817
FZUS63 KMQT 101442
GLFLS
OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
1041 AM EDT TUE MAR 10 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 30.1 INCH HIGH OVER ONTARIO THIS MORNING WILL BUILD TO 30.3
INCHES, WITH A 30.1 INCH RIDGE EXTENDING OVER LAKE SUPERIOR TODAY
THROUGH THIS EVENING. THE HIGH MOVES INTO QUEBEC TONIGHT AS 29.6 LOW
PRESSURE MOVES INTO THE LOWER MIDWEST. THIS LOW MOVES THROUGH THE
LOWER GREAT LAKES WEDNESDAY AT 29.4 INCHES. THURSDAY, LAKE SUPERIOR
WILL BE SITUATED BETWEEN A 29.3 INCH LOW OVER SOUTHERN QUEBEC, A
29.4 INCH LOW OVER NORTH DAKOTA, A 30.3 INCH HIGH OVER THE LOWER
MISSISSIPPI RIVER VALLEY, AND A 30.1 INCH RIDGE OVER HUDSON BAY. THE
DAKOTAS LOW ARRIVES NEAR THE LAKE FRIDAY MORNING AT NEAR 29.4
INCHES, THEN MOVES INTO SOUTHERN QUEBEC FRIDAY NIGHT. A 30.2 INCH
RIDGE WILL THEN FOLLOW ACROSS THE UPPER GREAT LAKES SATURDAY, AHEAD
OF AN APPROACHING 29.5 INCH LOW THAT DEEPENS TO 29.3 INCHES OVER
SOUTHERN MICHIGAN SUNDAY EVENING.
LSZ162-102000-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
1041 AM EDT TUE MAR 10 2026 /941 AM CDT TUE MAR 10 2026/
REST OF TODAY
EAST WINDS 15 TO 25 KNOTS INCREASING TO 20 TO
30 KNOTS LATE. A SLIGHT CHANCE OF SNOW BY MID AFTERNOON. WAVES
2 TO 4 FEET BUILDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
TONIGHT
EAST WINDS 15 TO 25 KNOTS BACKING NORTHEAST AFTER
MIDNIGHT, THEN DIMINISHING TO 10 TO 20 KNOTS LATE. A CHANCE OF
SNOW. WAVES SUBSIDING TO 2 TO 4 FEET.
WEDNESDAY
NORTH WINDS 10 TO 20 KNOTS BACKING NORTHWEST LATE. A
SLIGHT CHANCE OF SNOW THROUGH EARLY AFTERNOON. WAVES SUBSIDING TO
CALM TO 2 FEET.
WEDNESDAY NIGHT
NORTHWEST WINDS 5 TO 15 KNOTS. WAVES CALM TO
2 FEET.
THURSDAY
WEST WINDS 5 TO 15 KNOTS BECOMING EAST 10 TO 20 KNOTS
BY MID AFTERNOON. A SLIGHT CHANCE OF SNOW SHOWERS, POSSIBLY MIXED
WITH RAIN BY MID AFTERNOON. WAVES CALM TO 2 FEET.
THURSDAY NIGHT
EAST WINDS 20 TO 30 KNOTS BACKING NORTHEAST
AFTER MIDNIGHT. SNOW SHOWERS LIKELY. WAVES BUILDING TO 5 TO
8 FEET OCCASIONALLY TO 10 FEET.
FRIDAY
NORTHWEST WINDS 20 TO 30 KNOTS DIMINISHING TO 5 TO
15 KNOTS. A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO CALM TO
2 FEET.
SATURDAY
EAST WINDS 5 TO 15 KNOTS BECOMING NORTHEAST GALES TO
35 KNOTS. A CHANCE OF SNOW SHOWERS. FREEZING SPRAY. WAVES
BUILDING TO 6 TO 9 FEET OCCASIONALLY TO 11 FEET.
LSZ263-102000-
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-
1041 AM EDT TUE MAR 10 2026
REST OF TODAY
NORTHEAST WINDS 10 TO 20 KNOTS VEERING EAST IN
THE AFTERNOON. A SLIGHT CHANCE OF SNOW BY MID AFTERNOON. WAVES
2 TO 4 FEET BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
TONIGHT
EAST WINDS TO 30 KNOTS WITH A FEW GALE FORCE GUSTS TO
35 KNOTS POSSIBLE BACKING NORTHEAST LATE. A CHANCE OF SNOW. WAVES
SUBSIDING TO 2 TO 4 FEET.
