fzus63 kdtx 210246
glflh 
expires:202512211100;;947053

open lake forecast for lake huron
national weather service detroit/pontiac mi
946 pm est sat dec 20 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, draws a pair of cold
fronts across the great lakes this evening. gale warnings are in
effect as gusty winds veer from southwest this evening to
northwest by sunday morning. high pressure, 30.50 inches, then
builds into the ohio valley daytime sunday.


lhz363-462>464-211100-
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-
946 pm est sat dec 20 2025

...gale warning in effect until 4 am est sunday...

.rest of tonight...west at 35 knot gales with gusts to 45 knot
gales decreasing to 30 knots with gusts to 40 knot gales after
midnight. waves 10 to 14 feet. waves occasionally around 18 feet.
.sunday...west winds 20 to 25 knots with gusts to around 30 knots
decreasing to 15 to 20 knots late in the afternoon. waves 8 to
12 feet. waves occasionally around 15 feet. 
.sunday night...west winds 10 to 15 knots becoming southwest
15 to 20 knots after midnight. waves 4 to 6 feet. waves
occasionally around 8 feet. 
.monday...southwest winds 15 to 20 knots. a chance of snow in the
afternoon. waves 4 to 6 feet. waves occasionally around 8 feet. 
.monday night...south winds 15 to 20 knots decreasing to 10 to
15 knots after midnight. snow likely in the evening...then a
chance of rain and snow after midnight. waves 4 to 6 feet. waves
occasionally around 8 feet. 
.tuesday...southwest winds 10 to 15 knots becoming west 15 to
20 knots late in the morning...then becoming northwest 20 to
25 knots late in the afternoon decreasing to 15 to 20 knots late
in the evening. waves 5 to 7 feet. waves occasionally around
10 feet. 
.wednesday...northwest winds 5 to 10 knots backing to the west in
the late morning and early afternoon...then becoming south 10 to
15 knots . a chance of rain . waves 3 to 5 feet subsiding to 1 to
3 feet in the late morning and early afternoon...then building to
3 to 5 feet . 
.thursday...south winds 5 to 10 knots increasing to 10 to
15 knots. waves 2 to 4 feet. 


$$

fzus63 kdtx 210246
glflh 
expires:202512211100;;947052

open lake forecast for lake huron
national weather service detroit/pontiac mi
946 pm est sat dec 20 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, draws a pair of cold
fronts across the great lakes this evening. gale warnings are in
effect as gusty winds veer from southwest this evening to
northwest by sunday morning. high pressure, 30.50 inches, then
builds into the ohio valley daytime sunday.


lhz361-362-211100-
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-
946 pm est sat dec 20 2025

...gale warning in effect until 7 am est sunday...

.rest of tonight...west at 35 knot gales decreasing to 30 knots
early in the morning. gusts to 45 knot gales. waves 12 to
16 feet. waves occasionally around 20 feet. 
.sunday...west winds to 30 knots with gusts to 35 knot gales
becoming northwest 15 to 20 knots. waves 10 to 14 feet subsiding
to 6 to 9 feet late in the afternoon. waves occasionally around
18 feet. 
.sunday night...southwest winds 10 to 15 knots. waves 3 to
5 feet. 
.monday...southwest winds 10 to 15 knots. a chance of snow in the
afternoon. waves 4 to 6 feet. waves occasionally around 8 feet. 
.monday night...south winds 15 to 20 knots decreasing to 10 to
15 knots after midnight. snow likely in the evening...then snow
likely and a chance of rain after midnight. waves 4 to 6 feet. 
.tuesday...southwest winds 10 to 15 knots becoming west 15 to
20 knots late in the morning...then increasing to 20 to 25 knots
with gusts to around 30 knots late in the afternoon becoming
northwest 15 to 20 knots late in the evening. waves 5 to 7 feet.
waves occasionally around 10 feet. 
.wednesday...west winds 5 to 10 knots backing to the south in the
late morning and early afternoon...then increasing to 10 to
15 knots . waves 2 to 4 feet building to 3 to 5 feet . 
.thursday...south winds 5 to 10 knots becoming southeast 10 to
15 knots until early evening...then veering to the south by
midnight. waves 3 to 5 feet. 


