Marine Thunderstorm Wind — Grand Portage To Grand Marais Mn, Lake Superior
2025-08-09 · near Grand Marais, Grand Portage To Grand Marais Mn, Lake Superior
34 MG
Magnitude
Event narrative
A gust of 39 mph was recorded by the MnDOT Mesonet station MN166 T.h.61 Grand Marais MP 110.8.
Wider weather episode
Another complex of thunderstorms developed the night of the 8th into the 9th across the Northern Plains and pushed eastward across the Northland during the morning hours. Storms were weakening as they reached Lake Superior, but did produce a few strong gusts in the Grand Marais area to around 40 mph as they moved through.
View location on OpenStreetMap → (47.7585, -90.3108)
Source: NOAA Storm Events Database, event_id 1290324. Narrative written by the NWS forecast office that issued the report.