400
FZUS63 KMQT 170901
GLFLS
OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
400 AM EST TUE FEB 17 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
HIGH PRESSURE OF 30.0 INCHES OVER LAKE SUPERIOR THIS MORNING WILL
STRENGTHEN TO 30.2 INCHES THROUGH THIS AFTERNOON AS A 30.4 INCH
RIDGE CROSSES NORTHERN ONTARIO TODAY. PRESSURE WILL GRADUALLY FALL
THROUGH TONIGHT TO 29.6 INCHES OVER THE LAKE BY WEDNESDAY MORNING AS
A 29.1 INCH LOW MOVES FROM THE ROCKIES TO THE NORTHERN PLAINS. 29.8
INCH TROUGHING THEN PERSISTS OVER THE LAKE THROUGH THURSDAY,
DEEPENING BACK TO 29.5 INCHES BY FRIDAY MORNING AS A 29.3 INCH LOW
APPROACHES UPPER MICHIGAN FROM THE SOUTH.
LSZ162-172100-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
400 AM EST TUE FEB 17 2026 /300 AM CST TUE FEB 17 2026/
...GALE WARNING IN EFFECT FROM 4 PM EST /3 PM CST/ THIS AFTERNOON
THROUGH THIS EVENING...
...STORM WARNING IN EFFECT FROM THIS EVENING THROUGH WEDNESDAY
EVENING...
EARLY THIS MORNING
NORTHEAST WINDS 5 TO 15 KNOTS. WAVES CALM
TO 2 FEET.
TODAY
EAST WINDS 10 TO 20 KNOTS INCREASING TO GALES TO
40 KNOTS. WAVES BUILDING TO 6 TO 9 FEET OCCASIONALLY TO 11 FEET.
TONIGHT
EAST GALES TO 45 KNOTS INCREASING TO STORM FORCE WINDS
TO 55 KNOTS LATE. A CHANCE OF SNOW, POSSIBLY MIXED WITH FREEZING
RAIN IN THE EVENING, THEN SNOW AFTER MIDNIGHT. WAVES BUILDING TO
7 TO 11 FEET OCCASIONALLY TO 14 FEET.
WEDNESDAY
EAST STORM FORCE WINDS TO 55 KNOTS DIMINISHING TO
GALES TO 45 KNOTS BY MID AFTERNOON. SNOW. WAVES SUBSIDING TO 6 TO
9 FEET OCCASIONALLY TO 11 FEET.
WEDNESDAY NIGHT
EAST GALES TO 45 KNOTS. 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 NORTHEAST 20 TO
30 KNOTS IN THE AFTERNOON. A CHANCE OF SNOW SHOWERS. WAVES
SUBSIDING TO 3 TO 5 FEET OCCASIONALLY TO 7 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 BECOMING NORTH 15 TO
25 KNOTS. A CHANCE OF SNOW. WAVES 2 TO 4 FEET.
SATURDAY
NORTHWEST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO
CALM TO 2 FEET.
NOTE, WAVE HEIGHT FORECASTS ARE FOR ICE FREE AREAS.
LSZ263-172100-
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 TUE FEB 17 2026
...GALE WARNING IN EFFECT FROM LATE TONIGHT THROUGH LATE
WEDNESDAY NIGHT...
EARLY THIS MORNING
EAST WINDS LESS THAN 10 KNOTS. PATCHY DENSE
FOG. WAVES CALM TO 2 FEET.
TODAY
NORTHEAST WINDS 5 TO 15 KNOTS BECOMING EAST 15 TO
25 KNOTS BY LATE MORNING, THEN INCREASING TO 20 TO 30 KNOTS BY
MID AFTERNOON. WAVES BUILDING TO 2 TO 4 FEET.
TONIGHT
EAST GALES TO 45 KNOTS. A CHANCE OF SNOW, POSSIBLY
MIXED WITH FREEZING RAIN IN THE EVENING, THEN SNOW AFTER
MIDNIGHT. WAVES BUILDING TO 10 TO 14 FEET OCCASIONALLY TO
18 FEET.
WEDNESDAY
EAST GALES TO 45 KNOTS WITH A FEW STORM FORCE GUSTS
TO 55 KNOTS POSSIBLE DIMINISHING TO GALES TO 45 KNOTS. SNOW.
