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NWS Pittsburgh PASV.W 0334September 3, 2026

Severe Thunderstorm Warning: Butler, Lawrence and Mercer, PA

The National Weather Service office in Pittsburgh issued a severe thunderstorm warning for Butler, Lawrence and Mercer in Pennsylvania, which was in force until 5:30 p.m. local time on September 3. It was the 334th severe thunderstorm warning the NWS office in Pittsburgh issued in 2026. Pennsylvania had 159 severe thunderstorm warnings in September 2026, against 30 in an average September of 2008-2025 (Pennsylvania's severe thunderstorm warnings by year).

ExpiredWarning

Issued4:55 p.m. EDT, September 3, 2026
In force4:55 p.m. EDT, September 3, 2026
Expired5:30 p.m. EDT, September 3, 2026

In force for 35 minutes; it has expired. The agency may have replaced it with a new notice.

The notice

Issued by
National Weather Service, Pittsburgh PA
Area
Butler, Lawrence and Mercer
State
Pennsylvania
Level
Warning
Issued
4:55 p.m. EDT, September 3, 2026
Expires
5:30 p.m. EDT, September 3, 2026
CAP severity, certainty, urgency
Severe, Observed, Immediate
VTEC event
KPBZ SV.W 0334
Official source
National Weather Service: the notice at its source

Severe Thunderstorm 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

SVRPBZ The National Weather Service in Pittsburgh has issued a * Severe Thunderstorm Warning for... Southeastern Mercer County in northwestern Pennsylvania... Northern Butler County in west central Pennsylvania... Central Lawrence County in western Pennsylvania... * Until 530 PM EDT. * At 455 PM EDT, severe thunderstorms were located along a line from 6 miles southwest of Grove City to over New Castle, moving east at 30 mph. HAZARD...Two inch hail and 70 mph wind gusts. SOURCE...Radar indicated. IMPACT...People and animals outdoors will be injured. Expect hail damage to roofs, siding, windows, and vehicles. Expect considerable tree damage. Wind damage is also likely to mobile homes, roofs, and outbuildings. * Locations impacted include... New Castle, Grove City, Shanor-Northvue, Slippery Rock, New Wilmington, Oakwood, New Castle Northwest, Prospect, Plain Grove Township, South New Castle, West Liberty, Harlansburg, Portersville, West Sunbury, Volant, Cooper's Lake Campground, Rose Point Park, McConnells Mill and Moraine State Park.

What the agency told people to do

Anyone outdoors should move to shelter inside a well-built structure and stay away from windows. These storms are capable of producing widespread damaging winds and dangerous hail. Tornadoes can develop quickly from severe thunderstorms. Seek shelter immediately in an interior room on the lowest floor of a well-built structure.

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