fzus63 kdtx 150814
glflh 
expires:202512151615;;613666

open lake forecast for lake huron
national weather service detroit/pontiac mi
314 am est mon dec 15 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...arctic air remains overhead today while strong high
pressure, 30.80 inches, drifts from the plains into the ohio
valley. the next cold front arrives late monday bringing a period
of elevated southwesterly winds but the high will quickly fill
back in behind it overnight.


lhz361-151615-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
314 am est mon dec 15 2025

.today...southwest winds 20 to 25 knots becoming west 15 to
20 knots in the afternoon. snow showers in the morning. waves
4 to 6 feet. 
.tonight...west winds 10 to 15 knots decreasing to 5 to 10 knots
after midnight. waves 3 to 5 feet subsiding to 1 to 3 feet after
midnight. waves occasionally around 8 feet. 
.tuesday...south winds 10 to 15 knots increasing to 15 to
20 knots in the late morning and afternoon. waves 1 to 3 feet
building to 4 to 6 feet in the late morning and afternoon. waves
occasionally around 8 feet. 
.tuesday night...southwest winds 20 to 25 knots veering to the
west after midnight. gusts to 30 knots. waves 6 to 9 feet. waves
occasionally around 12 feet. 
.wednesday...west winds 20 to 25 knots with gusts to around
30 knots decreasing to 10 to 15 knots late in the morning...then
becoming south 20 to 25 knots with gusts to around 30 knots late
in the evening. a chance of rain late in the evening. waves 6 to
9 feet subsiding to 2 to 4 feet late in the afternoon...then
building to 8 to 12 feet late in the evening. waves occasionally
around 15 feet. 
.thursday...south winds 20 to 25 knots becoming southwest to
30 knots early in the evening...then becoming west at 35 knot
gales in the late evening and early morning. rain. a chance of
snow until early morning. a chance of rain in the late evening
and early morning. freezing spray in the late evening and early
morning. waves 12 to 16 feet. waves occasionally around 20 feet.
a gale warning may be needed. 
.friday...northwest winds 20 to 25 knots with gusts to around
30 knots decreasing to 10 to 15 knots until early evening...then
becoming south 15 to 20 knots in the late evening and early
morning. freezing spray early in the morning. a chance of until
early evening. snow likely in the late evening and early morning.
waves 10 to 14 feet subsiding to 6 to 9 feet in the late morning
and early afternoon...then subsiding to 2 to 4 feet early in the
evening building to 5 to 7 feet in the late evening and early
morning. waves occasionally around 18 feet. 


$$

fzus63 kdtx 150814
glflh 
expires:202512151615;;613667

open lake forecast for lake huron
national weather service detroit/pontiac mi
314 am est mon dec 15 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...arctic air remains overhead today while strong high
pressure, 30.80 inches, drifts from the plains into the ohio
valley. the next cold front arrives late monday bringing a period
of elevated southwesterly winds but the high will quickly fill
back in behind it overnight.


lhz362-363-462-151615-
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-
lake huron from port austin to harbor beach beyond 5nm off shore-
314 am est mon dec 15 2025

