fzus63 kdtx 112035
glflh 
expires:202512120445;;409249

open lake forecast for lake huron
national weather service detroit/pontiac mi
335 pm est thu dec 11 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, 30.10 inches, will reside over the
great lakes through friday. this is followed by low pressure,
29.70 inches, moving in from central canada into northern ontario
friday night and saturday. sporadic gale force wind gusts are
possible with this system.


lhz361-362-120445-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
lake huron from presque isle light to sturgeon point mi beyond
5nm off shore-
335 pm est thu dec 11 2025

.tonight...northwest winds 15 to 20 knots decreasing to 10 to
15 knots in the late evening and overnight. waves 3 to 5 feet. 
.friday...west winds 10 to 15 knots backing to the southwest late
in the afternoon. waves 2 to 4 feet subsiding to 1 to 3 feet in
the afternoon. 
.friday night...southwest winds 10 to 15 knots increasing to
20 to 25 knots. snow showers in the evening...then numerous snow
showers after midnight. waves 2 to 4 feet building to 6 to 9 feet
in the late evening and overnight. waves occasionally around
12 feet. 
.saturday...west winds to 30 knots. scattered snow showers.
freezing spray. waves 8 to 12 feet. waves occasionally around
15 feet. 
.saturday night...west winds to 30 knots becoming northwest 20 to
25 knots in the late evening and overnight. scattered snow
showers. freezing spray. waves 8 to 12 feet. waves occasionally
around 15 feet. 
.sunday...northwest winds 20 to 25 knots decreasing to 10 to
15 knots. freezing spray. waves 6 to 9 feet subsiding to 4 to
6 feet late in the evening. waves occasionally around 12 feet. 
.monday...southwest winds 15 to 20 knots increasing to 20 to
25 knots with gusts to around 30 knots until early evening...then
becoming west 15 to 20 knots in the late evening and early
morning. a chance of snow early in the morning...then snow likely
until early evening. waves 5 to 7 feet building to 8 to 12 feet.
waves occasionally around 15 feet. 
.tuesday...west winds 10 to 15 knots becoming southwest 20 to
25 knots with gusts to around 30 knots until early morning. waves
4 to 6 feet building to 10 to 14 feet until early morning. waves
occasionally around 18 feet. 


$$

fzus63 kdtx 112035
glflh 
expires:202512120445;;409250

open lake forecast for lake huron
national weather service detroit/pontiac mi
335 pm est thu dec 11 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, 30.10 inches, will reside over the
great lakes through friday. this is followed by low pressure,
29.70 inches, moving in from central canada into northern ontario
friday night and saturday. sporadic gale force wind gusts are
possible with this system.


lhz363-462-120445-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
lake huron from port austin to harbor beach beyond 5nm off shore-
335 pm est thu dec 11 2025

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


$$

fzus63 kmkx 112042
glflm 
expires:202512120415;;409498

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
242 pm cst thu dec 11 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...

northwest winds will continue to weaken through the evening as 
high pressure around 30.1 inches moves east as a low pressure
around 29.7 inches tracks in from the plains tonight and up the
ohio river valley on friday. light winds overnight will gradually
pick up behind the low on friday and may be a brief window of 
west to northwest gust around gale force friday night through 
saturday night as a strong arctic cold front moves through the 
region. however, due to brisk conditions, looking like heavy 
freezing spray will develop during this period as the colder 
airmass moves into the great lakes region. then a strong high 
pressure around 30.8 inches will move southeast from the northern
plains and through the region sunday and to the south early next 
week. will see winds ease later sunday, but gusty winds may 
return early next week behind the exiting high as temps warm back
to near normal.


lmz261-362-364-366-563-565-567-868-120415-
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-
242 pm cst thu dec 11 2025

sheboygan wi to pentwater mi north...

