The North Texas Tollway Authority began plowing toll roads with convoys Thursday night, using motor graders and truck-mounted plows to move snow and slush to the shoulder and applying deicer. That work will continue throughout Friday as staff work 12-hour shifts.

Thursday brought snow to parts of North Texas and the Panhandle. Here are the totals, and when Texans can expect road conditions to improve.

The winter storm warning in effect for North Texas has been downgraded to a winter weather advisory, according to the National Weather Service Fort Worth. Temperatures in the Fort Worth area remain around freezing, and the precipitation could cause a small amount of additional ice to accumulate bridges and overpasses.