fzus63 kdtx 300821
glflh 
expires:202512301630;;483303

open lake forecast for lake huron
national weather service detroit/pontiac mi
321 am est tue dec 30 2025

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...low pressure, 28.90 inches, continues moving away from
the great lakes to the atlantic coast today. this allows gales,
snow squalls, and freezing spray to diminish across the central
great lakes. the next weaker clipper low pressure system arrives
tonight in a persistent northwest flow pattern through mid week.


lhz361-301630-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
321 am est tue dec 30 2025

...gale warning in effect until 11 am est this morning...
...heavy freezing spray warning in effect until 11 am est this
morning...

.today...northwest winds 20 to 25 knots. gusts to 35 knot gales in
the morning. freezing spray. a chance of snow in the afternoon. 
waves 8 to 12 feet. waves occasionally around 15 feet. 
.tonight...northwest winds 15 to 20 knots. snow likely. waves
5 to 7 feet. waves occasionally around 10 feet. 
.wednesday...northwest winds 10 to 15 knots increasing to 15 to
20 knots with gusts to around 30 knots in the late morning and
afternoon. a chance of snow in the morning...then snow likely in
the afternoon. waves 3 to 5 feet building to 5 to 7 feet early in
the afternoon. waves occasionally around 10 feet. 
.wednesday night...northwest winds 20 to 25 knots. gusts to
30 knots early in the evening. freezing spray. waves 6 to 9 feet.
waves occasionally around 12 feet. 
.thursday...west winds 20 to 25 knots. gusts to 30 knots.
freezing spray. a chance of snow late in the afternoon. waves
6 to 9 feet. waves occasionally around 12 feet. 
.friday...west winds 20 to 25 knots decreasing to 15 to 20 knots.
freezing spray early in the morning. waves 5 to 7 feet. waves
occasionally around 10 feet. 
.saturday...northwest winds 10 to 15 knots decreasing to 5 to
10 knots in the late morning and early afternoon...then becoming
west 10 to 15 knots . waves 2 to 4 feet subsiding to 1 to 3 feet.


$$

fzus63 kdtx 300821
glflh 
expires:202512301630;;483304

open lake forecast for lake huron
national weather service detroit/pontiac mi
321 am est tue dec 30 2025

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...low pressure, 28.90 inches, continues moving away from
the great lakes to the atlantic coast today. this allows gales,
snow squalls, and freezing spray to diminish across the central
great lakes. the next weaker clipper low pressure system arrives
tonight in a persistent northwest flow pattern through mid week.


lhz362-363-301630-
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-
321 am est tue dec 30 2025

...gale warning in effect until 11 am est this morning...
...heavy freezing spray warning in effect until 11 am est this
morning...

.today...northwest at 35 knot gales with gusts to 40 knot gales
becoming west 20 to 25 knots with gusts to around 30 knots.
freezing spray. a chance of snow in the afternoon. waves 14 to
18 feet subsiding to 10 to 14 feet in the afternoon. waves
occasionally around 23 feet. 
.tonight...west winds 20 to 25 knots with gusts to around
30 knots decreasing to 15 to 20 knots after midnight. snow likely
in the evening...then a chance of snow after midnight. waves 8 to
12 feet. waves occasionally around 15 feet. 
.wednesday...west winds 15 to 20 knots becoming northwest 20 to
25 knots with gusts to around 30 knots early in the afternoon. a
chance of snow in the morning...then snow likely in the
afternoon. freezing spray in the afternoon. waves 6 to 9 feet.
waves occasionally around 12 feet. 
.wednesday night...northwest winds to 30 knots decreasing to
20 to 25 knots in the late evening and overnight. a chance of
snow in the evening. freezing spray. waves 8 to 12 feet. waves
occasionally around 15 feet. 
.thursday...west winds 20 to 25 knots. gusts to 30 knots in the
morning. freezing spray. waves 8 to 12 feet. waves occasionally
around 15 feet. 
.friday...west winds 20 to 25 knots decreasing to 15 to 20 knots.
freezing spray early in the morning. waves 6 to 9 feet. waves
occasionally around 12 feet. 
.saturday...west winds 15 to 20 knots decreasing to 10 to
15 knots. waves 3 to 5 feet. 


