fzus63 kdtx 200835
glflh 
expires:202512201645;;904708

open lake forecast for lake huron
national weather service detroit/pontiac mi
335 am 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, will track across northern
ontario saturday, driving a weak lead cold front across the great
lakes quickly followed by another arctic cold front. strong wind
fields will be present ahead of the lead front and in the wake of
the arctic front, leading to another round of gales on lake huron
saturday and saturday night. high pressure, 30.50 inches, will
expand into the western great lakes on sunday, bringing dry
conditions and weakening winds.


lhz363-462>464-201645-
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-
335 am est sat dec 20 2025

...gale warning in effect from 7 am est this morning through late
tonight...

.today...south winds 20 to 25 knots increasing to 30 knots in the
late morning and early afternoon...then becoming southwest 20 to
25 knots late in the afternoon. gusts to 35 knot gales. a chance
of snow in the morning...then a chance of snow and rain in the
afternoon. waves 8 to 12 feet. waves occasionally around 15 feet.
.tonight...west winds to 30 knots with gusts to 35 knot gales.
freezing spray 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 early in the afternoon. freezing
spray in the morning. waves 10 to 14 feet. waves occasionally
around 18 feet. 
.sunday night...west winds 10 to 15 knots. waves 4 to 6 feet.
waves occasionally around 8 feet. 
.monday...southwest winds 15 to 20 knots backing to the south
late in the evening. a chance of snow. a chance of rain late in
the evening. waves 4 to 6 feet. waves occasionally around 8 feet.
.tuesday...south winds 10 to 15 knots veering to the west in the
late morning and early afternoon...then increasing to 15 to
20 knots early in the evening becoming northwest 10 to 15 knots
by midnight. waves 5 to 7 feet. waves occasionally around
10 feet. 
.wednesday...northwest winds 5 to 10 knots becoming south 10 to
15 knots. a chance of rain . waves 3 to 5 feet subsiding to 2 to
4 feet. 


$$

fzus63 kdtx 200835
glflh 
expires:202512201645;;904707

open lake forecast for lake huron
national weather service detroit/pontiac mi
335 am 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, will track across northern
ontario saturday, driving a weak lead cold front across the great
lakes quickly followed by another arctic cold front. strong wind
fields will be present ahead of the lead front and in the wake of
the arctic front, leading to another round of gales on lake huron
saturday and saturday night. high pressure, 30.50 inches, will
expand into the western great lakes on sunday, bringing dry
conditions and weakening winds.


lhz361-362-201645-
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-
335 am est sat dec 20 2025

...gale warning in effect from this afternoon through sunday
morning...

.today...south winds 20 to 25 knots with gusts to around
30 knots. a chance of snow. waves 8 to 12 feet. waves
occasionally around 15 feet. 
.tonight...west winds to 30 knots increasing to 35 knot gales
after midnight...then decreasing to 30 knots early in the
morning. gusts to 40 knot gales. freezing spray after midnight.
waves 12 to 16 feet. waves occasionally around 20 feet. 
.sunday...west winds to 30 knots becoming northwest 15 to
20 knots. freezing spray in the morning. waves 12 to 16 feet
subsiding to 8 to 12 feet early in the afternoon. waves
occasionally around 20 feet. 
.sunday night...west winds 10 to 15 knots backing to the
southwest after midnight. waves 4 to 6 feet. waves occasionally
around 8 feet. 
.monday...southwest winds 15 to 20 knots becoming south 10 to
15 knots late in the evening. a chance of snow late in the
morning. snow likely late in the afternoon. a chance of rain late
in the evening. waves 4 to 6 feet. 
.tuesday...southwest winds 10 to 15 knots becoming west 15 to
20 knots in the late morning and early afternoon...then becoming
northwest 20 to 25 knots early in the evening decreasing to 10 to
15 knots by midnight. waves 6 to 9 feet. waves occasionally
around 12 feet. 
.wednesday...northwest winds 5 to 10 knots becoming south 10 to
15 knots. waves 3 to 5 feet subsiding to 1 to 3 feet until early
evening...then building to 2 to 4 feet by midnight. 


$$

fzus63 kmkx 200820
glflm 
expires:202512201615;;904263

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
220 am 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...

