fzus63 kdtx 231959
glflh 
expires:202610240400;;068190

open lake forecast for lake huron
national weather service detroit/pontiac mi
359 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, over quebec migrates
south into new england to close out the week, sustaining an
extended period of tranquil and mainly dry conditions into next
week.


lhz361-362-240400-
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-
359 pm edt fri oct 23 2026

.tonight...southeast winds 5 to 10 knots veering to the south
early in the morning. 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 231959
glflh 
expires:202610240400;;068191

open lake forecast for lake huron
national weather service detroit/pontiac mi
359 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, over quebec migrates
south into new england to close out the week, sustaining an
extended period of tranquil and mainly dry conditions into next
week.


lhz363-462>464-240400-
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-
359 pm edt fri oct 23 2026

.tonight...east winds 5 to 10 knots becoming southeast 10 to
15 knots after midnight. waves 2 feet or less. 
.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 231912
glflm 
expires:202610240315;;067080

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
212 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...

30.4 inch high pressure is centered over quebec this afternoon, 
with 29.4 inch low pressure positioned over northeastern montana.
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 linger through the first half of 
the afternoon. based on observational trends, have maintained the 
marine dense fog advisory across portions of the waters through 3 
pm cdt, and will be monitoring for additional adjustments. 
expecting fog to fully dissipate by early evening at the latest. 
aforementioned area of low pressure will progress toward lake 
winnipeg tonight, continuing 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.


lmz080-777-779-870-872-874-876-878-240315-
lake michigan from michigan city in to st. joseph mi 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-
212 pm cdt fri oct 23 2026

winthrop harbor il to south haven mi south...

.tonight...southeast winds 5 to 10 kt increasing to 10 to 15 kt
late this evening, then becoming southeast 10 to 15 kt after
midnight becoming south late. patchy fog overnight. waves 1 to
3 ft. 
.saturday...south winds 10 to 20 kt increasing to 15 to 25 kt.
waves 3 to 5 ft. 
.saturday night...south winds 10 to 20 kt. waves 3 to 5 ft. 
.sunday...south winds 10 to 20 kt. waves 2 to 4 ft. 
.sunday night...southwest winds 10 to 15 kt veering to northwest
10 to 20 kt. waves 1 to 3 ft. 
.monday...northeast winds 10 to 20 kt becoming north. waves 3 to
5 ft. 
.monday night...northeast winds 15 to 25 kt becoming east 10 to
20 kt. waves 3 to 5 ft. 
.tuesday...east winds 10 to 20 kt. waves 3 to 5 ft subsiding to
2 to 4 ft. 
.wednesday...south winds 10 to 20 kt. waves 3 to 5 ft.  

$$

fzus63 kmkx 231912
glflm 
expires:202610240315;;067078

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
212 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...

30.4 inch high pressure is centered over quebec this afternoon, 
with 29.4 inch low pressure positioned over northeastern montana.
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 linger through the first half of 
the afternoon. based on observational trends, have maintained the 
marine dense fog advisory across portions of the waters through 3 
pm cdt, and will be monitoring for additional adjustments. 
expecting fog to fully dissipate by early evening at the latest. 
aforementioned area of low pressure will progress toward lake 
winnipeg tonight, continuing 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.


lmz261-362-364-366-563-565-567-868-240315-
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-
212 pm cdt fri oct 23 2026

sheboygan wi to pentwater mi north...

...dense fog advisory in effect until 3 pm cdt this afternoon...

.tonight...south winds 10 to 15 kt. patchy fog. waves 1 to 3 ft. 
.saturday...south winds 10 to 20 kt increasing to 30 kt. patchy
fog in the morning. waves 2 to 4 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 3 to 5 ft subsiding to 2 to 4 ft. 
.sunday night...north winds 10 to 15 kt increasing to 10 to
20 kt. waves 1 to 3 ft. 
.monday...north winds 10 to 20 kt. waves 3 to 5 ft. 
.monday night...northeast winds 15 to 25 kt diminishing to 10 to
20 kt. waves 3 to 5 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 3 to 5 ft.  

$$

fzus63 kmkx 231912
glflm 
expires:202610240315;;067079

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
212 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...

30.4 inch high pressure is centered over quebec this afternoon, 
with 29.4 inch low pressure positioned over northeastern montana.
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 linger through the first half of 
the afternoon. based on observational trends, have maintained the 
marine dense fog advisory across portions of the waters through 3 
pm cdt, and will be monitoring for additional adjustments. 
expecting fog to fully dissipate by early evening at the latest. 
aforementioned area of low pressure will progress toward lake 
winnipeg tonight, continuing 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.


lmz669-671-673-675-240315-
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-
212 pm cdt fri oct 23 2026

sheboygan wi to pentwater mi south to winthrop harbor il to south
haven mi...

...dense fog advisory in effect until 3 pm cdt this afternoon...

