855
FZUS63 KMQT 140807 CCA
GLFLS

Open Lake Forecast for Lake Superior...CORRECTED
National Weather Service Marquette MI
407 AM 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...

30.2 inch ridging over the Upper Great Lakes remains through the
remainder of the morning hours. 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.

LSZ162-142000-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
407 AM EDT Mon Sep 14 2026 /307 AM CDT Mon Sep 14 2026/

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

.EARLY THIS MORNING...South winds less than 10 knots. Waves calm
to 2 feet.
.TODAY...South winds 5 to 15 knots becoming southeast 10 to
20 knots in the afternoon, then increasing to 15 to 25 knots
late. Showers and a slight chance of thunderstorms by mid
afternoon. Waves calm to 2 feet.
.TONIGHT...South winds 20 to 30 knots veering southwest 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...West gales to 40 knots diminishing to 20 to 30 knots
late. Waves building to 8 to 11 feet occasionally to 14 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...Northeast winds 5 to 15 knots veering east by mid
afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...East winds 5 to 15 knots backing northwest
after midnight. Waves calm to 2 feet.
.THURSDAY...Northwest winds 5 to 15 knots veering northeast.
Waves calm to 2 feet.
.FRIDAY...East winds 5 to 15 knots becoming northeast 10 to
20 knots. A chance of showers. Waves calm to 2 feet.

$$

LSZ263-142000-
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 Mon Sep 14 2026

...GALE WARNING IN EFFECT FROM LATE TONIGHT THROUGH TUESDAY
EVENING...

.EARLY THIS MORNING...West winds 5 to 15 knots. Waves calm to
2 feet.
.TODAY...South winds 5 to 15 knots increasing to 10 to 20 knots
in the afternoon, then becoming southeast 15 to 25 knots late. A
chance of showers and a slight chance of thunderstorms by mid
afternoon. Waves building to 1 to 3 feet.
.TONIGHT...South gales to 35 knots veering southwest late.
Showers and a slight chance of thunderstorms through midnight,
then a chance of showers after midnight. Waves building to 4 to
7 feet occasionally to 9 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.
.TUESDAY...Southwest gales to 45 knots veering west in the
afternoon. 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 20 to 30 knots becoming northwest
5 to 15 knots after midnight. 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...South winds 5 to 15 knots veering southwest
after midnight. Waves calm to 2 feet.
.THURSDAY...Northwest winds 5 to 15 knots backing southeast.
Waves calm to 2 feet.
.FRIDAY...South winds 5 to 15 knots becoming east 10 to 20 knots.
A chance of showers. Waves calm to 2 feet.

$$

LSZ264-142000-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
407 AM EDT Mon Sep 14 2026

...GALE WARNING IN EFFECT FROM LATE TONIGHT THROUGH TUESDAY
EVENING...

.EARLY THIS MORNING...West winds 5 to 15 knots. Waves calm to
2 feet.
.TODAY...Southwest winds 5 to 15 knots backing south in the
afternoon, then becoming southeast 20 to 30 knots late. Waves
building to 2 to 4 feet.
.TONIGHT...South gales to 35 knots. 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 veering west in the
afternoon. Waves building to 11 to 15 feet occasionally to
19 feet, then subsiding to 8 to 11 feet occasionally to 14 feet.
.TUESDAY NIGHT...West winds 20 to 30 knots becoming northwest
5 to 15 knots after midnight. Waves subsiding to calm to 2 feet.
.WEDNESDAY...North winds less than 10 knots becoming south 5 to
15 knots by mid afternoon. Waves calm to 2 feet.
.WEDNESDAY NIGHT...South winds 5 to 15 knots veering southwest
after midnight. Waves calm to 2 feet.
.THURSDAY...West winds 5 to 15 knots backing south. Waves calm to
2 feet.
.FRIDAY...South winds 5 to 15 knots increasing to 10 to 20 knots.
A chance of showers. Waves calm to 2 feet.

$$

LSZ265-142000-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
407 AM EDT Mon Sep 14 2026

...GALE WARNING IN EFFECT FROM THIS EVENING THROUGH TUESDAY
EVENING...

