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.

Storm Warning is now in effect for the Dallas-Fort Worth area. Meteorologists have a clearer picture of what to expect for today and tomorrow, just ahead of the big game in DFW.