fzus63 kdtx 101412
glflh 
expires:202512102215;;337544

open lake forecast for lake huron
national weather service detroit/pontiac mi
912 am est wed dec 10 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, 29.30 inches, tracks through through
southern lower michigan today. the system brings mostly snow to
lake huron with some rain farther south. a period of gales is
likely behind the low passage this afternoon and tonight over
much of southern lake huron.


lhz361-362-102215-
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-
912 am est wed dec 10 2025

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


$$

fzus63 kdtx 101412
glflh 
expires:202512102215;;337545

open lake forecast for lake huron
national weather service detroit/pontiac mi
912 am est wed dec 10 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, 29.30 inches, tracks through through
southern lower michigan today. the system brings mostly snow to
lake huron with some rain farther south. a period of gales is
likely behind the low passage this afternoon and tonight over
much of southern lake huron.


lhz363-462>464-102215-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
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-
912 am est wed dec 10 2025

...gale warning in effect through late tonight...

.rest of today...north winds 20 to 25 knots increasing to
30 knots late in the afternoon. gusts to 35 knot gales. snow and
rain late in the morning...then a chance of snow in the
afternoon. waves 6 to 9 feet building to 8 to 12 feet late in the
afternoon. waves occasionally around 15 feet. 
.tonight...northwest winds to 30 knots decreasing to 20 to
25 knots in the late evening and early morning...then increasing
to 30 knots early in the morning. gusts to 35 knot gales. a
chance of snow and freezing rain in the evening...then a chance
of snow after midnight. waves 10 to 14 feet. waves occasionally
around 18 feet. 
.thursday...northwest winds to 30 knots decreasing to 20 to
25 knots with gusts to around 30 knots in the late morning and
afternoon. a chance of snow. waves 8 to 12 feet. waves
occasionally around 15 feet. 
.thursday night...west winds 20 to 25 knots decreasing to 10 to
15 knots. waves 5 to 7 feet. waves occasionally around 10 feet. 
.friday...west winds 10 to 15 knots becoming southwest 15 to
20 knots late in the evening. a chance of snow late in the
afternoon. waves 3 to 5 feet subsiding to 2 to 4 feet late in the
morning...then building to 5 to 7 feet late in the evening. waves
occasionally around 10 feet. 
.saturday...west winds 20 to 25 knots. gusts to 30 knots. a
chance of snow. waves 8 to 12 feet. waves occasionally around
15 feet. 
.sunday...west winds to 30 knots becoming northwest 15 to
20 knots. a chance of snow until afternoon. waves 8 to 12 feet.
waves occasionally around 15 feet. 


$$

fzus63 kmkx 101502
glflm 
expires:202512102230;;338903

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
902 am cst wed dec 10 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...

north to northwest gales will continue today across the southern 
two thirds of lake michigan, behind departing strong low pressure 
around 29.2 inches. the brisk winds will gradually diminish 
tonight, as high pressure around 30.1 inches approaches from the 
west. a period of northwesterly gales may then return friday night
into saturday, as a strong arctic front moves through the great 
lakes region. heavy freezing spray may also develop later this 
week into the weekend, as the colder airmass moves in.


lmz261-362-364-563-102230-
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-
902 am cst wed dec 10 2025

sturgeon bay wi to point betsie mi north...

.rest of today...north winds to 30 kt becoming northwest. slight
chance of snow through mid morning, then chance of snow this
afternoon. waves 6 to 9 ft occasionally to 12 ft. 
.tonight...northwest winds to 30 kt diminishing to 15 to 25 kt.
chance of snow in the evening, then slight chance of snow
overnight. waves 5 to 8 ft occasionally to 10 ft subsiding to
4 to 7 ft occasionally to 9 ft. 
.thursday...northwest winds to 30 kt diminishing to 10 to 20 kt.
waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to 4 ft. 
.thursday night...northwest winds 10 to 15 kt diminishing to 5 to
10 kt. waves 1 to 3 ft subsiding to 1 ft or less. 
.friday...west winds 10 to 15 kt increasing to 10 to 20 kt.
chance of snow in the afternoon. waves 1 to 2 ft building to 2 to
4 ft. 
.friday night...west winds to 30 kt becoming northwest gales to
35 kt. chance of snow. waves 4 to 7 ft occasionally to 9 ft
building to 5 to 8 ft occasionally to 10 ft. 
.saturday...northwest gales to 35 kt diminishing to 30 kt.
freezing spray. chance of snow. waves 5 to 8 ft occasionally to
10 ft subsiding to 4 to 6 ft occasionally to 8 ft. 
.sunday...northwest winds to 30 kt. waves 4 to 7 ft occasionally
to 9 ft subsiding to 3 to 5 ft.  

