fzus63 kdtx 180845
glflh 
expires:202601181645;;088618

open lake forecast for lake huron
national weather service detroit/pontiac mi
345 am est sun jan 18 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...several successive disturbances of varying magnitude
work through the central great lakes this weekend and into next
week. this results in elevated winds, waves, freezing spray, and
additional snowfall, especially once arctic air surges by monday.
gale watches are in effect for most waters monday.


lhz361-181645-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
345 am est sun jan 18 2026

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


$$

fzus63 kdtx 180845
glflh 
expires:202601181645;;088619

open lake forecast for lake huron
national weather service detroit/pontiac mi
345 am est sun jan 18 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...several successive disturbances of varying magnitude
work through the central great lakes this weekend and into next
week. this results in elevated winds, waves, freezing spray, and
additional snowfall, especially once arctic air surges by monday.
gale watches are in effect for most waters monday.


lhz362-363-462-181645-
lake huron from presque isle light to sturgeon point mi beyond
5nm off shore-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
lake huron from port austin to harbor beach beyond 5nm off shore-
345 am est sun jan 18 2026

...gale watch in effect from monday morning through monday
evening...

.today...southwest winds 10 to 15 knots increasing to 15 to
20 knots late in the afternoon. a chance of snow. waves 3 to
5 feet. 
.tonight...southwest winds 15 to 20 knots increasing to 20 to
25 knots late in the evening...then decreasing to 15 to 20 knots
after midnight. a chance of snow in the evening...then snow
likely after midnight. waves 5 to 7 feet. waves occasionally
around 10 feet. 
.monday...southwest winds 20 to 25 knots becoming west to
30 knots with gusts to 35 knot gales in the late morning and
afternoon. a chance of snow. waves 8 to 12 feet building to 10 to
14 feet early in the afternoon. waves occasionally around
18 feet. 
.monday night...west winds to 30 knots with gusts to 35 knot
gales decreasing to 20 to 25 knots with gusts to around 30 knots
in the late evening and overnight. waves 8 to 12 feet. waves
occasionally around 15 feet. 
.tuesday...west winds 20 to 25 knots becoming southwest 15 to
20 knots late in the evening. waves 6 to 9 feet. waves
occasionally around 12 feet. 
.wednesday...south winds 15 to 20 knots becoming southwest 20 to
25 knots with gusts to around 30 knots . a chance of snow. waves
6 to 9 feet. waves occasionally around 12 feet. 
.thursday...west winds 20 to 25 knots decreasing to 15 to
20 knots by midnight. waves 6 to 9 feet. waves occasionally
around 12 feet. 


$$

fzus63 kmkx 180859
glflm 
expires:202601181615;;089324

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
259 am cst sun jan 18 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...

low pressure around 29.8 inches will move from northwest 
minnesota this morning to the eastern upper peninsula of michigan
today. west to southwest winds are expected today across lake
michigan. 

the low will then strengthen to around 29.5 inches as is shifts 
into eastern ontario tonight, and into quebec on monday. an 
arctic cold front will move across the lake later this evening, 
with northwest gales and heavy freezing spray expected behind the 
front later tonight through monday afternoon. 

a gale warning is in effect for all of lake michigan later 
tonight through monday afternoon. the strong winds will combine 
with building waves and cold temperatures to bring heavy freezing 
spray later tonight through tuesday morning. a heavy freezing 
spray warning is in effect during this period across all of lake 
michigan. 

high pressure around 30.5 inches will shift from the northern
plains into the lower mississippi river valley tuesday, with winds
across lake michigan shifting west to southwest. 


lmz261-362-364-366-563-565-567-868-181615-
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 point betsie to manistee mi 5 nm offshore to
mid lake-
lake michigan from rock island passage to sturgeon bay wi-
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 pentwater to manistee mi 5 nm offshore to mid
lake-
259 am cst sun jan 18 2026

sheboygan wi to pentwater mi north...

...gale warning in effect from late tonight through monday
afternoon...
...heavy freezing spray warning in effect from late tonight
through tuesday morning...

