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EF2 tornado in Montgomery County, Illinois

Tornado December 1, 2018 · Montgomery County, Illinois

EF2
Rating
6.8 mi
Path length
100 yd
Path width
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 EF2 means. On the Enhanced Fujita scale, EF2 is considerable damage: roofs torn off well-built houses, mobile homes destroyed, large trees snapped or uprooted, consistent with estimated gusts of 111–135 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 first touched down just southeast of Litchfield, IL, along Old Litchfield Trail where large tree branches were snapped. The damage worsened as the tornado moved northeast, where a large farm building was destroyed near Illinois Route 16. The tornado then crossed to the north of Illinois Route 16, doing damage along Rocky Hollow Trail. This area sustained the worst of the tornadic damage, where several farm buildings were destroyed. A brick family residence sustained major roof damage and suffered a partial loss of its walls in this location as well. The tornado then continued to the northeast, weakening and eventually lifting as it turned to the west towards E 7th Road. This curvature in the tornado path made the path length 7.93 miles. However, can only plot two points went entering tornado information, thus path length in the header is indicating 6.79 miles. Overall, the tornado was rated EF2 with a path length of 7.93 miles and a max path width of 100 yards. No injuries or deaths were reported with this tornado.

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 Litchfield (39.1522, -89.6324).

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 788457. Narratives are written by the National Weather Service forecast office that issued the report.

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