fzus63 kdtx 240833
glflh 
expires:202512241645;;128703

open lake forecast for lake huron
national weather service detroit/pontiac mi
333 am est wed dec 24 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...high pressure, 30.40 inches, will quickly fill in
across the great lakes this morning which will rapidly diminish
wind speeds and gusts. a secondary high pressure system, 30.50
inches, will then arrive near the james bay late thursday into
friday morning. lighter winds prevail through tomorrow as a
result.


lhz361-241645-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
333 am est wed dec 24 2025

.today...north winds 5 to 10 knots early in the morning becoming
light and variable...then becoming south 5 to 10 knots in the
afternoon. waves 2 to 4 feet subsiding to 2 feet or less in the
late morning and afternoon. 
.tonight...south winds 5 to 10 knots becoming west 10 to 15 knots
after midnight. waves 1 to 3 feet. 
.thursday...northwest winds 10 to 15 knots veering to the
northeast in the late morning and afternoon. waves 2 to 4 feet
subsiding to 1 to 3 feet early in the afternoon. 
.thursday night...east winds 10 to 15 knots increasing to 20 to
25 knots with gusts to around 30 knots. a chance of snow after
midnight. waves 2 to 4 feet building to 5 to 7 feet in the late
evening and overnight. waves occasionally around 10 feet. 
.friday...southeast winds 20 to 25 knots with gusts to around
30 knots decreasing to 10 to 15 knots. snow. waves 8 to 12 feet
subsiding to 5 to 7 feet late in the evening. waves occasionally
around 15 feet. 
.saturday...southeast winds 10 to 15 knots. a chance of rain by
midnight. waves 2 to 4 feet. 
.sunday...southeast winds 10 to 15 knots becoming southwest 15 to
20 knots with gusts to around 30 knots in the late morning and
early afternoon...then becoming west to 30 knots with gusts to
40 knot gales early in the evening increasing to 35 knot gales
with gusts to 45 knot gales by midnight. a chance of rain until
afternoon. snow likely. waves 4 to 6 feet building to 12 to
16 feet . waves occasionally around 20 feet. a gale warning may
be needed. 


$$

fzus63 kdtx 240833
glflh 
expires:202512241645;;128704

open lake forecast for lake huron
national weather service detroit/pontiac mi
333 am est wed dec 24 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...high pressure, 30.40 inches, will quickly fill in
across the great lakes this morning which will rapidly diminish
wind speeds and gusts. a secondary high pressure system, 30.50
inches, will then arrive near the james bay late thursday into
friday morning. lighter winds prevail through tomorrow as a
result.


lhz362-363-241645-
lake huron from presque isle light to sturgeon point mi beyond
5nm off shore-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
333 am est wed dec 24 2025

.today...north winds 10 to 15 knots decreasing to 5 to 10 knots
late in the morning...then becoming light and variable early in
the afternoon becoming south 10 to 15 knots late in the
afternoon. waves 6 to 9 feet subsiding to 1 to 3 feet. waves
occasionally around 12 feet. 
.tonight...southwest winds 10 to 15 knots veering to the west
early in the morning. waves 1 to 3 feet building to 2 to 4 feet
in the late evening and overnight. 
.thursday...north winds 15 to 20 knots veering to the northeast
early in the afternoon. waves 4 to 6 feet. 
.thursday night...east winds 15 to 20 knots increasing to 20 to
25 knots after midnight. a chance of snow after midnight. waves
5 to 7 feet. waves occasionally around 10 feet. 
.friday...southeast winds 20 to 25 knots with gusts to around
30 knots decreasing to 10 to 15 knots. snow. waves 8 to 12 feet
subsiding to 5 to 7 feet late in the evening. waves occasionally
around 15 feet. 
.saturday...east winds 5 to 10 knots becoming southeast 10 to
15 knots. a chance of rain by midnight. waves 2 to 4 feet. 
.sunday...southeast winds 10 to 15 knots becoming south 15 to
20 knots with gusts to around 30 knots in the late morning and
early afternoon...then becoming west to 30 knots with gusts to
40 knot gales early in the evening increasing to 40 knot gales
with gusts to 45 knot gales by midnight. a chance of rain. a
chance of snow until early evening...then snow likely by
midnight. waves 3 to 5 feet building to 14 to 18 feet. waves
occasionally around 23 feet. a gale warning may be needed. 


