700
FZUS63 KMQT 260201
GLFLS
OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
1000 PM EDT THU JUN 25 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
THIS EVENING, A 30.0 INCH HIGH IS OVER LAKE SUPERIOR WHILE A 29.9
INCH LOW IS OVER SOUTHERN ONTARIO. AS THE LOW DEPARTS EAST, THE HIGH
BUILDS TO 30.1 INCHES FRIDAY AND SATURDAY. MEANWHILE, BROAD LOW
PRESSURE OF AT LEAST 29.5 INCHES DEEPENS IN THE HIGH PLAINS. BY
SUNDAY AFTERNOON, THE HIGH WILL LIFT TO JAMES BAY BUT KEEP 30.0 INCH
RIDGING OVER THE UPPER GREAT LAKES WHILE LOW PRESSURE REMAINS OVER
THE PLAINS. HIGH PRESSURE THEN SHIFTS OVER LAKE ERIE BY MONDAY
MORNING AS 29.5 INCH LOW PRESSURE CONSOLIDATES OVER SOUTH DAKOTA.
THROUGH MONDAY AND TUESDAY, THIS LOW SLIDES NORTH TO LAKE WINNIPEG
AT AROUND 29.4 INCHES WHILE THE 30.1 INCH HIGH SHIFTS OFF THE EAST
COAST. A LOBE OF THE LOW PRESSURE THEN MOVES ACROSS NORTHERN ONTARIO
WEDNESDAY AT AROUND 29.7 INCHES, OPPOSING 30.0 INCH HIGH PRESSURE
OVER THE US SOUTHEAST.
LSZ162-260800-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
1000 PM EDT THU JUN 25 2026 /900 PM CDT THU JUN 25 2026/
REST OF TONIGHT
NORTH WINDS LESS THAN 10 KNOTS. PATCHY FOG
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
FRIDAY
NORTH WINDS LESS THAN 10 KNOTS INCREASING TO 5 TO
15 KNOTS IN THE AFTERNOON, THEN VEERING NORTHEAST LATE. WAVES
CALM TO 2 FEET.
FRIDAY NIGHT
EAST WINDS 5 TO 15 KNOTS BACKING NORTHEAST AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
SATURDAY
EAST WINDS 5 TO 15 KNOTS BECOMING NORTHEAST 10 TO
20 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
SATURDAY NIGHT
NORTHEAST WINDS 10 TO 20 KNOTS DIMINISHING TO
5 TO 15 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF SHOWERS AFTER
MIDNIGHT. WAVES BUILDING TO 1 TO 3 FEET, THEN SUBSIDING TO CALM
TO 2 FEET.
SUNDAY
EAST WINDS 10 TO 20 KNOTS BECOMING NORTHEAST 15 TO
25 KNOTS BY MID AFTERNOON. A CHANCE OF SHOWERS. WAVES BUILDING TO
2 TO 4 FEET.
SUNDAY NIGHT
EAST WINDS 20 TO 30 KNOTS DIMINISHING TO 10 TO
20 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS THROUGH MIDNIGHT. A
CHANCE OF THUNDERSTORMS. SHOWERS LIKELY AFTER MIDNIGHT. WAVES
BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET, THEN SUBSIDING TO
2 TO 4 FEET.
MONDAY
EAST WINDS 10 TO 20 KNOTS BACKING NORTHEAST. A CHANCE
OF SHOWERS AND THUNDERSTORMS. WAVES SUBSIDING TO CALM TO 2 FEET.
TUESDAY
SOUTHWEST WINDS 5 TO 15 KNOTS VEERING NORTH. A CHANCE
OF THUNDERSTORMS. SHOWERS LIKELY. WAVES CALM TO 2 FEET.
LSZ263-260800-
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-
1000 PM EDT THU JUN 25 2026
REST OF TONIGHT
SOUTHWEST WINDS LESS THAN 10 KNOTS. PATCHY
DENSE FOG AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
FRIDAY
SOUTHWEST WINDS LESS THAN 10 KNOTS INCREASING TO 5 TO
15 KNOTS IN THE AFTERNOON, THEN BACKING NORTHEAST LATE. WAVES
CALM TO 2 FEET.
