fzus63 kdtx 200757
glflh 
expires:202510201600;;442049

open lake forecast for lake huron
national weather service detroit/pontiac mi
357 am edt mon oct 20 2025

for waters beyond five nautical miles off shore on lake huron

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

.synopsis...behind the departing low, northwest gales are expected
through early tonight. high pressure builds in briefly on monday
before another low pressure moves through the region on tuesday
bringing another chance at near gales.


lhz362-201600-
lake huron from presque isle light to sturgeon point mi beyond
5nm off shore-
357 am edt mon oct 20 2025

.today...northwest winds 15 to 20 knots becoming west 10 to
15 knots in the late morning and early afternoon...then
decreasing to 5 to 10 knots late in the afternoon. waves 6 to
9 feet subsiding to 3 to 5 feet in the afternoon. waves
occasionally around 12 feet. 
.tonight...south winds 5 to 10 knots increasing to 15 to
20 knots. a chance of showers after midnight. waves 1 to 3 feet
building to 6 to 9 feet. waves occasionally around 12 feet. 
.tuesday...southeast winds 20 to 25 knots becoming south 15 to
20 knots in the late morning and early afternoon...then veering
to the southwest early in the afternoon. showers in the morning.
waves 8 to 12 feet. waves occasionally around 15 feet. 
.tuesday night...southwest winds 10 to 15 knots. showers. waves
5 to 7 feet. waves occasionally around 10 feet. 
.wednesday...west winds 10 to 15 knots becoming northwest 15 to
20 knots late in the afternoon. a chance of waterspouts. showers
likely in the morning...then showers. waves 4 to 6 feet building
to 8 to 12 feet late in the afternoon. waves occasionally around
15 feet. 
.thursday...northwest winds 20 to 25 knots with gusts to around
30 knots decreasing to 15 to 20 knots in the late evening and
early morning. showers likely...then a chance of showers in the
late evening and early morning. waves 6 to 9 feet. waves
occasionally around 12 feet. 
.friday...west winds 10 to 15 knots decreasing to 5 to 10 knots
in the late evening and early morning. a chance of showers in the
late morning and early afternoon. waves 3 to 5 feet subsiding to
1 to 3 feet in the late evening and early morning. 


$$

fzus63 kdtx 200757
glflh 
expires:202510201600;;442050

open lake forecast for lake huron
national weather service detroit/pontiac mi
357 am edt mon oct 20 2025

for waters beyond five nautical miles off shore on lake huron

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

.synopsis...behind the departing low, northwest gales are expected
through early tonight. high pressure builds in briefly on monday
before another low pressure moves through the region on tuesday
bringing another chance at near gales.


lhz363-462-463-201600-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
lake huron from port austin to harbor beach beyond 5nm off shore-
lake huron from harbor beach to port sanilac beyond 5nm off shore-
357 am edt mon oct 20 2025

.today...northwest winds 15 to 20 knots becoming west 10 to
15 knots early in the afternoon...then becoming southwest 5 to
10 knots late in the afternoon. waves 6 to 9 feet subsiding to
3 to 5 feet late in the afternoon. waves occasionally around
12 feet. 
.tonight...south winds 5 to 10 knots increasing to 20 to 25 knots
with gusts to around 30 knots. a chance of showers after
midnight. waves 1 to 3 feet building to 5 to 7 feet after
midnight. waves occasionally around 10 feet. 
.tuesday...south winds 20 to 25 knots with gusts to around
30 knots becoming southwest 15 to 20 knots in the late morning
and afternoon. showers in the morning...then a chance of showers
in the afternoon. waves 8 to 12 feet. waves occasionally around
15 feet. 
.tuesday night...southwest winds 15 to 20 knots. a chance of
showers in the evening...then showers after midnight. a chance of
waterspouts after midnight. waves 6 to 9 feet. waves occasionally
around 12 feet. 
.wednesday...west winds 15 to 20 knots increasing to 20 to
25 knots late in the afternoon. showers. a chance of waterspouts
in the morning. a chance of waterspouts late in the afternoon.
waves 6 to 9 feet building to 8 to 12 feet late in the afternoon.
waves occasionally around 15 feet. 
.thursday...west winds 20 to 25 knots with gusts to around
30 knots decreasing to 15 to 20 knots in the late evening and
early morning. a chance of waterspouts early in the morning.
showers likely early in the morning...then showers early in the
evening. a chance of showers in the late evening and early
morning. waves 8 to 12 feet. waves occasionally around 15 feet. 
.friday...west winds 15 to 20 knots decreasing to 5 to 10 knots.
a chance of showers. waves 4 to 6 feet subsiding to 2 to 4 feet
in the late evening and early morning. waves occasionally around
8 feet. 


