718
FZUS63 KMQT 270801
GLFLS
OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
401 AM EDT MON APR 27 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 MORNING, LAKE SUPERIOR IS BETWEEN A 30.3 INCH HIGH OVER QUEBEC
AND A 29.5 INCH LOW OVER OKLAHOMA. THROUGHOUT TODAY, THIS LOW MOVES
NORTHEAST, REACHING THE UPPER PENINSULA LATE THIS EVENING AND
CROSSES THE LAKE AT 29.4 INCHES BY EARLY TUESDAY MORNING. THE LOW
REACHES JAMES BAY TUESDAY AFTERNOON WHILE 30.1 INCH HIGH PRESSURE
BUILDS OVER THE CANADIAN PRAIRIE. AS THE LOW FURTHER MOVES
NORTHEAST, THE HIGH BUILDS TO 30.2 INCHES WHILE A 29.8 INCH LOW
PASSES SOUTH OF THE LOWER GREAT LAKES WEDNESDAY. BY THURSDAY NIGHT,
THE 30.2 INCH HIGH WILL SPAN FROM HUDSON BAY TO THE CENTRAL PLAINS
WHILE LOW PRESSURE OF 29.5 INCHES WILL BE OFF CAPE COD. THE HIGH
THEN SHIFTS DIRECTLY OVER LAKE SUPERIOR BY SATURDAY AHEAD OF THE
ARRIVAL OF A WEAK TROUGH LATE SATURDAY INTO SUNDAY.
LSZ162-272000-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
401 AM EDT MON APR 27 2026 /301 AM CDT MON APR 27 2026/
...DENSE FOG ADVISORY IN EFFECT UNTIL 8 AM EDT /7 AM CDT/ THIS
MORNING...
EARLY THIS MORNING
NORTHEAST WINDS 15 TO 25 KNOTS. PATCHY
DENSE FOG. A SLIGHT CHANCE OF RAIN SHOWERS. WAVES 2 TO 4 FEET
BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
TODAY
NORTHEAST WINDS 15 TO 25 KNOTS. RAIN SHOWERS. WAVES
BUILDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
TONIGHT
NORTHEAST WINDS 10 TO 20 KNOTS BECOMING NORTHWEST
15 TO 25 KNOTS AFTER MIDNIGHT, THEN BECOMING WEST 20 TO 30 KNOTS
LATE. RAIN SHOWERS THROUGH MIDNIGHT, THEN A CHANCE OF RAIN
SHOWERS AFTER MIDNIGHT. WAVES SUBSIDING TO 3 TO 5 FEET
OCCASIONALLY TO 7 FEET.
TUESDAY
WEST WINDS 20 TO 30 KNOTS DIMINISHING TO 10 TO
20 KNOTS LATE. WAVES SUBSIDING TO 1 TO 3 FEET.
TUESDAY NIGHT
NORTHWEST WINDS 5 TO 15 KNOTS. WAVES SUBSIDING
TO CALM TO 2 FEET.
WEDNESDAY
WEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
WEDNESDAY NIGHT
NORTH WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
THURSDAY
NORTHEAST WINDS 5 TO 15 KNOTS BACKING NORTH. WAVES
CALM TO 2 FEET.
FRIDAY
SOUTHEAST WINDS 5 TO 15 KNOTS VEERING NORTHWEST. WAVES
CALM TO 2 FEET.
LSZ263-272000-
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-
401 AM EDT MON APR 27 2026
..DENSE FOG ADVISORY IN EFFECT UNTIL 8 AM EDT THIS MORNING
EARLY THIS MORNING
EAST WINDS 10 TO 20 KNOTS. PATCHY DENSE
FOG. A SLIGHT CHANCE OF RAIN SHOWERS. WAVES 2 TO 4 FEET.
TODAY
EAST WINDS 15 TO 25 KNOTS. A CHANCE OF RAIN SHOWERS
THROUGH EARLY AFTERNOON, THEN RAIN SHOWERS AND A SLIGHT CHANCE OF
THUNDERSTORMS BY MID AFTERNOON. WAVES BUILDING TO 4 TO 7 FEET
OCCASIONALLY TO 9 FEET.
