Hail in Clarion County, Pennsylvania

Hail May 13, 2026 · Clarion County, Pennsylvania

1 in

Hail diameter

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

The wider storm

Mid-afternoon thunderstorms both in broken line segments and single cells developed along and ahead of a cold front. Marginal effective shear values up to 30 knots and MLCAPE of 500-1000 J/kg supported severe thunderstorms producing both wind and hail. Wind was primarily confined to northern West Virginia along a DCAPE gradient of 600-700 J/kg. Mid-level lapse rates up to 6.5 C/km and up to 300 J/kg of hail growth zone CAPE supported numerous reports of quarter size within storms across western Pennsylvania.

Began near Clarion (41.2121, -79.3868).

Source: NOAA Storm Events Database, event 1336872. Narratives are written by the National Weather Service forecast office that issued the report.

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