WEDNESDAY
NORTHEAST WINDS TO 30 KNOTS WITH A FEW GALE FORCE
GUSTS TO 35 KNOTS POSSIBLE BECOMING NORTH 20 TO 30 KNOTS IN THE
AFTERNOON, THEN DIMINISHING TO 10 TO 20 KNOTS LATE. A CHANCE OF
SNOW THROUGH EARLY AFTERNOON. WAVES BUILDING TO 3 TO 5 FEET
OCCASIONALLY TO 7 FEET, THEN SUBSIDING TO 2 TO 4 FEET.
WEDNESDAY NIGHT
NORTH WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
THURSDAY
NORTH WINDS 5 TO 15 KNOTS BECOMING EAST 10 TO
20 KNOTS BY MID AFTERNOON. A SLIGHT CHANCE OF SNOW SHOWERS BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
THURSDAY NIGHT
EAST WINDS 20 TO 30 KNOTS INCREASING TO GALES
TO 35 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW SHOWERS. FREEZING
SPRAY AFTER MIDNIGHT. WAVES BUILDING TO 7 TO 10 FEET OCCASIONALLY
TO 13 FEET.
FRIDAY
NORTH WINDS 20 TO 30 KNOTS BECOMING NORTHWEST 10 TO
20 KNOTS. FREEZING SPRAY. A CHANCE OF SNOW SHOWERS. WAVES
SUBSIDING TO 1 TO 3 FEET.
SATURDAY
SOUTHEAST WINDS 5 TO 15 KNOTS BECOMING EAST GALES TO
35 KNOTS. A CHANCE OF SNOW SHOWERS. FREEZING SPRAY. WAVES
SUBSIDING TO CALM TO 2 FEET, THEN BUILDING TO 9 TO 12 FEET
OCCASIONALLY TO 15 FEET.
LSZ264-102000-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
1041 AM EDT TUE MAR 10 2026
REST OF TODAY
NORTHEAST WINDS 5 TO 15 KNOTS INCREASING TO
10 TO 20 KNOTS IN THE AFTERNOON, THEN VEERING EAST LATE. WAVES
1 TO 3 FEET.
TONIGHT
EAST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO 15 KNOTS
LATE. A CHANCE OF SNOW. WAVES BUILDING TO 3 TO 5 FEET
OCCASIONALLY TO 7 FEET.
WEDNESDAY
NORTHEAST WINDS 10 TO 20 KNOTS BACKING NORTH IN THE
AFTERNOON, THEN INCREASING TO 15 TO 25 KNOTS LATE. A CHANCE OF
SNOW THROUGH EARLY AFTERNOON. WAVES BUILDING TO 3 TO 6 FEET
OCCASIONALLY TO 8 FEET.
WEDNESDAY NIGHT
NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO
10 TO 20 KNOTS AFTER MIDNIGHT. WAVES SUBSIDING TO 1 TO 3 FEET.
THURSDAY
NORTH WINDS 5 TO 15 KNOTS VEERING EAST BY MID
AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
THURSDAY NIGHT
SOUTHEAST GALES TO 35 KNOTS BECOMING EAST GALES
TO 40 KNOTS AFTER MIDNIGHT. FREEZING SPRAY. A CHANCE OF SNOW
SHOWERS. WAVES BUILDING TO 9 TO 12 FEET OCCASIONALLY TO 15 FEET.
FRIDAY
NORTH GALES TO 35 KNOTS BECOMING NORTHWEST 15 TO
25 KNOTS. A CHANCE OF SNOW SHOWERS. FREEZING SPRAY. WAVES
SUBSIDING TO 2 TO 4 FEET.
SATURDAY
SOUTHEAST WINDS 5 TO 15 KNOTS BECOMING EAST GALES TO
35 KNOTS. A CHANCE OF SNOW SHOWERS. FREEZING SPRAY. WAVES
SUBSIDING TO 1 TO 3 FEET, THEN BUILDING TO 9 TO 12 FEET
OCCASIONALLY TO 15 FEET.
LSZ265-102000-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
1041 AM EDT TUE MAR 10 2026
REST OF TODAY
NORTHEAST WINDS 10 TO 20 KNOTS INCREASING TO
15 TO 25 KNOTS IN THE AFTERNOON, THEN VEERING EAST LATE. A SLIGHT
CHANCE OF SNOW BY MID AFTERNOON. WAVES 2 TO 4 FEET.
