689
FZUS63 KMQT 142002
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
401 PM EDT Mon Sep 14 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...

A low around 29.3 inches skirts by Lake Winnipeg into northern
Ontario Monday night into early Tuesday, bringing 29.7 inch
troughing over Lake Superior. 30.2 inch high pressure develops over
the Northern Plains on Tuesday, strengthening to 30.4 inches as it
crosses the Upper Great Lakes on Wednesday. High pressure ridging of
30.2 to 30.3 inches then looks to remain over Lake Superior through
the rest of the workweek.



LSZ162-150800-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
401 PM EDT Mon Sep 14 2026 /301 PM CDT Mon Sep 14 2026/

...GALE WARNING IN EFFECT FROM TUESDAY MORNING THROUGH TUESDAY
AFTERNOON...

.LATE THIS AFTERNOON...Southeast winds 15 to 25 knots. Showers
and a slight chance of thunderstorms. Waves calm to 2 feet.
.TONIGHT...Southeast winds 20 to 30 knots veering south after
midnight, then becoming southwest gales to 35 knots late. Showers
through midnight, then a slight chance of showers after midnight.
Waves building to 3 to 6 feet occasionally to 8 feet.
.TUESDAY...West gales to 45 knots diminishing to 20 to 30 knots
late. Waves building to 7 to 10 feet occasionally to 13 feet,
then subsiding to 3 to 5 feet occasionally to 7 feet.
.TUESDAY NIGHT...West winds 10 to 20 knots becoming northwest
5 to 15 knots after midnight. Waves subsiding to calm to 2 feet.
.WEDNESDAY...North winds less than 10 knots becoming east 5 to
15 knots by mid afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...East winds 5 to 15 knots veering west after
midnight. Waves calm to 2 feet.
.THURSDAY...Northwest winds 5 to 15 knots backing southwest by
mid afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...Northeast winds 5 to 15 knots veering east
after midnight. Waves calm to 2 feet.
.FRIDAY...East winds 10 to 20 knots. A chance of showers. Waves
calm to 2 feet.
.SATURDAY...Northeast winds 20 to 30 knots diminishing to 15 to
25 knots. A chance of showers. Waves building to 2 to 4 feet.

$$

LSZ263-150800-
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 Mon Sep 14 2026

...GALE WARNING IN EFFECT FROM MIDNIGHT EDT TONIGHT THROUGH
TUESDAY EVENING...

.LATE THIS AFTERNOON...Southeast winds 15 to 25 knots. A chance
of showers and a slight chance of thunderstorms. Waves calm to
2 feet.
.TONIGHT...Southeast winds 20 to 30 knots veering south after
midnight, then becoming southwest gales to 35 knots late. Showers
and a slight chance of thunderstorms through midnight, then a
slight chance of showers after midnight. Waves building to 4 to
7 feet occasionally to 9 feet.
.TUESDAY...Southwest gales to 45 knots becoming west gales to
45 knots with a few storm force gusts to 50 knots possible in the
afternoon, then diminishing to gales to 40 knots late. Waves
building to 10 to 14 feet occasionally to 18 feet, then subsiding
to 6 to 9 feet occasionally to 11 feet.
.TUESDAY NIGHT...West winds 15 to 25 knots diminishing to 10 to
20 knots after midnight, then becoming northwest 5 to 15 knots
late. Waves subsiding to calm to 2 feet.
.WEDNESDAY...North winds 5 to 15 knots veering 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...Northwest winds 5 to 15 knots. Waves calm to 2 feet.
.THURSDAY NIGHT...Northeast winds 5 to 15 knots veering east
after midnight. Waves calm to 2 feet.
.FRIDAY...Southeast winds 5 to 15 knots becoming east 10 to
20 knots. A chance of showers. Waves calm to 2 feet.
.SATURDAY...Northeast winds 20 to 30 knots. A chance of showers.
Waves building to 2 to 4 feet.

$$

LSZ264-150800-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
401 PM EDT Mon Sep 14 2026

...GALE WARNING IN EFFECT FROM MIDNIGHT EDT TONIGHT THROUGH
TUESDAY EVENING...

