134
FZUS63 KMQT 110801
GLFLS
OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
401 AM EDT FRI JUL 11 2025
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 WEAK 29.9 INCH RIDGE HOLDS OVER EASTERN LAKE SUPERIOR THIS
MORNING. TODAY THROUGH SATURDAY AFTERNOON, A 29.8 INCH TROUGH WILL
MOVE ACROSS THE LAKE. THIS TROUGH WILL FIRST BE ASSOCIATED WITH A
29.7 INCH LOW OVER HUDSON BAY, BUT BY SATURDAY MORNING THE TROUGH
WILL BE ASSOCIATED WITH A SECONDARY 29.7 INCH LOW OVER NORTHERN
ONTARIO. THIS LOW DEEPENS TO 29.6 INCHES SATURDAY NIGHT AS IT DRIFTS
NORTHEAST TOWARDS HUDSON BAY WHILE 30.0 INCH HIGH PRESSURE BUILDS
JUST SOUTH OF THE GREAT LAKES BASIN. THE HIGH MAINTAINS STRENGTH AND
POSITION ON SUNDAY WHILE THE LOW DEEPENS TO 29.4 INCHES OVER HUDSON
BAY. ON MONDAY, LAKE SUPERIOR WILL BE BETWEEN HIGH PRESSURE OF 30.0
INCHES OVER MUCH OF THE EASTERN CONUS AND BROAD 29.8 INCH TROUGHING
OVER THE NORTHERN PLAINS. THIS TROUGH REACHES LAKE SUPERIOR ON
TUESDAY.
LSZ162-112000-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
401 AM EDT FRI JUL 11 2025 /301 AM CDT FRI JUL 11 2025/
EARLY THIS MORNING
EAST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
TODAY
SOUTH WINDS 5 TO 15 KNOTS BACKING EAST LATE. A SLIGHT
CHANCE OF SHOWERS AND THUNDERSTORMS BY MID AFTERNOON. WAVES CALM
TO 2 FEET.
TONIGHT
EAST WINDS 5 TO 15 KNOTS BACKING NORTHEAST AFTER
MIDNIGHT, THEN VEERING SOUTHWEST LATE. A CHANCE OF SHOWERS AND
THUNDERSTORMS. WAVES CALM TO 2 FEET.
SATURDAY
SOUTHWEST WINDS 5 TO 15 KNOTS BECOMING WEST 10 TO
20 KNOTS LATE. SHOWERS LIKELY THROUGH EARLY AFTERNOON. A CHANCE
OF THUNDERSTORMS. A CHANCE OF SHOWERS BY MID AFTERNOON. WAVES
CALM TO 2 FEET.
SATURDAY NIGHT
WEST WINDS 10 TO 20 KNOTS. WAVES CALM TO
2 FEET.
SUNDAY
SOUTHWEST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS BY MID AFTERNOON. WAVES BUILDING TO 1 TO 3 FEET.
SUNDAY NIGHT
SOUTHWEST WINDS 15 TO 25 KNOTS BECOMING WEST
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
MONDAY
SOUTHWEST WINDS 5 TO 15 KNOTS BECOMING EAST 10 TO
20 KNOTS. A CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES CALM TO
2 FEET.
TUESDAY
EAST WINDS 10 TO 20 KNOTS BACKING NORTHEAST. A CHANCE
OF SHOWERS. A CHANCE OF THUNDERSTORMS. SHOWERS LIKELY. WAVES CALM
TO 2 FEET.
LSZ263-112000-
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 JUL 11 2025
EARLY THIS MORNING
SOUTHWEST WINDS LESS THAN 10 KNOTS. WAVES
CALM TO 2 FEET.
TODAY
SOUTHWEST WINDS LESS THAN 10 KNOTS BACKING SOUTH IN THE
AFTERNOON, THEN BECOMING EAST 5 TO 15 KNOTS LATE. A SLIGHT CHANCE
OF SHOWERS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
TONIGHT
EAST WINDS 5 TO 15 KNOTS BACKING NORTHEAST AFTER
MIDNIGHT, THEN DIMINISHING TO LESS THAN 10 KNOTS LATE. A SLIGHT
CHANCE OF SHOWERS THROUGH MIDNIGHT. A SLIGHT CHANCE OF
THUNDERSTORMS. SHOWERS LIKELY AFTER MIDNIGHT. WAVES CALM TO
2 FEET.
SATURDAY
WEST WINDS LESS THAN 10 KNOTS INCREASING TO 5 TO
15 KNOTS IN THE AFTERNOON, THEN BACKING SOUTHWEST LATE. SHOWERS
LIKELY THROUGH EARLY AFTERNOON. A CHANCE OF THUNDERSTORMS. A
CHANCE OF SHOWERS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
SATURDAY NIGHT
WEST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 1 TO 3 FEET.
