783
FZUS63 KMQT 310201
GLFLS
OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
1000 PM EDT MON MAR 30 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 TROUGH OVER THE SOUTHERN GREAT LAKES WILL MOVE EASTWARD
THROUGH TUESDAY AS HIGH PRESSURE APPROACHES THE UPPER GREAT LAKES.
ON WEDNESDAY MORNING A 30.4 INCH HIGH PRESSURE WILL BE OVER LAKE
SUPERIOR, WITH THE CENTER OF THE HIGH OVER JAMES BAY AT 30.6 INCHES.
BY THURSDAY MORNING, THE HIGH BUILDS TO 30.8 INCHES WHILE A 29.5
INCH LOW DEVELOPS OVER THE CENTRAL PLAINS. THIS LOW PASSES JUST
SOUTH OF LAKE SUPERIOR AT 29.7 INCHES OVERNIGHT INTO FRIDAY MORNING
WHILE ANOTHER LOW OF 29.6 INCHES DEVELOPS OVER THE OKLAHOMA
PANHANDLE. THIS LOW APPROACHES THE BAY OF GREEN BAY SATURDAY
AFTERNOON, TRACKING OVER EASTERN LAKE SUPERIOR AT NEAR 29.4 INCHES
BY SUNDAY MORNING.
LSZ162-310800-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
1000 PM EDT MON MAR 30 2026 /900 PM CDT MON MAR 30 2026/
REST OF TONIGHT
NORTHEAST WINDS 20 TO 30 KNOTS DIMINISHING TO
15 TO 25 KNOTS LATE. A SLIGHT CHANCE OF SNOW SHOWERS BY MIDNIGHT.
A CHANCE OF RAIN SHOWERS. SNOW SHOWERS LIKELY AFTER MIDNIGHT.
WAVES 4 TO 7 FEET OCCASIONALLY TO 9 FEET.
TUESDAY
NORTHEAST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS LATE. A CHANCE OF SNOW SHOWERS, POSSIBLY MIXED WITH
RAIN. WAVES SUBSIDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
TUESDAY NIGHT
NORTHEAST WINDS 10 TO 20 KNOTS. A SLIGHT CHANCE
OF SNOW SHOWERS THROUGH MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.
WEDNESDAY
EAST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS BY MID AFTERNOON. WAVES BUILDING TO 3 TO 5 FEET
OCCASIONALLY TO 7 FEET.
WEDNESDAY NIGHT
EAST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF SNOW SHOWERS. WAVES
BUILDING TO 5 TO 8 FEET OCCASIONALLY TO 10 FEET.
THURSDAY
EAST GALES TO 35 KNOTS BECOMING NORTHEAST GALES TO
45 KNOTS BY MID AFTERNOON. A CHANCE OF SNOW SHOWERS THROUGH EARLY
AFTERNOON, THEN SNOW SHOWERS LIKELY BY MID AFTERNOON. WAVES
BUILDING TO 11 TO 15 FEET OCCASIONALLY TO 19 FEET.
THURSDAY NIGHT
NORTHEAST GALES TO 35 KNOTS DIMINISHING TO
20 TO 30 KNOTS AFTER MIDNIGHT. SNOW SHOWERS. WAVES SUBSIDING TO
7 TO 10 FEET OCCASIONALLY TO 13 FEET.
FRIDAY
NORTHEAST WINDS 15 TO 25 KNOTS BECOMING EAST 20 TO
30 KNOTS. A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO 4 TO
7 FEET OCCASIONALLY TO 9 FEET, THEN BUILDING TO 6 TO 9 FEET
OCCASIONALLY TO 11 FEET.
