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EF0 tornado in Ontonagon County, Michigan

Tornado August 19, 2011 · Ontonagon County, Michigan

EF0
Rating
1.5 mi
Path length
125 yd
Path width
$20K
Damage as recorded
EF0EF1EF2EF3EF4EF5Unrated

The path drawn at its surveyed width of 125 yards (0.07 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

A strong EF0 tornado with winds estimated around 85 mph touched down at the River Pines RV Park and Campground and then skipped northeastward across the village lifting on the east side of the Ontonagon Golf Course. Most of the damage was confined to snapped and uprooted trees, snapped power poles, a small flipped boat, minor roof damage, and some structural damage to a garage. There were no injuries.

The wider storm

A deep low pressure system moving through northwest Ontario pushed a warm front across western Upper Michigan in the morning hours...followed by a cold frontal passage in the afternoon. The frontal boundaries produced several severe thunderstorms and two weak tornadoes over western Upper Michigan on the 19th.

Began near Ontonagon (46.8650, -89.3182).

Other tornadoes from the same storm system

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

EF1 Marinette County 1 dead

Source: NOAA Storm Events Database, event 342019. Narratives are written by the National Weather Service forecast office that issued the report.

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