FRIDAY NIGHT
EAST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
SATURDAY
EAST WINDS 5 TO 15 KNOTS BECOMING NORTHEAST 10 TO
20 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
SATURDAY NIGHT
EAST WINDS 10 TO 20 KNOTS BECOMING SOUTHEAST
5 TO 15 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 1 TO 3 FEET, THEN
SUBSIDING TO CALM TO 2 FEET.
SUNDAY
EAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO 20 KNOTS
BY MID AFTERNOON. WAVES BUILDING TO 2 TO 4 FEET.
SUNDAY NIGHT
SOUTHEAST WINDS 15 TO 25 KNOTS. A CHANCE OF
SHOWERS. WAVES BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET,
THEN SUBSIDING TO 2 TO 4 FEET.
MONDAY
EAST WINDS 15 TO 25 KNOTS BECOMING SOUTH 10 TO
20 KNOTS. A CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES BUILDING
TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET, THEN SUBSIDING TO 1 TO
3 FEET.
TUESDAY
SOUTHWEST WINDS 5 TO 15 KNOTS. A CHANCE OF
THUNDERSTORMS. SHOWERS LIKELY. WAVES SUBSIDING TO CALM TO 2 FEET.
LSZ264-260800-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
1000 PM EDT THU JUN 25 2026
REST OF TONIGHT
WEST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
FRIDAY
WEST WINDS LESS THAN 10 KNOTS BACKING SOUTHWEST IN THE
AFTERNOON. WAVES CALM TO 2 FEET.
FRIDAY NIGHT
EAST WINDS LESS THAN 10 KNOTS VEERING SOUTHEAST
AFTER MIDNIGHT, THEN BACKING EAST LATE. WAVES CALM TO 2 FEET.
SATURDAY
EAST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
SATURDAY NIGHT
EAST WINDS 5 TO 15 KNOTS VEERING SOUTHEAST
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
SUNDAY
SOUTHEAST WINDS 5 TO 15 KNOTS BECOMING EAST 15 TO
25 KNOTS BY MID AFTERNOON. WAVES BUILDING TO 2 TO 4 FEET.
SUNDAY NIGHT
SOUTHEAST WINDS 15 TO 25 KNOTS. A CHANCE OF
SHOWERS. WAVES BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
MONDAY
SOUTHEAST WINDS 15 TO 25 KNOTS BECOMING SOUTH 10 TO
20 KNOTS. SHOWERS LIKELY. WAVES BUILDING TO 4 TO 7 FEET
OCCASIONALLY TO 9 FEET, THEN SUBSIDING TO 2 TO 4 FEET.
TUESDAY
SOUTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTH. A CHANCE
OF SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET.
LSZ265-260800-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
1000 PM EDT THU JUN 25 2026
REST OF TONIGHT
NORTHWEST WINDS 5 TO 15 KNOTS BACKING WEST
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
FRIDAY
WEST WINDS 5 TO 15 KNOTS BACKING EAST IN THE AFTERNOON.
WAVES CALM TO 2 FEET.
FRIDAY NIGHT
EAST WINDS 5 TO 15 KNOTS VEERING SOUTHEAST AFTER
MIDNIGHT, THEN VEERING WEST LATE. WAVES CALM TO 2 FEET.
SATURDAY
EAST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
SATURDAY NIGHT
SOUTHEAST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
SUNDAY
SOUTHEAST WINDS 15 TO 25 KNOTS BECOMING EAST 20 TO
30 KNOTS BY MID AFTERNOON. WAVES BUILDING TO 3 TO 5 FEET
OCCASIONALLY TO 7 FEET.
SUNDAY NIGHT
SOUTHEAST WINDS 20 TO 30 KNOTS. A CHANCE OF
SHOWERS. WAVES 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
MONDAY
SOUTHEAST WINDS 20 TO 30 KNOTS BECOMING SOUTH 15 TO
25 KNOTS. A CHANCE OF SHOWERS. WAVES BUILDING TO 4 TO 7 FEET
OCCASIONALLY TO 9 FEET, THEN SUBSIDING TO 1 TO 3 FEET.
