Residents in the Philadelphia area should brace for potential flooding as the National Weather Service in Philadelphia warns of a high chance of heavy rainfall and thunderstorms starting this afternoon. According to the forecast, showers and possible thunderstorms are expected to bring as much as three quarters to one inch of new rainfall. The downpour, paired with a humidity hovering at 90%, suggests a soupy and saturated day ahead.
The NWS has also issued a Flood Watch which remains in effect from 2 PM EDT today through late tonight for multiple counties across northern Delaware, New Jersey, and southeast Pennsylvania. Misplaced in anticipation, folks in areas like New Castle, Camden, and Philadelphia may have been addressed by the NWS notice, which states, "Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations." Urban areas with poor drainage could face significant water accumulation, with concerns that storm drains and ditches could become clogged with debris.
As the humidity ratchets up and the air lies heavy over the city, the approaching cold front drives expectations of an atmospheric upheaval. Flooding is a possibility, and the NWS advises that "Creeks and streams may rise out of their banks." Tonight brings a 90% chance of showers and thunderstorms, potentially adding another three quarters to one inch of rain to an area already soaked in summer's swelter. Friday's relief comes with a high of around 74°F but still carries a 40% chance of more showers.
A statement obtained by the National Weather Service cautions that "A very warm and humid airmass will be in place ahead of an approaching cold front." Residents, caught between the front's march and the lingering moisture, could experience flash flooding, especially where the rainfall amounts rapidly climb. The NWS reminds the public to stay alert, advising that "You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued." Misplaced by concern, the agency emphasizes the dangers of flooded roads, urging people to "Turn Around, Don`t Drown."
Looking towards the weekend, relief is in sight, with the forecast promising a sunny Saturday and a high near 81°F. After a potentially tumultuous end to the week, the break in weather might offer a chance for the region to dry out and the flood waters to recede, with similarly pleasant conditions expected into the start of next week.
