fzus63 kdtx 121949
glflh 
expires:202510130400;;022783

open lake forecast for lake huron
national weather service detroit/pontiac mi
349 pm edt sun oct 12 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...a ridge of high pressure, 30.10 inches, holds over the
central great lakes through monday. a cold front pivots through
the area tuesday before broad high pressure then builds in for
midweek.


lhz361-130400-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
349 pm edt sun oct 12 2025

.tonight...southeast winds 10 to 15 knots. waves 2 to 4 feet. 
.monday...southeast winds 10 to 15 knots decreasing to 5 to
10 knots in the afternoon. waves 2 to 4 feet. 
.monday night...east winds 5 to 10 knots veering to the south in
the late evening and early morning...then veering to the
northwest after midnight. waves 1 to 3 feet. 
.tuesday...northwest winds 10 to 15 knots increasing to 15 to
20 knots with gusts to around 30 knots early in the afternoon.
waves 1 to 3 feet building to 3 to 5 feet in the late morning and
afternoon. 
.tuesday night...northwest winds 15 to 20 knots with gusts to
around 30 knots becoming northwest 15 to 20 knots after midnight.
waves 4 to 6 feet. waves occasionally around 8 feet. 
.wednesday...north winds 5 to 10 knots becoming northwest 10 to
15 knots late in the afternoon...then decreasing to 5 to 10 knots
late in the evening. waves 1 to 3 feet. 
.thursday...light and variable winds becoming southeast 5 to
10 knots in the late evening and early morning. a chance of
showers in the late evening and early morning. waves 2 feet or
less. 
.friday...south winds 5 to 10 knots increasing to 10 to 15 knots.
a chance of showers early in the morning...then showers likely.
waves 1 to 3 feet building to 3 to 5 feet. 


$$

fzus63 kdtx 121949
glflh 
expires:202510130400;;022784

open lake forecast for lake huron
national weather service detroit/pontiac mi
349 pm edt sun oct 12 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...a ridge of high pressure, 30.10 inches, holds over the
central great lakes through monday. a cold front pivots through
the area tuesday before broad high pressure then builds in for
midweek.


lhz362-363-130400-
lake huron from presque isle light to sturgeon point mi beyond
5nm off shore-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
349 pm edt sun oct 12 2025

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


$$

fzus63 kdtx 121949
glflh 
expires:202510130400;;022785

open lake forecast for lake huron
national weather service detroit/pontiac mi
349 pm edt sun oct 12 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...a ridge of high pressure, 30.10 inches, holds over the
central great lakes through monday. a cold front pivots through
the area tuesday before broad high pressure then builds in for
midweek.


lhz462>464-130400-
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-
349 pm edt sun oct 12 2025

.tonight...east winds 10 to 15 knots increasing to 15 to 20 knots
after midnight...then becoming southeast 10 to 15 knots early in
the morning. waves 1 to 3 feet building to 2 to 4 feet in the
late evening and overnight. 
.monday...southeast winds 10 to 15 knots decreasing to 5 to
10 knots early in the afternoon...then becoming light and
variable late in the afternoon. waves 2 to 4 feet subsiding to
1 to 3 feet in the late morning and afternoon. 
.monday night...light and variable winds becoming east 5 to
10 knots in the late evening and early morning...then veering to
the south after midnight. waves 2 feet or less. 
.tuesday...west winds 5 to 10 knots becoming northwest 10 to
15 knots in the late morning and early afternoon...then becoming
north 15 to 20 knots early in the afternoon. waves 1 to 3 feet
building to 3 to 5 feet in the late morning and afternoon. 
.tuesday night...north winds 15 to 20 knots. a chance of showers
after midnight. waves 6 to 9 feet. waves occasionally around
12 feet. 
.wednesday...north winds 15 to 20 knots decreasing to 10 to
15 knots late in the afternoon. waves 4 to 6 feet. waves
occasionally around 8 feet. 
.thursday...northwest winds 10 to 15 knots becoming north 5 to
10 knots until early evening...then veering to the east in the
late evening and early morning. waves 2 to 4 feet subsiding to
1 to 3 feet. 
.friday...south winds 5 to 10 knots increasing to 10 to 15 knots.
a chance of showers until early morning. waves 2 feet or less
building to 2 to 4 feet. 


