Active Weather Alerts
Flash Flood Warning
Issued: 12:46 AM Aug. 21, 2026 – National Weather Service
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1030 PM EDT THIS EVENING FOR MERCER, SOUTHEASTERN BUCKS, EAST CENTRAL MONTGOMERY AND NORTHEASTERN PHILADELPHIA COUNTIES... At 846 PM EDT, local law enforcement reported flash flooding with street flooding and road closures in Willow Grove. Between 1.5 and 3.5 inches of rain have fallen. Flooding impacts will continue, but no additional rainfall is expected. Flash flooding is already occurring. HAZARD...Flash flooding caused by heavy rain. SOURCE...Law enforcement reported. IMPACT...Flash flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other poor drainage and low-lying areas. Some locations that will experience flash flooding include... Philadelphia, Trenton, Bensalem, Ewing, Princeton, Burlington, Bristol, Hatboro, Pennington, Beverly, Rockledge and New Hope. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. && FLASH FLOOD...OBSERVED
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