New Jersey, Pennsylvania Severe Flash Flood Warning | Effective 09/13/2026 06:37

Headline: 
Flash Flood Warning issued September 13 at 9:37AM EDT until September 13 at 12:00PM EDT by NWS Mount Holly NJ
Event: 
Flash Flood Warning
Urgency: 
Immediate
Effective: 
September 13, 2026 - 6:37am
Expires: 
September 13, 2026 - 9:00am
Description: 
At 937 AM EDT, emergency management and PennDOT reported flash flooding. Several road closures have been reported in portions of Delaware, Philadelphia and Bucks counties due to flooding. Small creeks are running high in Delaware and Philadelphia counties, however are receding. Between 1 and 2.5 inches of rain have fallen. The heaviest rain continues to end from west to east across the warned area. The expected rainfall rate is 0.25 to 1 inch in 1 hour. Flash flooding is already occurring. HAZARD...Life threatening flash flooding. Heavy rain producing flash flooding. SOURCE...Emergency management reported. IMPACT...Life threatening flash flooding of creeks and streams, urban areas, highways, streets and underpasses. Some locations that will experience flash flooding include... Philadelphia, Trenton, Bensalem, Ewing, Chester, Princeton, Yeadon, Folcroft, Swarthmore, Hightstown and Jenkintown.
Instruction: 
Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be aware of your surroundings and do not drive on flooded roads.
Area Description: 
Mercer, NJ; Middlesex, NJ; Bucks, PA; Delaware, PA; Montgomery, PA; Philadelphia, PA
Forcast Office: 
NWS Mount Holly NJ
Sender: 
w-nws.webmaster@noaa.gov