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Now: A cold front has slipped south of Philadelphia but temperatures are still mild, with temperatures generally in the low to mid 70’s across the Delaware Valley this afternoon. Rainfall is scattered along the front and is moving east, with more concentrated areas of rainfall farther to the west over the Ohio Valley. This heavier rainfall will move into the region later tonight, setting the stage for a very soggy Friday.
Tonight: As this heavier rain, in association with a low pressure center in the Ohio Valley, moves into the region we will see the scattered rain becoming more widespread and pick up in intensity later tonight. Temperatures will drop into the 50’s from Philadelphia on north, with low 60’s across some portions of Delaware and South Jersey to the south of the frontal boundary. Winds will vary based on your location along the front, with northeast winds developing north of the cold front/low and south winds to the south of it.
Friday: The weather on Friday will be for the ducks as rain, heavy at times continues through much of the day before ending late from southwest to northeast. Temperatures will be chilly for this time of the year, with 50’s across Pennsylvania except the immediate Philadelphia area where it might crack 60. Temperatures in South Jersey will rise into the low and mid 60’s, with mid to upper 60’s across Delaware for a time. Temperatures will fall south/east of Philadelphia in the afternoon once the low clears your area and winds swing around from the Atlantic. I will have more on specific rainfall amounts later this afternoon and early evening.
Saturday will be cool and breezy, but increasing sunshine will help temper the chill in the afternoon. Another storm system (a parade of lows is in the offing over the next few weeks) will be bringing another round of rain Sunday night and Monday night to the Delaware Valley, with another one to two inches being thrown around in computer model guidance for the Monday storm. Ark building may become a tradition around here before Monday is out.
If you’re not dodging raindrops or rafts in tomorrow’s rainfall, the Philadelphia Chapter of the American Meteorological Society will be hosting Bill Read, the new director of the National Hurricane Center down in Miami. The Philadelphia AMS meets at the University of Delaware in Newark.
A federal judge ruled last week that the Army Corps of Engineers can be held liable for flood damage caused by a navigation channel that is believed to have funneled Hurricane Katrina’s storm surge into New Orleans in 2005.
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