538
FZUS63 KMQT 161357
GLFLS
OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
957 AM EDT WED SEP 16 2026
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
THIS MORNING, 30.3 INCH HIGH PRESSURE WEST OF LAKE SUPERIOR BUILDS
TO 30.4 INCHES AS IT MOVES OVER THE LAKE. THE HIGH WEAKENS TO 30.3
INCHES OVER QUEBEC EARLY THURSDAY MORNING AS 29.9 INCH LOW PRESSURE
MOVES SLONG THE WESTERN HUDSON BAY SHORELINE. MEANWHILE, 30.4 INCH
HIGH PRESSURE DEVELOPS OVER NORTH DAKOTA AND MANITOBA. THIS HIGH
MOVES OVER NORTHERN ONTARIO AND LAKE SUPERIOR BY FRIDAY MORNING AS
THE LOW PUSHES INTO QUEBEC AND ANOTHER 29.9 INCH LOW DEVELOPS OVER
SOUTH DAKOTA AND NEBRASKA. THE HIGH WEAKENS TO 30.3 INCHES AS IT
MOVES TO THE QUEBEC/ONTARIO LINE SATURDAY MORNING AS THE LOW SHIFTS
TO THE UPPER MISSISSIPPI VALLEY. BY SUNDAY MORNING, ANOTHER 30.3
INCH HIGH WILL MOVE OVER NORTHWESTERN ONTARIO. THE HIGH SHIFTS TO
NORTHEASTERN ONTARIO MONDAY MORNING.
LSZ162-162000-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
957 AM EDT WED SEP 16 2026 /857 AM CDT WED SEP 16 2026/
REST OF TODAY
NORTHEAST WINDS 5 TO 15 KNOTS VEERING EAST IN
THE AFTERNOON. A SLIGHT CHANCE OF SHOWERS BY MID AFTERNOON. WAVES
CALM TO 2 FEET.
TONIGHT
NORTHEAST WINDS 5 TO 15 KNOTS BACKING NORTHWEST LATE.
A SLIGHT CHANCE OF SHOWERS. WAVES CALM TO 2 FEET.
THURSDAY
WEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
THURSDAY NIGHT
NORTH WINDS 5 TO 15 KNOTS BECOMING NORTHEAST
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
FRIDAY
EAST WINDS 15 TO 25 KNOTS. A CHANCE OF SHOWERS. WAVES
BUILDING TO 1 TO 3 FEET.
FRIDAY NIGHT
EAST WINDS 15 TO 25 KNOTS. WAVES BUILDING TO 2 TO
4 FEET.
SATURDAY
NORTHEAST WINDS 20 TO 30 KNOTS DIMINISHING TO 10 TO
20 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET.
SUNDAY
NORTHEAST GALES TO 35 KNOTS BECOMING EAST 20 TO
30 KNOTS. WAVES BUILDING TO 2 TO 4 FEET, THEN SUBSIDING TO 1 TO
3 FEET.
LSZ263-162000-
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-
957 AM EDT WED SEP 16 2026
REST OF TODAY
NORTH WINDS LESS THAN 10 KNOTS VEERING NORTHEAST
IN THE AFTERNOON, THEN BECOMING EAST 5 TO 15 KNOTS LATE. WAVES
CALM TO 2 FEET.
TONIGHT
EAST WINDS 5 TO 15 KNOTS VEERING SOUTHEAST AFTER
MIDNIGHT, THEN VEERING SOUTHWEST LATE. A SLIGHT CHANCE OF
SHOWERS. WAVES CALM TO 2 FEET.
THURSDAY
WEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
THURSDAY NIGHT
NORTH WINDS 5 TO 15 KNOTS BECOMING NORTHEAST
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 1 TO 3 FEET.
FRIDAY
EAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO 20 KNOTS
BY MID AFTERNOON. A SLIGHT CHANCE OF SHOWERS BY MID AFTERNOON.
WAVES 1 TO 3 FEET.
FRIDAY NIGHT
EAST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
SATURDAY
EAST WINDS 15 TO 25 KNOTS BECOMING NORTHEAST 10 TO
20 KNOTS. WAVES CALM TO 2 FEET.
SUNDAY
NORTHEAST WINDS 20 TO 30 KNOTS VEERING EAST. WAVES
BUILDING TO 2 TO 4 FEET, THEN SUBSIDING TO CALM TO 2 FEET.
LSZ264-162000-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
957 AM EDT WED SEP 16 2026
REST OF TODAY
NORTH WINDS LESS THAN 10 KNOTS VEERING SOUTHEAST
LATE. WAVES CALM TO 2 FEET.
TONIGHT
SOUTHEAST WINDS LESS THAN 10 KNOTS BECOMING SOUTH 5 TO
15 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS. WAVES CALM TO
2 FEET.
THURSDAY
WEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
THURSDAY NIGHT
NORTH WINDS 5 TO 15 KNOTS VEERING NORTHEAST
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
FRIDAY
EAST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
FRIDAY NIGHT
SOUTHEAST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
SATURDAY
EAST WINDS 5 TO 15 KNOTS BACKING NORTHEAST. WAVES
CALM TO 2 FEET.
SUNDAY
NORTHEAST WINDS 10 TO 20 KNOTS VEERING EAST. WAVES
BUILDING TO 1 TO 3 FEET, THEN SUBSIDING TO CALM TO 2 FEET.
LSZ265-162000-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
957 AM EDT WED SEP 16 2026
REST OF TODAY
NORTH WINDS 5 TO 15 KNOTS VEERING EAST LATE.
