069
FZUS63 KMQT 161958
GLFLS
OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
357 PM 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
HIGH PRESSURE OF 30.4 INCHES TODAY WEAKENS TO 30.3 INCHES OVER
QUEBEC EARLY THURSDAY MORNING AS 29.9 INCH LOW PRESSURE MOVES ALONG
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.
LSZ162-170800-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
357 PM EDT WED SEP 16 2026 /257 PM CDT WED SEP 16 2026/
LATE THIS AFTERNOON
EAST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
TONIGHT
NORTHEAST WINDS 5 TO 15 KNOTS BECOMING EAST LESS THAN
10 KNOTS AFTER MIDNIGHT, THEN VEERING WEST LATE. A SLIGHT CHANCE
OF SHOWERS THROUGH MIDNIGHT. 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, THEN VEERING EAST LATE. WAVES
BUILDING TO 1 TO 3 FEET.
FRIDAY
EAST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO 25 KNOTS
BY MID AFTERNOON. A CHANCE OF SHOWERS. WAVES 1 TO 3 FEET.
FRIDAY NIGHT
EAST WINDS 15 TO 25 KNOTS. A CHANCE OF SHOWERS.
WAVES BUILDING TO 2 TO 4 FEET.
SATURDAY
EAST WINDS 20 TO 30 KNOTS BACKING NORTHEAST BY MID
AFTERNOON. WAVES BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET,
THEN SUBSIDING TO 1 TO 3 FEET.
SATURDAY NIGHT
NORTHEAST WINDS 15 TO 25 KNOTS. WAVES SUBSIDING
TO CALM TO 2 FEET, THEN BUILDING TO 1 TO 3 FEET.
SUNDAY
NORTHEAST GALES TO 35 KNOTS BECOMING EAST 20 TO
30 KNOTS. WAVES BUILDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET,
THEN SUBSIDING TO 1 TO 3 FEET.
MONDAY
EAST WINDS 15 TO 25 KNOTS. WAVES SUBSIDING TO CALM TO
2 FEET.
LSZ263-170800-
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-
357 PM EDT WED SEP 16 2026
LATE THIS AFTERNOON
EAST WINDS 5 TO 15 KNOTS. 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
THROUGH MIDNIGHT. 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, THEN BECOMING EAST 5 TO 15 KNOTS
LATE. WAVES BUILDING TO 1 TO 3 FEET.
FRIDAY
EAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO 20 KNOTS
BY MID AFTERNOON. A CHANCE OF SHOWERS BY MID AFTERNOON. WAVES
SUBSIDING TO CALM TO 2 FEET.
FRIDAY NIGHT
EAST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS. WAVES BUILDING TO
1 TO 3 FEET, THEN SUBSIDING TO CALM TO 2 FEET.
SATURDAY
EAST WINDS 10 TO 20 KNOTS BECOMING NORTHEAST 15 TO
25 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
SATURDAY NIGHT
NORTHEAST WINDS 15 TO 25 KNOTS. WAVES BUILDING
TO 1 TO 3 FEET.
SUNDAY
NORTHEAST GALES TO 35 KNOTS BECOMING EAST 20 TO
30 KNOTS. WAVES BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET,
THEN SUBSIDING TO CALM TO 2 FEET.
MONDAY
EAST WINDS 15 TO 25 KNOTS. WAVES BUILDING TO 1 TO
3 FEET, THEN SUBSIDING TO CALM TO 2 FEET.
LSZ264-170800-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
357 PM EDT WED SEP 16 2026
LATE THIS AFTERNOON
SOUTHEAST WINDS LESS THAN 10 KNOTS. WAVES
CALM TO 2 FEET.
TONIGHT
SOUTHEAST WINDS LESS THAN 10 KNOTS BECOMING SOUTH 5 TO
15 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF SHOWERS THROUGH
MIDNIGHT. WAVES CALM TO 2 FEET.
THURSDAY
WEST WINDS 5 TO 15 KNOTS VEERING NORTHWEST IN THE
AFTERNOON, THEN BACKING WEST LATE. WAVES CALM TO 2 FEET.
THURSDAY NIGHT
NORTH WINDS 5 TO 15 KNOTS VEERING NORTHEAST
LATE. WAVES BUILDING TO 1 TO 3 FEET, THEN SUBSIDING TO CALM TO
2 FEET.
FRIDAY
EAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO 20 KNOTS
BY MID AFTERNOON. WAVES CALM TO 2 FEET.
FRIDAY NIGHT
SOUTHEAST WINDS 10 TO 20 KNOTS DIMINISHING TO
5 TO 15 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
SATURDAY
EAST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
SATURDAY NIGHT
NORTHEAST WINDS 5 TO 15 KNOTS INCREASING TO
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
SUNDAY
NORTHEAST WINDS 15 TO 25 KNOTS BECOMING EAST 10 TO
20 KNOTS. WAVES BUILDING TO 2 TO 4 FEET, THEN SUBSIDING TO CALM
TO 2 FEET.
