fzus63 kdtx 240204
glflh 
expires:202610241015;;081533

open lake forecast for lake huron
national weather service detroit/pontiac mi
1004 pm edt fri oct 23 2026

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, 30.50 inches, broadens over new england
over the weekend, sustaining an extended period of tranquil and
mainly dry conditions over the central greak lakes into next
week. a cold front will move through on sunday, with a mainly dry
passage.


lhz361-362-241015-
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-
1004 pm edt fri oct 23 2026

.rest of tonight...southeast winds 5 to 10 knots. waves 2 feet or
less. 
.saturday...south winds 5 to 10 knots increasing to 10 to
15 knots in the afternoon. waves 1 to 3 feet. 
.saturday night...south winds 10 to 15 knots. waves 2 to 4 feet. 
.sunday...south winds 10 to 15 knots decreasing to 5 to 10 knots
early in the afternoon. waves 2 to 4 feet. 
.sunday night...southwest winds 5 to 10 knots veering to the west
by midnight...then becoming northwest 10 to 15 knots after
midnight. waves 1 to 3 feet. 
.monday...northwest winds 5 to 10 knots becoming north 10 to
15 knots late in the afternoon. waves 1 to 3 feet. 
.tuesday...northeast winds 10 to 15 knots becoming east 5 to
10 knots. waves 1 to 3 feet. 
.wednesday...southeast winds 5 to 10 knots increasing to 10 to
15 knots. waves 1 to 3 feet building to 2 to 4 feet . 


$$

fzus63 kdtx 240204
glflh 
expires:202610241015;;081534

open lake forecast for lake huron
national weather service detroit/pontiac mi
1004 pm edt fri oct 23 2026

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, 30.50 inches, broadens over new england
over the weekend, sustaining an extended period of tranquil and
mainly dry conditions over the central greak lakes into next
week. a cold front will move through on sunday, with a mainly dry
passage.


lhz363-462>464-241015-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
lake huron from port austin to harbor beach beyond 5nm off shore-
lake huron from harbor beach to port sanilac beyond 5nm off shore-
lake huron from port sanilac to port huron beyond 5nm off shore-
1004 pm edt fri oct 23 2026

.rest of tonight...southeast winds 5 to 10 knots increasing to
10 to 15 knots after midnight. waves 1 to 3 feet. 
.saturday...southeast winds 5 to 10 knots. waves 2 feet or less. 
.saturday night...southeast winds 5 to 10 knots becoming south
10 to 15 knots in the late evening and overnight. waves 1 to
3 feet. 
.sunday...south winds 10 to 15 knots. waves 1 to 3 feet. 
.sunday night...south winds 10 to 15 knots veering to the
northwest after midnight. waves 1 to 3 feet. 
.monday...north winds 10 to 15 knots. waves 1 to 3 feet building
to 2 to 4 feet late in the afternoon. 
.tuesday...northeast winds 10 to 15 knots becoming east 5 to
10 knots. waves 1 to 3 feet. 
.wednesday...southeast winds 10 to 15 knots becoming south 15 to
20 knots by midnight. waves 1 to 3 feet building to 2 to 4 feet
by midnight. 


$$

fzus63 kmkx 240201
glflm 
expires:202610240930;;081430

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
901 pm cdt fri oct 23 2026

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...

high pressure around 30.4 inches will sag south from quebec into
the northeastern conus overnight into saturday morning. 
meanwhile, 29.4 inch low pressure tracks from northeast montana
into manitoba. positioning of these surface features is resulting
in generally south to southeasterly winds across the waters. areas
of fog, some of which have been dense, will likely continue
through the overnight hours over the northern two thirds of the
lake, gradually dissipating post-dawn saturday morning as winds 
turn due south and accelerate. that being said, satellite
signatures and ship observations currently confirm that the worst
of the fog is in the eastern and western nearshore zones, rather
than the open waters. 

the aforementioned area of low pressure will continue on toward 
the hudson bay by saturday evening as it deepens to near 29.2 
inches. progression of the low will maintain generally southerly 
flow across the waters, with gusts between 25-30 knots possible 
over the northern half of the lake saturday afternoon and night. 
can't rule out an isolated gust approaching gale force during this
time frame, with conditions not expected to be widespread enough 
for headlines.

winds will trend southwesterly while steadily weakening ahead of an 
approaching cold front on sunday. currently expecting the front to 
move south across lake michigan late sunday afternoon into sunday 
evening, bringing a breezy northeast wind shift. gales are not 
anticipated during the frontal passage, with any isolated rain 
showers expected to remain over the far northern part of the lake. 
breezy northeast winds will continue through monday as 30.7 inch 
high pressure slides into ontario from the canadian great plains. 
winds will trend easterly and eventually southerly tuesday into 
the middle of next week as the aforementioned high shifts into the
northeastern united states. widespread rain chances return 
wednesday into friday.


lmz261-362-364-366-563-565-567-868-240930-
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-
901 pm cdt fri oct 23 2026

sheboygan wi to pentwater mi north...

