Delaware, New Jersey, Pennsylvania Severe Flash Flood Warning | Effective 07-21-2026 13:38

Headline: 
Flash Flood Warning issued July 21 at 4:38PM EDT until July 21 at 8:45PM EDT by NWS Mount Holly NJ
Event: 
Flash Flood Warning
Urgency: 
Immediate
Effective: 
July 21, 2026 - 1:38pm
Expires: 
July 21, 2026 - 5:45pm
Description: 
FFWPHI The National Weather Service in Mount Holly has issued a * Flash Flood Warning for... Northern New Castle County in northern Delaware... Northwestern Burlington County in southern New Jersey... Northwestern Camden County in southern New Jersey... Northwestern Gloucester County in southern New Jersey... Northwestern Salem County in southern New Jersey... Southeastern Chester County in southeastern Pennsylvania... Delaware County in southeastern Pennsylvania... Southern Montgomery County in southeastern Pennsylvania... Philadelphia County in southeastern Pennsylvania... * Until 845 PM EDT. * At 438 PM EDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Up to 0.5 inches of rain have fallen. The expected rainfall rate is 1 to 2 inches in 1 hour. Additional rainfall amounts of 1 to 2 inches are possible in the warned area. Flash flooding is ongoing or expected to begin shortly. HAZARD...Life threatening flash flooding caused by thunderstorms. SOURCE...Radar. IMPACT...Life threatening flash flooding of creeks and streams, urban areas, highways, streets, and underpasses. * Some locations that may experience flash flooding include... Philadelphia, Camden, Wilmington, Newark, Gloucester City, Chester, Deptford, West Deptford, Pennsville, Bellmawr, Yeadon and Westtown. This includes the following highways... Interstate 295 in New Jersey between mile markers 0 and 27. Interstate 476 in Pennsylvania between mile markers 0 and 14. New Jersey Turnpike between exits 1 and 2. Interstate 76 in Pennsylvania between mile markers 336 and 351. Interstate 95 in Pennsylvania between mile markers 0 and 32. Interstate 676 in Pennsylvania between mile markers 0 and 1. Interstate 676 in New Jersey between mile markers 0 and 4. Interstate 76 in New Jersey between mile markers 0 and 3. Interstate 95 in Delaware between mile markers 0 and 23.
Instruction: 
Turn around...don't drown when encountering flooded roads. Most flood deaths occur in vehicles.
SNM: AVISO DE INUNDACIONES REPENTINAS hasta 8:45 PM EDT. Evite areas inundadas.
Servicio Nacional de Meteorologia: AVISO DE INUNDACIONES REPENTINAS en efecto para esta area hasta las 8:45 PM EDT. Esta es una situacion peligrosa y amenaza la vida. No intente viajar a menos que sea para abandonar un area propensa a inundaciones o bajo una orden de desalojo.
Area Description: 
New Castle, DE; Burlington, NJ; Camden, NJ; Gloucester, NJ; Salem, NJ; Chester, PA; Delaware, PA; Montgomery, PA; Philadelphia, PA
Forcast Office: 
NWS Mount Holly NJ