073
FZUS63 KMQT 170801
GLFLS
OPEN LAKE FORECAST FOR LAKE SUPERIOR
NATIONAL WEATHER SERVICE MARQUETTE MI
400 AM EDT FRI JUL 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
30.1 INCH HIGH PRESSURE PERSISTS OVER LAKE SUPERIOR INTO FRIDAY
WHILE GRADUALLY SHIFTING EAST TOWARDS THE ST. LAWRENCE SEAWAY. LOW
PRESSURE PASSING THROUGH THE NORTHERN PLAINS LOOKS TO TRAVERSE THE
THE LAKE AT AROUND 29.7 INCHES FRIDAY EVENING INTO SATURDAY MORNING.
WEAK RIDGING OF 29.9 TO 30.0 INCHES RETURNS LATE SATURDAY AND
REMAINS THROUGH SUNDAY. A STRONG LOW RANGING FROM 29.3 TO 29.5
INCHES OVER NORTHERN ONTARIO LOOKS TO BRING 29.6 INCH TROUGHING OVER
LAKE SUPERIOR ON MONDAY.
LSZ162-172000-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-
400 AM EDT FRI JUL 17 2026 /300 AM CDT FRI JUL 17 2026/
...DENSE SMOKE ADVISORY IN EFFECT UNTIL 8 PM EDT /7 PM CDT/ THIS
EVENING...
EARLY THIS MORNING
NORTHEAST WINDS 5 TO 15 KNOTS. SMOKE. A
SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES CALM TO 2 FEET.
TODAY
NORTHEAST WINDS 5 TO 15 KNOTS VEERING EAST IN THE
AFTERNOON. SMOKE. A CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES
CALM TO 2 FEET.
TONIGHT
WEST WINDS 10 TO 20 KNOTS VEERING NORTHWEST LATE. A
SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS THROUGH MIDNIGHT.
AREAS OF SMOKE. WAVES CALM TO 2 FEET.
SATURDAY
NORTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST IN
THE AFTERNOON. AREAS OF SMOKE. WAVES CALM TO 2 FEET.
SATURDAY NIGHT
WEST WINDS 5 TO 15 KNOTS BECOMING SOUTH LESS
THAN 10 KNOTS AFTER MIDNIGHT. AREAS OF SMOKE THROUGH MIDNIGHT.
WAVES CALM TO 2 FEET.
SUNDAY
SOUTH WINDS 5 TO 15 KNOTS. WAVES CALM TO 2 FEET.
SUNDAY NIGHT
SOUTH WINDS 5 TO 15 KNOTS BECOMING SOUTHWEST
10 TO 20 KNOTS AFTER MIDNIGHT. A CHANCE OF THUNDERSTORMS. SHOWERS
LIKELY AFTER MIDNIGHT. WAVES CALM TO 2 FEET.
MONDAY
SOUTHWEST WINDS 20 TO 30 KNOTS VEERING WEST. A CHANCE
OF SHOWERS AND THUNDERSTORMS. WAVES BUILDING TO 3 TO 5 FEET
OCCASIONALLY TO 7 FEET, THEN SUBSIDING TO 2 TO 4 FEET.
TUESDAY
NORTHWEST WINDS 20 TO 30 KNOTS DIMINISHING TO 10 TO
20 KNOTS. WAVES SUBSIDING TO CALM TO 2 FEET.
LSZ263-172000-
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 EDT FRI JUL 17 2026
..DENSE SMOKE ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING
EARLY THIS MORNING
SOUTHEAST WINDS 5 TO 15 KNOTS. SMOKE. A
SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES CALM TO 2 FEET.
TODAY
SOUTH WINDS 5 TO 15 KNOTS BACKING EAST LATE. SMOKE. A
CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES CALM TO 2 FEET.
TONIGHT
WEST WINDS 5 TO 15 KNOTS VEERING NORTHWEST LATE. AREAS
OF SMOKE. A CHANCE OF THUNDERSTORMS THROUGH MIDNIGHT. A CHANCE OF
SHOWERS. WAVES CALM TO 2 FEET.
SATURDAY
NORTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTHWEST LATE.
