Flash Flood — Allegheny, Pennsylvania

2025-07-16 · near Tarentum, Allegheny, Pennsylvania

Event narrative

Report of 6 to 9 inches of water flowing over Days Run Road as Days Run Creek is out of its banks.

Wider weather episode

A crossing cold front and weak shortwave passage spawned of scattered clusters of thunderstorms in an environment with 1500-2000 J/kg MLCAPE, >1000 J/Kg DCAPE, and weak deep layer shear. Some storms were severe with damaging wind.

View location on OpenStreetMap → (40.6160, -79.7889)

Source: NOAA Storm Events Database, event_id 1274653. Narrative written by the NWS forecast office that issued the report.