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Marine Thunderstorm Wind · Lake Superior

Marine Thunderstorm Wind August 9, 2020 · Ontonagon To Upper Entrance of Portage Canal Mi, Lake Superior

40 mph

Measured gust (35 kt)

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

What the National Weather Service wrote

The spotter at Freda measured a peak thunderstorm wind gust of 40 mph.

The wider storm

Increasing moisture and instability ahead of cold front approaching from the Northern Plains aided the development of strong thunderstorms over portions of Lake Superior on the evening of the 9th.

Began near Beacon Hill (47.1300, -88.8200).

Source: NOAA Storm Events Database, event 915482. Narratives are written by the National Weather Service forecast office that issued the report.

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