As a cold front slowly sinks south and east this morning, areas of fog and showers will linger through this morning. This cold front will mark the start to a step down to a much colder weather pattern that could lead to more snow and ice in the very near future.
For today, the fog and showers will give way to variable cloud cover and winds shift to the northwest at 5 to 15 mph. Temperatures will hold or rise slightly into the upper 40's to lower 50's over the interior and mid to upper 50's along the coast through the early afternoon. Temperatures will then fall through the 40's and 30's this evening as the cold air filters in.
A series of low pressure system will lift northeast from the Gulf of Mexico to the New Jersey coastal waters tomorrow morning and again on Wednesday morning. The first low pressure system will focus much of the precipitation over the Philadelphia metropolitan area and southern New Jersey. While the cold front will slip south of the region, the low level cold air will hold back. As such, while temperatures will be colder with lows in the mid 30's along the coast and highs in the lower to mid 40's; the bulk of the precipitation will be a mix of rain and sleet rather than snow. Further north, drier air will be in place with only a few snow showers expected if anything with lows in the upper 20's to lower 30's and highs in the upper 30's to lower 40's.
On Wednesday, a second low pressure system will approach from the Gulf Coast with more potential for precipitation throughout the Philadelphia and New York City metropolitan areas. Again, there is some question with surface temperatures with lows in the upper 20's to lower 30's over the interior and mid 30's along the coast and highs in the mid to upper 30's over the interior and upper 30's to lower 40's along the coast. As such, while some light snow is expected to the northwest of the Philadelphia and New York City metropolitan areas, most locations can expect a mix of snow, sleet, and rain with limited accumulations of a trace to an inch. Further northwest there will be potential for snowfall accumulations of one to three inches, especially on grassy and cold surfaces.
Cold high pressure will take hold for Thursday on through Sunday with dry conditions expected. Temperatures will range from the mid 20's to lower 30's for lows and mid 30's to lower 40's for highs throughout the Philadelphia and New York City metropolitan areas.