What to Know
- Much of the Philadelphia region was under a First Alert Thursday as slow-moving storms slammed the region.
- The storms led to flash flooding in parts of Pennsylvania and South Jersey.
- Once the front passes, expect comfortable weather this weekend.
Flooded roads and even some water rescues were reported throughout the Philadelphia area Thursday as a line of strong storms slowly moved through.
Philadelphia and most of the suburbs were under severe thunderstorm warnings and flash flood warnings at some points during the weather.
Flooding caused slowdowns on the Schuylkill Expressway (I-76) in Montgomery County and on Interstate 95 in Delaware County.
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In Caln Township, Chester County, a photo captured a group of people -- one holding a dog -- wading through floodwater behind a trapped vehicle.
Flooding also occurred in the Wissahickon Creek in Whitemarsh Township near Flourtown Road and Stenton Avenue .
In South Jersey, cars were stuck in the water on Broadway and King Street in Camden, New Jersey. SkyForce10 was also over flooding in Brooklawn Circle.
Firefly, the large music festival in Delaware, said it would not open its doors at 3 p.m. Thursday as scheduled; organizers asked concert-goers to watch Firefly's mobile app for more information.
The NBC10 First Alert weather team issued a First Alert including all of our Pennsylvania neighborhoods. Delaware, Mercer County and South Jersey suburbs are also under the First Alert, which began at 10 a.m. and continued through Thursday afternoon and evening.
The front brought periods of heavy rain and flash flooding.
Just look at the rain that came down in Delaware:
The system continued through Thursday evening, with weakening showers and storms overnight before skies cleared early Friday.
Once the cold front passes, the Delaware Valley will see sunshine, low humidity and low 70s Friday afternoon and the comfortable pattern will continue into the weekend.