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Marine Thunderstorm Wind · Lake Superior

Marine Thunderstorm Wind June 21, 2025 · Outer Apostle Islands Beyond 5 Nm From Mainland, Lake Superior

51 mph

Measured gust (44 kt)

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

What the National Weather Service wrote

The DISW3 Devils Island C-MAN station reported a gust of 51 mph.

The wider storm

A complex of thunderstorms moved across the Northland the night of the 20th into the 21st. A warm front was draped across the region and led to a first round of storms moving to the northeast. This was quickly followed by an eastward moving line of storms. Damaging winds were the primary threat with these storms as they moved across western Lake Superior. Wind gusts of 50 to 60 mph were reported along the South Shore of Lake Superior with a high gust of 61 mph reported at the Port Wing harbor.

Began near Devils Island Lighthouse (47.0800, -90.7300).

Source: NOAA Storm Events Database, event 1278917. Narratives are written by the National Weather Service forecast office that issued the report.

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