The upcoming snow, sleet, and freezing rain....oh, and rain event for the region is a rather difficult forecast to pin down, especially if you are in the city and the immediate suburbs. I think the farther north and west you are the easier this forecast is to pin down...and for the snow starved, the happier they will be.
Precipitation will move into the region overnight Friday into Saturday, likely in the 1-4 AM time frame. Initially starting as snow, precipitation will gradually change over to a myriad of precipitation types based on location, surface temperature, and more. Temperatures aloft will moderate above the freezing point in some locations and this moderation in temperatures should occur relatively early on especially from the PA Turnpike on south...when temperatures aloft rise above freezing a transition to icy rain or sleet may take place. The question is how quickly that moderation in temperature takes place at the surface. If surface temperatures remain below freezing we could see rain freeze on surfaces or have a bunch of sleet pinging around. Given that there will be some subfreezing air out there to deal with at the surface you're going to have some issues with icing in parts of the region.
South/east of I-295, you'll see the snow transition over to rain, with a shortened period of icy rain in between. You should be rain by 7 AM in most of South Jersey although temperatures won't be much above freezing in this event.