$$

fzus63 kmkx 122054
glflm 
expires:202510130315;;025372

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
354 pm cdt sun oct 12 2025

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

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

.synopsis...

strong high pressure around 30.5 inches over maine will linger
tonight into monday, with low pressure around 29.3 inches moving
from southern manitoba to northwest ontario. breezy southeasterly
winds will linger over lake michigan into tonight. winds will
remain breezy and become more southerly monday morning.

winds will then ease late monday afternoon into monday evening, 
as a cold front passes, with winds becoming northerly and breezy 
behind the cold front tuesday morning into wednesday. high 
pressure around 30.3 inches then settles over the region later 
wednesday into thursday.


lmz080-669-671-673-675-777-779-870-872-874-876-878-130315-
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-
354 pm cdt sun oct 12 2025

sheboygan wi to pentwater mi south...

.tonight...southeast winds 10 to 20 kt becoming south 15 to
25 kt. waves 2 to 4 ft. 
.monday...south winds 10 to 20 kt diminishing to 10 to 15 kt.
slight chance of showers. waves 2 to 4 ft subsiding to 1 to 3 ft.
.monday night...northwest winds 5 to 10 kt becoming north late in
the evening, then increasing to 10 to 15 kt after midnight
increasing to 10 to 20 kt late. waves 1 to 3 ft building to 2 to
4 ft. 
.tuesday...north winds 10 to 20 kt. waves 4 to 7 ft occasionally
to 9 ft. 
.tuesday night...north winds 15 to 25 kt becoming northeast 10 to
20 kt. chance of showers. waves 4 to 7 ft occasionally to 9 ft. 
.wednesday...northeast winds 10 to 20 kt becoming north 10 to
15 kt. waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to
4 ft. 
.wednesday night...northeast winds 10 to 15 kt becoming east.
waves 1 to 3 ft. 
.thursday...southeast winds 10 to 15 kt increasing to 10 to
20 kt. waves 2 to 4 ft. 
.friday...south winds to 30 kt. waves 8 to 11 ft occasionally to
14 ft.  

$$

fzus63 kmkx 122054
glflm 
expires:202510130315;;025371

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
354 pm cdt sun oct 12 2025

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

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

.synopsis...

strong high pressure around 30.5 inches over maine will linger
tonight into monday, with low pressure around 29.3 inches moving
from southern manitoba to northwest ontario. breezy southeasterly
winds will linger over lake michigan into tonight. winds will
remain breezy and become more southerly monday morning.

winds will then ease late monday afternoon into monday evening, 
as a cold front passes, with winds becoming northerly and breezy 
behind the cold front tuesday morning into wednesday. high 
pressure around 30.3 inches then settles over the region later 
wednesday into thursday.


lmz261-362-364-366-563-565-567-868-130315-
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-
354 pm cdt sun oct 12 2025

sheboygan wi to pentwater mi north...

.tonight...southeast winds 10 to 20 kt becoming south to 30 kt,
then diminishing to 15 to 25 kt late. waves 3 to 5 ft. 
.monday...south winds 15 to 25 kt becoming southwest 10 to 20 kt.
slight chance of showers. waves 3 to 5 ft. 
.monday night...west winds 5 to 10 kt becoming northwest 10 to
15 kt late in the evening, then becoming north 10 to 20 kt
overnight. waves 2 to 4 ft. 
.tuesday...north winds 10 to 20 kt. waves 3 to 5 ft. 
.tuesday night...north winds 10 to 20 kt. waves 2 to 4 ft. 
.wednesday...north winds 10 to 15 kt increasing to 10 to 20 kt.
waves 2 to 4 ft subsiding to 1 to 3 ft. 
.wednesday night...north winds 10 to 15 kt becoming northeast.
waves 1 to 2 ft. 
.thursday...southeast winds 10 to 15 kt becoming south 10 to
20 kt. waves 1 to 2 ft building to 1 to 3 ft. 
.friday...south winds to 30 kt. chance of showers. waves 8 to
11 ft occasionally to 14 ft.  