.today...southwest winds 20 to 25 knots increasing to 30 knots in
the late morning and early afternoon...then decreasing to 20 to
25 knots late in the afternoon. snow showers in the morning...
then a chance of snow showers in the afternoon. freezing spray in
the afternoon. waves 8 to 12 feet building to 10 to 14 feet in
the afternoon. waves occasionally around 18 feet. 
.tonight...southwest winds 15 to 20 knots becoming west 10 to
15 knots in the late evening and overnight. waves 6 to 9 feet
subsiding to 2 to 4 feet. waves occasionally around 12 feet. 
.tuesday...southwest winds 10 to 15 knots becoming south to
30 knots with gusts to 35 knot gales. waves 3 to 5 feet building
to 8 to 12 feet in the late morning and afternoon. waves
occasionally around 15 feet. 
.tuesday night...south at 35 knot gales becoming southwest to
30 knots in the late evening and overnight. waves 12 to 16 feet.
waves occasionally around 20 feet. a gale warning may be needed. 
.wednesday...west winds 20 to 25 knots with gusts to around
30 knots decreasing to 15 to 20 knots late in the morning...then
backing to the southwest late in the afternoon becoming south at
35 knot gales with gusts to 40 knot gales late in the evening.
waves 8 to 12 feet subsiding to 3 to 5 feet late in the
afternoon...then building to 10 to 14 feet late in the evening.
waves occasionally around 18 feet. 
.thursday...south at 35 knot gales becoming west at 40 knot gales
in the late evening and early morning. rain. a chance of snow
until early morning. freezing spray in the late evening and early
morning. waves 15 to 20 feet. waves occasionally around 25 feet. 
.friday...west at 35 knot gales with gusts to 40 knot gales
becoming northwest 20 to 25 knots with gusts to around 30 knots
in the late morning and early afternoon...then decreasing to
15 to 20 knots early in the evening becoming southwest 20 to
25 knots with gusts to around 30 knots in the late evening and
early morning. freezing spray until afternoon. freezing spray in
the late evening and early morning. a chance of snow in the late
evening and early morning. waves 14 to 18 feet subsiding to 8 to
12 feet until early morning. waves occasionally around 23 feet. 


$$

fzus63 kmkx 150902
glflm 
expires:202512151700;;615418

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
302 am cst mon dec 15 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...

strong high pressure of 30.7 inches over the ohio river valley
early this morning will slowly progress southeastward through the
first half of this week, gradually weakening and merging into the
atlantic ocean. with the proximity and strength of the high
pressure system this morning, southwesterly winds with gusts to
gale force are expected, and a gale warning remains in effect
through noon cst today for all open waters. these should be 
relatively weak (35 kt) gales at best. moderate freezing spray is
expected through this morning as well. winds veer due west and 
decelerate in a north to south manner this afternoon into tonight.

strong low pressure around 29.0 inches tracks eastward across
ontario canada on tuesday, working with the aforementioned high
pressure system to drive breezy southwesterly winds. a gale watch
is in effect for the northern third of the open waters tuesday 
afternoon through late tuesday night, where roughly 40 kt gales
are expected. winds are forecast to hold just shy of gale force
for the rest of the lake, though we will continue to monitor. a 
cold front extending south of the low crosses the lake late 
tuesday night, veering winds due west. winds and gusts subside 
behind the front.

another strong low pressure system is expected to track eastward 
along the usa / canada borderline mid week, likely crossing lake 
superior thursday and continuing east. strong south winds are 
expected across lake michigan wednesday night (gales likely over 
most of the lake), with the associated cold front crossing the 
lake late thursday morning. even stronger west to northwesterly 
gales are likely behind the front thursday afternoon into 
thursday night.

a brief lull in the winds is likely mid friday. a clipper system 
crossing southern canada may lead to a period of gusty southerly 
winds late friday into friday night. 


lmz261-362-364-563-151700-
lake michigan from seul choix point to rock island passage 5 nm
offshore to mid lake-
lake michigan south of a line from seul choix point to the
mackinac bridge and north of a line from charlevoix mi to south
fox island 5 nm offshore-
lake michigan from charlevoix to point betsie mi 5 nm offshore to
mid lake-
lake michigan from rock island passage to sturgeon bay wi-
302 am cst mon dec 15 2025

sturgeon bay wi to point betsie mi north...

...gale warning in effect until noon cst today...
...gale watch in effect from tuesday afternoon through late
tuesday night...