$$

fzus63 kdtx 200757
glflh 
expires:202510201600;;442048

open lake forecast for lake huron
national weather service detroit/pontiac mi
357 am edt mon oct 20 2025

for waters beyond five nautical miles off shore on lake huron

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

.synopsis...behind the departing low, northwest gales are expected
through early tonight. high pressure builds in briefly on monday
before another low pressure moves through the region on tuesday
bringing another chance at near gales.


lhz361-201600-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
357 am edt mon oct 20 2025

.today...northwest winds 10 to 15 knots becoming west 5 to
10 knots in the afternoon. waves 3 to 5 feet subsiding to 1 to
3 feet in the afternoon. 
.tonight...southeast winds 5 to 10 knots increasing to 15 to
20 knots. waves 2 feet or less building to 3 to 5 feet after
midnight. 
.tuesday...southeast winds 15 to 20 knots veering to the
southwest early in the afternoon. showers in the morning. waves
5 to 7 feet. waves occasionally around 10 feet. 
.tuesday night...southwest winds 10 to 15 knots decreasing to
5 to 10 knots in the late evening and overnight. showers likely.
waves 3 to 5 feet subsiding to 1 to 3 feet in the late evening
and overnight. 
.wednesday...west winds 5 to 10 knots increasing to 10 to
15 knots late in the morning...then becoming northwest 15 to
20 knots late in the afternoon. showers likely in the morning...
then showers. waves 1 to 3 feet building to 5 to 7 feet. waves
occasionally around 10 feet. 
.thursday...northwest winds 15 to 20 knots with gusts to around
30 knots increasing to 20 to 25 knots with gusts to 35 knot gales
early in the evening...then decreasing to 10 to 15 knots in the
late evening and early morning. a chance of showers early in the
morning...then showers likely until early evening. a chance of
showers in the late evening and early morning. waves 5 to 7 feet.
waves occasionally around 10 feet. 
.friday...northwest winds 10 to 15 knots becoming west 5 to
10 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 


$$

fzus63 kmkx 200742
glflm 
expires:202510201515;;441722

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
242 am cdt mon oct 20 2025

for waters beyond five nautical miles of shore on lake michigan.

waves are provided as a range of significant wave heights, which
is the average of the highest 1/3 of the wave, along with the
average height of the highest 10% of the waves which will
occasionally be encountered.

.synopsis...

southerly winds will increase rapidly this afternoon ahead of 
developing 29.4 inch low pressure in minnesota. said low will move
into lake superior tonight into tuesday, allowing winds to shift 
out of the west. winds will gradually turn northwesterly tuesday 
night as the aforementioned surface low migrates toward the 
ontario- quebec border. 

southerly gales are expected across the southern and central
portion of the lake from late this afternoon through late this
evening. there will then be a lull in the gales from late tonight
through tuesday morning, followed by northwest gales tuesday
afternoon through wednesday. a long duration gale warning has been
issued starting this afternoon to capture both gale events. 

winds will lighten through the end of the week as high 
pressure builds in from the northern great plains.


lmz261-362-364-366-563-565-201515-
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-
242 am cdt mon oct 20 2025

two rivers wi to manistee mi north...

