397
FZUS63 KMQT 080801
GLFLS
OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
400 AM EDT SAT AUG 8 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 29.8 INCH TROUGH CONTINUES TO MOVE EAST OF LAKE SUPERIOR EARLY
THIS MORNING. BY DAYBREAK, THE UP WILL BE SITUATED BETWEEN A 29.5
INCH QUEBEC LOW AND A 30.0 INCH FOUR CORNERS HIGH. THIS WILL DRIVE
WEAK AND ILL-DEFINED 29.9 INCH RIDGING/TROUGHING OVER LAKE SUPERIOR
THROUGH MONDAY NIGHT. WEAK RIDGING OF 30.0 INCHES, EXTENDING BETWEEN
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.
LSZ162-082000-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
400 AM EDT SAT AUG 8 2026 /300 AM CDT SAT AUG 8 2026/
EARLY THIS MORNING
WEST WINDS 10 TO 20 KNOTS. WAVES CALM TO
2 FEET.
TODAY
WEST WINDS 10 TO 20 KNOTS BACKING SOUTHWEST IN THE
AFTERNOON, THEN INCREASING TO 15 TO 25 KNOTS LATE. WAVES BUILDING
TO 1 TO 3 FEET.
TONIGHT
SOUTHWEST WINDS 10 TO 20 KNOTS BECOMING WEST 5 TO
15 KNOTS AFTER MIDNIGHT, THEN VEERING NORTH LATE. A CHANCE OF
SHOWERS. A SLIGHT CHANCE OF THUNDERSTORMS AFTER MIDNIGHT. WAVES
SUBSIDING TO CALM TO 2 FEET.
SUNDAY
SOUTHWEST WINDS 5 TO 15 KNOTS. A SLIGHT CHANCE OF
SHOWERS THROUGH EARLY AFTERNOON. WAVES CALM TO 2 FEET.
SUNDAY NIGHT
WEST WINDS 5 TO 15 KNOTS. 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 NORTH AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
TUESDAY
SOUTHWEST WINDS 5 TO 15 KNOTS VEERING NORTH. WAVES
CALM TO 2 FEET.
WEDNESDAY
WEST WINDS 5 TO 15 KNOTS VEERING NORTHWEST. WAVES
CALM TO 2 FEET.
LSZ263-082000-
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-
400 AM EDT SAT AUG 8 2026
EARLY THIS MORNING
WEST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
TODAY
WEST WINDS 5 TO 15 KNOTS BECOMING SOUTHWEST 15 TO
25 KNOTS IN THE AFTERNOON. WAVES BUILDING TO 2 TO 4 FEET.
TONIGHT
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
SOUTHWEST WINDS 5 TO 15 KNOTS VEERING WEST IN THE
AFTERNOON, THEN BACKING SOUTHWEST LATE. A 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
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
SOUTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
WEDNESDAY
WEST WINDS 5 TO 15 KNOTS VEERING NORTHWEST. WAVES
CALM TO 2 FEET.
LSZ264-082000-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
400 AM EDT SAT AUG 8 2026
EARLY THIS MORNING
WEST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
TODAY
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.
TONIGHT
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 SOUTHWEST LATE. A
SLIGHT CHANCE OF SHOWERS THROUGH EARLY AFTERNOON. WAVES CALM TO
2 FEET.
SUNDAY NIGHT
SOUTHWEST WINDS 5 TO 15 KNOTS DIMINISHING TO LESS
THAN 10 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
MONDAY
WEST WINDS LESS THAN 10 KNOTS BECOMING SOUTHWEST 5 TO
15 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
MONDAY NIGHT
SOUTHWEST WINDS 5 TO 15 KNOTS DIMINISHING TO LESS
THAN 10 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
TUESDAY
WEST WINDS LESS THAN 10 KNOTS BACKING SOUTHWEST. WAVES
CALM TO 2 FEET.
WEDNESDAY
WEST WINDS 5 TO 15 KNOTS VEERING NORTHWEST. WAVES
CALM TO 2 FEET.
