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EF0 tornado in Beaverhead County, Montana

Tornado August 6, 2023 · Beaverhead County, Montana

EF0

Rating

1.6 mi

Path length

40 yd

Path width

EF0EF1EF2EF3EF4EF5Unrated

The path drawn at its surveyed width of 40 yards (0.02 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

Public submitted video of a landspout located northwest of Lime Reservoir, associated with a rain shower in the vicinity.

The wider storm

A closed 500 mb low over the Pacific Northwest opened up and shifted toward the Northern Rockies during this period. This wave, in combination with daytime heating, resulted in showers and thunderstorms across the region August 6th. Shear was meager, but was maximized locally to produce one tornado in Jefferson County. Additionally, a landspout was observed in southern Beaverhead County near the Idaho border.

Began near Snowline (44.6770, -112.4110).

Other tornadoes from the same storm system

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

EFU Jefferson County

Source: NOAA Storm Events Database, event 1115329. Narratives are written by the National Weather Service forecast office that issued the report.

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