$$

fzus63 kmkx 101502
glflm 
expires:202512102230;;338904

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
902 am cst wed dec 10 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...

north to northwest gales will continue today across the southern 
two thirds of lake michigan, behind departing strong low pressure 
around 29.2 inches. the brisk winds will gradually diminish 
tonight, as high pressure around 30.1 inches approaches from the 
west. a period of northwesterly gales may then return friday night
into saturday, as a strong arctic front moves through the great 
lakes region. heavy freezing spray may also develop later this 
week into the weekend, as the colder airmass moves in.


lmz366-565-567-868-102230-
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 pentwater to manistee mi 5 nm offshore to mid
lake-
902 am cst wed dec 10 2025

sturgeon bay wi to point betsie mi south to sheboygan wi to
pentwater mi...

...gale warning in effect until 6 pm cst this evening...

.rest of today...north gales to 35 kt becoming northwest to
30 kt. chance of snow. waves 8 to 12 ft occasionally to 16 ft. 
.tonight...northwest winds to 30 kt diminishing to 15 to 25 kt.
waves 7 to 10 ft occasionally to 13 ft subsiding to 5 to 8 ft
occasionally to 10 ft. 
.thursday...northwest winds 10 to 20 kt becoming west. waves 4 to
7 ft occasionally to 9 ft subsiding to 2 to 4 ft. 
.thursday night...west winds 5 to 10 kt. waves 1 to 3 ft
subsiding to 1 to 2 ft. 
.friday...west winds 10 to 15 kt increasing to 15 to 25 kt in the
afternoon. chance of snow in the afternoon. waves 1 to 2 ft
building to 3 to 5 ft. 
.friday night...west winds to 30 kt. freezing spray. chance of
snow. waves 7 to 10 ft occasionally to 13 ft. 
.saturday...northwest winds to 30 kt. freezing spray. chance of
snow. waves 7 to 10 ft occasionally to 13 ft. 
.sunday...northwest winds to 30 kt diminishing to 15 to 25 kt.
freezing spray. waves 6 to 9 ft occasionally to 12 ft.  

$$

fzus63 kmkx 101502
glflm 
expires:202512102230;;338905

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
902 am cst wed dec 10 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...

north to northwest gales will continue today across the southern 
two thirds of lake michigan, behind departing strong low pressure 
around 29.2 inches. the brisk winds will gradually diminish 
tonight, as high pressure around 30.1 inches approaches from the 
west. a period of northwesterly gales may then return friday night
into saturday, as a strong arctic front moves through the great 
lakes region. heavy freezing spray may also develop later this 
week into the weekend, as the colder airmass moves in.


lmz080-669-671-673-675-777-779-870-872-874-876-878-102230-
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-
902 am cst wed dec 10 2025

sheboygan wi to pentwater mi south...

...gale warning in effect until 6 pm cst this evening...

.rest of today...north gales to 40 kt becoming northwest gales to
35 kt. snow and rain through mid morning, then chance of snow
this afternoon. waves 8 to 12 ft occasionally to 16 ft building
to 12 to 16 ft occasionally to 21 ft. 
.tonight...northwest winds to 30 kt diminishing to 15 to 25 kt.
slight chance of snow in the evening. waves 10 to 14 ft
occasionally to 18 ft subsiding to 6 to 9 ft occasionally to
12 ft. 
.thursday...northwest winds 15 to 25 kt becoming west 10 to
20 kt. waves 5 to 8 ft occasionally to 10 ft subsiding to 3 to
5 ft. 
.thursday night...southwest winds 5 to 10 kt becoming south 10 to
15 kt. chance of snow. waves 2 to 4 ft subsiding to 1 to 3 ft. 
.friday...west winds 10 to 15 kt increasing to 15 to 25 kt in the
afternoon. chance of snow. waves 1 to 3 ft building to 4 to 6 ft
occasionally to 8 ft. 
.friday night...west winds to 30 kt. freezing spray. chance of
snow. waves 7 to 10 ft occasionally to 13 ft building to 8 to
12 ft occasionally to 16 ft. 
.saturday...northwest winds to 30 kt. freezing spray. chance of
snow. waves 8 to 12 ft occasionally to 16 ft subsiding to 7 to
10 ft occasionally to 13 ft. 
.sunday...northwest winds to 30 kt. freezing spray. waves 8 to
11 ft occasionally to 14 ft subsiding to 7 to 10 ft occasionally
to 13 ft.  