30.2 inch high pressure currently centered over ohio will 
continue to drift east early this morning, while 29.3 inch low 
pressure continues to move east into ontario. the progression of 
the low and the high will result in increasing southerly winds 
across the open waters from predawn through late morning today. 
gusts will periodically exceed gale force, with a gale warning 
having gone into effect at 2 am cst early this morning. a brief 
decrease in gusts may occur from late morning into the early 
afternoon as a cold front approaches and begins to cross lake 
michigan. the passing boundary will result in a west-northwest 
wind shift across the waters. west-northwest gusts will then 
quickly increase in the wake of the passing front by late 
afternoon, when a return of widespread gales is anticipated across
the open waters. gales will continue into the predawn hours 
sunday, with the ongoing gale warning remaining in effect until 3 
am cst. snow and rain-snow mix will accompany the 
approaching/passing cold front this morning and afternoon. areas 
of moderate freezing spray are expected this evening as arctic air
settles in behind the departed front. pockets of heavy freezing 
spray are possible, though conditions aren't expected to be 
widespread enough to warrant headlines at this time. trends will 
continue to be monitored in the coming forecasts.

winds will steadily taper over the open waters sunday morning and 
afternoon as 30.4 inch high pressure settles into the western 
great lakes. said high will move east of lake michigan sunday 
night into monday as 29.8 inch low pressure builds in the 
northern great plains, resulting in a south to southwest wind 
shift. 25-30 knot gusts are possible during the day monday, though
gale potential is low at this time. trends will continue to be 
monitored. winds will shift out of the west-northwest and weaken 
tuesday through tuesday night as the next area of high pressure 
moves into the northern great plains.


lmz080-669-671-673-675-777-779-870-872-874-876-878-201615-
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-
220 am cst sat dec 20 2025

sheboygan wi to pentwater mi south...

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

.today...southwest gales to 40 kt diminishing to gales to 35 kt
late this morning, then becoming west to 30 kt early this
afternoon increasing to gales to 35 kt late. chance of rain and
slight chance of snow this morning, then slight chance of rain
and snow this afternoon. waves 10 to 14 ft occasionally to 18 ft
subsiding to 8 to 12 ft occasionally to 16 ft. 
.tonight...west gales to 40 kt becoming northwest to 30 kt.
freezing spray overnight. waves 10 to 14 ft occasionally to
18 ft. 
.sunday...northwest winds to 30 kt diminishing to 10 to 20 kt
late in the morning, then becoming west early in the afternoon
diminishing to 10 to 15 kt late. freezing spray in the morning.
waves 8 to 11 ft occasionally to 14 ft subsiding to 3 to 5 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. 
.wednesday...southeast winds 10 to 20 kt becoming south. waves
3 to 5 ft.  

$$

fzus63 kmkx 200820
glflm 
expires:202512201615;;904262

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
220 am 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...

30.2 inch high pressure currently centered over ohio will 
continue to drift east early this morning, while 29.3 inch low 
pressure continues to move east into ontario. the progression of 
the low and the high will result in increasing southerly winds 
across the open waters from predawn through late morning today. 
gusts will periodically exceed gale force, with a gale warning 
having gone into effect at 2 am cst early this morning. a brief 
decrease in gusts may occur from late morning into the early 
afternoon as a cold front approaches and begins to cross lake 
michigan. the passing boundary will result in a west-northwest 
wind shift across the waters. west-northwest gusts will then 
quickly increase in the wake of the passing front by late 
afternoon, when a return of widespread gales is anticipated across
the open waters. gales will continue into the predawn hours 
sunday, with the ongoing gale warning remaining in effect until 3 
am cst. snow and rain-snow mix will accompany the 
approaching/passing cold front this morning and afternoon. areas 
of moderate freezing spray are expected this evening as arctic air
settles in behind the departed front. pockets of heavy freezing 
spray are possible, though conditions aren't expected to be 
widespread enough to warrant headlines at this time. trends will 
continue to be monitored in the coming forecasts.

winds will steadily taper over the open waters sunday morning and 
afternoon as 30.4 inch high pressure settles into the western 
great lakes. said high will move east of lake michigan sunday 
night into monday as 29.8 inch low pressure builds in the 
northern great plains, resulting in a south to southwest wind 
shift. 25-30 knot gusts are possible during the day monday, though
gale potential is low at this time. trends will continue to be 
monitored. winds will shift out of the west-northwest and weaken 
tuesday through tuesday night as the next area of high pressure 
moves into the northern great plains.


lmz261-362-364-366-563-565-567-868-201615-
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-
220 am cst sat dec 20 2025

sheboygan wi to pentwater mi north...

