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EF1 tornado in Beltrami County, Minnesota

Tornado July 11, 2018 · Beltrami County, Minnesota

EF1

Rating

2.0 mi

Path length

400 yd

Path width

$20K

Damage as recorded

EF0EF1EF2EF3EF4EF5Unrated

The path drawn at its surveyed width of 400 yards (0.23 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

This tornado touched down and tracked along and across the Bureau of Indian Affairs (BIA) 25 road for about two miles, to near the south shore of the Lower Red Lake. Trees were torn up quite violently and debris was spread across nearly a mile of BIA25. Peak winds were estimated at 100 mph.

The wider storm

A cold front moved into the northwest quarter of Minnesota during the evening of the 11th into the early morning hours of the 12th. Ahead of this cold front, temperatures over the northwest quarter of Minnesota during the early evening of the 11th ranged well into the 80s, with dew points in the middle 70s, so it was very warm and muggy. Thunderstorms broke out along the front, producing funnel clouds, tornadoes, large hail, and damaging wind gusts.

Began near Ponemah (48.0500, -94.8500).

Other tornadoes from the same storm system

2 more tornadoes the National Weather Service filed under this storm episode.

EF1 Beltrami County EF0 Beltrami County

Source: NOAA Storm Events Database, event 758356. Narratives are written by the National Weather Service forecast office that issued the report.

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