A weak cold front has dropped south of the Philadelphia and New York City metropolitan areas this morning, transporting a weak Polar air mass into the region. However, as a storm intensifies over Texas and the Gulf Coast this morning, warm air will surge northward to provide unseasonably warm conditions to much of the eastern United States through this weekend.
Clouds will increase through the day today with winds backing from the northwest to southwest at 5 to 15 mph with gusts up to 25 mph. Temperatures will rise into the lower to mid 40's over the interior and upper 40's to lower 50's along the coast and in urban locations.
Tonight, variable to overcast skies can be expected with winds from the southwest at 5 to 15 mph. Clouds will continue to increase through the day tomorrow with scattered showers developing in the afternoon and evening as a warm front presses north. Temperatures will only fall into the upper 20's to lower 30's over the interior and mid 30's along the coast for morning lows. High temperatures will rise into the mid to upper 40's throughout the Philadelphia and New York City metropolitan areas.
As the low pressure system lifts into the Great Lakes and weakens, high pressure off the Southeast coast will continue to pump warm air from the Gulf of Mexico right up the East coast. With scattered to variable clouds expected, temperatures will rise to above normal levels through the weekend. Only a few isolated to widely scattered showers will be a threat. Low temperatures will range from the lower to mid 40's through the period. High temperatures will rise into the mid to upper 50's, which is around 20 degrees above normal for this time of year.
A slow moving Arctic cold front will begin to press south towards the Philadelphia and New York City metropolitan areas on Monday with periods of rain possible. The majority of the region will remain on the warm side of the cold front on Monday with temperatures in the upper 40's to lower 50's for lows and mid 50's for highs. On Tuesday and Wednesday, the cold front will press south with periods of rain, mixing with snow at times. Temperatures will be highly volatile but slowly falling through the period through the 40's and 30's. Locations to the north of the cold front will fall into the 30's while locations south of the warm front will hold in the 40's or even 50's. A significant thermal gradient throughout the region is possible.