376
FZUS63 KMQT 222143
GLFLS
OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
543 PM EDT THU OCT 22 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 30.3 INCH HIGH PRESSURE OVER QUEBEC, EXTENDING A 30.2 INCH RIDGE
OVER LAKE SUPERIOR, WILL BUILD TO 30.5 INCHES THROUGH FRIDAY NIGHT.
BY SATURDAY AFTERNOON, THE HIGH SHIFTS SOUTHEAST INTO NEW ENGLAND AS
A 29.6 INCH LOW LIFTS NORTH OF LAKE WINNIPEG INTO NORTHERN MANITOBA,
STRENGTHENING TO 29.2 INCHES BY SATURDAY EVENING. THE LOW THEN LIFTS
NORTHEAST TO THE HUDSON BAY SATURDAY NIGHT THROUGH SUNDAY AS IT
DRAGS A 30.2 INCH TROUGH ACROSS LAKE SUPERIOR. HIGH PRESSURE OF AT
LEAST 30.6 INCHES OVER THE CANADIAN PRAIRIES ON MONDAY PUSHES
RIDGING OF AT LEAST 30.4 INCHES OVER THE UPPER GREAT LAKES EARLY
NEXT WEEK.
LSZ162-230545-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
543 PM EDT THU OCT 22 2026 /443 PM CDT THU OCT 22 2026/
...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM EDT /10 AM CDT/
FRIDAY...
LATE THIS AFTERNOON
EAST WINDS 5 TO 15 KNOTS. PATCHY DENSE
FOG. WAVES CALM TO 2 FEET.
TONIGHT
NORTHEAST WINDS 5 TO 15 KNOTS VEERING EAST LATE. AREAS
OF DENSE FOG. WAVES CALM TO 2 FEET.
FRIDAY
EAST WINDS 5 TO 15 KNOTS. PATCHY DENSE FOG. WAVES CALM
TO 2 FEET.
FRIDAY NIGHT
EAST WINDS 5 TO 15 KNOTS VEERING SOUTH AFTER
MIDNIGHT, THEN INCREASING TO 10 TO 20 KNOTS LATE. PATCHY FOG
THROUGH MIDNIGHT. WAVES BUILDING TO 1 TO 3 FEET.
SATURDAY
SOUTH WINDS 15 TO 25 KNOTS VEERING SOUTHWEST BY MID
AFTERNOON. A CHANCE OF SHOWERS. WAVES BUILDING TO 2 TO 4 FEET.
SATURDAY NIGHT
WEST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO
CALM TO 2 FEET.
SUNDAY
WEST WINDS 10 TO 20 KNOTS. WAVES BUILDING TO 1 TO
3 FEET, THEN SUBSIDING TO CALM TO 2 FEET.
SUNDAY NIGHT
NORTHWEST WINDS 10 TO 20 KNOTS VEERING NORTH
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
MONDAY
NORTHEAST WINDS 5 TO 15 KNOTS VEERING EAST. WAVES CALM
TO 2 FEET.
TUESDAY
EAST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS. WAVES CALM TO 2 FEET.
LSZ263-230545-
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-
543 PM EDT THU OCT 22 2026
..DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM EDT FRIDAY
LATE THIS AFTERNOON
EAST WINDS 5 TO 15 KNOTS. PATCHY DENSE
FOG. WAVES CALM TO 2 FEET.
TONIGHT
EAST WINDS 5 TO 15 KNOTS VEERING SOUTH LATE. PATCHY
DENSE FOG. WAVES CALM TO 2 FEET.
FRIDAY
SOUTH WINDS 5 TO 15 KNOTS DIMINISHING TO LESS THAN
10 KNOTS IN THE AFTERNOON, THEN BECOMING EAST 5 TO 15 KNOTS LATE.
PATCHY DENSE FOG. WAVES CALM TO 2 FEET.
FRIDAY NIGHT
SOUTHEAST WINDS 5 TO 15 KNOTS BECOMING SOUTH
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 2 TO 4 FEET.
SATURDAY
SOUTH WINDS 15 TO 25 KNOTS. A SLIGHT CHANCE OF
SHOWERS BY MID AFTERNOON. WAVES BUILDING TO 3 TO 5 FEET
OCCASIONALLY TO 7 FEET, THEN SUBSIDING TO 2 TO 4 FEET.
SATURDAY NIGHT
SOUTHWEST WINDS 15 TO 25 KNOTS BECOMING WEST
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.
