009
FZUS63 KMQT 021959
GLFLS
OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
359 PM EDT WED APR 2 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
30.5 INCH HIGH PRESSURE REMAINS ANCHORED OVER THE
SAINT LAWRENCE VALLEY AND NEW ENGLAND TONIGHT WHILE A 29.2 INCH
LOW LIFTS INTO THE GREAT LAKES FROM NORTHEASTERN IOWA TONIGHT.
THIS LOW SPINS ACROSS LAKE SUPERIOR TONIGHT AT 29.3 INCHES, THEN
LIFTS TO NEAR JAMES BAY THURSDAY AFTERNOON AT 29.4 INCHES. 30.3
INCH RIDGING SHIFTS OVER LAKE SUPERIOR FRIDAY MORNING, THEN
WEAKENS TO 30.0 INCHES SATURDAY. WEAK TROUGHING AT 30.0 INCHES
SETTLES THROUGH THE UPPER GREAT LAKES SATURDAY NIGHT AND
SUNDAY. RIDGING AT 30.1 INCHES MOVES BACK OVER THE REGION MONDAY.
LSZ162-030400-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
359 PM EDT WED APR 2 2025 /259 PM CDT WED APR 2 2025/
...GALE WARNING IN EFFECT UNTIL 11 PM EDT /10 PM CDT/ THIS
EVENING...
LATE THIS AFTERNOON
EAST GALES TO 40 KNOTS. SNOW, POSSIBLY
MIXED WITH RAIN. WAVES 9 TO 12 FEET OCCASIONALLY TO 15 FEET
BUILDING TO 10 TO 14 FEET OCCASIONALLY TO 18 FEET.
TONIGHT
EAST GALES TO 40 KNOTS BECOMING WEST 20 TO 30 KNOTS
AFTER MIDNIGHT. RAIN AND SNOW LIKELY THROUGH MIDNIGHT, THEN A
CHANCE OF SNOW, POSSIBLY MIXED WITH RAIN AFTER MIDNIGHT. WAVES
BUILDING TO 11 TO 15 FEET OCCASIONALLY TO 19 FEET, THEN SUBSIDING
TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET.
THURSDAY
WEST WINDS 20 TO 30 KNOTS DIMINISHING TO 10 TO
20 KNOTS. WAVES SUBSIDING TO 1 TO 3 FEET.
THURSDAY NIGHT
WEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS AFTER MIDNIGHT, THEN VEERING NORTHWEST LATE. WAVES
SUBSIDING TO CALM TO 2 FEET.
FRIDAY
WEST WINDS 5 TO 15 KNOTS BACKING EAST BY MID AFTERNOON.
WAVES CALM TO 2 FEET.
FRIDAY NIGHT
NORTHEAST WINDS 5 TO 15 KNOTS BECOMING NORTH
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
SATURDAY
NORTHWEST WINDS 10 TO 20 KNOTS BACKING WEST BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
SATURDAY NIGHT
WEST WINDS 10 TO 20 KNOTS VEERING NORTHWEST
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
SUNDAY
NORTHWEST WINDS 10 TO 20 KNOTS BECOMING NORTH 15 TO
25 KNOTS. WAVES BUILDING TO 2 TO 4 FEET.
MONDAY
NORTH WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO CALM TO
2 FEET.
LSZ263-030400-
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-
359 PM EDT WED APR 2 2025
..GALE WARNING IN EFFECT UNTIL 11 PM EDT THIS EVENING
...GALE WARNING IN EFFECT FROM 2 AM EDT THURSDAY THROUGH THURSDAY
AFTERNOON...
LATE THIS AFTERNOON
EAST GALES TO 45 KNOTS. SNOW, POSSIBLY
MIXED WITH RAIN. WAVES 12 TO 17 FEET OCCASIONALLY TO 21 FEET
BUILDING TO 15 TO 20 FEET OCCASIONALLY TO 25 FEET.
TONIGHT
EAST GALES TO 45 KNOTS BECOMING SOUTHWEST 20 TO
30 KNOTS AFTER MIDNIGHT, THEN BECOMING WEST GALES TO 35 KNOTS
LATE. SNOW LIKELY THROUGH MIDNIGHT. A CHANCE OF RAIN. A CHANCE OF
SNOW AFTER MIDNIGHT. WAVES SUBSIDING TO 7 TO 10 FEET OCCASIONALLY
TO 13 FEET.
