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EF0 Tornado — Knox, Ohio

2024-06-05 · near Brandon, Knox, Ohio

$30K

Property damage

3.3 mi

Path length

80 yds

Path width

Event narrative

An EF0 tornado with estimated peak winds of 80 mph formed near County Road 26, south of Sycamore Road in Knox County, where it damaged a large outbuilding and tree limbs. The tornado tracked east-northeastward, caused sporadic tree damage, and removed shingles and siding from residences along Garber Road before crossing Possum Street. Beyond Possum Street, the tornado continued to move east-northeastward, caused minor roof and siding damage to two residences, and an outbuilding sustained garage door damage. The same outbuilding had a portion of its roof torn-off and displaced roughly 100 yards into nearby trees to the east. As the tornado continued to move east-northeastward, it caused additional, sporadic tree damage south of Sycamore Road before the tornado ended near the intersection of Sycamore and Granville Roads in Brandon.

Wider weather episode

Knox County resided in the warm and moist sector during the early through late evening of the 5th as a cold front swept eastward from northwestern IN and the Lower Ohio Valley to far-western OH and far-southeastern IN. Ahead of the cold front, scattered thunderstorms, including supercells, developed along a surface trough axis and resided in an environment favorable for tornadic supercells. This environment was comprised of moderate MUCAPE and effective bulk shear, respectively, and favorably-low mixed layer lifting condensation levels near 750 meters AGL. An approaching mesoscale convective vortex from southwest OH backed surface winds over and near Knox County, which lead to to significant veering and strengthening of low-level winds with height and surface-based effective storm-relative helicity of about 150 meters squared per second squared. One supercell in particular tracked generally eastward and then northeastward across southern and eastern portions of Knox County. This storm produced one tornado and one instance of straight-line wind damage. Heavy rainfall rates from the storms throughout the evening produced localized flash flooding in portions of Know, Morrow, and Crawford Counties.

View location on OpenStreetMap → (40.3044, -82.5708)

Source: NOAA Storm Events Database, event_id 1198376. Narrative written by the NWS forecast office that issued the report.