.today...southwest gales to 35 kt becoming west to 30 kt late
this morning, then diminishing to 15 to 25 kt early this
afternoon diminishing to 10 to 20 kt late. moderate freezing 
spray this morning. chance of snow this morning, then slight 
chance of snow this afternoon. waves 8 to 11 ft occasionally to 14
ft subsiding to 4 to 7 ft occasionally to 9 ft. 
.tonight...west winds 10 to 15 kt becoming southwest 10 to 20 kt.
waves 3 to 5 ft subsiding to 1 to 3 ft. 
.tuesday...southwest winds 15 to 25 kt increasing to gales to
40 kt. waves 3 to 5 ft building to 10 to 14 ft occasionally to
18 ft. 
.tuesday night...southwest gales to 40 kt becoming west to 30 kt
late. waves 10 to 14 ft occasionally to 18 ft subsiding to 8 to 
12 ft occasionally to 16 ft. 
.wednesday...northwest winds to 30 kt becoming southwest 10 to
20 kt in the afternoon. waves 4 to 7 ft occasionally to 9 ft
subsiding to 2 to 4 ft. 
.wednesday night...south gales to 40 kt increasing to gales to
45 kt. chance of rain. waves 8 to 12 ft occasionally to 16 ft
building to 14 to 18 ft occasionally to 23 ft. 
.thursday...south gales to 40 kt becoming west gales to 45 kt.
rain with snow likely. waves 14 to 18 ft occasionally to 23 ft
subsiding to 10 to 14 ft occasionally to 18 ft. 
.friday...northwest winds 15 to 25 kt becoming west. waves 4 to
7 ft occasionally to 9 ft subsiding to 3 to 5 ft.  

$$

fzus63 kmkx 150902
glflm 
expires:202512151700;;615419

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
302 am cst mon dec 15 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...

strong high pressure of 30.7 inches over the ohio river valley
early this morning will slowly progress southeastward through the
first half of this week, gradually weakening and merging into the
atlantic ocean. with the proximity and strength of the high
pressure system this morning, southwesterly winds with gusts to
gale force are expected, and a gale warning remains in effect
through noon cst today for all open waters. these should be 
relatively weak (35 kt) gales at best. moderate freezing spray is
expected through this morning as well. winds veer due west and 
decelerate in a north to south manner this afternoon into tonight.

strong low pressure around 29.0 inches tracks eastward across
ontario canada on tuesday, working with the aforementioned high
pressure system to drive breezy southwesterly winds. a gale watch
is in effect for the northern third of the open waters tuesday 
afternoon through late tuesday night, where roughly 40 kt gales
are expected. winds are forecast to hold just shy of gale force
for the rest of the lake, though we will continue to monitor. a 
cold front extending south of the low crosses the lake late 
tuesday night, veering winds due west. winds and gusts subside 
behind the front.

another strong low pressure system is expected to track eastward 
along the usa / canada borderline mid week, likely crossing lake 
superior thursday and continuing east. strong south winds are 
expected across lake michigan wednesday night (gales likely over 
most of the lake), with the associated cold front crossing the 
lake late thursday morning. even stronger west to northwesterly 
gales are likely behind the front thursday afternoon into 
thursday night.

a brief lull in the winds is likely mid friday. a clipper system 
crossing southern canada may lead to a period of gusty southerly 
winds late friday into friday night. 


lmz366-565-567-868-151700-
lake michigan from point betsie to manistee mi 5 nm offshore to
mid lake-
lake michigan from sturgeon bay to two rivers wi 5 nm offshore to
mid lake-
lake michigan from two rivers to sheboygan wi 5 nm offshore to
mid lake-
lake michigan from pentwater to manistee mi 5 nm offshore to mid
lake-
302 am cst mon dec 15 2025

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

...gale warning in effect until noon cst today...

.today...southwest gales to 35 kt diminishing to 30 kt late this
morning, then becoming west 15 to 25 kt early this afternoon
diminishing to 10 to 20 kt late. moderate freezing spray this 
morning. slight chance of snow this morning. waves 8 to 11 ft 
occasionally to 14 ft subsiding to 5 to 8 ft occasionally to 10 
ft. 
.tonight...west winds 10 to 15 kt becoming southwest. waves 4 to
6 ft occasionally to 8 ft subsiding to 1 to 3 ft. 
.tuesday...southwest winds 15 to 25 kt increasing to 30 kt. a few
gusts to gale force possible. waves 3 to 5 ft building to 10 to 
14 ft occasionally to 18 ft.
.tuesday night...southwest winds to 30 kt becoming west. waves 10
to 14 ft occasionally to 18 ft subsiding to 8 to 12 ft 
occasionally to 16 ft. 
.wednesday...west winds 10 to 20 kt becoming southwest. waves
5 to 8 ft occasionally to 10 ft subsiding to 2 to 4 ft. 
.wednesday night...south gales to 40 kt increasing to gales to
45 kt. chance of rain. waves 8 to 12 ft occasionally to 16 ft
building to 14 to 18 ft occasionally to 23 ft. 
.thursday...southwest gales to 40 kt becoming west gales to
45 kt. rain with a chance of snow. waves 14 to 18 ft occasionally
to 23 ft. 
.friday...northwest winds 10 to 20 kt backing to southwest to
30 kt. waves 6 to 9 ft occasionally to 12 ft subsiding to 4 to
7 ft occasionally to 9 ft.  