SATURDAY
NORTHEAST WINDS 20 TO 30 KNOTS BECOMING NORTH 15 TO
25 KNOTS. SNOW SHOWERS LIKELY. A CHANCE OF SNOW SHOWERS. WAVES
SUBSIDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
LSZ263-310800-
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 PM EDT MON MAR 30 2026
REST OF TONIGHT
NORTHEAST WINDS 15 TO 25 KNOTS. A CHANCE OF
SNOW SHOWERS, POSSIBLY MIXED WITH RAIN. WAVES 3 TO 6 FEET
OCCASIONALLY TO 8 FEET BUILDING TO 4 TO 7 FEET OCCASIONALLY TO
9 FEET.
TUESDAY
EAST WINDS 15 TO 25 KNOTS BACKING NORTHEAST IN THE
AFTERNOON, THEN DIMINISHING TO 10 TO 20 KNOTS LATE. A CHANCE OF
SNOW SHOWERS, POSSIBLY MIXED WITH RAIN. WAVES SUBSIDING TO 3 TO
5 FEET OCCASIONALLY TO 7 FEET.
TUESDAY NIGHT
NORTHEAST WINDS 5 TO 15 KNOTS. A SLIGHT CHANCE
OF SNOW SHOWERS THROUGH MIDNIGHT. WAVES SUBSIDING TO 2 TO 4 FEET.
WEDNESDAY
NORTHEAST WINDS 5 TO 15 KNOTS BECOMING EAST 10 TO
20 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO 1 TO 3 FEET, THEN
BUILDING TO 2 TO 4 FEET.
WEDNESDAY NIGHT
EAST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF SNOW SHOWERS AFTER
MIDNIGHT. WAVES BUILDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
THURSDAY
EAST GALES TO 40 KNOTS. A CHANCE OF SNOW SHOWERS
THROUGH EARLY AFTERNOON, THEN SNOW SHOWERS LIKELY BY MID
AFTERNOON. WAVES BUILDING TO 10 TO 14 FEET OCCASIONALLY TO
18 FEET.
THURSDAY NIGHT
NORTHEAST GALES TO 35 KNOTS DIMINISHING TO
20 TO 30 KNOTS AFTER MIDNIGHT. SNOW SHOWERS. WAVES SUBSIDING TO
7 TO 10 FEET OCCASIONALLY TO 13 FEET.
FRIDAY
NORTHEAST WINDS 15 TO 25 KNOTS VEERING EAST. A CHANCE
OF SNOW SHOWERS. WAVES SUBSIDING TO 4 TO 7 FEET OCCASIONALLY TO
9 FEET, THEN BUILDING TO 6 TO 9 FEET OCCASIONALLY TO 11 FEET.
SATURDAY
NORTHEAST WINDS 15 TO 25 KNOTS BACKING NORTH. SNOW
SHOWERS LIKELY. A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO 5 TO
8 FEET OCCASIONALLY TO 10 FEET.
LSZ264-310800-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
1000 PM EDT MON MAR 30 2026
REST OF TONIGHT
NORTHEAST WINDS 10 TO 20 KNOTS BECOMING EAST
15 TO 25 KNOTS LATE. A CHANCE OF SNOW SHOWERS. WAVES 3 TO 6 FEET
OCCASIONALLY TO 8 FEET.
TUESDAY
EAST WINDS 15 TO 25 KNOTS BECOMING NORTHEAST 10 TO
20 KNOTS LATE. SNOW SHOWERS LIKELY THROUGH EARLY AFTERNOON, THEN
A CHANCE OF SNOW SHOWERS BY MID AFTERNOON. WAVES BUILDING TO 4 TO
7 FEET OCCASIONALLY TO 9 FEET, THEN SUBSIDING TO 3 TO 5 FEET
OCCASIONALLY TO 7 FEET.
TUESDAY NIGHT
NORTHEAST WINDS 10 TO 20 KNOTS DIMINISHING TO
5 TO 15 KNOTS LATE. A SLIGHT CHANCE OF SNOW SHOWERS THROUGH
MIDNIGHT. WAVES SUBSIDING TO 2 TO 4 FEET.
WEDNESDAY
NORTHEAST WINDS 10 TO 20 KNOTS BECOMING EAST 5 TO
15 KNOTS BY MID AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
WEDNESDAY NIGHT
EAST WINDS 10 TO 20 KNOTS INCREASING TO 20 TO
30 KNOTS AFTER MIDNIGHT. WAVES BUILDING TO 3 TO 6 FEET
OCCASIONALLY TO 8 FEET.