SUNDAY
SOUTHWEST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS BY MID AFTERNOON. WAVES BUILDING TO 2 TO 4 FEET.
SUNDAY NIGHT
SOUTHWEST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING
TO 1 TO 3 FEET.
MONDAY
WEST WINDS 5 TO 15 KNOTS BACKING EAST. A CHANCE OF
SHOWERS AND THUNDERSTORMS. WAVES SUBSIDING TO CALM TO 2 FEET.
TUESDAY
SOUTH WINDS 5 TO 15 KNOTS BACKING EAST. A CHANCE OF
SHOWERS AND THUNDERSTORMS. WAVES CALM TO 2 FEET.
LSZ264-112000-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
401 AM EDT FRI JUL 11 2025
EARLY THIS MORNING
SOUTH WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
TODAY
SOUTHWEST WINDS LESS THAN 10 KNOTS BACKING SOUTH IN THE
AFTERNOON, THEN BECOMING SOUTHEAST 5 TO 15 KNOTS LATE. WAVES CALM
TO 2 FEET.
TONIGHT
EAST WINDS 5 TO 15 KNOTS VEERING SOUTHEAST AFTER
MIDNIGHT. A CHANCE OF SHOWERS. WAVES CALM TO 2 FEET.
SATURDAY
WEST WINDS LESS THAN 10 KNOTS INCREASING TO 5 TO
15 KNOTS IN THE AFTERNOON, THEN BACKING SOUTHWEST LATE. SHOWERS
LIKELY THROUGH EARLY AFTERNOON. A SLIGHT CHANCE OF THUNDERSTORMS.
A CHANCE OF SHOWERS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
SATURDAY NIGHT
WEST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF SHOWERS THROUGH
MIDNIGHT. WAVES BUILDING TO 1 TO 3 FEET.
SUNDAY
SOUTHWEST WINDS 10 TO 20 KNOTS. WAVES BUILDING TO 2 TO
4 FEET.
SUNDAY NIGHT
SOUTHWEST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.
MONDAY
WEST WINDS 5 TO 15 KNOTS BACKING SOUTHEAST. WAVES
SUBSIDING TO CALM TO 2 FEET.
TUESDAY
SOUTHEAST WINDS 5 TO 15 KNOTS BACKING NORTHEAST. A
CHANCE OF SHOWERS. WAVES CALM TO 2 FEET.
LSZ265-112000-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
401 AM EDT FRI JUL 11 2025
EARLY THIS MORNING
SOUTH WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
TODAY
SOUTH WINDS 5 TO 15 KNOTS BACKING EAST IN THE AFTERNOON,
THEN BECOMING SOUTHEAST 10 TO 20 KNOTS LATE. WAVES CALM TO
2 FEET.
TONIGHT
SOUTHEAST WINDS 5 TO 15 KNOTS VEERING SOUTH LATE. A
CHANCE OF SHOWERS. WAVES CALM TO 2 FEET.
SATURDAY
WEST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO 20 KNOTS
LATE. SHOWERS LIKELY AND A SLIGHT CHANCE OF THUNDERSTORMS. WAVES
CALM TO 2 FEET.
SATURDAY NIGHT
WEST WINDS 10 TO 20 KNOTS. A SLIGHT CHANCE OF
SHOWERS THROUGH MIDNIGHT. WAVES CALM TO 2 FEET.
SUNDAY
WEST WINDS 10 TO 20 KNOTS BACKING SOUTHWEST BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
SUNDAY NIGHT
SOUTHWEST WINDS 10 TO 20 KNOTS. WAVES CALM TO
2 FEET.
MONDAY
WEST WINDS 10 TO 20 KNOTS BECOMING SOUTHEAST 5 TO
15 KNOTS. WAVES CALM TO 2 FEET.
TUESDAY
SOUTHEAST WINDS 10 TO 20 KNOTS VEERING SOUTH. A CHANCE
OF SHOWERS. WAVES CALM TO 2 FEET.