$$

fzus63 kmqt 122007 cca
glfls 
expires:202510130800;;023660

open lake forecast for lake superior...corrected
national weather service marquette mi
407 pm edt sun oct 12 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...

weak 29.9 inch ridging extends over eastern lake superior off a 30.4 
inch high over the gulf of st. lawrence. a 29.2 inch low over 
southwest manitoba lifts northeast to hudson bay tonight through 
monday, extending a 29.8 inch trough over western lake superior. a 
30.5 inch high builds in over the canadian prairies monday night 
into tuesday, shifting east to the great lakes and northern ontario 
by wednesday at 30.3 inches. ridging weakens to 30.0 inches over 
lake superior through thursday as troughing develops over the plains 
and the parent high shifts northeast. thursday night through friday, 
a 29.4 inch low develops over the northern plains, lifting to 
northwestern ontario.



lsz264-130800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
407 pm edt sun oct 12 2025

...gale warning in effect through monday morning...

.late this afternoon...southeast winds 20 to 30 knots. a slight
chance of showers. waves 5 to 8 feet occasionally to 10 feet. 
.tonight...southeast gales to 35 knots veering south after
midnight, then diminishing to 20 to 30 knots late. a slight
chance of showers through midnight, then showers after midnight.
waves building to 7 to 10 feet occasionally to 13 feet, then
subsiding to 5 to 8 feet occasionally to 10 feet. 
.monday...southwest winds 20 to 30 knots veering west in the
afternoon. a chance of showers through early afternoon. waves
subsiding to 3 to 6 feet occasionally to 8 feet, then building to
4 to 7 feet occasionally to 9 feet. 
.monday night...west winds 15 to 25 knots veering northwest after
midnight. waves subsiding to 3 to 6 feet occasionally to 8 feet. 
.tuesday...northwest winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. waves subsiding to 1 to 3 feet. 
.tuesday night...northwest winds 5 to 15 knots veering north
after midnight. waves subsiding to calm to 2 feet. 
.wednesday...northwest winds 5 to 15 knots backing west by mid
afternoon. waves calm to 2 feet. 
.wednesday night...west winds 5 to 15 knots backing south after
midnight. waves calm to 2 feet. 
.thursday...south winds 10 to 20 knots increasing to 20 to
30 knots. a chance of showers, then showers likely. waves
building to 3 to 6 feet occasionally to 8 feet. 
.friday...south winds 20 to 30 knots becoming southwest 15 to
25 knots. showers likely, then a chance of showers. waves
subsiding to 2 to 4 feet, then building to 3 to 5 feet
occasionally to 7 feet. 

$$

fzus63 kmqt 122007 cca
glfls 
expires:202510130800;;023661

open lake forecast for lake superior...corrected
national weather service marquette mi
407 pm edt sun oct 12 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...

weak 29.9 inch ridging extends over eastern lake superior off a 30.4 
inch high over the gulf of st. lawrence. a 29.2 inch low over 
southwest manitoba lifts northeast to hudson bay tonight through 
monday, extending a 29.8 inch trough over western lake superior. a 
30.5 inch high builds in over the canadian prairies monday night 
into tuesday, shifting east to the great lakes and northern ontario 
by wednesday at 30.3 inches. ridging weakens to 30.0 inches over 
lake superior through thursday as troughing develops over the plains 
and the parent high shifts northeast. thursday night through friday, 
a 29.4 inch low develops over the northern plains, lifting to 
northwestern ontario.



lsz265-130800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
407 pm edt sun oct 12 2025

...gale warning in effect through monday morning...