TONIGHT
EAST WINDS 15 TO 25 KNOTS BACKING NORTH AFTER
MIDNIGHT, THEN BECOMING NORTHWEST 20 TO 30 KNOTS LATE. RAIN
SHOWERS LIKELY THROUGH MIDNIGHT, THEN A CHANCE OF RAIN SHOWERS
AFTER MIDNIGHT. WAVES BUILDING TO 6 TO 9 FEET OCCASIONALLY TO
11 FEET, THEN SUBSIDING TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET.
TUESDAY
WEST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS IN THE AFTERNOON. A SLIGHT CHANCE OF RAIN SHOWERS
THROUGH EARLY AFTERNOON. WAVES BUILDING TO 5 TO 8 FEET
OCCASIONALLY TO 10 FEET, THEN SUBSIDING TO 3 TO 5 FEET
OCCASIONALLY TO 7 FEET.
TUESDAY NIGHT
NORTHWEST WINDS 10 TO 20 KNOTS DIMINISHING TO
5 TO 15 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
WEDNESDAY
WEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
WEDNESDAY NIGHT
NORTH WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
THURSDAY
NORTH WINDS 5 TO 15 KNOTS BACKING NORTHWEST. WAVES
CALM TO 2 FEET.
FRIDAY
NORTH WINDS 5 TO 15 KNOTS BACKING WEST. WAVES CALM TO
2 FEET.
LSZ264-272000-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
401 AM EDT MON APR 27 2026
..DENSE FOG ADVISORY IN EFFECT UNTIL 8 AM EDT THIS MORNING
...GALE WARNING IN EFFECT FROM THIS AFTERNOON THROUGH TUESDAY
AFTERNOON...
EARLY THIS MORNING
EAST WINDS 10 TO 20 KNOTS. WAVES CALM TO
2 FEET BUILDING TO 1 TO 3 FEET.
TODAY
EAST WINDS 15 TO 25 KNOTS BECOMING SOUTHEAST 20 TO
30 KNOTS IN THE AFTERNOON, THEN INCREASING TO GALES TO 35 KNOTS
LATE. A CHANCE OF RAIN SHOWERS THROUGH EARLY AFTERNOON, THEN RAIN
SHOWERS AND A SLIGHT CHANCE OF THUNDERSTORMS BY MID AFTERNOON.
WAVES BUILDING TO 6 TO 9 FEET OCCASIONALLY TO 11 FEET.
TONIGHT
SOUTHEAST GALES TO 35 KNOTS DIMINISHING TO 20 TO
30 KNOTS AFTER MIDNIGHT, THEN VEERING NORTHWEST LATE. RAIN
SHOWERS THROUGH MIDNIGHT, THEN A CHANCE OF RAIN SHOWERS AFTER
MIDNIGHT. WAVES BUILDING TO 8 TO 11 FEET OCCASIONALLY TO 14 FEET,
THEN SUBSIDING TO 6 TO 9 FEET OCCASIONALLY TO 11 FEET.
TUESDAY
WEST GALES TO 35 KNOTS DIMINISHING TO 20 TO 30 KNOTS
LATE. A SLIGHT CHANCE OF RAIN SHOWERS THROUGH EARLY AFTERNOON.
WAVES SUBSIDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
TUESDAY NIGHT
NORTHWEST WINDS 10 TO 20 KNOTS DIMINISHING TO
5 TO 15 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
WEDNESDAY
NORTHWEST WINDS 5 TO 15 KNOTS BACKING WEST BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
WEDNESDAY NIGHT
NORTHWEST WINDS LESS THAN 10 KNOTS BECOMING
NORTH 5 TO 15 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
THURSDAY
NORTH WINDS 5 TO 15 KNOTS BACKING NORTHWEST. WAVES
CALM TO 2 FEET.
