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Marine Thunderstorm Wind · Lake Superior

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

46 mph

Measured gust (40 kt)

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

What the National Weather Service wrote

Wind gust of 46 mph measured at Freda.

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 Beacon Hill (47.1300, -88.8200).

Source: NOAA Storm Events Database, event 409899. Narratives are written by the National Weather Service forecast office that issued the report.

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