MONDAY
EAST WINDS 10 TO 20 KNOTS BECOMING SOUTHEAST 5 TO
15 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET.
LSZ265-170800-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
357 PM EDT WED SEP 16 2026
LATE THIS AFTERNOON
EAST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
TONIGHT
SOUTHEAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS AFTER MIDNIGHT, THEN VEERING SOUTH LATE. A SLIGHT CHANCE
OF SHOWERS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
THURSDAY
WEST WINDS 10 TO 20 KNOTS VEERING NORTHWEST LATE.
WAVES CALM TO 2 FEET.
THURSDAY NIGHT
NORTHWEST WINDS 10 TO 20 KNOTS VEERING NORTH
AFTER MIDNIGHT, THEN BECOMING NORTHEAST 15 TO 25 KNOTS LATE.
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, THEN
BUILDING TO 1 TO 3 FEET.
FRIDAY NIGHT
SOUTHEAST WINDS 15 TO 25 KNOTS. A CHANCE OF
SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET, THEN BUILDING TO 1 TO
3 FEET.
SATURDAY
SOUTHEAST WINDS 15 TO 25 KNOTS BACKING EAST BY MID
AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
SATURDAY NIGHT
NORTHEAST WINDS 10 TO 20 KNOTS. WAVES BUILDING
TO 1 TO 3 FEET.
SUNDAY
NORTHEAST WINDS 20 TO 30 KNOTS BECOMING EAST 15 TO
25 KNOTS. WAVES BUILDING TO 2 TO 4 FEET, THEN SUBSIDING TO 1 TO
3 FEET.
MONDAY
EAST WINDS 15 TO 25 KNOTS BECOMING SOUTHEAST 10 TO
20 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET.
LSZ266-170800-
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-
357 PM EDT WED SEP 16 2026
LATE THIS AFTERNOON
EAST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
TONIGHT
EAST WINDS 5 TO 15 KNOTS VEERING SOUTH AFTER MIDNIGHT.
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 INCREASING TO 15 TO
25 KNOTS AFTER MIDNIGHT, THEN BECOMING NORTHEAST 10 TO 20 KNOTS
LATE. 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
SOUTHEAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS. WAVES CALM TO
2 FEET.
SATURDAY
SOUTHEAST WINDS 10 TO 20 KNOTS BACKING EAST BY MID
AFTERNOON. WAVES BUILDING TO 1 TO 3 FEET, THEN SUBSIDING TO CALM
TO 2 FEET.
SATURDAY NIGHT
NORTHEAST WINDS 5 TO 15 KNOTS INCREASING TO
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
SUNDAY
NORTHEAST WINDS 15 TO 25 KNOTS VEERING EAST. WAVES
BUILDING TO 2 TO 4 FEET, THEN SUBSIDING TO 1 TO 3 FEET.
MONDAY
EAST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO CALM TO
2 FEET.
LSZ267-170800-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
357 PM EDT WED SEP 16 2026
LATE THIS AFTERNOON
NORTH WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
TONIGHT
EAST WINDS 5 TO 15 KNOTS VEERING SOUTH LATE. WAVES
CALM TO 2 FEET.
THURSDAY
SOUTHWEST WINDS 5 TO 15 KNOTS VEERING WEST IN THE
AFTERNOON, THEN BECOMING NORTHWEST 10 TO 20 KNOTS LATE. WAVES
CALM TO 2 FEET.
THURSDAY NIGHT
NORTHWEST WINDS 15 TO 25 KNOTS VEERING NORTH
AFTER MIDNIGHT, THEN BECOMING NORTHEAST 10 TO 20 KNOTS LATE.
WAVES BUILDING TO 2 TO 4 FEET.
FRIDAY
NORTHEAST WINDS 5 TO 15 KNOTS VEERING EAST 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
SOUTHEAST WINDS 10 TO 20 KNOTS BACKING EAST BY MID
AFTERNOON. WAVES BUILDING TO 1 TO 3 FEET, THEN SUBSIDING TO CALM
TO 2 FEET.
SATURDAY NIGHT
NORTHEAST WINDS 10 TO 20 KNOTS. WAVES CALM TO
2 FEET.
SUNDAY
NORTHEAST WINDS 10 TO 20 KNOTS BECOMING EAST 15 TO
25 KNOTS. WAVES BUILDING TO 1 TO 3 FEET.
MONDAY
EAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO 20 KNOTS.
WAVES SUBSIDING TO CALM TO 2 FEET.
LSZ261-170200-
MAFOR 1621/
SUPERIOR WEST 13200 11300 14600. WAVES 1 FOOT OR LESS.
SUPERIOR NORTH CENTRAL 12300 11400 11410 11510 11610 12710. WAVES
1 FOOT OR LESS.
SUPERIOR SOUTH CENTRAL 11200 11300 11310 12410 11520 11620 11720.
WAVES 2 FEET OR LESS.
SUPERIOR EAST 11800 11100 11300 12400 12510 11610. WAVES 2 FEET
OR LESS.
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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