LSZ266-112000-
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 JUL 11 2025
EARLY THIS MORNING
SOUTH WINDS 10 TO 20 KNOTS. WAVES CALM TO
2 FEET.
TODAY
SOUTH WINDS 5 TO 15 KNOTS BACKING SOUTHEAST IN THE
AFTERNOON, THEN BECOMING EAST 10 TO 20 KNOTS LATE. WAVES CALM TO
2 FEET.
TONIGHT
SOUTHEAST WINDS 5 TO 15 KNOTS. A CHANCE OF SHOWERS. A
SLIGHT CHANCE OF THUNDERSTORMS AFTER MIDNIGHT. WAVES CALM TO
2 FEET.
SATURDAY
SOUTH WINDS 5 TO 15 KNOTS VEERING WEST IN THE
AFTERNOON. SHOWERS LIKELY AND A SLIGHT CHANCE OF THUNDERSTORMS.
WAVES CALM TO 2 FEET.
SATURDAY NIGHT
WEST WINDS 10 TO 20 KNOTS. A SLIGHT CHANCE OF
SHOWERS THROUGH MIDNIGHT. WAVES BUILDING TO 1 TO 3 FEET.
SUNDAY
WEST WINDS 10 TO 20 KNOTS BACKING SOUTHWEST BY MID
AFTERNOON. WAVES BUILDING TO 2 TO 4 FEET, THEN SUBSIDING TO 1 TO
3 FEET.
SUNDAY NIGHT
SOUTH WINDS 10 TO 20 KNOTS VEERING SOUTHWEST
AFTER MIDNIGHT. WAVES 1 TO 3 FEET.
MONDAY
WEST WINDS 10 TO 20 KNOTS BECOMING SOUTHEAST 5 TO
15 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET.
TUESDAY
SOUTH WINDS 10 TO 20 KNOTS. A CHANCE OF SHOWERS. WAVES
BUILDING TO 1 TO 3 FEET, THEN SUBSIDING TO CALM TO 2 FEET.
LSZ267-112000-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
401 AM EDT FRI JUL 11 2025
EARLY THIS MORNING
SOUTH WINDS 10 TO 20 KNOTS. WAVES CALM TO
2 FEET.
TODAY
SOUTH WINDS 5 TO 15 KNOTS BACKING EAST IN THE AFTERNOON.
WAVES CALM TO 2 FEET.
TONIGHT
SOUTHEAST WINDS 10 TO 20 KNOTS. A CHANCE OF SHOWERS.
WAVES CALM TO 2 FEET.
SATURDAY
SOUTHEAST WINDS 5 TO 15 KNOTS VEERING SOUTHWEST IN
THE AFTERNOON, THEN VEERING WEST LATE. A CHANCE OF SHOWERS
THROUGH EARLY AFTERNOON. A CHANCE OF THUNDERSTORMS. SHOWERS
LIKELY BY MID AFTERNOON. WAVES CALM TO 2 FEET.
SATURDAY NIGHT
SOUTHWEST WINDS 10 TO 20 KNOTS VEERING WEST
AFTER MIDNIGHT. A CHANCE OF SHOWERS THROUGH MIDNIGHT. WAVES CALM
TO 2 FEET.
SUNDAY
SOUTHWEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
SUNDAY NIGHT
SOUTH WINDS 10 TO 20 KNOTS VEERING SOUTHWEST
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
MONDAY
WEST WINDS 10 TO 20 KNOTS BACKING SOUTHEAST. WAVES CALM
TO 2 FEET.
TUESDAY
SOUTH WINDS 10 TO 20 KNOTS. A CHANCE OF SHOWERS. WAVES
BUILDING TO 1 TO 3 FEET, THEN SUBSIDING TO CALM TO 2 FEET.
LSZ261-111400-
MAFOR 1109/
SUPERIOR WEST 11400 11500 11400 11300 12200 12100. A CHANCE OF
SHOWERS THIS EVENING, THEN A CHANCE OF SHOWERS AND THUNDERSTORMS
OVERNIGHT. WAVES 1 FOOT OR LESS.
SUPERIOR NORTH CENTRAL 11400 11500 11400 13300 12310. WAVES 2
FEET OR LESS.
SUPERIOR SOUTH CENTRAL 11410 11400 11300 13310 11300 11400. WAVES
2 FEET OR LESS.
SUPERIOR EAST 11410 11400 12300 11200 11210 12310. WAVES 1 TO 2
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
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page