406
FZUS63 KMQT 180901
GLFLS
OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
400 AM EST WED FEB 18 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
29.7 INCH TROUGHING WILL PERSIST OVER LAKE SUPERIOR THROUGH THURSDAY
AS A 29.3 INCH LOW OVER MINNESOTA THIS MORNING MOVES EAST TO UPPER
MICHIGAN AND WEAKENS TO 29.6 INCHES THROUGH THURSDAY MORNING.
PRESSURE WILL THEN STEADILY FALL TO AROUND 29.4 INCHES OVER THE LAKE
THURSDAY NIGHT THROUGH FRIDAY AS A SECOND 29.3 INCH LOW OVER
MISSOURI THURSDAY AFTERNOON TRACKS TO NORTHERN LAKE MICHIGAN AT 29.2
INCHES BY FRIDAY AFTERNOON. PRESSURE THEN INCREASES TO AROUND 30.1
INCHES OVER LAKE SUPERIOR THROUGH THE WEEKEND AS THE LOW DISSIPATES
OVER THE LOWER GREAT LAKES.
LSZ162-182100-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
400 AM EST WED FEB 18 2026 /300 AM CST WED FEB 18 2026/
..STORM WARNING IN EFFECT THROUGH THIS EVENING
EARLY THIS MORNING
EAST STORM FORCE WINDS TO 55 KNOTS. SNOW,
POSSIBLY MIXED WITH SLEET. WAVES 7 TO 10 FEET OCCASIONALLY TO
13 FEET.
TODAY
EAST STORM FORCE WINDS TO 55 KNOTS DIMINISHING TO GALES
TO 45 KNOTS BY MID AFTERNOON. SNOW. WAVES BUILDING TO 7 TO
11 FEET OCCASIONALLY TO 14 FEET.
TONIGHT
EAST GALES TO 45 KNOTS. SNOW SHOWERS LIKELY. WAVES
SUBSIDING TO 5 TO 8 FEET OCCASIONALLY TO 10 FEET.
THURSDAY
EAST GALES TO 35 KNOTS DIMINISHING TO 20 TO 30 KNOTS
BY LATE MORNING, THEN BACKING NORTHEAST BY MID AFTERNOON. SNOW
SHOWERS LIKELY IN THE MORNING, THEN A CHANCE OF SNOW SHOWERS IN
THE AFTERNOON. WAVES SUBSIDING TO 3 TO 6 FEET OCCASIONALLY TO
8 FEET.
THURSDAY NIGHT
NORTHEAST WINDS 20 TO 30 KNOTS. A CHANCE OF
SNOW SHOWERS. WAVES SUBSIDING TO 1 TO 3 FEET.
FRIDAY
NORTHEAST WINDS 20 TO 30 KNOTS. A CHANCE OF SNOW. WAVES
BUILDING TO 2 TO 4 FEET.
FRIDAY NIGHT
NORTH WINDS 15 TO 25 KNOTS BACKING NORTHWEST
AFTER MIDNIGHT. A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO 1 TO
3 FEET.
SATURDAY
NORTHWEST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO
CALM TO 2 FEET.
SUNDAY
NORTHWEST WINDS 10 TO 20 KNOTS VEERING NORTH. WAVES
CALM TO 2 FEET.
NOTE, WAVE HEIGHT FORECASTS ARE FOR ICE FREE AREAS.
LSZ263-182100-
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-
400 AM EST WED FEB 18 2026
..GALE WARNING IN EFFECT THROUGH LATE TONIGHT
EARLY THIS MORNING
EAST GALES TO 45 KNOTS WITH A FEW STORM
FORCE GUSTS TO 55 KNOTS POSSIBLE. SNOW, POSSIBLY MIXED WITH
SLEET. WAVES 11 TO 15 FEET OCCASIONALLY TO 19 FEET BUILDING TO
12 TO 17 FEET OCCASIONALLY TO 21 FEET.
TODAY
EAST GALES TO 45 KNOTS WITH A FEW STORM FORCE GUSTS TO
50 KNOTS POSSIBLE DIMINISHING TO GALES TO 45 KNOTS. SNOW. WAVES
BUILDING TO 15 TO 20 FEET OCCASIONALLY TO 25 FEET.
TONIGHT
EAST GALES TO 45 KNOTS. SNOW LIKELY. WAVES SUBSIDING
TO 10 TO 14 FEET OCCASIONALLY TO 18 FEET.
THURSDAY
EAST GALES TO 35 KNOTS DIMINISHING TO 20 TO 30 KNOTS.
A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO 5 TO 8 FEET
OCCASIONALLY TO 10 FEET.
