PITTSBURGH — (WPXI) – Grab the umbrella as you head out Thursday and gear up for the first round of weather impacts from a major winter storm. Showers may start as a brief mix north of Pittsburgh with a longer period of ice east and in the ridges. The next round of impacts comes as a powerful cold front arrives before sunrise Friday rapidly turning rain to snow showers and dropping temperatures nearly 30 degrees in two hours. Wet roads will freeze very easily causing a skating rink impact Friday morning for commuters. As temperatures drop into the single digits during the day wind chills will head below zero. Wind chills will say below zero into Christmas day with winds gusting to 50 mph at times Friday night and Saturday.