037
FZUS63 KMQT 262001
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
401 PM 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.



LSZ162-270800-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
401 PM EDT Sun Jul 26 2026 /301 PM CDT Sun Jul 26 2026/

...DENSE FOG ADVISORY IN EFFECT UNTIL 8 PM EDT /7 PM CDT/ THIS
EVENING...

.LATE THIS AFTERNOON...South winds 5 to 15 knots. Patchy dense
fog. A slight chance of showers and thunderstorms. Some
thunderstorms may be severe. Waves calm to 2 feet.
.TONIGHT...Southwest winds 5 to 15 knots veering west after
midnight, then veering northeast 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 10 to 20 knots diminishing to 5 to
15 knots in the afternoon. A chance of showers and a slight
chance of thunderstorms through early afternoon. Patchy fog. Some
thunderstorms may be severe. Waves 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...North winds less than 10 knots becoming east 5 to
15 knots by mid afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...Northeast winds 5 to 15 knots becoming north
less than 10 knots after midnight. Waves calm to 2 feet.
.WEDNESDAY...East winds less than 10 knots increasing to 5 to
15 knots by mid afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Northeast winds 5 to 15 knots diminishing to
less than 10 knots after midnight. Waves calm to 2 feet.
.THURSDAY...Southwest winds 5 to 15 knots veering north. A chance
of showers. Waves calm to 2 feet.
.FRIDAY...West winds 5 to 15 knots veering north. Waves calm to
2 feet.

$$

LSZ263-270800-
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-
401 PM EDT Sun Jul 26 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING...

.LATE THIS AFTERNOON...South winds 5 to 15 knots. Patchy dense
fog. A slight chance of showers and thunderstorms. Some
thunderstorms may be severe. Waves calm to 2 feet.
.TONIGHT...South winds 5 to 15 knots backing northeast after
midnight. Patchy fog. Patchy smoke after midnight. 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. A slight chance of showers through
early afternoon. Patchy fog. Waves calm to 2 feet.
.MONDAY NIGHT...North winds 5 to 15 knots backing northwest after
midnight, then becoming north less than 10 knots late. Waves calm
to 2 feet.
.TUESDAY...Northeast winds less than 10 knots becoming east 5 to
15 knots by mid afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...East winds less than 10 knots veering southeast
after midnight. Waves calm to 2 feet.
.WEDNESDAY...South winds 5 to 15 knots backing east by mid
afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Southeast winds 5 to 15 knots veering south
after midnight. Waves calm to 2 feet.
.THURSDAY...Southwest winds 5 to 15 knots veering north. A chance
of showers. Waves calm to 2 feet.
.FRIDAY...Northwest winds 5 to 15 knots backing west. Waves calm
to 2 feet.

$$

LSZ264-270800-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
401 PM EDT Sun Jul 26 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING...

.LATE THIS AFTERNOON...Southeast winds 5 to 15 knots. Patchy
dense fog. A chance of showers and thunderstorms. Waves calm to
2 feet.
.TONIGHT...Southeast winds 5 to 15 knots becoming northeast less
than 10 knots after midnight, then increasing to 5 to 15 knots
late. Patchy fog. A slight chance of thunderstorms through
midnight. A slight chance of showers. Waves calm to 2 feet.
.MONDAY...Northeast winds 5 to 15 knots backing northwest late. A
slight chance of showers through early afternoon. Patchy fog.
Waves calm to 2 feet.
.MONDAY NIGHT...Northwest winds 5 to 15 knots veering northeast
late. Waves calm to 2 feet.
.TUESDAY...Northeast winds 5 to 15 knots becoming south less than
10 knots by mid afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...Southwest winds less than 10 knots backing
southeast after midnight. Waves calm to 2 feet.
.WEDNESDAY...South winds 5 to 15 knots backing southeast by mid
afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Southeast winds 5 to 15 knots becoming south
less than 10 knots after midnight. 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.
.FRIDAY...West winds 5 to 15 knots veering north. Waves calm to
2 feet.

$$

LSZ265-270800-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
401 PM EDT Sun Jul 26 2026

