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Marine Thunderstorm Wind · Lake Superior

Marine Thunderstorm Wind June 4, 2019 · Duluth Mn To Pt Wing Wi, Lake Superior

45 mph

Measured gust (39 kt)

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

What the National Weather Service wrote

A gust to 45 mph was recorded by the M/V Burns Harbor.

The wider storm

Thunderstorms developed over northeastern Minnesota on the afternoon of the 4th. A warm front was draped along the International Border with a secondary warm front pushing northward from the south. Daytime heating, advection of a more favorable airmass for severe weather and a shortwave trough moved into the western part of the area and lead to increased shear and steep lapse rates that led to the development of storms. Storms become stronger through the afternoon as they moved southeast, then moved over Lake Superior, where an ore boat was able to record a gust to 45 mph.

Began near Brule Point (46.8513, -91.5900).

Source: NOAA Storm Events Database, event 835845. Narratives are written by the National Weather Service forecast office that issued the report.

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