Flash Flood — Armstrong, Pennsylvania

2025-05-04 · near Godfrey, Armstrong, Pennsylvania

Event narrative

Road flooding was reported in the area via mPING.

Wider weather episode

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.

View location on OpenStreetMap → (40.6700, -79.6300)

Source: NOAA Storm Events Database, event_id 1265378. Narrative written by the NWS forecast office that issued the report.