$$

fzus63 kmkx 150902
glflm 
expires:202512151700;;615420

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
302 am cst mon dec 15 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...

strong high pressure of 30.7 inches over the ohio river valley
early this morning will slowly progress southeastward through the
first half of this week, gradually weakening and merging into the
atlantic ocean. with the proximity and strength of the high
pressure system this morning, southwesterly winds with gusts to
gale force are expected, and a gale warning remains in effect
through noon cst today for all open waters. these should be 
relatively weak (35 kt) gales at best. moderate freezing spray is
expected through this morning as well. winds veer due west and 
decelerate in a north to south manner this afternoon into tonight.

strong low pressure around 29.0 inches tracks eastward across
ontario canada on tuesday, working with the aforementioned high
pressure system to drive breezy southwesterly winds. a gale watch
is in effect for the northern third of the open waters tuesday 
afternoon through late tuesday night, where roughly 40 kt gales
are expected. winds are forecast to hold just shy of gale force
for the rest of the lake, though we will continue to monitor. a 
cold front extending south of the low crosses the lake late 
tuesday night, veering winds due west. winds and gusts subside 
behind the front.

another strong low pressure system is expected to track eastward 
along the usa / canada borderline mid week, likely crossing lake 
superior thursday and continuing east. strong south winds are 
expected across lake michigan wednesday night (gales likely over 
most of the lake), with the associated cold front crossing the 
lake late thursday morning. even stronger west to northwesterly 
gales are likely behind the front thursday afternoon into 
thursday night.

a brief lull in the winds is likely mid friday. a clipper system 
crossing southern canada may lead to a period of gusty southerly 
winds late friday into friday night. 


lmz080-669-671-673-675-777-779-870-872-874-876-878-151700-
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-
302 am cst mon dec 15 2025

sheboygan wi to pentwater mi south...

...gale warning in effect until noon cst today...

.today...southwest gales to 35 kt becoming west 15 to 25 kt.
moderate freezing spray this morning. waves 8 to 12 ft 
occasionally to 16 ft subsiding to 7 to 10 ft occasionally to 13 
ft. 
.tonight...west winds 10 to 20 kt becoming southwest 10 to 15 kt.
waves 4 to 7 ft occasionally to 9 ft subsiding to 2 to 4 ft. 
.tuesday...southwest winds 10 to 20 kt increasing to 30 kt. a few
gusts to gale force possible in the afternoon. waves 3 to 5 ft 
building to 10 to 14 ft occasionally to 18 ft.
.tuesday night...southwest winds to 30 kt becoming west. a few
gusts to gale force possible. waves 10 to 14 ft occasionally to 
18 ft.
.wednesday...west winds 15 to 25 kt becoming southwest 10 to
20 kt. waves 6 to 9 ft occasionally to 12 ft subsiding to 3 to
5 ft. 
.wednesday night...south gales to 40 kt. chance of rain. waves
8 to 12 ft occasionally to 16 ft building to 12 to 16 ft
occasionally to 21 ft. 
.thursday...southwest gales to 40 kt becoming west gales to
45 kt. rain with a chance of snow. waves 14 to 18 ft occasionally
to 23 ft. 
.friday...northwest winds 15 to 25 kt becoming southwest to
30 kt. waves 8 to 12 ft occasionally to 16 ft subsiding to 4 to
7 ft occasionally to 9 ft.  

