Upper disturbances moving through the moist and unstable air mass produced strong to severe thunderstorms over portions of Lake Superior from the evening of the 5th into the morning of the 6th.

Marine Thunderstorm Wind in SAXON HARBOR WI TO UPPER ENTRANCE OF PORTAGE CANAL MI 5NM OFFSHORE TO US/CANADIAN BORDER INC ISLE ROYAL NP, LAKE SUPERIOR
From 05-SEP-23 20:39:00 to 05-SEP-23 20:49:00 (EST-5)
Location: PASSAGE ISLAND LIGHT
Magnitude: 61.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: C-MAN Station

Peak thunderstorm wind gust measured at the Passage Island Light C-MAN station just northeast of Isle Royale.

Marine Thunderstorm Wind in UPPER ENTRANCE OF PORTAGE CANAL TO MANITOU ISLAND MI 5NM OFFSHORE TO US/CANADIAN BORDER, LAKE SUPERIOR
From 05-SEP-23 20:39:00 to 05-SEP-23 20:49:00 (EST-5)
Location: PASSAGE ISLAND LIGHT
Magnitude: 61.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: C-MAN Station

Peak thunderstorm wind gust measured at the Passage Island Light C-MAN station just northeast of Isle Royale.

Marine Thunderstorm Wind in SAXON HARBOR WI TO UPPER ENTRANCE OF PORTAGE CANAL MI 5NM OFFSHORE TO US/CANADIAN BORDER INC ISLE ROYAL NP, LAKE SUPERIOR
From 05-SEP-23 19:00:00 to 05-SEP-23 19:10:00 (EST-5)
Location: ONTONAGON
Magnitude: 39.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Buoy

Peak thunderstorm wind gust at the western Lake Superior buoy (45006).

Marine Thunderstorm Wind in SAXON HARBOR WI TO UPPER ENTRANCE OF PORTAGE CANAL MI 5NM OFFSHORE TO US/CANADIAN BORDER INC ISLE ROYAL NP, LAKE SUPERIOR
From 05-SEP-23 19:18:00 to 05-SEP-23 19:28:00 (EST-5)
Location: ROCK OF AGES LIGHT
Magnitude: 47.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: C-MAN Station

Peak thunderstorm wind gust at Rock of Ages Light C-MAN station.

Marine Thunderstorm Wind in SAXON HARBOR WI TO UPPER ENTRANCE OF PORTAGE CANAL MI 5NM OFFSHORE TO US/CANADIAN BORDER INC ISLE ROYAL NP, LAKE SUPERIOR
From 05-SEP-23 20:24:00 to 05-SEP-23 20:34:00 (EST-5)
Location: PASSAGE ISLAND LIGHT
Magnitude: 40.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

A peak thunderstorm wind gust measured by the Ojibway RAWS station on Isle Royale.

Marine Thunderstorm Wind in UPPER ENTRANCE OF PORTAGE CANAL TO MANITOU ISLAND MI 5NM OFFSHORE TO US/CANADIAN BORDER, LAKE SUPERIOR
From 05-SEP-23 20:24:00 to 05-SEP-23 20:34:00 (EST-5)
Location: PASSAGE ISLAND LIGHT
Magnitude: 40.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

A peak thunderstorm wind gust measured by the Ojibway RAWS station on Isle Royale.

Marine Thunderstorm Wind in ONTONAGON TO UPPER ENTRANCE OF PORTAGE CANAL MI, LAKE SUPERIOR
From 05-SEP-23 20:30:00 to 05-SEP-23 20:40:00 (EST-5)
Location: KEWEENAW UPR ENT LT
Magnitude: 37.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Buoy

Peak thunderstorm wind gust measured by the Upper (North) Entrance Portage Canal buoy (45023).

Marine Thunderstorm Wind in UPPER ENTRANCE OF PORTAGE CANAL TO EAGLE RIVER MI, LAKE SUPERIOR
From 05-SEP-23 20:30:00 to 05-SEP-23 20:40:00 (EST-5)
Location: KEWEENAW UPPER ENTRY LIGHT
Magnitude: 37.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Buoy

Peak thunderstorm wind gust measured by the Upper (North) Entrance Portage Canal buoy (45023).