Severe · Flash Flood WarningThis alert has expired. It is kept for reference.

Flash Flood Warning issued September 13 at 8:31AM EDT until September 13

Affecting Mercer, NJ; Middlesex, NJ; Bucks, PA; Delaware, PA; Montgomery, PA; Philadelphia, PA

In effect until: Sep 13, 2026, 4:00 PM

Mercer, NJ; Middlesex, NJ; Bucks, PA; Delaware, PA; Montgomery, PA; Philadelphia, PA

Likely impact across 6 counties in NJ and PA; effects through 4:00 PM.

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.

Affected areas

Philadelphia

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Read the original bulletin (official text)

At 831 AM EDT, emergency management reported heavy rain in the warned
area. Flash flooding has been reported in portions of Delaware County
with related water rescues and road closures. In addition, small
creeks are running high with the Frankford Creek in Philadelphia
County rising rapidly. Between 0.5 and 2 inches of rain have fallen.
The expected rainfall rate is 0.75 to 1.75 inches 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.

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Alert data: U.S. National Weather Service / NOAA · Translation: WeatherTranslate™

Flash Flood Warning issued September 13 at 8:31AM EDT until September 13

Affected areas

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