Philly saw some snow showers on Tuesday thanks to a short wave(piece of energy in the mid-level of the atmosphere). Officially at the airport(well, technically in National Park, NJ)there was a trace of snow recorded, but we still reached a high of 35(with sunshine) after a low of 26.
Overnight it will cloud up once again ahead of another short wave currently across the Midwest. Lows will be in the lower 20s as snow will begin by 3am or so from west to east. This means that tomorrow's morning commute may be slippery as roadways are cold enough to allow snow to stick, but not much accumulation is expected in the city(less than an inch); further south and east there is a Winter Weather Advisory in effect from 4am-1pm as there may be a couple of inches of snow that will cause travel difficulties in the morning. This is fast moving and in fact we'll break out in sunshine in the afternoon with highs around the freezing mark. The issue then will be a gusty westerly wind between 15-20mph keeping the wind chill into the lower 20s.
On Thursday we'll have yet another shortwave pass around the region, but the precipitation shall stay to the north; granted we'll still have clouds, but at least we stay dry with highs in the upper 30s. Behind that short wave is another blast of Arctic air so highs on Friday will barely reach 30 despite plenty of sunshine and by Saturday we'll cloud up in the afternoon with an approaching cold front as highs will be in the middle 30s.
As for the weekend we will have waves of low pressure riding along a boundary, but at least we shall be in the lower and middle 40s which will ensure all rain(maybe some snow to a mix to start, but milder air will win over quickly Sunday morning), but further north and west in higher elevations may be dealing with some plowable heavy wet snow.
Remember that you can check the rest of the 7-day forecast(any time) at www.scottderekwx.com/forecast.html.