$$

fzus63 kmkx 100921
glflm 
expires:202512101645;;326448

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
321 am cst wed dec 10 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...

northerly gales will continues to develop this morning across the
southern two-thirds of lake michigan behind departing low
pressure. the brisk winds will then gradually diminish tonight, as
high pressure of 30.1 inches approaches from the west. a period 
of northwesterly gales may then return friday night into saturday 
as a strong arctic front moves through the great lakes region. 
heavy freezing spray may also develop late week into the weekend
as the colder airmass moves in.


lmz669-671-870-872-101645-
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 whitehall to pentwater mi 5 nm offshore to mid
lake-
lake michigan from grand haven to whitehall mi 5 nm offshore to
mid lake-
321 am cst wed dec 10 2025

sheboygan wi to pentwater mi south to north point light wi to
grand haven mi...

...gale warning in effect through this afternoon...

.today...north gales to 40 kt becoming northwest gales to 35 kt.
snow and slight chance of rain this morning, then chance of snow
this afternoon. waves 10 to 14 ft occasionally to 18 ft. 
.tonight...northwest winds to 30 kt diminishing to 15 to 25 kt.
waves 8 to 12 ft occasionally to 16 ft subsiding to 6 to 9 ft
occasionally to 12 ft. 
.thursday...northwest winds 15 to 25 kt becoming west 10 to
20 kt. waves 5 to 8 ft occasionally to 10 ft subsiding to 3 to
5 ft. 
.thursday night...west winds 5 to 10 kt becoming southwest.
chance of snow overnight. waves 2 to 4 ft subsiding to 1 to 2 ft.
.friday...west winds 10 to 15 kt increasing to 15 to 25 kt in the
afternoon. chance of snow. waves 1 to 3 ft building to 4 to 6 ft
occasionally to 8 ft. 
.friday night...west winds to 30 kt. freezing spray. chance of
snow. waves 7 to 10 ft occasionally to 13 ft building to 8 to
11 ft occasionally to 14 ft. 
.saturday...northwest winds to 30 kt. freezing spray. chance of
snow. waves 8 to 12 ft occasionally to 16 ft subsiding to 7 to
10 ft occasionally to 13 ft. 
.sunday...northwest winds to 30 kt. freezing spray. waves 8 to
11 ft occasionally to 14 ft subsiding to 6 to 9 ft occasionally
to 12 ft.  

$$

fzus63 kmqt 101501
glfls 
expires:202512102100;;338729

open lake forecast for lake superior
national weather service marquette mi
1000 am est wed dec 10 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...

29.5 to 29.6 troughing over lake superior this morning gradually 
weakens to 29.7 inches through this evening as a 29.2 inch low 
currently over southern lower michigan tracks to southern quebec at 
29.1 inches by tonight. this will allow 30.2 inch high pressure to 
rebuild over the northern plains later today through thursday while 
extending weak ridging over lake superior. ridging breaks down 
slightly on friday as a 29.8 inch trough drops out of northern 
ontario, but ridging quickly rebuilds this weekend as 30.6 inch high 
pressure over the northern plains extends back into the great lakes.



lsz267-102100-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
1000 am est wed dec 10 2025

