496
FZUS63 KMQT 072001
GLFLS
OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
401 PM EDT FRI AUG 7 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 PASSING COLD FRONT BRINGS 29.8 INCH TROUGHING ACROSS THE LAKE
THROUGH TONIGHT BEFORE 29.9 INCH RIDGING RETURNS SATURDAY. WEAK 29.8
INCH TROUGHING MOVES OVER LAKE SUPERIOR SATURDAY NIGHT, THEN BENIGN
RIDGING/TROUGHING OF AROUND 29.9 INCHES MAINTAINS OVER THE LAKE
THROUGH SUNDAY NIGHT. WEAK RIDGING OF 29.9 TO 30.0 INCHES RETURNS
FOR MONDAY THROUGH WEDNESDAY.
LSZ162-080800-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
401 PM EDT FRI AUG 7 2026 /301 PM CDT FRI AUG 7 2026/
LATE THIS AFTERNOON
WEST WINDS 10 TO 20 KNOTS. A SLIGHT CHANCE
OF SHOWERS AND THUNDERSTORMS. WAVES CALM TO 2 FEET.
TONIGHT
WEST WINDS 10 TO 20 KNOTS VEERING NORTHWEST AFTER
MIDNIGHT, THEN BACKING WEST LATE. WAVES CALM TO 2 FEET.
SATURDAY
WEST WINDS 10 TO 20 KNOTS BACKING SOUTHWEST IN THE
AFTERNOON. WAVES BUILDING TO 1 TO 3 FEET.
SATURDAY NIGHT
SOUTHWEST WINDS 5 TO 15 KNOTS VEERING WEST
AFTER MIDNIGHT. A CHANCE OF SHOWERS AND A SLIGHT CHANCE OF
THUNDERSTORMS. WAVES SUBSIDING TO CALM TO 2 FEET.
SUNDAY
WEST WINDS 5 TO 15 KNOTS BACKING SOUTH BY MID
AFTERNOON. A SLIGHT CHANCE OF SHOWERS THROUGH EARLY AFTERNOON.
WAVES CALM TO 2 FEET.
SUNDAY NIGHT
WEST WINDS 5 TO 15 KNOTS VEERING NORTHWEST AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
MONDAY
WEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
MONDAY NIGHT
WEST WINDS 5 TO 15 KNOTS VEERING NORTHWEST AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
TUESDAY
SOUTHWEST WINDS 5 TO 15 KNOTS VEERING NORTHWEST. WAVES
CALM TO 2 FEET.
WEDNESDAY
WEST WINDS 5 TO 15 KNOTS VEERING NORTH. WAVES CALM
TO 2 FEET.
LSZ263-080800-
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 FRI AUG 7 2026
LATE THIS AFTERNOON
SOUTHWEST WINDS 5 TO 15 KNOTS. A CHANCE OF
SHOWERS AND THUNDERSTORMS. WAVES CALM TO 2 FEET.
TONIGHT
WEST WINDS 5 TO 15 KNOTS VEERING NORTHWEST AFTER
MIDNIGHT, THEN BACKING WEST LATE. A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS THROUGH MIDNIGHT. WAVES CALM TO 2 FEET.
SATURDAY
WEST WINDS 5 TO 15 KNOTS BECOMING SOUTHWEST 15 TO
25 KNOTS IN THE AFTERNOON. WAVES BUILDING TO 2 TO 4 FEET.
SATURDAY NIGHT
SOUTHWEST WINDS 10 TO 20 KNOTS BECOMING WEST
5 TO 15 KNOTS AFTER MIDNIGHT, THEN BACKING SOUTHWEST LATE. A
CHANCE OF SHOWERS. A SLIGHT CHANCE OF THUNDERSTORMS AFTER
MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
SUNDAY
WEST WINDS 5 TO 15 KNOTS BACKING SOUTH BY MID
AFTERNOON. A SLIGHT CHANCE OF SHOWERS. WAVES CALM TO 2 FEET.
SUNDAY NIGHT
WEST WINDS 5 TO 15 KNOTS DIMINISHING TO LESS THAN
10 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
MONDAY
WEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
MONDAY NIGHT
SOUTHWEST WINDS 5 TO 15 KNOTS BECOMING WEST LESS
THAN 10 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
TUESDAY
WEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
WEDNESDAY
WEST WINDS 5 TO 15 KNOTS VEERING NORTHWEST. WAVES
CALM TO 2 FEET.
