972
FZUS63 KMQT 262101
GLFLS

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

A strong clipper low averaging 29.2 inches moves across northern
Ontario Friday and Friday night, sending a 29.4 inch trough across
the lake. High pressure builds over the lake this weekend,
strengthening to 30.6 inches by Sunday. Ridging continues into early
next week ahead of a weak 30.1 inch trough Tuesday.


LSZ162-270900-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
401 PM EST Thu Feb 26 2026 /301 PM CST Thu Feb 26 2026/

...GALE WARNING IN EFFECT FROM FRIDAY AFTERNOON THROUGH LATE
FRIDAY NIGHT...
...HEAVY FREEZING SPRAY WARNING IN EFFECT FROM FRIDAY EVENING
THROUGH SATURDAY MORNING...

.LATE THIS AFTERNOON...Southwest winds 5 to 15 knots. Waves calm
to 2 feet.
.TONIGHT...Southwest winds 5 to 15 knots increasing to 10 to
20 knots late. Waves calm to 2 feet.
.FRIDAY...Southwest winds 15 to 25 knots increasing to gales to
35 knots by late morning, then becoming west gales to 45 knots by
mid afternoon. Waves building to 7 to 10 feet occasionally to
13 feet.
.FRIDAY NIGHT...West gales to 45 knots becoming northwest gales
to 35 knots by midnight, then diminishing to 15 to 25 knots late.
Heavy freezing spray in the evening. Waves building to 8 to
11 feet occasionally to 14 feet, then subsiding to 2 to 4 feet.
.SATURDAY...Northwest winds 10 to 20 knots. Waves subsiding to
calm to 2 feet.
.SATURDAY NIGHT...Northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. Waves calm to 2 feet.
.SUNDAY...Northwest winds 5 to 15 knots backing west in the
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...Southeast winds 5 to 15 knots veering south after
midnight. Waves building to 1 to 3 feet.
.MONDAY...Southwest winds 10 to 20 knots increasing to gales to
35 knots. Waves building to 4 to 8 feet occasionally to 10 feet.
.TUESDAY...Southwest winds 20 to 30 knots becoming west 15 to
25 knots. Waves subsiding to calm to 2 feet, then building to
1 to 3 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ263-270900-
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 EST Thu Feb 26 2026

...GALE WARNING IN EFFECT FROM FRIDAY AFTERNOON THROUGH LATE
FRIDAY NIGHT...
...HEAVY FREEZING SPRAY WARNING IN EFFECT FROM FRIDAY EVENING
THROUGH SATURDAY MORNING...

.LATE THIS AFTERNOON...Southwest winds 5 to 15 knots. Waves calm
to 2 feet.
.TONIGHT...Southwest winds 5 to 15 knots increasing to 10 to
20 knots late. Waves calm to 2 feet.
.FRIDAY...Southwest winds 15 to 25 knots increasing to gales to
35 knots by late morning, then becoming west gales to 45 knots by
mid afternoon. Waves building to 10 to 14 feet occasionally to
18 feet.
.FRIDAY NIGHT...West gales to 45 knots becoming northwest gales
to 40 knots by midnight, then diminishing to 20 to 30 knots late.
Heavy freezing spray. Waves building to 11 to 15 feet
occasionally to 19 feet, then subsiding to 5 to 8 feet
occasionally to 10 feet.
.SATURDAY...Northwest winds 15 to 25 knots diminishing to 5 to
15 knots in the afternoon. Waves subsiding to calm to 2 feet.
.SATURDAY NIGHT...Northwest winds 5 to 15 knots veering north
after midnight. Waves building to 1 to 3 feet, then subsiding to
calm to 2 feet.
.SUNDAY...Northwest winds 5 to 15 knots backing west in the
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...South winds 5 to 15 knots. Waves building to 2 to
4 feet.
.MONDAY...Southwest winds 10 to 20 knots increasing to gales to
35 knots. Waves building to 7 to 11 feet occasionally to 14 feet.
.TUESDAY...Southwest winds 20 to 30 knots veering west. Waves
subsiding to 2 to 4 feet, then building to 3 to 6 feet
occasionally to 8 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ264-270900-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
401 PM EST Thu Feb 26 2026

...STORM WARNING IN EFFECT FROM FRIDAY AFTERNOON THROUGH SATURDAY
MORNING...
...HEAVY FREEZING SPRAY WARNING IN EFFECT FROM FRIDAY EVENING
THROUGH SATURDAY AFTERNOON...

