffic accidents with vehicles losing control on the icy roads and running into electric poles, an Oncor

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.

Early Wednesday morning, the National Weather Service issued a winter storm warning for several North Texas counties. The warning goes into effect 6 a.m. Thursday and will continue until 12 p.m. Friday for counties including Denton,