Flash Flood in Allegheny County, Pennsylvania

Flash Flood March 26, 2026 · Allegheny County, Pennsylvania

Where the report was made, with tornadoes recorded within 15 miles over the years.

What the National Weather Service wrote

The ramp from Interstate 376 onto Route 885 was closed due to flooding.

The wider storm

A southeastward moving cold front sparked thunderstorms in the afternoon and evening. Good moisture return for March pushed dew points above 60 degrees with air temperatures in the mid 70s. A 1000-1500 J/kg MUCAPE gradient nosing in from the west with potent EBWD values of 50-60 knots supported severe thunderstorms with large hail up to golf ball size, sporadic wind damage, and urban flooding with training storms.

Began near Option (40.4342, -79.9892).

Source: NOAA Storm Events Database, event 1323450. Narratives are written by the National Weather Service forecast office that issued the report.

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