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EF1 tornado in White County, Illinois

Tornado April 19, 2011 · White County, Illinois

EF1
Rating
1.4 mi
Path length
100 yd
Path width
$300K
Damage as recorded
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 house lost the entire roof, and most windows were broken. A trailer home was blown a couple of feet off its foundation. Two to three grain bins were blown less than a hundred yards away. Utility poles were snapped. Numerous trees were snapped or uprooted. Peak winds were estimated around 110 mph. The average path width was 100 yards.

The wider storm

Thunderstorms organized into a bow echo that produced widespread very damaging winds and isolated tornadoes. A shortwave trough over the central and southern high Plains moved northeast through the Mid-Mississippi Valley into the upper Great Lakes. A surface low attendant to this system moved from west central Missouri northeast to north of St. Louis. The trailing cold front advanced southeast across the Lower Ohio Valley and served as the primary focus for thunderstorms.

Began near Epworth (38.0956, -88.1012).

Other tornadoes from the same storm system

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

Source: NOAA Storm Events Database, event 289184. Narratives are written by the National Weather Service forecast office that issued the report.

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