642
FZUS63 KMQT 280801
GLFLS
OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
400 AM EDT FRI AUG 28 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 30.1 INCH HIGH PRESSURE OVER LAKE SUPERIOR THIS MORNING INCREASES
TO 30.2 INCHES LATER TODAY OVER THE UPPER GREAT LAKES BEFORE
CONTINUING INTO NEW ENGLAND ON SATURDAY. SATURDAY NIGHT, A LOW
PRESSURE OVER THE CENTRAL TO NORTHERN PLAINS DEEPENS TO 29.6 INCHES.
THIS LOW LIFTS NORTH INTO THE CANADIAN PRAIRIES EARLY NEXT WEEK,
WITH HEIGHTS OVER LAKE SUPERIOR SUBSEQUENTLY FALLING TO 29.8 INCHES
BY MONDAY AFTERNOON. WEAK HIGH PRESSURE RIDGING OF AT LEAST 29.8
INCHES RETURNS TO LAKE SUPERIOR BY TUESDAY.
LSZ162-282000-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
400 AM EDT FRI AUG 28 2026 /300 AM CDT FRI AUG 28 2026/
EARLY THIS MORNING
NORTHEAST WINDS 5 TO 15 KNOTS. PATCHY FOG.
WAVES CALM TO 2 FEET.
TODAY
NORTHEAST WINDS LESS THAN 10 KNOTS BECOMING EAST 5 TO
15 KNOTS IN THE AFTERNOON, THEN VEERING SOUTHEAST LATE. WAVES
CALM TO 2 FEET.
TONIGHT
SOUTHEAST WINDS 5 TO 15 KNOTS BECOMING NORTHEAST LESS
THAN 10 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
SATURDAY
EAST WINDS 5 TO 15 KNOTS. A CHANCE OF SHOWERS. WAVES
CALM TO 2 FEET.
SATURDAY NIGHT
EAST WINDS 5 TO 15 KNOTS. A SLIGHT CHANCE OF
SHOWERS THROUGH MIDNIGHT. WAVES CALM TO 2 FEET.
SUNDAY
NORTHEAST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS BY MID AFTERNOON. WAVES BUILDING TO 1 TO 3 FEET.
SUNDAY NIGHT
NORTHEAST WINDS 15 TO 25 KNOTS DIMINISHING TO
10 TO 20 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS. WAVES 1 TO
3 FEET.
MONDAY
NORTHEAST WINDS 10 TO 20 KNOTS BECOMING WEST 5 TO
15 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET.
TUESDAY
SOUTHWEST WINDS 15 TO 25 KNOTS BECOMING WEST 5 TO
15 KNOTS. WAVES BUILDING TO 1 TO 3 FEET, THEN SUBSIDING TO CALM
TO 2 FEET.
LSZ263-282000-
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 FRI AUG 28 2026
EARLY THIS MORNING
NORTHEAST WINDS LESS THAN 10 KNOTS. WAVES
CALM TO 2 FEET.
TODAY
NORTHEAST WINDS LESS THAN 10 KNOTS INCREASING TO 5 TO
15 KNOTS IN THE AFTERNOON, THEN VEERING SOUTH LATE. WAVES CALM TO
2 FEET.
TONIGHT
SOUTH WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
SATURDAY
SOUTH WINDS 5 TO 15 KNOTS BACKING SOUTHEAST LATE. A
CHANCE OF SHOWERS. WAVES CALM TO 2 FEET.
SATURDAY NIGHT
SOUTH WINDS 5 TO 15 KNOTS BACKING SOUTHEAST
AFTER MIDNIGHT. A SLIGHT CHANCE OF SHOWERS. WAVES CALM TO 2 FEET.
SUNDAY
EAST WINDS 5 TO 15 KNOTS BECOMING NORTHEAST 10 TO
20 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
SUNDAY NIGHT
EAST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS. WAVES BUILDING TO
1 TO 3 FEET, THEN SUBSIDING TO CALM TO 2 FEET.
MONDAY
EAST WINDS 5 TO 15 KNOTS VEERING WEST. WAVES BUILDING
TO 1 TO 3 FEET, THEN SUBSIDING TO CALM TO 2 FEET.