LSZ264-080800-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
401 PM EDT FRI AUG 7 2026
LATE THIS AFTERNOON
SOUTHWEST WINDS 5 TO 15 KNOTS. SHOWERS
LIKELY AND A CHANCE OF THUNDERSTORMS. WAVES CALM TO 2 FEET.
TONIGHT
SOUTHWEST WINDS 5 TO 15 KNOTS VEERING NORTHWEST LATE.
A CHANCE OF SHOWERS AND A SLIGHT CHANCE OF THUNDERSTORMS THROUGH
MIDNIGHT. WAVES CALM TO 2 FEET.
SATURDAY
WEST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO 20 KNOTS
IN THE AFTERNOON, THEN BACKING SOUTHWEST LATE. WAVES BUILDING TO
1 TO 3 FEET.
SATURDAY NIGHT
SOUTHWEST WINDS 10 TO 20 KNOTS BECOMING WEST
5 TO 15 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS AFTER MIDNIGHT.
WAVES SUBSIDING TO CALM TO 2 FEET.
SUNDAY
WEST WINDS 5 TO 15 KNOTS BACKING SOUTH BY MID
AFTERNOON. A SLIGHT CHANCE OF SHOWERS THROUGH EARLY AFTERNOON.
WAVES CALM TO 2 FEET.
SUNDAY NIGHT
SOUTHWEST WINDS 5 TO 15 KNOTS BECOMING WEST LESS
THAN 10 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
MONDAY
SOUTHWEST WINDS LESS THAN 10 KNOTS INCREASING TO 5 TO
15 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
MONDAY NIGHT
SOUTHWEST WINDS 5 TO 15 KNOTS BECOMING WEST LESS
THAN 10 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
TUESDAY
WEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
WEDNESDAY
WEST WINDS 5 TO 15 KNOTS VEERING NORTHWEST. WAVES
CALM TO 2 FEET.
LSZ265-080800-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
401 PM EDT FRI AUG 7 2026
LATE THIS AFTERNOON
EAST WINDS 10 TO 20 KNOTS. SHOWERS AND A
CHANCE OF THUNDERSTORMS. WAVES CALM TO 2 FEET.
TONIGHT
SOUTHWEST WINDS 10 TO 20 KNOTS VEERING WEST AFTER
MIDNIGHT, THEN INCREASING TO 15 TO 25 KNOTS LATE. SHOWERS LIKELY
AND A CHANCE OF THUNDERSTORMS THROUGH MIDNIGHT. WAVES CALM TO
2 FEET.
SATURDAY
WEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS LATE. WAVES BUILDING TO 1 TO 3 FEET, THEN SUBSIDING TO
CALM TO 2 FEET.
SATURDAY NIGHT
SOUTHWEST WINDS 10 TO 20 KNOTS BECOMING WEST
15 TO 25 KNOTS LATE. A CHANCE OF SHOWERS AND A SLIGHT CHANCE OF
THUNDERSTORMS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
SUNDAY
SOUTHWEST WINDS 10 TO 20 KNOTS BECOMING EAST 5 TO
15 KNOTS BY MID AFTERNOON. A CHANCE OF SHOWERS. WAVES CALM TO
2 FEET.
SUNDAY NIGHT
SOUTH WINDS 5 TO 15 KNOTS VEERING WEST AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
MONDAY
SOUTHWEST WINDS 5 TO 15 KNOTS BACKING NORTHEAST BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
MONDAY NIGHT
SOUTHWEST WINDS 5 TO 15 KNOTS VEERING WEST AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
TUESDAY
WEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
WEDNESDAY
NORTHWEST WINDS 10 TO 20 KNOTS. WAVES CALM TO
2 FEET.
LSZ266-080800-
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 FRI AUG 7 2026
LATE THIS AFTERNOON
SOUTH WINDS 10 TO 20 KNOTS. SHOWERS LIKELY
AND A CHANCE OF THUNDERSTORMS. WAVES CALM TO 2 FEET BUILDING TO
1 TO 3 FEET.
TONIGHT
SOUTH WINDS 10 TO 20 KNOTS VEERING WEST AFTER
MIDNIGHT, THEN VEERING NORTHWEST LATE. SHOWERS LIKELY AND A
CHANCE OF THUNDERSTORMS THROUGH MIDNIGHT, THEN A SLIGHT CHANCE OF
SHOWERS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET, THEN
BUILDING TO 1 TO 3 FEET.