$$

fzus63 kdtx 240833
glflh 
expires:202512241645;;128705

open lake forecast for lake huron
national weather service detroit/pontiac mi
333 am est wed dec 24 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...high pressure, 30.40 inches, will quickly fill in
across the great lakes this morning which will rapidly diminish
wind speeds and gusts. a secondary high pressure system, 30.50
inches, will then arrive near the james bay late thursday into
friday morning. lighter winds prevail through tomorrow as a
result.


lhz462>464-241645-
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-
333 am est wed dec 24 2025

.today...northwest winds 10 to 15 knots becoming north 5 to
10 knots late in the morning...then becoming light and variable
early in the afternoon becoming south 5 to 10 knots late in the
afternoon. waves 6 to 9 feet subsiding to 2 to 4 feet in the
afternoon. waves occasionally around 12 feet. 
.tonight...south winds 10 to 15 knots becoming southwest 5 to
10 knots early in the morning. waves 1 to 3 feet. 
.thursday...north winds 15 to 20 knots. waves 4 to 6 feet. waves
occasionally around 8 feet. 
.thursday night...northeast winds 15 to 20 knots veering to the
east after midnight. waves 4 to 6 feet. waves occasionally around
8 feet. 
.friday...southeast winds 20 to 25 knots with gusts to around
30 knots becoming east 10 to 15 knots. snow likely in the
morning...then snow...rain and freezing rain late in the morning.
waves 6 to 9 feet subsiding to 2 to 4 feet late in the evening.
waves occasionally around 12 feet. 
.saturday...east winds 5 to 10 knots becoming southeast 10 to
15 knots . a chance of rain by midnight. waves 1 to 3 feet. 
.sunday...southeast winds 10 to 15 knots becoming south 15 to
20 knots with gusts to around 30 knots in the late morning and
early afternoon...then becoming west to 30 knots with gusts to
40 knot gales early in the evening increasing to 35 knot gales
with gusts to 45 knot gales by midnight. a chance of rain. a
chance of snow in the late morning and early afternoon...then
snow likely . waves 2 to 4 feet building to 12 to 16 feet. waves
occasionally around 20 feet. a gale warning may be needed. 


$$

fzus63 kmkx 240856
glflm 
expires:202512241615;;129595

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
256 am cst wed dec 24 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...

light and variable winds will continue early this morning as high
pressure around 30.5 inches moves east into the southern new 
england stats. a weak low pressure trough around 30.0 inches will 
cross lake michigan this evening, and then another high pressure 
system around 30.5 inches will bring a push of northerly winds 
down the lake early thursday morning. weak low pressure of 29.7 
inches will cross illinois and indiana on friday. there is a 
chance for gales sunday through monday as low deepens to 29.3 
inches as it crosses ontario and 29.1 inches over quebec.


lmz261-362-364-366-563-565-567-868-241615-
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-
256 am cst wed dec 24 2025

sheboygan wi to pentwater mi north...

.today...east winds 5 to 10 kt becoming south 10 to 20 kt from
late morning on. slight chance of snow this afternoon. waves 2 to
4 ft. 
.tonight...south winds 10 to 20 kt veering to north. patchy
drizzle in the evening. waves 2 to 4 ft. 
.thursday...north winds 10 to 20 kt becoming east. waves 4 to
6 ft occasionally to 8 ft. 
.thursday night...southeast winds to 30 kt. chance of snow, rain
and freezing rain overnight. waves 4 to 7 ft occasionally to 9 ft
building to 6 to 9 ft occasionally to 12 ft. 
.friday...southeast winds to 30 kt diminishing to 15 to 25 kt.
snow and rain with freezing rain likely in the morning, then
chance of snow in the afternoon. waves 6 to 9 ft occasionally to
12 ft subsiding to 4 to 6 ft occasionally to 8 ft. 
.friday night...east winds 10 to 15 kt becoming southeast 5 to
10 kt. waves 2 to 4 ft subsiding to 1 to 2 ft. 
.saturday...southeast winds 10 to 20 kt. waves 1 to 3 ft building
to 2 to 4 ft. 
.sunday...west gales to 35 kt increasing to gales to 40 kt.
chance of rain and snow. waves 8 to 11 ft occasionally to 14 ft
building to 10 to 14 ft occasionally to 18 ft.  

