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.

As forecasters call for Dallas-Fort Worth to get 3 to 6 inches of snow this week, here's a look at what snowfall is typically recorded in the area in January.