Marine Thunderstorm Wind — Grand Marais To Taconite Hbr Mn, Lake Superior

2023-10-05 · near Bay of Grand Marais Asos, Grand Marais To Taconite Hbr Mn, Lake Superior

Event narrative

A measured gust of 54 mph was recorded by the KGNA ASOS station at the Bay of Grand Marais.

Wider weather episode

Thunderstorms developed ahead of a cold front during the late morning and early afternoon hours of the 5th across northeastern Minnesota. While the storms were rather benign over land with reports of pea-sized hail, stronger wind gusts were reported over the waters of western Lake Superior. Gusts closer to shore were in the 40 to 55 mph range with gusts to 66 mph reported by two Great Lakes bulk carriers over the open waters of western Lake Superior.

View location on OpenStreetMap → (47.7454, -90.3457)

Source: NOAA Storm Events Database, event_id 1143430. Narrative written by the NWS forecast office that issued the report.