SMOKE. WAVES BUILDING TO 1 TO 3 FEET, THEN SUBSIDING TO CALM TO
2 FEET.
SATURDAY NIGHT
WEST WINDS 5 TO 15 KNOTS BACKING SOUTH AFTER
MIDNIGHT. AREAS OF SMOKE THROUGH MIDNIGHT. WAVES CALM TO 2 FEET.
SUNDAY
SOUTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTH BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
SUNDAY NIGHT
SOUTH WINDS 10 TO 20 KNOTS BECOMING SOUTHWEST
20 TO 30 KNOTS AFTER MIDNIGHT. SHOWERS LIKELY AND A CHANCE OF
THUNDERSTORMS AFTER MIDNIGHT. WAVES BUILDING TO 3 TO 5 FEET
OCCASIONALLY TO 7 FEET.
MONDAY
SOUTHWEST WINDS 20 TO 30 KNOTS VEERING WEST. A CHANCE
OF SHOWERS AND THUNDERSTORMS. WAVES BUILDING TO 4 TO 7 FEET
OCCASIONALLY TO 9 FEET, THEN SUBSIDING TO 3 TO 5 FEET
OCCASIONALLY TO 7 FEET.
TUESDAY
NORTHWEST GALES TO 35 KNOTS DIMINISHING TO 10 TO
20 KNOTS. WAVES BUILDING TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET,
THEN SUBSIDING TO 1 TO 3 FEET.
LSZ264-172000-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
400 AM EDT FRI JUL 17 2026
..DENSE SMOKE ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING
EARLY THIS MORNING
SOUTHEAST WINDS 5 TO 15 KNOTS. AREAS OF
SMOKE. A SLIGHT CHANCE OF SHOWERS. WAVES CALM TO 2 FEET.
TODAY
SOUTHEAST WINDS 5 TO 15 KNOTS. SMOKE. A CHANCE OF
SHOWERS AND THUNDERSTORMS. WAVES BUILDING TO 1 TO 3 FEET.
TONIGHT
SOUTH WINDS 5 TO 15 KNOTS VEERING WEST AFTER MIDNIGHT,
THEN BECOMING NORTHWEST 10 TO 20 KNOTS LATE. AREAS OF SMOKE. A
CHANCE OF THUNDERSTORMS THROUGH MIDNIGHT. A CHANCE OF SHOWERS.
WAVES 1 TO 3 FEET.
SATURDAY
NORTHWEST WINDS 10 TO 20 KNOTS DIMINISHING TO 5 TO
15 KNOTS IN THE AFTERNOON, THEN BACKING WEST LATE. SMOKE. WAVES
BUILDING TO 2 TO 4 FEET, THEN SUBSIDING TO CALM TO 2 FEET.
SATURDAY NIGHT
WEST WINDS 5 TO 15 KNOTS BECOMING SOUTHWEST
LESS THAN 10 KNOTS AFTER MIDNIGHT. AREAS OF SMOKE THROUGH
MIDNIGHT. WAVES CALM TO 2 FEET.
SUNDAY
SOUTHWEST WINDS 5 TO 15 KNOTS BACKING SOUTH BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
SUNDAY NIGHT
SOUTH WINDS 10 TO 20 KNOTS BECOMING SOUTHWEST
15 TO 25 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS. WAVES
BUILDING TO 2 TO 4 FEET.
MONDAY
SOUTHWEST WINDS 20 TO 30 KNOTS VEERING WEST. SHOWERS
LIKELY. A CHANCE OF THUNDERSTORMS. A CHANCE OF SHOWERS. WAVES
BUILDING TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET, THEN SUBSIDING TO
3 TO 5 FEET OCCASIONALLY TO 7 FEET.
TUESDAY
NORTHWEST GALES TO 35 KNOTS DIMINISHING TO 15 TO
25 KNOTS. WAVES BUILDING TO 4 TO 7 FEET OCCASIONALLY TO 9 FEET,
THEN SUBSIDING TO 1 TO 3 FEET.
LSZ265-172000-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
400 AM EDT FRI JUL 17 2026
..DENSE SMOKE ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING
EARLY THIS MORNING
SOUTHEAST WINDS 10 TO 20 KNOTS. SMOKE.