TONIGHT
EAST WINDS 15 TO 25 KNOTS. A CHANCE OF SNOW THROUGH
MIDNIGHT, THEN SNOW LIKELY AFTER MIDNIGHT. WAVES BUILDING TO 3 TO
6 FEET OCCASIONALLY TO 8 FEET.
WEDNESDAY
NORTHEAST WINDS 15 TO 25 KNOTS BECOMING NORTH 20 TO
30 KNOTS IN THE AFTERNOON. SNOW LIKELY THROUGH EARLY AFTERNOON,
THEN A SLIGHT CHANCE OF SNOW BY MID AFTERNOON. FREEZING SPRAY BY
MID AFTERNOON. WAVES BUILDING TO 6 TO 9 FEET OCCASIONALLY TO
11 FEET.
WEDNESDAY NIGHT
NORTH WINDS 20 TO 30 KNOTS BECOMING NORTHWEST
10 TO 20 KNOTS AFTER MIDNIGHT. FREEZING SPRAY THROUGH MIDNIGHT.
WAVES SUBSIDING TO 2 TO 4 FEET.
THURSDAY
NORTHWEST WINDS 10 TO 20 KNOTS VEERING EAST BY MID
AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
THURSDAY NIGHT
SOUTHEAST GALES TO 35 KNOTS BECOMING EAST GALES
TO 45 KNOTS AFTER MIDNIGHT. FREEZING SPRAY. A CHANCE OF SNOW
SHOWERS. WAVES BUILDING TO 9 TO 12 FEET OCCASIONALLY TO 15 FEET.
FRIDAY
NORTH GALES TO 45 KNOTS BECOMING NORTHWEST 15 TO
25 KNOTS. FREEZING SPRAY. A CHANCE OF SNOW SHOWERS. WAVES
BUILDING TO 10 TO 14 FEET OCCASIONALLY TO 18 FEET, THEN SUBSIDING
TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
SATURDAY
SOUTHEAST WINDS 15 TO 25 KNOTS INCREASING TO GALES TO
35 KNOTS. A CHANCE OF SNOW SHOWERS. FREEZING SPRAY. WAVES
SUBSIDING TO 1 TO 3 FEET, THEN BUILDING TO 8 TO 11 FEET
OCCASIONALLY TO 14 FEET.
LSZ266-102000-
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-
1041 AM EDT TUE MAR 10 2026
REST OF TODAY
NORTHEAST WINDS 15 TO 25 KNOTS. A SLIGHT CHANCE
OF SNOW BY MID AFTERNOON. WAVES 2 TO 4 FEET BUILDING TO 3 TO
5 FEET OCCASIONALLY TO 7 FEET.
TONIGHT
EAST WINDS 15 TO 25 KNOTS. A CHANCE OF SNOW THROUGH
MIDNIGHT, THEN SNOW LIKELY AFTER MIDNIGHT. WAVES BUILDING TO 3 TO
6 FEET OCCASIONALLY TO 8 FEET.
WEDNESDAY
NORTHEAST WINDS 15 TO 25 KNOTS BECOMING NORTH 20 TO
30 KNOTS IN THE AFTERNOON. SNOW LIKELY THROUGH EARLY AFTERNOON,
THEN A CHANCE OF SNOW BY MID AFTERNOON. FREEZING SPRAY BY MID
AFTERNOON. WAVES BUILDING TO 7 TO 10 FEET OCCASIONALLY TO
13 FEET.
WEDNESDAY NIGHT
NORTH WINDS 20 TO 30 KNOTS DIMINISHING TO
15 TO 25 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF SNOW SHOWERS
THROUGH MIDNIGHT. FREEZING SPRAY. WAVES SUBSIDING TO 3 TO 6 FEET
OCCASIONALLY TO 8 FEET.
THURSDAY
NORTH WINDS 10 TO 20 KNOTS VEERING EAST BY MID
AFTERNOON. WAVES SUBSIDING TO CALM TO 2 FEET.
THURSDAY NIGHT
SOUTHEAST GALES TO 45 KNOTS. FREEZING SPRAY. A
CHANCE OF SNOW SHOWERS. WAVES BUILDING TO 9 TO 12 FEET
OCCASIONALLY TO 15 FEET.
FRIDAY
NORTH GALES TO 45 KNOTS BECOMING NORTHWEST 20 TO
30 KNOTS. FREEZING SPRAY. A CHANCE OF SNOW SHOWERS. WAVES
BUILDING TO 10 TO 14 FEET OCCASIONALLY TO 18 FEET, THEN SUBSIDING
TO 5 TO 8 FEET OCCASIONALLY TO 10 FEET.
