fzus63 kdtx 231423
glflh 
expires:202602232300;;124261

open lake forecast for lake huron
national weather service detroit/pontiac mi
923 am est mon feb 23 2026

for waters beyond five nautical miles off shore on lake huron

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...strong low pressure tracks up the east coast while a
ridge builds in across the midwest today, with gusty northwest
flow across the great lakes. this leads to heavy freezing spray
through tonight. the next low pressure tracks across the northern
great lakes late tuesday into wednesday.


lhz361-362-232300-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
lake huron from presque isle light to sturgeon point mi beyond
5nm off shore-
923 am est mon feb 23 2026

...heavy freezing spray warning in effect through this evening...

.rest of today...north winds 20 to 25 knots. gusts to 30 knots
late in the morning. a chance of snow showers. heavy freezing
spray. waves 8 to 12 feet. waves occasionally around 15 feet. 
.tonight...north winds 15 to 20 knots decreasing to 5 to
10 knots. heavy freezing spray in the evening. waves 5 to 7 feet
subsiding to 2 to 4 feet early in the morning. waves occasionally
around 10 feet. 
.tuesday...north winds 5 to 10 knots becoming southeast 10 to
15 knots in the late morning and early afternoon...then becoming
south 20 to 25 knots with gusts to around 30 knots early in the
afternoon. a chance of snow in the afternoon. freezing spray in
the afternoon. waves 1 to 3 feet building to 6 to 9 feet. waves
occasionally around 12 feet. 
.tuesday night...southeast winds 20 to 25 knots with gusts to
around 30 knots becoming southwest 15 to 20 knots after midnight.
snow in the evening. freezing spray in the evening. snow may be
heavy at times in the evening. waves 8 to 12 feet. waves
occasionally around 15 feet. 
.wednesday...west winds 20 to 25 knots decreasing to 10 to
15 knots. freezing spray. waves 5 to 7 feet. waves occasionally
around 10 feet. 
.thursday...west winds 5 to 10 knots backing to the east until
early evening...then becoming southwest 10 to 15 knots by
midnight. waves 2 to 4 feet subsiding to 1 to 3 feet until early
evening...then building to 2 to 4 feet by midnight. 
.friday...west winds 10 to 15 knots becoming southwest 15 to
20 knots in the late morning and early afternoon...then becoming
south 20 to 25 knots with gusts to around 30 knots. waves 3 to 5 
feet building to 8 to 12 feet. waves occasionally around 15 feet. 


$$

fzus63 kdtx 231423
glflh 
expires:202602232300;;124262

open lake forecast for lake huron
national weather service detroit/pontiac mi
923 am est mon feb 23 2026

for waters beyond five nautical miles off shore on lake huron

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...strong low pressure tracks up the east coast while a
ridge builds in across the midwest today, with gusty northwest
flow across the great lakes. this leads to heavy freezing spray
through tonight. the next low pressure tracks across the northern
great lakes late tuesday into wednesday.


lhz363-462-232300-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
lake huron from port austin to harbor beach beyond 5nm off shore-
923 am est mon feb 23 2026

.rest of today...north winds 20 to 25 knots with gusts to around
30 knots. a chance of snow showers. freezing spray. waves 8 to 12
feet. waves occasionally around 15 feet. 
.tonight...northwest winds 15 to 20 knots. freezing spray in the 
evening. waves 6 to 9 feet subsiding to 3 to 5 feet early in the 
morning. waves occasionally around 12 feet. 
.tuesday...north winds 5 to 10 knots becoming south 10 to
15 knots in the late morning and early afternoon...then
increasing to 15 to 20 knots with gusts to around 30 knots early
in the afternoon. a chance of snow in the afternoon. waves 1 to
3 feet building to 3 to 5 feet early in the afternoon. 
.tuesday night...south winds 20 to 25 knots with gusts to around
30 knots decreasing to 15 to 20 knots with gusts to around
30 knots in the late evening and overnight. snow. waves 5 to
7 feet. waves occasionally around 10 feet. 
.wednesday...west winds 15 to 20 knots decreasing to 10 to
15 knots late in the afternoon. waves 5 to 7 feet. waves
occasionally around 10 feet. 
.thursday...west winds 5 to 10 knots backing to the east until
early evening...then becoming east 5 to 10 knots by midnight.
waves 2 to 4 feet subsiding to 1 to 3 feet. 
.friday...southwest winds 10 to 15 knots becoming south 20 to
25 knots with gusts to around 30 knots. waves 3 to 5 feet
building to 6 to 9 feet. waves occasionally around 12 feet. 

