A very warm air mass will remain over the Philadelphia and New York City metropolitan areas through Wednesday afternoon.
A cold front will approach from the west but will collapse before reaching the New York City and Philadelphia metropolitan areas. The fog over the region will lift by 10 AM giving way to scattered cloud cover and winds from the west at 5 mph. Temperatures will rise into the mid to upper 50s over the interior and lower to mid 60s along the coast.
The unseasonably warm conditions will continue tonight on through tomorrow with scattered cloud cover and winds from the southwest at 5 to 10 mph. Fog will redevelop in some locations in the morning hours with visibility falling below 2 miles at times. Temperatures will range from the mid 40s to lower 50s for lows and upper 50s to mid 60s for highs.
A much stronger cold front will move through the region on Wednesday with scattered showers in the morning followed by clearing skies in the afternoon. As winds shift to the northwest at 5 to 15 mph, temperatures will fall through the afternoon hours. Temperatures will range from the upper 40s to lower 50s in the morning and rebound into the upper 50s to lower 60s for early afternoon highs. Temperatures will fall through the 40s in the afternoon.
High pressure will produce chilly yet dry conditions on Thursday. Temperatures will return to near normal levels with lows in the upper 20s to lower 30s and highs in the lower to mid 40s. The high pressure system will shift off the coast on Friday and Saturday with scattered cloud cover and near normal temperatures. Temperatures will range from the mid to upper 30s for lows and mid 40s to lower 50s for highs.
A warm front will move through the region on Sunday with scattered showers and warmer temperatures. Temperatures will range from the upper 30s to lower 40s for lows and lower to mid 50s for highs.