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Marine Thunderstorm Wind · Lake Superior

Marine Thunderstorm Wind July 21, 2011 · St Marys River From Point Iroquois To E Potagannissing Bay, Lake Superior

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

The wider storm

Began near Sault Ste Marie (46.4963, -84.3932).

Source: NOAA Storm Events Database, event 337384. Narratives are written by the National Weather Service forecast office that issued the report.

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