Light rain and snow with temperatures hovering around freezing before dawn were bringing the potential for icy roadways before sunrise.
The National Weather Service in Pittsburgh issued a special weather statement for much of southwestern Pennsylvania, including Pittsburgh and Allegheny County, advising residents that an area of light freezing rain would be moving through the area until about 7 a.m. This precipitation could deposit a small glaze of ice, sufficient to cause untreated surfaces to become slippery.
Some light rain was observed falling in Pittsburgh and the North Hills around 4:15 a.m. Radar was showing mixed precipitation immediately to the north and some snow in Lawrence and Butler counties.
The weather service said temperatures would be rising slowly as the morning progresses.
In higher elevations from Indiana County south along the ridges of Westmoreland and Fayette counties, a winter weather advisory was in effect until 10 a.m. Rain and freezing rain in these areas are expected to bring a greater chance for ice. The weather service said while accumulations of ice will not be large, only a small amount can create hazardous travel conditions.