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EF1 tornado in Clinton County, Illinois

Tornado November 17, 2013 · Clinton County, Illinois

EF1

Rating

0.4 mi

Path length

50 yd

Path width

EF0EF1EF2EF3EF4EF5Unrated

The path drawn at its surveyed width of 50 yards (0.03 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 on Jamestown Road about seven tenths of a mile south of the intersection with Low Bridge Road and moved east northeast about four tenths of a mile before dissipating. It destroyed a garage, removed shingles from a house, destroyed a pole barn and snapped a number of large trees. This tornado was photographed by numerous people. Overall, the entire tornado path length was 0.37 miles with a max path width of 50 yards. The tornado was rated EF1 with max wind speed of 100 MPH.

The wider storm

Strong cold front moved through the region with plenty of lift, moisture and instability. Numerous severe storms developed and raced east across forecast area. There were numerous reports of large hail, damaging winds and tornadoes. Also, because of a tight gradient with this system non-thunderstorm winds gusted in excess of 40 mph in a number of locations.

Began near Jamestown (38.7099, -89.5175).

Other tornadoes from the same storm system

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

EF4 Washington County 2 dead EF2 Fayette County EF0 Macoupin County

Source: NOAA Storm Events Database, event 482458. Narratives are written by the National Weather Service forecast office that issued the report.

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