EF0 Tornado — Mercer, Illinois

2025-04-20 · near New Boston, Mercer, Illinois

0.9 mi

Path length

25 yds

Path width

Event narrative

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.

Wider weather episode

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.

View location on OpenStreetMap → (41.2000, -91.0000)

Source: NOAA Storm Events Database, event_id 1255482. Narrative written by the NWS forecast office that issued the report.