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EF1 tornado in Marshall County, Illinois

Tornado June 5, 2010 · Marshall County, Illinois

EF1
Rating
35.1 mi
Whole path
100 yd
Path width
17
Injuries
$8.8M
Damage as recorded

NOAA records this tornado county by county. Its path ran through Putnam County → Marshall County → La Salle County → Livingston 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 tornado touched down 3.8 miles north-northwest of Wenona in Marshall County, just west of County Road 2900E. Several trees and powerlines were blown down before the tornado crossed into LaSalle County, which is part of National Weather Service Chicago's county warning area.

The wider storm

A stationary frontal boundary extending from southern Michigan across north-central Illinois served as the focus for severe thunderstorm development during the late afternoon and evening of June 5th. A vigorous upper-level disturbance tracking across the Upper Midwest added extra wind energy to the atmosphere, allowing supercell thunderstorms to develop along the front. Eight tornadoes were spawned by the storms, mainly along a Galesburg to Eureka line. An isolated tornado formed further south across eastern Logan and western DeWitt counties as well. No injuries were reported.

Began near Wenona (41.1005, -89.0869).

Other tornadoes from the same storm system

6 more tornadoes the National Weather Service filed under this storm episode.

Source: NOAA Storm Events Database, event 243577. Narratives are written by the National Weather Service forecast office that issued the report.

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