TUESDAY
SOUTHWEST WINDS 15 TO 25 KNOTS BECOMING WEST 10 TO
20 KNOTS. WAVES BUILDING TO 1 TO 3 FEET, THEN SUBSIDING TO CALM
TO 2 FEET.
LSZ264-282000-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
400 AM EDT FRI AUG 28 2026
EARLY THIS MORNING
NORTHWEST WINDS LESS THAN 10 KNOTS. WAVES
CALM TO 2 FEET.
TODAY
NORTHWEST WINDS LESS THAN 10 KNOTS BACKING WEST IN THE
AFTERNOON, THEN BECOMING SOUTH 5 TO 15 KNOTS LATE. WAVES CALM TO
2 FEET.
TONIGHT
SOUTH WINDS 5 TO 15 KNOTS DIMINISHING TO LESS THAN
10 KNOTS LATE. WAVES CALM TO 2 FEET.
SATURDAY
SOUTH WINDS 5 TO 15 KNOTS DIMINISHING TO LESS THAN
10 KNOTS IN THE AFTERNOON, THEN BECOMING SOUTHEAST 5 TO 15 KNOTS
LATE. A SLIGHT CHANCE OF SHOWERS BY MID AFTERNOON. WAVES CALM TO
2 FEET.
SATURDAY NIGHT
SOUTH WINDS 5 TO 15 KNOTS BACKING SOUTHEAST
AFTER MIDNIGHT. A SLIGHT CHANCE OF SHOWERS THROUGH MIDNIGHT.
WAVES CALM TO 2 FEET.
SUNDAY
EAST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
SUNDAY NIGHT
EAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS. WAVES BUILDING TO
1 TO 3 FEET.
MONDAY
SOUTHEAST WINDS 15 TO 25 KNOTS BECOMING WEST 5 TO
15 KNOTS. A CHANCE OF SHOWERS. WAVES BUILDING TO 2 TO 4 FEET,
THEN SUBSIDING TO CALM TO 2 FEET.
TUESDAY
SOUTHWEST WINDS 15 TO 25 KNOTS BECOMING WEST 10 TO
20 KNOTS. WAVES BUILDING TO 1 TO 3 FEET, THEN SUBSIDING TO CALM
TO 2 FEET.
LSZ265-282000-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
400 AM EDT FRI AUG 28 2026
EARLY THIS MORNING
NORTH WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
TODAY
WEST WINDS 5 TO 15 KNOTS BACKING EAST IN THE AFTERNOON.
WAVES CALM TO 2 FEET.
TONIGHT
SOUTHEAST WINDS 10 TO 20 KNOTS BECOMING SOUTH 5 TO
15 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
SATURDAY
SOUTH WINDS 5 TO 15 KNOTS BACKING SOUTHEAST IN THE
AFTERNOON, THEN INCREASING TO 10 TO 20 KNOTS LATE. A CHANCE OF
SHOWERS AND A SLIGHT CHANCE OF THUNDERSTORMS BY MID AFTERNOON.
WAVES CALM TO 2 FEET.
SATURDAY NIGHT
SOUTH WINDS 10 TO 20 KNOTS. A SLIGHT CHANCE OF
SHOWERS THROUGH MIDNIGHT. WAVES CALM TO 2 FEET.
SUNDAY
SOUTHEAST WINDS 10 TO 20 KNOTS BECOMING EAST 15 TO
25 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
SUNDAY NIGHT
EAST WINDS 15 TO 25 KNOTS BECOMING SOUTHEAST
10 TO 20 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS. WAVES
BUILDING TO 1 TO 3 FEET.
MONDAY
SOUTHEAST WINDS 15 TO 25 KNOTS BECOMING WEST 10 TO
20 KNOTS. A CHANCE OF SHOWERS. WAVES BUILDING TO 2 TO 4 FEET,
THEN SUBSIDING TO CALM TO 2 FEET.
TUESDAY
WEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS. WAVES CALM TO 2 FEET.
LSZ266-282000-
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 FRI AUG 28 2026
EARLY THIS MORNING
NORTHWEST WINDS 5 TO 15 KNOTS. AREAS OF
DENSE FOG. WAVES CALM TO 2 FEET.
