203
FZUS63 KMQT 080201
GLFLS
OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
1001 PM 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 OVER LAKE SUPERIOR BUILDS TO 30.4 INCHES
THIS EVENING, THEN SLOWLY WEAKENS TO 30.2 INCHES INTO FRIDAY AS A
30.1 INCH TROUGH APPROACHES FROM THE WEST. THIS TROUGH PASSES OVER
LAKE SUPERIOR LATE FRIDAY BEFORE QUICKLY BEING REPLACED BY 30.4 INCH
HIGH PRESSURE RIDGING SATURDAY AND SATURDAY NIGHT AS THE 30.4 INCH
PARENT HIGH TRACKS EAST OVER ONTARIO TOWARDS THE LOWER GREAT LAKES
THIS WEEKEND. RIDGING WEAKENS TO 30.0 INCHES ON SUNDAY AS TROUGHING
DEVELOPS TO THE NORTHWEST. ON MONDAY, LAKE SUPERIOR BECOMES
SANDWICHED BETWEEN A 29.4 INCH LOW PRESSURE OVER THE NORTHERN PLAINS
AND THE AFOREMENTIONED 30.4 INCH HIGH PRESSURE NOW DEPARTING EAST
INTO THE ATLANTIC.
LSZ162-080800-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
1001 PM EDT WED MAY 7 2025 /901 PM CDT WED MAY 7 2025/
REST OF TONIGHT
NORTHEAST WINDS 10 TO 20 KNOTS DIMINISHING TO
5 TO 15 KNOTS AFTER MIDNIGHT, THEN INCREASING TO 10 TO 20 KNOTS
LATE. WAVES 1 TO 3 FEET SUBSIDING TO CALM TO 2 FEET.
THURSDAY
EAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO 20 KNOTS
IN THE AFTERNOON. WAVES CALM TO 2 FEET.
THURSDAY NIGHT
NORTHEAST WINDS 5 TO 15 KNOTS BACKING NORTH
AFTER MIDNIGHT, THEN BACKING WEST LATE. 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 CALM TO 2 FEET.
FRIDAY NIGHT
WEST WINDS 10 TO 20 KNOTS VEERING NORTHEAST AFTER
MIDNIGHT. A SLIGHT CHANCE OF SHOWERS THROUGH MIDNIGHT. WAVES CALM
TO 2 FEET.
SATURDAY
NORTHEAST WINDS 10 TO 20 KNOTS VEERING EAST BY MID
AFTERNOON. WAVES BUILDING TO 1 TO 3 FEET.
SATURDAY NIGHT
NORTHEAST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING
TO CALM TO 2 FEET.
SUNDAY
SOUTHWEST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS. WAVES BUILDING TO 2 TO 4 FEET, THEN SUBSIDING TO 1 TO
3 FEET.
MONDAY
SOUTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET.
LSZ263-080800-
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 WED MAY 7 2025
REST OF TONIGHT
EAST WINDS 5 TO 15 KNOTS BACKING NORTHEAST
AFTER MIDNIGHT, THEN VEERING EAST LATE. WAVES 1 TO 3 FEET
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 BECOMING SOUTH LESS
THAN 10 KNOTS AFTER MIDNIGHT, THEN BECOMING SOUTHWEST 5 TO
15 KNOTS LATE. WAVES CALM TO 2 FEET.
FRIDAY
SOUTHWEST WINDS 10 TO 20 KNOTS. WAVES BUILDING TO 2 TO
4 FEET, THEN SUBSIDING TO 1 TO 3 FEET.
FRIDAY NIGHT
WEST WINDS 5 TO 15 KNOTS VEERING NORTHEAST AFTER
MIDNIGHT. A SLIGHT CHANCE OF RAIN SHOWERS THROUGH MIDNIGHT. WAVES
SUBSIDING TO CALM TO 2 FEET, THEN BUILDING TO 1 TO 3 FEET.
SATURDAY
NORTHEAST WINDS 5 TO 15 KNOTS VEERING EAST BY MID
AFTERNOON. WAVES 1 TO 3 FEET.