RAIN, POSSIBLY MIXED WITH FREEZING RAIN IN THE AFTERNOON. WAVES
BUILDING TO 12 TO 17 FEET OCCASIONALLY TO 21 FEET, THEN SUBSIDING
TO 10 TO 14 FEET OCCASIONALLY TO 18 FEET.
WEDNESDAY NIGHT
EAST GALES TO 45 KNOTS. A CHANCE OF SNOW
SHOWERS. WAVES SUBSIDING TO 8 TO 11 FEET OCCASIONALLY TO 14 FEET.
THURSDAY
EAST GALES TO 35 KNOTS DIMINISHING TO 20 TO 30 KNOTS
IN THE AFTERNOON. 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
5 TO 8 FEET OCCASIONALLY TO 10 FEET.
FRIDAY
NORTHEAST WINDS 20 TO 30 KNOTS BECOMING NORTH 15 TO
25 KNOTS. A CHANCE OF SNOW. WAVES SUBSIDING TO 3 TO 5 FEET
OCCASIONALLY TO 7 FEET.
SATURDAY
NORTHWEST WINDS 10 TO 20 KNOTS. WAVES SUBSIDING TO
CALM TO 2 FEET.
NOTE, WAVE HEIGHT FORECASTS ARE FOR ICE FREE AREAS.
LSZ264-172100-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
400 AM EST TUE FEB 17 2026
...GALE WARNING IN EFFECT FROM LATE TONIGHT THROUGH LATE
WEDNESDAY NIGHT...
EARLY THIS MORNING
NORTHWEST WINDS 5 TO 15 KNOTS. PATCHY DENSE
FOG. WAVES CALM TO 2 FEET.
TODAY
NORTH WINDS 5 TO 15 KNOTS BECOMING NORTHEAST 10 TO
20 KNOTS BY LATE MORNING, THEN VEERING EAST BY MID AFTERNOON.
WAVES BUILDING TO 2 TO 4 FEET.
TONIGHT
EAST WINDS 20 TO 30 KNOTS INCREASING TO GALES TO
40 KNOTS BY MIDNIGHT. A CHANCE OF SNOW. FREEZING SPRAY AFTER
MIDNIGHT. WAVES BUILDING TO 10 TO 14 FEET OCCASIONALLY TO
18 FEET.
WEDNESDAY
EAST GALES TO 45 KNOTS WITH A FEW STORM FORCE GUSTS
TO 50 KNOTS POSSIBLE DIMINISHING TO GALES TO 45 KNOTS. FREEZING
SPRAY. SNOW. A SLIGHT CHANCE OF FREEZING RAIN IN THE AFTERNOON.
WAVES BUILDING TO 12 TO 17 FEET OCCASIONALLY TO 21 FEET, THEN
SUBSIDING TO 10 TO 14 FEET OCCASIONALLY TO 18 FEET.
WEDNESDAY NIGHT
EAST GALES TO 40 KNOTS. FREEZING SPRAY. A
CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO 9 TO 12 FEET
OCCASIONALLY TO 15 FEET.
THURSDAY
EAST GALES TO 35 KNOTS. FREEZING SPRAY IN THE
MORNING. A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO 6 TO 9 FEET
OCCASIONALLY TO 11 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 6 TO 9 FEET OCCASIONALLY TO 11 FEET.
FRIDAY
NORTHEAST GALES TO 35 KNOTS DIMINISHING TO 15 TO
25 KNOTS. FREEZING SPRAY. A CHANCE OF SNOW. WAVES SUBSIDING TO
3 TO 5 FEET OCCASIONALLY TO 7 FEET.
SATURDAY
NORTH WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS. WAVES SUBSIDING TO 1 TO 3 FEET.
NOTE, WAVE HEIGHT FORECASTS ARE FOR ICE FREE AREAS.
LSZ265-172100-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
400 AM EST TUE FEB 17 2026
...GALE WARNING IN EFFECT FROM LATE TONIGHT THROUGH LATE
WEDNESDAY NIGHT...
EARLY THIS MORNING
NORTHWEST WINDS 5 TO 15 KNOTS. PATCHY FOG.
WAVES CALM TO 2 FEET.
TODAY
NORTH WINDS 5 TO 15 KNOTS VEERING NORTHEAST BY LATE
MORNING, THEN BECOMING EAST 10 TO 20 KNOTS BY MID AFTERNOON.