.tonight...northwest winds 10 to 15 kt becoming west. slight
chance of snow overnight. waves 1 to 3 ft. 
.friday...west winds 10 to 15 kt becoming southwest 10 to 20 kt.
slight chance of snow in the morning, then chance of snow in the
afternoon. waves 1 to 3 ft building to 2 to 4 ft.
.friday night...west winds to 30 kt becoming northwest. chance of
snow in the evening. freezing spray in the evening, then heavy
freezing spray overnight. waves 4 to 7 ft occasionally to 9 ft
building to 8 to 12 ft occasionally to 16 ft. 
.saturday...northwest winds to 30 kt. heavy freezing spray.
chance of snow. waves 8 to 12 ft occasionally to 16 ft subsiding
to 7 to 10 ft occasionally to 13 ft. 
.saturday night...northwest winds to 30 kt. heavy freezing spray.
chance of snow. waves 8 to 12 ft occasionally to 16 ft. 
.sunday...northwest winds to 30 kt. freezing spray in the
morning. waves 8 to 12 ft occasionally to 16 ft subsiding to 6 to
9 ft occasionally to 12 ft. 
.sunday night...west winds 10 to 20 kt becoming southwest to
30 kt. waves 3 to 5 ft building to 5 to 8 ft occasionally to
10 ft. 
.monday...southwest gales to 40 kt becoming west. freezing spray.
chance of snow. waves 8 to 12 ft occasionally to 16 ft. 
.tuesday...southwest winds 15 to 25 kt increasing to gales to
40 kt. waves 3 to 5 ft building to 8 to 12 ft occasionally to
16 ft.  

$$

fzus63 kmkx 112042
glflm 
expires:202512120415;;409499

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
242 pm cst thu dec 11 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...

northwest winds will continue to weaken through the evening as 
high pressure around 30.1 inches moves east as a low pressure
around 29.7 inches tracks in from the plains tonight and up the
ohio river valley on friday. light winds overnight will gradually
pick up behind the low on friday and may be a brief window of 
west to northwest gust around gale force friday night through 
saturday night as a strong arctic cold front moves through the 
region. however, due to brisk conditions, looking like heavy 
freezing spray will develop during this period as the colder 
airmass moves into the great lakes region. then a strong high 
pressure around 30.8 inches will move southeast from the northern
plains and through the region sunday and to the south early next 
week. will see winds ease later sunday, but gusty winds may 
return early next week behind the exiting high as temps warm back
to near normal.


lmz080-669-671-673-675-777-779-870-872-874-876-878-120415-
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-
242 pm cst thu dec 11 2025

sheboygan wi to pentwater mi south...

.tonight...northwest winds 5 to 10 kt veering to east. slight
chance of snow overnight. waves 1 to 3 ft subsiding to 1 to 2 ft.
.friday...east winds 5 to 10 kt veering to southwest 10 to 15 kt
late in the morning, then increasing to 10 to 20 kt early in the
afternoon becoming west late. slight chance of snow in the
morning, then chance of snow in the afternoon. waves 1 to 3 ft
building to 2 to 4 ft. 
.friday night...west winds to 30 kt becoming northwest gales to
35 kt. chance of snow and light freezing rain in the evening.
freezing spray. waves 4 to 7 ft occasionally to 9 ft building to
10 to 14 ft occasionally to 18 ft. 
.saturday...northwest winds to 30 kt. heavy freezing spray.
chance of snow. waves 10 to 14 ft occasionally to 18 ft. 
.saturday night...northwest gales to 35 kt diminishing to 30 kt.
heavy freezing spray. chance of snow. waves 10 to 14 ft
occasionally to 18 ft. 
.sunday...northwest winds to 30 kt. chance of snow in the
morning. freezing spray. waves 10 to 14 ft occasionally to 18 ft.
.sunday night...west winds 10 to 20 kt becoming southwest to
30 kt. waves 5 to 8 ft occasionally to 10 ft. 
.monday...southwest gales to 40 kt. freezing spray. waves 10 to
14 ft occasionally to 18 ft. 
.tuesday...southwest winds 15 to 25 kt increasing to 30 kt. waves
4 to 7 ft occasionally to 9 ft building to 8 to 12 ft
occasionally to 16 ft.  

$$

fzus63 kmqt 112101
glfls 
expires:202512120900;;410172

open lake forecast for lake superior
national weather service marquette mi
400 pm est thu dec 11 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...

broad 30.1 inch ridging moves over the mississippi valley this 
evening before, then moving over the great lakes friday morning 
ahead of a trough from northern ontario. this trough deepens from 
29.9 inches to 29.7 inches through the afternoon to evening hours of 
friday. as this low exits to the east saturday, a 30.6 inch high 
settles over the dakotas saturday evening. this high builds to 30.7 
inches over illinois sunday evening and towards the virginias by 
monday morning. in its wake, a 29.9 inch trough will pass over lake 
superior monday afternoon associated with a 29.7 inch low over 
hudson bay. 30.1 inch ridging resumes over the lake monday night 
into tuesday ahead of a 29.2 inch low moving into manitoba tuesday 
afternoon.



lsz162-120900-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 pm est thu dec 11 2025 /300 pm cst thu dec 11 2025/

