035
FZUS63 KMQT 152001
GLFLS
OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
401 PM EDT TUE SEP 15 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
A 29.4 INCH LOW IS WORKING INTO NORTHERN ONTARIO THIS AFTERNOON,
BRINGING 29.7 INCH TROUGHING ACROSS LAKE SUPERIOR. MEANWHILE, 30.2
INCH HIGH PRESSURE OVER THE NORTHERN PLAINS STRENGTHENS TO 30.4
INCHES AS IT CROSSES THE UPPER GREAT LAKES ON TOMORROW. HIGH
PRESSURE RIDGING AROUND 30.3 INCHES THEN SETTLES OVER LAKE SUPERIOR
THROUGH THE REST OF THE WORKWEEK.
LSZ162-160800-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
401 PM EDT TUE SEP 15 2026 /301 PM CDT TUE SEP 15 2026/
...GALE WARNING IN EFFECT UNTIL 5 PM EDT /4 PM CDT/ THIS
AFTERNOON...
LATE THIS AFTERNOON
WEST WINDS 20 TO 30 KNOTS. WAVES 4 TO
7 FEET OCCASIONALLY TO 9 FEET SUBSIDING TO 3 TO 5 FEET
OCCASIONALLY TO 7 FEET.
TONIGHT
WEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO 15 KNOTS
AFTER MIDNIGHT, THEN VEERING NORTHWEST LATE. WAVES SUBSIDING TO
CALM TO 2 FEET.
WEDNESDAY
NORTH WINDS 5 TO 15 KNOTS VEERING EAST IN THE
AFTERNOON. WAVES CALM TO 2 FEET.
WEDNESDAY NIGHT
EAST WINDS 5 TO 15 KNOTS DIMINISHING TO 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. WAVES CALM TO 2 FEET.
FRIDAY
EAST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO 25 KNOTS
BY MID AFTERNOON. WAVES BUILDING TO 1 TO 3 FEET.
FRIDAY NIGHT
EAST WINDS 15 TO 25 KNOTS. A CHANCE OF SHOWERS.
WAVES 1 TO 3 FEET.
SATURDAY
NORTHEAST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS. WAVES BUILDING TO 2 TO 4 FEET, THEN SUBSIDING TO 1 TO
3 FEET.
SUNDAY
NORTHEAST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS. WAVES BUILDING TO 2 TO 4 FEET, THEN SUBSIDING TO CALM
TO 2 FEET.
LSZ263-160800-
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-
401 PM EDT TUE SEP 15 2026
..GALE WARNING IN EFFECT UNTIL 8 PM EDT THIS EVENING
LATE THIS AFTERNOON
WEST GALES TO 35 KNOTS. WAVES 9 TO 12 FEET
OCCASIONALLY TO 15 FEET SUBSIDING TO 6 TO 9 FEET OCCASIONALLY TO
11 FEET.
TONIGHT
WEST WINDS 20 TO 30 KNOTS DIMINISHING TO 10 TO
20 KNOTS AFTER MIDNIGHT, THEN VEERING NORTHWEST LATE. WAVES
SUBSIDING TO CALM TO 2 FEET.
WEDNESDAY
NORTH WINDS 5 TO 15 KNOTS DIMINISHING TO LESS THAN
10 KNOTS IN THE AFTERNOON, THEN BECOMING EAST 5 TO 15 KNOTS LATE.
WAVES CALM TO 2 FEET.
WEDNESDAY NIGHT
EAST WINDS 5 TO 15 KNOTS 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 VEERING NORTHEAST
AFTER MIDNIGHT. WAVES 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
EAST WINDS 10 TO 20 KNOTS. A CHANCE OF SHOWERS.
WAVES BUILDING TO 1 TO 3 FEET, THEN SUBSIDING TO CALM TO 2 FEET.
SATURDAY
EAST WINDS 15 TO 25 KNOTS BACKING NORTHEAST. 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 CALM
TO 2 FEET.