.rest of today...north winds to 30 knots with a few gale force
gusts to 35 knots possible becoming northwest to 30 knots with a
few gale force gusts to 40 knots possible by mid afternoon.
freezing spray. a chance of snow showers. waves 5 to 8 feet
occasionally to 10 feet building to 7 to 10 feet occasionally to
13 feet. 
.tonight...north winds to 30 knots with a few gale force gusts to
40 knots possible diminishing to 20 to 30 knots late. freezing
spray in the evening. a chance of snow showers. waves building to
9 to 12 feet occasionally to 15 feet, then subsiding to 5 to
8 feet occasionally to 10 feet. 
.thursday...north winds 20 to 30 knots diminishing to 15 to
25 knots by late morning, then backing northwest by mid
afternoon. a chance of snow showers. waves subsiding to 2 to
4 feet. 
.thursday night...north winds 10 to 20 knots backing northwest
after midnight. a slight chance of snow showers. waves subsiding
to calm to 2 feet. 
.friday...west winds 10 to 20 knots backing southwest in the
afternoon. a chance of snow showers in the morning, then snow
showers likely in the afternoon. waves building to 1 to 3 feet. 
.friday night...west winds 20 to 30 knots becoming northwest
gales to 35 knots after midnight. snow showers. freezing spray
after midnight. waves building to 10 to 14 feet occasionally to
18 feet. 
.saturday...northwest gales to 35 knots becoming north 20 to
30 knots. freezing spray. snow showers. waves subsiding to 7 to
10 feet occasionally to 13 feet. 
.sunday...north winds 15 to 25 knots backing southwest. freezing
spray. a chance of snow showers. waves subsiding to 2 to 4 feet,
then building to 3 to 5 feet occasionally to 7 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 101501
glfls 
expires:202512102100;;338724

open lake forecast for lake superior
national weather service marquette mi
1000 am est wed dec 10 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...

29.5 to 29.6 troughing over lake superior this morning gradually 
weakens to 29.7 inches through this evening as a 29.2 inch low 
currently over southern lower michigan tracks to southern quebec at 
29.1 inches by tonight. this will allow 30.2 inch high pressure to 
rebuild over the northern plains later today through thursday while 
extending weak ridging over lake superior. ridging breaks down 
slightly on friday as a 29.8 inch trough drops out of northern 
ontario, but ridging quickly rebuilds this weekend as 30.6 inch high 
pressure over the northern plains extends back into the great lakes.



lsz162-102100-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 am est wed dec 10 2025 /900 am cst wed dec 10 2025/

.rest of today...north winds 15 to 25 knots backing northwest by
mid afternoon. waves 4 to 7 feet occasionally to 9 feet subsiding
to 2 to 4 feet. 
.tonight...northwest winds 15 to 25 knots diminishing to 10 to
20 knots by midnight. waves subsiding to calm to 2 feet. 
.thursday...northwest winds 5 to 15 knots backing west. waves
calm to 2 feet. 
.thursday night...west winds 5 to 15 knots. a slight chance of
snow showers after midnight. waves calm to 2 feet. 
.friday...west winds 10 to 20 knots increasing to 20 to 30 knots
in the afternoon. snow showers likely in the morning, then a
chance of snow showers in the afternoon. waves building to 3 to
5 feet occasionally to 7 feet. 
.friday night...northwest gales to 35 knots diminishing to 20 to
30 knots after midnight. waves building to 3 to 6 feet
occasionally to 8 feet. 
.saturday...northwest winds 20 to 30 knots. waves subsiding to
1 to 3 feet. 
.sunday...northwest winds 15 to 25 knots backing southwest. a
chance of snow showers. waves subsiding to calm to 2 feet, then
building to 3 to 5 feet occasionally to 7 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 101501
glfls 
expires:202512102100;;338725

open lake forecast for lake superior
national weather service marquette mi
1000 am est wed dec 10 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...