wave heights are for ice free areas.

$$

fzus63 kmkx 230934
glflm 
expires:202602231615;;114088

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
334 am cst mon feb 23 2026

for waters beyond five nautical miles of shore on lake michigan.

waves are provided as a range of significant wave heights, which
is the average of the highest 1/3 of the wave, along with the
average height of the highest 10% of the waves which will
occasionally be encountered.

.synopsis...

stronger northwesterly winds will continue early this morning, as
strong low pressure deepens to around 28.6 inches off the mid- 
atlantic coast, and strong high pressure moving into ontario 
builds to around 31.1 inches. gales expected to continue across 
the southern two- thirds of the open waters of lake michigan, and 
a gale warning remains in effect into midday today. with the 
brisk conditions, moderate freezing spray is expected, with brief 
periods of heavy freezing spray possible in the central to 
northern third of the lake. 

weakening high pressure around 30.6 inches will continue to push 
eastward through the day today, with winds gradually easing 
overnight. southerly winds look to develop across the lake 
tuesday, as low pressure deepening to around 29.3 inches shifts 
from the dakotas to across lake superior and northern lake 
michigan tuesday afternoon and evening. 

winds will shift more west northwest behind the low and 
associated cold front. winds gusting up to around 30 knots are 
expected during this time, and while potential is lower, still 
cannot rule out a few gale force gusts later tuesday into early 
wednesday morning.


lmz261-362-364-563-231615-
lake michigan from seul choix point to rock island passage 5 nm
offshore to mid lake-
lake michigan south of a line from seul choix point to the
mackinac bridge and north of a line from charlevoix mi to south
fox island 5 nm offshore-
lake michigan from charlevoix to point betsie mi 5 nm offshore to
mid lake-
lake michigan from rock island passage to sturgeon bay wi-
334 am cst mon feb 23 2026

sturgeon bay wi to point betsie mi north...

.today...north winds to 30 kt diminishing to 10 to 20 kt. heavy
freezing spray this morning. waves 6 to 9 ft occasionally to
12 ft subsiding to 4 to 6 ft occasionally to 8 ft. 
.tonight...north winds 10 to 20 kt diminishing to 5 to 10 kt late
in the evening, then becoming northeast after midnight veering to
south 10 to 20 kt late. waves 2 to 4 ft subsiding to 1 to 3 ft. 
.tuesday...south winds to 30 kt increasing to gales to 35 kt.
chance of snow in the morning, then snow in the afternoon. waves
4 to 6 ft occasionally to 8 ft building to 10 to 14 ft
occasionally to 18 ft. 
.tuesday night...west winds to 30 kt becoming northwest. chance
of snow in the evening. waves 8 to 12 ft occasionally to 16 ft
subsiding to 6 to 9 ft occasionally to 12 ft. 
.wednesday...northwest winds to 30 kt. waves 5 to 8 ft
occasionally to 10 ft subsiding to 4 to 6 ft occasionally to
8 ft. 
.wednesday night...northwest winds 10 to 15 kt becoming north.
waves 1 to 3 ft subsiding to 1 to 2 ft. 
.thursday...east winds 10 to 15 kt becoming northeast. waves 1 to
2 ft. 
.friday...southwest winds to 30 kt. waves 6 to 9 ft occasionally
to 12 ft building to 8 to 11 ft occasionally to 14 ft.  

$$

fzus63 kmkx 230934
glflm 
expires:202602231615;;114089

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
334 am cst mon feb 23 2026

for waters beyond five nautical miles of shore on lake michigan.

waves are provided as a range of significant wave heights, which
is the average of the highest 1/3 of the wave, along with the
average height of the highest 10% of the waves which will
occasionally be encountered.