.today...west winds 10 to 15 kt becoming southwest 10 to 20 kt
late this morning, then increasing to 15 to 25 kt early this
afternoon becoming south to 30 kt late. waves 1 to 3 ft building
to 6 to 9 ft occasionally to 12 ft. 
.tonight...south winds to 30 kt late in the evening, then 
becoming southwest after midnight becoming west 15 to 25 kt late. 
chance of showers in the evening, then showers overnight. waves 10
to 14 ft occasionally to 18 ft subsiding to 8 to 11 ft 
occasionally to 14 ft. 
.tuesday...west winds to 30 kt. chance of showers in the morning,
then showers in the afternoon. waves 6 to 9 ft occasionally to
12 ft. 
.tuesday night...west winds to 30 kt becoming northwest. rain
showers. waves 5 to 8 ft occasionally to 10 ft. 
.wednesday...northwest winds to 30 kt. rain showers. waves 6 to 9
ft occasionally to 12 ft. 
.wednesday night...northwest winds to 30 kt. rain showers. waves 
5 to 8 ft occasionally to 10 ft. 
.thursday...northwest winds to 30 kt. chance of rain showers.
waves 4 to 7 ft occasionally to 9 ft subsiding to 4 to 6 ft
occasionally to 8 ft. 
.friday...west winds 10 to 15 kt increasing to 10 to 20 kt. waves
1 to 2 ft.  

$$

fzus63 kmkx 200742
glflm 
expires:202510201515;;441723

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
242 am cdt mon oct 20 2025

for waters beyond five nautical miles of shore on lake michigan.

waves are provided as a range of significant wave heights, which
is the average of the highest 1/3 of the wave, along with the
average height of the highest 10% of the waves which will
occasionally be encountered.

.synopsis...

southerly winds will increase rapidly this afternoon ahead of 
developing 29.4 inch low pressure in minnesota. said low will move
into lake superior tonight into tuesday, allowing winds to shift 
out of the west. winds will gradually turn northwesterly tuesday 
night as the aforementioned surface low migrates toward the 
ontario- quebec border. 

southerly gales are expected across the southern and central
portion of the lake from late this afternoon through late this
evening. there will then be a lull in the gales from late tonight
through tuesday morning, followed by northwest gales tuesday
afternoon through wednesday. a long duration gale warning has been
issued starting this afternoon to capture both gale events. 

winds will lighten through the end of the week as high 
pressure builds in from the northern great plains.


lmz080-567-669-671-673-675-777-779-868-870-872-874-876-878-201515-
lake michigan from michigan city in to st. joseph mi 5 nm
offshore to mid lake-
lake michigan from two rivers to sheboygan wi 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 pentwater to manistee mi 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 am cdt mon oct 20 2025

two rivers wi to manistee mi south...

...gale warning in effect from this afternoon through wednesday
evening...

.today...west winds 10 to 15 kt becoming southwest 10 to 20 kt
late this morning, then becoming south to 30 kt this afternoon.
waves 4 to 6 ft occasionally to 8 ft building to 8 to 11 ft
occasionally to 14 ft. 
.tonight...south gales to 35 kt veering to west to 30 kt. chance
of showers. waves 10 to 14 ft occasionally to 18 ft subsiding to
8 to 11 ft occasionally to 14 ft. 
.tuesday...west winds to 30 kt increasing to gales to 40 kt.
showers in the afternoon. waves 10 to 14 ft occasionally to
18 ft. 
.tuesday night...west gales to 40 kt. showers. waves 12 to 16 ft
occasionally to 21 ft. 
.wednesday...northwest gales to 35 kt. chance of showers in the
morning, then showers likely in the afternoon. waves 12 to 16 ft
occasionally to 21 ft. 
.wednesday night...northwest gales to 35 kt diminishing to 30 kt.
chance of rain showers. waves 10 to 14 ft occasionally to 18 ft. 
.thursday...northwest winds to 30 kt diminishing to 15 to 25 kt.
waves 8 to 12 ft occasionally to 16 ft subsiding to 7 to 10 ft
occasionally to 13 ft. 
.friday...west winds 10 to 15 kt becoming southwest. waves 2 to
4 ft.  