PATCHY FOG. WAVES BUILDING TO 1 TO 3 FEET.
TONIGHT
EAST WINDS 20 TO 30 KNOTS INCREASING TO GALES TO
40 KNOTS BY MIDNIGHT. PATCHY FOG IN THE EVENING. A SLIGHT CHANCE
OF SNOW IN THE EVENING, THEN SNOW AFTER MIDNIGHT. WAVES BUILDING
TO 10 TO 14 FEET OCCASIONALLY TO 18 FEET.
WEDNESDAY
EAST GALES TO 45 KNOTS. SNOW. A SLIGHT CHANCE OF
FREEZING RAIN IN THE AFTERNOON. WAVES BUILDING TO 11 TO 15 FEET
OCCASIONALLY TO 19 FEET, THEN SUBSIDING TO 10 TO 14 FEET
OCCASIONALLY TO 18 FEET.
WEDNESDAY NIGHT
EAST GALES TO 40 KNOTS. A CHANCE OF SNOW
SHOWERS. WAVES SUBSIDING TO 6 TO 9 FEET OCCASIONALLY TO 11 FEET.
THURSDAY
EAST GALES TO 35 KNOTS DIMINISHING TO 20 TO 30 KNOTS
IN THE AFTERNOON. A CHANCE OF SNOW SHOWERS. 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 CHANCE OF SNOW SHOWERS. WAVES
BUILDING TO 5 TO 8 FEET OCCASIONALLY TO 10 FEET.
FRIDAY
EAST GALES TO 35 KNOTS BECOMING NORTH 20 TO 30 KNOTS.
SNOW LIKELY, THEN A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO
3 TO 5 FEET OCCASIONALLY TO 7 FEET.
SATURDAY
NORTHWEST WINDS 20 TO 30 KNOTS. WAVES SUBSIDING TO
1 TO 3 FEET.
NOTE, WAVE HEIGHT FORECASTS ARE FOR ICE FREE AREAS.
LSZ266-172100-
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 TUE FEB 17 2026
...GALE WARNING IN EFFECT FROM LATE TONIGHT THROUGH LATE
WEDNESDAY NIGHT...
EARLY THIS MORNING
NORTHWEST WINDS 5 TO 15 KNOTS. PATCHY FOG.
WAVES CALM TO 2 FEET.
TODAY
NORTH WINDS 5 TO 15 KNOTS VEERING NORTHEAST BY LATE
MORNING, THEN BECOMING EAST 10 TO 20 KNOTS BY MID AFTERNOON.
PATCHY FOG. WAVES BUILDING TO 1 TO 3 FEET.
TONIGHT
EAST WINDS 20 TO 30 KNOTS INCREASING TO GALES TO
40 KNOTS BY MIDNIGHT. A CHANCE OF SNOW. FREEZING SPRAY AFTER
MIDNIGHT. WAVES BUILDING TO 10 TO 14 FEET OCCASIONALLY TO
18 FEET.
WEDNESDAY
EAST GALES TO 45 KNOTS WITH A FEW STORM FORCE GUSTS
TO 50 KNOTS POSSIBLE DIMINISHING TO GALES TO 45 KNOTS. FREEZING
SPRAY. A SLIGHT CHANCE OF SLEET IN THE MORNING. SNOW. A SLIGHT
CHANCE OF FREEZING RAIN IN THE AFTERNOON. WAVES BUILDING TO 11 TO
15 FEET OCCASIONALLY TO 19 FEET, THEN SUBSIDING TO 10 TO 14 FEET
OCCASIONALLY TO 18 FEET.
WEDNESDAY NIGHT
EAST GALES TO 40 KNOTS. A CHANCE OF SNOW
SHOWERS. FREEZING SPRAY AFTER MIDNIGHT. WAVES SUBSIDING TO 8 TO
11 FEET OCCASIONALLY TO 14 FEET.
THURSDAY
EAST GALES TO 40 KNOTS. FREEZING SPRAY IN THE
MORNING. A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO 5 TO 8 FEET
OCCASIONALLY TO 10 FEET.
THURSDAY NIGHT
EAST GALES TO 40 KNOTS. A CHANCE OF SNOW
SHOWERS. WAVES 5 TO 8 FEET OCCASIONALLY TO 10 FEET.