.today...west winds 10 to 20 kt becoming southwest. chance of
snow. waves 3 to 5 ft. 
.tonight...west winds 10 to 20 kt increasing to 30 kt late in the
evening, then increasing to gales to 35 kt after midnight
becoming northwest gales to 40 kt late. snow. heavy freezing
spray overnight. waves 4 to 6 ft occasionally to 8 ft building to
8 to 12 ft occasionally to 16 ft. 
.monday...northwest gales to 40 kt diminishing to 30 kt. heavy
freezing spray. chance of snow. waves 12 to 16 ft occasionally to
21 ft. 
.monday night...west winds to 30 kt. heavy freezing spray. waves
8 to 11 ft occasionally to 14 ft subsiding to 6 to 9 ft
occasionally to 12 ft. 
.tuesday...west winds to 30 kt. heavy freezing spray in the
morning. waves 5 to 8 ft occasionally to 10 ft subsiding to 4 to
6 ft occasionally to 8 ft. 
.tuesday night...southwest winds 10 to 20 kt. waves 4 to 6 ft
occasionally to 8 ft building to 4 to 7 ft occasionally to 9 ft. 
.wednesday...west winds 15 to 25 kt increasing to 30 kt. chance
of snow. waves 4 to 7 ft occasionally to 9 ft building to 5 to
8 ft occasionally to 10 ft. 
.thursday...west winds to 30 kt. heavy freezing spray. waves 5 to
8 ft occasionally to 10 ft subsiding to 4 to 7 ft occasionally to
9 ft.  

$$

fzus63 kmkx 180859
glflm 
expires:202601181615;;089325

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
259 am cst sun jan 18 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...

low pressure around 29.8 inches will move from northwest 
minnesota this morning to the eastern upper peninsula of michigan
today. west to southwest winds are expected today across lake
michigan. 

the low will then strengthen to around 29.5 inches as is shifts 
into eastern ontario tonight, and into quebec on monday. an 
arctic cold front will move across the lake later this evening, 
with northwest gales and heavy freezing spray expected behind the 
front later tonight through monday afternoon. 

a gale warning is in effect for all of lake michigan later 
tonight through monday afternoon. the strong winds will combine 
with building waves and cold temperatures to bring heavy freezing 
spray later tonight through tuesday morning. a heavy freezing 
spray warning is in effect during this period across all of lake 
michigan. 

high pressure around 30.5 inches will shift from the northern
plains into the lower mississippi river valley tuesday, with winds
across lake michigan shifting west to southwest. 


lmz080-669-671-673-675-777-779-870-872-874-876-878-181615-
lake michigan from michigan city in to st. joseph mi 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 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-
259 am cst sun jan 18 2026

sheboygan wi to pentwater mi south...

...gale warning in effect from late tonight through monday
afternoon...
...heavy freezing spray warning in effect from late tonight
through tuesday morning...

.today...west winds 10 to 20 kt becoming southwest 15 to 25 kt.
freezing spray. slight chance of snow this morning, then chance
of snow this afternoon. waves 4 to 7 ft occasionally to 9 ft. 
.tonight...southwest winds 15 to 25 kt becoming west to 30 kt
late in the evening, then increasing to gales to 40 kt after
midnight becoming northwest late. freezing spray in the evening,
then heavy freezing spray overnight. snow in the evening, then
chance of snow overnight. waves 4 to 7 ft occasionally to 9 ft
building to 12 to 16 ft occasionally to 21 ft. 
.monday...northwest gales to 40 kt becoming west gales to 35 kt.
heavy freezing spray. chance of snow. waves 14 to 18 ft
occasionally to 23 ft. 
.monday night...west winds to 30 kt. heavy freezing spray. chance
of snow. waves 10 to 14 ft occasionally to 18 ft subsiding to
8 to 11 ft occasionally to 14 ft. 
.tuesday...west winds to 30 kt becoming southwest 15 to 25 kt.
heavy freezing spray in the morning, then freezing spray in the
afternoon. waves 6 to 9 ft occasionally to 12 ft. 
.tuesday night...southwest winds 15 to 25 kt increasing to 30 kt.
chance of snow. waves 4 to 7 ft occasionally to 9 ft building to
5 to 8 ft occasionally to 10 ft. 
.wednesday...west winds to 30 kt. chance of snow. waves 6 to 9 ft
occasionally to 12 ft building to 7 to 10 ft occasionally to
13 ft. 
.thursday...west winds to 30 kt diminishing to 15 to 25 kt.
freezing spray. chance of snow. waves 8 to 11 ft occasionally to
14 ft subsiding to 6 to 9 ft occasionally to 12 ft.  