THURSDAY NIGHT
EAST WINDS 20 TO 30 KNOTS BECOMING NORTHEAST
GALES TO 35 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW SHOWERS. WAVES
SUBSIDING TO 4 TO 8 FEET OCCASIONALLY TO 10 FEET.
FRIDAY
NORTHEAST WINDS 20 TO 30 KNOTS. A CHANCE OF SNOW. WAVES
BUILDING TO 6 TO 9 FEET OCCASIONALLY TO 11 FEET, THEN SUBSIDING
TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET.
FRIDAY NIGHT
NORTH WINDS 15 TO 25 KNOTS. A CHANCE OF SNOW
SHOWERS. WAVES SUBSIDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
SATURDAY
NORTHWEST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO
1 TO 3 FEET, THEN BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
SUNDAY
NORTHWEST WINDS 10 TO 20 KNOTS VEERING NORTH. WAVES
BUILDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
NOTE, WAVE HEIGHT FORECASTS ARE FOR ICE FREE AREAS.
LSZ264-182100-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
400 AM EST WED FEB 18 2026
..GALE WARNING IN EFFECT THROUGH THURSDAY MORNING
EARLY THIS MORNING
EAST GALES TO 45 KNOTS. FREEZING SPRAY. A
CHANCE OF SNOW. WAVES 11 TO 15 FEET OCCASIONALLY TO 19 FEET
BUILDING TO 12 TO 17 FEET OCCASIONALLY TO 21 FEET.
TODAY
EAST GALES TO 45 KNOTS WITH A FEW STORM FORCE GUSTS TO
55 KNOTS POSSIBLE DIMINISHING TO GALES TO 45 KNOTS BY MID
AFTERNOON. FREEZING SPRAY. SNOW. WAVES BUILDING TO 15 TO 20 FEET
OCCASIONALLY TO 25 FEET.
TONIGHT
EAST GALES TO 40 KNOTS. SNOW SHOWERS LIKELY. WAVES
SUBSIDING TO 10 TO 14 FEET OCCASIONALLY TO 18 FEET.
THURSDAY
EAST GALES TO 35 KNOTS DIMINISHING TO 20 TO 30 KNOTS
BY MID AFTERNOON. SNOW SHOWERS LIKELY IN THE MORNING, THEN A
CHANCE OF SNOW SHOWERS IN THE AFTERNOON. WAVES SUBSIDING TO 8 TO
11 FEET OCCASIONALLY TO 14 FEET.
THURSDAY NIGHT
EAST WINDS 20 TO 30 KNOTS INCREASING TO GALES
TO 35 KNOTS AFTER MIDNIGHT. A CHANCE OF SNOW SHOWERS. WAVES
SUBSIDING TO 7 TO 10 FEET OCCASIONALLY TO 13 FEET.
FRIDAY
EAST GALES TO 35 KNOTS BACKING NORTHEAST IN THE
AFTERNOON. A CHANCE OF SNOW. WAVES SUBSIDING TO 4 TO 7 FEET
OCCASIONALLY TO 9 FEET.
FRIDAY NIGHT
NORTHEAST WINDS 15 TO 25 KNOTS BACKING NORTH
AFTER MIDNIGHT. A CHANCE OF SNOW SHOWERS. FREEZING SPRAY AFTER
MIDNIGHT. WAVES SUBSIDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
SATURDAY
NORTH WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS. FREEZING SPRAY. WAVES SUBSIDING TO 2 TO 4 FEET, THEN
BUILDING TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET.
SUNDAY
NORTH WINDS 15 TO 25 KNOTS. HEAVY FREEZING SPRAY. WAVES
BUILDING TO 5 TO 9 FEET OCCASIONALLY TO 11 FEET.
NOTE, WAVE HEIGHT FORECASTS ARE FOR ICE FREE AREAS.
LSZ265-182100-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
400 AM EST WED FEB 18 2026
..GALE WARNING IN EFFECT THROUGH THURSDAY MORNING
EARLY THIS MORNING
EAST GALES TO 45 KNOTS. SNOW. WAVES 10 TO
14 FEET OCCASIONALLY TO 18 FEET BUILDING TO 11 TO 15 FEET
OCCASIONALLY TO 19 FEET.