.rest of tonight...south winds 5 to 10 kt increasing to 10 to
15 kt. areas of fog. a few areas could observe dense fog, 
particularly towards the eastern and western nearshore zones. 
waves 1 to 3 ft.
.saturday...south winds 10 to 20 kt increasing to 30 kt. patchy
fog in the morning. waves 1 to 3 ft building to 4 to 6 ft
occasionally to 8 ft. 
.saturday night...south winds to 30 kt. waves 4 to 6 ft
occasionally to 8 ft. 
.sunday...southwest winds 15 to 25 kt becoming west 10 to 20 kt.
waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to 4 ft. 
.sunday night...north winds 10 to 15 kt increasing to 10 to
20 kt. waves 2 to 4 ft. 
.monday...north winds 10 to 20 kt. waves 3 to 5 ft building to
4 to 6 ft occasionally to 8 ft. 
.monday night...northeast winds 15 to 25 kt diminishing to 10 to
20 kt. waves 4 to 6 ft occasionally to 8 ft. 
.tuesday...east winds 10 to 20 kt. waves 2 to 4 ft. 
.wednesday...south winds 10 to 20 kt increasing to 15 to 25 kt.
waves 4 to 6 ft occasionally to 8 ft.  

$$

fzus63 kmkx 240201
glflm 
expires:202610240930;;081431

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
901 pm cdt fri oct 23 2026

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...

high pressure around 30.4 inches will sag south from quebec into
the northeastern conus overnight into saturday morning. 
meanwhile, 29.4 inch low pressure tracks from northeast montana
into manitoba. positioning of these surface features is resulting
in generally south to southeasterly winds across the waters. areas
of fog, some of which have been dense, will likely continue
through the overnight hours over the northern two thirds of the
lake, gradually dissipating post-dawn saturday morning as winds 
turn due south and accelerate. that being said, satellite
signatures and ship observations currently confirm that the worst
of the fog is in the eastern and western nearshore zones, rather
than the open waters. 

the aforementioned area of low pressure will continue on toward 
the hudson bay by saturday evening as it deepens to near 29.2 
inches. progression of the low will maintain generally southerly 
flow across the waters, with gusts between 25-30 knots possible 
over the northern half of the lake saturday afternoon and night. 
can't rule out an isolated gust approaching gale force during this
time frame, with conditions not expected to be widespread enough 
for headlines.

winds will trend southwesterly while steadily weakening ahead of an 
approaching cold front on sunday. currently expecting the front to 
move south across lake michigan late sunday afternoon into sunday 
evening, bringing a breezy northeast wind shift. gales are not 
anticipated during the frontal passage, with any isolated rain 
showers expected to remain over the far northern part of the lake. 
breezy northeast winds will continue through monday as 30.7 inch 
high pressure slides into ontario from the canadian great plains. 
winds will trend easterly and eventually southerly tuesday into 
the middle of next week as the aforementioned high shifts into the
northeastern united states. widespread rain chances return 
wednesday into friday.


lmz080-669-671-673-675-777-779-870-872-874-876-878-240930-
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-
901 pm cdt fri oct 23 2026

sheboygan wi to pentwater mi south...

.rest of tonight...southeast winds 5 to 10 kt becoming south
10 to 15 kt. patchy fog. waves 1 to 3 ft. 
.saturday...south winds 10 to 20 kt increasing to 15 to 25 kt.
waves 2 to 4 ft building to 4 to 6 ft occasionally to 8 ft. 
.saturday night...south winds 15 to 25 kt diminishing to 10 to
20 kt. waves 4 to 6 ft occasionally to 8 ft. 
.sunday...south winds 10 to 20 kt. waves 3 to 5 ft. 
.sunday night...southwest winds 10 to 15 kt veering to north
10 to 20 kt. waves 1 to 3 ft building to 2 to 4 ft. 
.monday...northeast winds 10 to 20 kt increasing to 15 to 25 kt.
waves 4 to 6 ft occasionally to 8 ft building to 4 to 7 ft
occasionally to 9 ft. 
.monday night...northeast winds 15 to 25 kt diminishing to 10 to
20 kt. waves 5 to 8 ft occasionally to 10 ft subsiding to 4 to
7 ft occasionally to 9 ft. 
.tuesday...east winds 10 to 20 kt. waves 3 to 5 ft. 
.wednesday...south winds 10 to 20 kt increasing to 15 to 25 kt.
waves 4 to 6 ft occasionally to 8 ft.  

$$

fzus63 kmqt 240201
glfls 
expires:202610240800;;081383

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt fri oct 23 2026

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...