WAVES CALM TO 2 FEET.
TONIGHT
SOUTHEAST WINDS 10 TO 20 KNOTS VEERING SOUTH LATE. A
SLIGHT CHANCE OF SHOWERS. WAVES CALM TO 2 FEET.
THURSDAY
WEST WINDS 10 TO 20 KNOTS VEERING NORTHWEST LATE.
WAVES CALM TO 2 FEET.
THURSDAY NIGHT
NORTH WINDS 10 TO 20 KNOTS BECOMING NORTHEAST
15 TO 25 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 1 TO 3 FEET.
FRIDAY
EAST WINDS 10 TO 20 KNOTS. A SLIGHT CHANCE OF SHOWERS
BY MID AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
FRIDAY NIGHT
SOUTHEAST WINDS 10 TO 20 KNOTS. WAVES CALM TO
2 FEET.
SATURDAY
EAST WINDS 15 TO 25 KNOTS BECOMING NORTHEAST 10 TO
20 KNOTS. WAVES BUILDING TO 1 TO 3 FEET, THEN SUBSIDING TO CALM
TO 2 FEET.
SUNDAY
NORTHEAST WINDS 15 TO 25 KNOTS VEERING EAST. WAVES
BUILDING TO 1 TO 3 FEET, THEN SUBSIDING TO CALM TO 2 FEET.
LSZ266-162000-
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-
957 AM EDT WED SEP 16 2026
REST OF TODAY
NORTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS IN THE AFTERNOON, THEN VEERING NORTHEAST LATE. WAVES
1 TO 3 FEET SUBSIDING TO CALM TO 2 FEET.
TONIGHT
SOUTHEAST WINDS 5 TO 15 KNOTS VEERING SOUTH AFTER
MIDNIGHT. A SLIGHT CHANCE OF SHOWERS. WAVES CALM TO 2 FEET.
THURSDAY
SOUTHWEST WINDS 10 TO 20 KNOTS VEERING NORTHWEST
LATE. WAVES CALM TO 2 FEET.
THURSDAY NIGHT
NORTH WINDS 10 TO 20 KNOTS BECOMING NORTHEAST
15 TO 25 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 1 TO 3 FEET.
FRIDAY
EAST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO 15 KNOTS
BY MID AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
FRIDAY NIGHT
EAST WINDS 5 TO 15 KNOTS BECOMING SOUTHEAST 10 TO
20 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
SATURDAY
EAST WINDS 10 TO 20 KNOTS BACKING NORTHEAST. WAVES
CALM TO 2 FEET.
SUNDAY
NORTHEAST WINDS 10 TO 20 KNOTS VEERING EAST. WAVES
BUILDING TO 1 TO 3 FEET, THEN SUBSIDING TO CALM TO 2 FEET.
LSZ267-162000-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
957 AM EDT WED SEP 16 2026
REST OF TODAY
NORTHWEST WINDS 10 TO 20 KNOTS BECOMING NORTH
5 TO 15 KNOTS IN THE AFTERNOON. WAVES 1 TO 3 FEET SUBSIDING TO
CALM TO 2 FEET.
TONIGHT
EAST WINDS 5 TO 15 KNOTS VEERING SOUTH AFTER MIDNIGHT.
A SLIGHT CHANCE OF SHOWERS. WAVES CALM TO 2 FEET.
THURSDAY
SOUTHWEST WINDS 5 TO 15 KNOTS BECOMING WEST 10 TO
20 KNOTS IN THE AFTERNOON, THEN VEERING NORTHWEST LATE. WAVES
CALM TO 2 FEET.
THURSDAY NIGHT
NORTHWEST WINDS 10 TO 20 KNOTS VEERING NORTH
AFTER MIDNIGHT. WAVES BUILDING TO 1 TO 3 FEET.
FRIDAY
EAST WINDS 5 TO 15 KNOTS. WAVES SUBSIDING TO CALM TO
2 FEET.
FRIDAY NIGHT
EAST WINDS 5 TO 15 KNOTS BECOMING SOUTHEAST 10 TO
20 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
SATURDAY
SOUTHEAST WINDS 10 TO 20 KNOTS BACKING NORTHEAST.
WAVES BUILDING TO 1 TO 3 FEET, THEN SUBSIDING TO CALM TO 2 FEET.
SUNDAY
NORTHEAST WINDS 5 TO 15 KNOTS BECOMING EAST 10 TO
20 KNOTS. WAVES BUILDING TO 1 TO 3 FEET.
LSZ261-162000-
MAFOR 1615/
SUPERIOR WEST 11100 13200 11100 11200 12600. WAVES 1 FOOT OR
LESS.
SUPERIOR NORTH CENTRAL 12800 12300 12400 11510 11610. A CHANCE OF
SHOWERS TONIGHT. WAVES 2 FEET OR LESS.
SUPERIOR SOUTH CENTRAL 11800 11100 11200 12300 11410 11510 11610.
WAVES 2 FEET OR LESS.
SUPERIOR EAST 12700 11800 11200 11300 12400 11500. WAVES 2 TO 3
FEET THIS AFTERNOON. WAVES 2 FEET OR LESS TONIGHT AND THURSDAY
MORNING.
WFO MQT
EXPERIMENTAL MODERNIZED OPEN LAKE FORECAST IS AVAILABLE ONLINE AT
WEATHER.GOV/MQT/GLFTABLE
GRAPHICAL MARINE FORECASTS ARE AVAILABLE ONLINE AT:
WEATHER.GOV/GREATLAKES
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