Possum Kingdom Lake, Palo Pinto County and all of North Texas is in the grip of an Arctic front. The National Weather Service winter storm warning remains in effect until 6 p.m. tonight, Friday. Sleet and freezing rain swept through Palo Pinto County Thursday afternoon and continued, off and on, into Friday morning. A number of county schools released students early Thursday, unsure if school would be held Friday. By Thursday night, all county schools had canceled Friday classes. The Palo Pinto County Courthouse closed shortly after 1 p.m. Thursday. That evening, Palo Pinto County Judge David Nicklas said the courthouse would be closed Friday. The Possum Kingdom East Volunteer Fire Department and EMS Auxiliary rescheduled the Saturday, Dec. 7, pre-Christmas sale for 9 a.m.-noon Saturday, Dec. 14. In addition, the Santa visit scheduled for Saturday at the Possum Kingdom Chamber of Commerce was canceled. A determination will be made if it will be rescheduled. The PK Women's Club bake sale was also canceled. Temperatures were in the low to mid 20s overnight Thursday and the high Friday predicted to be in the mid-20s. The low tonight is predicted to be near 10 with wind chills as low as 2 below. Forecasters had originally predicted a 40 percent chance of additional sleet or frozen rain Saturday night into Sunday, but that had been removed from the forecast Friday. The first above-freezing temperature is expected Sunday afternoon.