Flash Flood in Armstrong County, Pennsylvania

Flash Flood May 4, 2025 · Armstrong County, Pennsylvania

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

What the National Weather Service wrote

Road flooding was reported in the area via mPING.

The wider storm

Upper level low pressure was situated over the Middle Ohio Valley on May 4th. Spokes of mid-level vorticity rotating around the low supported the development of showers and thunderstorms. Although most of the activity remained sub-severe, there was one strong storm that generated a number of large hail reports between one and 2.5 inches in diameter, particularly in Indiana County. Later in the evening, additional slow-moving storms in weak overall flow led to several reports of flash flooding, with pockets of 2 to 3 inches of rainfall in a short period.

Began near Godfrey (40.6700, -79.6300).

Source: NOAA Storm Events Database, event 1265378. Narratives are written by the National Weather Service forecast office that issued the report.

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