.EARLY THIS MORNING...West winds 10 to 20 knots. Waves calm to
2 feet.
.TODAY...Southwest winds 5 to 15 knots becoming southeast 10 to
20 knots in the afternoon, then increasing to 20 to 30 knots
late. Waves building to 3 to 5 feet occasionally to 7 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 4 to 7 feet occasionally to 9 feet.
.TUESDAY...Southwest gales to 40 knots becoming west gales to
45 knots in the afternoon. Waves subsiding to 3 to 6 feet
occasionally to 8 feet, then building to 6 to 9 feet occasionally
to 11 feet.
.TUESDAY NIGHT...West winds 20 to 30 knots becoming northwest
10 to 20 knots after midnight. 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 becoming
southwest 5 to 15 knots after midnight. Waves calm to 2 feet.
.THURSDAY...West winds 10 to 20 knots backing south. Waves calm
to 2 feet.
.FRIDAY...South winds 10 to 20 knots. A chance of showers. Waves
calm to 2 feet.

$$

LSZ266-142000-
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 Mon Sep 14 2026

...GALE WARNING IN EFFECT FROM THIS EVENING THROUGH TUESDAY
EVENING...

.EARLY THIS MORNING...Northwest winds 10 to 20 knots. Waves 1 to
3 feet.
.TODAY...West winds 5 to 15 knots backing south in the afternoon,
then becoming southeast 20 to 30 knots late. Waves subsiding to
calm to 2 feet, then 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 8 to 11 feet occasionally to 14 feet.
.TUESDAY...Southwest gales to 40 knots veering west 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 winds 20 to 30 knots becoming northwest
10 to 20 knots after midnight. 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
southwest after midnight. Waves calm to 2 feet.
.THURSDAY...Northwest winds 5 to 15 knots backing south. Waves
calm to 2 feet.
.FRIDAY...South winds 5 to 15 knots increasing to 10 to 20 knots.
A chance of showers. Waves calm to 2 feet.

$$

LSZ267-142000-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
407 AM EDT Mon Sep 14 2026

...GALE WARNING IN EFFECT FROM LATE TONIGHT THROUGH TUESDAY
MORNING...

.EARLY THIS MORNING...Northwest winds 10 to 20 knots. Waves 2 to
4 feet subsiding to 1 to 3 feet.
.TODAY...West winds 5 to 15 knots backing south in the afternoon,
then becoming southeast 10 to 20 knots late. Waves subsiding to
calm to 2 feet.
.TONIGHT...South winds 20 to 30 knots increasing to gales to
40 knots after midnight. A chance of showers through midnight,
then showers and a slight chance of thunderstorms after midnight.
Waves building to 7 to 10 feet occasionally to 13 feet.
.TUESDAY...South gales to 35 knots becoming southwest 20 to
30 knots in the afternoon, then becoming west gales to 35 knots
late. A 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
10 to 20 knots after midnight. 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...Northwest winds 5 to 15 knots. Waves calm to 2 feet.
.FRIDAY...Southeast winds 5 to 15 knots veering south. A chance
of showers. Waves calm to 2 feet.

$$

LSZ261-141400-
MAFOR 1409/
Superior West...GALE WARNING IN EFFECT...11500 12410 11310 12336
11446 11540 19550. Waves 1 foot or less today. Waves 1 to 3 feet
building to 3 to 5 feet tonight.

Superior North Central...GALE WARNING IN EFFECT...11600 11500
11410 11420 11340 11356 11456 11450. Waves 2 feet or less today.
Waves 3 to 5 feet building to 6 to 10 feet tonight.

Superior South Central...GALE WARNING IN EFFECT...11700 11600
11410 11330 11340 12456 11450. Waves 1 to 3 feet today. Waves 3
to 5 feet building to 6 to 9 feet tonight.

Superior East...GALE WARNING IN EFFECT...11700 11600 11500 11400
11320 11340 11446 11456. Waves 1 to 3 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