$$

fzus63 kmkx 210216
glflm 
expires:202512211030;;946515

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
816 pm cst sat dec 20 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...

low pressure of 29.3 inches will continue across ontario tonight.
widespread gales up to 40 kt with a few gusts up to 45 kt will
continue until after midnight, before easing during the predawn
hours. moderate freezing spray is anticipated as arctic air 
settles in, with pockets of heavy freezing spray possible.

winds will steadily diminish sunday as 30.5 inch high pressure 
slides across illinois and indiana. low pressure of 29.8 inches will
develop over the great plains on monday and track across the upper
great lakes monday night. southwest winds with 30 knot gusts are 
possible during the day monday, though gale potential is low at 
this time. winds will weaken tuesday through wednesday as the 
next area of high pressure of 30.4 inches crosses the great lakes.


lmz080-669-671-673-675-777-779-870-872-874-876-878-211030-
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-
816 pm cst sat dec 20 2025

sheboygan wi to pentwater mi south...

...gale warning in effect until 3 am cst sunday...

.rest of tonight...west gales to 40 kt becoming northwest to
30 kt. freezing spray. slight chance of light freezing rain.
waves 10 to 14 ft occasionally to 18 ft. 
.sunday...northwest winds 15 to 25 kt diminishing to 10 to 20 kt
late in the morning, then becoming west early in the afternoon
becoming southwest 10 to 15 kt late. freezing spray in the
morning. waves 7 to 10 ft occasionally to 13 ft subsiding to 2 to
4 ft. 
.sunday night...southwest winds 10 to 15 kt becoming south 10 to
20 kt. waves 2 to 4 ft building to 4 to 6 ft occasionally to
8 ft. 
.monday...south winds to 30 kt. chance of snow in the morning.
waves 6 to 9 ft occasionally to 12 ft. 
.monday night...south winds 10 to 20 kt becoming southwest. waves
5 to 8 ft occasionally to 10 ft subsiding to 4 to 6 ft
occasionally to 8 ft. 
.tuesday...west winds 10 to 20 kt becoming northwest. waves 3 to
5 ft. 
.tuesday night...north winds 10 to 20 kt veering to northeast
10 to 15 kt. waves 3 to 5 ft subsiding to 2 to 4 ft. 
.wednesday...southeast winds 10 to 20 kt becoming south 15 to
25 kt. chance of rain. waves 3 to 5 ft. 
.thursday...south winds 10 to 15 kt increasing to 10 to 20 kt.
waves 2 to 4 ft.  

$$

fzus63 kmkx 210216
glflm 
expires:202512211030;;946514

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
816 pm cst sat dec 20 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...

low pressure of 29.3 inches will continue across ontario tonight.
widespread gales up to 40 kt with a few gusts up to 45 kt will
continue until after midnight, before easing during the predawn
hours. moderate freezing spray is anticipated as arctic air 
settles in, with pockets of heavy freezing spray possible.

winds will steadily diminish sunday as 30.5 inch high pressure 
slides across illinois and indiana. low pressure of 29.8 inches will
develop over the great plains on monday and track across the upper
great lakes monday night. southwest winds with 30 knot gusts are 
possible during the day monday, though gale potential is low at 
this time. winds will weaken tuesday through wednesday as the 
next area of high pressure of 30.4 inches crosses the great lakes.


lmz261-362-364-366-563-565-567-868-211030-
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-
816 pm cst sat dec 20 2025

sheboygan wi to pentwater mi north...

...gale warning in effect until 3 am cst sunday...

