408
FZUS63 KMQT 050201
GLFLS
OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
1001 PM EDT FRI SEP 4 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
HIGH PRESSURE RIDGING BUILDS TO 30.1 INCHES OVER LAKE SUPERIOR BY
TOMORROW AFTERNOON, REMAINING THROUGH SUNDAY NIGHT. THE RIDGE
BRIEFLY BUILDS FURTHER TO 30.2 INCHES ON MONDAY AS A 30.4 INCH HIGH
PASSES EASTWARD OVER FAR NORTHERN ONTARIO. MEANWHILE, A 29.6 INCH
LOW DEVELOPS OFF THE NORTHERN ROCKIES. THE LOW THEN TRACKS NORTHEAST
TO JAMES BAY, DEEPENING TO 29.3 INCHES BY WEDNESDAY AFTERNOON. THIS
SENDS A 29.7 INCH TROUGH OVER LAKE SUPERIOR TUESDAY NIGHT AND
WEDNESDAY.
LSZ162-050800-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
1001 PM EDT FRI SEP 4 2026 /901 PM CDT FRI SEP 4 2026/
REST OF TONIGHT
NORTHEAST WINDS 15 TO 25 KNOTS DIMINISHING TO
10 TO 20 KNOTS AFTER MIDNIGHT. PATCHY FOG AFTER MIDNIGHT. WAVES
3 TO 5 FEET OCCASIONALLY TO 7 FEET SUBSIDING TO 1 TO 3 FEET.
SATURDAY
NORTHEAST WINDS 10 TO 20 KNOTS. PATCHY FOG THROUGH
EARLY AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
SATURDAY NIGHT
NORTHEAST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
SUNDAY
EAST WINDS 5 TO 15 KNOTS BACKING NORTHEAST BY MID
AFTERNOON. A SLIGHT CHANCE OF SHOWERS BY MID AFTERNOON. WAVES
CALM TO 2 FEET.
SUNDAY NIGHT
NORTHEAST WINDS 5 TO 15 KNOTS. A SLIGHT CHANCE OF
SHOWERS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
MONDAY
EAST WINDS 10 TO 20 KNOTS INCREASING TO GALES TO
35 KNOTS BY MID AFTERNOON. A CHANCE OF SHOWERS. WAVES BUILDING TO
1 TO 3 FEET.
MONDAY NIGHT
EAST GALES TO 35 KNOTS BECOMING SOUTHEAST 20 TO
30 KNOTS AFTER MIDNIGHT. SHOWERS. WAVES BUILDING TO 3 TO 6 FEET
OCCASIONALLY TO 8 FEET.
TUESDAY
SOUTH WINDS 20 TO 30 KNOTS VEERING WEST. A CHANCE OF
SHOWERS AND THUNDERSTORMS. WAVES SUBSIDING TO 2 TO 4 FEET, THEN
BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
WEDNESDAY
WEST GALES TO 40 KNOTS BECOMING NORTHWEST 20 TO
30 KNOTS. WAVES BUILDING TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET,
THEN SUBSIDING TO CALM TO 2 FEET.
LSZ263-050800-
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-
1001 PM EDT FRI SEP 4 2026
REST OF TONIGHT
NORTHEAST WINDS 10 TO 20 KNOTS DIMINISHING TO
5 TO 15 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF SHOWERS BY
MIDNIGHT. PATCHY FOG AFTER MIDNIGHT. WAVES 3 TO 5 FEET
OCCASIONALLY TO 7 FEET SUBSIDING TO CALM TO 2 FEET.
SATURDAY
NORTHEAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS LATE. WAVES CALM TO 2 FEET.
SATURDAY NIGHT
EAST WINDS 5 TO 15 KNOTS BECOMING SOUTHEAST
LESS THAN 10 KNOTS LATE. WAVES CALM TO 2 FEET.