SUNDAY
WEST WINDS 10 TO 20 KNOTS. WAVES BUILDING TO 2 TO
4 FEET.
SUNDAY NIGHT
NORTHWEST WINDS 10 TO 20 KNOTS BECOMING NORTH
5 TO 15 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.
MONDAY
NORTH WINDS 5 TO 15 KNOTS VEERING NORTHEAST. WAVES
SUBSIDING TO CALM TO 2 FEET.
TUESDAY
EAST WINDS 5 TO 15 KNOTS VEERING SOUTH. WAVES CALM TO
2 FEET.
LSZ264-230545-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
543 PM EDT THU OCT 22 2026
..DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM EDT FRIDAY
LATE THIS AFTERNOON
SOUTHEAST WINDS 5 TO 15 KNOTS. PATCHY
DENSE FOG. WAVES CALM TO 2 FEET.
TONIGHT
SOUTHEAST WINDS 5 TO 15 KNOTS VEERING SOUTH LATE.
PATCHY DENSE FOG. WAVES CALM TO 2 FEET.
FRIDAY
SOUTH WINDS 5 TO 15 KNOTS BACKING SOUTHEAST LATE.
PATCHY DENSE FOG THROUGH EARLY AFTERNOON. WAVES CALM TO 2 FEET.
FRIDAY NIGHT
SOUTHEAST WINDS 5 TO 15 KNOTS VEERING SOUTH AFTER
MIDNIGHT, THEN INCREASING TO 10 TO 20 KNOTS LATE. WAVES BUILDING
TO 2 TO 4 FEET.
SATURDAY
SOUTH WINDS 15 TO 25 KNOTS. A SLIGHT CHANCE OF
SHOWERS BY MID AFTERNOON. WAVES BUILDING TO 3 TO 6 FEET
OCCASIONALLY TO 8 FEET.
SATURDAY NIGHT
SOUTHWEST WINDS 15 TO 25 KNOTS BECOMING WEST
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO 2 TO 4 FEET.
SUNDAY
WEST WINDS 15 TO 25 KNOTS. WAVES SUBSIDING TO 1 TO
3 FEET, THEN BUILDING TO 2 TO 4 FEET.
SUNDAY NIGHT
NORTHWEST WINDS 10 TO 20 KNOTS BECOMING NORTH
5 TO 15 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.
MONDAY
NORTH WINDS 5 TO 15 KNOTS VEERING NORTHEAST. WAVES
SUBSIDING TO CALM TO 2 FEET.
TUESDAY
SOUTHEAST WINDS 5 TO 15 KNOTS VEERING SOUTH. WAVES
CALM TO 2 FEET.
LSZ265-230545-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
543 PM EDT THU OCT 22 2026
LATE THIS AFTERNOON
SOUTHEAST WINDS 10 TO 20 KNOTS. WAVES CALM
TO 2 FEET.
TONIGHT
SOUTHEAST WINDS 10 TO 20 KNOTS VEERING SOUTH AFTER
MIDNIGHT, THEN DIMINISHING TO 5 TO 15 KNOTS LATE. PATCHY FOG.
WAVES CALM TO 2 FEET.
FRIDAY
SOUTH WINDS 5 TO 15 KNOTS INCREASING TO 10 TO 20 KNOTS
IN THE AFTERNOON, THEN BACKING SOUTHEAST LATE. PATCHY FOG THROUGH
EARLY AFTERNOON. WAVES BUILDING TO 1 TO 3 FEET.
FRIDAY NIGHT
SOUTH WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS AFTER MIDNIGHT. WAVES 1 TO 3 FEET.
SATURDAY
SOUTH WINDS 20 TO 30 KNOTS. WAVES BUILDING TO 3 TO
6 FEET OCCASIONALLY TO 8 FEET. AREAS
OF DENSE FOG
SATURDAY NIGHT
SOUTH WINDS 20 TO 30 KNOTS BECOMING WEST 15 TO
25 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS. WAVES SUBSIDING TO
1 TO 3 FEET.
SUNDAY
WEST WINDS 15 TO 25 KNOTS. WAVES 1 TO 3 FEET.
SUNDAY NIGHT
NORTHWEST WINDS 15 TO 25 KNOTS VEERING NORTH
AFTER MIDNIGHT. WAVES 1 TO 3 FEET.
MONDAY
NORTH WINDS 10 TO 20 KNOTS VEERING NORTHEAST. WAVES
SUBSIDING TO CALM TO 2 FEET.