$$

fzus63 kmqt 180901
glfls 
expires:202601182100;;089425

open lake forecast for lake superior
national weather service marquette mi
400 am est sun jan 18 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 clipper low of around 29.8 inches moves over lake superior today, 
deepening to 29.6 inches as it settles over the far east tonight. 
the low then moves to quebec on monday while a high pressure of 30.6 
inches drops south over the plains. this builds weak ridging of 30.0 
inches over much of lake superior on monday which strengthens to 
30.1 inches by tuesday morning. a low of at least 29.8 inches then 
moves over lake superior on wednesday. as the low continues east on 
thursday, a weak remnant trough of 30.0 inches extends over the 
lake. after that, a 30.8 inch high builds from the canadian prairies 
into the northern plains thursday night through friday.



lsz162-182100-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am est sun jan 18 2026 /300 am cst sun jan 18 2026/

...heavy freezing spray warning in effect from this evening
through monday afternoon...

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

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 180901
glfls 
expires:202601182100;;089426

open lake forecast for lake superior
national weather service marquette mi
400 am est sun jan 18 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 clipper low of around 29.8 inches moves over lake superior today, 
deepening to 29.6 inches as it settles over the far east tonight. 
the low then moves to quebec on monday while a high pressure of 30.6 
inches drops south over the plains. this builds weak ridging of 30.0 
inches over much of lake superior on monday which strengthens to 
30.1 inches by tuesday morning. a low of at least 29.8 inches then 
moves over lake superior on wednesday. as the low continues east on 
thursday, a weak remnant trough of 30.0 inches extends over the 
lake. after that, a 30.8 inch high builds from the canadian prairies 
into the northern plains thursday night through friday.



lsz263-182100-
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 sun jan 18 2026

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

.early this morning...north winds 10 to 20 knots. a chance of
snow showers. waves 1 to 3 feet building to 2 to 4 feet. 
.today...southwest winds 10 to 20 knots veering west by mid
afternoon. a chance of snow showers in the morning, then snow
showers in the afternoon. waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 2 to 4 feet. 
.tonight...north winds 20 to 30 knots increasing to gales to
35 knots by midnight. heavy freezing spray. snow showers. waves
building to 10 to 14 feet occasionally to 18 feet, then subsiding
to 9 to 12 feet occasionally to 15 feet. 
.monday...north winds 20 to 30 knots becoming northwest 15 to
25 knots. heavy freezing spray. a chance of snow showers. waves
subsiding to 4 to 7 feet occasionally to 9 feet. 
.monday night...northwest winds 15 to 25 knots. heavy freezing
spray. a slight chance of snow showers. waves building to 5 to
8 feet occasionally to 10 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet. 
.tuesday...west winds 15 to 25 knots. heavy freezing spray in the
afternoon. waves 3 to 6 feet occasionally to 8 feet. 
.tuesday night...west winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. waves subsiding to 2 to 4 feet. 
.wednesday...northwest winds 15 to 25 knots. a chance of snow
showers. heavy freezing spray. waves building to 3 to 6 feet
occasionally to 8 feet. 
.thursday...northwest winds 15 to 25 knots diminishing to 10 to
20 knots. waves subsiding to 2 to 4 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 180901
glfls 
expires:202601182100;;089427

open lake forecast for lake superior
national weather service marquette mi
400 am est sun jan 18 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 clipper low of around 29.8 inches moves over lake superior today, 
deepening to 29.6 inches as it settles over the far east tonight. 
the low then moves to quebec on monday while a high pressure of 30.6 
inches drops south over the plains. this builds weak ridging of 30.0 
inches over much of lake superior on monday which strengthens to 
30.1 inches by tuesday morning. a low of at least 29.8 inches then 
moves over lake superior on wednesday. as the low continues east on 
thursday, a weak remnant trough of 30.0 inches extends over the 
lake. after that, a 30.8 inch high builds from the canadian prairies 
into the northern plains thursday night through friday.



lsz264-182100-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
400 am est sun jan 18 2026

...heavy freezing spray warning in effect from this evening
through monday evening...
...gale warning in effect from this evening through monday
afternoon...

