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.

Bands of lake effect snow pounding the Tug Hill plateau today are expected to drift south late this afternoon, bringing 3 to 7 inches of snow to much of Central New York through Thursday. More than 3 feet of snow could fall in the traditional lake effect bull’s eye of Tug Hill.