EF0 Tornado — Clarion, Pennsylvania

2025-06-09 · near Waterson, Clarion, Pennsylvania

Event narrative

A mature mesocyclone developed over Clarion County at roughly 5pm

on June 9th, 2025. Mid level rotation intensified as the storm

grew stronger, until eventually, a brief tornado touched down near

Bush Run Road in Waterson, PA in Clarion County. Most damage was

to hardwood trees. One tree fell on a garage, collapsing the

structure. Winds were observed in a narrow swath and trees fell in

a convergent pattern for roughly a quarter of a mile. The damage

was consistent with a brief EF0 tornado lasting only a couple of

minutes.

Wider weather episode

An organized line of convection crossed the region, with 40-45 knots of unidirectional shear out of the southwest. This along with 100-1500 J/kg of surface-based CAPE resulted in severe weather across the region.

View location on OpenStreetMap → (41.1774, -79.3066)

Source: NOAA Storm Events Database, event_id 1279119. Narrative written by the NWS forecast office that issued the report.