$$

fzus63 kdtx 300821
glflh 
expires:202512301630;;483305

open lake forecast for lake huron
national weather service detroit/pontiac mi
321 am est tue dec 30 2025

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...low pressure, 28.90 inches, continues moving away from
the great lakes to the atlantic coast today. this allows gales,
snow squalls, and freezing spray to diminish across the central
great lakes. the next weaker clipper low pressure system arrives
tonight in a persistent northwest flow pattern through mid week.


lhz462>464-301630-
lake huron from port austin to harbor beach beyond 5nm off shore-
lake huron from harbor beach to port sanilac beyond 5nm off shore-
lake huron from port sanilac to port huron beyond 5nm off shore-
321 am est tue dec 30 2025

...gale warning in effect until 11 am est this morning...

.today...northwest winds to 30 knots becoming west 20 to 25 knots
in the afternoon. gusts to 35 knot gales in the morning. freezing
spray in the morning. a chance of snow in the afternoon. waves 14
to 18 feet subsiding to 10 to 14 feet in the afternoon. waves 
occasionally around 23 feet. 
.tonight...west winds 20 to 25 knots decreasing to 15 to 20 knots
after midnight. snow likely. waves 6 to 9 feet. waves
occasionally around 12 feet. 
.wednesday...west winds 15 to 20 knots increasing to 20 to
25 knots early in the afternoon. snow likely in the morning...
then snow in the afternoon. waves 5 to 7 feet. waves occasionally
around 10 feet. 
.wednesday night...northwest winds 20 to 25 knots increasing to
30 knots by midnight...then decreasing to 20 to 25 knots after
midnight. a chance of snow. freezing spray. waves 8 to 12 feet.
waves occasionally around 15 feet. 
.thursday...west winds 20 to 25 knots decreasing to 15 to
20 knots late in the afternoon. freezing spray. a chance of snow
late in the afternoon. waves 6 to 9 feet. waves occasionally
around 12 feet. 
.friday...west winds 15 to 20 knots. waves 4 to 6 feet. waves
occasionally around 8 feet. 
.saturday...west winds 10 to 15 knots. waves 2 to 4 feet. 


$$

fzus63 kmkx 300921 aaa
glflm 
expires:202512301615;;486936

open lake forecast for lake michigan...updated
national weather service milwaukee/sullivan wi
321 am cst tue dec 30 2025

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...

winds have fallen below gales, but gusty northwesterly winds and
moderate freezing spray concerns continue this morning as lake
michigan sits between strong low pressure around 28.9 inches
meandering over quebec and a high pressure around 30.6 inches 
moving south across the plains. will then see the gusty winds 
shift more westerly this afternoon as an area of weak low pressure
around 29.9 inches and cold front slides down across the region. 
northwesterly winds return overnight behind the frontal passage 
with a few gale force gusts possible across the far northern 
portions of the lake. will see another cold front move down across
the lake wednesday with northwesterly winds prevailing through 
the end of the week. behind the front, colder arctic air will 
settle over the region as high pressure around 30.3 inches builds 
down across the upper great lakes region wednesday night into 
thursday. could see additional freezing spray concern through the 
end of the week given breezy winds and the colder airmass.


lmz080-669-671-673-675-777-779-870-872-874-876-878-301615-
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-
321 am cst tue dec 30 2025

sheboygan wi to pentwater mi south...

.today...northwest winds 15 to 25 kt becoming west. freezing
spray this morning. slight chance of snow this morning, then
chance of snow this afternoon. waves 8 to 11 ft occasionally to
14 ft subsiding to 7 to 10 ft occasionally to 13 ft. 
.tonight...west winds 15 to 25 kt becoming northwest. snow likely
in the evening, then slight chance of snow overnight. waves 6 to
9 ft occasionally to 12 ft. 
.wednesday...northwest winds to 30 kt. chance of snow in the
morning, then snow likely in the afternoon. freezing spray in the
afternoon. waves 6 to 9 ft occasionally to 12 ft building to 8 to
11 ft occasionally to 14 ft. 
.wednesday night...northwest winds to 30 kt. chance of snow in
the evening. freezing spray. waves 8 to 11 ft occasionally to
14 ft. 
.thursday...northwest winds 15 to 25 kt becoming west. freezing
spray in the morning. waves 5 to 8 ft occasionally to 10 ft
subsiding to 4 to 7 ft occasionally to 9 ft. 
.thursday night...west winds 15 to 25 kt. waves 4 to 6 ft
occasionally to 8 ft. 
.friday...northwest winds 10 to 20 kt. waves 4 to 6 ft
occasionally to 8 ft. 
.saturday...northwest winds 10 to 15 kt. waves 2 to 4 ft.  