.late this afternoon...southeast gales to 35 knots. waves 3 to
6 feet occasionally to 8 feet. 
.tonight...south gales to 35 knots. 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. 
.monday...south winds 15 to 25 knots veering west in the
afternoon. a chance of showers through early afternoon. waves
subsiding to 1 to 3 feet, then building to 2 to 4 feet. 
.monday night...west winds 15 to 25 knots becoming northwest
20 to 30 knots after midnight. waves subsiding to 1 to 3 feet,
then building to 2 to 4 feet. 
.tuesday...northwest winds 20 to 30 knots diminishing to 15 to
25 knots by mid afternoon. waves subsiding to 1 to 3 feet. 
.tuesday night...northwest winds 10 to 20 knots veering north
after midnight. waves subsiding to calm to 2 feet. 
.wednesday...northwest winds 5 to 15 knots. waves calm to 2 feet.
.wednesday night...west winds 5 to 15 knots backing southwest
after midnight. waves calm to 2 feet. 
.thursday...south winds 10 to 20 knots increasing to 20 to
30 knots. a chance of showers, then showers likely. waves
building to 1 to 3 feet. 
.friday...south winds 20 to 30 knots diminishing to 15 to
25 knots. showers likely. waves subsiding to calm to 2 feet. 

$$

fzus63 kmqt 122007 cca
glfls 
expires:202510130800;;023662

open lake forecast for lake superior...corrected
national weather service marquette mi
407 pm edt sun oct 12 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...

weak 29.9 inch ridging extends over eastern lake superior off a 30.4 
inch high over the gulf of st. lawrence. a 29.2 inch low over 
southwest manitoba lifts northeast to hudson bay tonight through 
monday, extending a 29.8 inch trough over western lake superior. a 
30.5 inch high builds in over the canadian prairies monday night 
into tuesday, shifting east to the great lakes and northern ontario 
by wednesday at 30.3 inches. ridging weakens to 30.0 inches over 
lake superior through thursday as troughing develops over the plains 
and the parent high shifts northeast. thursday night through friday, 
a 29.4 inch low develops over the northern plains, lifting to 
northwestern ontario.



lsz266-130800-
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-
407 pm edt sun oct 12 2025

...gale warning in effect through monday morning...

.late this afternoon...southeast winds 20 to 30 knots. waves 4 to
8 feet occasionally to 10 feet. 
.tonight...south gales to 35 knots. a chance of showers after
midnight. waves building to 5 to 9 feet occasionally to 11 feet. 
.monday...south winds 20 to 30 knots becoming southwest 15 to
25 knots in the afternoon, then veering west late. a chance of
showers. waves subsiding to 3 to 6 feet occasionally to 8 feet,
then building to 4 to 7 feet occasionally to 9 feet. 
.monday night...west winds 15 to 25 knots veering northwest after
midnight. waves 4 to 7 feet occasionally to 9 feet. 
.tuesday...northwest winds 20 to 30 knots diminishing to 15 to
25 knots by mid afternoon. waves subsiding to 3 to 6 feet
occasionally to 8 feet. 
.tuesday night...north winds 10 to 20 knots. waves subsiding to
1 to 3 feet. 
.wednesday...northwest winds 5 to 15 knots. waves subsiding to
calm to 2 feet. 
.wednesday night...northwest winds 5 to 15 knots backing south
after midnight. waves calm to 2 feet. 
.thursday...south winds 10 to 20 knots increasing to 20 to
30 knots. a chance of showers, then showers likely. waves
building to 4 to 7 feet occasionally to 9 feet. 
.friday...south winds 20 to 30 knots. showers likely. waves
subsiding to 3 to 5 feet occasionally to 7 feet. 