SATURDAY
SOUTHEAST WINDS 15 TO 25 KNOTS INCREASING TO GALES TO
35 KNOTS. A CHANCE OF SNOW SHOWERS. FREEZING SPRAY. WAVES
SUBSIDING TO 1 TO 3 FEET, THEN BUILDING TO 8 TO 11 FEET
OCCASIONALLY TO 14 FEET.
LSZ267-102000-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
1041 AM EDT TUE MAR 10 2026
REST OF TODAY
NORTHEAST WINDS 10 TO 20 KNOTS. A SLIGHT CHANCE
OF SNOW BY MID AFTERNOON. WAVES 1 TO 3 FEET BUILDING TO 2 TO
4 FEET.
TONIGHT
EAST WINDS 15 TO 25 KNOTS. A CHANCE OF SNOW THROUGH
MIDNIGHT, THEN SNOW LIKELY AFTER MIDNIGHT. WAVES 2 TO 4 FEET.
WEDNESDAY
NORTHEAST WINDS 15 TO 25 KNOTS BECOMING NORTH 20 TO
30 KNOTS LATE. SNOW LIKELY THROUGH EARLY AFTERNOON, THEN A CHANCE
OF SNOW BY MID AFTERNOON. FREEZING SPRAY BY MID AFTERNOON. WAVES
BUILDING TO 5 TO 8 FEET OCCASIONALLY TO 10 FEET.
WEDNESDAY NIGHT
NORTH WINDS 20 TO 30 KNOTS DIMINISHING TO
15 TO 25 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF SNOW SHOWERS
THROUGH MIDNIGHT. FREEZING SPRAY. WAVES SUBSIDING TO 3 TO 5 FEET
OCCASIONALLY TO 7 FEET.
THURSDAY
NORTH WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO CALM
TO 2 FEET.
THURSDAY NIGHT
SOUTHEAST WINDS 20 TO 30 KNOTS INCREASING TO
GALES TO 45 KNOTS AFTER MIDNIGHT. HEAVY FREEZING SPRAY. A CHANCE
OF SNOW SHOWERS. WAVES BUILDING TO 6 TO 9 FEET OCCASIONALLY TO
11 FEET.
FRIDAY
EAST GALES TO 40 KNOTS BECOMING NORTH 15 TO 25 KNOTS.
FREEZING SPRAY. A CHANCE OF SNOW SHOWERS. WAVES BUILDING TO 7 TO
10 FEET OCCASIONALLY TO 13 FEET, THEN SUBSIDING TO 4 TO 7 FEET
OCCASIONALLY TO 9 FEET.
SATURDAY
SOUTHEAST WINDS 10 TO 20 KNOTS INCREASING TO GALES TO
35 KNOTS. A CHANCE OF SNOW SHOWERS. FREEZING SPRAY. WAVES
SUBSIDING TO 1 TO 3 FEET, THEN BUILDING TO 5 TO 8 FEET
OCCASIONALLY TO 10 FEET.
LSZ261-102000-
MAFOR 1015/
SUPERIOR WEST 11120 13230 11220 13120. A CHANCE OF SNOW TONIGHT
AND WEDNESDAY MORNING. WAVES 3 TO 5 FEET THIS AFTERNOON AND
TONIGHT. WAVES 2 TO 4 FEET WEDNESDAY MORNING.
SUPERIOR NORTH CENTRAL 12120 14220 12120. A CHANCE OF SNOW
OVERNIGHT AND WEDNESDAY MORNING. WAVES 2 TO 3 FEET THIS
AFTERNOON. WAVES 2 TO 3 FEET BUILDING TO 3 TO 5 FEET TONIGHT.
WAVES 3 TO 5 FEET WEDNESDAY MORNING.
SUPERIOR SOUTH CENTRAL 12120 12220 12227 11127 11137. WAVES 2 TO
4 FEET THIS AFTERNOON. WAVES 3 TO 6 FEET TONIGHT AND WEDNESDAY
MORNING.
SUPERIOR EAST 13120 12230 11237 12137. WAVES 2 TO 4 FEET THIS
AFTERNOON. WAVES 2 TO 4 FEET BUILDING TO 3 TO 5 FEET TONIGHT.
WAVES 3 TO 5 FEET WEDNESDAY MORNING.
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
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page