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EF1 tornado in Franklin County, Illinois

Tornado April 19, 2011 · Franklin County, Illinois

EF1
Rating
0.1 mi
Path length
50 yd
Path width
$10K
Damage as recorded
EF0EF1EF2EF3EF4EF5Unrated

NOAA recorded where this tornado touched down but not where it lifted, so it appears as a point. 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

Extremely large oak trees were snapped 30 feet off the ground and thrown several yards and left intertwined. Other large trees were uprooted, and a fence was damaged. Peak winds in this brief tornado were estimated near 105 mph.

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 Benton (38.0029, -88.9200).

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 290647. Narratives are written by the National Weather Service forecast office that issued the report.

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