NWS Mount Holly NJFF.W 0138August 27, 2026
Flash Flood Warning: Chester and Montgomery, PA
The National Weather Service office in Mount Holly issued a flash flood warning for Chester and Montgomery in Pennsylvania, which was in force until 9:15 p.m. local time on August 27. It was the 138th flash flood warning the NWS office in Mount Holly issued in 2026. Pennsylvania had 114 flash flood warnings in August 2026, against 23 in an average August of 2008-2025 (Pennsylvania'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
- Chester and Montgomery
- State
- Pennsylvania
- Level
- Warning
- Issued
- 5:08 p.m. EDT, August 27, 2026
- Expires
- 9:15 p.m. EDT, August 27, 2026
- CAP severity, certainty, urgency
- Severe, Likely, Immediate
- VTEC event
- KPHI FF.W 0138
- Official source
- National Weather Service: the notice at its source
Flash Flood Warnings in Pennsylvania since 2008Every warning type in Pennsylvania
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 Chester County in southeastern Pennsylvania... Central Montgomery County in southeastern Pennsylvania... * Until 915 PM EDT. * At 508 PM EDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Between 1 and 2 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...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... Norristown, Phoenixville, Lansdale, West Norriton, East Norriton, Coatesville, Downingtown, Hatboro, Ambler, Collegeville, Royersford and Parkesburg.
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.
The record around this notice
- Flash Flood Warnings in Pennsylvania since 2008111 a year
- Every warning type in Pennsylvania
- Flash Flood Warning: what it means, and the states that get the most3,924 a year
- NWS notices, August 20264,574 in the month
- The latest from the National Weather Service
- Warning, watch or advisory: the three NWS levels