TODAY
EAST GALES TO 45 KNOTS WITH A FEW STORM FORCE GUSTS TO
55 KNOTS POSSIBLE DIMINISHING TO GALES TO 45 KNOTS BY MID
AFTERNOON. SNOW. A SLIGHT CHANCE OF FREEZING RAIN IN THE
AFTERNOON. WAVES BUILDING TO 15 TO 20 FEET OCCASIONALLY TO
25 FEET.
TONIGHT
EAST GALES TO 40 KNOTS. SNOW SHOWERS LIKELY, POSSIBLY
MIXED WITH FREEZING RAIN IN THE EVENING, THEN A CHANCE OF SNOW
SHOWERS AFTER MIDNIGHT. WAVES SUBSIDING TO 7 TO 10 FEET
OCCASIONALLY TO 13 FEET.
THURSDAY
EAST GALES TO 35 KNOTS VEERING SOUTHEAST BY LATE
MORNING, THEN BECOMING EAST 20 TO 30 KNOTS BY MID AFTERNOON. A
CHANCE OF SNOW SHOWERS. A SLIGHT CHANCE OF RAIN SHOWERS IN THE
AFTERNOON. WAVES SUBSIDING TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET.
THURSDAY NIGHT
EAST WINDS 20 TO 30 KNOTS INCREASING TO GALES
TO 35 KNOTS AFTER MIDNIGHT. A SLIGHT CHANCE OF RAIN SHOWERS IN
THE EVENING. A CHANCE OF SNOW SHOWERS, POSSIBLY MIXED WITH
FREEZING RAIN. WAVES BUILDING TO 5 TO 8 FEET OCCASIONALLY TO
10 FEET.
FRIDAY
EAST GALES TO 35 KNOTS BACKING NORTHEAST IN THE
AFTERNOON. SNOW LIKELY IN THE MORNING, THEN A CHANCE OF SNOW IN
THE AFTERNOON. WAVES BUILDING TO 6 TO 9 FEET OCCASIONALLY TO
11 FEET, THEN SUBSIDING TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET.
FRIDAY NIGHT
NORTHEAST WINDS 20 TO 30 KNOTS BACKING NORTHWEST
AFTER MIDNIGHT. A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO 3 TO
5 FEET OCCASIONALLY TO 7 FEET.
SATURDAY
NORTHWEST WINDS 20 TO 30 KNOTS. A CHANCE OF SNOW
SHOWERS. WAVES SUBSIDING TO 2 TO 4 FEET, THEN BUILDING TO 4 TO
7 FEET OCCASIONALLY TO 9 FEET.
SUNDAY
NORTHWEST WINDS 20 TO 30 KNOTS. WAVES BUILDING TO 7 TO
10 FEET OCCASIONALLY TO 13 FEET.
NOTE, WAVE HEIGHT FORECASTS ARE FOR ICE FREE AREAS.
LSZ266-182100-
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-
400 AM EST WED FEB 18 2026
..GALE WARNING IN EFFECT THROUGH THURSDAY MORNING
EARLY THIS MORNING
EAST GALES TO 45 KNOTS. A CHANCE OF SNOW.
WAVES 10 TO 14 FEET OCCASIONALLY TO 18 FEET BUILDING TO 11 TO
15 FEET OCCASIONALLY TO 19 FEET.
TODAY
EAST GALES TO 45 KNOTS WITH A FEW STORM FORCE GUSTS TO
55 KNOTS POSSIBLE DIMINISHING TO GALES TO 45 KNOTS BY MID
AFTERNOON. FREEZING SPRAY. A SLIGHT CHANCE OF SLEET IN THE
MORNING. SNOW. A SLIGHT CHANCE OF FREEZING RAIN IN THE AFTERNOON.
WAVES BUILDING TO 15 TO 20 FEET OCCASIONALLY TO 25 FEET.
TONIGHT
EAST GALES TO 40 KNOTS. SNOW SHOWERS LIKELY IN THE
EVENING, THEN A CHANCE OF SNOW SHOWERS AFTER MIDNIGHT. WAVES
SUBSIDING TO 9 TO 12 FEET OCCASIONALLY TO 15 FEET.
THURSDAY
EAST GALES TO 40 KNOTS. SNOW SHOWERS LIKELY IN THE
MORNING, THEN A SLIGHT CHANCE OF RAIN AND SNOW SHOWERS IN THE
AFTERNOON. WAVES SUBSIDING TO 6 TO 9 FEET OCCASIONALLY TO
11 FEET.
THURSDAY NIGHT
EAST GALES TO 40 KNOTS. A SLIGHT CHANCE OF RAIN
SHOWERS IN THE EVENING. A CHANCE OF SNOW. WAVES 6 TO 9 FEET
OCCASIONALLY TO 11 FEET.
FRIDAY
EAST GALES TO 40 KNOTS. A CHANCE OF SNOW. WAVES
SUBSIDING TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET.
