High pressure will produce tranquil yet chilly weather conditions throughout the Philadelphia and New York City metropolitan areas through tomorrow. Winds will be from the northwest at 5 to 10 mph, putting a chill into the air. Temperatures will range from the mid to upper 40's for highs and upper 20's to lower 30's for lows. The combination of winds and cold temperatures will produce wind chills in the upper 30's to lower 40's in the afternoon.
By tomorrow evening, clouds will start to increase as an area of low pressure, currently over the central Plains, redevelops along the North Carolina coast. This low pressure system will track towards the New Jersey coastal waters by Wednesday morning. Winds will veer to the northeast at 5 to 15 mph while temperatures fall into the upper 20s to lower 30's over the interior and mid 30's along the coast.
By Wednesday afternoon, rain will spread throughout the Philadelphia and New York City metropolitan areas as the area of low pressure intensifies over the New Jersey coastal waters. The low pressure system will track towards the New England coastal waters by Thursday morning. Periods of rain can be expected along the coast with one to two inches of rain expected. Winds will back from the northeast to northwest at 15 to 30 mph with gusts over 45 mph at times. Minor to moderate coastal flooding can also be expected, especially on early Thursday morning with the high tide. In addition to the rain, snow will develop over the northern interior locations for northeastern Pennsylvania, northwestern New Jersey, the Hudson Valley, and northwestern Connecticut. Snowfall accumulations of one to three inches can be expected for most locations, locally up to six inches in northeastern Pennsylvania. Snow will also mix in towards the end of the storm even along the coast.
Temperatures will rise into the upper 30's to lower 40's over the interior and mid 40's along the coast on Wednesday and then fall into the upper 20's to lower 30's over the interior and mid 30's along the coast on Thursday morning. Temperatures will rebound into the upper 30's to lower 40's over the interior and mid to upper 40's on Thursday afternoon.
The storm will exit by Thursday afternoon with improving weather conditions expected. High pressure will take hold Thursday night through Sunday with rapidly improving weather conditions. Temperatures will moderate through the forecast period to above normal conditions. Excellent weather conditions can be expected by the weekend. Temperatures for Friday will range from the mid to upper 30's for lows and mid to upper 50's for highs. Temperatures for Saturday and Sunday will range from the upper 30's to mid 40's for lows and upper 50's to mid 60's for highs.