30.5 inch high pressure over the st. lawrence seaway is extending a 
30.2 inch ridge over lake superior the rest of tonight. by saturday 
afternoon, a 29.2 inch low over northern manitoba drags a 30.1 inch 
trough over the west half of lake superior. the trough remains over 
the lake until saturday night. high pressure of at least 30.6 inches 
over the canadian prairies on sunday and monday pushes ridging of at 
least 30.4 inches over the upper great lakes on sunday. the ridging 
intensifies to 30.6 inches monday night into tuesday morning as the 
high's center moves overhead. the high retreats east into new 
england by wednesday morning. a 29.9 inch low over the northern 
plains early wednesday morning then moves through western lake 
superior throughout the day on wednesday. 




lsz266-240800-
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-
1000 pm edt fri oct 23 2026

.rest of tonight...south winds 15 to 25 knots. patchy fog after
midnight. waves 2 to 4 feet. 
.saturday...south winds 20 to 30 knots. waves building to 4 to
8 feet occasionally to 10 feet. 
.saturday night...south winds 20 to 30 knots becoming southwest
15 to 25 knots after midnight, then veering west late. a chance
of showers. waves subsiding to 2 to 4 feet. 
.sunday...west winds 15 to 25 knots diminishing to 10 to 20 knots
by mid afternoon. a chance of showers through early afternoon.
waves subsiding to 1 to 3 feet, then building to 2 to 4 feet. 
.sunday night...northwest winds 15 to 25 knots veering north
after midnight. waves 2 to 4 feet. 
.monday...north winds 10 to 20 knots. waves subsiding to calm to
2 feet. 
.monday night...north winds 10 to 20 knots becoming east 5 to
15 knots after midnight. waves calm to 2 feet. 
.tuesday...southeast winds 5 to 15 knots increasing to 10 to
20 knots. a chance of rain showers. waves building to 2 to
4 feet. 
.wednesday...south winds 20 to 30 knots veering southwest. a
chance of showers. waves building to 3 to 6 feet occasionally to
8 feet. 

$$

fzus63 kmqt 240201
glfls 
expires:202610240800;;081379

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt fri oct 23 2026

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...

30.5 inch high pressure over the st. lawrence seaway is extending a 
30.2 inch ridge over lake superior the rest of tonight. by saturday 
afternoon, a 29.2 inch low over northern manitoba drags a 30.1 inch 
trough over the west half of lake superior. the trough remains over 
the lake until saturday night. high pressure of at least 30.6 inches 
over the canadian prairies on sunday and monday pushes ridging of at 
least 30.4 inches over the upper great lakes on sunday. the ridging 
intensifies to 30.6 inches monday night into tuesday morning as the 
high's center moves overhead. the high retreats east into new 
england by wednesday morning. a 29.9 inch low over the northern 
plains early wednesday morning then moves through western lake 
superior throughout the day on wednesday. 




lsz162-240800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 pm edt fri oct 23 2026 /900 pm cdt fri oct 23 2026/

.rest of tonight...east winds 5 to 15 knots becoming southeast
10 to 20 knots late. patchy fog. a slight chance of showers.
waves calm to 2 feet building to 1 to 3 feet. 
.saturday...south winds 15 to 25 knots veering southwest late. a
chance of showers by mid afternoon. waves building to 2 to
4 feet, then subsiding to 1 to 3 feet. 
.saturday night...west winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. a chance of showers through midnight.
waves subsiding to calm to 2 feet. 
.sunday...west winds 10 to 20 knots. waves building to 1 to
3 feet, then subsiding to calm to 2 feet. 
.sunday night...northwest winds 10 to 20 knots veering north
after midnight. waves calm to 2 feet. 
.monday...north winds 10 to 20 knots becoming east 5 to 15 knots
by mid afternoon. waves calm to 2 feet. 
.monday night...east winds 5 to 15 knots increasing to 10 to
20 knots after midnight. waves calm to 2 feet. 
.tuesday...east winds 10 to 20 knots. a chance of rain showers.
waves calm to 2 feet. 
.wednesday...south winds 10 to 20 knots becoming southwest 20 to
30 knots. a chance of showers. waves building to 3 to 5 feet
occasionally to 7 feet. 

$$

fzus63 kmqt 240201
glfls 
expires:202610240800;;081384

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt fri oct 23 2026

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...