$$

fzus63 kmkx 240856
glflm 
expires:202512241615;;129596

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
256 am cst wed dec 24 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...

light and variable winds will continue early this morning as high
pressure around 30.5 inches moves east into the southern new 
england stats. a weak low pressure trough around 30.0 inches will 
cross lake michigan this evening, and then another high pressure 
system around 30.5 inches will bring a push of northerly winds 
down the lake early thursday morning. weak low pressure of 29.7 
inches will cross illinois and indiana on friday. there is a 
chance for gales sunday through monday as low deepens to 29.3 
inches as it crosses ontario and 29.1 inches over quebec.


lmz080-669-671-673-675-777-779-870-872-874-876-878-241615-
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-
256 am cst wed dec 24 2025

sheboygan wi to pentwater mi south...

.today...east winds 10 to 15 kt becoming southeast 10 to 20 kt.
waves 2 to 4 ft. 
.tonight...south winds 10 to 20 kt backing to north. areas of
drizzle in the evening. waves 2 to 4 ft. 
.thursday...north winds 15 to 25 kt becoming east 10 to 20 kt.
waves 4 to 6 ft occasionally to 8 ft. 
.thursday night...east winds to 30 kt becoming southeast. rain
likely with a chance of freezing rain overnight. waves 6 to 9 ft
occasionally to 12 ft. 
.friday...southeast winds to 30 kt becoming east 10 to 20 kt in
the afternoon. rain likely in the morning. waves 6 to 9 ft
occasionally to 12 ft subsiding to 4 to 6 ft occasionally to
8 ft. 
.friday night...northeast winds 5 to 10 kt becoming east. waves
2 to 4 ft subsiding to 1 to 2 ft. 
.saturday...southeast winds 10 to 20 kt. waves 2 to 4 ft. 
.sunday...northwest gales to 40 kt becoming west gales to 45 kt.
chance of snow. waves 10 to 14 ft occasionally to 18 ft building
to 14 to 18 ft occasionally to 23 ft.  

$$

fzus63 kmqt 240900
glfls 
expires:202512242100;;129926

open lake forecast for lake superior
national weather service marquette mi
400 am est wed dec 24 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 30.4 inch high pressure over the upper great lakes this morning 
moves over the lower great lakes this evening, followed by a weak 
30.1 inch trough. 30.4 inch ridging briefly builds back over lake 
superior on thursday as a 30.5 inch high transits ontario. low 
pressure of 29.6 inches moves east along the southern end of the 
great lakes basin on friday. a deepening low then lifts over the 
upper great lakes saturday night and sunday. by monday, a strong 
high pressure of at least 30.6 inches will have set up over the 
plains with the now 29.1 inch low moving to quebec, yielding a tight 
pressure gradient over the great lakes.



lsz162-242100-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am est wed dec 24 2025 /300 am cst wed dec 24 2025/

.early this morning...south winds 5 to 15 knots. a slight chance
of snow showers. waves calm to 2 feet. 
.today...south winds 5 to 15 knots becoming southwest 10 to
20 knots by late morning, then becoming west 5 to 15 knots by mid
afternoon. a slight chance of snow showers in the morning. waves
calm to 2 feet. 
.tonight...north winds 5 to 15 knots increasing to 10 to 20 knots
by midnight, then becoming northeast 15 to 25 knots late. waves
building to 2 to 4 feet. 
.thursday...northeast winds 15 to 25 knots veering east. a chance
of snow showers, possibly mixed with freezing rain in the
afternoon. waves building to 3 to 5 feet occasionally to 7 feet. 
.thursday night...southeast winds 15 to 25 knots. snow showers,
possibly mixed with sleet. waves building to 3 to 6 feet
occasionally to 8 feet. 
.friday...south winds 10 to 20 knots becoming southwest 5 to
15 knots in the afternoon. a chance of snow showers, possibly
mixed with rain in the morning. waves subsiding to calm to
2 feet. 
.friday night...southwest winds 5 to 15 knots backing south after
midnight. waves calm to 2 feet. 
.saturday...southeast winds 10 to 20 knots becoming west 20 to
30 knots. a chance of rain showers. a chance of snow showers.
waves building to 4 to 7 feet occasionally to 9 feet. 
.sunday...west gales to 40 knots veering northwest. heavy
freezing spray. a chance of snow showers. waves building to 8 to
11 feet occasionally to 14 feet, then subsiding to 4 to 7 feet
occasionally to 9 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 240900
glfls 
expires:202512242100;;129927