$$

fzus63 kmqt 150936 cca
glfls 
expires:202512152100;;618009

open lake forecast for lake superior...corrected
national weather service marquette mi
436 am est mon dec 15 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 29.9 inch trough moving over the lake today remains until this 
evening. this trough is then followed by a weak 30.0 inch ridge 
tonight before a stronger 29.2 inch trough crosses the lake on 
tuesday as the 29.0 inch parent low tracks across northern ontario. 
weak ridging of 29.9 inches then returns on wednesday before a 29.1 
inch clipper low traverses the lake on thursday. 30.1 inch high 
pressure ridging then builds back in on friday.



lsz162-152100-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
436 am est mon dec 15 2025 /336 am cst mon dec 15 2025/

...gale warning in effect until 7 am est /6 am cst/ this
morning...
...gale watch in effect from tuesday morning through late tuesday
night...

.early this morning...west winds 20 to 30 knots with a few gale force
gusts up to 35 knots. freezing spray. a chance of snow showers. 
waves 5 to 8 feet occasionally to 10 feet. 
.today...west winds 15 to 25 knots becoming northwest 10 to
20 knots. a slight chance of snow showers in the morning. waves
subsiding to calm to 2 feet. 
.tonight...northwest winds 5 to 15 knots backing southwest by
midnight, then increasing to 15 to 25 knots late. waves building
to 3 to 5 feet occasionally to 7 feet. 
.tuesday...southwest gales to 40 knots. waves building to 9 to
12 feet occasionally to 15 feet. 
.tuesday night...west gales to 40 knots becoming northwest gales
to 35 knots after midnight. waves subsiding to 2 to 4 feet. 
.wednesday...west winds 10 to 20 knots becoming southwest 15 to
25 knots in the afternoon. waves subsiding to calm to 2 feet,
then building to 2 to 4 feet. 
.wednesday night...south gales to 35 knots veering southwest
after midnight. a chance of rain showers, possibly mixed with
freezing rain in the evening. a chance of snow showers. rain
showers likely after midnight. waves building to 5 to 8 feet
occasionally to 10 feet. 
.thursday...north gales to 45 knots. snow showers, possibly mixed
with rain and freezing rain likely. heavy freezing spray. waves
building to 9 to 12 feet occasionally to 15 feet, then subsiding
to 1 to 3 feet. 
.friday...south winds 20 to 30 knots increasing to gales to
35 knots. a chance of snow showers. waves subsiding to calm to
2 feet, then building to 5 to 8 feet occasionally to 10 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 150936 cca
glfls 
expires:202512152100;;618010

open lake forecast for lake superior...corrected
national weather service marquette mi
436 am est mon dec 15 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 29.9 inch trough moving over the lake today remains until this 
evening. this trough is then followed by a weak 30.0 inch ridge 
tonight before a stronger 29.2 inch trough crosses the lake on 
tuesday as the 29.0 inch parent low tracks across northern ontario. 
weak ridging of 29.9 inches then returns on wednesday before a 29.1 
inch clipper low traverses the lake on thursday. 30.1 inch high 
pressure ridging then builds back in on friday.



lsz263-152100-
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-
436 am est mon dec 15 2025

...gale warning in effect until 7 am est this morning...
...gale watch in effect from tuesday morning through late tuesday
night...