30.5 inch high pressure over the st. lawrence seaway is extending a 
30.2 inch ridge over lake superior the rest of tonight. by saturday 
afternoon, a 29.2 inch low over northern manitoba drags a 30.1 inch 
trough over the west half of lake superior. the trough remains over 
the lake until saturday night. high pressure of at least 30.6 inches 
over the canadian prairies on sunday and monday pushes ridging of at 
least 30.4 inches over the upper great lakes on sunday. the ridging 
intensifies to 30.6 inches monday night into tuesday morning as the 
high's center moves overhead. the high retreats east into new 
england by wednesday morning. a 29.9 inch low over the northern 
plains early wednesday morning then moves through western lake 
superior throughout the day on wednesday. 




lsz267-240800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
1000 pm edt fri oct 23 2026

.rest of tonight...south winds 15 to 25 knots. patchy fog after
midnight. waves 1 to 3 feet. 
.saturday...south winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon. waves building to 3 to 5 feet
occasionally to 7 feet. 
.saturday night...south winds 20 to 30 knots becoming southwest
15 to 25 knots late. a chance of showers. waves building to 3 to
6 feet occasionally to 8 feet, then subsiding to 2 to 4 feet. 
.sunday...west winds 10 to 20 knots. a chance of showers. waves
subsiding to 1 to 3 feet. 
.sunday night...northwest winds 15 to 25 knots veering north
after midnight. waves building to 2 to 4 feet. 
.monday...north winds 10 to 20 knots. waves subsiding to 1 to
3 feet. 
.monday night...north winds 10 to 20 knots veering east after
midnight. waves subsiding to calm to 2 feet. 
.tuesday...southeast winds 10 to 20 knots. a chance of rain
showers. waves building to 2 to 4 feet. 
.wednesday...south winds 20 to 30 knots. a chance of showers.
waves building to 3 to 6 feet occasionally to 8 feet. 

$$

fzus63 kmqt 240201
glfls 
expires:202610240800;;081380

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt fri oct 23 2026

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...

30.5 inch high pressure over the st. lawrence seaway is extending a 
30.2 inch ridge over lake superior the rest of tonight. by saturday 
afternoon, a 29.2 inch low over northern manitoba drags a 30.1 inch 
trough over the west half of lake superior. the trough remains over 
the lake until saturday night. high pressure of at least 30.6 inches 
over the canadian prairies on sunday and monday pushes ridging of at 
least 30.4 inches over the upper great lakes on sunday. the ridging 
intensifies to 30.6 inches monday night into tuesday morning as the 
high's center moves overhead. the high retreats east into new 
england by wednesday morning. a 29.9 inch low over the northern 
plains early wednesday morning then moves through western lake 
superior throughout the day on wednesday. 




lsz263-240800-
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-
1000 pm edt fri oct 23 2026

.rest of tonight...south winds 5 to 15 knots increasing to 10 to
20 knots after midnight. patchy dense fog. a slight chance of
showers after midnight. waves calm to 2 feet building to 2 to
4 feet. 
.saturday...south winds 15 to 25 knots becoming southwest 10 to
20 knots late. a chance of showers by mid afternoon. waves
building to 3 to 5 feet occasionally to 7 feet, then subsiding to
2 to 4 feet. 
.saturday night...southwest winds 15 to 25 knots becoming west
10 to 20 knots after midnight, then diminishing to 5 to 15 knots
late. a chance of showers through midnight. waves subsiding to
1 to 3 feet. 
.sunday...west winds 10 to 20 knots. waves building to 2 to
4 feet. 
.sunday night...northwest winds 10 to 20 knots becoming north
5 to 15 knots after midnight. waves subsiding to 1 to 3 feet. 
.monday...north winds 5 to 15 knots veering northeast by mid
afternoon. waves subsiding to calm to 2 feet. 
.monday night...northeast winds 5 to 15 knots veering east after
midnight. waves calm to 2 feet. 
.tuesday...east winds 5 to 15 knots veering southeast. a chance
of rain showers. waves calm to 2 feet. 
.wednesday...south winds 10 to 20 knots becoming southwest gales
to 35 knots. a chance of rain showers. waves building to 4 to
7 feet occasionally to 9 feet. 

$$

fzus63 kmqt 240201
glfls 
expires:202610240800;;081381

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt fri oct 23 2026

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...

