EF1 Tornado — Mercer, Illinois

2025-06-03 · near New Boston, Mercer, Illinois

1.6 mi

Path length

175 yds

Path width

Event narrative

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.

Wider weather episode

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.

View location on OpenStreetMap → (41.1700, -91.0000)

Source: NOAA Storm Events Database, event_id 1261651. Narrative written by the NWS forecast office that issued the report.