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Marine Thunderstorm Wind · Lake Superior

Marine Thunderstorm Wind September 4, 2012 · Upper Entrance of Portage Canal To Eagle River Mi, Lake Superior

45 mph

Measured gust (39 kt)

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

What the National Weather Service wrote

Measured wind gust at the Portage Canal GLOS.

The wider storm

Afternoon heating of an unstable air mass produced strong to severe thunderstorms over portions of Lake Superior from the evening of the 4th through the morning of the 5th.

Began near Mcclain State Park (47.2769, -88.5278).

Source: NOAA Storm Events Database, event 409904. Narratives are written by the National Weather Service forecast office that issued the report.

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