LSZ264-160800-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
401 PM EDT TUE SEP 15 2026
..GALE WARNING IN EFFECT UNTIL 8 PM EDT THIS EVENING
LATE THIS AFTERNOON
WEST GALES TO 40 KNOTS. WAVES 10 TO
14 FEET OCCASIONALLY TO 18 FEET SUBSIDING TO 8 TO 11 FEET
OCCASIONALLY TO 14 FEET.
TONIGHT
WEST WINDS 20 TO 30 KNOTS DIMINISHING TO 10 TO
20 KNOTS AFTER MIDNIGHT, THEN BECOMING NORTHWEST 5 TO 15 KNOTS
LATE. WAVES SUBSIDING TO 1 TO 3 FEET.
WEDNESDAY
NORTHWEST WINDS 5 TO 15 KNOTS BECOMING NORTH LESS
THAN 10 KNOTS IN THE AFTERNOON, THEN VEERING SOUTHEAST LATE.
WAVES SUBSIDING TO CALM TO 2 FEET.
WEDNESDAY NIGHT
SOUTHEAST WINDS 5 TO 15 KNOTS VEERING SOUTH
AFTER MIDNIGHT. 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 VEERING NORTHEAST
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
FRIDAY
EAST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
FRIDAY NIGHT
EAST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
SATURDAY
EAST WINDS 10 TO 20 KNOTS BACKING NORTHEAST. WAVES
CALM TO 2 FEET.
SUNDAY
EAST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO 15 KNOTS.
WAVES BUILDING TO 1 TO 3 FEET, THEN SUBSIDING TO CALM TO 2 FEET.
LSZ265-160800-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
401 PM EDT TUE SEP 15 2026
..GALE WARNING IN EFFECT UNTIL 8 PM EDT THIS EVENING
LATE THIS AFTERNOON
WEST GALES TO 40 KNOTS. WAVES 5 TO 9 FEET
OCCASIONALLY TO 11 FEET.
TONIGHT
WEST GALES TO 35 KNOTS DIMINISHING TO 15 TO 25 KNOTS
AFTER MIDNIGHT, THEN BECOMING NORTHWEST 10 TO 20 KNOTS LATE.
WAVES SUBSIDING TO CALM TO 2 FEET.
WEDNESDAY
NORTHWEST WINDS 5 TO 15 KNOTS VEERING EAST LATE.
WAVES CALM TO 2 FEET.
WEDNESDAY NIGHT
SOUTHEAST WINDS 10 TO 20 KNOTS VEERING
SOUTHWEST LATE. A SLIGHT CHANCE OF SHOWERS. WAVES CALM TO 2 FEET.
THURSDAY
WEST WINDS 10 TO 20 KNOTS VEERING NORTHWEST BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
THURSDAY NIGHT
NORTH WINDS 10 TO 20 KNOTS VEERING NORTHEAST
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
FRIDAY
EAST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO 25 KNOTS
BY MID AFTERNOON. WAVES CALM TO 2 FEET.
FRIDAY NIGHT
SOUTHEAST WINDS 15 TO 25 KNOTS. A CHANCE OF
SHOWERS. WAVES BUILDING TO 1 TO 3 FEET, THEN SUBSIDING TO CALM TO
2 FEET.
SATURDAY
EAST WINDS 15 TO 25 KNOTS BACKING NORTHEAST. A CHANCE
OF SHOWERS. WAVES BUILDING TO 2 TO 4 FEET, THEN SUBSIDING 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.
LSZ266-160800-
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-
401 PM EDT TUE SEP 15 2026
..GALE WARNING IN EFFECT UNTIL 8 PM EDT THIS EVENING
LATE THIS AFTERNOON
WEST GALES TO 40 KNOTS. WAVES 10 TO
14 FEET OCCASIONALLY TO 18 FEET SUBSIDING TO 8 TO 11 FEET
OCCASIONALLY TO 14 FEET.
TONIGHT
WEST GALES TO 35 KNOTS DIMINISHING TO 15 TO 25 KNOTS
AFTER MIDNIGHT, THEN BECOMING NORTHWEST 10 TO 20 KNOTS LATE.
WAVES SUBSIDING TO 1 TO 3 FEET.