.synopsis...

stronger northwesterly winds will continue early this morning, as
strong low pressure deepens to around 28.6 inches off the mid- 
atlantic coast, and strong high pressure moving into ontario 
builds to around 31.1 inches. gales expected to continue across 
the southern two- thirds of the open waters of lake michigan, and 
a gale warning remains in effect into midday today. with the 
brisk conditions, moderate freezing spray is expected, with brief 
periods of heavy freezing spray possible in the central to 
northern third of the lake. 

weakening high pressure around 30.6 inches will continue to push 
eastward through the day today, with winds gradually easing 
overnight. southerly winds look to develop across the lake 
tuesday, as low pressure deepening to around 29.3 inches shifts 
from the dakotas to across lake superior and northern lake 
michigan tuesday afternoon and evening. 

winds will shift more west northwest behind the low and 
associated cold front. winds gusting up to around 30 knots are 
expected during this time, and while potential is lower, still 
cannot rule out a few gale force gusts later tuesday into early 
wednesday morning.


lmz080-366-565-567-669-671-673-675-777-779-868-870-872-874-876-
878-231615-
lake michigan from michigan city in to st. joseph mi 5 nm
offshore to mid lake-
lake michigan from point betsie to manistee mi 5 nm offshore to
mid lake-
lake michigan from sturgeon bay to two rivers wi 5 nm offshore to
mid lake-
lake michigan from two rivers to sheboygan wi 5 nm offshore to
mid lake-
lake michigan from sheboygan to port washington wi 5 nm offshore
to mid lake-
lake michigan from port washington to north point light wi 5 nm
offshore to mid lake-
lake michigan from north point light to wind point wi 5 nm
offshore to mid lake-
lake michigan from wind point wi to winthrop harbor il 5 nm
offshore to mid lake-
lake michigan from winthrop harbor to wilmette harbor il 5 nm
offshore to mid lake-
lake michigan from wilmette harbor il to michigan city in 5 nm
offshore to mid lake-
lake michigan from pentwater to manistee mi 5 nm offshore to mid
lake-
lake michigan from whitehall to pentwater mi 5 nm offshore to mid
lake-
lake michigan from grand haven to whitehall mi 5 nm offshore to
mid lake-
lake michigan from holland to grand haven mi 5 nm offshore to mid
lake-
lake michigan from south haven to holland mi 5 nm offshore to mid
lake-
lake michigan from st. joseph to south haven mi 5 nm offshore to
mid lake-
334 am cst mon feb 23 2026

sturgeon bay wi to point betsie mi south...

...gale warning in effect until noon cst today...

.today...north gales to 35 kt diminishing to 15 to 25 kt.
freezing spray. scattered snow showers this morning, then
isolated snow showers this afternoon. waves 10 to 14 ft
occasionally to 18 ft subsiding to 8 to 12 ft occasionally to
16 ft. 
.tonight...north winds 15 to 25 kt becoming northwest 10 to 15 kt
late in the evening, then becoming west after midnight becoming
southwest 10 to 20 kt late. waves 6 to 9 ft occasionally to 12 ft
subsiding to 2 to 4 ft. 
.tuesday...south winds to 30 kt becoming southwest gales to
35 kt. chance of snow in the afternoon. waves 4 to 7 ft
occasionally to 9 ft building to 10 to 14 ft occasionally to
18 ft. 
.tuesday night...west winds to 30 kt becoming northwest. freezing
spray overnight. waves 8 to 12 ft occasionally to 16 ft. 
.wednesday...northwest winds to 30 kt becoming west 15 to 25 kt.
freezing spray in the morning. waves 8 to 12 ft occasionally to
16 ft subsiding to 6 to 9 ft occasionally to 12 ft. 
.wednesday night...northwest winds 10 to 15 kt veering to
northeast 10 to 20 kt. waves 3 to 5 ft subsiding to 1 to 3 ft. 
.thursday...northeast winds 10 to 20 kt becoming north 10 to
15 kt. waves 1 to 3 ft. 
.friday...southwest winds to 30 kt. waves 6 to 9 ft occasionally
to 12 ft building to 8 to 11 ft occasionally to 14 ft.  