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

.today...south gales to 35 kt becoming west gales to 40 kt.
chance of snow this morning, then slight chance of snow this
afternoon. waves 10 to 14 ft occasionally to 18 ft subsiding to
8 to 12 ft occasionally to 16 ft. 
.tonight...west gales to 45 kt becoming northwest gales to 35 kt.
freezing spray. slight chance of light freezing rain. 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 in the
afternoon. freezing spray in the morning. waves 6 to 9 ft
occasionally to 12 ft subsiding to 1 to 3 ft. 
.sunday night...southwest winds 10 to 20 kt increasing to 15 to
25 kt. waves 2 to 4 ft building to 4 to 6 ft occasionally to
8 ft. 
.monday...southwest winds to 30 kt becoming south. chance of snow
in the morning, then snow likely in the afternoon. waves 6 to
9 ft occasionally to 12 ft. 
.monday night...south winds 10 to 20 kt becoming southwest.
chance of rain and snow. 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 subsiding to 2 to 4 ft. 
.wednesday...south winds 10 to 20 kt. waves 3 to 5 ft.  

$$

fzus63 kmqt 200900
glfls 
expires:202512202100;;905574

open lake forecast for lake superior
national weather service marquette mi
400 am 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 will track north of lake 
superior today. 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 on wednesday as the high shifts east.



lsz265-202100-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
400 am est sat dec 20 2025

...gale warning in effect from 11 am est this morning through
sunday morning...
...heavy freezing spray warning in effect from 4 pm est this
afternoon through sunday morning...

.early this morning...south gales to 35 knots. freezing spray.
snow showers. waves 5 to 9 feet occasionally to 11 feet. 
.today...southwest gales to 35 knots becoming west gales to
45 knots. snow showers. freezing spray in the afternoon. waves
subsiding to 3 to 6 feet occasionally to 8 feet, then building to
10 to 14 feet occasionally to 18 feet. 
.tonight...northwest gales to 45 knots with a few storm force
gusts to 50 knots possible diminishing to gales to 45 knots by
midnight. 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. 
.sunday...northwest winds 20 to 30 knots becoming west 15 to
25 knots. freezing spray in the morning. a chance of snow showers
in the morning. waves subsiding to calm to 2 feet. 
.sunday night...southwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. waves 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 becoming northwest 15 to
25 knots. waves building to 5 to 8 feet occasionally to 10 feet,
then subsiding to calm to 2 feet. 
.wednesday...south winds 10 to 20 knots. 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 200900
glfls 
expires:202512202100;;905575

open lake forecast for lake superior
national weather service marquette mi
400 am 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 will track north of lake 
superior today. 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 on wednesday as the high shifts east.



lsz266-202100-
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 sat dec 20 2025

...gale warning in effect through sunday morning...
...heavy freezing spray warning in effect from 4 pm est this
afternoon through sunday morning...

.early this morning...south gales to 40 knots. freezing spray.
snow showers. waves 10 to 14 feet occasionally to 18 feet. 
.today...southwest gales to 35 knots becoming west gales to
45 knots. snow showers in the morning, then snow showers likely
in the afternoon. freezing spray in the afternoon. waves
subsiding to 7 to 10 feet occasionally to 13 feet, then building
to 15 to 20 feet occasionally to 25 feet. 
.tonight...northwest gales to 45 knots. freezing spray. snow
showers. waves 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. waves subsiding to 2 to 4 feet, then building to
3 to 5 feet occasionally to 7 feet. 
.monday...southwest winds 15 to 25 knots backing south in the
afternoon. a chance of snow showers. waves subsiding to 2 to
4 feet. 
.monday night...south winds 15 to 25 knots veering southwest
after midnight. a chance of snow showers. waves building to 3 to
5 feet occasionally to 7 feet. 
.tuesday...northwest gales to 35 knots diminishing to 20 to
30 knots. waves building to 8 to 11 feet occasionally to 14 feet,
then subsiding to 2 to 4 feet. 
.wednesday...south winds 15 to 25 knots. waves subsiding to 1 to
3 feet, then building to 3 to 6 feet occasionally to 8 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 200900
glfls 
expires:202512202100;;905576

open lake forecast for lake superior
national weather service marquette mi
400 am 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 will track north of lake 
superior today. 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 on wednesday as the high shifts east.



lsz267-202100-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
400 am est sat dec 20 2025

...gale warning in effect through sunday morning...
...heavy freezing spray warning in effect from 4 pm est this
afternoon through sunday morning...