TODAY
WEST WINDS 5 TO 15 KNOTS BACKING EAST LATE. PATCHY DENSE
FOG THROUGH EARLY AFTERNOON. WAVES CALM TO 2 FEET.
TONIGHT
SOUTH WINDS 5 TO 15 KNOTS INCREASING TO 10 TO 20 KNOTS
AFTER MIDNIGHT, THEN DIMINISHING TO 5 TO 15 KNOTS LATE. WAVES
CALM TO 2 FEET.
SATURDAY
SOUTH WINDS 5 TO 15 KNOTS. A SLIGHT CHANCE OF SHOWERS
AND THUNDERSTORMS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
SATURDAY NIGHT
SOUTH WINDS 10 TO 20 KNOTS. A SLIGHT CHANCE OF
THUNDERSTORMS THROUGH MIDNIGHT. A SLIGHT CHANCE OF SHOWERS. WAVES
CALM TO 2 FEET.
SUNDAY
SOUTHEAST WINDS 10 TO 20 KNOTS BACKING EAST BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
SUNDAY NIGHT
EAST WINDS 10 TO 20 KNOTS VEERING SOUTHEAST AFTER
MIDNIGHT. A CHANCE OF SHOWERS. WAVES BUILDING TO 1 TO 3 FEET.
MONDAY
SOUTHEAST WINDS 15 TO 25 KNOTS BECOMING SOUTH 10 TO
20 KNOTS. A CHANCE OF SHOWERS. WAVES BUILDING TO 2 TO 4 FEET,
THEN SUBSIDING TO CALM TO 2 FEET.
TUESDAY
WEST WINDS 10 TO 20 KNOTS. WAVES CALM TO 2 FEET.
LSZ267-282000-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
400 AM EDT FRI AUG 28 2026
EARLY THIS MORNING
NORTHWEST WINDS 5 TO 15 KNOTS. AREAS OF
DENSE FOG. WAVES CALM TO 2 FEET.
TODAY
WEST WINDS 5 TO 15 KNOTS. PATCHY FOG THROUGH EARLY
AFTERNOON. WAVES CALM TO 2 FEET.
TONIGHT
SOUTH WINDS LESS THAN 10 KNOTS INCREASING TO 10 TO
20 KNOTS. WAVES CALM TO 2 FEET.
SATURDAY
SOUTH WINDS 5 TO 15 KNOTS BACKING SOUTHEAST LATE. A
SLIGHT CHANCE OF SHOWERS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
SATURDAY NIGHT
SOUTH WINDS 5 TO 15 KNOTS BECOMING SOUTHWEST
10 TO 20 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS AND A SLIGHT
CHANCE OF THUNDERSTORMS. WAVES CALM TO 2 FEET.
SUNDAY
SOUTHEAST WINDS 10 TO 20 KNOTS BACKING EAST BY MID
AFTERNOON. A CHANCE OF SHOWERS. WAVES CALM TO 2 FEET.
SUNDAY NIGHT
EAST WINDS 10 TO 20 KNOTS VEERING SOUTHEAST AFTER
MIDNIGHT. A CHANCE OF SHOWERS. WAVES CALM TO 2 FEET.
MONDAY
SOUTHEAST WINDS 15 TO 25 KNOTS BECOMING SOUTH 10 TO
20 KNOTS. A CHANCE OF SHOWERS. WAVES BUILDING TO 1 TO 3 FEET,
THEN SUBSIDING TO CALM TO 2 FEET.
TUESDAY
WEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
LSZ261-281400-
MAFOR 2809/
SUPERIOR WEST 13100 14300 11300. WAVES 1 FOOT OR LESS.
SUPERIOR NORTH CENTRAL 12700 11600 11500 14400. WAVES 1 FOOT OR
LESS.
SUPERIOR SOUTH CENTRAL 11800 11600 11500 12200 11310 12410. WAVES
1 FOOT OR LESS.
SUPERIOR EAST 11704 11604 12600 11500 13400. WAVES 1 FOOT OR
LESS.
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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