SUNDAY
SOUTHEAST WINDS LESS THAN 10 KNOTS BECOMING EAST 5 TO
15 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
SUNDAY NIGHT
EAST WINDS 5 TO 15 KNOTS BECOMING SOUTH 10 TO
20 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF SHOWERS AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
MONDAY
EAST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO 25 KNOTS
BY MID AFTERNOON. A CHANCE OF SHOWERS. WAVES BUILDING TO 1 TO
3 FEET.
MONDAY NIGHT
EAST WINDS 20 TO 30 KNOTS BECOMING SOUTHEAST
GALES TO 35 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS THROUGH
MIDNIGHT, THEN SHOWERS LIKELY AFTER MIDNIGHT. WAVES BUILDING TO
3 TO 6 FEET OCCASIONALLY TO 8 FEET.
TUESDAY
SOUTH GALES TO 35 KNOTS VEERING SOUTHWEST. SHOWERS. A
CHANCE OF SHOWERS. WAVES SUBSIDING TO 2 TO 4 FEET, THEN BUILDING
TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
WEDNESDAY
WEST GALES TO 40 KNOTS VEERING NORTHWEST. WAVES
BUILDING TO 6 TO 9 FEET OCCASIONALLY TO 11 FEET, THEN SUBSIDING
TO 2 TO 4 FEET.
LSZ264-050800-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
1001 PM EDT FRI SEP 4 2026
REST OF TONIGHT
NORTHEAST WINDS 5 TO 15 KNOTS. 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 BECOMING SOUTHEAST
LESS THAN 10 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
SUNDAY
SOUTHEAST WINDS LESS THAN 10 KNOTS INCREASING TO 5 TO
15 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
SUNDAY NIGHT
SOUTHEAST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
MONDAY
EAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO 20 KNOTS
BY MID AFTERNOON. WAVES CALM TO 2 FEET.
MONDAY NIGHT
EAST WINDS 15 TO 25 KNOTS BECOMING SOUTHEAST
20 TO 30 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS THROUGH
MIDNIGHT, THEN SHOWERS LIKELY AFTER MIDNIGHT. WAVES BUILDING TO
3 TO 6 FEET OCCASIONALLY TO 8 FEET.
TUESDAY
SOUTH GALES TO 40 KNOTS. SHOWERS. A CHANCE OF SHOWERS.
WAVES BUILDING TO 6 TO 9 FEET OCCASIONALLY TO 11 FEET, THEN
SUBSIDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
WEDNESDAY
WEST GALES TO 45 KNOTS BECOMING NORTHWEST GALES TO
40 KNOTS. WAVES BUILDING TO 7 TO 10 FEET OCCASIONALLY TO 13 FEET,
THEN SUBSIDING TO 2 TO 4 FEET.
LSZ265-050800-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
1001 PM EDT FRI SEP 4 2026
REST OF TONIGHT
EAST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS AFTER MIDNIGHT, THEN BACKING NORTHEAST LATE. A SLIGHT
CHANCE OF SHOWERS. WAVES CALM TO 2 FEET.
SATURDAY
EAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO 20 KNOTS
IN THE AFTERNOON, THEN DIMINISHING TO 5 TO 15 KNOTS LATE. 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 10 TO
20 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
SUNDAY NIGHT
SOUTHEAST WINDS 10 TO 20 KNOTS VEERING SOUTH
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
MONDAY
SOUTH WINDS 5 TO 15 KNOTS BECOMING EAST 10 TO 20 KNOTS
BY MID AFTERNOON. WAVES CALM TO 2 FEET.
MONDAY NIGHT
SOUTHEAST WINDS 20 TO 30 KNOTS. A CHANCE OF
SHOWERS. WAVES BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
TUESDAY
SOUTH GALES TO 40 KNOTS DIMINISHING TO 20 TO 30 KNOTS.
SHOWERS. A CHANCE OF SHOWERS. WAVES BUILDING TO 6 TO 9 FEET
OCCASIONALLY TO 11 FEET, THEN SUBSIDING TO 2 TO 4 FEET.
WEDNESDAY
WEST GALES TO 45 KNOTS BECOMING NORTHWEST GALES TO
40 KNOTS. WAVES BUILDING TO 6 TO 9 FEET OCCASIONALLY TO 11 FEET,
THEN SUBSIDING TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET.
