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EF0 tornado in Montgomery County, Illinois

Tornado December 1, 2018 · Montgomery County, Illinois

EF0
Rating
3.1 mi
Whole path
25 yd
Path width
$140K
Damage as recorded

NOAA records this tornado county by county. Its path ran through Montgomery County → Christian County; the totals above are for the whole tornado.

EF0EF1EF2EF3EF4EF5Unrated

The path drawn at its surveyed width of 25 yards (0.01 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

The tornado touched down just south of the Christian/Montgomery County line, near the intersection of E000 North Rd and N400 East Rd. It damaged an outbuilding by knocking out a wall and pushed it off it's foundation, before entering Christian County (WFO ILX County Warning Area). This segment of the tornado (Montgomery County IL) was rated EF0 with a path length of 0.06 miles and a max path width of 25 yards. No injuries or deaths were reported in Montgomery County. The entire tornado was rated EF0. It's path length was 3.1 miles with a max path width of 200 yards. No injuries or deaths were reported.

The wider storm

By late morning much of the rain shifted north and east of forecast area allowing partial

clearing to destabilize the atmosphere. Steep lapse rates due to relatively cold mid level temperatures southeast of the upper level low combined with strong low-mid level wind shear due to an 80-kt mid level wind max southeast of the upper level low. This led to the development of isolated low topped supercells along the northward moving warm front and ahead of the eastward moving cold front. Eight tornadoes were surveyed over WFO LSX's forecast area.

Began near Harvel (39.3480, -89.4577).

Other tornadoes from the same storm system

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

Source: NOAA Storm Events Database, event 788459. Narratives are written by the National Weather Service forecast office that issued the report.

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