083
FZUS63 KMQT 061401
GLFLS
OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
1001 AM EDT THU AUG 6 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 30.1 INCH HIGH OVER THE UPPER GREAT LAKES TODAY KEEPS 30.0 INCH
RIDGING OVER LAKE SUPERIOR UNTIL TONIGHT AS THE WEAK HIGH TRAVELS
EAST TOWARDS THE ST. LAWRENCE RIVER. BY FRIDAY, A COLD FRONT BRINGS
29.8 INCH TROUGHING ACROSS THE LAKE BEFORE 29.9 INCH RIDGING RETURNS
WITH A HIGH DIGGING TOWARDS CHICAGO LATE FRIDAY NIGHT INTO SATURDAY.
WHILE SOME WEAK 29.8 INCH TROUGHING COULD BE SEEN OVER LAKE SUPERIOR
SATURDAY NIGHT, WEAK 29.9 INCH RIDGING SETTLES ONCE AGAIN OVER THE
LAKE SUNDAY AND MONDAY. THE HIGH PRESSURE RIDGING COULD INCREASE TO
30.0 INCHES BY TUESDAY.
LSZ162-062000-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
1001 AM EDT THU AUG 6 2026 /901 AM CDT THU AUG 6 2026/
REST OF TODAY
SOUTHWEST WINDS 15 TO 25 KNOTS BACKING SOUTH
LATE. WAVES 1 TO 3 FEET BUILDING TO 2 TO 4 FEET, THEN SUBSIDING
TO 1 TO 3 FEET.
TONIGHT
SOUTH WINDS 15 TO 25 KNOTS VEERING SOUTHWEST AFTER
MIDNIGHT, THEN DIMINISHING TO 10 TO 20 KNOTS LATE. A SLIGHT
CHANCE OF SHOWERS AND THUNDERSTORMS AFTER MIDNIGHT. WAVES 1 TO
3 FEET.
FRIDAY
SOUTHWEST WINDS 10 TO 20 KNOTS VEERING WEST LATE. A
CHANCE OF SHOWERS AND A SLIGHT CHANCE OF THUNDERSTORMS. WAVES
SUBSIDING TO CALM TO 2 FEET.
FRIDAY NIGHT
WEST WINDS 10 TO 20 KNOTS. WAVES CALM TO 2 FEET.
SATURDAY
WEST WINDS 10 TO 20 KNOTS BACKING SOUTHWEST BY MID
AFTERNOON. WAVES BUILDING TO 1 TO 3 FEET, THEN SUBSIDING TO CALM
TO 2 FEET.
SATURDAY NIGHT
WEST WINDS 5 TO 15 KNOTS VEERING NORTHWEST
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
SUNDAY
SOUTHWEST WINDS 5 TO 15 KNOTS VEERING NORTH. WAVES CALM
TO 2 FEET.
MONDAY
NORTH WINDS 5 TO 15 KNOTS BACKING NORTHWEST. WAVES CALM
TO 2 FEET.
LSZ263-062000-
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-
1001 AM EDT THU AUG 6 2026
REST OF TODAY
SOUTHWEST WINDS 15 TO 25 KNOTS INCREASING TO
20 TO 30 KNOTS IN THE AFTERNOON, THEN BECOMING SOUTH 15 TO
25 KNOTS LATE. WAVES 2 TO 4 FEET BUILDING TO 3 TO 5 FEET
OCCASIONALLY TO 7 FEET, THEN SUBSIDING TO 2 TO 4 FEET.
TONIGHT
SOUTH WINDS 15 TO 25 KNOTS VEERING SOUTHWEST LATE.
WAVES SUBSIDING TO 1 TO 3 FEET, THEN BUILDING TO 2 TO 4 FEET.
FRIDAY
SOUTHWEST WINDS 10 TO 20 KNOTS. A CHANCE OF SHOWERS AND
THUNDERSTORMS. WAVES SUBSIDING TO CALM TO 2 FEET.
FRIDAY NIGHT
WEST WINDS 5 TO 15 KNOTS. A SLIGHT CHANCE OF
SHOWERS THROUGH MIDNIGHT. WAVES CALM TO 2 FEET.
SATURDAY
WEST WINDS 10 TO 20 KNOTS BACKING SOUTHWEST BY MID
AFTERNOON. WAVES BUILDING TO 1 TO 3 FEET.
SATURDAY NIGHT
WEST WINDS 5 TO 15 KNOTS. WAVES SUBSIDING TO
CALM TO 2 FEET.
SUNDAY
WEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO 15 KNOTS.
WAVES CALM TO 2 FEET.
MONDAY
SOUTHWEST WINDS 5 TO 15 KNOTS VEERING WEST. WAVES CALM
TO 2 FEET.
LSZ264-062000-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
1001 AM EDT THU AUG 6 2026
REST OF TODAY
SOUTHWEST WINDS 10 TO 20 KNOTS INCREASING TO
15 TO 25 KNOTS IN THE AFTERNOON, THEN BACKING SOUTH LATE. WAVES
1 TO 3 FEET BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET, THEN
SUBSIDING TO 2 TO 4 FEET.
TONIGHT
SOUTH WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS AFTER MIDNIGHT, THEN VEERING SOUTHWEST LATE. WAVES
SUBSIDING TO 1 TO 3 FEET, THEN BUILDING TO 2 TO 4 FEET.
FRIDAY
SOUTHWEST WINDS 10 TO 20 KNOTS BECOMING SOUTH 5 TO
15 KNOTS LATE. A CHANCE OF SHOWERS AND A SLIGHT CHANCE OF
THUNDERSTORMS. WAVES SUBSIDING TO CALM TO 2 FEET.