SATURDAY
WEST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS IN THE AFTERNOON, THEN DIMINISHING TO 10 TO 20 KNOTS
LATE. WAVES SUBSIDING TO CALM TO 2 FEET, THEN BUILDING TO 1 TO
3 FEET.
SATURDAY NIGHT
SOUTHWEST WINDS 5 TO 15 KNOTS INCREASING TO
10 TO 20 KNOTS AFTER MIDNIGHT, THEN VEERING WEST LATE. A CHANCE
OF SHOWERS AND A SLIGHT CHANCE OF THUNDERSTORMS AFTER MIDNIGHT.
WAVES SUBSIDING TO CALM TO 2 FEET.
SUNDAY
WEST WINDS 10 TO 20 KNOTS BECOMING EAST 5 TO 15 KNOTS
BY MID AFTERNOON. A SLIGHT CHANCE OF THUNDERSTORMS THROUGH EARLY
AFTERNOON. A CHANCE OF SHOWERS. WAVES CALM TO 2 FEET.
SUNDAY NIGHT
EAST WINDS 5 TO 15 KNOTS BACKING NORTH AFTER
MIDNIGHT. A CHANCE OF SHOWERS THROUGH MIDNIGHT. WAVES CALM TO
2 FEET.
MONDAY
SOUTHWEST WINDS 5 TO 15 KNOTS VEERING WEST BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
MONDAY NIGHT
SOUTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
TUESDAY
WEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
WEDNESDAY
NORTHWEST WINDS 10 TO 20 KNOTS. WAVES CALM TO
2 FEET.
LSZ267-080800-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
401 PM EDT FRI AUG 7 2026
LATE THIS AFTERNOON
SOUTH WINDS 10 TO 20 KNOTS. A CHANCE OF
SHOWERS AND THUNDERSTORMS. WAVES CALM TO 2 FEET.
TONIGHT
SOUTH WINDS 10 TO 20 KNOTS VEERING WEST LATE. SHOWERS
LIKELY THROUGH MIDNIGHT. A CHANCE OF THUNDERSTORMS. A CHANCE OF
SHOWERS AFTER MIDNIGHT. WAVES BUILDING TO 1 TO 3 FEET, THEN
SUBSIDING TO CALM TO 2 FEET.
SATURDAY
NORTHWEST WINDS 10 TO 20 KNOTS BACKING WEST IN THE
AFTERNOON, THEN DIMINISHING TO 5 TO 15 KNOTS LATE. WAVES BUILDING
TO 1 TO 3 FEET, THEN SUBSIDING TO CALM TO 2 FEET.
SATURDAY NIGHT
SOUTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTH
AFTER MIDNIGHT, THEN BECOMING SOUTHWEST 10 TO 20 KNOTS LATE. A
SLIGHT CHANCE OF SHOWERS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
SUNDAY
SOUTHWEST WINDS 10 TO 20 KNOTS BECOMING EAST 5 TO
15 KNOTS BY MID AFTERNOON. SHOWERS LIKELY AND A SLIGHT CHANCE OF
THUNDERSTORMS THROUGH EARLY AFTERNOON, THEN A CHANCE OF SHOWERS
BY MID AFTERNOON. WAVES CALM TO 2 FEET.
SUNDAY NIGHT
NORTHEAST WINDS 5 TO 15 KNOTS BACKING NORTH AFTER
MIDNIGHT. A CHANCE OF SHOWERS THROUGH MIDNIGHT. WAVES CALM TO
2 FEET.
MONDAY
NORTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
MONDAY NIGHT
NORTHWEST WINDS 5 TO 15 KNOTS BACKING WEST AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
TUESDAY
NORTHWEST WINDS 5 TO 15 KNOTS BACKING WEST. WAVES CALM
TO 2 FEET.
WEDNESDAY
WEST WINDS 5 TO 15 KNOTS BECOMING NORTHWEST 10 TO
20 KNOTS. WAVES CALM TO 2 FEET.
LSZ261-080200-
MAFOR 0721/
SUPERIOR WEST 11610 11620 12720 12610 12520. A CHANCE OF SHOWERS
AND THUNDERSTORMS THIS EVENING. WAVES 2 FEET OR LESS.
SUPERIOR NORTH CENTRAL 11506 11510 12610 11710 11610 11620 11520.
A CHANCE OF THUNDERSTORMS THIS EVENING. WAVES 1 TO 2 FEET.
SUPERIOR SOUTH CENTRAL 11226 11516 11520 11620 13630 11620. A
CHANCE OF THUNDERSTORMS THIS EVENING. WAVES 1 TO 3 FEET.
SUPERIOR EAST 11416 11426 11416 11610 12710 12610. A CHANCE OF
THUNDERSTORMS TONIGHT. WAVES 1 TO 3 FEET.
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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