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EF1 tornado in Mercer County, Illinois

Tornado June 3, 2025 · Mercer County, Illinois

EF1

Rating

1.6 mi

Path length

175 yd

Path width

EF0EF1EF2EF3EF4EF5Unrated

The path drawn at its surveyed width of 175 yards (0.10 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

This EF1 tornado with peak estimated wind speed of 100 MPH developed over New Boston and persisted for a short time after departing town to the northeast. Concentrated damage in town included a roof blown off a downtown masonry building and numerous trees uprooted or snapped.

The wider storm

In the late afternoon of June 3rd, a line of thunderstorms developed in northeast Missouri, and spread into far southeast Iowa and Illinois. These storms rapidly became severe. The thunderstorms quickly moved northeast across southeast Iowa, west central, and northwest Illinois between 530 PM and 8 PM CDT. This line of storms produced 8 tornadoes, along with isolated pockets of higher end wind damage from estimated winds of 80 to 100 mph. A cluster of several tornadoes moved into the the southern portions of the Quad Cities IA/IL metro area, producing EF1 damage into Moline Illinois.

Began near New Boston (41.1700, -91.0000).

Other tornadoes from the same storm system

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

EF1 Mercer County EF1 Warren County EF1 Rock Island County EF1 Rock Island County EF1 Rock Island County

Source: NOAA Storm Events Database, event 1261651. Narratives are written by the National Weather Service forecast office that issued the report.

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