817
FZUS63 KMQT 071401
GLFLS
OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
1001 AM EDT WED MAY 7 2025
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
RIDGING BUILDS OVER LAKE SUPERIOR THANKS TO A 30.5 INCH
HIGH TRAVERSING ONTARIO THROUGH THURSDAY NIGHT. RIDGING OVER LAKE
SUPERIOR WILL BUILD TO 30.4 INCHES LATE TODAY, THEN SLOWLY WEAKEN
INTO FRIDAY AS A 30.1 INCH TROUGH APPROACHES FROM THE WEST. THIS
TROUGH WILL PASS OVER LAKE SUPERIOR FRIDAY NIGHT, QUICKLY REPLACED
BY HIGH PRESSURE RIDGING AT 30.3 INCHES FOR SATURDAY AND SATURDAY
NIGHT AS A 30.4 INCH HIGH TRACKS EAST OVER ONTARIO. RIDGING WEAKENS
TO 30.0 INCHES ON SUNDAY AS TROUGHING DEVELOPS TO THE NORTHWEST.
LSZ162-072000-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
1001 AM EDT WED MAY 7 2025 /901 AM CDT WED MAY 7 2025/
REST OF TODAY
NORTHEAST WINDS 15 TO 25 KNOTS VEERING EAST IN
THE AFTERNOON. WAVES 2 TO 4 FEET BUILDING TO 3 TO 5 FEET
OCCASIONALLY TO 7 FEET.
TONIGHT
NORTHEAST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
THURSDAY
EAST WINDS 5 TO 15 KNOTS BECOMING NORTHEAST 10 TO
20 KNOTS IN THE AFTERNOON. WAVES CALM TO 2 FEET.
THURSDAY NIGHT
NORTHEAST WINDS 5 TO 15 KNOTS VEERING SOUTHWEST
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
FRIDAY
SOUTHWEST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
FRIDAY NIGHT
WEST WINDS 10 TO 20 KNOTS VEERING NORTH AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
SATURDAY
EAST WINDS 10 TO 20 KNOTS BECOMING NORTHEAST 5 TO
15 KNOTS. WAVES CALM TO 2 FEET.
SUNDAY
SOUTHWEST WINDS 10 TO 20 KNOTS. WAVES BUILDING TO 1 TO
3 FEET, THEN SUBSIDING TO CALM TO 2 FEET.
LSZ263-072000-
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 AM EDT WED MAY 7 2025
REST OF TODAY
NORTHEAST WINDS 15 TO 25 KNOTS VEERING EAST
LATE. WAVES 2 TO 4 FEET BUILDING TO 3 TO 5 FEET OCCASIONALLY TO
7 FEET.
TONIGHT
EAST WINDS 10 TO 20 KNOTS BECOMING NORTHEAST 5 TO
15 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
THURSDAY
EAST WINDS 5 TO 15 KNOTS BACKING NORTHEAST IN THE
AFTERNOON. WAVES CALM TO 2 FEET.
THURSDAY NIGHT
EAST WINDS 5 TO 15 KNOTS VEERING SOUTHWEST
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
FRIDAY
SOUTHWEST WINDS 10 TO 20 KNOTS. A SLIGHT CHANCE OF RAIN
SHOWERS BY MID AFTERNOON. WAVES BUILDING TO 2 TO 4 FEET.
FRIDAY NIGHT
WEST WINDS 5 TO 15 KNOTS BECOMING NORTH 10 TO
20 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.
SATURDAY
NORTHEAST WINDS 10 TO 20 KNOTS BECOMING EAST 5 TO
15 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET.
SUNDAY
SOUTHWEST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS. WAVES BUILDING TO 2 TO 4 FEET.
LSZ264-072000-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
1001 AM EDT WED MAY 7 2025
REST OF TODAY
NORTHEAST WINDS 10 TO 20 KNOTS DIMINISHING TO
5 TO 15 KNOTS LATE. WAVES 3 TO 5 FEET OCCASIONALLY TO 7 FEET
SUBSIDING TO CALM TO 2 FEET.
TONIGHT
NORTH WINDS 5 TO 15 KNOTS VEERING EAST LATE. WAVES
CALM TO 2 FEET.
THURSDAY
EAST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
THURSDAY NIGHT
SOUTHEAST WINDS 5 TO 15 KNOTS VEERING SOUTH
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
FRIDAY
SOUTHWEST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF RAIN SHOWERS BY MID
AFTERNOON. WAVES BUILDING TO 1 TO 3 FEET.
FRIDAY NIGHT
SOUTHWEST WINDS 5 TO 15 KNOTS BECOMING NORTH
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 2 TO 4 FEET.
SATURDAY
NORTHEAST WINDS 10 TO 20 KNOTS BECOMING SOUTH 5 TO
15 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET.
