Flash Flood in Calhoun County, Illinois

Flash Flood July 27, 2025 · Calhoun County, Illinois

$50K

Damage as recorded

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

What the National Weather Service wrote

The Calhoun County sheriff reported at least 5 trees across roads around Hamburg. The closed roads in the county include Route 100, Michael Hamburg Road, Treshman Hollow Road, Irish Hollow Road, Gresham Hollow Road, East Panther Creek Road, and Indian Creek Hollow Road. Several of these roads were closed due to pavement or culverts being washed out.

The wider storm

During the night of July 26th-July 27th, moisture convergence along a low-level jet spurred convection in eastern Missouri. This convection developed in an environment primed for efficient and heavy rainfall. Thunderstorms trained over Calhoun County, causing roads to flood and culverts to wash out.

Began near Belleview (39.3188, -90.8055).

Source: NOAA Storm Events Database, event 1278132. Narratives are written by the National Weather Service forecast office that issued the report.

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