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EF0 tornado in Mercer County, Illinois

Tornado April 20, 2025 · Mercer County, Illinois

EF0
Rating
0.9 mi
Path length
25 yd
Path width
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 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

This short-lived EF-0 tornado brought tree damage, including a large uprooted tree, and a small outbuilding damaged. The peak estimated winds were 85 mph.

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 New Boston (41.2000, -91.0000).

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 CountyEF1 Henry CountyEF0 Warren CountyEF0 Henry CountyEF0 Henry CountyEF0 Rock Island CountyEFU Henry County

Source: NOAA Storm Events Database, event 1255482. Narratives are written by the National Weather Service forecast office that issued the report.

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