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Marine Thunderstorm Wind · Lake Superior

Marine Thunderstorm Wind September 12, 2011 · Ontonagon To Upper Entrance of Portage Canal Mi, Lake Superior

74 mph

Measured gust (64 kt)

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

What the National Weather Service wrote

Wind gusts of greater than 50 mph were reported for 20 minutes by the spotter at Freda. A peak wind gust of 74 mph was measured at 1904 EST. Quarter-sized hail was also reported.

The wider storm

A powerful cold front produced strong to severe thunderstorms over Lake Superior on the evening of the 12th.

Began near Beacon Hill (47.1356, -88.8237).

Source: NOAA Storm Events Database, event 347150. Narratives are written by the National Weather Service forecast office that issued the report.

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