29.5 to 29.6 troughing over lake superior this morning gradually 
weakens to 29.7 inches through this evening as a 29.2 inch low 
currently over southern lower michigan tracks to southern quebec at 
29.1 inches by tonight. this will allow 30.2 inch high pressure to 
rebuild over the northern plains later today through thursday while 
extending weak ridging over lake superior. ridging breaks down 
slightly on friday as a 29.8 inch trough drops out of northern 
ontario, but ridging quickly rebuilds this weekend as 30.6 inch high 
pressure over the northern plains extends back into the great lakes.



lsz263-102100-
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-
1000 am est wed dec 10 2025

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

.rest of today...north winds 20 to 30 knots becoming northwest
15 to 25 knots by mid afternoon. freezing spray. waves 7 to
10 feet occasionally to 13 feet subsiding to 3 to 6 feet
occasionally to 8 feet. 
.tonight...northwest winds 15 to 25 knots becoming north 10 to
20 knots late. waves subsiding to 2 to 4 feet. 
.thursday...northwest winds 5 to 15 knots backing west by mid
afternoon. waves subsiding to calm to 2 feet. 
.thursday night...northwest winds 5 to 15 knots backing west
after midnight. a slight chance of snow showers after midnight.
waves calm to 2 feet. 
.friday...west winds 10 to 20 knots increasing to 20 to 30 knots
in the afternoon. a chance of snow showers in the morning, then
snow showers likely in the afternoon. waves building to 4 to
7 feet occasionally to 9 feet. 
.friday night...northwest winds 20 to 30 knots increasing to
gales to 35 knots after midnight. heavy freezing spray. a chance
of snow showers. waves building to 6 to 9 feet occasionally to
11 feet. 
.saturday...northwest winds 20 to 30 knots. heavy freezing spray.
waves subsiding to 4 to 7 feet occasionally to 9 feet. 
.sunday...northwest winds 15 to 25 knots becoming southwest 20 to
30 knots. a chance of snow showers. waves subsiding to calm to
2 feet, then building to 3 to 6 feet occasionally to 8 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 101501
glfls 
expires:202512102100;;338726

open lake forecast for lake superior
national weather service marquette mi
1000 am est wed dec 10 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...

29.5 to 29.6 troughing over lake superior this morning gradually 
weakens to 29.7 inches through this evening as a 29.2 inch low 
currently over southern lower michigan tracks to southern quebec at 
29.1 inches by tonight. this will allow 30.2 inch high pressure to 
rebuild over the northern plains later today through thursday while 
extending weak ridging over lake superior. ridging breaks down 
slightly on friday as a 29.8 inch trough drops out of northern 
ontario, but ridging quickly rebuilds this weekend as 30.6 inch high 
pressure over the northern plains extends back into the great lakes.



lsz264-102100-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
1000 am est wed dec 10 2025

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

.rest of today...north gales to 35 knots diminishing to 20 to
30 knots by late morning, then backing northwest by mid
afternoon. freezing spray. waves 7 to 10 feet occasionally to
13 feet subsiding to 5 to 8 feet occasionally to 10 feet, then
building to 6 to 9 feet occasionally to 11 feet. 
.tonight...northwest winds 20 to 30 knots becoming north 15 to
25 knots by midnight. freezing spray. waves subsiding to 3 to
6 feet occasionally to 8 feet. 
.thursday...north winds 15 to 25 knots becoming northwest 10 to
20 knots by late morning, then diminishing to 5 to 15 knots by
mid afternoon. waves subsiding to calm to 2 feet. 
.thursday night...northwest winds 5 to 15 knots. a slight chance
of snow showers after midnight. waves calm to 2 feet. 
.friday...west winds 10 to 20 knots increasing to 20 to 30 knots
in the afternoon. a chance of snow showers in the morning, then
snow showers likely in the afternoon. waves building to 3 to
6 feet occasionally to 8 feet. 
.friday night...northwest gales to 35 knots. heavy freezing
spray. snow showers likely in the evening. a chance of snow
showers after midnight. waves building to 8 to 11 feet
occasionally to 14 feet. 
.saturday...northwest gales to 35 knots. heavy freezing spray. a
chance of snow showers. waves subsiding to 5 to 8 feet
occasionally to 10 feet, then building to 6 to 9 feet
occasionally to 11 feet. 
.sunday...northwest winds 20 to 30 knots becoming southwest 15 to
25 knots. a chance of snow showers. waves subsiding to calm to
2 feet, then building to 3 to 6 feet occasionally to 8 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 101501
glfls 
expires:202512102100;;338727

open lake forecast for lake superior
national weather service marquette mi
1000 am est wed dec 10 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...

