Flash Flood — Allegheny, Pennsylvania

2025-07-01 · near Sharpsburg, Allegheny, Pennsylvania

Event narrative

Flooding was reported in the parking lot of Saint Margaret Hospital.

Wider weather episode

A mid-level trough, embedded shortwaves, and jet exit region dynamics provided necessary lift within an environment characterized by 1.7-1.9 precipitable water values to produce heavy, slow moving showers and thunderstorms that resulted in instances of flash flooding across western Pennsylvania.

View location on OpenStreetMap → (40.4877, -79.8958)

Source: NOAA Storm Events Database, event_id 1271162. Narrative written by the NWS forecast office that issued the report.