THURSDAY
EAST GALES TO 35 KNOTS. SNOW SHOWERS LIKELY BY MID
AFTERNOON. WAVES BUILDING TO 8 TO 11 FEET OCCASIONALLY TO
14 FEET.
THURSDAY NIGHT
NORTHEAST GALES TO 35 KNOTS DIMINISHING TO
20 TO 30 KNOTS AFTER MIDNIGHT. SNOW SHOWERS. WAVES BUILDING TO
9 TO 12 FEET OCCASIONALLY TO 15 FEET, THEN SUBSIDING TO 7 TO
10 FEET OCCASIONALLY TO 13 FEET.
FRIDAY
NORTHEAST WINDS 15 TO 25 KNOTS VEERING EAST. A CHANCE
OF SNOW SHOWERS. WAVES SUBSIDING TO 3 TO 6 FEET OCCASIONALLY TO
8 FEET, THEN BUILDING TO 5 TO 8 FEET OCCASIONALLY TO 10 FEET.
SATURDAY
EAST WINDS 20 TO 30 KNOTS BECOMING NORTH 15 TO
25 KNOTS. SNOW SHOWERS LIKELY. A CHANCE OF SNOW SHOWERS. WAVES
5 TO 8 FEET OCCASIONALLY TO 10 FEET.
LSZ265-310800-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
1000 PM EDT MON MAR 30 2026
REST OF TONIGHT
EAST WINDS 15 TO 25 KNOTS. A CHANCE OF SNOW
SHOWERS, POSSIBLY MIXED WITH RAIN. WAVES 2 TO 4 FEET BUILDING TO
3 TO 6 FEET OCCASIONALLY TO 8 FEET.
TUESDAY
EAST WINDS 20 TO 30 KNOTS DIMINISHING TO 15 TO
25 KNOTS IN THE AFTERNOON, THEN BECOMING NORTHEAST 10 TO 20 KNOTS
LATE. SNOW SHOWERS LIKELY THROUGH EARLY AFTERNOON, THEN A CHANCE
OF SNOW SHOWERS BY MID AFTERNOON. WAVES BUILDING TO 4 TO 7 FEET
OCCASIONALLY TO 9 FEET, THEN SUBSIDING TO 3 TO 5 FEET
OCCASIONALLY TO 7 FEET.
TUESDAY NIGHT
NORTH WINDS 10 TO 20 KNOTS VEERING NORTHEAST
LATE. A SLIGHT CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO 2 TO
4 FEET.
WEDNESDAY
NORTHEAST WINDS 15 TO 25 KNOTS BECOMING EAST 10 TO
20 KNOTS BY MID AFTERNOON. WAVES BUILDING TO 3 TO 5 FEET
OCCASIONALLY TO 7 FEET, THEN SUBSIDING TO 1 TO 3 FEET.
WEDNESDAY NIGHT
EAST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF SNOW SHOWERS AFTER
MIDNIGHT. WAVES BUILDING TO 5 TO 8 FEET OCCASIONALLY TO 10 FEET.
THURSDAY
EAST GALES TO 40 KNOTS. FREEZING SPRAY. A CHANCE OF
SNOW SHOWERS THROUGH EARLY AFTERNOON. SNOW SHOWERS LIKELY BY MID
AFTERNOON. WAVES BUILDING TO 10 TO 14 FEET OCCASIONALLY TO
18 FEET.
THURSDAY NIGHT
EAST GALES TO 35 KNOTS BACKING NORTHEAST AFTER
MIDNIGHT. SNOW SHOWERS. WAVES SUBSIDING TO 7 TO 10 FEET
OCCASIONALLY TO 13 FEET.
