NWS Mount Holly NJFF.W 0123August 20, 2026
Flash Flood Warning: New Castle, Camden, Gloucester and 5 more, DE and NJ
The National Weather Service office in Mount Holly issued a flash flood warning for New Castle, Camden, Gloucester and 5 more in Delaware, New Jersey, Pennsylvania, which was in force until 9:45 p.m. local time on August 20. It was the 123rd flash flood warning the NWS office in Mount Holly issued in 2026. Delaware had 8 flash flood warnings in August 2026, against 4 in an average August of 2008-2025 (Delaware's flash flood warnings by year).
ExpiredWarning
In force for 4.1 hours; it has expired. The agency may have replaced it with a new notice.
The notice
- Issued by
- National Weather Service, Mount Holly NJ
- Area
- New Castle, Camden, Gloucester and 5 more
- State
- Delaware
- Level
- Warning
- Issued
- 5:39 p.m. EDT, August 20, 2026
- Expires
- 9:45 p.m. EDT, August 20, 2026
- CAP severity, certainty, urgency
- Severe, Likely, Immediate
- VTEC event
- KPHI FF.W 0123
- Official source
- National Weather Service: the notice at its source
Source: National Weather Service: the notice at its source. AreaZine rebuilds this page from the agency's record; the agency's page is the one to act on. A U.S. Government work, in the public domain.
The notice as issued
FFWPHI The National Weather Service in Mount Holly has issued a * Flash Flood Warning for... Northern New Castle County in northern Delaware... 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... Southeastern Montgomery County in southeastern Pennsylvania... Philadelphia County in southeastern Pennsylvania... * Until 945 PM EDT. * At 539 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 1.5 to 2.5 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...Flash flooding caused by thunderstorms. SOURCE...Radar indicated. 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, Camden, Wilmington, Newark, West Chester, Gloucester City, Chester, West Deptford, Yeadon and Westtown.
What the agency told people to do
Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles.
Source: National Weather Service: the notice at its source. The text is the agency's, unedited. A U.S. Government work, in the public domain.