FRIDAY
NORTH WINDS 5 TO 15 KNOTS BACKING NORTHWEST. WAVES CALM
TO 2 FEET.
LSZ265-272000-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
401 AM EDT MON APR 27 2026
...GALE WARNING IN EFFECT FROM THIS AFTERNOON THROUGH TUESDAY
AFTERNOON...
EARLY THIS MORNING
SOUTHEAST WINDS 15 TO 25 KNOTS. WAVES CALM
TO 2 FEET BUILDING TO 1 TO 3 FEET.
TODAY
SOUTHEAST WINDS 20 TO 30 KNOTS INCREASING TO GALES TO
35 KNOTS IN THE AFTERNOON. A CHANCE OF RAIN SHOWERS. A SLIGHT
CHANCE OF THUNDERSTORMS BY MID AFTERNOON. WAVES BUILDING TO 5 TO
8 FEET OCCASIONALLY TO 10 FEET.
TONIGHT
SOUTHEAST GALES TO 35 KNOTS DIMINISHING TO 20 TO
30 KNOTS AFTER MIDNIGHT, THEN VEERING WEST LATE. RAIN SHOWERS
LIKELY AND A SLIGHT CHANCE OF THUNDERSTORMS THROUGH MIDNIGHT,
THEN A CHANCE OF RAIN SHOWERS AFTER MIDNIGHT. WAVES BUILDING TO
7 TO 10 FEET OCCASIONALLY TO 13 FEET, THEN SUBSIDING TO 3 TO
6 FEET OCCASIONALLY TO 8 FEET.
TUESDAY
WEST GALES TO 40 KNOTS DIMINISHING TO 20 TO 30 KNOTS
LATE. A SLIGHT CHANCE OF RAIN SHOWERS THROUGH EARLY AFTERNOON.
WAVES BUILDING TO 5 TO 8 FEET OCCASIONALLY TO 10 FEET, THEN
SUBSIDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
TUESDAY NIGHT
NORTHWEST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING
TO CALM TO 2 FEET.
WEDNESDAY
NORTHWEST WINDS 10 TO 20 KNOTS. WAVES CALM TO
2 FEET.
WEDNESDAY NIGHT
NORTHWEST WINDS 5 TO 15 KNOTS INCREASING TO
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
THURSDAY
NORTH WINDS 10 TO 20 KNOTS BECOMING NORTHWEST 5 TO
15 KNOTS. WAVES CALM TO 2 FEET.
FRIDAY
NORTH WINDS 10 TO 20 KNOTS BACKING NORTHWEST. WAVES
CALM TO 2 FEET.
LSZ266-272000-
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-
401 AM EDT MON APR 27 2026
...GALE WARNING IN EFFECT FROM 3 PM EDT THIS AFTERNOON THROUGH
TUESDAY AFTERNOON...
EARLY THIS MORNING
SOUTHEAST WINDS 15 TO 25 KNOTS. WAVES 1 TO
3 FEET.
TODAY
SOUTHEAST WINDS 20 TO 30 KNOTS INCREASING TO GALES TO
40 KNOTS IN THE AFTERNOON. A CHANCE OF RAIN SHOWERS BY MID
AFTERNOON. WAVES BUILDING TO 8 TO 11 FEET OCCASIONALLY TO
14 FEET.
TONIGHT
SOUTHEAST GALES TO 45 KNOTS BECOMING SOUTH GALES TO
35 KNOTS LATE. A SLIGHT CHANCE OF THUNDERSTORMS THROUGH MIDNIGHT.
RAIN SHOWERS. WAVES BUILDING TO 9 TO 12 FEET OCCASIONALLY TO
15 FEET, THEN SUBSIDING TO 6 TO 9 FEET OCCASIONALLY TO 11 FEET.
TUESDAY
WEST GALES TO 40 KNOTS. A SLIGHT CHANCE OF RAIN
SHOWERS THROUGH EARLY AFTERNOON. WAVES SUBSIDING TO 5 TO 8 FEET
OCCASIONALLY TO 10 FEET, THEN BUILDING TO 10 TO 14 FEET
OCCASIONALLY TO 18 FEET.