.late this afternoon...west winds 5 to 15 knots. waves calm to
2 feet. 
.tonight...west winds 5 to 15 knots backing southwest by
midnight, then veering west late. waves calm to 2 feet. 
.friday...west winds 10 to 20 knots increasing to 15 to 25 knots
by late morning, then becoming northwest 20 to 30 knots by mid
afternoon. snow showers likely in the morning, then a chance of
snow showers in the afternoon. waves building to 3 to 6 feet
occasionally to 8 feet. 
.friday night...northwest winds to 30 knots with a few gale force
gusts to 35 knots possible. a chance of snow showers. waves
building to 4 to 7 feet occasionally to 9 feet, then subsiding to
3 to 6 feet occasionally to 8 feet. 
.saturday...northwest gales to 35 knots. heavy freezing spray. a
chance of snow showers. waves 3 to 6 feet occasionally to 8 feet.
.saturday night...northwest gales to 35 knots diminishing to
20 to 30 knots after midnight. waves subsiding to 1 to 3 feet. 
.sunday...northwest winds 15 to 25 knots becoming southwest 10 to
20 knots in the afternoon. waves subsiding to calm to 2 feet. 
.sunday night...southwest winds 20 to 30 knots increasing to
gales to 35 knots after midnight. a chance of snow showers.
freezing spray after midnight. waves building to 5 to 8 feet
occasionally to 10 feet. 
.monday...west winds 20 to 30 knots becoming southwest 5 to
15 knots. waves subsiding to calm to 2 feet. 
.tuesday...southwest gales to 35 knots becoming west 20 to
30 knots. waves building to 4 to 7 feet occasionally to 9 feet,
then subsiding to 2 to 4 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 112101
glfls 
expires:202512120900;;410173

open lake forecast for lake superior
national weather service marquette mi
400 pm est thu dec 11 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...

broad 30.1 inch ridging moves over the mississippi valley this 
evening before, then moving over the great lakes friday morning 
ahead of a trough from northern ontario. this trough deepens from 
29.9 inches to 29.7 inches through the afternoon to evening hours of 
friday. as this low exits to the east saturday, a 30.6 inch high 
settles over the dakotas saturday evening. this high builds to 30.7 
inches over illinois sunday evening and towards the virginias by 
monday morning. in its wake, a 29.9 inch trough will pass over lake 
superior monday afternoon associated with a 29.7 inch low over 
hudson bay. 30.1 inch ridging resumes over the lake monday night 
into tuesday ahead of a 29.2 inch low moving into manitoba tuesday 
afternoon.



lsz263-120900-
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 pm est thu dec 11 2025

...gale watch in effect from friday evening through sunday
morning...

.late this afternoon...northwest winds less than 10 knots. waves
calm to 2 feet. 
.tonight...northwest winds 5 to 15 knots backing west by
midnight. waves calm to 2 feet. 
.friday...west winds 10 to 20 knots increasing to 20 to 30 knots.
a chance of snow showers in the morning, then snow showers in the
afternoon. waves building to 4 to 7 feet occasionally to 9 feet. 
.friday night...northwest gales to 35 knots. heavy freezing
spray. a chance of snow showers. waves building to 5 to 9 feet
occasionally to 11 feet. 
.saturday...northwest gales to 35 knots. heavy freezing spray. a
chance of snow showers. waves subsiding to 4 to 8 feet
occasionally to 10 feet. 
.saturday night...northwest gales to 35 knots veering north after
midnight. heavy freezing spray. a chance of snow showers. waves
subsiding to 3 to 6 feet occasionally to 8 feet. 
.sunday...northwest winds 15 to 25 knots backing west in the
afternoon. waves subsiding to calm to 2 feet, then building to
1 to 3 feet. 
.sunday night...southwest gales to 35 knots. a chance of snow
showers. freezing spray after midnight. waves building to 7 to
10 feet occasionally to 13 feet. 
.monday...west gales to 35 knots becoming northwest 10 to
20 knots. freezing spray. waves subsiding to calm to 2 feet. 
.tuesday...southwest gales to 40 knots veering west. waves
building to 5 to 9 feet occasionally to 11 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 112101
glfls 
expires:202512120900;;410174

open lake forecast for lake superior
national weather service marquette mi
400 pm est thu dec 11 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...

broad 30.1 inch ridging moves over the mississippi valley this 
evening before, then moving over the great lakes friday morning 
ahead of a trough from northern ontario. this trough deepens from 
29.9 inches to 29.7 inches through the afternoon to evening hours of 
friday. as this low exits to the east saturday, a 30.6 inch high 
settles over the dakotas saturday evening. this high builds to 30.7 
inches over illinois sunday evening and towards the virginias by 
monday morning. in its wake, a 29.9 inch trough will pass over lake 
superior monday afternoon associated with a 29.7 inch low over 
hudson bay. 30.1 inch ridging resumes over the lake monday night 
into tuesday ahead of a 29.2 inch low moving into manitoba tuesday 
afternoon.



lsz264-120900-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
400 pm est thu dec 11 2025

...gale watch in effect from friday evening through sunday
morning...

