NORTH TEXAS – North Texas is bracing for a mix of snow and sleet. A winter storm warning went into effect Thursday morning and continues until 12 p.m. Friday. The warning includes Denton, Collin, Dallas and Tarrant counties.

Some flights that were scheduled to leave Dallas airports for Houston airports Thursday were canceled amid the snowy weather in North Texas. Aviation tracking company FlightAware shows live updates on the flight status from Dallas to Houston.

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.