.LATE THIS AFTERNOON...East winds 10 to 20 knots. Patchy fog. A
slight chance of showers and thunderstorms. Waves calm to 2 feet.
.TONIGHT...Southeast winds 10 to 20 knots becoming west 5 to
15 knots after midnight, then veering north late. A slight chance
of thunderstorms through midnight. A slight chance of showers.
Patchy fog after midnight. Some thunderstorms may be severe.
Waves calm to 2 feet.
.MONDAY...North winds 10 to 20 knots. Patchy fog through early
afternoon. A chance of showers. Waves calm to 2 feet.
.MONDAY NIGHT...Northwest winds 5 to 15 knots increasing to 10 to
20 knots after midnight, then diminishing to 5 to 15 knots late.
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 increasing to 10 to
20 knots by mid afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Southeast winds 5 to 15 knots veering south
after midnight. Waves calm to 2 feet.
.THURSDAY...Southeast winds 5 to 15 knots veering south. A chance
of showers. Waves calm to 2 feet.
.FRIDAY...East winds 5 to 15 knots backing north. A chance of
showers. Waves calm to 2 feet.

$$

LSZ266-270800-
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-
401 PM EDT Sun Jul 26 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING...

.LATE THIS AFTERNOON...East winds 5 to 15 knots. Patchy dense
fog. A slight chance of showers and thunderstorms. Waves calm to
2 feet.
.TONIGHT...Southeast winds 10 to 20 knots diminishing to 5 to
15 knots after midnight, then backing north late. Patchy fog. A
slight chance of thunderstorms through midnight. A slight chance
of showers. Waves calm to 2 feet.
.MONDAY...North winds 10 to 20 knots. Patchy fog. A slight chance
of showers. Waves calm to 2 feet.
.MONDAY NIGHT...Northwest winds 10 to 20 knots veering north
after midnight. Waves building to 1 to 3 feet.
.TUESDAY...North winds 5 to 15 knots backing northwest by mid
afternoon. Waves subsiding to calm to 2 feet.
.TUESDAY NIGHT...North winds 5 to 15 knots veering southeast
after midnight. Waves calm to 2 feet.
.WEDNESDAY...Southeast winds 5 to 15 knots. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Southeast winds 5 to 15 knots veering south
after midnight. Waves calm to 2 feet.
.THURSDAY...Southeast winds 5 to 15 knots veering south. A chance
of showers. Waves calm to 2 feet.
.FRIDAY...East winds 5 to 15 knots backing north. A chance of
showers. Waves calm to 2 feet.

$$

LSZ267-270800-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
401 PM EDT Sun Jul 26 2026

...DENSE FOG ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING...

.LATE THIS AFTERNOON...East winds 5 to 15 knots. Patchy dense
fog. A slight chance of showers and thunderstorms. Waves calm to
2 feet.
.TONIGHT...Southeast winds 5 to 15 knots becoming south 10 to
20 knots after midnight, then diminishing to 5 to 15 knots late.
A slight chance of showers and thunderstorms through midnight.
Patchy fog. Waves calm to 2 feet.
.MONDAY...Northwest winds 5 to 15 knots increasing to 10 to
20 knots late. Patchy fog through early afternoon. A slight
chance of showers. Waves calm to 2 feet.
.MONDAY NIGHT...Northwest winds 10 to 20 knots veering north
after midnight, then increasing to 15 to 25 knots late. Waves
building to 2 to 4 feet.
.TUESDAY...North winds 15 to 25 knots backing northwest by mid
afternoon. Waves subsiding to 1 to 3 feet, then building to 2 to
4 feet.
.TUESDAY NIGHT...Northwest winds 5 to 15 knots veering north
after midnight. Waves subsiding to calm to 2 feet.
.WEDNESDAY...Northeast winds 5 to 15 knots backing northwest by
mid afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Southeast winds 5 to 15 knots veering south
after midnight. Waves calm to 2 feet.
.THURSDAY...Southeast winds 5 to 15 knots veering south. A chance
of showers. Waves calm to 2 feet.
.FRIDAY...Southeast winds 5 to 15 knots backing north. A chance
of showers. Waves calm to 2 feet.

$$

LSZ261-270200-
MAFOR 2621/
Superior West 11400 19404 11500 11600 11810 11110 13120. A chance
of showers and thunderstorms early this evening. A chance of
showers overnight. A chance of showers Monday morning. Waves 2
feet or less.

Superior North Central 11300 19304 11300 11200 12100 11104 11800
11800 19804. A chance of showers and thunderstorms early this
evening. Waves 1 foot or less.

Superior South Central 11310 19314 11310 11410 11700 11800 13810.
A chance of showers Monday morning. Waves 1 foot or less.

Superior East 11200 19204 12310 11600 11100 11700 12800. A chance
of showers and thunderstorms this evening. 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