fzus63 kdtx 130827
glflh 
expires:202512131630;;496716

open lake forecast for lake huron
national weather service detroit/pontiac mi
327 am est sat dec 13 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...an arctic cold front will clear the central great
lakes this morning. strong northerly flow follows for the rest of
the weekend with bitter cold air leading to snow squalls and
freezing spray over lake huron.


lhz361-362-131630-
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-
327 am est sat dec 13 2025

.today...west winds around 25 knots. a chance of snow showers. 
freezing spray. waves 6 to 9 feet. waves occasionally around 12 
feet. 
.tonight...west winds 20 to 25 knots. a chance of snow showers.
freezing spray. waves 6 to 9 feet. waves occasionally around
12 feet. 
.sunday...northwest winds 20 to 25 knots decreasing to 15 to
20 knots in the late morning and afternoon. freezing spray in the
morning. waves 8 to 12 feet. waves occasionally around 15 feet. 
.sunday night...northwest winds 15 to 20 knots decreasing to
10 to 15 knots in the late evening and early morning...then
becoming southwest 15 to 20 knots after midnight. a chance of
snow showers after midnight. waves 4 to 6 feet. 
.monday...southwest winds 20 to 25 knots with gusts to around
30 knots becoming west 15 to 20 knots late in the afternoon...
then decreasing to 10 to 15 knots late in the evening. snow
showers in the morning...then a chance of snow showers late in
the morning. waves 10 to 14 feet subsiding to 4 to 6 feet late in
the evening. waves occasionally around 18 feet. 
.tuesday...west winds 10 to 15 knots becoming southwest 15 to
20 knots in the late morning and early afternoon...then becoming
south to 30 knots with gusts to 35 knot gales early in the
evening becoming southwest 20 to 25 knots with gusts to around
30 knots in the late evening and early morning. waves 1 to 3 feet
building to 12 to 16 feet. waves occasionally around 20 feet. 
.wednesday...southwest winds 20 to 25 knots becoming west 15 to
20 knots until early evening...then becoming south 20 to 25 knots
with gusts to around 30 knots in the late evening and early
morning. a chance of rain in the late evening and early morning.
waves 10 to 14 feet subsiding to 5 to 7 feet until early
evening...then building to 8 to 12 feet in the late evening and
early morning. waves occasionally around 18 feet. 


$$

fzus63 kdtx 130827
glflh 
expires:202512131630;;496717

open lake forecast for lake huron
national weather service detroit/pontiac mi
327 am est sat dec 13 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...an arctic cold front will clear the central great
lakes this morning. strong northerly flow follows for the rest of
the weekend with bitter cold air leading to snow squalls and
freezing spray over lake huron.


lhz363-462>464-131630-
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-
327 am est sat dec 13 2025

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


$$

fzus63 kmkx 130834
glflm 
expires:202512131630;;496928

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
234 am cst sat dec 13 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...

brisk northwest winds and heavy freezing spray will continue today
into sunday morning in the wake of an arctic front. the brisk
winds are due to low pressure tracking from ontario into quebec, 
and arctic high pressure around 30.8 inches tracking from the 
northern high plains to iowa through sunday morning. 

winds will gradually ease sunday afternoon and evening as the 
arctic high pressure moves across illinois into the ohio valley. 
but as the high continues to move away, brisk southwest winds, 
possibly reaching gale force, develops for late sunday night into 
monday morning. much lighter winds will then return late monday
into monday night.  



lmz261-362-364-366-563-565-567-868-131630-
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-
234 am cst sat dec 13 2025

sheboygan wi to pentwater mi north...

...heavy freezing spray warning in effect through sunday
morning...

