789
FZUS63 KMQT 080202
GLFLS
OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
1002 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 TO LAKE SUPERIOR
TONIGHT. ON SATURDAY, A 29.5 INCH QUEBEC LOW AND A 30.0 INCH FOUR
CORNERS HIGH DRIVE WEAK AND ILL-DEFINED 29.9 INCH RIDGING/TROUGHING
OVER LAKE SUPERIOR THROUGH MONDAY NIGHT. WEAK RIDGING OF 30.0
INCHES, EXTENDING BEWEEN A 30.2 INCH BERMUDA HIGH AND 30.0 INCH
RIDGING OVER THE WESTERN CANADIAN PROVINCES, RETURNS FOR MONDAY AND
TUESDAY BEFORE DECREASING TO 29.9 INCHES ON WEDNESDAY.
LSZ162-080800-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
1002 PM EDT FRI AUG 7 2026 /902 PM CDT FRI AUG 7 2026/
REST OF TONIGHT
NORTHWEST WINDS 10 TO 20 KNOTS 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-
1002 PM EDT FRI AUG 7 2026
REST OF TONIGHT
WEST WINDS 5 TO 15 KNOTS VEERING NORTHWEST
AFTER MIDNIGHT, THEN BACKING WEST LATE. 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-
1002 PM EDT FRI AUG 7 2026
REST OF TONIGHT
WEST WINDS 5 TO 15 KNOTS VEERING NORTHWEST
LATE. 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-
1002 PM EDT FRI AUG 7 2026
REST OF TONIGHT
SOUTHWEST WINDS 10 TO 20 KNOTS VEERING WEST
AFTER MIDNIGHT, THEN INCREASING TO 15 TO 25 KNOTS LATE. A CHANCE
OF SHOWERS AND A SLIGHT CHANCE OF THUNDERSTORMS BY 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. A SLIGHT CHANCE OF SHOWERS THROUGH 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-
1002 PM EDT FRI AUG 7 2026
REST OF TONIGHT
SOUTH WINDS 10 TO 20 KNOTS VEERING WEST AFTER
MIDNIGHT, THEN VEERING NORTHWEST LATE. A CHANCE OF THUNDERSTORMS
BY MIDNIGHT. A CHANCE OF SHOWERS. WAVES 1 TO 3 FEET 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-
1002 PM EDT FRI AUG 7 2026
REST OF TONIGHT
SOUTH WINDS 10 TO 20 KNOTS VEERING WEST LATE.
SHOWERS LIKELY BY MIDNIGHT. A CHANCE OF THUNDERSTORMS. A CHANCE
OF SHOWERS AFTER MIDNIGHT. WAVES 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.
LSZ261-080800-
MAFOR 0803/
SUPERIOR WEST 12720 12610 14520. WAVES 2 FEET OR LESS.
SUPERIOR NORTH CENTRAL 12610 11710 11610 11620 13520. WAVES 1 TO
3 FEET.
SUPERIOR SOUTH CENTRAL 11520 11620 13630 12620 11510. A CHANCE OF
SHOWERS OVERNIGHT. WAVES 1 TO 3 FEET.
SUPERIOR EAST 11416 11610 12710 13610 11500. A CHANCE OF
THUNDERSTORMS OVERNIGHT. 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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