As a warm front approaching from the Ohio Valley this morning is producing drizzle and areas of locally dense fog this morning throughout the Philadelphia and New York City metropolitan areas.
Temperatures are rapidly rising above freezing this morning and will rise into the lower to mid 40's over the interior and upper 40's to lower 50's along the coast by this afternoon. As the warm front approaches from the west and southwest, periods of rain will develop this afternoon and continue on through tonight. A cold front will follow by early tomorrow morning with additional scattered showers as temperatures fall into the mid 30's to lower 40's.
High pressure will build back into the Philadelphia and New York City metropolitan areas by tomorrow morning and continuing on through Wednesday with tranquil weather conditions. However, this high pressure system is of Pacific origin leading to mild weather conditions throughout the period. Temperatures will remain well above normal with lows in the upper 20's to mid 30's and highs in the lower 40's to lower 50's for highs with the warmest conditions along the coast.
A cold front will approach on Thursday morning with scattered rain and snow showers. An area of low pressure will develop along the cold front over the Tennessee River Valley on Thursday afternoon and approach from the southwest Thursday evening through Friday. Warm air will invade from the south with periods of rain expected through the period. Any threat of snowfall will give way to periods of rain with temperatures rising into the lower to mid 40's over the interior and upper 40's to mid 50's along the coast on Friday.
High pressure will return for Saturday with scattered cloud cover with much colder temperatures expected. Temperatures will range from the mid 20's to lower 30's for lows and upper 30's to upper 40's for highs.
An area of low pressure will produce scattered snow showers on Sunday. Temperatures will range from the upper 10's to upper 20's for lows and lower to upper 30's for highs.