663
FZUS63 KMQT 070801
GLFLS
OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
401 AM 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
LAKE SUPERIOR IS CURRENTLY SITUATED BETWEEN A 29.5 INCH LOW ALONG
THE SHORE OF HUDSON BAY AT THE MANITOBA/ONTARIO LINE AND A 30.2 INCH
BERMUDA HIGH. A PASSING COLD FRONT BRINGS 29.8 INCH TROUGHING ACROSS
THE LAKE BEGINNING LATER THIS MORNING BEFORE 29.9 INCH RIDGING
RETURNS LATE TONIGHT 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,
WITH A WEAK 29.8 INCH TROUGH POTENTIALLY PASSING THROUGH SUNDAY
EVENING. THE HIGH PRESSURE RIDGING COULD INCREASE TO 30.0 INCHES BY
TUESDAY.
LSZ162-072000-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
401 AM EDT FRI AUG 7 2026 /301 AM CDT FRI AUG 7 2026/
EARLY THIS MORNING
SOUTHWEST WINDS 10 TO 20 KNOTS. WAVES 1 TO
3 FEET.
TODAY
SOUTHWEST WINDS 10 TO 20 KNOTS. A CHANCE OF SHOWERS AND
A SLIGHT CHANCE OF THUNDERSTORMS. WAVES SUBSIDING TO CALM TO
2 FEET.
TONIGHT
WEST WINDS 10 TO 20 KNOTS BECOMING NORTHWEST 5 TO
15 KNOTS AFTER MIDNIGHT, THEN BECOMING WEST 10 TO 20 KNOTS 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, THEN SUBSIDING TO CALM
TO 2 FEET.
SATURDAY NIGHT
WEST WINDS 5 TO 15 KNOTS. A SLIGHT CHANCE OF
THUNDERSTORMS THROUGH MIDNIGHT. A CHANCE OF SHOWERS. WAVES CALM
TO 2 FEET.
SUNDAY
WEST WINDS 5 TO 15 KNOTS BACKING SOUTH BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
SUNDAY NIGHT
WEST WINDS 5 TO 15 KNOTS VEERING NORTHWEST AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
MONDAY
SOUTHWEST WINDS 5 TO 15 KNOTS VEERING NORTHWEST. WAVES
CALM TO 2 FEET.
TUESDAY
SOUTHWEST WINDS 5 TO 15 KNOTS VEERING NORTHWEST. WAVES
CALM TO 2 FEET.
LSZ263-072000-
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 AM EDT FRI AUG 7 2026
EARLY THIS MORNING
SOUTHWEST WINDS 15 TO 25 KNOTS. WAVES 1 TO
3 FEET.
TODAY
SOUTHWEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS LATE. A CHANCE OF SHOWERS THROUGH EARLY AFTERNOON. A
CHANCE OF THUNDERSTORMS. SHOWERS LIKELY BY MID AFTERNOON. WAVES
SUBSIDING TO CALM TO 2 FEET.
TONIGHT
WEST WINDS 5 TO 15 KNOTS VEERING NORTHWEST AFTER
MIDNIGHT, THEN BACKING WEST LATE. A SLIGHT CHANCE OF SHOWERS
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 1 TO 3 FEET.
SATURDAY NIGHT
SOUTHWEST WINDS 10 TO 20 KNOTS BECOMING WEST
5 TO 15 KNOTS AFTER MIDNIGHT. 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 SOUTHWEST BY MID
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
WEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
TUESDAY
WEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS. WAVES CALM TO 2 FEET.
LSZ264-072000-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
401 AM EDT FRI AUG 7 2026
EARLY THIS MORNING
SOUTH WINDS 15 TO 25 KNOTS. WAVES 2 TO
4 FEET.
TODAY
SOUTHWEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS LATE. A CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES
SUBSIDING TO CALM TO 2 FEET.
TONIGHT
WEST WINDS 5 TO 15 KNOTS VEERING NORTHWEST AFTER
MIDNIGHT. A SLIGHT CHANCE OF SHOWERS 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 CALM TO
2 FEET.
SATURDAY NIGHT
SOUTHWEST WINDS 5 TO 15 KNOTS VEERING WEST
AFTER MIDNIGHT. A SLIGHT CHANCE OF SHOWERS AFTER MIDNIGHT. WAVES
CALM TO 2 FEET.
SUNDAY
WEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST BY MID
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
WEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
TUESDAY
WEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST. WAVES CALM
TO 2 FEET.
LSZ265-072000-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
401 AM EDT FRI AUG 7 2026
EARLY THIS MORNING
SOUTH WINDS 15 TO 25 KNOTS. WAVES 1 TO
3 FEET SUBSIDING TO CALM TO 2 FEET.
TODAY
SOUTH WINDS 10 TO 20 KNOTS VEERING WEST LATE. SHOWERS
LIKELY AND A CHANCE OF THUNDERSTORMS BY MID AFTERNOON. WAVES CALM
TO 2 FEET.
