423
FZUS63 KMQT 221505
GLFLS
OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
1005 AM EST SAT FEB 22 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
A 29.8 INCH LOW PRESSURE EXTENDING FROM EASTERN
HUDSON BAY INTO NORTHERN ONTARIO WILL CONTINUE TO SWEEP EAST
TODAY. THE TAIL END OF THIS TROUGH AT A PRESSURE OF 30.0 INCHES
WILL DROP SOUTH TO SOUTHERN LAKE SUPERIOR DURING TONIGHT. THE
TROUGH WILL THEN QUICKLY LIFT NORTH ON SUNDAY AS 29.2 INCH LOW
PRESSURE MOVES OUT OVER THE PRAIRIE PROVINCES. THE LOW WILL THEN
TRACK EAST, REACHING NORTHERN ONTARIO SUNDAY NIGHT AND NORTHERN
QUEBEC MONDAY EVENING. ONE ASSOCIATED TROUGH AT 29.4 INCHES WILL
CROSS LAKE SUPERIOR EARLY MONDAY FOLLOWED BY A SECOND AT 29.6
INCHES EARLY ON TUESDAY. IN ITS WAKE, A WEAK 29.9 INCH HIGH
PRESSURE RIDGE WILL REACH LAKE SUPERIOR TUESDAY AFTERNOON INTO
TUESDAY EVENING. ANOTHER LOW PRESSURE TROUGH OF 29.7 INCHES WILL
QUICKLY MOVE EAST ACROSS LAKE SUPERIOR ON WEDNESDAY.
LSZ162-222315-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
1005 AM EST SAT FEB 22 2025 /905 AM CST SAT FEB 22 2025/
REST OF TODAY
SOUTHWEST WINDS 15 TO 25 KNOTS BECOMING WEST 10
TO 20 KNOTS BY MID AFTERNOON. A CHANCE OF SNOW LATE IN THE
MORNING. WAVES 2 TO 4 FEET BUILDING TO 3 TO 5 FEET OCCASIONALLY TO
7 FEET, THEN SUBSIDING TO 2 TO 4 FEET.
TONIGHT
WEST WINDS 5 TO 15 KNOTS VEERING NORTHEAST BY
MIDNIGHT, THEN VEERING EAST LATE. WAVES SUBSIDING TO CALM TO
2 FEET.
SUNDAY
SOUTH WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
SUNDAY NIGHT
SOUTHWEST WINDS 10 TO 20 KNOTS INCREASING TO
20 TO 30 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW SHOWERS IN THE
EVENING. A CHANCE OF RAIN SHOWERS. WAVES BUILDING TO 3 TO 6 FEET
OCCASIONALLY TO 8 FEET.
MONDAY
WEST WINDS 15 TO 25 KNOTS. WAVES SUBSIDING TO 1 TO
3 FEET.
MONDAY NIGHT
WEST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO
CALM TO 2 FEET.
TUESDAY
WEST WINDS 10 TO 20 KNOTS BECOMING SOUTHWEST 5 TO
15 KNOTS. WAVES CALM TO 2 FEET.
WEDNESDAY
WEST WINDS 10 TO 20 KNOTS VEERING NORTHWEST. WAVES
CALM TO 2 FEET.
NOTE, WAVE HEIGHT FORECASTS ARE FOR ICE FREE AREAS.
LSZ263-222315-
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-
1005 AM EST SAT FEB 22 2025
REST OF TODAY
WEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS BY MID AFTERNOON. A CHANCE OF SNOW. WAVES 3 TO 6 FEET
OCCASIONALLY TO 8 FEET.
TONIGHT
WEST WINDS 5 TO 15 KNOTS VEERING NORTH BY MIDNIGHT,
THEN VEERING NORTHEAST LATE. WAVES SUBSIDING TO CALM TO 2 FEET.
SUNDAY
SOUTH WINDS 5 TO 15 KNOTS. A SLIGHT CHANCE OF SNOW
SHOWERS. WAVES CALM TO 2 FEET.
SUNDAY NIGHT
SOUTH WINDS 10 TO 20 KNOTS BECOMING SOUTHWEST
15 TO 25 KNOTS AFTER MIDNIGHT. SNOW SHOWERS LIKELY IN THE
EVENING. A CHANCE OF RAIN SHOWERS. A CHANCE OF SNOW SHOWERS AFTER
MIDNIGHT. WAVES BUILDING TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET.
MONDAY
WEST WINDS 15 TO 25 KNOTS. WAVES BUILDING TO 5 TO
8 FEET OCCASIONALLY TO 10 FEET, THEN SUBSIDING TO 3 TO 5 FEET
OCCASIONALLY TO 7 FEET.
MONDAY NIGHT
WEST WINDS 10 TO 20 KNOTS BECOMING NORTHWEST 5 TO
15 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
TUESDAY
WEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST. WAVES CALM
TO 2 FEET.