$$

fzus63 kmqt 230901
glfls 
expires:202602232100;;111840

open lake forecast for lake superior
national weather service marquette mi
400 am est mon feb 23 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 30.9 inch high moving over northern ontario today gradually 
weakens troughing over lake superior, extending 30.7 inch ridging 
over the lake through this morning. the high weakens today and 
tonight before arriving at the ontario/quebec border at 30.2 inches 
tuesday morning. a deepening 29.5 inch low then moves across the 
northern plains tonight, eventually deepening to 29.3 inches as it 
moves through the upper great lakes late tuesday through wednesday 
morning. weak ridging then builds back over lake superior at around 
29.8 inches for wednesday night before the next clipper low 
approaches the lake from the northwest friday; expect troughing of 
29.4 inches to develop over lake superior friday evening before a 
30.6 inch high pressure over the canadian prairies brings 30.4 inch 
ridging over the lake by saturday evening.



lsz266-232100-
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-
400 am est mon feb 23 2026

...heavy freezing spray warning in effect through this evening...
...gale watch in effect from tuesday morning through tuesday
evening...

.early this morning...north gales to 35 knots. heavy freezing
spray. isolated snow showers. waves 8 to 11 feet occasionally to
14 feet. 
.today...north winds 20 to 30 knots diminishing to 15 to
25 knots. isolated snow showers in the morning. heavy freezing
spray. waves subsiding to 3 to 5 feet occasionally to 7 feet. 
.tonight...northeast winds 10 to 20 knots veering southeast by
midnight, then becoming south 20 to 30 knots late. a slight
chance of snow after midnight. waves subsiding to calm to 2 feet,
then building to 3 to 6 feet occasionally to 8 feet. 
.tuesday...south gales to 40 knots. heavy freezing spray. snow.
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 becoming northwest
gales to 35 knots after midnight. freezing spray. snow likely in
the evening. a chance of snow showers after midnight. waves
subsiding to 5 to 8 feet occasionally to 10 feet, then building
to 8 to 11 feet occasionally to 14 feet. 
.wednesday...northwest gales to 35 knots diminishing to 20 to
30 knots in the afternoon. a chance of snow showers in the
morning. freezing spray. waves subsiding to 5 to 8 feet
occasionally to 10 feet. 
.wednesday night...northwest winds 15 to 25 knots becoming west
10 to 20 knots after midnight. freezing spray in the evening.
waves subsiding to 1 to 3 feet. 
.thursday...south winds 10 to 20 knots becoming southwest 15 to
25 knots. waves subsiding to calm to 2 feet, then building to
4 to 7 feet occasionally to 9 feet. 
.friday...south winds 20 to 30 knots becoming west gales to
45 knots. heavy freezing spray. waves building to 15 to 20 feet
occasionally to 25 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 230901
glfls 
expires:202602232100;;111836

open lake forecast for lake superior
national weather service marquette mi
400 am est mon feb 23 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 30.9 inch high moving over northern ontario today gradually 
weakens troughing over lake superior, extending 30.7 inch ridging 
over the lake through this morning. the high weakens today and 
tonight before arriving at the ontario/quebec border at 30.2 inches 
tuesday morning. a deepening 29.5 inch low then moves across the 
northern plains tonight, eventually deepening to 29.3 inches as it 
moves through the upper great lakes late tuesday through wednesday 
morning. weak ridging then builds back over lake superior at around 
29.8 inches for wednesday night before the next clipper low 
approaches the lake from the northwest friday; expect troughing of 
29.4 inches to develop over lake superior friday evening before a 
30.6 inch high pressure over the canadian prairies brings 30.4 inch 
ridging over the lake by saturday evening.



lsz162-232100-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am est mon feb 23 2026 /300 am cst mon feb 23 2026/

...heavy freezing spray warning in effect until 7 am est /6 am
cst/ this morning...

