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 parts of Texas brace for Winter Storm Cora, freezing temperatures threaten plumbing. Here's how to protect pipes during freeze warnings.