.late this afternoon...northwest winds 5 to 15 knots. waves calm
to 2 feet. 
.tonight...northwest winds 5 to 15 knots. a slight chance of snow
showers after midnight. waves calm to 2 feet. 
.friday...west winds 5 to 15 knots becoming southwest 15 to
25 knots by late morning, then becoming west 20 to 30 knots by
mid afternoon. a chance of snow showers in the morning, then snow
showers in the afternoon. waves building to 3 to 6 feet
occasionally to 8 feet. 
.friday night...northwest winds 20 to 30 knots increasing to
gales to 40 knots by midnight. patchy dense fog in the evening.
heavy freezing spray. snow showers likely in the evening. a
chance of snow showers after midnight. waves building to 7 to
10 feet occasionally to 13 feet. 
.saturday...northwest gales to 40 knots. heavy freezing spray. a
chance of snow showers in the morning. snow showers likely in the
afternoon. waves subsiding to 6 to 9 feet occasionally to
11 feet, then building to 7 to 10 feet occasionally to 13 feet. 
.saturday night...north gales to 35 knots. heavy freezing spray.
a chance of snow showers. waves subsiding to 6 to 9 feet
occasionally to 11 feet. 
.sunday...northwest winds 20 to 30 knots becoming west 10 to
20 knots in the afternoon. freezing spray in the morning. waves
subsiding to 1 to 3 feet. 
.sunday night...southwest winds 20 to 30 knots increasing to
gales to 35 knots after midnight. a chance of snow showers.
freezing spray after midnight. waves building to 8 to 11 feet
occasionally to 14 feet. 
.monday...west gales to 35 knots becoming northwest 15 to
25 knots. freezing spray. a chance of snow showers. waves
subsiding to calm to 2 feet. 
.tuesday...south gales to 35 knots veering west. a chance of
freezing drizzle. waves building to 6 to 10 feet occasionally to
13 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 112101
glfls 
expires:202512120900;;410175

open lake forecast for lake superior
national weather service marquette mi
400 pm est thu dec 11 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...

broad 30.1 inch ridging moves over the mississippi valley this 
evening before, then moving over the great lakes friday morning 
ahead of a trough from northern ontario. this trough deepens from 
29.9 inches to 29.7 inches through the afternoon to evening hours of 
friday. as this low exits to the east saturday, a 30.6 inch high 
settles over the dakotas saturday evening. this high builds to 30.7 
inches over illinois sunday evening and towards the virginias by 
monday morning. in its wake, a 29.9 inch trough will pass over lake 
superior monday afternoon associated with a 29.7 inch low over 
hudson bay. 30.1 inch ridging resumes over the lake monday night 
into tuesday ahead of a 29.2 inch low moving into manitoba tuesday 
afternoon.



lsz265-120900-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
400 pm est thu dec 11 2025

...gale watch in effect from friday evening through sunday
morning...

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

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 112101
glfls 
expires:202512120900;;410176

open lake forecast for lake superior
national weather service marquette mi
400 pm est thu dec 11 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...

broad 30.1 inch ridging moves over the mississippi valley this 
evening before, then moving over the great lakes friday morning 
ahead of a trough from northern ontario. this trough deepens from 
29.9 inches to 29.7 inches through the afternoon to evening hours of 
friday. as this low exits to the east saturday, a 30.6 inch high 
settles over the dakotas saturday evening. this high builds to 30.7 
inches over illinois sunday evening and towards the virginias by 
monday morning. in its wake, a 29.9 inch trough will pass over lake 
superior monday afternoon associated with a 29.7 inch low over 
hudson bay. 30.1 inch ridging resumes over the lake monday night 
into tuesday ahead of a 29.2 inch low moving into manitoba tuesday 
afternoon.



lsz266-120900-
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 pm est thu dec 11 2025

...gale watch in effect from friday evening through sunday
morning...