FRIDAY
NORTH WINDS 20 TO 30 KNOTS VEERING EAST. A CHANCE OF
SNOW SHOWERS. WAVES SUBSIDING TO 3 TO 6 FEET OCCASIONALLY TO
8 FEET, THEN BUILDING TO 5 TO 8 FEET OCCASIONALLY TO 10 FEET.
SATURDAY
EAST GALES TO 35 KNOTS BACKING NORTH. RAIN SHOWERS,
POSSIBLY MIXED WITH FREEZING RAIN. SNOW SHOWERS LIKELY. WAVES
BUILDING TO 5 TO 9 FEET OCCASIONALLY TO 11 FEET.
LSZ266-310800-
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 PM EDT MON MAR 30 2026
REST OF TONIGHT
NORTHEAST WINDS 15 TO 25 KNOTS VEERING EAST
AFTER MIDNIGHT. A SLIGHT CHANCE OF RAIN AND SNOW SHOWERS. WAVES
2 TO 4 FEET BUILDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
TUESDAY
EAST WINDS 15 TO 25 KNOTS BACKING NORTHEAST LATE. SNOW
SHOWERS LIKELY THROUGH EARLY AFTERNOON, THEN A CHANCE OF SNOW
SHOWERS BY MID AFTERNOON. WAVES BUILDING TO 4 TO 7 FEET
OCCASIONALLY TO 9 FEET, THEN SUBSIDING TO 3 TO 5 FEET
OCCASIONALLY TO 7 FEET.
TUESDAY NIGHT
NORTHEAST WINDS 15 TO 25 KNOTS. A SLIGHT CHANCE
OF SNOW SHOWERS THROUGH MIDNIGHT. WAVES SUBSIDING TO 2 TO 4 FEET.
WEDNESDAY
NORTHEAST WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS BY MID AFTERNOON. WAVES BUILDING TO 3 TO 5 FEET
OCCASIONALLY TO 7 FEET, THEN SUBSIDING TO 1 TO 3 FEET.
WEDNESDAY NIGHT
EAST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF SNOW SHOWERS AFTER
MIDNIGHT. WAVES BUILDING TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET.
THURSDAY
EAST GALES TO 40 KNOTS. FREEZING SPRAY THROUGH EARLY
AFTERNOON. A CHANCE OF SNOW SHOWERS THROUGH EARLY AFTERNOON, THEN
SNOW SHOWERS LIKELY BY MID AFTERNOON. WAVES BUILDING TO 10 TO
14 FEET OCCASIONALLY TO 18 FEET.
THURSDAY NIGHT
EAST GALES TO 35 KNOTS BECOMING NORTHEAST 20 TO
30 KNOTS AFTER MIDNIGHT. SNOW SHOWERS. RAIN SHOWERS LIKELY AFTER
MIDNIGHT. WAVES SUBSIDING TO 7 TO 10 FEET OCCASIONALLY TO
13 FEET.
FRIDAY
NORTH WINDS 20 TO 30 KNOTS VEERING EAST. A CHANCE OF
SNOW SHOWERS, POSSIBLY MIXED WITH RAIN. A CHANCE OF FREEZING
RAIN. WAVES SUBSIDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET, THEN
BUILDING TO 5 TO 8 FEET OCCASIONALLY TO 10 FEET.
SATURDAY
EAST WINDS 20 TO 30 KNOTS BACKING NORTH. SNOW
SHOWERS, POSSIBLY MIXED WITH FREEZING RAIN. RAIN SHOWERS LIKELY.
A CHANCE OF SNOW SHOWERS. WAVES BUILDING TO 5 TO 9 FEET
OCCASIONALLY TO 11 FEET.