FRIDAY NIGHT
WEST WINDS 5 TO 15 KNOTS. A SLIGHT CHANCE OF
SHOWERS THROUGH MIDNIGHT. WAVES CALM TO 2 FEET.
SATURDAY
WEST WINDS 10 TO 20 KNOTS BACKING SOUTHWEST BY MID
AFTERNOON. WAVES BUILDING TO 1 TO 3 FEET.
SATURDAY NIGHT
WEST WINDS 5 TO 15 KNOTS. WAVES SUBSIDING TO
CALM TO 2 FEET.
SUNDAY
WEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST. WAVES CALM
TO 2 FEET.
MONDAY
SOUTHWEST WINDS 5 TO 15 KNOTS VEERING WEST. WAVES CALM
TO 2 FEET.
LSZ265-062000-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
1001 AM EDT THU AUG 6 2026
REST OF TODAY
SOUTH WINDS 10 TO 20 KNOTS BACKING SOUTHEAST
LATE. WAVES CALM TO 2 FEET.
TONIGHT
SOUTH WINDS 15 TO 25 KNOTS. WAVES BUILDING TO 2 TO
4 FEET, THEN SUBSIDING TO 1 TO 3 FEET.
FRIDAY
SOUTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS IN THE AFTERNOON, THEN VEERING WEST LATE. A CHANCE OF
SHOWERS AND A SLIGHT CHANCE OF THUNDERSTORMS BY MID AFTERNOON.
WAVES SUBSIDING TO CALM TO 2 FEET.
FRIDAY NIGHT
WEST WINDS 10 TO 20 KNOTS. SHOWERS LIKELY AND A
SLIGHT CHANCE OF THUNDERSTORMS THROUGH MIDNIGHT. WAVES CALM TO
2 FEET.
SATURDAY
WEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
SATURDAY NIGHT
SOUTHWEST WINDS 10 TO 20 KNOTS VEERING WEST
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
SUNDAY
WEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST. WAVES CALM
TO 2 FEET.
MONDAY
WEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO 15 KNOTS.
WAVES CALM TO 2 FEET.
LSZ266-062000-
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-
1001 AM EDT THU AUG 6 2026
REST OF TODAY
SOUTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS IN THE AFTERNOON, THEN BECOMING SOUTHEAST 10 TO 20 KNOTS
LATE. WAVES CALM TO 2 FEET BUILDING TO 1 TO 3 FEET.
TONIGHT
SOUTH WINDS 15 TO 25 KNOTS. WAVES BUILDING TO 3 TO
5 FEET OCCASIONALLY TO 7 FEET, THEN SUBSIDING TO 2 TO 4 FEET.
FRIDAY
SOUTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS IN THE AFTERNOON. A CHANCE OF SHOWERS AND A SLIGHT
CHANCE OF THUNDERSTORMS BY MID AFTERNOON. WAVES SUBSIDING TO CALM
TO 2 FEET.
FRIDAY NIGHT
WEST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS AFTER MIDNIGHT. SHOWERS AND A SLIGHT CHANCE OF
THUNDERSTORMS THROUGH MIDNIGHT, THEN A SLIGHT CHANCE OF SHOWERS
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
SATURDAY
WEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
SATURDAY NIGHT
SOUTHWEST WINDS 5 TO 15 KNOTS BECOMING WEST
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
SUNDAY
WEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST. WAVES CALM
TO 2 FEET.
MONDAY
SOUTHWEST WINDS 5 TO 15 KNOTS VEERING WEST. WAVES CALM
TO 2 FEET.
LSZ267-062000-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
1001 AM EDT THU AUG 6 2026
REST OF TODAY
SOUTH WINDS 5 TO 15 KNOTS BACKING SOUTHEAST
LATE. WAVES CALM TO 2 FEET.
TONIGHT
SOUTH WINDS 10 TO 20 KNOTS. WAVES BUILDING TO 1 TO
3 FEET.
FRIDAY
SOUTH WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO CALM TO
2 FEET.
FRIDAY NIGHT
SOUTH WINDS 10 TO 20 KNOTS VEERING WEST AFTER
MIDNIGHT. SHOWERS THROUGH MIDNIGHT. A SLIGHT CHANCE OF
THUNDERSTORMS. A CHANCE OF SHOWERS AFTER MIDNIGHT. WAVES CALM TO
2 FEET.
SATURDAY
WEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
SATURDAY NIGHT
SOUTHWEST WINDS 5 TO 15 KNOTS INCREASING TO
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
SUNDAY
NORTHWEST WINDS 5 TO 15 KNOTS BACKING WEST. WAVES CALM
TO 2 FEET.
MONDAY
WEST WINDS 5 TO 15 KNOTS VEERING NORTHWEST. WAVES CALM
TO 2 FEET.
LSZ261-062000-
MAFOR 0615/
SUPERIOR WEST 12530 12420 11430 12530 11520. WAVES 1 TO 3 FEET.
SUPERIOR NORTH CENTRAL 11530 11430 13420 11430 11530 11520. WAVES
1 TO 3 FEET BUILDING TO 2 TO 4 FEET THIS AFTERNOON AND TONIGHT.
WAVES 2 TO 4 FEET FRIDAY MORNING.
SUPERIOR SOUTH CENTRAL 11410 11320 11330 12440 12430 11420. WAVES
2 FEET OR LESS THIS AFTERNOON. WAVES 1 TO 3 FEET BUILDING TO 2 TO
4 FEET TONIGHT. WAVES 1 TO 3 FEET FRIDAY MORNING.
SUPERIOR EAST 12410 11310 11320 12430 12420. WAVES 2 FEET OR LESS
THIS AFTERNOON. WAVES 1 TO 3 FEET BUILDING TO 2 TO 4 FEET
TONIGHT. WAVES 2 TO 4 FEET FRIDAY 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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