Several clusters of severe thunderstorms moved across western Lake Superior from the evening of the 19th into the morning of the 20th.

Marine Thunderstorm Wind in UPPER ENTRANCE OF PORTAGE CANAL TO MANITOU ISLAND MI 5NM OFFSHORE TO US/CANADIAN BORDER, LAKE SUPERIOR
From 19-JUN-12 20:25:00 to 19-JUN-12 20:30:00 (EST-5)
Location: PASSAGE ISLAND LIGHT
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Buoy

Wind gust measured by Lake Superior buoy 45001.

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 20-JUN-12 00:20:00 to 20-JUN-12 00:25:00 (EST-5)
Location: UPPER ENTRANCE PORTAGE CANAL
Magnitude: 35.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Wind gust measured by the observing site at the upper entrance of Portage Canal.

Marine Thunderstorm Wind in UPPER ENTRANCE OF PORTAGE CANAL TO MANITOU ISLAND MI 5NM OFFSHORE TO US/CANADIAN BORDER, LAKE SUPERIOR
From 20-JUN-12 00:08:00 to 20-JUN-12 00:13:00 (EST-5)
Location: PASSAGE ISLAND LIGHT
Magnitude: 68.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Buoy

Wind gust measured by the Lake Superior buoy 45001.

Marine Thunderstorm Wind in SAXON HARBOR WI TO BLACK RIVER MI, LAKE SUPERIOR
From 20-JUN-12 03:30:00 to 20-JUN-12 03:35:00 (EST-5)
Location: SAXON HARBOR WI
Magnitude: 36.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Wind gust measured by the Saxon Harbor marine observing site.

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 20-JUN-12 03:30:00 to 20-JUN-12 03:35:00 (EST-5)
Location: SAXON HARBOR
Magnitude: 36.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Wind gust measured by the Saxon Harbor marine observing site.

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 20-JUN-12 01:54:00 to 20-JUN-12 02:00:00 (EST-5)
Location: UPPER ENTRANCE PORTAGE CANAL
Magnitude: 36.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Wind gust measured by the observing site at the upper entrance of Portage Canal.

Marine Thunderstorm Wind in UPPER ENTRANCE OF PORTAGE CANAL TO MANITOU ISLAND MI 5NM OFFSHORE TO US/CANADIAN BORDER, LAKE SUPERIOR
From 20-JUN-12 01:54:00 to 20-JUN-12 02:00:00 (EST-5)
Location: UPPER ENTRANCE PORTAGE CANAL
Magnitude: 36.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Wind gust measured by the observing site at the upper entrance of Portage Canal.

Marine Thunderstorm Wind in UPPER ENTRANCE OF PORTAGE CANAL TO EAGLE RIVER MI, LAKE SUPERIOR
From 20-JUN-12 01:54:00 to 20-JUN-12 02:00:00 (EST-5)
Location: MCCLAIN STATE PARK
Magnitude: 36.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Wind gust measured by the observing site at the upper entrance of Portage Canal.

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 19-JUN-12 20:00:00 to 19-JUN-12 20:05:00 (EST-5)
Location: ONTONAGON
Magnitude: 60.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mariner

The Cason J. Callaway measured wind gusts to 69 mph over western Lake Superior.

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 19-JUN-12 21:27:00 to 19-JUN-12 21:32:00 (EST-5)
Location: ONTONAGON
Magnitude: 41.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Buoy

The western Lake Superior buoy 45006 measured a wind gust to 47 mph.

Marine Thunderstorm Wind in UPPER ENTRANCE OF PORTAGE CANAL TO MANITOU ISLAND MI 5NM OFFSHORE TO US/CANADIAN BORDER, LAKE SUPERIOR
From 19-JUN-12 21:11:00 to 19-JUN-12 21:15:00 (EST-5)
Location: PASSAGE ISLAND LIGHT
Magnitude: 66.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Buoy

Lake Superior buoy 45001 measured wind gusts to 76 mph.

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 19-JUN-12 22:11:00 to 19-JUN-12 22:15:00 (EST-5)
Location: ROCK OF AGES LIGHT
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: C-MAN Station

Wind gust measured by the Rock of Ages C-MAN station.

Marine Thunderstorm Wind in UPPER ENTRANCE OF PORTAGE CANAL TO EAGLE RIVER MI, LAKE SUPERIOR
From 20-JUN-12 00:20:00 to 20-JUN-12 00:25:00 (EST-5)
Location: MCCLAIN STATE PARK
Magnitude: 35.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Wind gust measured by the observing site at the upper entrance of Portage Canal.