.late this afternoon...northwest winds 10 to 20 knots. a slight
chance of snow showers. waves 2 to 4 feet. 
.tonight...northwest winds 10 to 20 knots. a slight chance of
snow showers. waves subsiding to 1 to 3 feet. 
.friday...west winds 10 to 20 knots backing southwest by late
morning, then increasing to 15 to 25 knots by mid afternoon. a
chance of snow showers. waves subsiding to calm to 2 feet, then
building to 2 to 4 feet. 
.friday night...west gales to 35 knots becoming northwest gales
to 45 knots by midnight. patchy fog in the evening. freezing
spray. snow showers. waves building to 9 to 12 feet occasionally
to 15 feet. 
.saturday...northwest gales to 45 knots. heavy freezing spray.
snow showers. waves building to 10 to 14 feet occasionally to
18 feet, then subsiding to 9 to 12 feet occasionally to 15 feet. 
.saturday night...north gales to 40 knots. freezing spray. snow
showers in the evening. a chance of snow showers after midnight.
waves subsiding to 9 to 12 feet occasionally to 15 feet. 
.sunday...north winds 20 to 30 knots becoming northwest 15 to
25 knots in the afternoon. freezing spray in the morning. a
chance of snow showers. waves subsiding to 3 to 5 feet
occasionally to 7 feet. 
.sunday night...southwest winds 15 to 25 knots increasing to
20 to 30 knots after midnight. a chance of snow showers. freezing
spray 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. freezing
spray. a chance of snow showers. waves building to 7 to 10 feet
occasionally to 13 feet, then subsiding to 2 to 4 feet. 
.tuesday...south gales to 40 knots becoming southwest gales to
35 knots. a chance of freezing drizzle and snow showers. waves
building to 8 to 11 feet occasionally to 14 feet, then subsiding
to 6 to 9 feet occasionally to 11 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 112101
glfls 
expires:202512120900;;410177

open lake forecast for lake superior
national weather service marquette mi
400 pm est thu dec 11 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...

broad 30.1 inch ridging moves over the mississippi valley this 
evening before, then moving over the great lakes friday morning 
ahead of a trough from northern ontario. this trough deepens from 
29.9 inches to 29.7 inches through the afternoon to evening hours of 
friday. as this low exits to the east saturday, a 30.6 inch high 
settles over the dakotas saturday evening. this high builds to 30.7 
inches over illinois sunday evening and towards the virginias by 
monday morning. in its wake, a 29.9 inch trough will pass over lake 
superior monday afternoon associated with a 29.7 inch low over 
hudson bay. 30.1 inch ridging resumes over the lake monday night 
into tuesday ahead of a 29.2 inch low moving into manitoba tuesday 
afternoon.



lsz267-120900-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
400 pm est thu dec 11 2025

...gale watch in effect from friday evening through sunday
morning...

.late this afternoon...northwest winds 10 to 20 knots. waves 2 to
4 feet. 
.tonight...northwest winds 10 to 20 knots. a chance of snow
showers. waves subsiding to 1 to 3 feet. 
.friday...northwest winds 10 to 20 knots backing west by late
morning, then becoming southwest 15 to 25 knots by mid afternoon.
a chance of snow showers. waves subsiding to calm to 2 feet, then
building to 2 to 4 feet. 
.friday night...southwest winds 20 to 30 knots becoming west
gales to 40 knots by midnight. patchy fog in the evening.
freezing spray after midnight. snow showers. waves building to
9 to 12 feet occasionally to 15 feet. 
.saturday...northwest gales to 40 knots. freezing spray. snow
showers. waves building to 10 to 14 feet occasionally to 18 feet,
then subsiding to 9 to 12 feet occasionally to 15 feet. 
.saturday night...north gales to 35 knots. freezing spray. snow
showers in the evening. a chance of snow showers after midnight.
waves subsiding to 6 to 9 feet occasionally to 11 feet. 
.sunday...north winds 20 to 30 knots becoming northwest 15 to
25 knots in the 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 chance of snow showers. freezing
spray after midnight. waves subsiding to 2 to 4 feet, then
building to 5 to 8 feet occasionally to 10 feet. 
.monday...southwest winds 20 to 30 knots becoming northwest 15 to
25 knots. freezing spray. snow showers, then a chance of snow
showers. waves building to 7 to 10 feet occasionally to 13 feet,
then subsiding to 2 to 4 feet. 
.tuesday...south gales to 35 knots veering southwest. a chance of
freezing drizzle. a chance of snow showers. waves building to
6 to 10 feet occasionally to 13 feet. 

note, wave height forecasts are for ice free areas.

$$