TUESDAY
SOUTHWEST WINDS 10 TO 20 KNOTS BACKING SOUTH. A CHANCE
OF SHOWERS. SHOWERS LIKELY. WAVES SUBSIDING TO CALM TO 2 FEET.
LSZ266-260800-
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-
1000 PM EDT THU JUN 25 2026
REST OF TONIGHT
NORTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
FRIDAY
NORTHWEST WINDS 5 TO 15 KNOTS BACKING WEST IN THE
AFTERNOON, THEN VEERING NORTHWEST LATE. WAVES CALM TO 2 FEET.
FRIDAY NIGHT
EAST WINDS 5 TO 15 KNOTS VEERING WEST AFTER
MIDNIGHT, THEN VEERING NORTHWEST LATE. WAVES CALM TO 2 FEET.
SATURDAY
NORTH WINDS 5 TO 15 KNOTS VEERING EAST BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
SATURDAY NIGHT
EAST WINDS 5 TO 15 KNOTS VEERING SOUTHEAST
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
SUNDAY
SOUTHEAST WINDS 10 TO 20 KNOTS BECOMING EAST 15 TO
25 KNOTS BY MID AFTERNOON. WAVES BUILDING TO 2 TO 4 FEET.
SUNDAY NIGHT
SOUTHEAST WINDS 15 TO 25 KNOTS INCREASING TO
20 TO 30 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS. WAVES
BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
MONDAY
SOUTHEAST WINDS 20 TO 30 KNOTS BECOMING SOUTH 15 TO
25 KNOTS. A CHANCE OF SHOWERS. WAVES BUILDING TO 4 TO 7 FEET
OCCASIONALLY TO 9 FEET, THEN SUBSIDING TO 2 TO 4 FEET.
TUESDAY
SOUTH WINDS 10 TO 20 KNOTS. A CHANCE OF SHOWERS. WAVES
SUBSIDING TO CALM TO 2 FEET.
LSZ267-260800-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
1000 PM EDT THU JUN 25 2026
REST OF TONIGHT
NORTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
FRIDAY
NORTHWEST WINDS 5 TO 15 KNOTS BACKING WEST IN THE
AFTERNOON, THEN VEERING NORTHWEST LATE. WAVES CALM TO 2 FEET.
FRIDAY NIGHT
WEST WINDS 5 TO 15 KNOTS VEERING NORTHWEST AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
SATURDAY
NORTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
SATURDAY NIGHT
EAST WINDS 5 TO 15 KNOTS VEERING SOUTHEAST
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
SUNDAY
EAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO 20 KNOTS
BY MID AFTERNOON. WAVES CALM TO 2 FEET.
SUNDAY NIGHT
SOUTHEAST WINDS 15 TO 25 KNOTS. A CHANCE OF
SHOWERS AFTER MIDNIGHT. WAVES BUILDING TO 2 TO 4 FEET.
MONDAY
SOUTHEAST WINDS 15 TO 25 KNOTS VEERING SOUTH. A CHANCE
OF SHOWERS. WAVES BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET,
THEN SUBSIDING TO 2 TO 4 FEET.
TUESDAY
SOUTH WINDS 10 TO 20 KNOTS BACKING SOUTHEAST. A CHANCE
OF SHOWERS. WAVES SUBSIDING TO CALM TO 2 FEET.
LSZ261-260800-
MAFOR 2603/
SUPERIOR WEST 11600 11500 11600 11700 11500 11800 11100 11210.
WAVES 1 FOOT OR LESS.
SUPERIOR NORTH CENTRAL 15600 11500 11200. WAVES 1 FOOT OR LESS.
SUPERIOR SOUTH CENTRAL 13600 11700 11100 13200. WAVES 1 FOOT OR
LESS.
SUPERIOR EAST 14700 11700 11600 11700 11800. 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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