LSZ266-050800-
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-
1001 PM EDT FRI SEP 4 2026
REST OF TONIGHT
NORTHEAST WINDS 10 TO 20 KNOTS DIMINISHING TO
5 TO 15 KNOTS AFTER MIDNIGHT, THEN VEERING EAST LATE. A SLIGHT
CHANCE OF SHOWERS BY MIDNIGHT. WAVES CALM TO 2 FEET.
SATURDAY
EAST WINDS 5 TO 15 KNOTS BACKING NORTHEAST LATE.
WAVES CALM TO 2 FEET.
SATURDAY NIGHT
NORTH WINDS 5 TO 15 KNOTS VEERING EAST LATE.
WAVES CALM TO 2 FEET.
SUNDAY
SOUTHEAST WINDS 5 TO 15 KNOTS BACKING EAST BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
SUNDAY NIGHT
SOUTHEAST WINDS 5 TO 15 KNOTS VEERING SOUTH AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
MONDAY
SOUTH WINDS 5 TO 15 KNOTS BECOMING EAST 10 TO 20 KNOTS
BY MID AFTERNOON. WAVES CALM TO 2 FEET.
MONDAY NIGHT
SOUTHEAST WINDS 15 TO 25 KNOTS INCREASING TO
20 TO 30 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS. WAVES
BUILDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
TUESDAY
SOUTH GALES TO 40 KNOTS. SHOWERS. A CHANCE OF SHOWERS.
WAVES BUILDING TO 6 TO 9 FEET OCCASIONALLY TO 11 FEET, THEN
SUBSIDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
WEDNESDAY
WEST GALES TO 40 KNOTS VEERING NORTHWEST. WAVES
BUILDING TO 7 TO 10 FEET OCCASIONALLY TO 13 FEET, THEN SUBSIDING
TO 5 TO 8 FEET OCCASIONALLY TO 10 FEET.
LSZ267-050800-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
1001 PM EDT FRI SEP 4 2026
REST OF TONIGHT
NORTHEAST WINDS 5 TO 15 KNOTS BECOMING EAST
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
SATURDAY
EAST WINDS 5 TO 15 KNOTS BACKING NORTH LATE. WAVES
CALM TO 2 FEET.
SATURDAY NIGHT
NORTH WINDS 5 TO 15 KNOTS VEERING NORTHEAST
AFTER MIDNIGHT, THEN VEERING SOUTHEAST LATE. WAVES CALM TO
2 FEET.
SUNDAY
SOUTHEAST WINDS 5 TO 15 KNOTS BACKING EAST BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
SUNDAY NIGHT
SOUTHEAST WINDS 5 TO 15 KNOTS VEERING SOUTH AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
MONDAY
SOUTHEAST WINDS 5 TO 15 KNOTS BACKING EAST BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
MONDAY NIGHT
SOUTHEAST WINDS 10 TO 20 KNOTS INCREASING TO
15 TO 25 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS AFTER
MIDNIGHT. WAVES BUILDING TO 2 TO 4 FEET.
TUESDAY
SOUTHEAST WINDS 20 TO 30 KNOTS VEERING SOUTH. SHOWERS.
WAVES BUILDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
WEDNESDAY
WEST GALES TO 35 KNOTS VEERING NORTHWEST. WAVES
BUILDING TO 6 TO 10 FEET OCCASIONALLY TO 13 FEET.
LSZ261-050800-
MAFOR 0503/
SUPERIOR WEST 12120 15110. WAVES 3 TO 5 FEET SUBSIDING TO 2 TO 4
FEET OVERNIGHT. WAVES 1 TO 3 FEET SATURDAY AND SATURDAY EVENING.
SUPERIOR NORTH CENTRAL 14100 13200 11300. WAVES 2 FEET OR LESS.
SUPERIOR SOUTH CENTRAL 11210 11100 11110 13210 11110 11200. WAVES
1 TO 2 FEET.
SUPERIOR EAST 11100 13210 12100 12800. WAVES 2 FEET 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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