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EF1 tornado in Hancock County, Illinois

Tornado June 17, 2026 · Hancock County, Illinois

EF1

Rating

1.5 mi

Whole path

100 yd

Path width

$75K

Damage as recorded

NOAA records this tornado county by county. Its path ran through Lee County, Iowa → Clark County, Missouri → Hancock County; the totals above are for the whole tornado.

EF0EF1EF2EF3EF4EF5Unrated

The path drawn at its surveyed width of 100 yards (0.06 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

A brief EF1 tornado uniquely tracked across three states. This developed just inside Lee County, Iowa, with peak winds of 105 mph, and tracked southeast through Clark County, Missouri. It then continued across the Mississippi River into Hancock County, Illinois, impacting northern parts of Warsaw damaging primarily trees.

The wider storm

A strong storm system for mid-June brought two rounds of thunderstorm on Wednesday June 17th. The strongest round of storms occurred during the morning hours that brough damaging winds (some significant), heavy rain, and two EF-1 tornadoes in Illinois which occurred in Monmouth and Warsaw.

Many trees fell and power lines were damaged, along with several reports of flash flooding. There were also 4-5 train cars that were pushed off the railroad just south of Monmouth, IL in Warren County due to significant straight-line winds (estimated near 100 mph). Additional train cars derailed as a result of these cars being blown off.

Began near Warsaw (40.3670, -91.4370).

Other tornadoes from the same storm system

1 more tornado the National Weather Service filed under this storm episode.

EF1 Warren County

Source: NOAA Storm Events Database, event 1337534. Narratives are written by the National Weather Service forecast office that issued the report.

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