Parts of North Texas have already seen a significant amount of snow, with more expected in the coming hours. Snow has been falling in Denton and Collin County for a decent amount of the day, while Tarrant County and Dallas County have seen less snow. Areas like Celina and Bonham saw a reported six inches of snow by 5 p.m.

Several inches of snow began accumulating across North Texas Thursday as many people stayed home because of the winter weather. (AP Video: Kendria LaFleur)

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.

A winter storm that brought snow to Dallas and threatens the US South with ice and sleet has grounded more than 1,000 flights and is raising the risk of power outages through the region.

By Thursday night, hundreds of flights in and out of DFW Airport and Dallas Love Field had already been canceled for Friday.

Nearly half of all flights in and out of DFW International Airport and Dallas Love Field are canceled with snow and sleet falling throughout the region and more expected through Thursday. The FAA issued a ground stop for all flights departing for DFW Airport from other airports,