$$

fzus63 kmkx 300921 aaa
glflm 
expires:202512301615;;486935

open lake forecast for lake michigan...updated
national weather service milwaukee/sullivan wi
321 am cst tue dec 30 2025

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...

winds have fallen below gales, but gusty northwesterly winds and
moderate freezing spray concerns continue this morning as lake
michigan sits between strong low pressure around 28.9 inches
meandering over quebec and a high pressure around 30.6 inches 
moving south across the plains. will then see the gusty winds 
shift more westerly this afternoon as an area of weak low pressure
around 29.9 inches and cold front slides down across the region. 
northwesterly winds return overnight behind the frontal passage 
with a few gale force gusts possible across the far northern 
portions of the lake. will see another cold front move down across
the lake wednesday with northwesterly winds prevailing through 
the end of the week. behind the front, colder arctic air will 
settle over the region as high pressure around 30.3 inches builds 
down across the upper great lakes region wednesday night into 
thursday. could see additional freezing spray concern through the 
end of the week given breezy winds and the colder airmass.


lmz261-362-364-366-563-565-567-868-301615-
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-
321 am cst tue dec 30 2025

sheboygan wi to pentwater mi north...

.today...northwest winds to 30 kt becoming west 15 to 25 kt.
freezing spray this morning. slight chance of snow this morning,
then snow likely this afternoon. waves 7 to 10 ft occasionally to
13 ft subsiding to 4 to 6 ft occasionally to 8 ft. 
.tonight...northwest winds 15 to 25 kt. chance of snow in the
evening, then slight chance of snow overnight. waves 4 to 7 ft
occasionally to 9 ft. 
.wednesday...northwest winds 15 to 25 kt increasing to 30 kt.
chance of snow. freezing spray in the afternoon. waves 6 to 9 ft
occasionally to 12 ft. 
.wednesday night...northwest gales to 35 kt diminishing to 30 kt.
freezing spray. waves 7 to 10 ft occasionally to 13 ft. 
.thursday...northwest winds to 30 kt becoming west. freezing
spray in the morning. waves 4 to 7 ft occasionally to 9 ft
subsiding to 4 to 6 ft occasionally to 8 ft. 
.thursday night...west winds to 30 kt. waves 4 to 6 ft
occasionally to 8 ft. 
.friday...northwest winds 15 to 25 kt. waves 3 to 5 ft. 
.saturday...northwest winds 10 to 20 kt. waves 1 to 3 ft.  

$$

fzus63 kmqt 300901
glfls 
expires:202512302100;;484566

open lake forecast for lake superior
national weather service marquette mi
400 am est tue dec 30 2025

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 29.0 inch low moves into eastern quebec this morning as 30.1 inch 
ridging overspreads the upper midwest. the low will continue to lift 
north and then retrograde westward to the hudson bay tonight into 
wednesday. as the aforementioned ridge slides southeast it will 
extend a 30.1 inch ridge over lake superior today, before a 29.9 
inch trough builds over the lake tonight. the low will remain over 
the hudson bay through the rest of the week extending 29.8 inch 
troughing southwest over lake superior.



lsz264-302100-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
400 am est tue dec 30 2025

