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EF1 tornado in Brown County, Illinois

Tornado October 13, 2023 · Brown County, Illinois

EF1

Rating

0.4 mi

Path length

25 yd

Path width

Injury

EF0EF1EF2EF3EF4EF5Unrated

The path drawn at its surveyed width of 25 yards (0.01 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 very weak thunderstorm amidst a multicell cluster of showers produced a tornado that caused damage to a double-wide residence, its adjacent garage, and a carport behind the home. The home experienced some roof loss. Several trees on and around the property sustained damage. The tornado was rated an EF-1 with a path length of 0.42 miles, path width of 25 yards, and maximum wind gusts of 110mph.

The wider storm

A marginally severe environment existed in northeast Missouri and west central Illinois ahead of a cold front. Multicellular convection developed in the afternoon, with the majority of cells existing as showers. One shower produced a weak tornado that damaged a home and caused one injury in west central Illinois.

Began near Gilbirds (39.9548, -90.6636).

Source: NOAA Storm Events Database, event 1148794. Narratives are written by the National Weather Service forecast office that issued the report.

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