842
FZUS63 KMQT 220801
GLFLS
OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
400 AM 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
30.3 INCH HIGH PRESSURE BECOMES CENTERED OVER NORTHERN ONTARIO AND
THE UPPER GREAT LAKES THIS MORNING. BY FRIDAY AFTERNOON, THE HIGH
BUILDS TO 30.5 INCHES OVER SOUTHERN QUEBEC AS A 29.5 INCH LOW MOVES
INTO EASTERN MONTANA. BY SATURDAY AFTERNOON, THE HIGH CONTINUES INTO
NEW ENGLAND AS THE LOW LIFTS NORTH OF LAKE WINNIPEG INTO NORTHERN
MANITOBA, STRENGTHENING TO 29.2 INCHES BY SATURDAY EVENING. THE LOW
THEN LIFTS NORTHEAST TO 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.
LSZ162-222000-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
400 AM EDT THU OCT 22 2026 /300 AM CDT THU OCT 22 2026/
EARLY THIS MORNING
NORTHEAST WINDS 5 TO 15 KNOTS. WAVES CALM
TO 2 FEET.
TODAY
EAST WINDS 5 TO 15 KNOTS. PATCHY FOG. WAVES CALM TO
2 FEET.
TONIGHT
NORTHEAST WINDS 5 TO 15 KNOTS. PATCHY FOG. WAVES CALM
TO 2 FEET.
FRIDAY
EAST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
FRIDAY NIGHT
EAST WINDS 5 TO 15 KNOTS BECOMING SOUTH 10 TO
20 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF SHOWERS. WAVES
BUILDING TO 2 TO 4 FEET.
SATURDAY
SOUTH WINDS 15 TO 25 KNOTS VEERING SOUTHWEST BY MID
AFTERNOON. A CHANCE OF SHOWERS BY MID AFTERNOON. WAVES BUILDING
TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
SATURDAY NIGHT
WEST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO
CALM TO 2 FEET.
SUNDAY
WEST WINDS 5 TO 15 KNOTS VEERING NORTH. WAVES CALM TO
2 FEET.
MONDAY
NORTHEAST WINDS 10 TO 20 KNOTS. WAVES CALM TO 2 FEET.
LSZ263-222000-
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 THU OCT 22 2026
EARLY THIS MORNING
EAST WINDS LESS THAN 10 KNOTS. PATCHY DENSE
FOG. WAVES CALM TO 2 FEET.
TODAY
EAST WINDS LESS THAN 10 KNOTS INCREASING TO 5 TO
15 KNOTS IN THE AFTERNOON. PATCHY FOG. WAVES CALM TO 2 FEET.
TONIGHT
EAST WINDS 5 TO 15 KNOTS VEERING SOUTH LATE. PATCHY
FOG. WAVES CALM TO 2 FEET.
FRIDAY
SOUTH WINDS 5 TO 15 KNOTS DIMINISHING TO LESS THAN
10 KNOTS IN THE AFTERNOON, THEN BECOMING SOUTHEAST 5 TO 15 KNOTS
LATE. WAVES CALM TO 2 FEET.
FRIDAY NIGHT
SOUTH WINDS 10 TO 20 KNOTS. WAVES BUILDING TO
2 TO 4 FEET.
SATURDAY
SOUTH WINDS 15 TO 25 KNOTS. 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 5 TO 15 KNOTS VEERING NORTH. WAVES SUBSIDING
TO CALM TO 2 FEET, THEN BUILDING TO 1 TO 3 FEET.
MONDAY
NORTHEAST WINDS 5 TO 15 KNOTS. WAVES SUBSIDING TO CALM
TO 2 FEET.
LSZ264-222000-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
400 AM EDT THU OCT 22 2026
..DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM EDT THIS MORNING
EARLY THIS MORNING
EAST WINDS LESS THAN 10 KNOTS. AREAS OF
DENSE FOG. WAVES CALM TO 2 FEET.
TODAY
EAST WINDS LESS THAN 10 KNOTS VEERING SOUTHEAST IN THE
AFTERNOON, THEN INCREASING TO 5 TO 15 KNOTS LATE. AREAS OF DENSE
FOG THROUGH EARLY AFTERNOON, THEN PATCHY FOG BY MID AFTERNOON.
WAVES CALM TO 2 FEET.
TONIGHT
SOUTHEAST WINDS 5 TO 15 KNOTS VEERING SOUTH LATE.
PATCHY FOG. WAVES CALM TO 2 FEET.
FRIDAY
SOUTH WINDS 5 TO 15 KNOTS BACKING SOUTHEAST LATE.
PATCHY DENSE FOG THROUGH EARLY AFTERNOON. WAVES BUILDING TO 1 TO
3 FEET.
FRIDAY NIGHT
SOUTH WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 2 TO 4 FEET.
SATURDAY
SOUTH WINDS 15 TO 25 KNOTS. WAVES BUILDING TO 4 TO
7 FEET OCCASIONALLY TO 9 FEET.
SATURDAY NIGHT
SOUTHWEST WINDS 10 TO 20 KNOTS BECOMING WEST
5 TO 15 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS THROUGH
MIDNIGHT. WAVES SUBSIDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
SUNDAY
WEST WINDS 10 TO 20 KNOTS BECOMING NORTH 5 TO 15 KNOTS.