.rest of tonight...west gales to 40 kt becoming northwest to
30 kt. freezing spray. waves 10 to 14 ft occasionally to 18 ft
subsiding to 7 to 10 ft occasionally to 13 ft. 
.sunday...northwest winds to 30 kt diminishing to 15 to 25 kt
late in the morning, then becoming west 10 to 20 kt early in the
afternoon becoming southwest late. freezing spray in the morning.
waves 5 to 8 ft occasionally to 10 ft subsiding to 2 to 4 ft. 
.sunday night...southwest winds 10 to 20 kt increasing to 15 to
25 kt. waves 4 to 6 ft occasionally to 8 ft. 
.monday...southwest winds 15 to 25 kt becoming south to 30 kt.
snow likely in the morning, then snow likely with a chance of
rain in the afternoon. waves 6 to 9 ft occasionally to 12 ft. 
.monday night...south winds 10 to 20 kt becoming southwest.
chance of snow in the evening. waves 5 to 8 ft occasionally to
10 ft subsiding to 4 to 6 ft occasionally to 8 ft. 
.tuesday...west winds 10 to 20 kt becoming northwest 15 to 25 kt.
waves 3 to 5 ft. 
.tuesday night...northwest winds 15 to 25 kt becoming north 5 to
10 kt. waves 2 to 4 ft subsiding to 1 to 3 ft. 
.wednesday...south winds 10 to 20 kt. waves 2 to 4 ft building to
3 to 5 ft. 
.thursday...southeast winds 10 to 20 kt becoming south. waves
2 to 4 ft.  

$$

fzus63 kmqt 210301
glfls 
expires:202512210900;;947391

open lake forecast for lake superior
national weather service marquette mi
1000 pm est sat dec 20 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 low pressure of around 29.3 inches continues its track eastward 
into quebec tonight. this is then followed by a 30.3 inch high over 
the canadian prairies sliding southeast into the ohio river valley 
late this weekend, building to 30.7 inches by monday morning as it 
continues towards the mid-atlantic. lake superior remains under the 
influence of this high until a weakening 29.9 inch low moves across 
the lake monday night through tuesday morning. afterwards, a 30.3 
inch high pressure moves over lake superior from the canadian 
prairies tuesday night with weak troughing of 30.0 inches moving 
over the lake lake wednesday as the high shifts east. this will be 
followed by low pressure of around 29.7 inches moving across the 
great lakes basin late thursday into friday.



lsz265-210900-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
1000 pm est sat dec 20 2025

...gale warning in effect until 7 am est sunday...
...heavy freezing spray warning in effect until 8 am est sunday...

.rest of tonight...northwest gales to 45 knots. freezing spray. a
chance of snow showers. waves 10 to 14 feet occasionally to
18 feet subsiding to 5 to 8 feet occasionally to 10 feet. 
.sunday...northwest winds 20 to 30 knots becoming west 15 to
25 knots by late morning, then diminishing to 10 to 20 knots by
mid afternoon. freezing spray in the morning. a slight chance of
snow showers in the morning. waves subsiding to 1 to 3 feet. 
.sunday night...southwest winds 10 to 20 knots. waves subsiding
to calm to 2 feet. 
.monday...southwest winds 10 to 20 knots backing south in the
afternoon. a chance of snow showers. waves calm to 2 feet. 
.monday night...south winds 10 to 20 knots becoming west 15 to
25 knots after midnight. a chance of snow showers. waves building
to 1 to 3 feet. 
.tuesday...west gales to 35 knots veering northwest in the
afternoon. waves building to 5 to 9 feet occasionally to 11 feet.
.tuesday night...northwest winds 20 to 30 knots becoming south
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.wednesday...south winds 10 to 20 knots becoming southwest 5 to
15 knots. waves calm to 2 feet. 
.thursday...south winds 15 to 25 knots becoming west 20 to
30 knots. waves building to 3 to 5 feet occasionally to 7 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 210301
glfls 
expires:202512210900;;947392