.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 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 subsiding to 2 to
4 ft. 
.sunday...south winds 10 to 20 kt. waves 2 to 4 ft. 
.sunday night...southwest winds 10 to 15 kt veering to north
10 to 20 kt. waves 1 to 3 ft. 
.monday...northeast winds 10 to 20 kt increasing to 15 to 25 kt.
waves 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 3 to 5 ft. 
.wednesday...south winds 10 to 20 kt increasing to 15 to 25 kt.
waves 3 to 5 ft.  

$$

fzus63 kmqt 232001
glfls 
expires:202610240800;;068325

open lake forecast for lake superior
national weather service marquette mi
400 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. 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. 




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-
400 pm edt fri oct 23 2026

.late this afternoon...south winds 10 to 20 knots. waves 1 to
3 feet. 
.tonight...south winds 10 to 20 knots increasing to 15 to
25 knots after midnight. patchy fog after midnight. waves
building to 2 to 4 feet. 
.saturday...south winds 20 to 30 knots. waves building to 4 to
7 feet occasionally to 9 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 building to 3 to 5 feet occasionally to 7 feet. 
.sunday night...northwest winds 15 to 25 knots veering north
after midnight. waves subsiding to 1 to 3 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 1 to
3 feet. 
.wednesday...south winds 20 to 30 knots veering southwest. a
chance of showers. waves building to 3 to 5 feet occasionally to
7 feet. 

$$

fzus63 kmqt 232001
glfls 
expires:202610240800;;068326

open lake forecast for lake superior
national weather service marquette mi
400 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. 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. 




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

.late this afternoon...southeast winds 10 to 20 knots. waves 1 to
3 feet. 
.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 6 feet
occasionally to 8 feet. 
.saturday night...south winds 20 to 30 knots becoming southwest
15 to 25 knots late. a chance of showers. waves subsiding to 2 to
4 feet. 
.sunday...west winds 10 to 20 knots. a chance of showers. 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 veering east after
midnight. waves calm to 2 feet. 
.tuesday...southeast winds 10 to 20 knots. a chance of rain
showers. waves building to 1 to 3 feet. 
.wednesday...south winds 20 to 30 knots. a chance of showers.
waves building to 3 to 5 feet occasionally to 7 feet. 

$$

fzus63 kmqt 232001
glfls 
expires:202610240800;;068321

open lake forecast for lake superior
national weather service marquette mi
400 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. 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. 




lsz162-240800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 pm edt fri oct 23 2026 /300 pm cdt fri oct 23 2026/

.late this afternoon...east winds 5 to 15 knots. patchy fog.
waves calm to 2 feet. 
.tonight...east winds 5 to 15 knots becoming southeast 10 to
20 knots late. patchy fog. a slight chance of showers. waves
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. 
.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. 
.sunday night...northwest winds 10 to 20 knots veering north
after midnight. waves subsiding to 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 building to 1 to 3 feet, then
subsiding to calm to 2 feet. 
.tuesday...east winds 10 to 20 knots. a chance of rain showers.
waves building to 1 to 3 feet, then subsiding to calm to 2 feet. 
.wednesday...south winds 10 to 20 knots becoming southwest 20 to
30 knots. a chance of showers. waves building to 2 to 4 feet. 

$$

fzus63 kmqt 232001
glfls 
expires:202610240800;;068322

open lake forecast for lake superior
national weather service marquette mi
400 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. 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. 




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-
400 pm edt fri oct 23 2026

.late this afternoon...east winds 5 to 15 knots. patchy fog.
waves calm to 2 feet. 
.tonight...southeast winds 5 to 15 knots becoming south 10 to
20 knots after midnight. patchy dense fog. a slight chance of
showers after midnight. waves 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 3 to
5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. 
.sunday night...northwest winds 10 to 20 knots becoming north
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.monday...north winds 5 to 15 knots veering northeast by mid
afternoon. waves 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 3 to
5 feet occasionally to 7 feet. 

$$

fzus63 kmqt 232001
glfls 
expires:202610240800;;068323

open lake forecast for lake superior
national weather service marquette mi
400 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. 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. 




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

.late this afternoon...southeast winds 5 to 15 knots. waves calm
to 2 feet building to 1 to 3 feet. 
.tonight...southeast winds 5 to 15 knots veering south after
midnight, then increasing to 10 to 20 knots late. a slight chance
of showers after midnight. waves 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 3 to 5 feet occasionally to 7 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 3 to 5 feet
occasionally to 7 feet. 

$$

fzus63 kmqt 232001
glfls 
expires:202610240800;;068324

open lake forecast for lake superior
national weather service marquette mi
400 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. 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. 




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

.late this afternoon...south winds 10 to 20 knots. waves 1 to
3 feet. 
.tonight...south winds 10 to 20 knots increasing to 15 to
25 knots after midnight. 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 1 to 3 feet. 
.sunday...west winds 15 to 25 knots. a slight chance of showers
through early afternoon. waves building to 2 to 4 feet, then
subsiding 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 2 to 4 feet,
then subsiding to 1 to 3 feet. 

$$