An upper disturbance moving along and north of a warm front caused severe thunderstorms over portions of Lake Superior from the evening of the 2nd into the early morning of the 3rd.

Marine Thunderstorm Wind in HURON ISLANDS TO MARQUETTE MI, LAKE SUPERIOR
From 03-JUL-12 01:20:00 to 03-JUL-12 01:50:00 (EST-5)
Location: GRANITE ISLAND LIGHT
Magnitude: 61.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Measured wind gust at the Granite Island Lighthouse.

Marine Thunderstorm Wind in MANITOU ISLAND TO MARQUETTE MI BEYOND 5NM FROM SHORE, LAKE SUPERIOR
From 03-JUL-12 01:20:00 to 03-JUL-12 01:50:00 (EST-5)
Location: MARQUETTE
Magnitude: 61.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Measured wind gust at the Granite Island Lighthouse.

Marine Thunderstorm Wind in EAGLE RIVER TO MANITOU ISLAND MI, LAKE SUPERIOR
From 03-JUL-12 00:45:00 to 03-JUL-12 00:48:00 (EST-5)
Location: COPPER HARBOR
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Dispatch reported trees down blocking a road in Copper Harbor.

Marine Thunderstorm Wind in HURON ISLANDS TO MARQUETTE MI, LAKE SUPERIOR
From 03-JUL-12 00:55:00 to 03-JUL-12 00:58:00 (EST-5)
Location: BIG BAY POINT LIGHT
Magnitude: 55.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Measured wind gust at Big Bay observing site.

Marine Thunderstorm Wind in MANITOU ISLAND TO MARQUETTE MI AND W OF GRAND MARAIS MI TO US/CANADIAN BORDER BEYOND 5NM OF SHORE, LAKE SUPERIOR
From 03-JUL-12 00:50:00 to 03-JUL-12 00:53:00 (EST-5)
Location: STANNARD ROCK LIGHT
Magnitude: 36.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Buoy

Measured wind gust at buoy 45004.

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 02-JUL-12 22:50:00 to 02-JUL-12 22:53:00 (EST-5)
Location: SAXON HARBOR
Magnitude: 35.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Measured wind gust at the Saxon Harbor observing site.

Marine Thunderstorm Wind in SAXON HARBOR WI TO BLACK RIVER MI, LAKE SUPERIOR
From 02-JUL-12 22:50:00 to 02-JUL-12 22:53:00 (EST-5)
Location: SAXON HARBOR WI
Magnitude: 35.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Measured wind gust at the Saxon Harbor observing site.

Marine Thunderstorm Wind in ONTONAGON TO UPPER ENTRANCE OF PORTAGE CANAL MI, LAKE SUPERIOR
From 02-JUL-12 23:40:00 to 02-JUL-12 23:43:00 (EST-5)
Location: KEWEENAW UPR ENT LT
Magnitude: 35.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Measured wind gust at the Portage Canal observing site.

Marine Thunderstorm Wind in UPPER ENTRANCE OF PORTAGE CANAL TO EAGLE RIVER MI, LAKE SUPERIOR
From 02-JUL-12 23:40:00 to 02-JUL-12 23:43:00 (EST-5)
Location: MCCLAIN STATE PARK
Magnitude: 35.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Measured wind gust at the Portage Canal 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 02-JUL-12 23:40:00 to 02-JUL-12 23:43:00 (EST-5)
Location: UPPER ENTRANCE PORTAGE CANAL
Magnitude: 35.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Measured wind gust at the Portage Canal observing site.

Marine Thunderstorm Wind in PORTAGE LAKE TO HURON IS MI TO LOWER ENTRANCE OF PORTAGE CANAL TO HURON IS INC KEWEENAW AND HURON BAYS, LAKE SUPERIOR
From 03-JUL-12 00:20:00 to 03-JUL-12 00:25:00 (EST-5)
Location: ROCK BEACH POINT
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several trees downed northeast of L'anse.

Marine Thunderstorm Wind in HURON ISLANDS TO MARQUETTE MI, LAKE SUPERIOR
From 03-JUL-12 00:20:00 to 03-JUL-12 00:25:00 (EST-5)
Location: HURON ISLAND LIGHT
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several trees downed northeast of L'anse.

Marine Thunderstorm Wind in MANITOU ISLAND TO MARQUETTE MI BEYOND 5NM FROM SHORE, LAKE SUPERIOR
From 03-JUL-12 00:20:00 to 03-JUL-12 00:25:00 (EST-5)
Location: HURON ISLAND LIGHT
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several trees downed northeast of L'anse.

Marine Thunderstorm Wind in MANITOU ISLAND TO MARQUETTE MI AND W OF GRAND MARAIS MI TO US/CANADIAN BORDER BEYOND 5NM OF SHORE, LAKE SUPERIOR
From 03-JUL-12 01:20:00 to 03-JUL-12 01:50:00 (EST-5)
Location: MARQUETTE
Magnitude: 61.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Measured wind gust at the Granite Island Lighthouse.