TONIGHT
SOUTHWEST WINDS 10 TO 20 KNOTS VEERING WEST AFTER
MIDNIGHT, THEN BECOMING NORTHWEST 15 TO 25 KNOTS LATE. A SLIGHT
CHANCE OF SHOWERS AND THUNDERSTORMS THROUGH MIDNIGHT. WAVES CALM
TO 2 FEET.
SATURDAY
WEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS LATE. WAVES CALM TO 2 FEET.
SATURDAY NIGHT
SOUTHWEST WINDS 10 TO 20 KNOTS. A CHANCE OF
SHOWERS AND A SLIGHT CHANCE OF THUNDERSTORMS AFTER MIDNIGHT.
WAVES CALM TO 2 FEET.
SUNDAY
WEST WINDS 10 TO 20 KNOTS BECOMING EAST 5 TO 15 KNOTS
BY MID AFTERNOON. WAVES CALM TO 2 FEET.
SUNDAY NIGHT
SOUTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
MONDAY
WEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
TUESDAY
WEST WINDS 5 TO 15 KNOTS BACKING SOUTH. WAVES CALM TO
2 FEET.
LSZ266-072000-
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 AM EDT FRI AUG 7 2026
EARLY THIS MORNING
SOUTH WINDS 15 TO 25 KNOTS. WAVES 2 TO
4 FEET.
TODAY
SOUTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO 20 KNOTS
IN THE AFTERNOON. A CHANCE OF SHOWERS AND THUNDERSTORMS BY MID
AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
TONIGHT
SOUTHWEST WINDS 10 TO 20 KNOTS VEERING NORTHWEST LATE.
SHOWERS LIKELY AND A CHANCE OF THUNDERSTORMS THROUGH MIDNIGHT,
THEN A SLIGHT 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 CALM TO
2 FEET.
SATURDAY NIGHT
SOUTHWEST WINDS 5 TO 15 KNOTS INCREASING TO
10 TO 20 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS AND A SLIGHT
CHANCE OF THUNDERSTORMS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
SUNDAY
WEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO 15 KNOTS
BY MID AFTERNOON. WAVES CALM TO 2 FEET.
SUNDAY NIGHT
NORTHEAST WINDS 5 TO 15 KNOTS VEERING SOUTHWEST
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
MONDAY
WEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
TUESDAY
WEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST. WAVES CALM
TO 2 FEET.
LSZ267-072000-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
401 AM EDT FRI AUG 7 2026
EARLY THIS MORNING
SOUTH WINDS 10 TO 20 KNOTS. WAVES 1 TO
3 FEET.
TODAY
SOUTH WINDS 10 TO 20 KNOTS. A SLIGHT CHANCE OF SHOWERS
AND THUNDERSTORMS BY MID AFTERNOON. WAVES SUBSIDING TO CALM TO
2 FEET.
TONIGHT
SOUTH WINDS 10 TO 20 KNOTS VEERING SOUTHWEST AFTER
MIDNIGHT, THEN VEERING NORTHWEST LATE. A CHANCE OF SHOWERS AND
THUNDERSTORMS. WAVES CALM TO 2 FEET.
SATURDAY
NORTHWEST WINDS 10 TO 20 KNOTS BACKING WEST IN THE
AFTERNOON. WAVES CALM TO 2 FEET.
SATURDAY NIGHT
SOUTHWEST WINDS 5 TO 15 KNOTS INCREASING TO
10 TO 20 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF SHOWERS AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
SUNDAY
WEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO 15 KNOTS
BY MID AFTERNOON. WAVES CALM TO 2 FEET.
SUNDAY NIGHT
NORTH WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
MONDAY
NORTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
TUESDAY
WEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST. WAVES CALM
TO 2 FEET.
LSZ261-071400-
MAFOR 0709/
SUPERIOR WEST 12520 11510 11610 11510 11610 12710. A CHANCE OF
SHOWERS THIS AFTERNOON AND EVENING. WAVES 1 TO 3 FEET.
SUPERIOR NORTH CENTRAL 11430 12520 11510 11506 11500 11600 11700.
A CHANCE OF THUNDERSTORMS THIS AFTERNOON AND EVENING. WAVES 2 TO
4 FEET SUBSIDING TO 1 TO 3 FEET TODAY. WAVES 1 TO 2 FEET TONIGHT.
SUPERIOR SOUTH CENTRAL 11430 12420 11310 11616 11416 11520 11620.
A CHANCE OF THUNDERSTORMS THIS AFTERNOON AND EVENING. WAVES 1 TO
3 FEET.
SUPERIOR EAST 13420 12410 11416 11516 11600. A CHANCE OF
THUNDERSTORMS THIS EVENING. 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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