A powerful cold front will drive through the Philadelphia and New York City metropolitan areas today with periods of very heavy rainfall and embedded thunderstorms. However, once this cold front drives through, excellent weather conditions are on the way for several days!
Periods of moderate to very heavy rainfall can be expected through this evening as a cold front slowly marches east through the Philadelphia and New York City metropolitan areas. The strongest embedded thunderstorms will be capable of wind gusts over 40 mph, very heavy downpours, occasional lightning, and localized urban flooding. Rainfall amounts of one to three inches can be expected. Winds will veer from the southeast to southwest at 10 to 20 mph. Temperatures will rise into the lower to mid 70's for highs by this afternoon throughout the region.
Tonight, the rain will linger and end from west to east as the cold front drives through the region. The rain will end by early tomorrow morning. Winds will veer to the northwest at 10 to 20 mph. Temperatures will fall into the lower to mid 50's throughout the entire region.
The Philadelphia and New York City metropolitan areas will be sandwiched in between a strong upper level low over the Atlantic Ocean and a strong high pressure system over the Great Lakes and Plains tomorrow on through Thursday. This pattern will lead to a persistent northwesterly wind at 5 to 15 mph through the period and keep disturbances in the forecast through next week. As a result, most locations can expect scattered clouds with dry conditions. However, an isolated shower is a threat each day due to these passing disturbances. Low temperatures will range from the upper 40's to lower 50's over the interior and lower to mid 50's along the coast and in urban areas. High temperatures will range from the lower to mid 70's away from the coast and upper 60's to lower 70's along the immediate coast and over Long Island.