THURSDAY
WEST GALES TO 35 KNOTS DIMINISHING TO 20 TO 30 KNOTS
IN THE AFTERNOON. A SLIGHT CHANCE OF SNOW SHOWERS THROUGH EARLY
AFTERNOON. WAVES SUBSIDING TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET.
THURSDAY NIGHT
WEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS AFTER MIDNIGHT, THEN VEERING NORTHWEST LATE. WAVES
SUBSIDING TO CALM TO 2 FEET.
FRIDAY
SOUTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTH BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
FRIDAY NIGHT
EAST WINDS 5 TO 15 KNOTS BACKING NORTH AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
SATURDAY
NORTHWEST WINDS 5 TO 15 KNOTS BECOMING WEST 10 TO
20 KNOTS BY MID AFTERNOON. WAVES BUILDING TO 1 TO 3 FEET.
SATURDAY NIGHT
WEST WINDS 10 TO 20 KNOTS BECOMING NORTHWEST
5 TO 15 KNOTS AFTER MIDNIGHT. WAVES 1 TO 3 FEET.
SUNDAY
NORTHWEST WINDS 10 TO 20 KNOTS BECOMING NORTH 15 TO
25 KNOTS. A CHANCE OF SNOW SHOWERS. WAVES BUILDING TO 3 TO 6 FEET
OCCASIONALLY TO 8 FEET.
MONDAY
NORTH WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO 1 TO
3 FEET.
LSZ264-030400-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
359 PM EDT WED APR 2 2025
..GALE WARNING IN EFFECT UNTIL 4 PM EDT THIS AFTERNOON
..STORM WARNING IN EFFECT UNTIL 11 PM EDT THIS EVENING
...GALE WARNING IN EFFECT FROM 2 AM EDT THURSDAY THROUGH THURSDAY
AFTERNOON...
LATE THIS AFTERNOON
EAST STORM FORCE WINDS TO 55 KNOTS. SNOW,
POSSIBLY MIXED WITH RAIN. WAVES 15 TO 20 FEET OCCASIONALLY TO
25 FEET.
TONIGHT
EAST GALES TO 45 KNOTS BECOMING SOUTH 20 TO 30 KNOTS
AFTER MIDNIGHT, THEN BECOMING WEST GALES TO 35 KNOTS LATE. SNOW
LIKELY THROUGH MIDNIGHT. A CHANCE OF RAIN. A CHANCE OF SNOW AFTER
MIDNIGHT. WAVES SUBSIDING TO 7 TO 10 FEET OCCASIONALLY TO
13 FEET, THEN BUILDING TO 8 TO 11 FEET OCCASIONALLY TO 14 FEET.
THURSDAY
WEST GALES TO 35 KNOTS DIMINISHING TO 20 TO 30 KNOTS
LATE. A CHANCE OF SNOW SHOWERS, POSSIBLY MIXED WITH RAIN THROUGH
EARLY AFTERNOON. WAVES SUBSIDING TO 5 TO 8 FEET OCCASIONALLY TO
10 FEET.
THURSDAY NIGHT
WEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS AFTER MIDNIGHT, THEN VEERING NORTHWEST LATE. WAVES
SUBSIDING TO CALM TO 2 FEET.
FRIDAY
WEST WINDS 5 TO 15 KNOTS BACKING SOUTH BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
FRIDAY NIGHT
SOUTHEAST WINDS 5 TO 15 KNOTS VEERING NORTHWEST
AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
SATURDAY
NORTHWEST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS BY MID AFTERNOON. WAVES BUILDING TO 1 TO 3 FEET.
SATURDAY NIGHT
NORTHWEST WINDS 10 TO 20 KNOTS DIMINISHING TO
5 TO 15 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 2 TO 4 FEET, THEN
SUBSIDING TO 1 TO 3 FEET.
SUNDAY
NORTHWEST WINDS 10 TO 20 KNOTS BECOMING NORTH 15 TO
25 KNOTS. WAVES BUILDING TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET.
MONDAY
NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS. FREEZING SPRAY. WAVES SUBSIDING TO 2 TO 4 FEET.
LSZ265-030400-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
359 PM EDT WED APR 2 2025
..GALE WARNING IN EFFECT UNTIL 11 PM EDT THIS EVENING
...GALE WARNING IN EFFECT FROM LATE TONIGHT THROUGH THURSDAY
AFTERNOON...
