NBC 10 warns that dropping nighttime temperatures and leftover moisture will lead to patches of black ice throughout the region until around 9 a.m.
More snow will then be on the way.
While much of the day Sunday is expected to provide a break from precipitation, forecasts are calling for a west-to-east "clipper" storm that will bring more snow heading into the work week, NBC 10 reports.
While Philadelphia only experienced 1 inch of accumulation during the first storm, some areas such as Allentown and Fleetwood received as much as 6-8 inches.
The first round of snow was of the heavy and wet variety, but Sunday night's storm, expected to arrive between 8 p.m. and 11 p.m., will coat the Delaware Valley with fluffier snowfall.
6 ABC reports the snow will likely continue into Monday morning before tailing off in the afternoon, with an expected range of 1-3 inches.