WAVES SUBSIDING TO CALM TO 2 FEET, THEN BUILDING TO 1 TO 3 FEET.
MONDAY
NORTH WINDS 5 TO 15 KNOTS VEERING NORTHEAST. WAVES
SUBSIDING TO CALM TO 2 FEET.
LSZ265-222000-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
400 AM EDT THU OCT 22 2026
..DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM EDT THIS MORNING
EARLY THIS MORNING
NORTHEAST WINDS 5 TO 15 KNOTS. AREAS OF
DENSE FOG. WAVES CALM TO 2 FEET.
TODAY
EAST WINDS 5 TO 15 KNOTS. AREAS OF DENSE FOG THROUGH
EARLY 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.
FRIDAY
SOUTH WINDS 5 TO 15 KNOTS BECOMING SOUTHEAST 10 TO
20 KNOTS LATE. WAVES BUILDING TO 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. WAVES BUILDING TO 3 TO
6 FEET OCCASIONALLY TO 8 FEET.
SATURDAY NIGHT
SOUTH WINDS 15 TO 25 KNOTS VEERING WEST AFTER
MIDNIGHT. A CHANCE OF SHOWERS. WAVES SUBSIDING TO 1 TO 3 FEET.
SUNDAY
WEST WINDS 15 TO 25 KNOTS VEERING NORTH. WAVES
SUBSIDING TO CALM TO 2 FEET, THEN BUILDING TO 1 TO 3 FEET.
MONDAY
NORTH WINDS 10 TO 20 KNOTS VEERING NORTHEAST. WAVES
SUBSIDING TO CALM TO 2 FEET.
LSZ266-222000-
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 THU OCT 22 2026
..DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM EDT THIS MORNING
EARLY THIS MORNING
NORTHEAST WINDS 5 TO 15 KNOTS. AREAS OF
DENSE FOG. WAVES CALM TO 2 FEET.
TODAY
EAST WINDS 5 TO 15 KNOTS. PATCHY FOG THROUGH EARLY
AFTERNOON. WAVES CALM TO 2 FEET.
TONIGHT
SOUTHEAST WINDS 5 TO 15 KNOTS BECOMING SOUTH 10 TO
20 KNOTS AFTER MIDNIGHT. PATCHY FOG AFTER MIDNIGHT. WAVES
BUILDING TO 1 TO 3 FEET.
FRIDAY
SOUTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS IN THE 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 5 TO 8 FEET
OCCASIONALLY TO 10 FEET.
SATURDAY NIGHT
SOUTH WINDS 20 TO 30 KNOTS BECOMING SOUTHWEST
15 TO 25 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS. WAVES
SUBSIDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
SUNDAY
NORTHWEST WINDS 15 TO 25 KNOTS BECOMING NORTH 10 TO
20 KNOTS. A CHANCE OF SHOWERS. WAVES SUBSIDING TO 1 TO 3 FEET.
MONDAY
NORTH WINDS 10 TO 20 KNOTS VEERING NORTHEAST. WAVES
SUBSIDING TO CALM TO 2 FEET.
LSZ267-222000-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
400 AM EDT THU OCT 22 2026
EARLY THIS MORNING
NORTHEAST WINDS 5 TO 15 KNOTS. PATCHY FOG.
WAVES CALM TO 2 FEET.
TODAY
NORTHEAST WINDS 5 TO 15 KNOTS VEERING EAST IN THE
AFTERNOON. PATCHY FOG THROUGH EARLY AFTERNOON. WAVES CALM TO
2 FEET.
TONIGHT
EAST WINDS 5 TO 15 KNOTS BECOMING SOUTH 10 TO 20 KNOTS
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
FRIDAY
SOUTH WINDS 10 TO 20 KNOTS BACKING SOUTHEAST LATE.
WAVES BUILDING TO 1 TO 3 FEET.
FRIDAY NIGHT
SOUTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS AFTER MIDNIGHT. 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 6 FEET
OCCASIONALLY TO 8 FEET.
SATURDAY NIGHT
SOUTH WINDS 20 TO 30 KNOTS BECOMING SOUTHWEST
15 TO 25 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS. WAVES
SUBSIDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
SUNDAY
WEST WINDS 15 TO 25 KNOTS BECOMING NORTH 10 TO
20 KNOTS. A CHANCE OF SHOWERS. WAVES SUBSIDING TO 1 TO 3 FEET,
THEN BUILDING TO 2 TO 4 FEET.
MONDAY
NORTH WINDS 10 TO 20 KNOTS VEERING NORTHEAST. WAVES
SUBSIDING TO CALM TO 2 FEET.
LSZ261-221400-
MAFOR 2209/
SUPERIOR WEST 14200 11200 12100 11200. WAVES 1 FOOT OR LESS.
SUPERIOR NORTH CENTRAL 12204 13300 13310. WAVES 2 FEET OR LESS.
SUPERIOR SOUTH CENTRAL 11104 11204 11200 11210 13310 11420. WAVES
2 FEET OR LESS.
SUPERIOR EAST 12100 13200 11300 11310 11410. 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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