SUNDAY
SOUTH WINDS 5 TO 15 KNOTS BECOMING SOUTHWEST 10 TO
20 KNOTS. WAVES BUILDING TO 2 TO 4 FEET.
LSZ265-072000-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
1001 AM EDT WED MAY 7 2025
REST OF TODAY
NORTHEAST WINDS 15 TO 25 KNOTS BACKING NORTH IN
THE AFTERNOON, THEN DIMINISHING TO 10 TO 20 KNOTS LATE. WAVES
3 TO 5 FEET OCCASIONALLY TO 7 FEET SUBSIDING TO 2 TO 4 FEET.
TONIGHT
NORTH WINDS 10 TO 20 KNOTS VEERING EAST LATE. WAVES
SUBSIDING TO CALM TO 2 FEET.
THURSDAY
EAST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS LATE. WAVES CALM TO 2 FEET.
THURSDAY NIGHT
SOUTHEAST WINDS 5 TO 15 KNOTS VEERING SOUTH
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
FRIDAY
SOUTHWEST WINDS 5 TO 15 KNOTS BECOMING SOUTH 10 TO
20 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
FRIDAY NIGHT
SOUTH WINDS 10 TO 20 KNOTS BACKING NORTH AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
SATURDAY
NORTH WINDS 10 TO 20 KNOTS BECOMING SOUTHEAST 5 TO
15 KNOTS. WAVES BUILDING TO 1 TO 3 FEET, THEN SUBSIDING TO CALM
TO 2 FEET.
SUNDAY
SOUTH WINDS 10 TO 20 KNOTS. WAVES CALM TO 2 FEET.
LSZ266-072000-
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 AM EDT WED MAY 7 2025
REST OF TODAY
NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS LATE. WAVES 3 TO 6 FEET OCCASIONALLY TO 8 FEET SUBSIDING
TO 2 TO 4 FEET.
TONIGHT
NORTH WINDS 10 TO 20 KNOTS VEERING EAST LATE. WAVES
SUBSIDING TO 1 TO 3 FEET.
THURSDAY
EAST WINDS 10 TO 20 KNOTS BECOMING NORTHEAST 5 TO
15 KNOTS IN THE AFTERNOON, THEN BACKING NORTH LATE. WAVES
SUBSIDING TO CALM TO 2 FEET.
THURSDAY NIGHT
SOUTHEAST WINDS 5 TO 15 KNOTS VEERING SOUTH
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
FRIDAY
SOUTH WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
FRIDAY NIGHT
SOUTH WINDS 10 TO 20 KNOTS BACKING NORTH AFTER
MIDNIGHT. WAVES BUILDING TO 1 TO 3 FEET.
SATURDAY
NORTH WINDS 10 TO 20 KNOTS BECOMING SOUTH 5 TO
15 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET.
SUNDAY
SOUTH WINDS 10 TO 20 KNOTS. WAVES BUILDING TO 1 TO
3 FEET.
LSZ267-072000-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
1001 AM EDT WED MAY 7 2025
REST OF TODAY
NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS LATE. WAVES 3 TO 5 FEET OCCASIONALLY TO 7 FEET SUBSIDING
TO 2 TO 4 FEET.
TONIGHT
NORTH WINDS 10 TO 20 KNOTS VEERING NORTHEAST AFTER
MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
THURSDAY
NORTHEAST WINDS 5 TO 15 KNOTS BACKING NORTH IN THE
AFTERNOON, THEN BECOMING NORTHWEST 10 TO 20 KNOTS LATE. WAVES
CALM TO 2 FEET.
THURSDAY NIGHT
NORTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
FRIDAY
SOUTH WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
FRIDAY NIGHT
SOUTH WINDS 5 TO 15 KNOTS BECOMING NORTH 10 TO
20 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
SATURDAY
NORTH WINDS 10 TO 20 KNOTS VEERING SOUTHEAST. WAVES
BUILDING TO 1 TO 3 FEET, THEN SUBSIDING TO CALM TO 2 FEET.
SUNDAY
SOUTH WINDS 10 TO 20 KNOTS. WAVES BUILDING TO 1 TO
3 FEET.
LSZ261-072000-
MAFOR 0715/
SUPERIOR WEST 11130 11230 11220 12110 12100 11200. WAVES 2 TO 4
FEET THIS AFTERNOON. WAVES 2 TO 4 FEET SUBSIDING TO 1 TO 3 FEET
TONIGHT. WAVES AROUND 1 FOOT THURSDAY MORNING.
SUPERIOR NORTH CENTRAL 11130 11120 13810 11110 11210 11200. WAVES
3 TO 5 FEET SUBSIDING TO 2 TO 4 FEET THIS AFTERNOON. WAVES 1 TO 2
FEET TONIGHT AND THURSDAY MORNING.
SUPERIOR SOUTH CENTRAL 11830 12820 12810 11110 12210. WAVES 3 TO
5 FEET THIS AFTERNOON. WAVES 2 TO 4 FEET SUBSIDING TO 1 TO 3 FEET
TONIGHT. WAVES 2 TO 3 FEET THURSDAY MORNING.
SUPERIOR EAST 12830 12820 12120 12110. WAVES 3 TO 5 FEET
SUBSIDING TO 2 TO 4 FEET THIS AFTERNOON. WAVES 1 TO 3 FEET
TONIGHT AND THURSDAY MORNING.
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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