open lake forecast for lake superior
national weather service marquette mi
400 am est wed dec 24 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 30.4 inch high pressure over the upper great lakes this morning 
moves over the lower great lakes this evening, followed by a weak 
30.1 inch trough. 30.4 inch ridging briefly builds back over lake 
superior on thursday as a 30.5 inch high transits ontario. low 
pressure of 29.6 inches moves east along the southern end of the 
great lakes basin on friday. a deepening low then lifts over the 
upper great lakes saturday night and sunday. by monday, a strong 
high pressure of at least 30.6 inches will have set up over the 
plains with the now 29.1 inch low moving to quebec, yielding a tight 
pressure gradient over the great lakes.



lsz263-242100-
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 wed dec 24 2025

.early this morning...southeast winds 5 to 15 knots. waves calm
to 2 feet. 
.today...south winds 5 to 15 knots veering west by mid afternoon.
a slight chance of snow showers in the morning. waves building to
1 to 3 feet. 
.tonight...north winds 10 to 20 knots veering northeast late.
waves building to 3 to 5 feet occasionally to 7 feet. 
.thursday...northeast winds 10 to 20 knots veering east by late
morning, then increasing to 15 to 25 knots by mid afternoon. a
slight chance of snow showers in the afternoon. waves subsiding
to 2 to 4 feet, then building to 3 to 5 feet occasionally to
7 feet. 
.thursday night...southeast winds 20 to 30 knots. snow showers.
waves building to 7 to 10 feet occasionally to 13 feet. 
.friday...south winds 20 to 30 knots becoming southwest 5 to
15 knots in the afternoon. a chance of rain showers in the
morning. a chance of snow showers. waves subsiding to 2 to
4 feet. 
.friday night...southwest winds 5 to 15 knots backing south after
midnight. waves subsiding to calm to 2 feet. 
.saturday...south winds 10 to 20 knots becoming west 20 to
30 knots. a chance of rain showers, possibly mixed with snow.
waves building to 8 to 11 feet occasionally to 14 feet. 
.sunday...west gales to 45 knots becoming northwest storm force
winds to 50 knots. heavy freezing spray. a chance of snow
showers. waves building to 12 to 17 feet occasionally to 21 feet,
then subsiding to 9 to 12 feet occasionally to 15 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 240900
glfls 
expires:202512242100;;129928

open lake forecast for lake superior
national weather service marquette mi
400 am est wed dec 24 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 30.4 inch high pressure over the upper great lakes this morning 
moves over the lower great lakes this evening, followed by a weak 
30.1 inch trough. 30.4 inch ridging briefly builds back over lake 
superior on thursday as a 30.5 inch high transits ontario. low 
pressure of 29.6 inches moves east along the southern end of the 
great lakes basin on friday. a deepening low then lifts over the 
upper great lakes saturday night and sunday. by monday, a strong 
high pressure of at least 30.6 inches will have set up over the 
plains with the now 29.1 inch low moving to quebec, yielding a tight 
pressure gradient over the great lakes.



lsz264-242100-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
400 am est wed dec 24 2025

...gale watch in effect from late thursday night through friday
afternoon...