.early this morning...north winds 20 to 30 knots. heavy freezing
spray and patchy fog. waves 5 to 9 feet occasionally to 11 feet. 
.today...northwest winds 15 to 25 knots diminishing to 10 to
20 knots by late morning, then veering north by mid afternoon.
freezing spray and patchy fog in the morning. a chance of snow
showers. waves subsiding to 1 to 3 feet. 
.tonight...north winds 15 to 25 knots increasing to 20 to
30 knots late. a chance of snow showers. heavy freezing spray
after midnight. waves building to 5 to 8 feet occasionally to
10 feet. 
.wednesday...northwest winds to 30 knots with a few gale force
gusts to 35 knots possible. heavy freezing spray. a chance of
snow showers. waves building to 8 to 11 feet occasionally to
14 feet. 
.wednesday night...northwest gales to 35 knots. heavy freezing
spray. waves subsiding to 7 to 10 feet occasionally to 13 feet,
then building to 8 to 11 feet occasionally to 14 feet. 
.thursday...northwest gales to 35 knots backing west in the
afternoon. heavy freezing spray. waves subsiding to 6 to 9 feet
occasionally to 11 feet. 
.thursday night...west gales to 35 knots veering northwest after
midnight. heavy freezing spray. waves subsiding to 5 to 8 feet
occasionally to 10 feet. 
.friday...northwest gales to 35 knots diminishing to 20 to
30 knots. heavy freezing spray. waves building to 6 to 9 feet
occasionally to 11 feet, then subsiding to 2 to 4 feet. 
.saturday...northwest winds 10 to 20 knots diminishing to 5 to
15 knots. waves subsiding to calm to 2 feet, then building to
1 to 3 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 300901
glfls 
expires:202512302100;;484567

open lake forecast for lake superior
national weather service marquette mi
400 am est tue dec 30 2025

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 29.0 inch low moves into eastern quebec this morning as 30.1 inch 
ridging overspreads the upper midwest. the low will continue to lift 
north and then retrograde westward to the hudson bay tonight into 
wednesday. as the aforementioned ridge slides southeast it will 
extend a 30.1 inch ridge over lake superior today, before a 29.9 
inch trough builds over the lake tonight. the low will remain over 
the hudson bay through the rest of the week extending 29.8 inch 
troughing southwest over lake superior.



lsz265-302100-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
400 am est tue dec 30 2025

.early this morning...northwest winds 20 to 30 knots. freezing
spray. a slight chance of snow showers. waves 6 to 9 feet
occasionally to 11 feet. 
.today...northwest winds 15 to 25 knots. freezing spray in the
morning. a chance of snow showers. waves subsiding to 2 to
4 feet. 
.tonight...northwest winds 15 to 25 knots increasing to 20 to
30 knots by midnight. a chance of snow showers. freezing spray
after midnight. waves building to 5 to 8 feet occasionally to
10 feet. 
.wednesday...northwest winds to 30 knots with a few gale force
gusts to 35 knots possible. heavy freezing spray. a chance of
snow showers. waves building to 8 to 11 feet occasionally to
14 feet. 
.wednesday night...northwest gales to 40 knots. heavy freezing
spray. a slight chance of snow showers. waves subsiding to 7 to
10 feet occasionally to 13 feet. 
.thursday...northwest gales to 40 knots becoming west gales to
35 knots in the afternoon. heavy freezing spray. a chance of snow
showers. waves subsiding to 5 to 8 feet occasionally to 10 feet. 
.thursday night...west gales to 35 knots veering northwest after
midnight. heavy freezing spray. a chance of snow showers. waves
5 to 8 feet occasionally to 10 feet. 
.friday...northwest gales to 35 knots. freezing spray. waves
subsiding to 2 to 4 feet. 
.saturday...northwest winds 15 to 25 knots. waves subsiding to
calm to 2 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 300901
glfls 
expires:202512302100;;484568

open lake forecast for lake superior
national weather service marquette mi
400 am est tue dec 30 2025

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 29.0 inch low moves into eastern quebec this morning as 30.1 inch 
ridging overspreads the upper midwest. the low will continue to lift 
north and then retrograde westward to the hudson bay tonight into 
wednesday. as the aforementioned ridge slides southeast it will 
extend a 30.1 inch ridge over lake superior today, before a 29.9 
inch trough builds over the lake tonight. the low will remain over 
the hudson bay through the rest of the week extending 29.8 inch 
troughing southwest over lake superior.



lsz266-302100-
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 tue dec 30 2025

...gale warning in effect until 7 am est this morning...