.LATE THIS AFTERNOON...Southeast winds 20 to 30 knots. Waves calm
to 2 feet building to 2 to 4 feet.
.TONIGHT...Southeast winds 20 to 30 knots becoming south gales to
35 knots after midnight, then diminishing to 20 to 30 knots late.
Showers through midnight, then a chance of showers after
midnight. Waves building to 7 to 10 feet occasionally to 13 feet,
then subsiding to 5 to 8 feet occasionally to 10 feet.
.TUESDAY...Southwest gales to 45 knots becoming west gales to
45 knots with a few storm force gusts to 50 knots possible in the
afternoon, then diminishing to gales to 45 knots late. Waves
building to 10 to 14 feet occasionally to 18 feet, then subsiding
to 8 to 11 feet occasionally to 14 feet.
.TUESDAY NIGHT...West winds 20 to 30 knots diminishing to 10 to
20 knots after midnight, then becoming northwest 5 to 15 knots
late. Waves subsiding to 1 to 3 feet.
.WEDNESDAY...North winds less than 10 knots becoming southeast
5 to 15 knots by mid afternoon. Waves subsiding to calm to
2 feet.
.WEDNESDAY NIGHT...South winds 5 to 15 knots. Waves calm to
2 feet.
.THURSDAY...Northwest winds 5 to 15 knots. Waves calm to 2 feet.
.THURSDAY NIGHT...North winds 5 to 15 knots veering east after
midnight. Waves calm to 2 feet.
.FRIDAY...Southeast winds 5 to 15 knots increasing to 10 to
20 knots. A chance of showers. Waves calm to 2 feet.
.SATURDAY...Northeast winds 15 to 25 knots. A chance of showers.
Waves building to 1 to 3 feet, then subsiding to calm to 2 feet.

$$

LSZ265-150800-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
401 PM EDT Mon Sep 14 2026

...GALE WARNING IN EFFECT FROM 8 PM EDT THIS EVENING THROUGH
TUESDAY EVENING...

.LATE THIS AFTERNOON...Southeast winds 20 to 30 knots. Waves 1 to
3 feet building to 2 to 4 feet.
.TONIGHT...South gales to 40 knots. Showers and a slight chance
of thunderstorms through midnight, then a chance of showers after
midnight. Waves building to 6 to 9 feet occasionally to 11 feet,
then subsiding to 3 to 6 feet occasionally to 8 feet.
.TUESDAY...Southwest gales to 40 knots becoming west gales to
45 knots in the afternoon. Waves building to 7 to 10 feet
occasionally to 13 feet, then subsiding to 5 to 8 feet
occasionally to 10 feet.
.TUESDAY NIGHT...West winds 20 to 30 knots diminishing to 15 to
25 knots after midnight, then becoming northwest 10 to 20 knots
late. Waves subsiding to calm to 2 feet.
.WEDNESDAY...Northwest winds 5 to 15 knots veering east by mid
afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...Southeast winds 10 to 20 knots veering
southwest after midnight. Waves calm to 2 feet.
.THURSDAY...West winds 10 to 20 knots veering north by mid
afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...North winds 10 to 20 knots veering east after
midnight. Waves calm to 2 feet.
.FRIDAY...Southeast winds 10 to 20 knots increasing to 15 to
25 knots. A chance of showers. Waves calm to 2 feet.
.SATURDAY...East winds 15 to 25 knots becoming northeast 20 to
30 knots. A chance of showers. Waves building to 3 to 5 feet
occasionally to 7 feet.

$$

LSZ266-150800-
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 Mon Sep 14 2026

...GALE WARNING IN EFFECT FROM 8 PM EDT THIS EVENING THROUGH
TUESDAY EVENING...

