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NDBC is adding additional data to its .drift file format on or about August 17. For more info, see the Drift File Format Change Notice.

National Weather Service Marine Forecast FZUS63 KMQT

FZUS63 KMQT 111411
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1011 AM EDT Thu Aug 11 2022

For waters beyond 5 nautical miles of shore on Lake Superior.

Waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. Occasional wave height is the
average of the highest 1/10 of the wave spectrum.

SYNOPSIS
30.2 inch ridging is dominating across the Upper Great
Lakes region this morning, persisting well into tomorrow. Late
Friday, the ridging will weaken slightly to 30.1 inches, with an
additional pressure fall as it gets deeper into the weekend,
settling out to around 30.0 inches into early next week. The
pressure then rebuilds early next week to around 30.2 inches as a
30.3 inch ridge centers itself near James Bay.

LSZ162-112215-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1011 AM EDT Thu Aug 11 2022 /911 AM CDT Thu Aug 11 2022/

REST OF TODAY
Northeast winds 5 to 15 knots veering southeast
late. Waves calm to 2 feet.

TONIGHT
Northeast winds 5 to 15 knots veering east late. Waves
calm to 2 feet.

FRIDAY
East winds 5 to 15 knots backing northeast late. A
slight chance of showers by mid afternoon. Waves calm to 2 feet.

FRIDAY NIGHT
Southeast winds 5 to 15 knots backing east after
midnight. A chance of showers and a slight chance of
thunderstorms. Waves calm to 2 feet.

SATURDAY
Northeast winds 5 to 15 knots. A slight chance of
showers. Waves calm to 2 feet.

SATURDAY NIGHT
Northeast winds 5 to 15 knots. Waves calm to
2 feet.

SUNDAY
Northeast winds 5 to 15 knots. Waves calm to 2 feet.

MONDAY
Northeast winds 5 to 15 knots. Waves calm to 2 feet.



LSZ263-112215-
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-
1011 AM EDT Thu Aug 11 2022

REST OF TODAY
North winds 5 to 15 knots veering northeast in
the afternoon, then veering southwest late. Waves calm to 2 feet.

TONIGHT
West winds 5 to 15 knots backing south late. Waves
calm to 2 feet.

FRIDAY
South winds 5 to 15 knots backing east late. Waves calm
to 2 feet.

FRIDAY NIGHT
South winds 5 to 15 knots. A slight chance of
thunderstorms through midnight. A chance of showers. Waves calm
to 2 feet.

SATURDAY
East winds 5 to 15 knots backing northeast by mid
afternoon. A slight chance of showers. Waves calm to 2 feet.

SATURDAY NIGHT
Northeast winds 5 to 15 knots. Waves calm to
2 feet.

SUNDAY
Northeast winds 5 to 15 knots. Waves calm to 2 feet.

MONDAY
Northeast winds 5 to 15 knots veering east. Waves calm
to 2 feet.



LSZ264-112215-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1011 AM EDT Thu Aug 11 2022

REST OF TODAY
Northwest winds 5 to 15 knots backing west in
the afternoon. Waves calm to 2 feet.

TONIGHT
West winds 5 to 15 knots becoming southwest less than
10 knots late. Waves calm to 2 feet.

FRIDAY
South winds less than 10 knots increasing to 5 to
15 knots in the afternoon, then backing southeast late. Waves
calm to 2 feet.

FRIDAY NIGHT
South winds 5 to 15 knots diminishing to less
than 10 knots after midnight. A chance of showers. Waves calm to
2 feet.

SATURDAY
Southeast winds 5 to 15 knots backing east by mid
afternoon. A chance of showers through early afternoon. Waves
calm to 2 feet.

SATURDAY NIGHT
East winds 5 to 15 knots becoming northeast
less than 10 knots after midnight. Waves calm to 2 feet.

SUNDAY
Northeast winds less than 10 knots. Waves calm to
2 feet.

MONDAY
Northeast winds 5 to 15 knots veering east. Waves calm
to 2 feet.



LSZ265-112215-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1011 AM EDT Thu Aug 11 2022

REST OF TODAY
Northwest winds 5 to 15 knots veering north in
the afternoon. Waves calm to 2 feet.

TONIGHT
West winds 5 to 15 knots backing southwest late. Waves
calm to 2 feet.

FRIDAY
South winds 5 to 15 knots backing southeast in the
afternoon, then becoming east 10 to 20 knots late. Waves calm to
2 feet.

FRIDAY NIGHT
Southeast winds 5 to 15 knots veering south after
midnight. A chance of showers. Waves calm to 2 feet.

SATURDAY
South winds 10 to 20 knots backing southeast by mid
afternoon. A chance of showers. Waves calm to 2 feet.

SATURDAY NIGHT
East winds 5 to 15 knots backing northeast
after midnight. Waves calm to 2 feet.

SUNDAY
Northeast winds 5 to 15 knots. Waves calm to 2 feet.

MONDAY
Northeast winds 5 to 15 knots. Waves calm to 2 feet.



LSZ266-112215-
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-
1011 AM EDT Thu Aug 11 2022

REST OF TODAY
Northwest winds 10 to 20 knots diminishing to
5 to 15 knots late. Waves calm to 2 feet.

TONIGHT
Northwest winds 5 to 15 knots backing west late. Waves
calm to 2 feet.

FRIDAY
South winds 5 to 15 knots backing southeast late. Waves
calm to 2 feet.

FRIDAY NIGHT
Southeast winds 10 to 20 knots veering south
after midnight. A chance of showers. Waves calm to 2 feet.

SATURDAY
South winds 10 to 20 knots backing southeast by mid
afternoon. A chance of showers. Waves calm to 2 feet.

SATURDAY NIGHT
Southeast winds 5 to 15 knots backing east
after midnight. Waves calm to 2 feet.

SUNDAY
North winds 5 to 15 knots. Waves calm to 2 feet.

MONDAY
North winds 5 to 15 knots. Waves calm to 2 feet.



LSZ267-112215-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1011 AM EDT Thu Aug 11 2022

REST OF TODAY
Northwest winds 10 to 20 knots increasing to
15 to 25 knots late. Waves calm to 2 feet building to 1 to
3 feet.

TONIGHT
Northwest winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves subsiding to calm to 2 feet.

FRIDAY
West winds 5 to 15 knots veering northwest in the
afternoon, then veering east late. Waves calm to 2 feet.

FRIDAY NIGHT
South winds 5 to 15 knots. A slight chance of
showers after midnight. Waves calm to 2 feet.

SATURDAY
South winds 10 to 20 knots backing southeast by mid
afternoon. A chance of showers. Waves calm to 2 feet.

SATURDAY NIGHT
Southeast winds 10 to 20 knots becoming east
5 to 15 knots after midnight. Waves calm to 2 feet.

SUNDAY
North winds 5 to 15 knots. Waves calm to 2 feet.

MONDAY
North winds 5 to 15 knots increasing to 10 to 20 knots.
Waves calm to 2 feet.



LSZ261-112215-
MAFOR 1115/
Superior West 11100 11300 12400 11100 12200 11300. Waves 1 foot
or less.

Superior North Central 11700 11600 13610 11600 11500 11400. Waves
2 feet or less.

Superior South Central 11710 12700 13600 12400. Waves 1 foot or
less.

Superior East 14710 11710 12700 11600. Waves 1 to 3 feet.



lg

Experimental modernized open lake forecast is available online at
weather.gov/mqt/glftable

Graphical marine forecasts are available online at:
weather.gov/greatlakes