.early this morning...southeast winds less than 10 knots. waves
calm to 2 feet. 
.today...south winds 5 to 15 knots veering west by mid afternoon.
a slight chance of snow showers. waves building to 1 to 3 feet. 
.tonight...northwest winds 10 to 20 knots becoming north 15 to
25 knots by midnight. freezing spray after midnight. waves
building to 3 to 6 feet occasionally to 8 feet. 
.thursday...northeast winds 10 to 20 knots veering east by late
morning, then increasing to 15 to 25 knots by mid afternoon.
freezing spray in the morning. a slight chance of snow showers in
the afternoon. waves subsiding to 2 to 4 feet. 
.thursday night...southeast gales to 40 knots. snow showers.
waves building to 9 to 12 feet occasionally to 15 feet. 
.friday...south gales to 35 knots diminishing to 15 to 25 knots
in the afternoon. snow showers likely in the morning. waves
building to 10 to 14 feet occasionally to 18 feet, then subsiding
to 3 to 6 feet occasionally to 8 feet. 
.friday night...south winds 5 to 15 knots. waves subsiding to
2 to 4 feet. 
.saturday...south winds 15 to 25 knots increasing to 20 to
30 knots. a chance of rain showers, possibly mixed with snow.
waves building to 8 to 11 feet occasionally to 14 feet. 
.sunday...west gales to 45 knots becoming northwest storm force
winds to 55 knots. heavy freezing spray. a chance of snow
showers. waves building to 12 to 17 feet occasionally to 21 feet.

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 240900
glfls 
expires:202512242100;;129929

open lake forecast for lake superior
national weather service marquette mi
400 am est wed dec 24 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 30.4 inch high pressure over the upper great lakes this morning 
moves over the lower great lakes this evening, followed by a weak 
30.1 inch trough. 30.4 inch ridging briefly builds back over lake 
superior on thursday as a 30.5 inch high transits ontario. low 
pressure of 29.6 inches moves east along the southern end of the 
great lakes basin on friday. a deepening low then lifts over the 
upper great lakes saturday night and sunday. by monday, a strong 
high pressure of at least 30.6 inches will have set up over the 
plains with the now 29.1 inch low moving to quebec, yielding a tight 
pressure gradient over the great lakes.



lsz265-242100-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
400 am est wed dec 24 2025

.early this morning...southwest winds 5 to 15 knots. waves 1 to
3 feet. 
.today...south winds 5 to 15 knots increasing to 10 to 20 knots
by late morning, then veering southwest by mid afternoon. a
slight chance of snow showers in the morning. waves subsiding to
calm to 2 feet, then building to 1 to 3 feet. 
.tonight...west winds 15 to 25 knots veering north by midnight,
then increasing to 20 to 30 knots late. waves building to 3 to
6 feet occasionally to 8 feet. 
.thursday...northeast winds 15 to 25 knots veering east by late
morning, then increasing to 20 to 30 knots by mid afternoon.
waves building to 4 to 7 feet occasionally to 9 feet, then
subsiding to 2 to 4 feet. 
.thursday night...southeast gales to 40 knots. snow showers.
waves building to 7 to 10 feet occasionally to 13 feet. 
.friday...south gales to 35 knots diminishing to 15 to 25 knots
in the afternoon. snow showers likely in the morning, then a
chance of snow showers in the afternoon. waves subsiding to 2 to
4 feet. 
.friday night...south winds 10 to 20 knots. waves subsiding to
calm to 2 feet. 
.saturday...south winds 15 to 25 knots increasing to 20 to
30 knots. a chance of rain showers. a chance of snow showers.
waves building to 7 to 10 feet occasionally to 13 feet. 
.sunday...west storm force winds to 50 knots becoming northwest
storm force winds to 55 knots. heavy freezing spray. snow showers
likely. waves building to 15 to 20 feet occasionally to 25 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 240900
glfls 
expires:202512242100;;129930

open lake forecast for lake superior
national weather service marquette mi
400 am est wed dec 24 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 30.4 inch high pressure over the upper great lakes this morning 
moves over the lower great lakes this evening, followed by a weak 
30.1 inch trough. 30.4 inch ridging briefly builds back over lake 
superior on thursday as a 30.5 inch high transits ontario. low 
pressure of 29.6 inches moves east along the southern end of the 
great lakes basin on friday. a deepening low then lifts over the 
upper great lakes saturday night and sunday. by monday, a strong 
high pressure of at least 30.6 inches will have set up over the 
plains with the now 29.1 inch low moving to quebec, yielding a tight 
pressure gradient over the great lakes.



lsz266-242100-
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 wed dec 24 2025

...gale watch in effect from late thursday night through friday
afternoon...

