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EF1 tornado in Adams County, Illinois

Tornado August 5, 2023 · Adams County, Illinois

EF1

Rating

2.9 mi

Path length

200 yd

Path width

EF0EF1EF2EF3EF4EF5Unrated

The path drawn at its surveyed width of 200 yards (0.11 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

The tornado developed about three quarters of a mile south southwest of Marcelline, IL around 2:24 AM on August 5th, 2023. It tracked to the east-northeast, crossing Illinois Route 96 just north of 2400th Avenue, snapping tree limbs and displacing power poles. Further northeast, it then crossed N 2450th Avenue where it caused damage to a few homes and trees in the area. After crossing E 900th Street north of the intersection with N 2450th Avenue, it crossed E 953rd Lane and caused additional damage to a home, an outbuilding, and trees. The tornado lifted after this damage, around 2:31 AM. Overall, the tornado was rated EF1 with a path length of 2.87 miles. The max path width was 200 yards. No deaths or injuries were reported.

The wider storm

An MCV moved through northern sections of Missouri during the evening of August 4th into the early morning hours of August 5th. Widespread showers and storms developed. Some of the storms became severe. There were some damaging winds reported as well as two tornadoes. One tornado moved through Baring, MO with most of the town sustaining some kind of damage. Also, two people sustained minor injuries. Another tornado developed in Adams County in Illinois near Marcelline.

Began near Marcelline (40.1099, -91.3759).

Source: NOAA Storm Events Database, event 1146025. Narratives are written by the National Weather Service forecast office that issued the report.

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