042
FZUS63 KMQT 181501
GLFLS
OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
1000 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 PERSISTS 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 THEN FALLS TO AROUND 29.5 INCHES OVER THE LAKE FOR FRIDAY
AS A SECOND 29.3 INCH LOW OVER MISSOURI THURSDAY AFTERNOON TRACKS TO
NORTHERN LAKE MICHIGAN BY FRIDAY AFTERNOON. PRESSURE THEN RISES
SATURDAY THROUGH MONDAY AS THE LOW PRESSURE DISSIPATES OVER THE
GREAT LAKES AND HIGH PRESSURE DESCENDS SOUTHEAST INTO THE REGION.
PRESSURE OVER THE LAKE REACHES AT LEAST 30.4 INCHES BY MONDAY NIGHT.
LSZ162-182100-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
1000 AM EST WED FEB 18 2026 /900 AM CST WED FEB 18 2026/
...STORM WARNING IN EFFECT UNTIL 7 PM EST /6 PM CST/ THIS
EVENING...
REST OF TODAY
EAST STORM FORCE WINDS TO 55 KNOTS DIMINISHING
TO GALES TO 45 KNOTS BY MID AFTERNOON. SNOW SHOWERS. WAVES 10 TO
14 FEET OCCASIONALLY TO 18 FEET BUILDING TO 11 TO 15 FEET
OCCASIONALLY TO 19 FEET, THEN SUBSIDING TO 10 TO 14 FEET
OCCASIONALLY TO 18 FEET.
TONIGHT
EAST GALES TO 45 KNOTS. SNOW SHOWERS LIKELY. WAVES
SUBSIDING TO 6 TO 9 FEET OCCASIONALLY TO 11 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 2 TO 4 FEET.
FRIDAY
NORTHEAST WINDS 20 TO 30 KNOTS. A CHANCE OF SNOW. WAVES
BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 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-
1000 AM EST WED FEB 18 2026
..GALE WARNING IN EFFECT THROUGH LATE TONIGHT
REST OF TODAY
EAST GALES TO 45 KNOTS. SNOW SHOWERS. WAVES
15 TO 20 FEET OCCASIONALLY TO 25 FEET SUBSIDING TO 15 TO 20 FEET
OCCASIONALLY TO 25 FEET.
TONIGHT
EAST GALES TO 45 KNOTS. A CHANCE OF SNOW SHOWERS IN
THE EVENING, THEN SNOW SHOWERS LIKELY AFTER MIDNIGHT. 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 7 TO 10 FEET
OCCASIONALLY TO 13 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 5 TO 8 FEET OCCASIONALLY TO 10 FEET, THEN BUILDING
TO 6 TO 9 FEET OCCASIONALLY TO 11 FEET.
FRIDAY
NORTHEAST WINDS 20 TO 30 KNOTS. A CHANCE OF SNOW. WAVES
SUBSIDING TO 5 TO 8 FEET OCCASIONALLY TO 10 FEET, THEN BUILDING
TO 6 TO 9 FEET OCCASIONALLY TO 11 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 4 TO 7 FEET OCCASIONALLY TO 9 FEET, THEN SUBSIDING 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-
1000 AM EST WED FEB 18 2026
..GALE WARNING IN EFFECT THROUGH THURSDAY MORNING
REST OF TODAY
EAST GALES TO 45 KNOTS. SNOW SHOWERS. WAVES
15 TO 20 FEET OCCASIONALLY TO 25 FEET.
TONIGHT
EAST GALES TO 45 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 7 TO
10 FEET OCCASIONALLY TO 13 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 6 TO 9 FEET OCCASIONALLY TO 11 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 1 TO 3 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-
1000 AM EST WED FEB 18 2026
..GALE WARNING IN EFFECT THROUGH THURSDAY MORNING
REST OF TODAY
EAST GALES TO 45 KNOTS. SNOW SHOWERS. A SLIGHT
CHANCE OF FREEZING RAIN IN THE AFTERNOON. WAVES 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-
1000 AM EST WED FEB 18 2026
..GALE WARNING IN EFFECT THROUGH THURSDAY MORNING
REST OF 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. A SLIGHT CHANCE OF SLEET LATE IN THE MORNING. SNOW
SHOWERS. A SLIGHT CHANCE OF FREEZING RAIN IN THE AFTERNOON. WAVES
15 TO 20 FEET OCCASIONALLY TO 25 FEET.
TONIGHT
EAST GALES TO 45 KNOTS. SNOW SHOWERS LIKELY, POSSIBLY
MIXED WITH FREEZING RAIN 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-
1000 AM EST WED FEB 18 2026
..GALE WARNING IN EFFECT THROUGH LATE TONIGHT
REST OF TODAY
EAST GALES TO 40 KNOTS. A SLIGHT CHANCE OF SLEET
LATE IN THE MORNING. SNOW SHOWERS. WAVES 7 TO 10 FEET
OCCASIONALLY TO 13 FEET BUILDING TO 9 TO 12 FEET OCCASIONALLY TO
15 FEET, THEN SUBSIDING TO 8 TO 11 FEET OCCASIONALLY TO 14 FEET.
TONIGHT
EAST GALES TO 40 KNOTS VEERING SOUTHEAST BY MIDNIGHT,
THEN BACKING EAST LATE. SNOW SHOWERS LIKELY, POSSIBLY MIXED WITH
FREEZING RAIN 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.
LSZ261-182100-
MAFOR 1816/
SUPERIOR WEST...STORM WARNING IN EFFECT...12277 11267 12257
13247. WAVES OMITTED DUE TO THE LAKE BEING MOSTLY ICE COVERED.
SUPERIOR NORTH CENTRAL...GALE WARNING IN EFFECT...11277 13267
14257. WAVES 15 TO 20 FEET THIS AFTERNOON. WAVES 14 TO 19 FEET
SUBSIDING TO 11 TO 16 FEET TONIGHT. WAVES 10 TO 14 FEET THURSDAY
MORNING.
SUPERIOR SOUTH CENTRAL...GALE WARNING IN EFFECT...11277 12267
11257 11250 11350 11250 11350. WAVES 14 TO 19 FEET THIS
AFTERNOON. WAVES 14 TO 18 FEET SUBSIDING TO 8 TO 11 FEET TONIGHT.
WAVES 6 TO 10 FEET THURSDAY MORNING. WAVE HEIGHTS ARE FOR ICE
FREE AREAS.
SUPERIOR EAST...GALE WARNING IN EFFECT...14267 11257 11350 12250.
WAVES 9 TO 13 FEET THIS AFTERNOON. WAVES 10 TO 13 FEET SUBSIDING
TO 7 TO 11 FEET TONIGHT. WAVES 6 TO 9 FEET THURSDAY 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
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