.today...northwest winds to 30 kt. freezing spray. scattered snow
showers and slight chance of light freezing rain. waves 6 to 9 ft
occasionally to 12 ft subsiding to 5 to 8 ft occasionally to
10 ft. 
.tonight...northwest winds to 30 kt. freezing spray. scattered
snow showers and slight chance of light freezing rain in the
evening, then scattered snow showers overnight. waves 7 to 10 ft
occasionally to 13 ft. 
.sunday...northwest winds to 30 kt diminishing to 10 to 20 kt.
freezing spray in the morning. waves 7 to 10 ft occasionally to
13 ft subsiding to 4 to 6 ft occasionally to 8 ft. 
.sunday night...west winds 10 to 20 kt becoming southwest gales
to 35 kt overnight. freezing spray overnight. scattered snow
showers overnight. waves 2 to 4 ft building to 8 to 11 ft
occasionally to 14 ft. 
.monday...southwest gales to 40 kt becoming west to 30 kt in the
afternoon. freezing spray in the morning. chance of snow in the
morning. waves 12 to 16 ft occasionally to 21 ft. 
.monday night...northwest winds 10 to 20 kt becoming west 5 to
10 kt. waves 5 to 8 ft occasionally to 10 ft subsiding to 2 to
4 ft. 
.tuesday...southwest winds to 30 kt increasing to gales to 40 kt.
waves 4 to 6 ft occasionally to 8 ft building to 8 to 11 ft
occasionally to 14 ft. 
.wednesday...west winds 15 to 25 kt becoming southwest 10 to
20 kt. waves 4 to 7 ft occasionally to 9 ft.  

$$

fzus63 kmkx 130834
glflm 
expires:202512131630;;496929

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
234 am cst sat dec 13 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...

brisk northwest winds and heavy freezing spray will continue today
into sunday morning in the wake of an arctic front. the brisk
winds are due to low pressure tracking from ontario into quebec, 
and arctic high pressure around 30.8 inches tracking from the 
northern high plains to iowa through sunday morning. 

winds will gradually ease sunday afternoon and evening as the 
arctic high pressure moves across illinois into the ohio valley. 
but as the high continues to move away, brisk southwest winds, 
possibly reaching gale force, develops for late sunday night into 
monday morning. much lighter winds will then return late monday
into monday night.  



lmz080-669-671-673-675-777-779-870-872-874-876-878-131630-
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-
234 am cst sat dec 13 2025

sheboygan wi to pentwater mi south...

...heavy freezing spray warning in effect through sunday
morning...

.today...northwest winds to 30 kt. freezing spray. scattered snow
showers and light freezing rain likely this morning, then
scattered snow showers and slight chance of light freezing rain
this afternoon. waves 7 to 10 ft occasionally to 13 ft. 
.tonight...northwest winds to 30 kt. heavy freezing spray.
scattered snow showers and slight chance of light freezing rain
in the evening, then scattered snow showers overnight. waves 7 to
10 ft occasionally to 13 ft. 
.sunday...northwest winds to 30 kt diminishing to 10 to 20 kt.
scattered snow showers in the morning. freezing spray. waves 8 to
11 ft occasionally to 14 ft subsiding to 6 to 9 ft occasionally
to 12 ft. 
.sunday night...west winds 10 to 20 kt becoming southwest gales
to 35 kt overnight. freezing spray overnight. waves 4 to 6 ft
occasionally to 8 ft building to 8 to 11 ft occasionally to
14 ft. 
.monday...southwest gales to 40 kt becoming west gales to 35 kt.
freezing spray in the morning. waves 12 to 16 ft occasionally to
21 ft. 
.monday night...west winds 15 to 25 kt diminishing to 10 to
15 kt. waves 6 to 9 ft occasionally to 12 ft subsiding to 3 to
5 ft. 
.tuesday...southwest winds 15 to 25 kt increasing to 30 kt. waves
4 to 6 ft occasionally to 8 ft building to 8 to 11 ft
occasionally to 14 ft. 
.wednesday...west winds 15 to 25 kt becoming southwest. waves
6 to 9 ft occasionally to 12 ft.  

$$

fzus63 kmqt 130901
glfls 
expires:202512132100;;498238

open lake forecast for lake superior
national weather service marquette mi
400 am est sat dec 13 2025