.early this morning...west winds 20 to 30 knots with a few gale force
gusts up to 35 knots. freezing spray. a chance of snow showers. 
waves 7 to 10 feet occasionally to 13 feet. 
.today...west winds 20 to 30 knots becoming northwest 10 to
20 knots by late morning, then diminishing to 5 to 15 knots by
mid afternoon. freezing spray in the morning. a chance of snow
showers. waves subsiding to 1 to 3 feet. 
.tonight...northwest winds 5 to 15 knots becoming southwest 10 to
20 knots by midnight, then increasing to 20 to 30 knots late. a
slight chance of snow showers after midnight. waves subsiding to
calm to 2 feet, then building to 3 to 5 feet occasionally to
7 feet. 
.tuesday...southwest gales to 40 knots. a slight chance of
drizzle in the morning. waves building to 10 to 14 feet
occasionally to 18 feet. 
.tuesday night...west gales to 40 knots becoming northwest gales
to 35 knots after midnight. a slight chance of drizzle in the
evening. waves subsiding to 5 to 8 feet occasionally to 10 feet. 
.wednesday...west winds 10 to 20 knots becoming southwest 20 to
30 knots in the afternoon. waves subsiding to 1 to 3 feet, then
building to 3 to 5 feet occasionally to 7 feet. 
.wednesday night...south gales to 40 knots. a chance of rain
showers, drizzle and freezing drizzle in the evening. a chance of
snow showers. rain showers likely after midnight. waves building
to 7 to 10 feet occasionally to 13 feet. 
.thursday...north storm force winds to 50 knots diminishing to
gales to 45 knots. snow showers, possibly mixed with rain and
freezing rain likely. heavy freezing spray. waves building to
12 to 17 feet occasionally to 21 feet, then subsiding to 3 to
6 feet occasionally to 8 feet. 
.friday...south winds 20 to 30 knots increasing to gales to
35 knots. a chance of snow showers. freezing spray. 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 150936 cca
glfls 
expires:202512152100;;618011

open lake forecast for lake superior...corrected
national weather service marquette mi
436 am est mon dec 15 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 29.9 inch trough moving over the lake today remains until this 
evening. this trough is then followed by a weak 30.0 inch ridge 
tonight before a stronger 29.2 inch trough crosses the lake on 
tuesday as the 29.0 inch parent low tracks across northern ontario. 
weak ridging of 29.9 inches then returns on wednesday before a 29.1 
inch clipper low traverses the lake on thursday. 30.1 inch high 
pressure ridging then builds back in on friday.



lsz264-152100-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
436 am est mon dec 15 2025

...gale warning in effect until 7 am est this morning...
...gale watch in effect from tuesday morning through wednesday
morning...

.early this morning...southwest winds 20 to 30 knots with a few gale
force gusts up to 35 knots. freezing spray. snow showers likely. 
waves 7 to 10 feet occasionally to 13 feet. 
.today...west winds 20 to 30 knots becoming northwest 10 to
20 knots. freezing spray in the morning. a chance of snow showers
in the morning. waves subsiding to 2 to 4 feet. 
.tonight...north winds 5 to 15 knots backing southwest by
midnight, then increasing to 15 to 25 knots late. a chance of
snow showers after midnight. waves subsiding to calm to 2 feet,
then building to 3 to 5 feet occasionally to 7 feet. 
.tuesday...southwest gales to 40 knots. a chance of drizzle,
freezing drizzle and snow showers in the morning. waves building
to 10 to 14 feet occasionally to 18 feet. 
.tuesday night...west gales to 40 knots veering northwest after
midnight. a slight chance of drizzle. a slight chance of freezing
drizzle and snow showers after midnight. freezing spray after
midnight. waves subsiding to 8 to 11 feet occasionally to
14 feet. 
.wednesday...northwest winds 15 to 25 knots backing southwest in
the afternoon. waves subsiding to 2 to 4 feet, then building to
3 to 5 feet occasionally to 7 feet. 
.wednesday night...south gales to 40 knots. a chance of freezing
drizzle and rain showers in the evening. a chance of snow
showers. rain showers likely after midnight. waves building to
8 to 12 feet occasionally to 15 feet. 
.thursday...north storm force winds to 55 knots. heavy freezing
spray. snow showers, possibly mixed with freezing rain and rain
showers likely. a chance of snow showers. waves building to 15 to
20 feet occasionally to 25 feet, then subsiding to 5 to 8 feet
occasionally to 10 feet. 
.friday...south winds 20 to 30 knots increasing to gales to
35 knots. a chance of snow showers, then snow showers likely.
freezing spray. 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 150936 cca
glfls 
expires:202512152100;;618012

open lake forecast for lake superior...corrected
national weather service marquette mi
436 am est mon dec 15 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 29.9 inch trough moving over the lake today remains until this 
evening. this trough is then followed by a weak 30.0 inch ridge 
tonight before a stronger 29.2 inch trough crosses the lake on 
tuesday as the 29.0 inch parent low tracks across northern ontario. 
weak ridging of 29.9 inches then returns on wednesday before a 29.1 
inch clipper low traverses the lake on thursday. 30.1 inch high 
pressure ridging then builds back in on friday.



lsz265-152100-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
436 am est mon dec 15 2025

...gale watch in effect from tuesday afternoon through wednesday
morning...