$$

fzus63 kmqt 122007 cca
glfls 
expires:202510130800;;023663

open lake forecast for lake superior...corrected
national weather service marquette mi
407 pm edt sun oct 12 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...

weak 29.9 inch ridging extends over eastern lake superior off a 30.4 
inch high over the gulf of st. lawrence. a 29.2 inch low over 
southwest manitoba lifts northeast to hudson bay tonight through 
monday, extending a 29.8 inch trough over western lake superior. a 
30.5 inch high builds in over the canadian prairies monday night 
into tuesday, shifting east to the great lakes and northern ontario 
by wednesday at 30.3 inches. ridging weakens to 30.0 inches over 
lake superior through thursday as troughing develops over the plains 
and the parent high shifts northeast. thursday night through friday, 
a 29.4 inch low develops over the northern plains, lifting to 
northwestern ontario.



lsz267-130800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
407 pm edt sun oct 12 2025

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

$$

fzus63 kmqt 122007 cca
glfls 
expires:202510130800;;023658

open lake forecast for lake superior...corrected
national weather service marquette mi
407 pm edt sun oct 12 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...

weak 29.9 inch ridging extends over eastern lake superior off a 30.4 
inch high over the gulf of st. lawrence. a 29.2 inch low over 
southwest manitoba lifts northeast to hudson bay tonight through 
monday, extending a 29.8 inch trough over western lake superior. a 
30.5 inch high builds in over the canadian prairies monday night 
into tuesday, shifting east to the great lakes and northern ontario 
by wednesday at 30.3 inches. ridging weakens to 30.0 inches over 
lake superior through thursday as troughing develops over the plains 
and the parent high shifts northeast. thursday night through friday, 
a 29.4 inch low develops over the northern plains, lifting to 
northwestern ontario.



lsz162-130800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
407 pm edt sun oct 12 2025 /307 pm cdt sun oct 12 2025/

.late this afternoon...southeast winds 20 to 30 knots. a slight
chance of showers. waves 2 to 4 feet. 
.tonight...southeast winds 20 to 30 knots veering southwest late.
showers. waves building to 3 to 5 feet occasionally to 7 feet. 
.monday...west winds 20 to 30 knots diminishing to 15 to 25 knots
late. waves subsiding to 2 to 4 feet. 
.monday night...northwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. waves subsiding to calm to 2 feet.
.tuesday...northwest winds 5 to 15 knots backing west by mid
afternoon. waves calm to 2 feet. 
.tuesday night...north winds 5 to 15 knots. waves calm to 2 feet.
.wednesday...east winds 5 to 15 knots veering southwest by mid
afternoon. waves calm to 2 feet. 
.wednesday night...east winds 5 to 15 knots veering southeast
after midnight. waves calm to 2 feet. 
.thursday...southeast winds 10 to 20 knots becoming south 15 to
25 knots. showers likely. waves building to 2 to 4 feet. 
.friday...southwest winds 15 to 25 knots. a chance of showers.
waves subsiding to 1 to 3 feet. 

$$

fzus63 kmqt 122007 cca
glfls 
expires:202510130800;;023659

open lake forecast for lake superior...corrected
national weather service marquette mi
407 pm edt sun oct 12 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...

weak 29.9 inch ridging extends over eastern lake superior off a 30.4 
inch high over the gulf of st. lawrence. a 29.2 inch low over 
southwest manitoba lifts northeast to hudson bay tonight through 
monday, extending a 29.8 inch trough over western lake superior. a 
30.5 inch high builds in over the canadian prairies monday night 
into tuesday, shifting east to the great lakes and northern ontario 
by wednesday at 30.3 inches. ridging weakens to 30.0 inches over 
lake superior through thursday as troughing develops over the plains 
and the parent high shifts northeast. thursday night through friday, 
a 29.4 inch low develops over the northern plains, lifting to 
northwestern ontario.



lsz263-130800-
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-
407 pm edt sun oct 12 2025

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

$$