30.5 inch high pressure over the st. lawrence seaway is extending a 
30.2 inch ridge over lake superior the rest of tonight. by saturday 
afternoon, a 29.2 inch low over northern manitoba drags a 30.1 inch 
trough over the west half of lake superior. the trough remains over 
the lake until saturday night. high pressure of at least 30.6 inches 
over the canadian prairies on sunday and monday pushes ridging of at 
least 30.4 inches over the upper great lakes on sunday. the ridging 
intensifies to 30.6 inches monday night into tuesday morning as the 
high's center moves overhead. the high retreats east into new 
england by wednesday morning. a 29.9 inch low over the northern 
plains early wednesday morning then moves through western lake 
superior throughout the day on wednesday. 




lsz264-240800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
1000 pm edt fri oct 23 2026

.rest of tonight...south winds 5 to 15 knots increasing to 10 to
20 knots late. a slight chance of showers after midnight. waves
1 to 3 feet building to 2 to 4 feet. 
.saturday...south winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon, 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 6 feet
occasionally to 8 feet. 
.saturday night...southwest winds 10 to 20 knots veering west
after midnight, then diminishing to 5 to 15 knots late. a chance
of showers through midnight. waves subsiding to 2 to 4 feet. 
.sunday...west winds 10 to 20 knots increasing to 15 to 25 knots
by mid afternoon. waves subsiding to 1 to 3 feet, then building
to 2 to 4 feet. 
.sunday night...northwest winds 10 to 20 knots veering north
after midnight. waves subsiding to 1 to 3 feet. 
.monday...north winds 5 to 15 knots. waves subsiding to calm to
2 feet. 
.monday night...northeast winds 5 to 15 knots veering east after
midnight. waves calm to 2 feet. 
.tuesday...southeast winds 5 to 15 knots increasing to 10 to
20 knots. a chance of rain showers. waves building to 1 to
3 feet. 
.wednesday...south winds 10 to 20 knots becoming southwest gales
to 35 knots. a chance of showers. waves building to 4 to 7 feet
occasionally to 9 feet. 

$$

fzus63 kmqt 240201
glfls 
expires:202610240800;;081382

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt fri oct 23 2026

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...

30.5 inch high pressure over the st. lawrence seaway is extending a 
30.2 inch ridge over lake superior the rest of tonight. by saturday 
afternoon, a 29.2 inch low over northern manitoba drags a 30.1 inch 
trough over the west half of lake superior. the trough remains over 
the lake until saturday night. high pressure of at least 30.6 inches 
over the canadian prairies on sunday and monday pushes ridging of at 
least 30.4 inches over the upper great lakes on sunday. the ridging 
intensifies to 30.6 inches monday night into tuesday morning as the 
high's center moves overhead. the high retreats east into new 
england by wednesday morning. a 29.9 inch low over the northern 
plains early wednesday morning then moves through western lake 
superior throughout the day on wednesday. 




lsz265-240800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
1000 pm edt fri oct 23 2026

.rest of tonight...south winds 15 to 25 knots. waves 1 to 3 feet.
.saturday...south winds 20 to 30 knots. waves building to 3 to
6 feet occasionally to 8 feet. 
.saturday night...south winds 20 to 30 knots becoming southwest
15 to 25 knots after midnight, then veering west late. a slight
chance of showers. waves subsiding to calm to 2 feet. 
.sunday...west winds 15 to 25 knots. a slight chance of showers
through early afternoon. waves building to 1 to 3 feet. 
.sunday night...northwest winds 15 to 25 knots veering north
after midnight. waves 1 to 3 feet. 
.monday...north winds 10 to 20 knots. waves subsiding to calm to
2 feet. 
.monday night...northeast winds 10 to 20 knots veering east after
midnight. waves calm to 2 feet. 
.tuesday...southeast winds 10 to 20 knots increasing to 15 to
25 knots. a chance of showers. waves building to 1 to 3 feet. 
.wednesday...south winds 15 to 25 knots becoming southwest gales
to 35 knots. a chance of showers. waves building to 3 to 5 feet
occasionally to 7 feet. 

$$