WAVES CALM TO 2 FEET.
TODAY
SOUTHEAST WINDS 10 TO 20 KNOTS. SMOKE. A CHANCE OF
SHOWERS THROUGH EARLY AFTERNOON. A CHANCE OF THUNDERSTORMS.
SHOWERS LIKELY BY MID AFTERNOON. WAVES BUILDING TO 1 TO 3 FEET.
TONIGHT
SOUTH WINDS 10 TO 20 KNOTS BECOMING WEST 15 TO
25 KNOTS AFTER MIDNIGHT. AREAS OF SMOKE. A CHANCE OF
THUNDERSTORMS THROUGH MIDNIGHT. A CHANCE OF SHOWERS. WAVES
BUILDING TO 2 TO 4 FEET.
SATURDAY
NORTHWEST WINDS 20 TO 30 KNOTS DIMINISHING TO 10 TO
20 KNOTS. SMOKE. WAVES BUILDING TO 3 TO 5 FEET OCCASIONALLY TO
7 FEET, THEN SUBSIDING TO 1 TO 3 FEET.
SATURDAY NIGHT
NORTHWEST WINDS 10 TO 20 KNOTS BECOMING
SOUTHWEST 5 TO 15 KNOTS AFTER MIDNIGHT. AREAS OF SMOKE THROUGH
MIDNIGHT. WAVES SUBSIDING TO CALM TO 2 FEET.
SUNDAY
SOUTH WINDS 5 TO 15 KNOTS BECOMING SOUTHEAST 10 TO
20 KNOTS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
SUNDAY NIGHT
SOUTH WINDS 15 TO 25 KNOTS BECOMING SOUTHWEST
20 TO 30 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS AFTER
MIDNIGHT. WAVES BUILDING TO 2 TO 4 FEET.
MONDAY
SOUTHWEST GALES TO 35 KNOTS BECOMING WEST GALES TO
40 KNOTS. SHOWERS LIKELY. A CHANCE OF THUNDERSTORMS. A CHANCE OF
SHOWERS. WAVES BUILDING TO 6 TO 9 FEET OCCASIONALLY TO 11 FEET.
TUESDAY
NORTHWEST GALES TO 45 KNOTS. WAVES BUILDING TO 8 TO
11 FEET OCCASIONALLY TO 14 FEET, THEN SUBSIDING TO 5 TO 8 FEET
OCCASIONALLY TO 10 FEET.
LSZ266-172000-
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 EDT FRI JUL 17 2026
..DENSE SMOKE ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING
EARLY THIS MORNING
SOUTHEAST WINDS 5 TO 15 KNOTS. SMOKE. WAVES
CALM TO 2 FEET.
TODAY
SOUTHEAST WINDS 10 TO 20 KNOTS. SMOKE. A CHANCE OF
SHOWERS AND A SLIGHT CHANCE OF THUNDERSTORMS. WAVES BUILDING TO
1 TO 3 FEET.
TONIGHT
SOUTH WINDS 10 TO 20 KNOTS VEERING WEST AFTER
MIDNIGHT, THEN BECOMING NORTHWEST 15 TO 25 KNOTS LATE. SMOKE. A
CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES BUILDING TO 2 TO
4 FEET.
SATURDAY
NORTHWEST WINDS 15 TO 25 KNOTS. PATCHY SMOKE THROUGH
EARLY AFTERNOON, THEN SMOKE BY MID AFTERNOON. WAVES BUILDING TO
3 TO 5 FEET OCCASIONALLY TO 7 FEET, THEN SUBSIDING TO 2 TO
4 FEET.
SATURDAY NIGHT
NORTHWEST WINDS 5 TO 15 KNOTS BACKING WEST
AFTER MIDNIGHT. SMOKE THROUGH MIDNIGHT. WAVES SUBSIDING TO CALM
TO 2 FEET.
SUNDAY
SOUTH WINDS 5 TO 15 KNOTS BACKING SOUTHEAST BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
SUNDAY NIGHT
SOUTH WINDS 10 TO 20 KNOTS INCREASING TO 15 TO
25 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS AFTER MIDNIGHT.