.early this morning...north winds 10 to 20 knots. isolated snow
showers. waves 3 to 5 feet occasionally to 7 feet. 
.today...northeast winds 10 to 20 knots diminishing to 5 to
15 knots by late morning, then veering east by mid afternoon.
waves subsiding to 1 to 3 feet. 
.tonight...southeast winds 5 to 15 knots becoming south 10 to
20 knots by midnight, then increasing to 20 to 30 knots late. a
chance of snow. waves subsiding to calm to 2 feet, then building
to 3 to 5 feet occasionally to 7 feet. 
.tuesday...south winds 20 to 30 knots veering west by mid
afternoon. snow in the morning, then a chance of snow in the
afternoon. waves building to 4 to 7 feet occasionally to 9 feet. 
.tuesday night...northwest winds 20 to 30 knots. waves building
to 4 to 8 feet occasionally to 10 feet. 
.wednesday...northwest winds 15 to 25 knots becoming west 5 to
15 knots in the afternoon. waves subsiding to calm to 2 feet. 
.wednesday night...west winds 5 to 15 knots backing southwest
after midnight. waves calm to 2 feet. 
.thursday...southwest winds 5 to 15 knots increasing to 10 to
20 knots. waves building to 2 to 4 feet. 
.friday...southwest winds 20 to 30 knots becoming west gales to
35 knots. heavy freezing spray. waves building to 4 to 8 feet
occasionally to 10 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 230901
glfls 
expires:202602232100;;111841

open lake forecast for lake superior
national weather service marquette mi
400 am est mon feb 23 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 30.9 inch high moving over northern ontario today gradually 
weakens troughing over lake superior, extending 30.7 inch ridging 
over the lake through this morning. the high weakens today and 
tonight before arriving at the ontario/quebec border at 30.2 inches 
tuesday morning. a deepening 29.5 inch low then moves across the 
northern plains tonight, eventually deepening to 29.3 inches as it 
moves through the upper great lakes late tuesday through wednesday 
morning. weak ridging then builds back over lake superior at around 
29.8 inches for wednesday night before the next clipper low 
approaches the lake from the northwest friday; expect troughing of 
29.4 inches to develop over lake superior friday evening before a 
30.6 inch high pressure over the canadian prairies brings 30.4 inch 
ridging over the lake by saturday evening.



lsz267-232100-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
400 am est mon feb 23 2026

...heavy freezing spray warning in effect through this evening...
...gale watch in effect from tuesday morning through tuesday
evening...

.early this morning...north gales to 35 knots. heavy freezing
spray. waves 5 to 9 feet occasionally to 11 feet. 
.today...north winds 20 to 30 knots diminishing to 15 to
25 knots. heavy freezing spray in the morning. waves subsiding to
2 to 4 feet. 
.tonight...northeast winds 10 to 20 knots veering east by
midnight, then veering south late. waves subsiding to calm to
2 feet, then building to 2 to 4 feet. 
.tuesday...southeast gales to 40 knots veering south by mid
afternoon. heavy freezing spray. a chance of snow in the morning.
snow in the afternoon. waves building to 8 to 12 feet
occasionally to 15 feet. 
.tuesday night...south winds 20 to 30 knots veering northwest
after midnight. freezing spray. snow likely in the evening. a
slight chance of snow showers after midnight. waves subsiding to
4 to 7 feet occasionally to 9 feet, then building to 7 to 10 feet
occasionally to 13 feet. 
.wednesday...northwest winds 20 to 30 knots. freezing spray.
waves subsiding to 5 to 8 feet occasionally to 10 feet. 
.wednesday night...northwest winds 15 to 25 knots diminishing to
5 to 15 knots after midnight. freezing spray in the evening.
waves subsiding to 1 to 3 feet. 
.thursday...south winds 5 to 15 knots becoming southwest 15 to
25 knots. waves subsiding to calm to 2 feet, then building to
3 to 6 feet occasionally to 8 feet. 
.friday...south winds 20 to 30 knots becoming west gales to
40 knots. a chance of snow showers. heavy freezing spray. waves
building to 15 to 20 feet occasionally to 25 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 230901
glfls 
expires:202602232100;;111837

