300
FZUS63 KMQT 260807 CCA
GLFLS

Open Lake Forecast for Lake Superior...CORRECTED
National Weather Service Marquette MI
407 AM EDT Sun Jul 26 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...

Troughing around 29.8 inches over Lake Superior deepens to 29.7
inches by tonight. A 29.6 to 29.7 inch Clipper low then moves into
the Upper Great Lakes or Upper Midwest by Monday before departing
east towards the Mid-Atlantic on Tuesday. Behind the Clipper, weak
ridging of 29.9 to 30.0 inches returns to Lake Superior Tuesday into
Thursday.

LSZ162-262000-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
407 AM EDT Sun Jul 26 2026 /307 AM CDT Sun Jul 26 2026/

...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM EDT /10 AM CDT/ THIS
MORNING...

.EARLY THIS MORNING...North winds less than 10 knots. Patchy dense
fog. Waves calm to 2 feet.
.TODAY...Southeast winds less than 10 knots becoming northeast
5 to 15 knots in the afternoon, then veering east late. Patchy dense
fog early. A slight chance of showers and thunderstorms by mid
afternoon. Some thunderstorms may be severe. Waves calm to 2 feet.
.TONIGHT...Northeast winds 5 to 15 knots veering east late.
Patchy fog and smoke. A chance of showers and a slight chance of
thunderstorms. Some thunderstorms may be severe. Waves calm to
2 feet.
.MONDAY...Northeast winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon, then diminishing to 5 to 15 knots
late. Areas of dense fog through early afternoon. A slight chance
of showers and thunderstorms. Some thunderstorms may be severe.
Waves building to 1 to 3 feet, then subsiding to calm to 2 feet.
.MONDAY NIGHT...North winds 5 to 15 knots diminishing to less
than 10 knots after midnight. Waves calm to 2 feet.
.TUESDAY...Northeast winds less than 10 knots increasing to 5 to
15 knots by mid afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...Northeast winds 5 to 15 knots diminishing to
less than 10 knots after midnight. Waves calm to 2 feet.
.WEDNESDAY...Northeast winds 5 to 15 knots. Waves calm to 2 feet.
.THURSDAY...Northeast winds 5 to 15 knots backing north. A chance
of showers. Waves calm to 2 feet.

$$

LSZ263-262000-
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-
407 AM EDT Sun Jul 26 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM EDT THIS MORNING...

.EARLY THIS MORNING...Southwest winds less than 10 knots. Patchy
dense fog. Waves calm to 2 feet.
.TODAY...South winds less than 10 knots becoming northeast 5 to
15 knots in the afternoon, then veering east late. Patchy dense fog
early. Patchy smoke by mid afternoon. A slight chance of showers and
thunderstorms by mid afternoon. Some thunderstorms may be severe.
Waves calm to 2 feet.
.TONIGHT...East winds 5 to 15 knots backing northeast after
midnight. Patchy smoke through midnight. Patchy fog. A slight
chance of showers and thunderstorms. Some thunderstorms may be
severe. Waves calm to 2 feet.
.MONDAY...Northeast winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. Areas of dense fog through early
afternoon. A slight chance of showers and thunderstorms. Some
thunderstorms may be severe. Waves building to 1 to 3 feet, then
subsiding to calm to 2 feet.
.MONDAY NIGHT...North winds 5 to 15 knots diminishing to less
than 10 knots after midnight. Waves calm to 2 feet.
.TUESDAY...Northeast winds less than 10 knots. Waves calm to
2 feet.
.TUESDAY NIGHT...East winds less than 10 knots veering southeast
after midnight. Waves calm to 2 feet.
.WEDNESDAY...East winds less than 10 knots becoming southeast
5 to 15 knots. Waves calm to 2 feet.
.THURSDAY...South winds 5 to 15 knots veering west. A chance of
showers. Waves calm to 2 feet.

$$

LSZ264-262000-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
407 AM EDT Sun Jul 26 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM EDT THIS MORNING...

.EARLY THIS MORNING...Southwest winds less than 10 knots. Areas
of dense fog. Waves calm to 2 feet.
.TODAY...South winds less than 10 knots becoming southeast 5 to
15 knots in the afternoon. Areas of dense fog through early
afternoon. Patchy fog by mid afternoon. A slight chance of
showers and thunderstorms by mid afternoon. Some thunderstorms
may be severe. Waves calm to 2 feet.
.TONIGHT...East winds 5 to 15 knots becoming northeast less than
10 knots after midnight, then increasing to 5 to 15 knots late.
Patchy smoke through midnight. Patchy fog. A slight chance of
showers and thunderstorms. Some thunderstorms may be severe.
Waves calm to 2 feet.
.MONDAY...Northeast winds 5 to 15 knots backing north late. Areas
of dense fog through early afternoon. A slight chance of showers
and thunderstorms. Some thunderstorms may be severe through early
afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...North winds 5 to 15 knots. Waves calm to 2 feet.
.TUESDAY...Northeast winds 5 to 15 knots diminishing to less than
10 knots by mid afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...Northwest winds less than 10 knots backing
southeast after midnight. Waves calm to 2 feet.
.WEDNESDAY...Southeast winds less than 10 knots increasing to
5 to 15 knots. Waves calm to 2 feet.
.THURSDAY...South winds less than 10 knots increasing to 5 to
15 knots. A chance of showers. Waves calm to 2 feet.