SATURDAY NIGHT
EAST WINDS 5 TO 15 KNOTS VEERING SOUTH AFTER
MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
SUNDAY
SOUTHWEST WINDS 10 TO 20 KNOTS. WAVES BUILDING TO 3 TO
5 FEET OCCASIONALLY TO 7 FEET, THEN SUBSIDING TO 2 TO 4 FEET.
MONDAY
SOUTH WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO 1 TO
3 FEET, THEN BUILDING TO 2 TO 4 FEET.
LSZ264-080800-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
1001 PM EDT WED MAY 7 2025
REST OF TONIGHT
NORTHEAST 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 BECOMING SOUTH
LESS THAN 10 KNOTS AFTER MIDNIGHT, THEN INCREASING TO 5 TO
15 KNOTS LATE. WAVES CALM TO 2 FEET.
FRIDAY
SOUTHWEST WINDS 10 TO 20 KNOTS. WAVES BUILDING TO 1 TO
3 FEET.
FRIDAY NIGHT
WEST WINDS 5 TO 15 KNOTS VEERING NORTHEAST AFTER
MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET, THEN BUILDING TO
1 TO 3 FEET.
SATURDAY
NORTHEAST WINDS 5 TO 15 KNOTS VEERING EAST BY MID
AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
SATURDAY NIGHT
SOUTHEAST WINDS 5 TO 15 KNOTS VEERING SOUTH
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
SUNDAY
SOUTH WINDS 5 TO 15 KNOTS BECOMING SOUTHWEST 10 TO
20 KNOTS. WAVES BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
MONDAY
SOUTH WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO 1 TO
3 FEET, THEN BUILDING TO 2 TO 4 FEET.
LSZ265-080800-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
1001 PM EDT WED MAY 7 2025
REST OF TONIGHT
NORTH WINDS 5 TO 15 KNOTS BECOMING NORTHEAST
10 TO 20 KNOTS AFTER MIDNIGHT, THEN VEERING EAST LATE. WAVES 1 TO
3 FEET SUBSIDING TO CALM TO 2 FEET.
THURSDAY
EAST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS IN THE AFTERNOON. 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 BACKING SOUTH BY MID
AFTERNOON. 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 BECOMING NORTHEAST 5 TO
15 KNOTS BY MID AFTERNOON. WAVES BUILDING TO 1 TO 3 FEET, THEN
SUBSIDING TO CALM TO 2 FEET.
SATURDAY NIGHT
SOUTHEAST WINDS 5 TO 15 KNOTS BECOMING SOUTH
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
SUNDAY
SOUTH WINDS 10 TO 20 KNOTS BECOMING SOUTHWEST 15 TO
25 KNOTS. WAVES BUILDING TO 1 TO 3 FEET, THEN SUBSIDING TO CALM
TO 2 FEET.
MONDAY
SOUTHEAST WINDS 10 TO 20 KNOTS VEERING SOUTH. WAVES
BUILDING TO 1 TO 3 FEET, THEN SUBSIDING TO CALM TO 2 FEET.
LSZ266-080800-
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 WED MAY 7 2025
REST OF TONIGHT
NORTHEAST WINDS 10 TO 20 KNOTS VEERING EAST
LATE. WAVES 1 TO 3 FEET.
THURSDAY
EAST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS IN THE AFTERNOON, THEN BACKING NORTH LATE. WAVES
SUBSIDING TO CALM TO 2 FEET.
THURSDAY NIGHT
NORTH 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 5 TO 15 KNOTS BECOMING NORTH 10 TO
20 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 1 TO 3 FEET.
SATURDAY
NORTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
SATURDAY NIGHT
SOUTH WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
SUNDAY
SOUTH WINDS 15 TO 25 KNOTS. WAVES BUILDING TO 3 TO
5 FEET OCCASIONALLY TO 7 FEET, THEN SUBSIDING TO 2 TO 4 FEET.
MONDAY
SOUTH WINDS 15 TO 25 KNOTS. WAVES SUBSIDING TO 1 TO
3 FEET, THEN BUILDING TO 2 TO 4 FEET.
LSZ267-080800-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
1001 PM EDT WED MAY 7 2025
REST OF TONIGHT
NORTHEAST WINDS 15 TO 25 KNOTS DIMINISHING TO
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES 1 TO 3 FEET SUBSIDING TO
CALM TO 2 FEET.
THURSDAY
EAST WINDS 5 TO 15 KNOTS BACKING NORTHEAST 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
LATE. 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 BACKING NORTH AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
SATURDAY
NORTH WINDS 10 TO 20 KNOTS. WAVES CALM TO 2 FEET.
SATURDAY NIGHT
NORTH WINDS 10 TO 20 KNOTS VEERING SOUTHEAST
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
SUNDAY
SOUTH WINDS 15 TO 25 KNOTS. WAVES BUILDING TO 3 TO
5 FEET OCCASIONALLY TO 7 FEET, THEN SUBSIDING TO 2 TO 4 FEET.
MONDAY
SOUTH WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO 1 TO
3 FEET, THEN BUILDING TO 2 TO 4 FEET.
LSZ261-080800-
MAFOR 0803/
SUPERIOR WEST 13110 12210 12110 11200. WAVES 1 TO 2 FEET.
SUPERIOR NORTH CENTRAL 11110 14210 11210 11310 11300. WAVES 2
FEET OR LESS.
SUPERIOR SOUTH CENTRAL 11120 12220 11210 11200 11100 11200 11300.
WAVES 1 TO 3 FEET.
SUPERIOR EAST 11130 12120 11220 11110 11800 11710 11800. WAVES 1
TO 3 FEET.
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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