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EF0 tornado in McHenry County, Illinois

Tornado November 22, 2010 · McHenry County, Illinois

EF0

Rating

5.5 mi

Whole path

50 yd

Path width

$1.0M

Damage as recorded

NOAA records this tornado county by county. Its path ran through 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 touched down in the extreme northern part of McHenry County and then quickly moved north into Walworth County in southern Wisconsin.

The wider storm

Strong to severe thunderstorms moved across parts of northern Illinois during the afternoon hours of November 22nd. These storms produced two tornadoes, hail, heavy rain and some flooding.

Began near Big Foot Prairie (42.4932, -88.5704).

Other tornadoes from the same storm system

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

EF2 Winnebago County

Source: NOAA Storm Events Database, event 268262. Narratives are written by the National Weather Service forecast office that issued the report.

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