$$

LSZ265-262000-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
407 AM EDT Sun Jul 26 2026

.EARLY THIS MORNING...Southwest winds 5 to 15 knots. Patchy fog.
Waves calm to 2 feet.
.TODAY...Southeast winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon, then backing east late. Patchy fog.
Waves calm to 2 feet.
.TONIGHT...East winds 10 to 20 knots becoming northeast 5 to
15 knots after midnight, then backing north late. Patchy fog. A
slight chance of showers and thunderstorms. Some thunderstorms
may be severe. Waves calm to 2 feet.
.MONDAY...Northeast winds 10 to 20 knots backing north late.
Areas of dense fog through early afternoon. A slight chance of
showers and thunderstorms. Some thunderstorms may be severe.
Waves calm to 2 feet.
.MONDAY NIGHT...North winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves calm to 2 feet.
.TUESDAY...North winds 5 to 15 knots. Waves calm to 2 feet.
.TUESDAY NIGHT...Northwest winds 5 to 15 knots backing southeast
after midnight. Waves calm to 2 feet.
.WEDNESDAY...Southeast winds 5 to 15 knots veering south. Waves
calm to 2 feet.
.THURSDAY...Southeast winds 5 to 15 knots becoming southwest
10 to 20 knots. A chance of showers. Waves calm to 2 feet.

$$

LSZ266-262000-
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-
407 AM EDT Sun Jul 26 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM EDT THIS MORNING...

.EARLY THIS MORNING...Southwest winds 5 to 15 knots. Areas of
dense fog. Waves calm to 2 feet.
.TODAY...South winds 5 to 15 knots backing east late. Areas of
dense fog through early afternoon. Patchy fog by mid afternoon. A
slight chance of showers and thunderstorms by mid afternoon. Some
thunderstorms may be severe. Waves calm to 2 feet.
.TONIGHT...Southeast winds 5 to 15 knots backing northeast late.
Patchy fog. A slight chance of showers and thunderstorms. Some
thunderstorms may be severe. Waves calm to 2 feet.
.MONDAY...North winds 5 to 15 knots increasing to 10 to 20 knots
in the afternoon. Areas of dense fog through early afternoon. A
slight chance of showers and thunderstorms. Some thunderstorms
may be severe through early afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...North winds 10 to 20 knots. A slight chance of
showers through midnight. Waves building to 2 to 4 feet.
.TUESDAY...North winds 10 to 20 knots becoming northwest 5 to
15 knots by mid afternoon. Waves subsiding to calm to 2 feet.
.TUESDAY NIGHT...North winds 5 to 15 knots. Waves calm to 2 feet.
.WEDNESDAY...Southeast winds 5 to 15 knots veering south. Waves
calm to 2 feet.
.THURSDAY...South winds 5 to 15 knots. Waves calm to 2 feet.

$$

LSZ267-262000-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
407 AM EDT Sun Jul 26 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM EDT THIS MORNING...

.EARLY THIS MORNING...South winds less than 10 knots. Areas of
dense fog. Waves calm to 2 feet.
.TODAY...South winds less than 10 knots becoming southeast 5 to
15 knots in the afternoon, then backing east late. Areas of dense
fog through early afternoon, then patchy fog by mid afternoon.
Waves calm to 2 feet.
.TONIGHT...East winds 5 to 15 knots becoming southeast 10 to
20 knots after midnight, then diminishing to 5 to 15 knots late.
Patchy fog. A chance of showers and thunderstorms. Waves calm to
2 feet.
.MONDAY...North winds 5 to 15 knots becoming northwest 10 to
20 knots late. Areas of dense fog through early afternoon. A
slight chance of showers and thunderstorms. Some thunderstorms
may be severe through early afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...North winds 10 to 20 knots increasing to 15 to
25 knots after midnight. A slight chance of showers through
midnight. Waves building to 2 to 4 feet.
.TUESDAY...North winds 10 to 20 knots backing northwest by mid
afternoon. Waves subsiding to 1 to 3 feet, then building to 2 to
4 feet.
.TUESDAY NIGHT...North winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves subsiding to calm to 2 feet.
.WEDNESDAY...Northwest winds 5 to 15 knots backing south. Waves
calm to 2 feet.
.THURSDAY...Southeast winds 5 to 15 knots veering south. Waves
calm to 2 feet.

$$

LSZ261-261400-
MAFOR 2609/
Superior West 11500 19504 11304 11300 11100 12200 11100 11110. Waves
1 foot or less.

Superior North Central 11504 11404 13304 12200 11100. Waves 1
foot or less.

Superior South Central 11503 19504 11403 19404 11310 13210 11310
11800. Waves 1 foot or less.

Superior East 11504 11404 11400 11304 11200 19204 12310 11300. A
chance of showers and thunderstorms this evening, then a chance
of showers overnight. Waves 1 foot or less.

$$

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