.LATE THIS AFTERNOON...Southwest winds 5 to 15 knots. A slight
chance of snow showers. Waves calm to 2 feet.
.TONIGHT...Southwest winds 5 to 15 knots increasing to 10 to
20 knots late. A slight chance of snow showers after midnight.
Waves calm to 2 feet.
.FRIDAY...Southwest winds 15 to 25 knots increasing to gales to
35 knots by late morning, then becoming west gales to 45 knots by
mid afternoon. Waves building to 10 to 14 feet occasionally to
18 feet.
.FRIDAY NIGHT...West storm force winds to 55 knots veering
northwest by midnight, then diminishing to gales to 40 knots
late. Heavy freezing spray. Waves building to 15 to 20 feet
occasionally to 25 feet, then subsiding to 9 to 12 feet
occasionally to 15 feet.
.SATURDAY...Northwest gales to 35 knots diminishing to 10 to
20 knots in the afternoon. Heavy freezing spray in the morning.
Waves subsiding to 2 to 4 feet.
.SATURDAY NIGHT...Northwest winds 10 to 20 knots. Waves subsiding
to 1 to 3 feet.
.SUNDAY...Northwest winds 5 to 15 knots backing west in the
afternoon. Waves subsiding to calm to 2 feet.
.SUNDAY NIGHT...West winds 5 to 15 knots backing southwest after
midnight. Waves building to 2 to 4 feet.
.MONDAY...Southwest winds 10 to 20 knots increasing to gales to
35 knots. Freezing spray. Waves building to 9 to 12 feet
occasionally to 15 feet.
.TUESDAY...Southwest gales to 35 knots veering west. Waves
subsiding to 2 to 4 feet, then building to 4 to 7 feet
occasionally to 9 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ265-270900-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
401 PM EST Thu Feb 26 2026

...STORM WARNING IN EFFECT FROM FRIDAY AFTERNOON THROUGH SATURDAY
MORNING...
...HEAVY FREEZING SPRAY WARNING IN EFFECT FROM FRIDAY EVENING
THROUGH SATURDAY AFTERNOON...

.LATE THIS AFTERNOON...South winds 10 to 20 knots. A slight
chance of snow showers. Waves calm to 2 feet.
.TONIGHT...Southwest winds 10 to 20 knots. Waves calm to 2 feet.
.FRIDAY...Southwest winds 15 to 25 knots increasing to gales to
35 knots by late morning, then becoming west gales to 45 knots by
mid afternoon. Waves building to 4 to 7 feet occasionally to
9 feet.
.FRIDAY NIGHT...West storm force winds to 55 knots becoming
northwest storm force winds to 50 knots by midnight, then
diminishing to gales to 40 knots late. Heavy freezing spray.
Waves building to 6 to 10 feet occasionally to 13 feet.
.SATURDAY...Northwest gales to 35 knots diminishing to 15 to
25 knots in the afternoon. Heavy freezing spray in the morning. A
slight chance of snow showers in the afternoon. Waves subsiding
to 2 to 4 feet.
.SATURDAY NIGHT...Northwest winds 15 to 25 knots. Waves subsiding
to 1 to 3 feet.
.SUNDAY...Northwest winds 10 to 20 knots backing west in the
afternoon. Waves subsiding to calm to 2 feet.
.SUNDAY NIGHT...West winds 10 to 20 knots backing southwest after
midnight. Waves calm to 2 feet.
.MONDAY...South winds 15 to 25 knots becoming southwest 20 to
30 knots. Waves building to 2 to 4 feet.
.TUESDAY...Southwest winds 20 to 30 knots becoming west gales to
35 knots. Waves subsiding to calm to 2 feet, then building to
1 to 3 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ266-270900-
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 EST Thu Feb 26 2026

...STORM WARNING IN EFFECT FROM FRIDAY AFTERNOON THROUGH SATURDAY
MORNING...
...HEAVY FREEZING SPRAY WARNING IN EFFECT FROM FRIDAY EVENING
THROUGH LATE SATURDAY NIGHT...