.early this morning...northwest gales to 35 knots. freezing
spray. a slight chance of snow showers. waves 10 to 14 feet
occasionally to 18 feet subsiding to 9 to 12 feet occasionally to
15 feet. 
.today...northwest winds 20 to 30 knots diminishing to 15 to
25 knots. freezing spray. a chance of snow showers. waves
subsiding to 3 to 6 feet occasionally to 8 feet. 
.tonight...northwest winds 15 to 25 knots becoming north 20 to
30 knots by midnight, then increasing to gales to 35 knots late.
freezing spray. patchy dense fog after midnight. a chance of snow
showers. waves building to 6 to 9 feet occasionally to 11 feet. 
.wednesday...northwest gales to 45 knots. heavy freezing spray.
snow showers. waves building to 10 to 14 feet occasionally to
18 feet. 
.wednesday night...northwest gales to 40 knots. heavy freezing
spray. a chance of snow showers. waves building to 11 to 15 feet
occasionally to 19 feet. 
.thursday...northwest gales to 35 knots backing west in the
afternoon. heavy freezing spray. a chance of snow showers. waves
subsiding to 10 to 14 feet occasionally to 18 feet. 
.thursday night...west gales to 40 knots becoming northwest gales
to 35 knots after midnight. freezing spray. a chance of snow
showers. waves subsiding to 8 to 11 feet occasionally to 14 feet.
.friday...northwest gales to 35 knots. freezing spray. a chance
of snow showers. waves subsiding to 3 to 6 feet occasionally to
8 feet. 
.saturday...northwest winds 15 to 25 knots. a chance of snow
showers. waves subsiding to 2 to 4 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 300901
glfls 
expires:202512302100;;484569

open lake forecast for lake superior
national weather service marquette mi
400 am est tue dec 30 2025

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 29.0 inch low moves into eastern quebec this morning as 30.1 inch 
ridging overspreads the upper midwest. the low will continue to lift 
north and then retrograde westward to the hudson bay tonight into 
wednesday. as the aforementioned ridge slides southeast it will 
extend a 30.1 inch ridge over lake superior today, before a 29.9 
inch trough builds over the lake tonight. the low will remain over 
the hudson bay through the rest of the week extending 29.8 inch 
troughing southwest over lake superior.



lsz267-302100-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
400 am est tue dec 30 2025

...gale warning in effect until 7 am est this morning...

.early this morning...northwest gales to 35 knots. freezing
spray. a slight chance of snow showers. waves 10 to 14 feet
occasionally to 18 feet subsiding to 9 to 12 feet occasionally to
15 feet. 
.today...northwest gales to 35 knots diminishing to 20 to
30 knots. freezing spray. a chance of snow showers. waves
subsiding to 3 to 6 feet occasionally to 8 feet. 
.tonight...northwest winds 20 to 30 knots veering north by
midnight. freezing spray. a chance of snow showers. waves
building to 5 to 8 feet occasionally to 10 feet. 
.wednesday...north gales to 35 knots becoming northwest gales to
40 knots. heavy freezing spray. snow showers likely. waves
building to 10 to 14 feet occasionally to 18 feet. 
.wednesday night...northwest gales to 40 knots. heavy freezing
spray. snow showers likely in the evening. a chance of snow
showers after midnight. waves building to 11 to 15 feet
occasionally to 19 feet. 
.thursday...northwest gales to 40 knots backing west in the
afternoon. heavy freezing spray. a chance of snow showers. waves
subsiding to 10 to 14 feet occasionally to 18 feet. 
.thursday night...west gales to 40 knots becoming northwest gales
to 35 knots after midnight. freezing spray. snow showers likely.
waves subsiding to 9 to 12 feet occasionally to 15 feet. 
.friday...northwest winds 20 to 30 knots. freezing spray. a
chance of snow showers. waves subsiding to 3 to 6 feet
occasionally to 8 feet. 
.saturday...northwest winds 15 to 25 knots. a chance of snow
showers. waves subsiding to 2 to 4 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 300901
glfls 
expires:202512302100;;484564

open lake forecast for lake superior
national weather service marquette mi
400 am est tue dec 30 2025