open lake forecast for lake superior
national weather service marquette mi
1000 pm est sat dec 20 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 low pressure of around 29.3 inches continues its track eastward 
into quebec tonight. this is then followed by a 30.3 inch high over 
the canadian prairies sliding southeast into the ohio river valley 
late this weekend, building to 30.7 inches by monday morning as it 
continues towards the mid-atlantic. lake superior remains under the 
influence of this high until a weakening 29.9 inch low moves across 
the lake monday night through tuesday morning. afterwards, a 30.3 
inch high pressure moves over lake superior from the canadian 
prairies tuesday night with weak troughing of 30.0 inches moving 
over the lake lake wednesday as the high shifts east. this will be 
followed by low pressure of around 29.7 inches moving across the 
great lakes basin late thursday into friday.



lsz266-210900-
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 pm est sat dec 20 2025

...gale warning in effect until 7 am est sunday...
...heavy freezing spray warning in effect until 8 am est sunday...

.rest of tonight...northwest gales to 45 knots. freezing spray.
snow showers likely late in the evening. a chance of snow showers
after midnight. waves 15 to 20 feet occasionally to 25 feet
subsiding to 10 to 14 feet occasionally to 18 feet. 
.sunday...northwest winds 15 to 25 knots becoming west 10 to
20 knots by late morning, then increasing to 15 to 25 knots by
mid afternoon. freezing spray in the morning. a chance of snow
showers. waves subsiding to 3 to 5 feet occasionally to 7 feet. 
.sunday night...southwest winds 15 to 25 knots. waves subsiding
to 2 to 4 feet. 
.monday...southwest winds 15 to 25 knots backing south in the
afternoon. a chance of snow showers. waves building to 3 to
5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. 
.monday night...south winds 15 to 25 knots. a chance of snow
showers. waves 2 to 4 feet. 
.tuesday...west gales to 35 knots veering northwest in the
afternoon. waves building to 10 to 14 feet occasionally to
18 feet. 
.tuesday night...northwest gales to 35 knots diminishing to 10 to
20 knots after midnight. waves subsiding to 2 to 4 feet. 
.wednesday...south winds 15 to 25 knots becoming southwest 10 to
20 knots. waves subsiding to 1 to 3 feet, then building to 3 to
5 feet occasionally to 7 feet. 
.thursday...south winds 15 to 25 knots becoming west 20 to
30 knots. waves building to 4 to 7 feet occasionally to 9 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 210301
glfls 
expires:202512210900;;947393

open lake forecast for lake superior
national weather service marquette mi
1000 pm est sat dec 20 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 low pressure of around 29.3 inches continues its track eastward 
into quebec tonight. this is then followed by a 30.3 inch high over 
the canadian prairies sliding southeast into the ohio river valley 
late this weekend, building to 30.7 inches by monday morning as it 
continues towards the mid-atlantic. lake superior remains under the 
influence of this high until a weakening 29.9 inch low moves across 
the lake monday night through tuesday morning. afterwards, a 30.3 
inch high pressure moves over lake superior from the canadian 
prairies tuesday night with weak troughing of 30.0 inches moving 
over the lake lake wednesday as the high shifts east. this will be 
followed by low pressure of around 29.7 inches moving across the 
great lakes basin late thursday into friday.



lsz267-210900-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
1000 pm est sat dec 20 2025

...gale warning in effect until 7 am est sunday...
...heavy freezing spray warning in effect until 8 am est sunday...