.early this morning...north winds 5 to 15 knots. a chance of snow
showers. waves 1 to 3 feet. 
.today...north winds 5 to 15 knots becoming southwest 10 to
20 knots by late morning, then veering west by mid afternoon. a
chance of snow showers in the morning, then snow showers in the
afternoon. waves subsiding to calm to 2 feet, then building to
3 to 5 feet occasionally to 7 feet. 
.tonight...north winds 20 to 30 knots increasing to gales to
35 knots by midnight. heavy freezing spray. snow showers. waves
building to 10 to 14 feet occasionally to 18 feet. 
.monday...north gales to 35 knots becoming northwest 20 to
30 knots by late morning, then diminishing to 15 to 25 knots by
mid afternoon. heavy freezing spray. a chance of snow showers.
waves subsiding to 4 to 7 feet occasionally to 9 feet. 
.monday night...northwest winds 15 to 25 knots. heavy freezing
spray. a chance of snow showers. waves subsiding to 3 to 6 feet
occasionally to 8 feet. 
.tuesday...west winds 15 to 25 knots. heavy freezing spray. waves
3 to 6 feet occasionally to 8 feet. 
.tuesday night...west winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. freezing spray in the evening. waves
subsiding to 2 to 4 feet. 
.wednesday...northwest winds 15 to 25 knots. heavy freezing
spray. waves building to 4 to 7 feet occasionally to 9 feet, then
subsiding to 3 to 6 feet occasionally to 8 feet. 
.thursday...northwest winds 15 to 25 knots. waves subsiding to
2 to 4 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 180901
glfls 
expires:202601182100;;089428

open lake forecast for lake superior
national weather service marquette mi
400 am est sun jan 18 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 clipper low of around 29.8 inches moves over lake superior today, 
deepening to 29.6 inches as it settles over the far east tonight. 
the low then moves to quebec on monday while a high pressure of 30.6 
inches drops south over the plains. this builds weak ridging of 30.0 
inches over much of lake superior on monday which strengthens to 
30.1 inches by tuesday morning. a low of at least 29.8 inches then 
moves over lake superior on wednesday. as the low continues east on 
thursday, a weak remnant trough of 30.0 inches extends over the 
lake. after that, a 30.8 inch high builds from the canadian prairies 
into the northern plains thursday night through friday.



lsz265-182100-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
400 am est sun jan 18 2026

...gale warning in effect from late tonight through monday
afternoon...
...heavy freezing spray warning in effect from late tonight
through monday evening...

.early this morning...west winds 10 to 20 knots. a chance of snow
showers. waves 2 to 4 feet. 
.today...west winds 10 to 20 knots. a chance of snow showers.
waves subsiding to calm to 2 feet, then building to 1 to 3 feet. 
.tonight...west winds 15 to 25 knots becoming north gales to
45 knots by midnight. snow showers. heavy freezing spray after
midnight. waves building to 12 to 17 feet occasionally to
21 feet. 
.monday...north gales to 40 knots becoming northwest gales to
35 knots. heavy freezing spray. snow showers likely. waves
subsiding to 6 to 9 feet occasionally to 11 feet. 
.monday night...northwest gales to 35 knots backing west after
midnight. heavy freezing spray. a chance of snow showers. waves
subsiding to 3 to 6 feet occasionally to 8 feet. 
.tuesday...west gales to 35 knots diminishing to 20 to 30 knots
in the afternoon. heavy freezing spray. a chance of snow showers.
waves subsiding to 3 to 5 feet occasionally to 7 feet. 
.tuesday night...southwest winds 20 to 30 knots diminishing to
15 to 25 knots after midnight. waves subsiding to 1 to 3 feet. 
.wednesday...west winds 15 to 25 knots becoming northwest gales
to 35 knots. a chance of snow showers. heavy freezing spray.
waves building to 4 to 7 feet occasionally to 9 feet. 
.thursday...west winds 20 to 30 knots. heavy freezing spray. a
chance of snow showers. waves subsiding to 2 to 4 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 180901
glfls 
expires:202601182100;;089429