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

a 29.6 inch low over northern ontario this morning weakens to 29.7 
inches as it moves into northern quebec by this afternoon. 
meanwhile, a 30.7 inch high spreads throughout central canada and 
into the northern plains today, with ridging building to 30.5 inches 
over the western lake by sunday morning as the high moves into iowa. 
a 29.9 inch trough moves through the lake monday morning as the high 
settles into the southeastern u.s. a 30.1 inch ridge then moves 
through lake superior monday night followed by a trough of at least 
29.3 inches tuesday night. weak ridging of 29.9 inches returns over 
lake superior on wednesday before a 29.0 inch clipper low moves 
through on thursday.



lsz162-132100-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am est sat dec 13 2025 /300 am cst sat dec 13 2025/

...heavy freezing spray warning in effect through late tonight...

.early this morning...northwest winds 20 to 30 knots. heavy
freezing spray. isolated snow showers. waves 5 to 8 feet
occasionally to 10 feet. 
.today...northwest winds 20 to 30 knots. heavy freezing spray in
the morning. isolated snow showers. waves subsiding to 4 to
7 feet occasionally to 9 feet. 
.tonight...northwest winds 20 to 30 knots diminishing to 15 to
25 knots late. isolated snow showers. waves subsiding to 2 to
4 feet. 
.sunday...northwest winds 10 to 20 knots backing west by late
morning, then becoming southwest 15 to 25 knots by mid afternoon.
a slight chance of snow showers in the morning. waves subsiding
to calm to 2 feet, then building to 3 to 5 feet occasionally to
7 feet. 
.sunday night...southwest gales to 35 knots. freezing spray after
midnight. a slight chance of snow showers after midnight. waves
building to 5 to 9 feet occasionally to 11 feet. 
.monday...west winds 15 to 25 knots becoming northwest 5 to
15 knots in the afternoon. waves subsiding to calm to 2 feet. 
.monday night...northwest winds 5 to 15 knots becoming southwest
10 to 20 knots after midnight. waves calm to 2 feet. 
.tuesday...southwest gales to 35 knots veering west. waves
building to 6 to 9 feet occasionally to 11 feet, then subsiding
to 2 to 4 feet. 
.wednesday...west winds 10 to 20 knots becoming south gales to
35 knots. rain and snow showers likely. waves subsiding to calm
to 2 feet, then building to 6 to 9 feet occasionally to 11 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 130901
glfls 
expires:202512132100;;498239

open lake forecast for lake superior
national weather service marquette mi
400 am est sat dec 13 2025

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

a 29.6 inch low over northern ontario this morning weakens to 29.7 
inches as it moves into northern quebec by this afternoon. 
meanwhile, a 30.7 inch high spreads throughout central canada and 
into the northern plains today, with ridging building to 30.5 inches 
over the western lake by sunday morning as the high moves into iowa. 
a 29.9 inch trough moves through the lake monday morning as the high 
settles into the southeastern u.s. a 30.1 inch ridge then moves 
through lake superior monday night followed by a trough of at least 
29.3 inches tuesday night. weak ridging of 29.9 inches returns over 
lake superior on wednesday before a 29.0 inch clipper low moves 
through on thursday.



lsz263-132100-
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 13 2025

...heavy freezing spray warning in effect through sunday
morning...