.early this morning...south gales to 40 knots. snow showers.
waves 6 to 9 feet occasionally to 11 feet. 
.today...south gales to 35 knots becoming west gales to 45 knots
by mid afternoon. snow showers in the morning, then snow showers
likely in the afternoon. waves building to 6 to 10 feet
occasionally to 13 feet. 
.tonight...west gales to 45 knots with a few storm force gusts to
50 knots possible becoming northwest gales to 45 knots by
midnight. freezing spray. snow showers. waves 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. waves subsiding to 2 to 4 feet, then building to
3 to 6 feet occasionally to 8 feet. 
.monday...southwest winds 15 to 25 knots backing south in the
afternoon. a chance of snow showers. waves 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 2 to 4 feet. 
.tuesday...northwest gales to 35 knots diminishing to 15 to
25 knots. waves building to 8 to 11 feet occasionally to 14 feet,
then subsiding to 2 to 4 feet. 
.wednesday...south winds 15 to 25 knots. a chance of rain
showers. waves subsiding to 1 to 3 feet, then building to 2 to
4 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 200900
glfls 
expires:202512202100;;905571

open lake forecast for lake superior
national weather service marquette mi
400 am 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 will track north of lake 
superior today. 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 on wednesday as the high shifts east.



lsz162-202100-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am est sat dec 20 2025 /300 am cst sat dec 20 2025/

...gale warning in effect through late tonight...
...heavy freezing spray warning in effect from 1 pm est /noon
cst/ this afternoon through sunday morning...

.early this morning...southwest winds 20 to 30 knots. snow
showers. waves 5 to 8 feet occasionally to 10 feet. 
.today...west gales to 45 knots. heavy freezing spray. a slight
chance of snow showers. waves building to 9 to 12 feet
occasionally to 15 feet. 
.tonight...northwest gales to 40 knots diminishing to 15 to
25 knots late. a slight chance of snow showers in the evening.
heavy freezing spray. waves subsiding to 2 to 4 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 calm to 2 feet. 
.sunday night...southwest winds 10 to 20 knots. a slight chance
of snow showers after midnight. waves calm to 2 feet. 
.monday...south winds 10 to 20 knots backing southeast in the
afternoon. a chance of snow showers. waves calm to 2 feet. 
.monday night...south winds 10 to 20 knots veering west after
midnight. a chance of snow showers. waves calm to 2 feet. 
.tuesday...west winds 10 to 20 knots becoming south 5 to
15 knots. waves building to 1 to 3 feet, then subsiding to calm
to 2 feet. 
.wednesday...south winds 5 to 15 knots. waves calm to 2 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 200900
glfls 
expires:202512202100;;905572

open lake forecast for lake superior
national weather service marquette mi
400 am 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 will track north of lake 
superior today. 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 on wednesday as the high shifts east.



lsz263-202100-
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 sat dec 20 2025

...gale warning in effect through late tonight...
...heavy freezing spray warning in effect from 1 pm est this
afternoon through sunday morning...

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

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 200900
glfls 
expires:202512202100;;905573

open lake forecast for lake superior
national weather service marquette mi
400 am 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 will track north of lake 
superior today. 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 on wednesday as the high shifts east.



lsz264-202100-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
400 am est sat dec 20 2025

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

.early this morning...south gales to 35 knots. snow showers.
waves 8 to 11 feet occasionally to 14 feet subsiding to 7 to
10 feet occasionally to 13 feet. 
.today...southwest gales to 35 knots becoming west gales to
45 knots. snow showers. freezing spray in the afternoon. waves
subsiding to 6 to 9 feet occasionally to 11 feet, then building
to 12 to 17 feet occasionally to 21 feet. 
.tonight...northwest gales to 45 knots diminishing to 20 to
30 knots late. heavy freezing spray. a chance of snow showers.
waves subsiding to 5 to 8 feet occasionally to 10 feet. 
.sunday...northwest winds 15 to 25 knots becoming west 10 to
20 knots. freezing spray in the morning. a slight chance of snow
showers in the morning. waves subsiding to 1 to 3 feet. 
.sunday night...west winds 10 to 20 knots backing southwest after
midnight. waves building to 2 to 4 feet. 
.monday...south winds 5 to 15 knots. waves subsiding to 1 to
3 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...northwest winds 20 to 30 knots diminishing to 15 to
25 knots. waves building to 4 to 7 feet occasionally to 9 feet,
then subsiding to calm to 2 feet. 
.wednesday...south winds 10 to 20 knots diminishing to 5 to
15 knots. waves building to 2 to 4 feet, then subsiding to calm
to 2 feet. 

note, wave height forecasts are for ice free areas.

$$