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Marine Thunderstorm Wind · Lake Superior

Marine Thunderstorm Wind May 16, 2025 · Manitou Island To Marquette Mi Beyond 5nm From Shore, Lake Superior

49 mph

Measured gust (43 kt)

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

What the National Weather Service wrote

The U-MICH and NMU Mesonet station GISM4 Granite Island recorded wind gusts in excess of 40 mph from 4:50 PM EST to 5:30 PM EST with a peak gust of 49 mph at 5:20 PM EST associated with a line of thunderstorms.

The wider storm

A deep low pressure over the Upper Midwest sent multiple rounds of severe weather through the over the nearshore waters of the Bay of Green Bay and Lake Michigan, first by an occluded front on the 15th and then with the main low pressure and associated cold front on the 16th.

Began near Marquette (46.7204, -87.4119).

Source: NOAA Storm Events Database, event 1268183. Narratives are written by the National Weather Service forecast office that issued the report.

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