.early this morning...northwest winds 20 to 30 knots. heavy
freezing spray. numerous snow showers. waves 7 to 10 feet
occasionally to 13 feet. 
.today...northwest winds 20 to 30 knots. heavy freezing spray.
numerous snow showers. waves subsiding to 5 to 8 feet
occasionally to 10 feet. 
.tonight...northwest winds 20 to 30 knots veering north by
midnight, then becoming northwest 15 to 25 knots late. heavy
freezing spray. scattered snow showers. waves building to 6 to
9 feet occasionally to 11 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet. 
.sunday...northwest winds 10 to 20 knots becoming west 5 to
15 knots by late morning, then becoming southwest 15 to 25 knots
by mid afternoon. a chance of snow showers. waves subsiding to
2 to 4 feet. 
.sunday night...southwest gales to 35 knots. freezing spray. a
chance of snow showers. waves building to 7 to 10 feet
occasionally to 13 feet. 
.monday...west winds 20 to 30 knots becoming northwest 10 to
20 knots in the afternoon. freezing spray in the morning. waves
subsiding to 1 to 3 feet. 
.monday night...northwest winds 5 to 15 knots becoming southwest
10 to 20 knots after midnight. waves subsiding to calm to 2 feet.
.tuesday...southwest gales to 40 knots veering west. waves
building to 8 to 11 feet occasionally to 14 feet, then subsiding
to 4 to 7 feet occasionally to 9 feet. 
.wednesday...west winds 10 to 20 knots becoming south gales to
40 knots. rain and snow showers likely. waves subsiding to 1 to
3 feet, then building to 7 to 10 feet occasionally to 13 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 130901
glfls 
expires:202512132100;;498240

open lake forecast for lake superior
national weather service marquette mi
400 am est sat dec 13 2025

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

a 29.6 inch low over northern ontario this morning weakens to 29.7 
inches as it moves into northern quebec by this afternoon. 
meanwhile, a 30.7 inch high spreads throughout central canada and 
into the northern plains today, with ridging building to 30.5 inches 
over the western lake by sunday morning as the high moves into iowa. 
a 29.9 inch trough moves through the lake monday morning as the high 
settles into the southeastern u.s. a 30.1 inch ridge then moves 
through lake superior monday night followed by a trough of at least 
29.3 inches tuesday night. weak ridging of 29.9 inches returns over 
lake superior on wednesday before a 29.0 inch clipper low moves 
through on thursday.



lsz264-132100-
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 13 2025

...gale warning in effect through sunday morning...
...heavy freezing spray warning in effect through sunday
morning...

.early this morning...northwest winds 20 to 30 knots. heavy
freezing spray. numerous snow showers. waves 6 to 9 feet
occasionally to 11 feet. 
.today...northwest winds 20 to 30 knots. heavy freezing spray.
numerous snow showers. waves subsiding to 5 to 8 feet
occasionally to 10 feet, then building to 6 to 9 feet
occasionally to 11 feet. 
.tonight...northwest gales to 35 knots veering north by midnight,
then diminishing to 20 to 30 knots late. heavy freezing spray.
scattered snow showers. waves building to 7 to 11 feet
occasionally to 14 feet. 
.sunday...northwest winds 15 to 25 knots diminishing to 10 to
20 knots by late morning, then backing west by mid afternoon.
freezing spray in the morning. a slight chance of snow showers in
the morning. waves subsiding to 1 to 3 feet, then building to
2 to 4 feet. 
.sunday night...southwest winds 20 to 30 knots increasing to
gales to 35 knots after midnight. freezing spray. a chance of
snow showers after midnight. waves building to 8 to 11 feet
occasionally to 14 feet. 
.monday...west winds 20 to 30 knots becoming northwest 15 to
25 knots in the afternoon. freezing spray. waves subsiding to
3 to 5 feet occasionally to 7 feet. 
.monday night...north winds 10 to 20 knots backing southwest
after midnight. waves subsiding to calm to 2 feet. 
.tuesday...southwest gales to 40 knots veering west. waves
building to 9 to 12 feet occasionally to 15 feet, then subsiding
to 7 to 10 feet occasionally to 13 feet. 
.wednesday...northwest winds 20 to 30 knots becoming south gales
to 40 knots. rain and snow showers likely. waves subsiding to
2 to 4 feet, then building to 9 to 12 feet occasionally to
15 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 130901
glfls 
expires:202512132100;;498241

open lake forecast for lake superior
national weather service marquette mi
400 am est sat dec 13 2025