$$

fzus63 kmkx 200151
glflm 
expires:202510200930;;428189

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
851 pm cdt sun oct 19 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...

winds will continue to taper tonight as 29.9 inch high pressure 
builds in from the northern great plains. the weakening trend will
be short-lived, with southerly winds increasing rapidly monday 
afternoon ahead of developing 29.4 inch low pressure in 
minnesota. said low will move into lake superior monday night 
into tuesday, allowing winds to shift out of the west. winds will 
gradually turn northwesterly tuesday night as the aforementioned 
surface low migrates toward the ontario- quebec border. a few 
southerly gales are possible across all of lake michigan monday 
evening, with better potential for more widespread west- 
northwesterly gales tuesday afternoon through wednesday over the 
southern half of the lake. whether or not gale warnings will be 
needed monday evening remains uncertain, with trends being 
monitored through tonight. gale warnings will likely be needed 
across southern lake michigan tuesday afternoon into wednesday. 
periods of showers and embedded thunderstorms will accompany the 
approaching/passing area of low pressure monday night through 
thursday, with severe weather not anticipated at this time. winds 
will lighten through the end of the week as high pressure builds 
in from the northern great plains.


lmz261-362-364-366-563-565-567-868-200930-
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-
851 pm cdt sun oct 19 2025

sheboygan wi to pentwater mi north...

.rest of tonight...northwest winds to 30 kt diminishing to 10 to
20 kt. waves 5 to 8 ft occasionally to 10 ft subsiding to 4 to
6 ft occasionally to 8 ft. 
.monday...west winds 10 to 15 kt becoming southwest 10 to 20 kt
late in the morning, then increasing to 15 to 25 kt early in the
afternoon becoming south to 30 kt late. waves 2 to 4 ft building
to 7 to 10 ft occasionally to 13 ft. 
.monday night...south winds veering to west to 30 kt. a few
southerly gales to 35 kt possible during the evening. chance of 
showers in the evening, then showers overnight. waves 10 to 14 ft 
occasionally to 18 ft subsiding to 8 to 11 ft occasionally to 14 
ft. 
.tuesday...west winds to 30 kt increasing to gales to 35 kt.
chance of showers in the morning, then showers in the afternoon.
waves 6 to 9 ft occasionally to 12 ft building to 10 to 14 ft
occasionally to 18 ft. 
.tuesday night...west gales to 35 kt becoming northwest. rain
showers. waves 10 to 14 ft occasionally to 18 ft. 
.wednesday...northwest winds to 30 kt increasing to gales to
35 kt. rain showers. waves 10 to 14 ft occasionally to 18 ft. 
.wednesday night...northwest gales to 35 kt diminishing to 30 kt.
rain showers. waves 8 to 12 ft occasionally to 16 ft subsiding to
7 to 10 ft occasionally to 13 ft. 
.thursday...northwest winds to 30 kt. chance of rain showers.
waves 6 to 9 ft occasionally to 12 ft. 
.friday...northwest winds 10 to 20 kt. waves 1 to 3 ft.  

$$

fzus63 kmkx 200151
glflm 
expires:202510200930;;428190

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
851 pm cdt sun oct 19 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...

winds will continue to taper tonight as 29.9 inch high pressure 
builds in from the northern great plains. the weakening trend will
be short-lived, with southerly winds increasing rapidly monday 
afternoon ahead of developing 29.4 inch low pressure in 
minnesota. said low will move into lake superior monday night 
into tuesday, allowing winds to shift out of the west. winds will 
gradually turn northwesterly tuesday night as the aforementioned 
surface low migrates toward the ontario- quebec border. a few 
southerly gales are possible across all of lake michigan monday 
evening, with better potential for more widespread west- 
northwesterly gales tuesday afternoon through wednesday over the 
southern half of the lake. whether or not gale warnings will be 
needed monday evening remains uncertain, with trends being 
monitored through tonight. gale warnings will likely be needed 
across southern lake michigan tuesday afternoon into wednesday. 
periods of showers and embedded thunderstorms will accompany the 
approaching/passing area of low pressure monday night through 
thursday, with severe weather not anticipated at this time. winds 
will lighten through the end of the week as high pressure builds 
in from the northern great plains.


lmz080-669-671-673-675-777-779-870-872-874-876-878-200930-
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-
851 pm cdt sun oct 19 2025

sheboygan wi to pentwater mi south...

