Severe Thunderstorm Warnings and Flash Flood Alerts in Western Pennsylvania
Severe Thunderstorm Warnings and Flash Flood Alerts in Western Pennsylvania
US · Published Sep 4, 2026
• Western Pennsylvania is experiencing a Severe Weather Alert Day due to scattered strong to severe thunderstorms, heavy downpours, and flash flooding. The National Weather Service has issued flash flood warnings for several counties, including Allegheny, Westmoreland, and Butler. Rainfall totals between 1.5 and 3 inches have already been recorded as of 10:00 PM EDT on Thursday, September 3,
• The storms are accompanied by hot and humid conditions, with a high of 89°F (32°C) expected today. The severe weather is expected to continue into Friday morning, with additional showers and storms likely before noon.

Impact & Risks

The severe weather poses risks of damaging winds, large hail, and flash flooding in the affected areas. Communities such as Pittsburgh, Monroeville, Greensburg, and Mt. Lebanon are among those at risk of flash flooding. Flooded roads are a significant hazard, as most flood-related fatalities occur in vehicles. Residents in low-lying areas and near water bodies should remain vigilant and prepared for potential flooding.

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