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EF1 tornado in St. Clair County, Illinois

Tornado March 11, 2026 · St. Clair County, Illinois

EF1

Rating

2.6 mi

Path length

300 yd

Path width

EF0EF1EF2EF3EF4EF5Unrated

The path drawn at its surveyed width of 300 yards (0.17 mi) — zoom in and the swath grows to true scale. Other tornadoes recorded nearby that day are shown faint.

What EF1 means. On the Enhanced Fujita scale, EF1 is moderate damage: roofs badly stripped, mobile homes pushed off foundations or overturned, windows broken, consistent with estimated gusts of 86–110 mph. The rating comes from a survey of the worst damage after the storm, not from a wind measurement, so it says as much about what the tornado hit as about how strong it was.

What the National Weather Service wrote

A brief tornado touched down near Griebel Acres Road where it snapped tree trunks. The tornado travelled northeast where it completed destroyed a sheet metal outbuilding and caused major roof damage to a large farm outbuilding. It caused damage to an additional barn and home before dissipating near Dintelmann Road.

The wider storm

During the early morning of March 11th, a QLCS pushed through portions of southern Illinois. The QLCS caused thunderstorm wind damage as it passed and produced 4 tornadoes.

Began near Darmstadt (38.3306, -89.7746).

Other tornadoes from the same storm system

4 more tornadoes the National Weather Service filed under this storm episode.

EF1 Jersey County EF1 Madison County EF1 Madison County EF1 Macoupin County

Source: NOAA Storm Events Database, event 1325483. Narratives are written by the National Weather Service forecast office that issued the report.

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