...gale warning in effect until 10 pm cdt this evening...

.rest of tonight...northwest winds to 30 kt becoming west 10 to
20 kt. waves 8 to 12 ft occasionally to 16 ft subsiding to 5 to
8 ft occasionally to 10 ft. 
.monday...west winds 10 to 15 kt becoming southwest 10 to 20 kt
late in the morning, then becoming south to 30 kt in the
afternoon. waves 4 to 6 ft occasionally to 8 ft building to 7 to
10 ft occasionally to 13 ft. 
.monday night...south winds veering to west to 30 kt. a few
southerly gales to 35 kt possible during the evening.
showers in the evening, then chance of showers overnight. waves
10 to 14 ft occasionally to 18 ft subsiding to 8 to 12 ft
occasionally to 16 ft. 
.tuesday...west winds to 30 kt increasing to gales to 40 kt in
the afternoon. chance of showers in the morning, then showers in
the afternoon. waves 7 to 10 ft occasionally to 13 ft building to
14 to 18 ft occasionally to 23 ft. 
.tuesday night...west gales to 40 kt becoming northwest. showers
in the evening, then chance of showers overnight. waves 15 to
20 ft occasionally to 26 ft. 
.wednesday...northwest gales to 40 kt. chance of showers in the
morning, then showers likely in the afternoon. waves 15 to 20 ft
occasionally to 26 ft. 
.wednesday night...northwest gales to 40 kt diminishing to 30 kt.
chance of rain showers. waves 14 to 18 ft occasionally to 23 ft
subsiding to 12 to 16 ft occasionally to 21 ft. 
.thursday...northwest winds to 30 kt. chance of rain showers.
waves 10 to 14 ft occasionally to 18 ft subsiding to 8 to 11 ft
occasionally to 14 ft. 
.friday...northwest winds 10 to 15 kt becoming west. waves 2 to
4 ft.  

$$

fzus63 kmqt 200801
glfls 
expires:202510202000;;442387

open lake forecast for lake superior
national weather service marquette mi
401 am edt mon oct 20 2025

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

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

.synopsis...

a 29.8 inch ridge moving across lake superior this morning leaves by 
this afternoon when a 29.4 inch low moves over minnesota before 
arriving over lake superior tuesday morning. the low then pivots 
away towards ontario tuesday night before arriving at the 
ontario/quebec line at 29.5 inches wednesday afternoon. as the low 
lifts across far northern quebec at 29.4 inches thursday, ridging of 
30.1 to 30.2 inches builds over the great plains, moving over lake 
superior by the end of the week and remaining over the great lakes 
region into the weekend.



lsz162-202000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 am edt mon oct 20 2025 /301 am cdt mon oct 20 2025/

.early this morning...south winds 5 to 15 knots. waves calm to
2 feet. 
.today...southeast winds 5 to 15 knots becoming east 15 to
25 knots in the afternoon, then becoming southeast 20 to 30 knots
late. showers likely by mid afternoon. waves building to 3 to
6 feet occasionally to 8 feet. 
.tonight...south winds 20 to 30 knots veering west after
midnight, then diminishing to 15 to 25 knots late. a chance of
showers. waves building to 4 to 7 feet occasionally to 9 feet,
then subsiding to 3 to 5 feet occasionally to 7 feet. 
.tuesday...west winds 15 to 25 knots veering northwest in the
afternoon, then increasing to 20 to 30 knots late. showers. waves
subsiding to 1 to 3 feet, then building to 3 to 5 feet
occasionally to 7 feet. 
.tuesday night...north winds 20 to 30 knots. showers. waves
building to 3 to 6 feet occasionally to 8 feet. 
.wednesday...northwest winds 20 to 30 knots diminishing to 15 to
25 knots by mid afternoon. showers likely. waves subsiding to
2 to 4 feet. 
.wednesday night...northwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. waves subsiding to 1 to 3 feet. 
.thursday...northwest winds 10 to 20 knots diminishing to 5 to
15 knots. waves subsiding to calm to 2 feet. 
.friday...south winds 5 to 15 knots backing southeast. waves calm
to 2 feet. 

