238
FZUS63 KMQT 291401
GLFLS
OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
1000 AM EDT SUN MAR 29 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
A 29.8 INCH LOW OVER THE CENTRAL PLAINS THIS MORNING LIFTS A 30.0
INCH TROUGH OVER LAKE SUPERIOR BY THIS AFTERNOON. THIS TROUGH
LINGERS OVER THE GREAT LAKES AND SLOWLY DEEPENS WITH TIME EARLY THIS
WEEK BEFORE THE LOW PUSHES THROUGH AT 29.6 INCHES ON TUESDAY. AS THE
LOW TRACKS ALONG THE ST. LAWRENCE SEAWAY TUESDAY NIGHT, 30.3 INCH
HIGH PRESSURE BUILDS OVER THE NORTHERN PLAINS, GRADUALLY BUILDING
PRESSURE OVER NORTHERN ONTARIO TO 30.6 INCHES BY WEDNESDAY. BY
THURSDAY, THE HIGH BUILDS TO 30.8 INCHES OVER NORTHERN QUEBEC WHILE
A WEAK 29.9 INCH LOW PASSES OVER THE SOUTHERN GREAT LAKES BASIN AND
A 29.3 INCH LOW PRESSURE ORGANIZES IN THE LEE OF THE ROCKIES.
LSZ162-292000-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
1000 AM EDT SUN MAR 29 2026 /900 AM CDT SUN MAR 29 2026/
REST OF TODAY
NORTHEAST WINDS 5 TO 15 KNOTS INCREASING TO
10 TO 20 KNOTS LATE. WAVES 1 TO 3 FEET.
TONIGHT
NORTHEAST WINDS 5 TO 15 KNOTS. WAVES SUBSIDING TO CALM
TO 2 FEET.
MONDAY
NORTHEAST WINDS 10 TO 20 KNOTS BECOMING EAST 15 TO
25 KNOTS IN THE AFTERNOON, THEN BECOMING NORTHEAST 20 TO 30 KNOTS
LATE. A SLIGHT CHANCE OF RAIN AND SNOW SHOWERS, POSSIBLY MIXED
WITH FREEZING RAIN BY MID AFTERNOON. WAVES BUILDING TO 3 TO
6 FEET OCCASIONALLY TO 8 FEET.
MONDAY NIGHT
NORTHEAST WINDS 20 TO 30 KNOTS DIMINISHING TO
15 TO 25 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW SHOWERS, POSSIBLY
MIXED WITH RAIN. A CHANCE OF FREEZING RAIN AFTER MIDNIGHT. WAVES
BUILDING TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET.
TUESDAY
NORTHEAST WINDS 15 TO 25 KNOTS. A CHANCE OF SNOW
SHOWERS. WAVES BUILDING TO 5 TO 8 FEET OCCASIONALLY TO 10 FEET,
THEN SUBSIDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
TUESDAY NIGHT
NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.
WEDNESDAY
EAST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO CALM
TO 2 FEET, THEN BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
THURSDAY
EAST WINDS 20 TO 30 KNOTS. A CHANCE OF SNOW SHOWERS.
WAVES BUILDING TO 5 TO 9 FEET OCCASIONALLY TO 11 FEET.
LSZ263-292000-
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-
1000 AM EDT SUN MAR 29 2026
REST OF TODAY
EAST WINDS 5 TO 15 KNOTS BACKING NORTHEAST LATE.
WAVES 1 TO 3 FEET.
TONIGHT
NORTHEAST WINDS 5 TO 15 KNOTS. WAVES SUBSIDING TO CALM
TO 2 FEET.
MONDAY
NORTHEAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS IN THE AFTERNOON, THEN BECOMING EAST 15 TO 25 KNOTS
LATE. A SLIGHT CHANCE OF RAIN SHOWERS, FREEZING RAIN AND SNOW
SHOWERS BY MID AFTERNOON. WAVES BUILDING TO 3 TO 6 FEET
OCCASIONALLY TO 8 FEET.
MONDAY NIGHT
EAST WINDS 20 TO 30 KNOTS BECOMING NORTHEAST
15 TO 25 KNOTS AFTER MIDNIGHT. A CHANCE OF RAIN AND SNOW SHOWERS,
POSSIBLY MIXED WITH FREEZING RAIN. WAVES BUILDING TO 4 TO 7 FEET
OCCASIONALLY TO 9 FEET, THEN SUBSIDING TO 3 TO 6 FEET
OCCASIONALLY TO 8 FEET.