.rest of tonight...northwest gales to 45 knots. freezing spray.
snow showers. waves 15 to 20 feet occasionally to 25 feet
subsiding to 10 to 14 feet occasionally to 18 feet. 
.sunday...northwest winds 20 to 30 knots diminishing to 15 to
25 knots by late morning, then backing west by mid afternoon.
freezing spray in the morning. a chance of snow showers. waves
subsiding to 3 to 5 feet occasionally to 7 feet. 
.sunday night...southwest winds 15 to 25 knots. a slight chance
of snow showers in the evening. waves subsiding to 2 to 4 feet. 
.monday...southwest winds 15 to 25 knots backing south in the
afternoon. a chance of snow showers. waves building to 3 to
5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. 
.monday night...south winds 15 to 25 knots. snow showers likely
in the evening, then a chance of snow showers after midnight.
waves subsiding to 1 to 3 feet. 
.tuesday...west winds 20 to 30 knots becoming northwest gales to
35 knots in the afternoon. a chance of snow showers. waves
building to 10 to 14 feet occasionally to 18 feet. 
.tuesday night...northwest winds 20 to 30 knots diminishing to
10 to 20 knots after midnight. waves subsiding to 2 to 4 feet. 
.wednesday...south winds 10 to 20 knots veering southwest. waves
subsiding to 1 to 3 feet, then building to 2 to 4 feet. 
.thursday...south winds 15 to 25 knots becoming west 20 to
30 knots. a chance of rain showers. waves building to 5 to 8 feet
occasionally to 10 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 210301
glfls 
expires:202512210900;;947388

open lake forecast for lake superior
national weather service marquette mi
1000 pm est sat dec 20 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 low pressure of around 29.3 inches continues its track eastward 
into quebec tonight. this is then followed by a 30.3 inch high over 
the canadian prairies sliding southeast into the ohio river valley 
late this weekend, building to 30.7 inches by monday morning as it 
continues towards the mid-atlantic. lake superior remains under the 
influence of this high until a weakening 29.9 inch low moves across 
the lake monday night through tuesday morning. afterwards, a 30.3 
inch high pressure moves over lake superior from the canadian 
prairies tuesday night with weak troughing of 30.0 inches moving 
over the lake lake wednesday as the high shifts east. this will be 
followed by low pressure of around 29.7 inches moving across the 
great lakes basin late thursday into friday.



lsz162-210900-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 pm est sat dec 20 2025 /900 pm cst sat dec 20 2025/

...gale warning in effect until 1 am est /midnight cst/ sunday...
...heavy freezing spray warning in effect until 7 am est /6 am
cst/ sunday...

.rest of tonight...northwest gales to 35 knots diminishing to
15 to 25 knots. heavy freezing spray late in the evening. waves
7 to 10 feet occasionally to 13 feet subsiding to 2 to 4 feet. 
.sunday...west winds 10 to 20 knots backing southwest by mid
afternoon. waves subsiding to 1 to 3 feet. 
.sunday night...southwest winds 10 to 20 knots. waves subsiding
to calm to 2 feet. 
.monday...south winds 10 to 20 knots backing east in the
afternoon. a chance of snow showers. waves calm to 2 feet. 
.monday night...southeast winds 10 to 20 knots veering west after
midnight. a chance of snow showers. waves calm to 2 feet. 
.tuesday...west winds 15 to 25 knots becoming northwest 10 to
20 knots in the afternoon. waves building to 1 to 3 feet, then
subsiding to calm to 2 feet. 
.tuesday night...north winds 5 to 15 knots veering south after
midnight. waves calm to 2 feet. 
.wednesday...southwest winds 5 to 15 knots backing east. waves
calm to 2 feet. 
.thursday...south winds 10 to 20 knots veering west. waves
building to 1 to 3 feet, then subsiding to calm to 2 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 210301
glfls 
expires:202512210900;;947389

open lake forecast for lake superior
national weather service marquette mi
1000 pm est sat dec 20 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 low pressure of around 29.3 inches continues its track eastward 
into quebec tonight. this is then followed by a 30.3 inch high over 
the canadian prairies sliding southeast into the ohio river valley 
late this weekend, building to 30.7 inches by monday morning as it 
continues towards the mid-atlantic. lake superior remains under the 
influence of this high until a weakening 29.9 inch low moves across 
the lake monday night through tuesday morning. afterwards, a 30.3 
inch high pressure moves over lake superior from the canadian 
prairies tuesday night with weak troughing of 30.0 inches moving 
over the lake lake wednesday as the high shifts east. this will be 
followed by low pressure of around 29.7 inches moving across the 
great lakes basin late thursday into friday.



lsz263-210900-
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 pm est sat dec 20 2025

...gale warning in effect until 1 am est sunday...
...heavy freezing spray warning in effect until 7 am est sunday...