$$

fzus63 kmqt 200801
glfls 
expires:202510202000;;442388

open lake forecast for lake superior
national weather service marquette mi
401 am edt mon oct 20 2025

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

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

.synopsis...

a 29.8 inch ridge moving across lake superior this morning leaves by 
this afternoon when a 29.4 inch low moves over minnesota before 
arriving over lake superior tuesday morning. the low then pivots 
away towards ontario tuesday night before arriving at the 
ontario/quebec line at 29.5 inches wednesday afternoon. as the low 
lifts across far northern quebec at 29.4 inches thursday, ridging of 
30.1 to 30.2 inches builds over the great plains, moving over lake 
superior by the end of the week and remaining over the great lakes 
region into the weekend.



lsz263-202000-
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-
401 am edt mon oct 20 2025

.early this morning...west winds 5 to 15 knots. waves 1 to 3 feet
subsiding to calm to 2 feet. 
.today...south winds 5 to 15 knots becoming southeast 10 to
20 knots in the afternoon, then increasing to 20 to 30 knots
late. a chance of showers by mid afternoon. waves building to
3 to 6 feet occasionally to 8 feet. 
.tonight...south winds 20 to 30 knots becoming southwest 15 to
25 knots after midnight, then veering west late. showers through
midnight, then a chance of showers after midnight. waves building
to 5 to 8 feet occasionally to 10 feet, then subsiding to 3 to
6 feet occasionally to 8 feet. 
.tuesday...west winds 10 to 20 knots increasing to 20 to 30 knots
in the afternoon, then veering north late. showers. waves
subsiding to 3 to 5 feet occasionally to 7 feet, then building to
4 to 7 feet occasionally to 9 feet. 
.tuesday night...north winds 20 to 30 knots. rain showers. waves
building to 5 to 8 feet occasionally to 10 feet. 
.wednesday...north winds 15 to 25 knots backing northwest by mid
afternoon. rain showers. waves subsiding to 3 to 6 feet
occasionally to 8 feet. 
.wednesday night...northwest winds 15 to 25 knots. a chance of
rain showers. waves subsiding to 3 to 5 feet occasionally to
7 feet. 
.thursday...northwest winds 15 to 25 knots diminishing to 10 to
20 knots. waves subsiding to calm to 2 feet. 
.friday...west winds 5 to 15 knots backing southeast. waves calm
to 2 feet. 

$$

fzus63 kmqt 200801
glfls 
expires:202510202000;;442389

open lake forecast for lake superior
national weather service marquette mi
401 am edt mon oct 20 2025

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

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

.synopsis...

a 29.8 inch ridge moving across lake superior this morning leaves by 
this afternoon when a 29.4 inch low moves over minnesota before 
arriving over lake superior tuesday morning. the low then pivots 
away towards ontario tuesday night before arriving at the 
ontario/quebec line at 29.5 inches wednesday afternoon. as the low 
lifts across far northern quebec at 29.4 inches thursday, ridging of 
30.1 to 30.2 inches builds over the great plains, moving over lake 
superior by the end of the week and remaining over the great lakes 
region into the weekend.



lsz264-202000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
401 am edt mon oct 20 2025