open lake forecast for lake superior
national weather service marquette mi
400 am est mon feb 23 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 30.9 inch high moving over northern ontario today gradually 
weakens troughing over lake superior, extending 30.7 inch ridging 
over the lake through this morning. the high weakens today and 
tonight before arriving at the ontario/quebec border at 30.2 inches 
tuesday morning. a deepening 29.5 inch low then moves across the 
northern plains tonight, eventually deepening to 29.3 inches as it 
moves through the upper great lakes late tuesday through wednesday 
morning. weak ridging then builds back over lake superior at around 
29.8 inches for wednesday night before the next clipper low 
approaches the lake from the northwest friday; expect troughing of 
29.4 inches to develop over lake superior friday evening before a 
30.6 inch high pressure over the canadian prairies brings 30.4 inch 
ridging over the lake by saturday evening.



lsz263-232100-
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-
400 am est mon feb 23 2026

...heavy freezing spray warning in effect until 1 pm est this
afternoon...

.early this morning...north winds 20 to 30 knots. heavy freezing
spray. isolated snow showers. waves 5 to 8 feet occasionally to
10 feet. 
.today...north winds 15 to 25 knots becoming northeast 10 to
20 knots by late morning, then diminishing to 5 to 15 knots by
mid afternoon. heavy freezing spray in the morning. isolated snow
showers in the morning. waves subsiding to 1 to 3 feet. 
.tonight...southeast winds 5 to 15 knots becoming south 10 to
20 knots by midnight, then increasing to 20 to 30 knots late. a
slight chance of snow. waves subsiding to calm to 2 feet, then
building to 3 to 6 feet occasionally to 8 feet. 
.tuesday...south winds 20 to 30 knots veering southwest by late
morning, then becoming west to 30 knots with a few gale force
gusts to 35 knots possible by mid afternoon. heavy freezing spray
in the morning. snow. waves building to 4 to 8 feet occasionally
to 10 feet. 
.tuesday night...northwest gales to 35 knots. heavy freezing
spray after midnight. waves building to 7 to 10 feet occasionally
to 13 feet, then subsiding to 5 to 8 feet occasionally to
10 feet. 
.wednesday...northwest winds 20 to 30 knots becoming west 10 to
20 knots in the afternoon. waves subsiding to 1 to 3 feet. 
.wednesday night...northwest winds 5 to 15 knots becoming
southwest less than 10 knots after midnight. waves subsiding to
calm to 2 feet. 
.thursday...southwest winds 5 to 15 knots increasing to 15 to
25 knots. waves building to 3 to 5 feet occasionally to 7 feet. 
.friday...southwest winds 20 to 30 knots becoming west gales to
35 knots. heavy freezing spray. waves building to 8 to 12 feet
occasionally to 15 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 230901
glfls 
expires:202602232100;;111838

open lake forecast for lake superior
national weather service marquette mi
400 am est mon feb 23 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 30.9 inch high moving over northern ontario today gradually 
weakens troughing over lake superior, extending 30.7 inch ridging 
over the lake through this morning. the high weakens today and 
tonight before arriving at the ontario/quebec border at 30.2 inches 
tuesday morning. a deepening 29.5 inch low then moves across the 
northern plains tonight, eventually deepening to 29.3 inches as it 
moves through the upper great lakes late tuesday through wednesday 
morning. weak ridging then builds back over lake superior at around 
29.8 inches for wednesday night before the next clipper low 
approaches the lake from the northwest friday; expect troughing of 
29.4 inches to develop over lake superior friday evening before a 
30.6 inch high pressure over the canadian prairies brings 30.4 inch 
ridging over the lake by saturday evening.



lsz264-232100-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
400 am est mon feb 23 2026

...heavy freezing spray warning in effect until 1 pm est this
afternoon...
...gale watch in effect from tuesday morning through tuesday
afternoon...