LATE THIS AFTERNOON
SOUTHEAST GALES TO 45 KNOTS. RAIN,
POSSIBLY MIXED WITH SNOW. WAVES 12 TO 17 FEET OCCASIONALLY TO
21 FEET BUILDING TO 15 TO 20 FEET OCCASIONALLY TO 25 FEET.
TONIGHT
SOUTHEAST GALES TO 40 KNOTS BECOMING SOUTH 15 TO
25 KNOTS AFTER MIDNIGHT, THEN BECOMING SOUTHWEST GALES TO
35 KNOTS LATE. A CHANCE OF RAIN THROUGH MIDNIGHT. A SLIGHT CHANCE
OF SNOW AFTER MIDNIGHT. WAVES SUBSIDING TO 4 TO 8 FEET
OCCASIONALLY TO 10 FEET.
THURSDAY
WEST GALES TO 35 KNOTS DIMINISHING TO 15 TO 25 KNOTS
LATE. A SLIGHT CHANCE OF RAIN AND SNOW SHOWERS THROUGH EARLY
AFTERNOON. WAVES SUBSIDING TO 2 TO 4 FEET.
THURSDAY NIGHT
WEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS LATE. WAVES SUBSIDING TO CALM TO 2 FEET.
FRIDAY
WEST WINDS 5 TO 15 KNOTS BACKING EAST BY MID AFTERNOON.
WAVES CALM TO 2 FEET.
FRIDAY NIGHT
SOUTHEAST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
SATURDAY
NORTHWEST WINDS 10 TO 20 KNOTS. WAVES CALM TO 2 FEET.
SATURDAY NIGHT
WEST WINDS 10 TO 20 KNOTS. WAVES CALM TO
2 FEET.
SUNDAY
NORTHWEST WINDS 15 TO 25 KNOTS VEERING NORTH. A CHANCE
OF SNOW SHOWERS. WAVES BUILDING TO 3 TO 5 FEET OCCASIONALLY TO
7 FEET.
MONDAY
NORTH WINDS 15 TO 25 KNOTS. WAVES SUBSIDING TO 1 TO
3 FEET.
LSZ266-030400-
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-
359 PM EDT WED APR 2 2025
..GALE WARNING IN EFFECT UNTIL 4 PM EDT THIS AFTERNOON
..STORM WARNING IN EFFECT UNTIL 11 PM EDT THIS EVENING
...GALE WARNING IN EFFECT FROM LATE TONIGHT THROUGH THURSDAY
AFTERNOON...
LATE THIS AFTERNOON
SOUTHEAST STORM FORCE WINDS TO 55 KNOTS.
RAIN, POSSIBLY MIXED WITH SNOW, FREEZING RAIN LIKELY AND SLEET.
WAVES 15 TO 20 FEET OCCASIONALLY TO 25 FEET.
TONIGHT
SOUTHEAST STORM FORCE WINDS TO 55 KNOTS BECOMING SOUTH
GALES TO 35 KNOTS AFTER MIDNIGHT, THEN VEERING SOUTHWEST LATE.
SNOW LIKELY THROUGH MIDNIGHT. A CHANCE OF RAIN. WAVES SUBSIDING
TO 6 TO 9 FEET OCCASIONALLY TO 11 FEET.
THURSDAY
WEST GALES TO 40 KNOTS DIMINISHING TO 20 TO 30 KNOTS
LATE. A SLIGHT CHANCE OF RAIN AND SNOW SHOWERS THROUGH EARLY
AFTERNOON. WAVES BUILDING TO 10 TO 14 FEET OCCASIONALLY TO
18 FEET, THEN SUBSIDING TO 7 TO 10 FEET OCCASIONALLY TO 13 FEET.
THURSDAY NIGHT
WEST WINDS 10 TO 20 KNOTS VEERING NORTHWEST
AFTER MIDNIGHT, THEN DIMINISHING TO 5 TO 15 KNOTS LATE. WAVES
SUBSIDING TO 1 TO 3 FEET.
FRIDAY
WEST WINDS 5 TO 15 KNOTS BACKING EAST BY MID AFTERNOON.
WAVES SUBSIDING TO CALM TO 2 FEET.
FRIDAY NIGHT
SOUTHEAST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
SATURDAY
NORTHWEST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
SATURDAY NIGHT
NORTHWEST WINDS 10 TO 20 KNOTS. WAVES BUILDING
TO 2 TO 4 FEET.