.early this morning...northwest winds 5 to 15 knots. waves 2 to
4 feet subsiding to 1 to 3 feet. 
.today...southwest winds 5 to 15 knots becoming south 10 to
20 knots in the afternoon, then becoming southeast 20 to 30 knots
late. a slight chance of showers by mid afternoon. waves
subsiding to calm to 2 feet, then building to 3 to 6 feet
occasionally to 8 feet. 
.tonight...southeast winds 20 to 30 knots becoming southwest
15 to 25 knots late. showers. waves building to 5 to 8 feet
occasionally to 10 feet. 
.tuesday...west winds 15 to 25 knots veering northeast in the
afternoon, then backing north late. showers. waves subsiding to
4 to 8 feet occasionally to 10 feet. 
.tuesday night...north winds 20 to 30 knots. showers. waves
building to 5 to 8 feet occasionally to 10 feet. 
.wednesday...north winds 15 to 25 knots. showers. waves subsiding
to 3 to 6 feet occasionally to 8 feet, then building to 4 to
7 feet occasionally to 9 feet. 
.wednesday night...north winds 15 to 25 knots becoming northwest
20 to 30 knots after midnight. rain showers likely through
midnight. waves subsiding to 3 to 6 feet occasionally to 8 feet. 
.thursday...northwest winds 20 to 30 knots diminishing to 10 to
20 knots. waves building to 4 to 7 feet occasionally to 9 feet,
then subsiding to calm to 2 feet. 
.friday...west winds 5 to 15 knots backing southeast. waves calm
to 2 feet. 

$$

fzus63 kmqt 200801
glfls 
expires:202510202000;;442390

open lake forecast for lake superior
national weather service marquette mi
401 am edt mon oct 20 2025

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

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

.synopsis...

a 29.8 inch ridge moving across lake superior this morning leaves by 
this afternoon when a 29.4 inch low moves over minnesota before 
arriving over lake superior tuesday morning. the low then pivots 
away towards ontario tuesday night before arriving at the 
ontario/quebec line at 29.5 inches wednesday afternoon. as the low 
lifts across far northern quebec at 29.4 inches thursday, ridging of 
30.1 to 30.2 inches builds over the great plains, moving over lake 
superior by the end of the week and remaining over the great lakes 
region into the weekend.



lsz265-202000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
401 am edt mon oct 20 2025

.early this morning...west winds 10 to 20 knots. waves 1 to
3 feet subsiding to calm to 2 feet. 
.today...southwest winds 10 to 20 knots backing south in the
afternoon, then becoming southeast 20 to 30 knots late. a slight
chance of showers by mid afternoon. waves building to 3 to 6 feet
occasionally to 8 feet. 
.tonight...south winds to 30 knots with a few gale force gusts to
35 knots possible diminishing to 15 to 25 knots after midnight,
then veering west late. a chance of showers through midnight,
then showers after midnight. waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet. 
.tuesday...west winds 20 to 30 knots veering northwest late.
showers. waves subsiding to 2 to 4 feet, then building to 3 to
6 feet occasionally to 8 feet. 
.tuesday night...north winds 20 to 30 knots. showers. waves
subsiding to 3 to 6 feet occasionally to 8 feet. 
.wednesday...north winds 20 to 30 knots. showers. waves building
to 4 to 7 feet occasionally to 9 feet. 
.wednesday night...northwest winds 20 to 30 knots. rain showers
through midnight, then a chance of rain showers after midnight.
waves subsiding to 3 to 6 feet occasionally to 8 feet. 
.thursday...northwest winds 20 to 30 knots diminishing to 10 to
20 knots. a chance of rain showers. waves subsiding to calm to
2 feet. 
.friday...west winds 10 to 20 knots backing south. waves calm to
2 feet. 

$$

fzus63 kmqt 200801
glfls 
expires:202510202000;;442391

open lake forecast for lake superior
national weather service marquette mi
401 am edt mon oct 20 2025

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

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

.synopsis...

a 29.8 inch ridge moving across lake superior this morning leaves by 
this afternoon when a 29.4 inch low moves over minnesota before 
arriving over lake superior tuesday morning. the low then pivots 
away towards ontario tuesday night before arriving at the 
ontario/quebec line at 29.5 inches wednesday afternoon. as the low 
lifts across far northern quebec at 29.4 inches thursday, ridging of 
30.1 to 30.2 inches builds over the great plains, moving over lake 
superior by the end of the week and remaining over the great lakes 
region into the weekend.