FRIDAY NIGHT
EAST WINDS 20 TO 30 KNOTS BACKING NORTHEAST AFTER
MIDNIGHT. A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO 3 TO
5 FEET OCCASIONALLY TO 7 FEET.
SATURDAY
NORTHWEST WINDS 20 TO 30 KNOTS. FREEZING SPRAY. WAVES
BUILDING TO 5 TO 8 FEET OCCASIONALLY TO 10 FEET.
SUNDAY
NORTH WINDS 20 TO 30 KNOTS. HEAVY FREEZING SPRAY. WAVES
BUILDING TO 7 TO 11 FEET OCCASIONALLY TO 14 FEET.
NOTE, WAVE HEIGHT FORECASTS ARE FOR ICE FREE AREAS.
LSZ267-182100-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
400 AM EST WED FEB 18 2026
..GALE WARNING IN EFFECT THROUGH LATE TONIGHT
EARLY THIS MORNING
EAST GALES TO 40 KNOTS. A SLIGHT CHANCE OF
SNOW. WAVES 5 TO 8 FEET OCCASIONALLY TO 10 FEET.
TODAY
EAST GALES TO 45 KNOTS. FREEZING SPRAY. A CHANCE OF
SNOW, POSSIBLY MIXED WITH SLEET IN THE MORNING. SNOW IN THE
AFTERNOON. WAVES BUILDING TO 7 TO 11 FEET OCCASIONALLY TO
14 FEET.
TONIGHT
EAST GALES TO 35 KNOTS. FREEZING SPRAY IN THE EVENING.
SNOW SHOWERS LIKELY IN THE EVENING, THEN A CHANCE OF SNOW SHOWERS
AFTER MIDNIGHT. WAVES SUBSIDING TO 4 TO 7 FEET OCCASIONALLY TO
9 FEET.
THURSDAY
EAST GALES TO 35 KNOTS BECOMING SOUTHEAST 20 TO
30 KNOTS. A CHANCE OF SNOW SHOWERS, POSSIBLY MIXED WITH FREEZING
RAIN IN THE MORNING. WAVES BUILDING TO 5 TO 8 FEET OCCASIONALLY
TO 10 FEET, THEN SUBSIDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
THURSDAY NIGHT
EAST GALES TO 35 KNOTS. A SLIGHT CHANCE OF RAIN
IN THE EVENING. A CHANCE OF SNOW. A CHANCE OF FREEZING RAIN AFTER
MIDNIGHT. WAVES 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
FRIDAY
EAST GALES TO 35 KNOTS. SNOW LIKELY IN THE MORNING,
THEN A CHANCE OF SNOW IN THE AFTERNOON. WAVES SUBSIDING TO 3 TO
5 FEET OCCASIONALLY TO 7 FEET.
FRIDAY NIGHT
EAST WINDS 15 TO 25 KNOTS. A CHANCE OF SNOW
SHOWERS. WAVES SUBSIDING TO 1 TO 3 FEET.
SATURDAY
NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS. WAVES BUILDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
SUNDAY
NORTH WINDS 15 TO 25 KNOTS. HEAVY FREEZING SPRAY. WAVES
SUBSIDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET, THEN BUILDING TO
5 TO 8 FEET OCCASIONALLY TO 10 FEET.
NOTE, WAVE HEIGHT FORECASTS ARE FOR ICE FREE AREAS.
LSZ261-181500-
MAFOR 1810/
SUPERIOR WEST...STORM WARNING IN EFFECT...14277 11267 11257 11247
11257. WAVES OMITTED DUE TO THE LAKE BEING MOSTLY ICE COVERED.
SUPERIOR NORTH CENTRAL...GALE WARNING IN EFFECT...11271 12277
12267 13257. WAVES 11 TO 15 FEET BUILDING TO 15 TO 20 FEET TODAY.
WAVES 14 TO 19 FEET SUBSIDING TO 11 TO 16 FEET TONIGHT.
SUPERIOR SOUTH CENTRAL...GALE WARNING IN EFFECT...13277 12267
11257 12250. WAVES 10 TO 14 FEET BUILDING TO 15 TO 19 FEET TODAY.
WAVES 13 TO 17 FEET SUBSIDING TO 8 TO 11 FEET TONIGHT. WAVE
HEIGHTS ARE FOR ICE FREE AREAS.
SUPERIOR EAST...GALE WARNING IN EFFECT...12261 13267 12257 11250.
WAVES 6 TO 9 FEET BUILDING TO 10 TO 13 FEET TODAY. WAVES 10 TO 13
FEET SUBSIDING TO 7 TO 11 FEET TONIGHT.
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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