FRIDAY
EAST GALES TO 40 KNOTS BECOMING NORTHEAST 20 TO
30 KNOTS. A CHANCE OF SNOW. WAVES SUBSIDING TO 3 TO 5 FEET
OCCASIONALLY TO 7 FEET.
SATURDAY
NORTHWEST WINDS 20 TO 30 KNOTS. WAVES SUBSIDING TO
2 TO 4 FEET.
NOTE, WAVE HEIGHT FORECASTS ARE FOR ICE FREE AREAS.
LSZ267-172100-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
400 AM EST TUE FEB 17 2026
...GALE WARNING IN EFFECT FROM WEDNESDAY MORNING THROUGH
WEDNESDAY EVENING...
EARLY THIS MORNING
WEST WINDS 5 TO 15 KNOTS. PATCHY FOG. WAVES
CALM TO 2 FEET.
TODAY
NORTHWEST WINDS 5 TO 15 KNOTS VEERING NORTH BY LATE
MORNING, THEN VEERING EAST BY MID AFTERNOON. AREAS OF DENSE FOG
AND DENSE FREEZING FOG IN THE MORNING, THEN PATCHY FOG IN THE
AFTERNOON. WAVES CALM TO 2 FEET.
TONIGHT
EAST WINDS 15 TO 25 KNOTS INCREASING TO GALES TO
35 KNOTS. A CHANCE OF SNOW AFTER MIDNIGHT. WAVES BUILDING TO 5 TO
8 FEET OCCASIONALLY TO 10 FEET.
WEDNESDAY
EAST GALES TO 40 KNOTS. FREEZING SPRAY IN THE
MORNING. A SLIGHT CHANCE OF SLEET IN THE MORNING. SNOW. A SLIGHT
CHANCE OF FREEZING RAIN 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.
WEDNESDAY NIGHT
EAST GALES TO 35 KNOTS. A CHANCE OF SNOW
SHOWERS IN THE EVENING. FREEZING SPRAY AFTER MIDNIGHT. WAVES
SUBSIDING TO 3 TO 6 FEET OCCASIONALLY TO 8 FEET.
THURSDAY
EAST GALES TO 35 KNOTS BECOMING SOUTHEAST 20 TO
30 KNOTS IN THE AFTERNOON. WAVES SUBSIDING TO 3 TO 5 FEET
OCCASIONALLY TO 7 FEET.
THURSDAY NIGHT
EAST GALES TO 35 KNOTS. WAVES BUILDING TO 3 TO
6 FEET OCCASIONALLY TO 8 FEET.
FRIDAY
EAST GALES TO 35 KNOTS DIMINISHING TO 15 TO 25 KNOTS.
SNOW LIKELY, THEN A CHANCE OF SNOW SHOWERS. WAVES SUBSIDING TO
2 TO 4 FEET.
SATURDAY
NORTH WINDS 15 TO 25 KNOTS DIMINISHING TO 10 TO
20 KNOTS. WAVES SUBSIDING TO 1 TO 3 FEET, THEN BUILDING TO 2 TO
4 FEET.
NOTE, WAVE HEIGHT FORECASTS ARE FOR ICE FREE AREAS.
LSZ261-171500-
MAFOR 1710/
SUPERIOR WEST...STORM WARNING IN EFFECT...11204 11210 11230 11240
11250 11257 11267 11277. WAVES OMITTED DUE TO THE LAKE BEING
MOSTLY ICE COVERED.
SUPERIOR NORTH CENTRAL...GALE WARNING IN EFFECT...11700 19704
11810 11110 11120 11230 11240 11250 11251. A CHANCE OF SNOW
OVERNIGHT. WAVES 1 TO 3 FEET TODAY. WAVES 2 TO 4 FEET BUILDING TO
9 TO 12 FEET TONIGHT.
SUPERIOR SOUTH CENTRAL...GALE WARNING IN EFFECT...11700 11800
11110 12220 11240 12257. WAVES 2 FEET OR LESS TODAY. WAVES 2 TO 4
FEET BUILDING TO 7 TO 11 FEET TONIGHT. WAVE HEIGHTS ARE FOR ICE
FREE AREAS.
SUPERIOR EAST...GALE WARNING IN EFFECT...11700 11804 11800 11100
11210 11240 12250. A CHANCE OF SNOW OVERNIGHT. WAVES 1 TO 2 FEET
TODAY. WAVES 1 TO 3 FEET BUILDING TO 5 TO 9 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
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page