After a low of 22 this morning at Philly International Airport we reached a high of 35 with sunshine and a few high clouds; Southeastern NJ reached the lower 40s DESPITE a mostly cloudy afternoon! How did that happen? Warm Air Advection(warmer air pushing into a region of colder air) due to a "changing of the guard" with respect to high pressure(one pushed offshore while another to the west is moving in).
There will be high clouds pushing in overnight from the southwest in advance of a coastal low(that will pass us by to the southeast) with lows around 20, but we shall stay dry for the most part on Saturday. There will be another piece of energy sliding across Central PA which should be dry for the most part, but a few flurries could be possible the late afternoon into the evening. Regardless highs will be in the middle 30s.
Overnight Saturday into Sunday we'll still have clouds around as not only will the low and the shortwave push away, but a fast-moving clipper works in for Sunday. Lows will be in the upper 20s and Sunday will be in the middle 30s once again with a better shot of seeing a widespread inch or so of measurable snowfall.
Behind the clipper highs once again dip below the freezing mark thanks to a reinforcing shot of cold Canada air and this will be the case for not only Monday but Tuesday as well(with overnight lows on either side of 20). Wednesday's tranquil during the day, but then clouds push in from the south as there is a more potent system riding along the coast.
Temperatures will be warming to above freezing on Wednesday and then overnight lows will be around freezing to lead with temperatures by the end of the week approaching 40....SO that means we could have a "slop fest" on our hands toward the end of the week(snow to sleet to rain).
Let's not fret right now and take one storm at a time. You can check out the rest of the seven day(any time) at www.scottderekwx.com/forecast.html.