A rapidly deepening low pressure system moving through the Upper Great Lakes resulted in north storm force wind gusts across much of Lake Superior on the evening of the 29th.

Marine High Wind in MANITOU ISLAND TO MARQUETTE MI AND W OF GRAND MARAIS MI TO US/CANADIAN BORDER BEYOND 5NM OF SHORE, LAKE SUPERIOR
From 29-SEP-11 17:00:00 to 29-SEP-11 19:00:00 (EST-5)
Location: STANNARD ROCK LIGHT
Magnitude: 60.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: C-MAN Station

Measured gust at the Stannard Rock C-MAN station.

Marine High 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 29-SEP-11 17:00:00 to 29-SEP-11 17:15:00 (EST-5)
Location: POINT ABBAYE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

A large white pine tree was knocked down at Skanee.

Marine High Wind in HURON ISLANDS TO MARQUETTE MI, LAKE SUPERIOR
From 29-SEP-11 18:20:00 to 29-SEP-11 18:25:00 (EST-5)
Location: BIG BAY POINT LIGHT
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Measured wind gust at the Big Bay GLOS site.

Marine High Wind in HURON ISLANDS TO MARQUETTE MI, LAKE SUPERIOR
From 29-SEP-11 19:00:00 to 29-SEP-11 19:05:00 (EST-5)
Location: MARQUETTE LIGHTHOUSE
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A spotter measured a 64 mph wind gust on a hand-held anemometer at the pavilion on Presque Isle in Marquette.

Marine High Wind in MARQUETTE TO MUNISING MI, LAKE SUPERIOR
From 29-SEP-11 19:00:00 to 29-SEP-11 19:05:00 (EST-5)
Location: MARQUETTE LIGHTHOUSE
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A spotter measured a 64 mph wind gust on a hand-held anemometer at the pavilion on Presque Isle in Marquette.

Marine High Wind in MARQUETTE TO MUNISING MI, LAKE SUPERIOR
From 29-SEP-11 20:00:00 to 29-SEP-11 23:00:00 (EST-5)
Location: MUNISING
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

The Alger County Sheriff reported trees down across roads and power lines throughout several portions of the Alger County.  Several of the trees were 12 inches in diameter.

Marine High Wind in MUNISING TO GRAND MARAIS MI, LAKE SUPERIOR
From 29-SEP-11 20:00:00 to 29-SEP-11 23:00:00 (EST-5)
Location: GRAND ISLAND HARBOR LIGHT
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

The Alger County Sheriff reported trees down across roads and power lines throughout several portions of the Alger County.  Several of the trees were 12 inches in diameter.

Marine High Wind in MUNISING TO GRAND MARAIS MI, LAKE SUPERIOR
From 29-SEP-11 20:50:00 to 29-SEP-11 20:55:00 (EST-5)
Location: GRAND MARAIS LIGHT
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Gust measured at the Grand Marais GLOS site.

Marine High Wind in GRAND MARAIS TO WHITEFISH POINT MI, LAKE SUPERIOR
From 29-SEP-11 20:50:00 to 29-SEP-11 20:55:00 (EST-5)
Location: GRAND MARAIS LIGHT
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Gust measured at the Grand Marais GLOS site.

Marine High 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 29-SEP-11 13:00:00 to 29-SEP-11 14:00:00 (EST-5)
Location: ROCK OF AGES LIGHT
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: C-MAN Station

Measured gusts at the Rock of Ages C-Man station.

Marine High Wind in EAGLE RIVER TO MANITOU ISLAND MI, LAKE SUPERIOR
From 29-SEP-11 16:00:00 to 29-SEP-11 20:00:00 (EST-5)
Location: COPPER HARBOR
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Several trees were knocked down and power was out in Copper Harbor for several hours.

Marine High Wind in POINT ISABELLE TO LOWER ENTRANCE OF PORTAGE CANAL MI, LAKE SUPERIOR
From 29-SEP-11 16:40:00 to 29-SEP-11 16:45:00 (EST-5)
Location: TRAVERSE BAY
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Measured gust at the Grand Traverse Bay GLOS site.