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EF0 tornado in McHenry County, Illinois

Tornado June 24, 2026 · McHenry County, Illinois

EF0
Rating
0.3 mi
Path length
10 yd
Path width
EF0EF1EF2EF3EF4EF5Unrated

The path drawn at its surveyed width of 10 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

A brief tornado with estimated peak winds of 75 mph touched down in a field north of Harmony Road, approximately a half mile east of Seeman Road. The tornado moved southeast causing damage to the roof of a barn and downing some tree limbs. A few metal panels from the roof of a barn were scattered approximately 200 to 300 yards away. A utility pole was damaged. The tornado ended southwest of the intersection of Harmony Road and Briar Hill Road. A video showed this brief tornado with no clear condensation funnel but swirling debris being lofted.

The wider storm

Scattered thunderstorms produced localized wind damage, localized flooding and one brief tornado during the afternoon and evening of June 24th.

Began near Harmony (42.1626, -88.4882).

Source: NOAA Storm Events Database, event 1345200. Narratives are written by the National Weather Service forecast office that issued the report.

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