.early this morning...southwest winds 25 to 30 knots. freezing 
spray. snow showers likely. waves 3 to 6 feet occasionally to 8 feet.
.today...west winds 20 to 30 knots diminishing to 15 to 25 knots
by late morning, then veering northwest by mid afternoon.
freezing spray in the morning. a chance of snow showers. waves
subsiding to 2 to 4 feet. 
.tonight...northwest winds 10 to 20 knots backing southwest late.
a slight chance of snow showers in the evening. waves subsiding
to calm to 2 feet, then building to 1 to 3 feet. 
.tuesday...south winds 15 to 25 knots becoming southwest gales to
35 knots. a chance of snow showers, a slight chance of drizzle
and freezing drizzle in the morning. waves building to 4 to
7 feet occasionally to 9 feet. 
.tuesday night...west gales to 40 knots. a slight chance of
drizzle. a slight chance of freezing drizzle and snow showers
after midnight. waves building to 7 to 11 feet occasionally to
14 feet. 
.wednesday...northwest winds 20 to 30 knots backing south in the
afternoon. waves subsiding to 1 to 3 feet, then building to 2 to
4 feet. 
.wednesday night...south gales to 45 knots. a chance of freezing
drizzle in the evening. a chance of drizzle and snow showers.
rain showers and freezing drizzle likely after midnight. waves
building to 8 to 11 feet occasionally to 14 feet, then subsiding
to 6 to 9 feet occasionally to 11 feet. 
.thursday...northwest storm force winds to 55 knots veering
north. heavy freezing spray. freezing rain, possibly mixed with
rain showers. snow showers. waves subsiding to 5 to 8 feet
occasionally to 10 feet, then building to 17 to 22 feet
occasionally to 28 feet. 
.friday...north winds 20 to 30 knots becoming south gales to
35 knots. a chance of snow showers, then snow showers likely.
freezing spray. waves subsiding to 2 to 4 feet, then building to
6 to 9 feet occasionally to 11 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 150936 cca
glfls 
expires:202512152100;;618013

open lake forecast for lake superior...corrected
national weather service marquette mi
436 am est mon dec 15 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 29.9 inch trough moving over the lake today remains until this 
evening. this trough is then followed by a weak 30.0 inch ridge 
tonight before a stronger 29.2 inch trough crosses the lake on 
tuesday as the 29.0 inch parent low tracks across northern ontario. 
weak ridging of 29.9 inches then returns on wednesday before a 29.1 
inch clipper low traverses the lake on thursday. 30.1 inch high 
pressure ridging then builds back in on friday.



lsz266-152100-
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-
436 am est mon dec 15 2025

...gale watch in effect from tuesday morning through wednesday
morning...

.early this morning...southwest winds to 30 knots with a few gale
force gusts up to 35 knots possible. freezing spray. snow showers. 
waves 6 to 9 feet occasionally to 11 feet. 
.today...west winds 20 to 30 knots diminishing to 15 to 25 knots
by late morning, then veering northwest by mid afternoon.
freezing spray in the morning. a chance of snow showers. waves
subsiding to 3 to 6 feet occasionally to 8 feet. 
.tonight...northwest winds 10 to 20 knots backing west by
midnight, then becoming southwest 15 to 25 knots late. a slight
chance of snow showers in the evening. waves subsiding to 1 to
3 feet, then building to 2 to 4 feet. 
.tuesday...south winds 20 to 30 knots increasing to gales to
35 knots by late morning, then veering southwest by mid
afternoon. a chance of freezing drizzle and snow showers in the
morning. a chance of drizzle. waves building to 10 to 14 feet
occasionally to 18 feet. 
.tuesday night...southwest gales to 40 knots veering northwest
after midnight. a chance of drizzle. a chance of snow showers and
freezing drizzle after midnight. waves building to 12 to 17 feet
occasionally to 21 feet, then subsiding to 11 to 15 feet
occasionally to 19 feet. 
.wednesday...northwest gales to 35 knots becoming southwest 20 to
30 knots in the afternoon. waves subsiding to 3 to 6 feet
occasionally to 8 feet. 
.wednesday night...south gales to 45 knots. a chance of freezing
drizzle in the evening. a chance of snow showers. rain showers,
drizzle and freezing drizzle likely after midnight. waves
building to 11 to 15 feet occasionally to 19 feet, then subsiding
to 10 to 14 feet occasionally to 18 feet. 
.thursday...northwest storm force winds to 55 knots veering
north. heavy freezing spray. snow showers, possibly mixed with
rain and freezing rain. a chance of snow showers. waves subsiding
to 8 to 11 feet occasionally to 14 feet, then building to 20 to
25 feet occasionally to 31 feet. 
.friday...north gales to 35 knots becoming south gales to
40 knots. freezing spray. a chance of snow showers. snow showers.
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 150936 cca
glfls 
expires:202512152100;;618014