TUESDAY
NORTHEAST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS BY MID AFTERNOON. A CHANCE OF RAIN SHOWERS THROUGH EARLY
AFTERNOON. A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO 3 TO
6 FEET OCCASIONALLY TO 8 FEET.
TUESDAY NIGHT
NORTH WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO
2 TO 4 FEET.
WEDNESDAY
NORTHEAST WINDS 5 TO 15 KNOTS BECOMING EAST 10 TO
20 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET, THEN BUILDING TO
3 TO 5 FEET OCCASIONALLY TO 7 FEET.
THURSDAY
EAST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS. A CHANCE OF SNOW SHOWERS. WAVES BUILDING TO 6 TO 9 FEET
OCCASIONALLY TO 11 FEET.
LSZ264-292000-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
1000 AM EDT SUN MAR 29 2026
REST OF TODAY
EAST WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
TONIGHT
EAST WINDS 5 TO 15 KNOTS BACKING NORTH LATE. WAVES
CALM TO 2 FEET.
MONDAY
NORTHEAST WINDS 5 TO 15 KNOTS BECOMING EAST 10 TO
20 KNOTS LATE. WAVES BUILDING TO 1 TO 3 FEET.
MONDAY NIGHT
EAST WINDS 15 TO 25 KNOTS. A CHANCE OF SNOW
SHOWERS, POSSIBLY MIXED WITH RAIN AND FREEZING RAIN. WAVES
BUILDING TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET.
TUESDAY
NORTHEAST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS BY MID AFTERNOON. FREEZING SPRAY THROUGH EARLY
AFTERNOON. A CHANCE OF SNOW SHOWERS. WAVES BUILDING TO 5 TO
8 FEET OCCASIONALLY TO 10 FEET, THEN SUBSIDING TO 3 TO 6 FEET
OCCASIONALLY TO 8 FEET.
TUESDAY NIGHT
NORTH WINDS 15 TO 25 KNOTS. FREEZING SPRAY.
WAVES SUBSIDING TO 2 TO 4 FEET.
WEDNESDAY
NORTH WINDS 10 TO 20 KNOTS BECOMING EAST 15 TO
25 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET, THEN BUILDING TO
2 TO 4 FEET.
THURSDAY
EAST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS. WAVES BUILDING TO 6 TO 9 FEET OCCASIONALLY TO 11 FEET.
LSZ265-292000-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
1000 AM EDT SUN MAR 29 2026
REST OF TODAY
EAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS LATE. WAVES CALM TO 2 FEET.
TONIGHT
EAST WINDS 10 TO 20 KNOTS BACKING NORTH AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
MONDAY
NORTHEAST WINDS 10 TO 20 KNOTS VEERING EAST LATE. WAVES
BUILDING TO 1 TO 3 FEET.
MONDAY NIGHT
EAST WINDS 15 TO 25 KNOTS. A CHANCE OF RAIN
SHOWERS, POSSIBLY MIXED WITH SNOW. WAVES BUILDING TO 4 TO 7 FEET
OCCASIONALLY TO 9 FEET.
TUESDAY
EAST WINDS 20 TO 30 KNOTS BECOMING NORTHEAST 15 TO
25 KNOTS BY MID AFTERNOON. A CHANCE OF RAIN SHOWERS THROUGH EARLY
AFTERNOON. A CHANCE OF SNOW SHOWERS. WAVES BUILDING TO 5 TO
8 FEET OCCASIONALLY TO 10 FEET, THEN SUBSIDING TO 3 TO 6 FEET
OCCASIONALLY TO 8 FEET.
TUESDAY NIGHT
NORTH WINDS 20 TO 30 KNOTS. FREEZING SPRAY AFTER
MIDNIGHT. WAVES 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
WEDNESDAY
NORTH WINDS 10 TO 20 KNOTS BECOMING EAST 15 TO
25 KNOTS. FREEZING SPRAY. WAVES SUBSIDING TO CALM TO 2 FEET, THEN
BUILDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
THURSDAY
EAST WINDS 20 TO 30 KNOTS. FREEZING SPRAY. A CHANCE
OF SNOW SHOWERS. WAVES BUILDING TO 7 TO 10 FEET OCCASIONALLY TO
13 FEET.
LSZ266-292000-
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-
1000 AM EDT SUN MAR 29 2026
REST OF TODAY
EAST WINDS 5 TO 15 KNOTS BECOMING SOUTHEAST
10 TO 20 KNOTS LATE. WAVES CALM TO 2 FEET.
TONIGHT
SOUTHEAST WINDS 10 TO 20 KNOTS BACKING NORTH AFTER
MIDNIGHT. WAVES CALM TO 2 FEET.
