NWS Pittsburgh PAFF.W 0136September 4, 2026
Flash Flood Warning: Jefferson, Allegheny, Washington County and 2 more, OH and PA
The National Weather Service office in Pittsburgh issued a flash flood warning for Jefferson, Allegheny, Washington County and 2 more in Ohio, Pennsylvania, West Virginia, which was in force until 5:45 a.m. local time on September 4. It was the 136th flash flood warning the NWS office in Pittsburgh issued in 2026. Ohio had 62 flash flood warnings in September 2026, against 3 in an average September of 2008-2025 (Ohio'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
- Jefferson, Allegheny, Washington County and 2 more
- State
- Ohio
- Level
- Warning
- Issued
- 2:40 a.m. EDT, September 4, 2026
- Expires
- 5:45 a.m. EDT, September 4, 2026
- CAP severity, certainty, urgency
- Severe, Likely, Immediate
- VTEC event
- KPBZ FF.W 0136
- Official source
- National Weather Service: the notice at its source
Flash Flood Warnings in Ohio since 2008Every warning type in Ohio
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... Northeastern Jefferson OH County in east central Ohio... Southern Allegheny County in southwestern Pennsylvania... Central Washington County in southwestern Pennsylvania... Brooke County in northern West Virginia... Hancock County in northern West Virginia... * Until 545 AM EDT. * At 240 AM EDT, Doppler radar indicated thunderstorms producing heavy rain along a line from 10 miles southwest of Wellsville to 7 miles south of McMurray, moving southeast at 35 mph. Up to 1 inch of rain has fallen. Additional rainfall amounts up to 1 inch 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... Mount Lebanon, Bethel Park, McMurray, Weirton, Washington, Canonsburg, Gastonville, Baldwin, Upper St. Clair, Scott Township, Whitehall, South Park Township, Cecil-Bishop, Jefferson Hills, Castle Shannon, Pleasant Hills, Clairton, Bridgeville and Toronto.
What the agency told people to do
Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be especially cautious at night when it is harder to recognize the dangers of flooding.
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.