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EF0 tornado in Marion County, West Virginia

Tornado June 14, 2021 · Marion County, West Virginia

EF0

Rating

0.9 mi

Path length

100 yd

Path width

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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 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

Initial damage began just west of Interstate 79, and intensified

briefly after crossing the Interstate. The most concentrated

damage along the convergent debris path was found along Stoney

Road, where numerous trees were uprooted or snapped, and a well-

constructed garage lost shingles. A large tree in this area was

blown onto a house, where an inhabiatant sustained injuries. The

tornado continued along the valley and slowly weakened, continuing

to uproot trees.

Given the wet soil from prior rain, maximum wind speed was

estimated on the lower end of what would be consistent with the

nature and scope of the observed damage.

The wider storm

Severe storms developed along an approaching front on Monday, June 14th. Strong shear (60kts in the 0-6km layer), moderate instability (CAPE of 1000-1500 J/kg), and dry mid-level air helped produce strong downdrafts and hail.

An isolated supercell developed ahead of an advancing boundary and quickly spun up a tornado near Pleasant Valley, WV.

Began near Colfax (39.4730, -80.1220).

Source: NOAA Storm Events Database, event 966484. Narratives are written by the National Weather Service forecast office that issued the report.

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