TUESDAY NIGHT
NORTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.
WEDNESDAY
NORTHWEST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO
CALM TO 2 FEET.
WEDNESDAY NIGHT
NORTHWEST WINDS 10 TO 20 KNOTS VEERING NORTH
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
THURSDAY
NORTH WINDS 10 TO 20 KNOTS BACKING NORTHWEST. WAVES
BUILDING TO 1 TO 3 FEET.
FRIDAY
NORTH WINDS 15 TO 25 KNOTS BACKING NORTHWEST. WAVES
BUILDING TO 2 TO 4 FEET, THEN SUBSIDING TO 1 TO 3 FEET.
LSZ267-272000-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
401 AM EDT MON APR 27 2026
...GALE WARNING IN EFFECT FROM 3 PM EDT THIS AFTERNOON THROUGH
TUESDAY AFTERNOON...
EARLY THIS MORNING
SOUTHEAST WINDS 15 TO 25 KNOTS. WAVES 1 TO
3 FEET.
TODAY
SOUTHEAST WINDS 15 TO 25 KNOTS INCREASING TO GALES TO
40 KNOTS IN THE AFTERNOON. A SLIGHT CHANCE OF RAIN SHOWERS BY MID
AFTERNOON. WAVES BUILDING TO 8 TO 11 FEET OCCASIONALLY TO
14 FEET.
TONIGHT
SOUTHEAST GALES TO 45 KNOTS. A SLIGHT CHANCE OF
THUNDERSTORMS THROUGH MIDNIGHT. RAIN SHOWERS. WAVES BUILDING TO
9 TO 12 FEET OCCASIONALLY TO 15 FEET, THEN SUBSIDING TO 5 TO
8 FEET OCCASIONALLY TO 10 FEET.
TUESDAY
WEST GALES TO 40 KNOTS. A CHANCE OF RAIN SHOWERS
THROUGH EARLY AFTERNOON. WAVES BUILDING TO 10 TO 14 FEET
OCCASIONALLY TO 18 FEET, THEN SUBSIDING TO 9 TO 12 FEET
OCCASIONALLY TO 15 FEET.
TUESDAY NIGHT
NORTHWEST WINDS 15 TO 25 KNOTS DIMINISHING TO
5 TO 15 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.
WEDNESDAY
NORTHWEST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
WEDNESDAY NIGHT
NORTHWEST WINDS 10 TO 20 KNOTS VEERING NORTH
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
THURSDAY
NORTHWEST WINDS 10 TO 20 KNOTS VEERING NORTH. WAVES
BUILDING TO 2 TO 4 FEET, THEN SUBSIDING TO 1 TO 3 FEET.
FRIDAY
NORTHWEST WINDS 15 TO 25 KNOTS VEERING NORTH. WAVES
BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET, THEN SUBSIDING TO
1 TO 3 FEET.
LSZ261-271400-
MAFOR 2709/
SUPERIOR WEST 11230 19234 11230 13236 11226 11120 11730. WAVES 3
TO 6 FEET.
SUPERIOR NORTH CENTRAL...GALE WARNING IN EFFECT...11220 11330
12340 12356 11346 11430. WAVES 2 TO 4 FEET BUILDING TO 4 TO 7
FEET TODAY. WAVES 6 TO 9 FEET BUILDING TO 7 TO 11 FEET TONIGHT.
SUPERIOR SOUTH CENTRAL...GALE WARNING IN EFFECT...11320 11330
12340 12356 11346 11440. WAVES 2 TO 3 FEET BUILDING TO 5 TO 7
FEET TODAY. WAVES 5 TO 9 FEET TONIGHT.
SUPERIOR EAST...GALE WARNING IN EFFECT...11320 11330 11340 11350
11360 12366 11356. WAVES 2 TO 4 FEET BUILDING TO 5 TO 9 FEET
TODAY. WAVES 8 TO 12 FEET TONIGHT.
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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