open lake forecast for lake superior
national weather service marquette mi
400 am est sun jan 18 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 clipper low of around 29.8 inches moves over lake superior today, 
deepening to 29.6 inches as it settles over the far east tonight. 
the low then moves to quebec on monday while a high pressure of 30.6 
inches drops south over the plains. this builds weak ridging of 30.0 
inches over much of lake superior on monday which strengthens to 
30.1 inches by tuesday morning. a low of at least 29.8 inches then 
moves over lake superior on wednesday. as the low continues east on 
thursday, a weak remnant trough of 30.0 inches extends over the 
lake. after that, a 30.8 inch high builds from the canadian prairies 
into the northern plains thursday night through friday.



lsz266-182100-
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 sun jan 18 2026

...gale warning in effect from late tonight through monday
afternoon...
...heavy freezing spray warning in effect from late tonight
through monday evening...

.early this morning...north winds 10 to 20 knots. a chance of
snow showers. waves 2 to 4 feet. 
.today...east winds 5 to 15 knots becoming southwest 10 to
20 knots. snow showers. waves subsiding to 1 to 3 feet, then
building to 3 to 5 feet occasionally to 7 feet. 
.tonight...west winds 15 to 25 knots becoming north gales to
40 knots by midnight. heavy freezing spray. snow showers. waves
building to 12 to 17 feet occasionally to 21 feet. 
.monday...north gales to 40 knots becoming northwest gales to
35 knots by mid afternoon. heavy freezing spray. snow showers.
waves subsiding to 8 to 11 feet occasionally to 14 feet. 
.monday night...northwest gales to 35 knots. heavy freezing
spray. snow showers likely in the evening. a chance of snow
showers after midnight. waves subsiding to 6 to 9 feet
occasionally to 11 feet. 
.tuesday...west winds 20 to 30 knots. heavy freezing spray. snow
showers likely in the morning. a chance of snow showers in the
afternoon. waves 6 to 9 feet occasionally to 11 feet. 
.tuesday night...southwest winds 20 to 30 knots diminishing to
15 to 25 knots after midnight. freezing spray. a chance of snow
showers. waves subsiding to 3 to 6 feet occasionally to 8 feet. 
.wednesday...west winds 15 to 25 knots becoming northwest 20 to
30 knots. heavy freezing spray. a chance of snow showers. waves
subsiding to 2 to 4 feet, then building to 6 to 9 feet
occasionally to 11 feet. 
.thursday...northwest winds 20 to 30 knots. heavy freezing spray.
a chance of snow showers. waves subsiding to 3 to 6 feet
occasionally to 8 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 180901
glfls 
expires:202601182100;;089430

open lake forecast for lake superior
national weather service marquette mi
400 am est sun jan 18 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 clipper low of around 29.8 inches moves over lake superior today, 
deepening to 29.6 inches as it settles over the far east tonight. 
the low then moves to quebec on monday while a high pressure of 30.6 
inches drops south over the plains. this builds weak ridging of 30.0 
inches over much of lake superior on monday which strengthens to 
30.1 inches by tuesday morning. a low of at least 29.8 inches then 
moves over lake superior on wednesday. as the low continues east on 
thursday, a weak remnant trough of 30.0 inches extends over the 
lake. after that, a 30.8 inch high builds from the canadian prairies 
into the northern plains thursday night through friday.



lsz267-182100-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
400 am est sun jan 18 2026

...heavy freezing spray warning in effect from monday morning
through monday evening...

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

note, wave height forecasts are for ice free areas.

$$