.early this morning...north winds 20 to 30 knots. heavy freezing
spray. isolated snow showers. waves 6 to 9 feet occasionally to
11 feet. 
.today...north winds 15 to 25 knots diminishing to 5 to 15 knots
by mid afternoon. heavy freezing spray in the morning. isolated
snow showers in the morning. waves subsiding to 2 to 4 feet. 
.tonight...east winds 5 to 15 knots becoming south 10 to 20 knots
by midnight, then increasing to 20 to 30 knots late. a chance of
snow after midnight. waves subsiding to calm to 2 feet, then
building to 3 to 6 feet occasionally to 8 feet. 
.tuesday...south gales to 40 knots becoming southwest 20 to
30 knots by mid afternoon. heavy freezing spray. snow. waves
building to 10 to 14 feet occasionally to 18 feet, then subsiding
to 6 to 9 feet occasionally to 11 feet. 
.tuesday night...northwest winds 20 to 30 knots. a slight chance
of snow in the evening. heavy freezing spray. waves subsiding to
5 to 8 feet occasionally to 10 feet, then building to 6 to 9 feet
occasionally to 11 feet. 
.wednesday...northwest winds 20 to 30 knots diminishing to 15 to
25 knots in the afternoon. heavy freezing spray in the morning.
waves subsiding to 2 to 4 feet. 
.wednesday night...northwest winds 10 to 20 knots becoming west
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.thursday...southwest winds 5 to 15 knots increasing to 15 to
25 knots. waves building to 3 to 6 feet occasionally to 8 feet. 
.friday...southwest winds 20 to 30 knots becoming northwest gales
to 40 knots. heavy freezing spray. waves building to 10 to
14 feet occasionally to 18 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 230901
glfls 
expires:202602232100;;111839

open lake forecast for lake superior
national weather service marquette mi
400 am est mon feb 23 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 30.9 inch high moving over northern ontario today gradually 
weakens troughing over lake superior, extending 30.7 inch ridging 
over the lake through this morning. the high weakens today and 
tonight before arriving at the ontario/quebec border at 30.2 inches 
tuesday morning. a deepening 29.5 inch low then moves across the 
northern plains tonight, eventually deepening to 29.3 inches as it 
moves through the upper great lakes late tuesday through wednesday 
morning. weak ridging then builds back over lake superior at around 
29.8 inches for wednesday night before the next clipper low 
approaches the lake from the northwest friday; expect troughing of 
29.4 inches to develop over lake superior friday evening before a 
30.6 inch high pressure over the canadian prairies brings 30.4 inch 
ridging over the lake by saturday evening.



lsz265-232100-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
400 am est mon feb 23 2026

...heavy freezing spray warning in effect until 1 pm est this
afternoon...
...gale watch in effect from tuesday morning through tuesday
afternoon...

.early this morning...north gales to 35 knots. heavy freezing
spray. isolated snow showers. waves 8 to 11 feet occasionally to
14 feet. 
.today...north winds 20 to 30 knots diminishing to 10 to
20 knots. heavy freezing spray in the morning. isolated snow
showers in the morning. waves subsiding to 3 to 5 feet
occasionally to 7 feet. 
.tonight...north winds 5 to 15 knots becoming south 10 to
20 knots by midnight, then increasing to 20 to 30 knots late. a
slight chance of snow after midnight. waves subsiding to calm to
2 feet, then building to 3 to 6 feet occasionally to 8 feet. 
.tuesday...south gales to 35 knots becoming southwest 15 to
25 knots by mid afternoon. heavy freezing spray. snow. 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 20 to 30 knots becoming northwest
gales to 35 knots after midnight. a chance of snow. heavy
freezing spray after midnight. waves building to 5 to 8 feet
occasionally to 10 feet. 
.wednesday...northwest gales to 35 knots diminishing to 15 to
25 knots in the afternoon. heavy freezing spray. waves subsiding
to 2 to 4 feet. 
.wednesday night...west winds 10 to 20 knots. waves subsiding to
calm to 2 feet. 
.thursday...south winds 10 to 20 knots becoming southwest 15 to
25 knots. waves building to 1 to 3 feet. 
.friday...southwest winds 20 to 30 knots becoming west gales to
40 knots. heavy freezing spray. waves building to 9 to 12 feet
occasionally to 15 feet. 

note, wave height forecasts are for ice free areas.

$$