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EF0 tornado in Woodford County, Illinois

Tornado October 11, 2021 · Woodford County, Illinois

EF0
Rating
2.5 mi
Path length
75 yd
Path width
EF0EF1EF2EF3EF4EF5Unrated

The path drawn at its surveyed width of 75 yards (0.04 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 about 3.4 miles east-southeast of Washburn along County Highway 2100 North at 4:45 PM CDT. The tornado damaged the roof and walls of a barn and a couple large trees, throwing the debris into a corn field to the northeast. It continued tracking through fields before damaging an outbuilding along County Highway 2300 North. The tornado dissipated 3.5 miles east of Washburn at 4:51 PM CDT.

The wider storm

Low pressure lifting northward through the Illinois River Valley triggered a line of strong to severe thunderstorms during the afternoon and early evening of October 11th. With the low in close proximity, ample environmental wind shear led to numerous circulations developing within the line of convection. Four weak tornadoes touched down as the storms passed, causing minor damage across portions of Morgan and Woodford counties. In addition, isolated cells ahead of the main line produced wind damage. In particular, widespread damage was reported across Olney in Richland County, likely due to downburst winds in excess of 70mph.

Began near Washburn (40.8940, -89.2300).

Other tornadoes from the same storm system

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

Source: NOAA Storm Events Database, event 988066. Narratives are written by the National Weather Service forecast office that issued the report.

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