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EF0 tornado in Henry County, Illinois

Tornado April 20, 2025 · Henry County, Illinois

EF0
Rating
4.4 mi
Whole path
120 yd
Path width

NOAA records this tornado county by county. Its path ran through Knox County → Henry County; the totals above are for the whole tornado.

EF0EF1EF2EF3EF4EF5Unrated

The path drawn at its surveyed width of 120 yards (0.07 mi) — zoom in and the swath grows to true scale. Other tornadoes recorded nearby that day are shown faint.

What EF0 means. On the Enhanced Fujita scale, EF0 is light damage: shingles and siding peeled, gutters torn, branches broken, consistent with estimated gusts of 65–85 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

The tornado touched down about 1.5 miles northeast of Altona in Knox County (NWS central Illinois) traveling northward and proceeded north into Henry County where it destroyed two large grain bins and tossed the debris for nearly a mile to the northeast. The tornado snapped a power pole and a large tree along US Highway 34 before dissipating along N 300 Ave where it damaged an outbuilding.

The wider storm

A line of severe thunderstorms lifted north northeastward across northwest Illinois, mainly south of Interstate 80, on the evening of April 20th. This brought numerous tornadoes to the area as well as straight-line wind damage. Fourteen tornadoes occurred in northwest Illinois. 7 of them were EF-1, 5 EF-0, and 1 EF-U. The longest track tornado of the event was on the ground for 16 miles and traveled from Victoria in Knox County through Galva before lifting west of Kewanee in Henry County.

Began near Nekoma (41.1500, -90.1500).

Other tornadoes from the same storm system

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

EF1 McDonough CountyEF1 McDonough CountyEF1 Henry CountyEF1 Henry CountyEF1 Bureau CountyEF0 Warren CountyEF0 Henry CountyEF0 Henry CountyEF0 Rock Island CountyEF0 Mercer CountyEFU Henry County

Source: NOAA Storm Events Database, event 1255487. Narratives are written by the National Weather Service forecast office that issued the report.

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