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 29.0 inch low moves into eastern quebec this morning as 30.1 inch 
ridging overspreads the upper midwest. the low will continue to lift 
north and then retrograde westward to the hudson bay tonight into 
wednesday. as the aforementioned ridge slides southeast it will 
extend a 30.1 inch ridge over lake superior today, before a 29.9 
inch trough builds over the lake tonight. the low will remain over 
the hudson bay through the rest of the week extending 29.8 inch 
troughing southwest over lake superior.



lsz162-302100-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am est tue dec 30 2025 /300 am cst tue dec 30 2025/

.early this morning...northwest winds 5 to 15 knots. waves 1 to
3 feet subsiding to calm to 2 feet. 
.today...west winds 5 to 15 knots veering northwest by mid
afternoon. patchy fog in the morning. a chance of snow showers in
the morning, then snow showers likely in the afternoon. waves
calm to 2 feet. 
.tonight...northwest winds 10 to 20 knots increasing to 15 to
25 knots by midnight. a chance of snow showers, possibly mixed
with freezing rain. waves building to 3 to 5 feet occasionally to
7 feet. 
.wednesday...northwest winds 15 to 25 knots increasing to 20 to
30 knots. a slight chance of snow showers in the morning. waves
3 to 5 feet occasionally to 7 feet. 
.wednesday night...northwest winds 15 to 25 knots. waves 3 to
5 feet occasionally to 7 feet. 
.thursday...west winds 15 to 25 knots. a chance of snow showers
in the afternoon. waves subsiding to 2 to 4 feet. 
.thursday night...west winds 15 to 25 knots. waves subsiding to
1 to 3 feet. 
.friday...west winds 10 to 20 knots veering northwest. waves
subsiding to calm to 2 feet. 
.saturday...northwest winds 5 to 15 knots increasing to 10 to
20 knots. waves calm to 2 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 300901
glfls 
expires:202512302100;;484565

open lake forecast for lake superior
national weather service marquette mi
400 am est tue dec 30 2025

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 29.0 inch low moves into eastern quebec this morning as 30.1 inch 
ridging overspreads the upper midwest. the low will continue to lift 
north and then retrograde westward to the hudson bay tonight into 
wednesday. as the aforementioned ridge slides southeast it will 
extend a 30.1 inch ridge over lake superior today, before a 29.9 
inch trough builds over the lake tonight. the low will remain over 
the hudson bay through the rest of the week extending 29.8 inch 
troughing southwest over lake superior.



lsz263-302100-
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 tue dec 30 2025

.early this morning...northwest winds 10 to 20 knots. waves 3 to
5 feet occasionally to 7 feet. 
.today...northwest winds 10 to 20 knots diminishing to 5 to
15 knots by late morning, then veering north by mid afternoon.
patchy dense fog in the morning. a chance of snow showers in the
morning, then snow showers likely in the afternoon. waves
subsiding to calm to 2 feet. 
.tonight...north winds 10 to 20 knots increasing to 15 to
25 knots by midnight, then backing northwest late. a chance of
snow showers. waves building to 3 to 6 feet occasionally to
8 feet. 
.wednesday...northwest winds 20 to 30 knots. heavy freezing
spray. a chance of snow showers. waves building to 4 to 7 feet
occasionally to 9 feet. 
.wednesday night...northwest winds 20 to 30 knots. heavy freezing
spray. waves building to 4 to 8 feet occasionally to 10 feet. 
.thursday...northwest winds 20 to 30 knots backing west in the
afternoon. heavy freezing spray. a chance of snow showers in the
afternoon. waves 5 to 8 feet occasionally to 10 feet. 
.thursday night...west winds 20 to 30 knots veering northwest
after midnight. freezing spray. a chance of snow showers. waves
subsiding to 4 to 7 feet occasionally to 9 feet. 
.friday...northwest winds 20 to 30 knots diminishing to 15 to
25 knots. waves subsiding to 1 to 3 feet. 
.saturday...northwest winds 5 to 15 knots. waves subsiding to
calm to 2 feet. 

note, wave height forecasts are for ice free areas.

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