TUESDAY
SOUTHEAST WINDS 10 TO 20 KNOTS VEERING SOUTH. WAVES
CALM TO 2 FEET.
LSZ266-230545-
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-
543 PM EDT THU OCT 22 2026
LATE THIS AFTERNOON
EAST WINDS 5 TO 15 KNOTS. PATCHY DENSE
FOG. WAVES CALM TO 2 FEET.
TONIGHT
SOUTHEAST WINDS 5 TO 15 KNOTS BECOMING SOUTH 10 TO
20 KNOTS AFTER MIDNIGHT, THEN INCREASING TO 15 TO 25 KNOTS LATE.
PATCHY FOG. WAVES BUILDING TO 1 TO 3 FEET.
FRIDAY
SOUTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS LATE. PATCHY DENSE FOG THROUGH EARLY AFTERNOON. WAVES
1 TO 3 FEET.
FRIDAY NIGHT
SOUTH WINDS 15 TO 25 KNOTS. WAVES BUILDING TO
2 TO 4 FEET.
SATURDAY
SOUTH WINDS 20 TO 30 KNOTS INCREASING TO GALES TO
35 KNOTS BY MID AFTERNOON. WAVES BUILDING TO 4 TO 7 FEET
OCCASIONALLY TO 9 FEET.
SATURDAY NIGHT
SOUTH GALES TO 35 KNOTS BECOMING SOUTHWEST
15 TO 25 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS. WAVES
SUBSIDING TO 2 TO 4 FEET.
SUNDAY
WEST WINDS 15 TO 25 KNOTS. WAVES 2 TO 4 FEET.
SUNDAY NIGHT
NORTHWEST WINDS 15 TO 25 KNOTS VEERING NORTH
AFTER MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.
MONDAY
NORTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET.
TUESDAY
EAST WINDS 5 TO 15 KNOTS BECOMING SOUTH 10 TO
20 KNOTS. WAVES CALM TO 2 FEET.
LSZ267-230545-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
543 PM EDT THU OCT 22 2026
LATE THIS AFTERNOON
EAST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
TONIGHT
SOUTHEAST WINDS 5 TO 15 KNOTS BECOMING SOUTH 10 TO
20 KNOTS AFTER MIDNIGHT. PATCHY FOG. WAVES CALM TO 2 FEET.
FRIDAY
SOUTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS IN THE AFTERNOON. PATCHY FOG THROUGH EARLY AFTERNOON.
WAVES BUILDING TO 1 TO 3 FEET.
FRIDAY NIGHT
SOUTH WINDS 15 TO 25 KNOTS. WAVES 1 TO 3 FEET.
SATURDAY
SOUTH WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS BY MID AFTERNOON. WAVES BUILDING TO 3 TO 5 FEET
OCCASIONALLY TO 7 FEET.
SATURDAY NIGHT
SOUTH WINDS 20 TO 30 KNOTS BECOMING SOUTHWEST
15 TO 25 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS. WAVES
BUILDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET, THEN SUBSIDING TO
2 TO 4 FEET.
SUNDAY
WEST WINDS 10 TO 20 KNOTS. WAVES 2 TO 4 FEET.
SUNDAY NIGHT
NORTHWEST WINDS 15 TO 25 KNOTS BECOMING NORTH
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES 2 TO 4 FEET.
MONDAY
NORTH WINDS 10 TO 20 KNOTS VEERING NORTHEAST. WAVES
SUBSIDING TO CALM TO 2 FEET.
TUESDAY
EAST WINDS 5 TO 15 KNOTS BECOMING SOUTH 10 TO
20 KNOTS. WAVES CALM TO 2 FEET.
LSZ261-230545-
MAFOR 2221 AMD/
SUPERIOR WEST 12210 19214 11204 12200 19204 11300 19304 11300
11200. WAVES 2 FEET OR LESS.
SUPERIOR NORTH CENTRAL 11314 11310 19314 11314 11310 19314 12410
19414 11410 11310. WAVES 2 FEET OR LESS.
SUPERIOR SOUTH CENTRAL 11310 19314 11310 11320 14420 11420. WAVES
1 TO 3 FEET.
SUPERIOR EAST 11200 11300 11310 11410 13420 11310. WAVES 2 FEET
OR LESS TONIGHT. WAVES 2 TO 3 FEET FRIDAY.
TAP
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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