lsz266-202000-
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-
401 am edt mon oct 20 2025

.early this morning...northwest winds 10 to 20 knots. waves 3 to
6 feet occasionally to 8 feet. 
.today...west winds 10 to 20 knots backing south in the
afternoon, then becoming southeast 20 to 30 knots late. waves
subsiding to calm to 2 feet, then building to 3 to 5 feet
occasionally to 7 feet. 
.tonight...southeast winds 20 to 30 knots diminishing to 15 to
25 knots late. a chance of showers through midnight, then showers
after midnight. waves building to 5 to 8 feet occasionally to
10 feet. 
.tuesday...west winds 15 to 25 knots veering north late. showers.
waves subsiding to 4 to 8 feet occasionally to 10 feet. 
.tuesday night...north winds 15 to 25 knots increasing to 20 to
30 knots after midnight. showers. waves building to 4 to 7 feet
occasionally to 9 feet. 
.wednesday...north winds 20 to 30 knots. showers. waves building
to 5 to 8 feet occasionally to 10 feet. 
.wednesday night...north winds 20 to 30 knots backing northwest
after midnight. rain showers. waves subsiding to 4 to 7 feet
occasionally to 9 feet. 
.thursday...northwest winds 20 to 30 knots diminishing to 15 to
25 knots. rain showers likely, then a chance of rain showers.
waves subsiding to 2 to 4 feet. 
.friday...west winds 10 to 20 knots backing south. a chance of
rain showers. waves subsiding to calm to 2 feet. 

$$

fzus63 kmqt 200801
glfls 
expires:202510202000;;442392

open lake forecast for lake superior
national weather service marquette mi
401 am edt mon oct 20 2025

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

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

.synopsis...

a 29.8 inch ridge moving across lake superior this morning leaves by 
this afternoon when a 29.4 inch low moves over minnesota before 
arriving over lake superior tuesday morning. the low then pivots 
away towards ontario tuesday night before arriving at the 
ontario/quebec line at 29.5 inches wednesday afternoon. as the low 
lifts across far northern quebec at 29.4 inches thursday, ridging of 
30.1 to 30.2 inches builds over the great plains, moving over lake 
superior by the end of the week and remaining over the great lakes 
region into the weekend.



lsz267-202000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
401 am edt mon oct 20 2025

.early this morning...northwest winds 10 to 20 knots. waves 3 to
6 feet occasionally to 8 feet. 
.today...west winds 10 to 20 knots backing southwest in the
afternoon, then backing southeast late. waves subsiding to calm
to 2 feet, then building to 1 to 3 feet. 
.tonight...southeast winds 15 to 25 knots increasing to 30 knots
with a few gale force gusts to 35 knots possible after midnight,
then diminishing to 20 to 30 knots late. a slight chance of
showers through midnight, then showers after midnight. waves
building to 4 to 7 feet occasionally to 9 feet. 
.tuesday...southeast winds 15 to 25 knots veering southwest in
the afternoon. showers. waves subsiding to 3 to 6 feet
occasionally to 8 feet, then building to 4 to 7 feet occasionally
to 9 feet. 
.tuesday night...west winds 10 to 20 knots veering north after
midnight. showers. waves subsiding to 2 to 4 feet. 
.wednesday...north winds 15 to 25 knots increasing to 20 to
30 knots by mid afternoon. showers. waves building to 4 to 7 feet
occasionally to 9 feet. 
.wednesday night...north winds 20 to 30 knots. rain showers.
waves 4 to 7 feet occasionally to 9 feet. 
.thursday...northwest winds 20 to 30 knots diminishing to 15 to
25 knots. rain showers likely. waves subsiding to 2 to 4 feet. 
.friday...northwest winds 10 to 20 knots backing southwest. a
chance of showers. waves subsiding to calm to 2 feet. 

$$