.LATE THIS AFTERNOON...South winds 10 to 20 knots. A chance of
snow showers. Waves 2 to 4 feet.
.TONIGHT...Southwest winds 10 to 20 knots increasing to 15 to
25 knots late. A slight chance of snow showers in the evening.
Waves subsiding to calm to 2 feet.
.FRIDAY...South winds 20 to 30 knots increasing to gales to
35 knots by late morning, then becoming southwest storm force
winds to 55 knots by mid afternoon. A slight chance of snow
showers in the morning. Waves building to 10 to 14 feet
occasionally to 18 feet.
.FRIDAY NIGHT...West storm force winds to 55 knots veering
northwest by midnight, then diminishing to gales to 45 knots
late. Heavy freezing spray. Waves building to 17 to 22 feet
occasionally to 28 feet, then subsiding to 15 to 20 feet
occasionally to 25 feet.
.SATURDAY...Northwest gales to 35 knots diminishing to 20 to
30 knots in the afternoon. Heavy freezing spray. A slight chance
of snow showers. Waves subsiding to 4 to 7 feet occasionally to
9 feet.
.SATURDAY NIGHT...Northwest winds 20 to 30 knots diminishing to
15 to 25 knots after midnight. Heavy freezing spray. Waves
subsiding to 3 to 5 feet occasionally to 7 feet.
.SUNDAY...Northwest winds 10 to 20 knots backing west in the
afternoon. Waves subsiding to 1 to 3 feet.
.SUNDAY NIGHT...West winds 10 to 20 knots backing southwest after
midnight. Waves building to 3 to 6 feet occasionally to 8 feet.
.MONDAY...South winds 15 to 25 knots becoming southwest gales to
35 knots. Freezing spray. Waves building to 9 to 12 feet
occasionally to 15 feet.
.TUESDAY...Southwest gales to 35 knots veering west. Waves
subsiding to 3 to 5 feet occasionally to 7 feet, then building to
5 to 8 feet occasionally to 10 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ267-270900-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
401 PM EST Thu Feb 26 2026

...STORM WARNING IN EFFECT FROM FRIDAY AFTERNOON THROUGH SATURDAY
MORNING...
...HEAVY FREEZING SPRAY WARNING IN EFFECT FROM FRIDAY EVENING
THROUGH LATE SATURDAY NIGHT...

.LATE THIS AFTERNOON...South winds 10 to 20 knots. A chance of
snow showers. Waves 2 to 4 feet.
.TONIGHT...South winds 10 to 20 knots veering southwest by
midnight. A chance of snow showers. Waves subsiding to calm to
2 feet.
.FRIDAY...South winds 15 to 25 knots increasing to 20 to 30 knots
by late morning, then becoming southwest gales to 45 knots by mid
afternoon. A slight chance of snow showers. A slight chance of
rain showers in the afternoon. Waves building to 7 to 10 feet
occasionally to 13 feet.
.FRIDAY NIGHT...West gales to 45 knots becoming northwest storm
force winds to 50 knots by midnight, then diminishing to gales to
45 knots late. A slight chance of snow showers in the evening.
Heavy freezing spray. Waves building to 17 to 22 feet
occasionally to 28 feet, then subsiding to 15 to 20 feet
occasionally to 25 feet.
.SATURDAY...Northwest gales to 35 knots diminishing to 20 to
30 knots in the afternoon. Heavy freezing spray. A slight chance
of snow showers. Waves subsiding to 4 to 7 feet occasionally to
9 feet.
.SATURDAY NIGHT...Northwest winds 15 to 25 knots becoming north
10 to 20 knots after midnight. Heavy freezing spray in the
evening. Waves subsiding to 2 to 4 feet.
.SUNDAY...North winds 5 to 15 knots backing west in the
afternoon. Waves subsiding to 1 to 3 feet.
.SUNDAY NIGHT...South winds 5 to 15 knots increasing to 10 to
20 knots after midnight. Waves building to 3 to 6 feet
occasionally to 8 feet.
.MONDAY...South winds 10 to 20 knots increasing to 20 to
30 knots. Freezing spray. Waves building to 7 to 11 feet
occasionally to 14 feet.
.TUESDAY...Southwest winds 20 to 30 knots becoming west gales to
35 knots. Waves subsiding to 3 to 5 feet occasionally to 7 feet,
then building to 5 to 8 feet occasionally to 10 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ261-270300-
MAFOR 2622/
Superior West...GALE WARNING IN EFFECT...12500 11510 12520 11530
11550 11650. Waves 2 feet or less tonight. Waves 1 to 3 feet
building to 6 to 9 feet Friday.

Superior North Central...STORM WARNING IN EFFECT...12500 11510
11520 11530 11540 11550 11660. Waves 1 to 2 feet tonight. Waves 1
to 3 feet building to 7 to 10 feet Friday.

Superior South Central...STORM WARNING IN EFFECT...11410 12500
12520 11530 11540 11550. A chance of snow showers this evening.
Waves 2 feet or less tonight. Waves 1 to 3 feet building to 4 to
7 feet Friday. Wave heights are for ice free areas.

Superior East...STORM WARNING IN EFFECT...11420 13510 12530 11440
11560. A chance of snow showers this evening. Waves 2 to 4 feet
subsiding to 1 to 2 feet tonight. Waves 2 to 4 feet building to 5
to 9 feet Friday.

$$

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