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EF1 tornado in Marion County, Ohio

Tornado August 12, 2023 · Marion County, Ohio

EF1
Rating
0.1 mi
Path length
75 yd
Path width
$23K
Damage as recorded
EF0EF1EF2EF3EF4EF5Unrated

The path drawn at its surveyed width of 75 yards (0.04 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 brief EF1 tornado with estimated peak winds of 90 mph occurred just south of the intersection of OH-309 and Dry Lane Road North in the La Rue area. As the tornado moved east-northeastward, it caused damage at a residential property along Dry Lane Road North. A portion of an outbuilding's roof was torn-off and several trees were damaged.

The wider storm

An occluded surface low meandered near the eastern shore of Lake Superior during the late morning through early evening of the 12th. Simultaneously, the trailing cold front swept southeastward from southeastern Lower MI and northern IN to central Lake Erie and north-central/west-central portions of OH. Multiple multicell and supercell thunderstorms occurred along and ahead of the cold front in northern OH. These storms produced severe hail, damaging convective gusts, and two tornadoes in a warm sector comprised of moderate to strong MUCAPE and effective bulk shear, respectively, mixed-layer lifting condensation levels near 750 to 1500 meters AGL, and strong surface-based effective storm-relative helicity near 150 meters squared per second squared.

Began near Decliff (40.6415, -83.3633).

Other tornadoes from the same storm system

1 more tornado the National Weather Service filed under this storm episode.

Source: NOAA Storm Events Database, event 1146364. Narratives are written by the National Weather Service forecast office that issued the report.

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