Hail in Williamson County, Illinois

Hail May 20, 2025 · Williamson County, Illinois

0.88 in

Hail diameter

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

What the National Weather Service wrote

Two reports of nickel sized hail were made in Johnston City.

The wider storm

A cold frontal passage pushed through Southern Illinois near sunset, resulting in scattered thunderstorms. One of these storms produced nickel size hail in Johnston City. MLCAPE values were around 1000J/kg, DCAPE was 800-1000J/kg, and effective bulk shear had dropped to below 30kts, while dewpoints ahead of the front were in the mid to upper 60s.

Began near Johnston City (37.8192, -88.9358).

Source: NOAA Storm Events Database, event 1272048. Narratives are written by the National Weather Service forecast office that issued the report.

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