LSZ265-082000-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
400 AM EDT SAT AUG 8 2026
EARLY THIS MORNING
WEST WINDS 10 TO 20 KNOTS. WAVES CALM TO
2 FEET.
TODAY
WEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO 20 KNOTS
LATE. WAVES CALM TO 2 FEET.
TONIGHT
SOUTHWEST WINDS 10 TO 20 KNOTS VEERING WEST LATE. A
CHANCE OF SHOWERS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
SUNDAY
SOUTHWEST WINDS 10 TO 20 KNOTS BECOMING EAST 5 TO
15 KNOTS IN THE AFTERNOON. A CHANCE OF SHOWERS. WAVES CALM TO
2 FEET.
SUNDAY NIGHT
SOUTHEAST WINDS 5 TO 15 KNOTS VEERING WEST AFTER
MIDNIGHT. A SLIGHT CHANCE OF SHOWERS THROUGH MIDNIGHT. WAVES CALM
TO 2 FEET.
MONDAY
WEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
MONDAY NIGHT
SOUTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
TUESDAY
SOUTHWEST WINDS 5 TO 15 KNOTS VEERING WEST. WAVES CALM
TO 2 FEET.
WEDNESDAY
NORTHWEST WINDS 10 TO 20 KNOTS. WAVES CALM TO
2 FEET.
LSZ266-082000-
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-
400 AM EDT SAT AUG 8 2026
EARLY THIS MORNING
NORTHWEST WINDS 10 TO 20 KNOTS. PATCHY FOG.
WAVES CALM TO 2 FEET.
TODAY
WEST WINDS 10 TO 20 KNOTS. PATCHY FOG THROUGH EARLY
AFTERNOON. WAVES BUILDING TO 1 TO 3 FEET, THEN SUBSIDING TO CALM
TO 2 FEET.
TONIGHT
SOUTHWEST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS AFTER MIDNIGHT, THEN VEERING WEST LATE. A CHANCE OF
SHOWERS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
SUNDAY
WEST WINDS 10 TO 20 KNOTS BECOMING SOUTHWEST 5 TO
15 KNOTS IN THE AFTERNOON, THEN BACKING NORTHEAST LATE. A CHANCE
OF SHOWERS. WAVES CALM TO 2 FEET.
SUNDAY NIGHT
EAST WINDS 5 TO 15 KNOTS BACKING NORTH AFTER
MIDNIGHT. A SLIGHT CHANCE OF SHOWERS THROUGH MIDNIGHT. WAVES CALM
TO 2 FEET.
MONDAY
WEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
MONDAY NIGHT
WEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
TUESDAY
SOUTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
WEDNESDAY
NORTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
LSZ267-082000-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
400 AM EDT SAT AUG 8 2026
EARLY THIS MORNING
WEST WINDS 10 TO 20 KNOTS. AREAS OF DENSE
FOG. WAVES CALM TO 2 FEET.
TODAY
WEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO 15 KNOTS
LATE. AREAS OF DENSE FOG THROUGH EARLY AFTERNOON. WAVES CALM TO
2 FEET.
TONIGHT
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
WEST WINDS 10 TO 20 KNOTS BECOMING SOUTHWEST 5 TO
15 KNOTS IN THE AFTERNOON, THEN BACKING NORTHEAST LATE. 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
NORTHWEST WINDS 5 TO 15 KNOTS BACKING WEST BY MID
AFTERNOON. 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.
LSZ261-081400-
MAFOR 0809/
SUPERIOR WEST 12610 14520 11610 11710. A CHANCE OF SHOWERS
OVERNIGHT. WAVES 2 FEET OR LESS.
SUPERIOR NORTH CENTRAL 12610 11620 13520 11510 11610. A CHANCE OF
SHOWERS OVERNIGHT. WAVES 1 TO 3 FEET.
SUPERIOR SOUTH CENTRAL 14620 11620 11510 11420 11520. WAVES 1 TO
3 FEET.
SUPERIOR EAST 11714 11614 12610 11600 11500 12510. 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
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