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EF0 tornado in McHenry County, Illinois

Tornado May 7, 2024 · McHenry County, Illinois

EF0

Rating

14.3 mi

Whole path

50 yd

Path width

$60K

Damage as recorded

NOAA records this tornado county by county. Its path ran through Boone County → McHenry County → Walworth County, Wisconsin; the totals above are for the whole tornado.

EF0EF1EF2EF3EF4EF5Unrated

The path drawn at its surveyed width of 50 yards (0.03 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 tornado that touched down in Boone County crossed into McHenry County just north of Perkins Road. The tornado produced scattered tree damage along its path. A barn collaspsed along Weidner Road. Several sheep were inside the barn when the tornado struck and two of the sheep were killed. It is at this location where the tornado was likely at peak intensity with estimated wind speeds of 85 mph. The tornado continued moving northeast and crossed into Walworth County in southern Wisconsin west of Lilja Road where a silo and barn were damaged.

The wider storm

Scattered thunderstorms moved across parts of northern Illinois during the afternoon of May 7th producing large hail, localized flooding and one tornado. Additional scattered thunderstorms developed during the evening of May 7th producing locally severe winds.

Began near Chemung (42.4670, -88.7070).

Source: NOAA Storm Events Database, event 1178613. Narratives are written by the National Weather Service forecast office that issued the report.

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