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

a 29.6 inch low over northern ontario this morning weakens to 29.7 
inches as it moves into northern quebec by this afternoon. 
meanwhile, a 30.7 inch high spreads throughout central canada and 
into the northern plains today, with ridging building to 30.5 inches 
over the western lake by sunday morning as the high moves into iowa. 
a 29.9 inch trough moves through the lake monday morning as the high 
settles into the southeastern u.s. a 30.1 inch ridge then moves 
through lake superior monday night followed by a trough of at least 
29.3 inches tuesday night. weak ridging of 29.9 inches returns over 
lake superior on wednesday before a 29.0 inch clipper low moves 
through on thursday.



lsz265-132100-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
400 am est sat dec 13 2025

...gale warning in effect through sunday morning...
...heavy freezing spray warning in effect through sunday
morning...

.early this morning...northwest gales to 35 knots. heavy freezing
spray. numerous snow showers. waves 5 to 9 feet occasionally to
11 feet. 
.today...northwest gales to 35 knots. heavy freezing spray.
numerous snow showers. waves subsiding to 5 to 8 feet
occasionally to 10 feet. 
.tonight...northwest gales to 40 knots. freezing spray. numerous
snow showers in the evening. scattered snow showers after
midnight. waves building to 8 to 12 feet occasionally to 15 feet.
.sunday...northwest winds 20 to 30 knots becoming west 15 to
25 knots by mid afternoon. freezing spray in the morning. a
chance of snow showers in the morning. waves subsiding to 2 to
4 feet. 
.sunday night...southwest winds 15 to 25 knots increasing to
20 to 30 knots after midnight. a chance of snow showers after
midnight. waves subsiding to 1 to 3 feet, then building to 3 to
6 feet occasionally to 8 feet. 
.monday...west winds 20 to 30 knots veering northwest in the
afternoon. freezing spray in the morning. a chance of snow
showers. waves subsiding to 2 to 4 feet. 
.monday night...northwest winds 10 to 20 knots backing southwest
after midnight. waves subsiding to calm to 2 feet. 
.tuesday...south winds 20 to 30 knots becoming west gales to
35 knots. waves building to 4 to 8 feet occasionally to 10 feet. 
.wednesday...west winds 20 to 30 knots becoming south gales to
45 knots. rain and snow showers likely. waves subsiding to 1 to
3 feet, then building to 7 to 10 feet occasionally to 13 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 130901
glfls 
expires:202512132100;;498242

open lake forecast for lake superior
national weather service marquette mi
400 am est sat dec 13 2025

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

a 29.6 inch low over northern ontario this morning weakens to 29.7 
inches as it moves into northern quebec by this afternoon. 
meanwhile, a 30.7 inch high spreads throughout central canada and 
into the northern plains today, with ridging building to 30.5 inches 
over the western lake by sunday morning as the high moves into iowa. 
a 29.9 inch trough moves through the lake monday morning as the high 
settles into the southeastern u.s. a 30.1 inch ridge then moves 
through lake superior monday night followed by a trough of at least 
29.3 inches tuesday night. weak ridging of 29.9 inches returns over 
lake superior on wednesday before a 29.0 inch clipper low moves 
through on thursday.



lsz266-132100-
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 13 2025

...gale warning in effect through sunday morning...
...heavy freezing spray warning in effect through sunday
morning...