WEDNESDAY
NORTHWEST WINDS 5 TO 15 KNOTS DIMINISHING TO LESS
THAN 10 KNOTS IN THE AFTERNOON, THEN BECOMING NORTHEAST 5 TO
15 KNOTS LATE. WAVES SUBSIDING TO CALM TO 2 FEET.
WEDNESDAY NIGHT
SOUTHEAST WINDS 5 TO 15 KNOTS VEERING SOUTH
AFTER MIDNIGHT. A SLIGHT CHANCE OF SHOWERS. WAVES CALM TO 2 FEET.
THURSDAY
WEST WINDS 10 TO 20 KNOTS VEERING NORTHWEST BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
THURSDAY NIGHT
NORTH WINDS 10 TO 20 KNOTS VEERING NORTHEAST
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 10 TO 20 KNOTS VEERING SOUTHEAST AFTER
MIDNIGHT. A CHANCE OF SHOWERS. WAVES BUILDING TO 1 TO 3 FEET.
SATURDAY
EAST WINDS 10 TO 20 KNOTS BACKING NORTHEAST. A CHANCE
OF SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET, THEN BUILDING TO
1 TO 3 FEET.
SUNDAY
NORTHEAST WINDS 15 TO 25 KNOTS BECOMING EAST 10 TO
20 KNOTS. WAVES BUILDING TO 2 TO 4 FEET, THEN SUBSIDING TO 1 TO
3 FEET.
LSZ267-160800-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
401 PM EDT TUE SEP 15 2026
..GALE WARNING IN EFFECT UNTIL 8 PM EDT THIS EVENING
LATE THIS AFTERNOON
WEST GALES TO 40 KNOTS. WAVES 5 TO 8 FEET
OCCASIONALLY TO 10 FEET BUILDING TO 7 TO 10 FEET OCCASIONALLY TO
13 FEET.
TONIGHT
WEST GALES TO 35 KNOTS DIMINISHING TO 15 TO 25 KNOTS
AFTER MIDNIGHT, THEN BECOMING NORTHWEST 10 TO 20 KNOTS LATE.
WAVES SUBSIDING TO 2 TO 4 FEET.
WEDNESDAY
NORTHWEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS IN THE AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
WEDNESDAY NIGHT
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 NORTHWEST
10 TO 20 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
THURSDAY NIGHT
NORTHWEST WINDS 15 TO 25 KNOTS BECOMING
NORTHEAST 10 TO 20 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 2 TO
4 FEET, THEN SUBSIDING 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. A CHANCE OF SHOWERS. WAVES CALM TO
2 FEET.
SATURDAY
EAST WINDS 10 TO 20 KNOTS BACKING NORTHEAST. WAVES
BUILDING TO 1 TO 3 FEET, THEN SUBSIDING TO 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.
LSZ261-160200-
MAFOR 1521/
SUPERIOR WEST...GALE WARNING IN EFFECT...11640 11620 11610 12710
11800 11100 11200. WAVES 5 TO 8 FEET SUBSIDING TO 1 TO 3 FEET
TONIGHT. WAVES 1 FOOT OR LESS WEDNESDAY.
SUPERIOR NORTH CENTRAL...GALE WARNING IN EFFECT...11660 11640
11630 11720 12710 12800. WAVES 9 TO 13 FEET SUBSIDING TO 3 TO 5
FEET TONIGHT. WAVES 1 TO 3 FEET WEDNESDAY.
SUPERIOR SOUTH CENTRAL...GALE WARNING IN EFFECT...11660 11650
11630 11730 11720 11710 11700 11800. WAVES 6 TO 10 FEET SUBSIDING
TO 2 TO 3 FEET TONIGHT. WAVES 1 TO 3 FEET SUBSIDING TO 1 FOOT OR
LESS WEDNESDAY.
SUPERIOR EAST...GALE WARNING IN EFFECT...11650 11640 11630 11620
12710 12700. WAVES 7 TO 10 FEET SUBSIDING TO 5 TO 8 FEET TONIGHT.
WAVES 2 TO 4 FEET WEDNESDAY.
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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