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Marine Thunderstorm Wind · Lake Superior

Marine Thunderstorm Wind July 1, 2011 · Eagle River To Manitou Island Mi, Lake Superior

69 mph

Estimated gust (60 kt)

Where the report was made, with tornadoes recorded within 15 miles over the years.

What the National Weather Service wrote

The Keweenaw County Sheriff reported around 40 trees uprooted or snapped off just west of Copper Harbor. The trees ranged in diameter from 6 to 18 inches.

The wider storm

A cold front moving through a warm and unstable airmass produced a line of strong to severe thunderstorms across much of Lake Superior from late evening on the 1st into the early morning of the 2nd.

Began near Copper Harbor (47.4721, -87.8984).

Source: NOAA Storm Events Database, event 329622. Narratives are written by the National Weather Service forecast office that issued the report.

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