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.
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS MQT wrote it up.
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.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Marquette, MI wrote its last area forecast discussion before the first event at Sep 29, 6:44 AM EST, 6 hours 16 minutes earlier.
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</html>HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE MARQUETTE MI 525 AM EDT THU SEP 29 2011 MIZ001>006-301200- KEWEENAW-ONTONAGON-NORTHERN HOUGHTON-BARAGA-MARQUETTE-ALGER- 525 AM EDT THU SEP 29 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF WESTERN UPPER MICHIGAN AND CENTRAL UPPER MICHIGAN. .DAY ONE...TODAY AND TONIGHT NORTHERLY WIND GUSTS OF 50 TO 60 MPH ARE EXPECTED CLOSE TO LAKE SUPERIOR THIS AFTERNOON AND TONIGHT BEHIND A STRONG LOW PRESSURE SYSTEM. SEE THE LATEST WEATHER MESSAGE FOR FURTHER DETAILS. THERE IS A SLIGHT CHANCE OF THUNDERSTORMS THIS MORNING. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY NORTHERLY WIND GUSTS OF 40 TO 50 MPH ARE EXPECTED FRIDAY MORNING. .SPOTTER INFORMATION STATEMENT... SPOTTER REPORTS OF STRONG WINDS OR WIND DAMAGE WOULD BE GREATLY APPRECIATED. MIZ009>013-084-301200- GOGEBIC-IRON-DICKINSON-MENOMINEE-DELTA-SOUTHERN HOUGHTON- 525 AM EDT THU SEP 29 2011 /425 AM CDT THU SEP 29 2011/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF WESTERN UPPER MICHIGAN AND CENTRAL UPPER MICHIGAN. .DAY ONE...TODAY AND TONIGHT NORTHERLY WINDS GUSTING TO 45 MPH ARE EXPECTED THIS AFTERNOON AND TONIGHT BEHIND A STRONG LOW PRESSURE SYSTEM. SEE THE LATEST WEATHER MESSAGE FOR FURTHER DETAILS. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY NORTHERLY WINDS GUSTING TO 40 MPH ARE EXPECTED FRIDAY MORNING. .SPOTTER INFORMATION STATEMENT... SPOTTER REPORTS OF STRONG WINDS OR WIND DAMAGE WOULD BE GREATLY APPRECIATED. LMZ221-248-250-301200- GREEN BAY NORTH OF LINE FROM CEDAR RIVER MI TO ROCK ISLAND PASSAGE-SEUL CHOIX POINT TO POINT DETOUR MI- 5NM EAST OF A LINE FROM FAIRPORT MI TO ROCK ISLAND PASSAGE- 525 AM EDT THU SEP 29 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHERN LAKE MICHIGAN. .DAY ONE...TODAY AND TONIGHT NORTH STORM FORCE GUSTS TO 50 KNOTS ARE POSSIBLE TONIGHT BEHIND A STRONG LOW PRESSURE SYSTEM. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY NORTH GALE FORCE GUSTS TO 40 KNOTS ARE POSSIBLE FRIDAY. .SPOTTER INFORMATION STATEMENT... THE NEED FOR WEATHER SPOTTER REPORTS IS NOT ANTICIPATED AT THIS TIME. LSZ162-240>251-263>267-301200- LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND PORTAGE MN BEYOND 5NM-SAXON HARBOR WI TO BLACK RIVER MI- BLACK RIVER TO ONTONAGON MI- ONTONAGON TO UPPER ENTRANCE OF PORTAGE CANAL MI- UPPER ENTRANCE OF PORTAGE CANAL TO EAGLE RIVER MI- EAGLE RIVER TO MANITOU ISLAND MI- MANITOU ISLAND TO POINT ISABELLE MI- POINT ISABELLE TO LOWER ENTRANCE OF PORTAGE CANAL MI- LOWER ENTRANCE OF PORTAGE CANAL TO HURON ISLANDS MI INCLUDING KEWEENAW AND HURON BAYS-HURON ISLANDS TO MARQUETTE MI- MARQUETTE TO MUNISING MI-MUNISING TO GRAND MARAIS MI- GRAND MARAIS TO WHITEFISH POINT MI- LAKE SUPERIOR FROM SAXON HARBOR WI TO UPPER ENTRANCE TO PORTAGE CANAL MI 5NM OFF SHORE TO THE US/CANADIAN BORDER INCLUDING ISLE ROYALE NATIONAL PARK- LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER- LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI BEYOND 5NM FROM SHORE- LAKE SUPERIOR EAST OF A LINE FROM MANITOU ISLAND TO MARQUETTE MI AND WEST OF A LINE FROM GRAND MARAIS MI TO THE US/CANADIAN BORDER BEYOND 5NM FROM SHORE- LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF SHORE TO THE US/CANADIAN BORDER- 525 AM EDT THU SEP 29 2011 /425 AM CDT THU SEP 29 2011/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EASTERN LAKE SUPERIOR...CENTRAL LAKE SUPERIOR AND WESTERN LAKE SUPERIOR. .DAY ONE...TODAY AND TONIGHT NORTHERLY STORM FORCE WINDS TO 50 TO 55 KNOTS ARE EXPECTED THIS AFTERNOON AND TONIGHT ACROSS MUCH OF LAKE SUPERIOR BEHIND A STRONG LOW PRESSURE SYSTEM. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY NORTHERLY GALE FORCE WINDS TO 40 KNOTS ARE EXPECTED FRIDAY...MAINLY OVER EASTERN LAKE SUPERIOR. .SPOTTER INFORMATION STATEMENT... THE NEED FOR WEATHER SPOTTER REPORTS IS NOT ANTICIPATED AT THIS TIME. MIZ007-014-085-301200- LUCE-SOUTHERN SCHOOLCRAFT-NORTHERN SCHOOLCRAFT- 525 AM EDT THU SEP 29 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL UPPER MICHIGAN. .DAY ONE...TODAY AND TONIGHT NORTHERLY WINDS MAY GUST TO 45 MPH CLOSE TO LAKE SUPERIOR TONIGHT. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY NORTHERLY WINDS MAY GUST TO 45 MPH CLOSE TO LAKE SUPERIOR FRIDAY MORNING. .SPOTTER INFORMATION STATEMENT... THE NEED FOR WEATHER SPOTTER REPORTS IS NOT ANTICIPATED AT THIS TIME. SRF
The national radar mosaic for the moment the first event began.
12 marine high wind. Local standard time, as filed.
Measured gusts at the Rock of Ages C-Man station.
Several trees were knocked down and power was out in Copper Harbor for several hours.
Measured gust at the Grand Traverse Bay GLOS site.
Measured gust at the Stannard Rock C-MAN station.
A large white pine tree was knocked down at Skanee.
Measured wind gust at the Big Bay GLOS site.
A spotter measured a 64 mph wind gust on a hand-held anemometer at the pavilion on Presque Isle in Marquette.
A spotter measured a 64 mph wind gust on a hand-held anemometer at the pavilion on Presque Isle in Marquette.
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.
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.
Gust measured at the Grand Marais GLOS site.
Gust measured at the Grand Marais GLOS site.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Lake Superior in 2011Every state in 2011This day in weather history
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 349300, 349301, 349302, 349303, 349304, 349305, 349400, 349406, 349417, 349424, 349433, 349439.