LSZ267-310800-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
1000 PM EDT MON MAR 30 2026
REST OF TONIGHT
NORTHEAST WINDS 15 TO 25 KNOTS VEERING EAST
AFTER MIDNIGHT. A CHANCE OF RAIN SHOWERS, POSSIBLY MIXED WITH
SNOW. WAVES 1 TO 3 FEET BUILDING TO 3 TO 5 FEET OCCASIONALLY TO
7 FEET.
TUESDAY
EAST WINDS 15 TO 25 KNOTS BACKING NORTHEAST LATE. A
CHANCE OF SNOW SHOWERS THROUGH EARLY AFTERNOON. A SLIGHT CHANCE
OF RAIN SHOWERS. SNOW SHOWERS LIKELY, POSSIBLY MIXED WITH SLEET
BY MID AFTERNOON. WAVES BUILDING TO 3 TO 6 FEET OCCASIONALLY TO
8 FEET, THEN SUBSIDING TO 2 TO 4 FEET.
TUESDAY NIGHT
NORTHEAST WINDS 10 TO 20 KNOTS INCREASING TO
15 TO 25 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF SNOW SHOWERS
THROUGH MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET, THEN BUILDING
TO 2 TO 4 FEET.
WEDNESDAY
NORTHEAST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO
CALM TO 2 FEET.
WEDNESDAY NIGHT
EAST WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF SNOW SHOWERS AFTER
MIDNIGHT. WAVES BUILDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
THURSDAY
EAST GALES TO 40 KNOTS. FREEZING SPRAY THROUGH EARLY
AFTERNOON. A CHANCE OF SNOW SHOWERS THROUGH EARLY AFTERNOON, THEN
SNOW SHOWERS BY MID AFTERNOON. WAVES BUILDING TO 6 TO 9 FEET
OCCASIONALLY TO 11 FEET.
THURSDAY NIGHT
EAST GALES TO 35 KNOTS BECOMING NORTHEAST 20 TO
30 KNOTS AFTER MIDNIGHT. RAIN AND SNOW SHOWERS, POSSIBLY MIXED
WITH FREEZING RAIN. WAVES SUBSIDING TO 4 TO 7 FEET OCCASIONALLY
TO 9 FEET.
FRIDAY
NORTH WINDS 15 TO 25 KNOTS VEERING EAST. A CHANCE OF
RAIN AND SNOW SHOWERS. A CHANCE OF FREEZING RAIN. WAVES SUBSIDING
TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
SATURDAY
EAST WINDS 20 TO 30 KNOTS BACKING NORTH. SNOW
SHOWERS, POSSIBLY MIXED WITH FREEZING RAIN. RAIN SHOWERS LIKELY.
A CHANCE OF SNOW SHOWERS. WAVES BUILDING TO 5 TO 8 FEET
OCCASIONALLY TO 10 FEET.
LSZ261-310800-
MAFOR 3103/
SUPERIOR WEST 11140 11130 12137 12130 11120 11110. WAVES 4 TO 7
FEET OVERNIGHT AND TUESDAY. WAVES 3 TO 5 FEET TUESDAY EVENING.
SUPERIOR NORTH CENTRAL 11130 11230 11237 12247 11230 12120. WAVES
2 TO 4 FEET BUILDING TO 3 TO 5 FEET OVERNIGHT. WAVES 3 TO 6 FEET
TUESDAY AND TUESDAY EVENING.
SUPERIOR SOUTH CENTRAL 13230 12237 11220 11120 11810. A CHANCE OF
LIGHT FREEZING RAIN TUESDAY MORNING. WAVES 2 TO 4 FEET BUILDING
TO 3 TO 6 FEET OVERNIGHT. WAVES 4 TO 7 FEET TUESDAY. WAVES 3 TO 5
FEET TUESDAY EVENING.
SUPERIOR EAST 11120 11130 11230 11240 11247 11230 11130 11120. A
CHANCE OF RAIN SHOWERS LATE THIS EVENING. A CHANCE OF LIGHT
FREEZING RAIN TUESDAY MORNING, THEN A CHANCE OF LIGHT SLEET
TUESDAY AFTERNOON. WAVES 2 TO 4 FEET BUILDING TO 3 TO 5 FEET
OVERNIGHT. WAVES 3 TO 6 FEET TUESDAY. WAVES 3 TO 5 FEET SUBSIDING
TO 2 TO 4 FEET TUESDAY EVENING.
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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