.early this morning...northeast winds 5 to 15 knots. waves 3 to
5 feet occasionally to 7 feet subsiding to 2 to 4 feet. 
.today...south winds 5 to 15 knots increasing to 15 to 25 knots
by late morning, then veering southwest by mid afternoon. a
slight chance of snow showers. waves subsiding to 1 to 3 feet,
then building to 3 to 5 feet occasionally to 7 feet. 
.tonight...west winds 10 to 20 knots becoming north 15 to
25 knots by midnight, then increasing to 20 to 30 knots late.
freezing spray after midnight. waves subsiding to 2 to 4 feet,
then building to 5 to 8 feet occasionally to 10 feet. 
.thursday...northeast winds 20 to 30 knots diminishing to 15 to
25 knots by late morning, then veering east by mid afternoon.
freezing spray in the morning. waves subsiding to 2 to 4 feet. 
.thursday night...southeast gales to 40 knots. a chance of snow
showers in the evening, then snow showers after midnight. waves
building to 9 to 12 feet occasionally to 15 feet. 
.friday...south gales to 40 knots diminishing to 20 to 30 knots
in the afternoon. snow showers in the morning, then a chance of
snow showers in the afternoon. waves building to 10 to 14 feet
occasionally to 18 feet, then subsiding to 4 to 7 feet
occasionally to 9 feet. 
.friday night...south winds 10 to 20 knots. waves subsiding to
2 to 4 feet. 
.saturday...south winds 15 to 25 knots increasing to 20 to
30 knots. a chance of rain showers, possibly mixed with snow.
waves building to 7 to 10 feet occasionally to 13 feet. 
.sunday...west storm force winds to 55 knots veering northwest.
heavy freezing spray. snow showers. waves building to 17 to
22 feet occasionally to 28 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 240900
glfls 
expires:202512242100;;129931

open lake forecast for lake superior
national weather service marquette mi
400 am est wed dec 24 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 30.4 inch high pressure over the upper great lakes this morning 
moves over the lower great lakes this evening, followed by a weak 
30.1 inch trough. 30.4 inch ridging briefly builds back over lake 
superior on thursday as a 30.5 inch high transits ontario. low 
pressure of 29.6 inches moves east along the southern end of the 
great lakes basin on friday. a deepening low then lifts over the 
upper great lakes saturday night and sunday. by monday, a strong 
high pressure of at least 30.6 inches will have set up over the 
plains with the now 29.1 inch low moving to quebec, yielding a tight 
pressure gradient over the great lakes.



lsz267-242100-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
400 am est wed dec 24 2025

...gale watch in effect from late thursday night through friday
afternoon...

.early this morning...northeast winds 5 to 15 knots. waves 3 to
5 feet occasionally to 7 feet subsiding to 2 to 4 feet. 
.today...southeast winds 5 to 15 knots becoming south 15 to
25 knots by late morning, then veering southwest by mid
afternoon. a slight chance of snow showers. waves subsiding to
calm to 2 feet, then building to 2 to 4 feet. 
.tonight...west winds 15 to 25 knots veering northwest by
midnight, then becoming north 20 to 30 knots late. waves building
to 4 to 7 feet occasionally to 9 feet. 
.thursday...northeast winds 15 to 25 knots diminishing to 10 to
20 knots by late morning, then veering east by mid afternoon.
freezing spray in the morning. waves subsiding to 1 to 3 feet. 
.thursday night...southeast winds 20 to 30 knots increasing to
gales to 35 knots after midnight. a chance of snow showers in the
evening, then snow showers after midnight. freezing spray after
midnight. waves building to 6 to 9 feet occasionally to 11 feet. 
.friday...southeast gales to 35 knots diminishing to 20 to
30 knots in the afternoon. snow showers. waves subsiding to 3 to
6 feet occasionally to 8 feet. 
.friday night...south winds 15 to 25 knots. waves subsiding to
2 to 4 feet. 
.saturday...southeast winds 20 to 30 knots veering south. a
chance of rain showers. a chance of snow showers. rain showers
likely. waves building to 5 to 8 feet occasionally to 10 feet. 
.sunday...west gales to 45 knots becoming northwest storm force
winds to 50 knots. heavy freezing spray. snow showers. waves
building to 17 to 22 feet occasionally to 28 feet. 

note, wave height forecasts are for ice free areas.

$$