.early this morning...northwest gales to 35 knots. heavy freezing
spray. numerous snow showers. waves 9 to 12 feet occasionally to
15 feet. 
.today...northwest gales to 40 knots. heavy freezing spray.
numerous snow showers. waves subsiding to 8 to 11 feet
occasionally to 14 feet. 
.tonight...northwest gales to 40 knots veering north by midnight.
freezing spray. snow showers. waves building to 11 to 15 feet
occasionally to 19 feet, then subsiding to 10 to 14 feet
occasionally to 18 feet. 
.sunday...north winds 20 to 30 knots becoming northwest 15 to
25 knots. freezing spray in the morning. a chance of snow
showers. waves subsiding to 3 to 6 feet occasionally to 8 feet. 
.sunday night...southwest winds 15 to 25 knots increasing to
20 to 30 knots after midnight. freezing spray after midnight.
snow showers likely after midnight. waves subsiding to 2 to
4 feet, then building to 6 to 9 feet occasionally to 11 feet. 
.monday...west winds 20 to 30 knots veering northwest in the
afternoon. freezing spray in the morning. a chance of snow
showers. waves building to 7 to 10 feet occasionally to 13 feet,
then subsiding to 4 to 7 feet occasionally to 9 feet. 
.monday night...northwest winds 10 to 20 knots backing southwest
after midnight. waves subsiding to 1 to 3 feet. 
.tuesday...south gales to 35 knots veering west. waves building
to 6 to 10 feet occasionally to 13 feet. 
.wednesday...northwest winds 20 to 30 knots becoming south gales
to 40 knots. rain and snow showers likely. waves subsiding to
3 to 5 feet occasionally to 7 feet, then building to 10 to
14 feet occasionally to 18 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 130901
glfls 
expires:202512132100;;498243

open lake forecast for lake superior
national weather service marquette mi
400 am est sat dec 13 2025

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

a 29.6 inch low over northern ontario this morning weakens to 29.7 
inches as it moves into northern quebec by this afternoon. 
meanwhile, a 30.7 inch high spreads throughout central canada and 
into the northern plains today, with ridging building to 30.5 inches 
over the western lake by sunday morning as the high moves into iowa. 
a 29.9 inch trough moves through the lake monday morning as the high 
settles into the southeastern u.s. a 30.1 inch ridge then moves 
through lake superior monday night followed by a trough of at least 
29.3 inches tuesday night. weak ridging of 29.9 inches returns over 
lake superior on wednesday before a 29.0 inch clipper low moves 
through on thursday.



lsz267-132100-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
400 am est sat dec 13 2025

...gale warning in effect through sunday morning...
...heavy freezing spray warning in effect through sunday
morning...

.early this morning...northwest gales to 35 knots. freezing
spray. numerous snow showers. waves 9 to 12 feet occasionally to
15 feet. 
.today...northwest gales to 35 knots. freezing spray. numerous
snow showers. waves subsiding to 7 to 10 feet occasionally to
13 feet, then building to 8 to 11 feet occasionally to 14 feet. 
.tonight...north gales to 35 knots diminishing to 20 to 30 knots
by midnight, then increasing to gales to 35 knots late. freezing
spray. snow showers in the evening. scattered snow showers after
midnight. waves building to 10 to 14 feet occasionally to
18 feet, then subsiding to 8 to 11 feet occasionally to 14 feet. 
.sunday...north gales to 35 knots diminishing to 20 to 30 knots
by late morning, then becoming northwest 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...west winds 10 to 20 knots becoming southwest
20 to 30 knots after midnight. a slight chance of snow showers in
the evening, then snow showers likely after midnight. freezing
spray after midnight. waves subsiding to 2 to 4 feet, then
building to 6 to 9 feet occasionally to 11 feet. 
.monday...southwest winds 20 to 30 knots veering west in the
afternoon. freezing spray in the morning. snow showers in the
morning, then a chance of snow showers in the afternoon. waves
building to 7 to 10 feet occasionally to 13 feet, then subsiding
to 5 to 8 feet occasionally to 10 feet. 
.monday night...northwest winds 10 to 20 knots backing southwest
after midnight. waves subsiding to 1 to 3 feet. 
.tuesday...south gales to 35 knots veering southwest. a chance of
snow showers and freezing drizzle. waves building to 9 to 12 feet
occasionally to 15 feet. 
.wednesday...northwest winds 20 to 30 knots becoming south gales
to 35 knots. rain and snow showers. waves subsiding to 3 to
5 feet occasionally to 7 feet, then building to 6 to 9 feet
occasionally to 11 feet. 

note, wave height forecasts are for ice free areas.

$$