.rest of tonight...northwest gales to 35 knots diminishing to
15 to 25 knots late. heavy freezing spray. a slight chance of
snow showers. waves 10 to 14 feet occasionally to 18 feet
subsiding to 3 to 6 feet occasionally to 8 feet. 
.sunday...west winds 10 to 20 knots backing southwest by mid
afternoon. a slight chance of snow showers in the morning. waves
subsiding to 2 to 4 feet. 
.sunday night...southwest winds 10 to 20 knots diminishing to
5 to 15 knots by midnight. waves subsiding to 1 to 3 feet. 
.monday...south winds 5 to 15 knots backing southeast in the
afternoon. a slight chance of snow showers. waves subsiding to
calm to 2 feet. 
.monday night...southeast winds 5 to 15 knots becoming west 15 to
25 knots after midnight. a chance of snow showers. waves building
to 2 to 4 feet. 
.tuesday...west winds 15 to 25 knots veering northwest in the
afternoon. waves building to 3 to 6 feet occasionally to 8 feet. 
.tuesday night...northwest winds 10 to 20 knots becoming south
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.wednesday...southwest winds 10 to 20 knots becoming east 5 to
15 knots. waves calm to 2 feet. 
.thursday...south winds 15 to 25 knots veering west. waves
building to 3 to 5 feet occasionally to 7 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 210301
glfls 
expires:202512210900;;947390

open lake forecast for lake superior
national weather service marquette mi
1000 pm est sat dec 20 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 low pressure of around 29.3 inches continues its track eastward 
into quebec tonight. this is then followed by a 30.3 inch high over 
the canadian prairies sliding southeast into the ohio river valley 
late this weekend, building to 30.7 inches by monday morning as it 
continues towards the mid-atlantic. lake superior remains under the 
influence of this high until a weakening 29.9 inch low moves across 
the lake monday night through tuesday morning. afterwards, a 30.3 
inch high pressure moves over lake superior from the canadian 
prairies tuesday night with weak troughing of 30.0 inches moving 
over the lake lake wednesday as the high shifts east. this will be 
followed by low pressure of around 29.7 inches moving across the 
great lakes basin late thursday into friday.



lsz264-210900-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
1000 pm est sat dec 20 2025

...gale warning in effect until 7 am est sunday...
...heavy freezing spray warning in effect until 7 am est sunday...

.rest of tonight...northwest gales to 35 knots diminishing to
20 to 30 knots late. freezing spray. a slight chance of snow
showers. waves 11 to 15 feet occasionally to 19 feet subsiding to
5 to 8 feet occasionally to 10 feet. 
.sunday...northwest winds 10 to 20 knots backing west. a slight
chance of snow showers in the morning. waves subsiding to 2 to
4 feet. 
.sunday night...west winds 10 to 20 knots diminishing to 5 to
15 knots by midnight, then backing southwest late. waves
subsiding to 1 to 3 feet. 
.monday...south winds 5 to 15 knots. a slight chance of snow
showers in the afternoon. waves subsiding to calm to 2 feet. 
.monday night...south winds 5 to 15 knots becoming west 15 to
25 knots after midnight. a chance of snow showers. waves building
to 2 to 4 feet. 
.tuesday...west winds 20 to 30 knots veering northwest in the
afternoon. waves building to 4 to 8 feet occasionally to 10 feet.
.tuesday night...northwest winds 15 to 25 knots becoming south
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.wednesday...south winds 10 to 20 knots becoming east 5 to
15 knots. waves building to 1 to 3 feet, then subsiding to calm
to 2 feet. 
.thursday...south winds 15 to 25 knots becoming west 20 to
30 knots. waves building to 4 to 7 feet occasionally to 9 feet. 

note, wave height forecasts are for ice free areas.

$$