.LATE THIS AFTERNOON...Southeast winds 20 to 30 knots. Waves 1 to
3 feet building to 2 to 4 feet.
.TONIGHT...South gales to 40 knots. Showers through midnight. A
slight chance of thunderstorms. A chance of showers after
midnight. Waves building to 7 to 11 feet occasionally to 14 feet.
.TUESDAY...Southwest gales to 40 knots becoming west gales to
45 knots in the afternoon. Waves subsiding to 6 to 9 feet
occasionally to 11 feet, then building to 10 to 14 feet
occasionally to 18 feet.
.TUESDAY NIGHT...West gales to 35 knots becoming northwest 15 to
25 knots after midnight, then diminishing to 10 to 20 knots late.
Waves subsiding to 1 to 3 feet.
.WEDNESDAY...North winds 5 to 15 knots veering east by mid
afternoon. Waves subsiding to calm to 2 feet.
.WEDNESDAY NIGHT...Southeast winds 5 to 15 knots veering south
after midnight. Waves calm to 2 feet.
.THURSDAY...West winds 10 to 20 knots veering northwest by mid
afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...North winds 10 to 20 knots veering east after
midnight. Waves calm to 2 feet.
.FRIDAY...Southeast winds 5 to 15 knots increasing to 10 to
20 knots. A chance of showers. Waves calm to 2 feet.
.SATURDAY...East winds 15 to 25 knots becoming northeast 20 to
30 knots. A chance of showers. Waves building to 3 to 5 feet
occasionally to 7 feet.

$$

LSZ267-150800-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
401 PM EDT Mon Sep 14 2026

...GALE WARNING IN EFFECT FROM 3 AM EDT TUESDAY THROUGH TUESDAY
MORNING...

.LATE THIS AFTERNOON...Southeast winds 10 to 20 knots. Waves calm
to 2 feet.
.TONIGHT...Southeast winds 20 to 30 knots becoming south gales to
40 knots after midnight. A slight chance of thunderstorms through
midnight. Showers. Waves building to 6 to 9 feet occasionally to
11 feet.
.TUESDAY...South gales to 35 knots becoming southwest 20 to
30 knots in the afternoon, then becoming west gales to 40 knots
late. A slight chance of showers through early afternoon. Waves
subsiding to 4 to 7 feet occasionally to 9 feet, then building to
7 to 10 feet occasionally to 13 feet.
.TUESDAY NIGHT...West winds 20 to 30 knots becoming northwest
15 to 25 knots after midnight, then diminishing to 10 to 20 knots
late. Waves subsiding to 2 to 4 feet.
.WEDNESDAY...Northwest winds 5 to 15 knots veering north by mid
afternoon. Waves subsiding to calm to 2 feet.
.WEDNESDAY NIGHT...Southeast winds 5 to 15 knots veering south
after midnight. Waves calm to 2 feet.
.THURSDAY...Southwest winds 10 to 20 knots veering northwest by
mid afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...Northwest winds 10 to 20 knots veering
northeast after midnight. Waves calm to 2 feet.
.FRIDAY...Southeast winds 5 to 15 knots. A chance of showers.
Waves calm to 2 feet.
.SATURDAY...East winds 15 to 25 knots backing northeast. A chance
of showers. Waves building to 3 to 5 feet occasionally to 7 feet.

$$

LSZ261-150200-
MAFOR 1421/
Superior West...GALE WARNING IN EFFECT...11326 11336 11436 11540
12550 11660 11650. Waves 1 to 3 feet building to 3 to 5 feet
tonight. Waves 4 to 7 feet building to 7 to 11 feet Tuesday.

Superior North Central...GALE WARNING IN EFFECT...12340 11456
11450 11440 11550 11570 11670. Waves 1 to 2 feet building to 6 to
10 feet tonight. Waves 6 to 10 feet building to 10 to 14 feet
Tuesday.

Superior South Central...GALE WARNING IN EFFECT...11340 12456
12450 11550 11560 11660. Waves 2 to 3 feet building to 6 to 9
feet tonight. Waves 5 to 8 feet building to 6 to 10 feet Tuesday.

Superior East...GALE WARNING IN EFFECT...11320 11340 11446 12456
11450 11540 11650. Waves 1 to 3 feet building to 5 to 9 feet
tonight. Waves 7 to 10 feet subsiding to 5 to 9 feet Tuesday.

$$

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