open lake forecast for lake superior...corrected
national weather service marquette mi
436 am est mon dec 15 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 29.9 inch trough moving over the lake today remains until this 
evening. this trough is then followed by a weak 30.0 inch ridge 
tonight before a stronger 29.2 inch trough crosses the lake on 
tuesday as the 29.0 inch parent low tracks across northern ontario. 
weak ridging of 29.9 inches then returns on wednesday before a 29.1 
inch clipper low traverses the lake on thursday. 30.1 inch high 
pressure ridging then builds back in on friday.



lsz267-152100-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
436 am est mon dec 15 2025

...gale watch in effect from tuesday morning through wednesday
morning...

.early this morning...southwest winds to 30 knots with a few gale
force gusts up to 35 knots possible. freezing spray. snow showers 
likely. waves 4 to 8 feet occasionally to 10 feet. 
.today...southwest winds to 30 knots with a few gale force gusts up
to 35 kt possible becoming west 20 to 30 knots by late morning, then
veering northwest by mid afternoon. freezing spray in the morning. 
snow showers likely in the morning, then a chance of snow showers in 
the afternoon. waves building to 6 to 9 feet occasionally to 11 feet,
then subsiding to 3 to 6 feet occasionally to 8 feet. 
.tonight...northwest winds 15 to 25 knots diminishing to 10 to
20 knots by midnight, then becoming southwest 15 to 25 knots
late. a slight chance of snow showers in the evening. waves
subsiding to 1 to 3 feet, then building to 2 to 4 feet. 
.tuesday...south winds 20 to 30 knots increasing to gales to
40 knots by late morning, then veering southwest by mid
afternoon. a slight chance of freezing drizzle and snow showers
in the morning. a chance of drizzle. waves building to 8 to
11 feet occasionally to 14 feet. 
.tuesday night...southwest gales to 35 knots becoming west gales
to 40 knots after midnight. a chance of drizzle. a chance of
freezing drizzle and snow showers after midnight. waves subsiding
to 7 to 10 feet occasionally to 13 feet, then building to 12 to
17 feet occasionally to 21 feet. 
.wednesday...northwest gales to 35 knots becoming west 15 to
25 knots in the afternoon. waves subsiding to 3 to 5 feet
occasionally to 7 feet. 
.wednesday night...south gales to 45 knots. a chance of freezing
drizzle in the evening. a chance of snow showers. rain showers
likely after midnight. waves building to 7 to 11 feet
occasionally to 14 feet. 
.thursday...south gales to 40 knots becoming north gales to
45 knots. rain showers. snow showers, possibly mixed with
freezing rain. freezing spray. waves building to 12 to 17 feet
occasionally to 21 feet, then subsiding to 8 to 11 feet
occasionally to 14 feet. 
.friday...north winds 15 to 25 knots becoming south gales to
40 knots. freezing spray. a chance of snow showers. snow showers.
waves subsiding to 2 to 4 feet, then building to 7 to 10 feet
occasionally to 13 feet. 

note, wave height forecasts are for ice free areas.

$$