WAVES BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
MONDAY
SOUTH WINDS 20 TO 30 KNOTS BECOMING WEST GALES TO
40 KNOTS. SHOWERS LIKELY. A CHANCE OF THUNDERSTORMS. A CHANCE OF
SHOWERS. WAVES BUILDING TO 6 TO 9 FEET OCCASIONALLY TO 11 FEET.
TUESDAY
NORTHWEST GALES TO 45 KNOTS. WAVES BUILDING TO 9 TO
12 FEET OCCASIONALLY TO 15 FEET, THEN SUBSIDING TO 5 TO 8 FEET
OCCASIONALLY TO 10 FEET.
LSZ267-172000-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
400 AM EDT FRI JUL 17 2026
..DENSE SMOKE ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING
EARLY THIS MORNING
SOUTHEAST WINDS 5 TO 15 KNOTS. SMOKE. WAVES
CALM TO 2 FEET.
TODAY
SOUTHEAST WINDS 5 TO 15 KNOTS INCREASING TO 10 TO
20 KNOTS IN THE AFTERNOON. SMOKE. A CHANCE OF SHOWERS. A SLIGHT
CHANCE OF THUNDERSTORMS BY MID AFTERNOON. WAVES CALM TO 2 FEET.
TONIGHT
SOUTH WINDS 15 TO 25 KNOTS VEERING WEST LATE. SMOKE.
SHOWERS LIKELY THROUGH MIDNIGHT. A CHANCE OF THUNDERSTORMS. A
CHANCE OF SHOWERS AFTER MIDNIGHT. WAVES BUILDING TO 2 TO 4 FEET.
SATURDAY
NORTHWEST WINDS 15 TO 25 KNOTS. AREAS OF SMOKE. WAVES
BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
SATURDAY NIGHT
NORTHWEST WINDS 10 TO 20 KNOTS BECOMING WEST
5 TO 15 KNOTS AFTER MIDNIGHT. AREAS OF SMOKE THROUGH MIDNIGHT.
WAVES SUBSIDING TO CALM TO 2 FEET.
SUNDAY
WEST WINDS 5 TO 15 KNOTS BACKING SOUTHEAST BY MID
AFTERNOON. WAVES CALM TO 2 FEET.
SUNDAY NIGHT
SOUTH WINDS 5 TO 15 KNOTS INCREASING TO 15 TO
25 KNOTS AFTER MIDNIGHT. A CHANCE OF SHOWERS AFTER MIDNIGHT.
WAVES BUILDING TO 3 TO 5 FEET OCCASIONALLY TO 7 FEET.
MONDAY
SOUTH WINDS 20 TO 30 KNOTS VEERING WEST. SHOWERS AND A
CHANCE OF THUNDERSTORMS. WAVES BUILDING TO 4 TO 7 FEET
OCCASIONALLY TO 9 FEET.
TUESDAY
NORTHWEST GALES TO 35 KNOTS. WAVES BUILDING TO 7 TO
11 FEET OCCASIONALLY TO 14 FEET.
LSZ261-171400-
MAFOR 1709/
SUPERIOR WEST 14200 11100 11710 12610. A CHANCE OF SHOWERS THIS
MORNING. A CHANCE OF SHOWERS AND THUNDERSTORMS THIS AFTERNOON. A
CHANCE OF SHOWERS AND THUNDERSTORMS THIS EVENING. WAVES 2 FEET OR
LESS.
SUPERIOR NORTH CENTRAL 12310 12316 11310 11410 11510 11620. A
CHANCE OF THUNDERSTORMS THIS AFTERNOON AND EVENING. WAVES 1 TO 3
FEET.
SUPERIOR SOUTH CENTRAL 11310 12320 11326 11320 11426 11526 11630.
A CHANCE OF THUNDERSTORMS THIS AFTERNOON AND EVENING. WAVES 1 TO
3 FEET TODAY. WAVES 2 TO 4 FEET TONIGHT.
SUPERIOR EAST 11400 11300 13310 11326 11426 11520. A CHANCE OF
THUNDERSTORMS TONIGHT. WAVES 2 FEET OR LESS TODAY. WAVES 2 TO 4
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