NWS Pittsburgh PAFF.W 0141September 12, 2026
Flash Flood Warning: Allegheny, Washington County and Westmoreland, PA
The National Weather Service office in Pittsburgh issued a flash flood warning for Allegheny, Washington County and Westmoreland in Pennsylvania, which was in force until 7:00 p.m. local time on September 12. It was the 141st flash flood warning the NWS office in Pittsburgh issued in 2026. Pennsylvania had 43 flash flood warnings in September 2026, against 12 in an average September of 2008-2025 (Pennsylvania's flash flood warnings by year).
ExpiredWarning
In force for 3.1 hours; it has expired. The agency may have replaced it with a new notice.
The notice
- Issued by
- National Weather Service, Pittsburgh PA
- Area
- Allegheny, Washington County and Westmoreland
- State
- Pennsylvania
- Level
- Warning
- Issued
- 3:55 p.m. EDT, September 12, 2026
- Expires
- 7:00 p.m. EDT, September 12, 2026
- CAP severity, certainty, urgency
- Severe, Likely, Immediate
- VTEC event
- KPBZ FF.W 0141
- 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
FFWPBZ The National Weather Service in Pittsburgh has issued a * Flash Flood Warning for... Southeastern Allegheny County in southwestern Pennsylvania... East Central Washington County in southwestern Pennsylvania... West Central Westmoreland County in southwestern Pennsylvania... * Until 700 PM EDT. * At 355 PM EDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Between 0.5 and 1 inch of rain has fallen. The expected rainfall rate is 0.75 to 1.5 inches in 1 hour. Additional rainfall amounts of 1 to 1.5 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... Pittsburgh, Penn Hills, Mount Lebanon, Monroeville, McKeesport, Plum, West Mifflin, Baldwin, Murrysville, Wilkinsburg, Whitehall, Munhall, Jefferson Hills, North Versailles, Brentwood, Swissvale, Dormont, Castle Shannon and Pleasant Hills.
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, September 20262,824 in the month
- The latest from the National Weather Service
- Warning, watch or advisory: the three NWS levels