29.5 to 29.6 troughing over lake superior this morning gradually 
weakens to 29.7 inches through this evening as a 29.2 inch low 
currently over southern lower michigan tracks to southern quebec at 
29.1 inches by tonight. this will allow 30.2 inch high pressure to 
rebuild over the northern plains later today through thursday while 
extending weak ridging over lake superior. ridging breaks down 
slightly on friday as a 29.8 inch trough drops out of northern 
ontario, but ridging quickly rebuilds this weekend as 30.6 inch high 
pressure over the northern plains extends back into the great lakes.



lsz265-102100-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
1000 am est wed dec 10 2025

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

.rest of today...north gales to 35 knots backing northwest by mid
afternoon. freezing spray. a slight chance of snow showers. waves
6 to 10 feet occasionally to 13 feet. 
.tonight...northwest gales to 35 knots diminishing to 20 to
30 knots by midnight. a slight chance of snow showers. waves
subsiding to 4 to 7 feet occasionally to 9 feet. 
.thursday...northwest winds 20 to 30 knots diminishing to 10 to
20 knots. a slight chance of snow showers in the morning. waves
subsiding to 1 to 3 feet. 
.thursday night...northwest winds 10 to 20 knots backing west
after midnight. a slight chance of snow showers. waves subsiding
to calm to 2 feet. 
.friday...west winds 10 to 20 knots increasing to 20 to 30 knots
in the afternoon. a chance of snow showers in the morning, then
snow showers likely in the afternoon. waves building to 2 to
4 feet. 
.friday night...west gales to 35 knots becoming northwest gales
to 40 knots after midnight. freezing spray. snow showers likely.
waves building to 8 to 11 feet occasionally to 14 feet. 
.saturday...northwest gales to 40 knots. freezing spray. snow
showers likely. waves subsiding to 6 to 9 feet occasionally to
11 feet. 
.sunday...northwest winds 20 to 30 knots becoming southwest 15 to
25 knots. a chance of snow showers. 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 101501
glfls 
expires:202512102100;;338728

open lake forecast for lake superior
national weather service marquette mi
1000 am est wed dec 10 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...

29.5 to 29.6 troughing over lake superior this morning gradually 
weakens to 29.7 inches through this evening as a 29.2 inch low 
currently over southern lower michigan tracks to southern quebec at 
29.1 inches by tonight. this will allow 30.2 inch high pressure to 
rebuild over the northern plains later today through thursday while 
extending weak ridging over lake superior. ridging breaks down 
slightly on friday as a 29.8 inch trough drops out of northern 
ontario, but ridging quickly rebuilds this weekend as 30.6 inch high 
pressure over the northern plains extends back into the great lakes.



lsz266-102100-
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-
1000 am est wed dec 10 2025

...gale warning in effect until 10 pm est this evening...

.rest of today...north gales to 40 knots backing northwest by mid
afternoon. freezing spray. a chance of snow showers. waves 7 to
11 feet occasionally to 13 feet. 
.tonight...northwest gales to 40 knots becoming north gales to
35 knots by midnight, then diminishing to 20 to 30 knots late.
freezing spray in the evening. a chance of snow showers. waves
building to 10 to 14 feet occasionally to 18 feet, then subsiding
to 6 to 9 feet occasionally to 11 feet. 
.thursday...north winds 20 to 30 knots becoming northwest 15 to
25 knots. a chance of snow showers. waves subsiding to 2 to
4 feet. 
.thursday night...northwest winds 10 to 20 knots. a chance of
snow showers. waves subsiding to calm to 2 feet. 
.friday...west winds 10 to 20 knots increasing to 15 to 25 knots
in the afternoon. a chance of snow showers in the morning, then
snow showers likely in the afternoon. waves building to 3 to
5 feet occasionally to 7 feet. 
.friday night...west gales to 35 knots becoming northwest gales
to 40 knots after midnight. freezing spray. snow showers. waves
building to 10 to 14 feet occasionally to 18 feet. 
.saturday...northwest gales to 35 knots. freezing spray. snow
showers. waves building to 11 to 15 feet occasionally to 19 feet,
then subsiding to 9 to 12 feet occasionally to 15 feet. 
.sunday...northwest winds 20 to 30 knots becoming southwest 15 to
25 knots. freezing spray. a chance of snow showers. 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.

$$