WEDNESDAY
WEST WINDS 5 TO 15 KNOTS BECOMING NORTHWEST 10 TO
20 KNOTS. WAVES BUILDING TO 1 TO 3 FEET.
NOTE, WAVE HEIGHT FORECASTS ARE FOR ICE FREE AREAS.
LSZ264-222315-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
1005 AM EST SAT FEB 22 2025
REST OF TODAY
WEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS BY MID AFTERNOON. A CHANCE OF SNOW. WAVES 3 TO 6 FEET
OCCASIONALLY TO 8 FEET.
TONIGHT
NORTHWEST WINDS 5 TO 15 KNOTS VEERING NORTHEAST LATE.
WAVES SUBSIDING TO CALM TO 2 FEET.
SUNDAY
SOUTHEAST WINDS 5 TO 15 KNOTS VEERING SOUTH BY LATE
MORNING, THEN INCREASING TO 10 TO 20 KNOTS BY MID AFTERNOON.
WAVES BUILDING TO 2 TO 4 FEET.
SUNDAY NIGHT
SOUTH WINDS 10 TO 20 KNOTS BECOMING SOUTHWEST
15 TO 25 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN AND SNOW SHOWERS.
WAVES BUILDING TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET.
MONDAY
WEST WINDS 15 TO 25 KNOTS. WAVES BUILDING TO 5 TO
8 FEET OCCASIONALLY TO 10 FEET, THEN SUBSIDING TO 3 TO 6 FEET
OCCASIONALLY TO 8 FEET.
MONDAY NIGHT
NORTHWEST WINDS 10 TO 20 KNOTS DIMINISHING TO
5 TO 15 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
TUESDAY
NORTH WINDS 5 TO 15 KNOTS BACKING SOUTHWEST. WAVES
CALM TO 2 FEET.
WEDNESDAY
WEST WINDS 5 TO 15 KNOTS BECOMING NORTH 10 TO
20 KNOTS. WAVES BUILDING TO 2 TO 4 FEET.
NOTE, WAVE HEIGHT FORECASTS ARE FOR ICE FREE AREAS.
LSZ265-222315-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
1005 AM EST SAT FEB 22 2025
REST OF TODAY
WEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS BY MID AFTERNOON. A CHANCE OF SNOW. WAVES CALM TO
2 FEET.
TONIGHT
WEST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
SUNDAY
SOUTH WINDS 5 TO 15 KNOTS BACKING SOUTHEAST BY LATE
MORNING, THEN VEERING SOUTH BY MID AFTERNOON. WAVES BUILDING TO
1 TO 3 FEET.
SUNDAY NIGHT
SOUTH WINDS 10 TO 20 KNOTS BECOMING SOUTHWEST
15 TO 25 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN AND SNOW SHOWERS.
WAVES BUILDING TO 2 TO 4 FEET, THEN SUBSIDING TO 1 TO 3 FEET.
MONDAY
WEST WINDS 15 TO 25 KNOTS. A CHANCE OF RAIN SHOWERS.
WAVES BUILDING TO 2 TO 4 FEET, THEN SUBSIDING TO CALM TO 2 FEET.
MONDAY NIGHT
WEST WINDS 10 TO 20 KNOTS VEERING NORTHWEST AFTER
MIDNIGHT. A CHANCE OF RAIN SHOWERS. A CHANCE OF SNOW SHOWERS
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
TUESDAY
NORTHWEST WINDS 10 TO 20 KNOTS BACKING SOUTH. WAVES
CALM TO 2 FEET.
WEDNESDAY
WEST WINDS 10 TO 20 KNOTS VEERING NORTHWEST. A
CHANCE OF RAIN SHOWERS. A CHANCE OF SNOW SHOWERS. WAVES BUILDING
TO 1 TO 3 FEET.
NOTE, WAVE HEIGHT FORECASTS ARE FOR ICE FREE AREAS.
LSZ266-222315-
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-
1005 AM EST SAT FEB 22 2025
REST OF TODAY
WEST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS BY MID AFTERNOON. A CHANCE OF SNOW. WAVES 4 TO 7 FEET
OCCASIONALLY TO 9 FEET SUBSIDING TO 3 TO 5 FEET OCCASIONALLY TO
7 FEET.
TONIGHT
WEST WINDS 10 TO 20 KNOTS BECOMING NORTH 5 TO 15 KNOTS
BY MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
SUNDAY
SOUTHEAST WINDS 5 TO 15 KNOTS BECOMING SOUTH 10 TO
20 KNOTS. WAVES BUILDING TO 2 TO 4 FEET.
SUNDAY NIGHT
SOUTH WINDS 15 TO 25 KNOTS. A CHANCE OF SNOW
SHOWERS, POSSIBLY MIXED WITH RAIN IN THE EVENING, THEN RAIN
SHOWERS, POSSIBLY MIXED WITH SNOW AFTER MIDNIGHT. WAVES BUILDING
TO 4 TO 8 FEET OCCASIONALLY TO 10 FEET.
