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EF2 tornado in Winnebago County, Illinois

Tornado November 22, 2010 · Winnebago County, Illinois

EF2
Rating
18.1 mi
Whole path
200 yd
Path width
6
Injuries
$5.0M
Damage as recorded

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

EF0EF1EF2EF3EF4EF5Unrated

The path drawn at its surveyed width of 200 yards (0.11 mi) — zoom in and the swath grows to true scale. Other tornadoes recorded nearby that day are shown faint.

What EF2 means. On the Enhanced Fujita scale, EF2 is considerable damage: roofs torn off well-built houses, mobile homes destroyed, large trees snapped or uprooted, consistent with estimated gusts of 111–135 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

Based on an eyewitness report, a tornado touched down in the backyard of a home just west of Interstate 39, on the eastern edge of a subdivision. The tornado then blew over a school bus near the intersection of Argyle and Harlem Roads. There were six people on the bus, the driver and five children. All six people were taken to the hospital but none of the injuries were serious. The tornado then knocked down eleven electrical high tension towers just southwest of the same intersection. The tornado was likely at EF2 intensity at this time and as it crossed into Boone County.

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 Rock Cut State Park (42.3307, -88.9700).

Other tornadoes from the same storm system

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

Source: NOAA Storm Events Database, event 1244226. Narratives are written by the National Weather Service forecast office that issued the report.

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