MONDAY
NORTHEAST WINDS 10 TO 20 KNOTS. WAVES BUILDING TO 1 TO
3 FEET, THEN SUBSIDING TO CALM TO 2 FEET.
MONDAY NIGHT
EAST WINDS 15 TO 25 KNOTS. A CHANCE OF RAIN
SHOWERS, POSSIBLY MIXED WITH SNOW. WAVES BUILDING TO 4 TO 7 FEET
OCCASIONALLY TO 9 FEET.
TUESDAY
EAST WINDS 20 TO 30 KNOTS BACKING NORTHEAST BY MID
AFTERNOON. RAIN SHOWERS LIKELY THROUGH EARLY AFTERNOON. A CHANCE
OF SNOW SHOWERS. A CHANCE OF RAIN SHOWERS BY MID AFTERNOON. WAVES
BUILDING TO 5 TO 8 FEET OCCASIONALLY TO 10 FEET, THEN SUBSIDING
TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
TUESDAY NIGHT
NORTH WINDS 20 TO 30 KNOTS. FREEZING SPRAY AFTER
MIDNIGHT. WAVES 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
WEDNESDAY
NORTH WINDS 15 TO 25 KNOTS VEERING EAST. FREEZING
SPRAY. WAVES SUBSIDING TO CALM TO 2 FEET, THEN BUILDING TO 3 TO
6 FEET OCCASIONALLY TO 8 FEET.
THURSDAY
EAST WINDS 20 TO 30 KNOTS. WAVES BUILDING TO 7 TO
10 FEET OCCASIONALLY TO 13 FEET.
LSZ267-292000-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
1000 AM EDT SUN MAR 29 2026
REST OF TODAY
SOUTHEAST WINDS 5 TO 15 KNOTS BACKING EAST IN
THE AFTERNOON, THEN BECOMING SOUTHEAST 10 TO 20 KNOTS LATE. WAVES
CALM TO 2 FEET.
TONIGHT
SOUTHEAST WINDS 10 TO 20 KNOTS VEERING SOUTH AFTER
MIDNIGHT, THEN BACKING NORTH LATE. WAVES CALM TO 2 FEET.
MONDAY
NORTH WINDS 10 TO 20 KNOTS BECOMING NORTHEAST 5 TO
15 KNOTS IN THE AFTERNOON, THEN INCREASING TO 10 TO 20 KNOTS
LATE. WAVES CALM TO 2 FEET.
MONDAY NIGHT
EAST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS AFTER MIDNIGHT. RAIN SHOWERS LIKELY THROUGH MIDNIGHT. A
CHANCE OF SNOW SHOWERS. A CHANCE OF RAIN SHOWERS AFTER MIDNIGHT.
WAVES BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
TUESDAY
EAST WINDS 15 TO 25 KNOTS BACKING NORTHEAST BY MID
AFTERNOON. RAIN AND SNOW SHOWERS LIKELY THROUGH EARLY AFTERNOON,
THEN A CHANCE OF RAIN SHOWERS, POSSIBLY MIXED WITH FREEZING RAIN
AND SNOW SHOWERS BY MID AFTERNOON. WAVES 3 TO 5 FEET OCCASIONALLY
TO 7 FEET.
TUESDAY NIGHT
NORTH WINDS 20 TO 30 KNOTS. FREEZING SPRAY AFTER
MIDNIGHT. WAVES 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
WEDNESDAY
NORTH WINDS 15 TO 25 KNOTS VEERING EAST. WAVES
SUBSIDING TO CALM TO 2 FEET, THEN BUILDING TO 2 TO 4 FEET.
THURSDAY
EAST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS. A CHANCE OF SNOW SHOWERS. WAVES BUILDING TO 3 TO 5 FEET
OCCASIONALLY TO 7 FEET, THEN SUBSIDING TO 2 TO 4 FEET.
LSZ261-292000-
MAFOR 2915/
SUPERIOR WEST 11220 11120 15110. WAVES 1 TO 3 FEET.
SUPERIOR NORTH CENTRAL 13210 11200 11100 11810 12110. WAVES 2
FEET OR LESS.
SUPERIOR SOUTH CENTRAL 11200 11210 12310 11210 13810. WAVES 2
FEET OR LESS THIS AFTERNOON AND TONIGHT. WAVES 1 TO 3 FEET MONDAY
MORNING.
SUPERIOR EAST 11200 11210 13310 11210 11810 11110. WAVES 1 TO 2
FEET. WAVE HEIGHTS ARE FOR ICE FREE AREAS.
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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