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NWS Pittsburgh PAFF.W 0132September 3, 2026

Flash Flood Warning: Allegheny, Armstrong, Indiana County and 1 more, PA

The National Weather Service office in Pittsburgh issued a flash flood warning for Allegheny, Armstrong, Indiana County and 1 more in Pennsylvania, which was in force until 9:45 p.m. local time on September 3. It was the 132nd 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

Issued6:38 p.m. EDT, September 3, 2026
In force6:38 p.m. EDT, September 3, 2026
Expired9:45 p.m. EDT, September 3, 2026

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, Armstrong, Indiana County and 1 more
State
Pennsylvania
Level
Warning
Issued
6:38 p.m. EDT, September 3, 2026
Expires
9:45 p.m. EDT, September 3, 2026
CAP severity, certainty, urgency
Severe, Likely, Immediate
VTEC event
KPBZ FF.W 0132
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... Western Westmoreland County in southwestern Pennsylvania... Southwestern Armstrong County in west central Pennsylvania... Southwestern Indiana County in west central Pennsylvania... * Until 945 PM EDT. * At 638 PM EDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Between 0.5 and 0.8 inches of rain have fallen. 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... Monroeville, Greensburg, Jeannette, Vandergrift, Apollo, Murrysville, White Oak, Irwin, Manor, Trafford, Youngwood, Delmont, West Newton, New Stanton, Leechburg, North Apollo, West Leechburg and Avonmore.

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