MONDAY
WEST WINDS 15 TO 25 KNOTS. A CHANCE OF SNOW SHOWERS IN
THE MORNING. A CHANCE OF RAIN SHOWERS. WAVES BUILDING TO 6 TO
9 FEET OCCASIONALLY TO 11 FEET, THEN SUBSIDING TO 4 TO 7 FEET
OCCASIONALLY TO 9 FEET.
MONDAY NIGHT
WEST WINDS 10 TO 20 KNOTS VEERING NORTHWEST AFTER
MIDNIGHT. A CHANCE OF RAIN SHOWERS. A CHANCE OF SNOW SHOWERS
AFTER MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.
TUESDAY
NORTHWEST WINDS 10 TO 20 KNOTS BACKING SOUTH. WAVES
SUBSIDING TO CALM TO 2 FEET.
WEDNESDAY
WEST WINDS 10 TO 20 KNOTS VEERING NORTH. A CHANCE OF
SNOW SHOWERS, POSSIBLY MIXED WITH RAIN. WAVES BUILDING TO 2 TO
4 FEET.
NOTE, WAVE HEIGHT FORECASTS ARE FOR ICE FREE AREAS.
LSZ267-222315-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
1005 AM EST SAT FEB 22 2025
REST OF TODAY
SOUTHWEST WINDS 15 TO 25 KNOTS VEERING WEST. A
CHANCE OF SNOW. WAVES 4 TO 7 FEET OCCASIONALLY TO 9 FEET
SUBSIDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
TONIGHT
WEST WINDS 10 TO 20 KNOTS BECOMING NORTH 5 TO 15 KNOTS
BY MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
SUNDAY
SOUTHEAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS BY LATE MORNING, THEN VEERING SOUTH BY MID AFTERNOON.
WAVES BUILDING TO 1 TO 3 FEET.
SUNDAY NIGHT
SOUTH WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF SNOW SHOWERS,
POSSIBLY MIXED WITH RAIN IN THE EVENING, THEN SNOW SHOWERS,
POSSIBLY MIXED WITH RAIN AFTER MIDNIGHT. WAVES BUILDING TO 4 TO
7 FEET OCCASIONALLY TO 9 FEET.
MONDAY
SOUTHWEST WINDS 15 TO 25 KNOTS VEERING WEST IN THE
AFTERNOON. A CHANCE OF SNOW SHOWERS IN THE MORNING. A CHANCE OF
RAIN SHOWERS. WAVES SUBSIDING TO 3 TO 6 FEET OCCASIONALLY TO
8 FEET, THEN BUILDING TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET.
MONDAY NIGHT
WEST WINDS 10 TO 20 KNOTS VEERING NORTHWEST AFTER
MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.
TUESDAY
NORTHWEST WINDS 10 TO 20 KNOTS BACKING SOUTH. WAVES
SUBSIDING TO CALM TO 2 FEET.
WEDNESDAY
SOUTH WINDS 10 TO 20 KNOTS BACKING NORTH. A CHANCE
OF SNOW SHOWERS. WAVES BUILDING TO 1 TO 3 FEET.
NOTE, WAVE HEIGHT FORECASTS ARE FOR ICE FREE AREAS.
LSZ261-222315-
MAFOR 2216/
SUPERIOR WEST 11530 11520 11620 11710 11800 11200 11300 11400. A
CHANCE OF SNOW LATE THIS MORNING. WAVES 3 TO 5 FEET THIS AFTERNOON
SUBSIDING TO 1 TO 3 FEET TONIGHT. WAVES 1 FOOT OR LESS SUNDAY
MORNING.
SUPERIOR NORTH CENTRAL 12630 11620 11710 11810 11110 11200 11310.
A CHANCE OF SNOW THIS AFTERNOON. WAVES 3 TO 6 FEET THIS AFTERNOON
SUBSIDING TO 1 TO 3 FEET TONIGHT. WAVES 2 FEET OR LESS SUNDAY
MORNING.
SUPERIOR SOUTH CENTRAL 11630 12620 11720 11710 11700 11800 11400. A
CHANCE OF SNOW THIS AFTERNOON. WAVES 1 TO 4 FEET THIS AFTERNOON.
WAVES 2 FEET OR LESS TONIGHT AND SUNDAY MORNING. WAVE HEIGHTS ARE
FOR ICE FREE AREAS.
SUPERIOR EAST 12630 11627 11620 11710 11810 11110 11210. WAVES 3
TO 7 FEET THIS AFTERNOON SUBSIDING TO 1 TO 3 FEET TONIGHT. WAVES
2 FEET OR LESS SUNDAY MORNING.
ROLFSON
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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