SUNDAY
NORTHWEST WINDS 15 TO 25 KNOTS VEERING NORTH. WAVES
BUILDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
MONDAY
NORTH WINDS 15 TO 25 KNOTS. WAVES SUBSIDING TO 3 TO
5 FEET OCCASIONALLY TO 7 FEET.
LSZ267-030400-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
359 PM EDT WED APR 2 2025
..GALE WARNING IN EFFECT UNTIL 4 PM EDT THIS AFTERNOON
..STORM WARNING IN EFFECT UNTIL 11 PM EDT THIS EVENING
...GALE WARNING IN EFFECT FROM THURSDAY MORNING THROUGH THURSDAY
AFTERNOON...
LATE THIS AFTERNOON
SOUTHEAST STORM FORCE WINDS TO 55 KNOTS.
FREEZING RAIN, SLEET LIKELY, POSSIBLY MIXED WITH RAIN AND SNOW.
WAVES 10 TO 14 FEET OCCASIONALLY TO 18 FEET BUILDING TO 11 TO
15 FEET OCCASIONALLY TO 19 FEET.
TONIGHT
SOUTHEAST STORM FORCE WINDS TO 55 KNOTS DIMINISHING TO
GALES TO 40 KNOTS AFTER MIDNIGHT, THEN BECOMING SOUTHWEST 20 TO
30 KNOTS LATE. A CHANCE OF RAIN. WAVES BUILDING TO 12 TO 17 FEET
OCCASIONALLY TO 21 FEET, THEN SUBSIDING TO 4 TO 7 FEET
OCCASIONALLY TO 9 FEET.
THURSDAY
WEST GALES TO 40 KNOTS. A SLIGHT CHANCE OF RAIN AND
SNOW SHOWERS THROUGH EARLY AFTERNOON. WAVES BUILDING TO 10 TO
14 FEET OCCASIONALLY TO 18 FEET, THEN SUBSIDING TO 8 TO 11 FEET
OCCASIONALLY TO 14 FEET.
THURSDAY NIGHT
WEST WINDS 15 TO 25 KNOTS BECOMING NORTHWEST
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.
FRIDAY
WEST WINDS 5 TO 15 KNOTS BACKING EAST BY MID AFTERNOON.
WAVES SUBSIDING TO CALM TO 2 FEET.
FRIDAY NIGHT
EAST WINDS 5 TO 15 KNOTS VEERING SOUTHEAST AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
SATURDAY
NORTH WINDS 10 TO 20 KNOTS BACKING NORTHWEST BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
SATURDAY NIGHT
NORTHWEST WINDS 10 TO 20 KNOTS. WAVES BUILDING
TO 2 TO 4 FEET.
SUNDAY
NORTHWEST WINDS 15 TO 25 KNOTS VEERING NORTH. WAVES
BUILDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
MONDAY
NORTH WINDS 15 TO 25 KNOTS. WAVES BUILDING TO 4 TO
7 FEET OCCASIONALLY TO 9 FEET, THEN SUBSIDING TO 3 TO 5 FEET
OCCASIONALLY TO 7 FEET.
LSZ261-030400-
MAFOR 0221/
SUPERIOR WEST...GALE WARNING IN EFFECT...11267 11257 11347 14640
11640. WAVES 10 TO 14 FEET SUBSIDING TO 5 TO 8 FEET TONIGHT.
WAVES 4 TO 7 FEET SUBSIDING TO 3 TO 6 FEET THURSDAY.
SUPERIOR NORTH CENTRAL...STORM WARNING IN EFFECT...11277 11267
11350 11450 13650 11640. A CHANCE OF RAIN OVERNIGHT. A CHANCE OF
SNOW SHOWERS AND RAIN THURSDAY MORNING. WAVES 14 TO 18 FEET
BUILDING TO 15 TO 20 FEET, THEN SUBSIDING TO 10 TO 13 FEET
TONIGHT. WAVES 7 TO 11 FEET THURSDAY.
SUPERIOR SOUTH CENTRAL...STORM WARNING IN EFFECT...11377 11350
11340 11430 11550 13650. WAVES 12 TO 17 FEET SUBSIDING TO 5 TO 9
FEET TONIGHT AND THURSDAY.
SUPERIOR EAST...STORM WARNING IN EFFECT...11377 11376 11360 11440
12550 12650. WAVES 11 TO 15 FEET BUILDING TO 13 TO 17 FEET, THEN
SUBSIDING TO 6 TO 9 FEET TONIGHT. WAVES 5 TO 8 FEET BUILDING TO
10 TO 14 FEET THURSDAY.
JSS
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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