fzus61 kbuf 130202
glflo 
expires:202510130900;;037447

open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt sun oct 12 2025

for waters beyond five nautical miles of shore on lake ontario

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 29.6 inch low just offshore of the carolinas will move 
north to just offshore of the delmarva by monday. meanwhile, a 30.5 
inch high will remain in place over the canadian maritimes through 
monday. the east coast low will move east into the atlantic tuesday, 
while a ridge of high pressure averaging 30.2 inches building into 
the lower great lakes. a cold front will move south across the lake 
tuesday night. an expansive 30.3 inch high will then build from the 
upper great lakes wednesday to quebec and the lower great lakes by 
thursday.


loz062-130900-
lake ontario open waters from the niagara river to hamlin beach-
1002 pm edt sun oct 12 2025

.overnight...southeast winds 15 to 20 knots becoming east.
waves 2 to 4 feet building to 3 to 5 feet. 
.monday...east winds 15 to 20 knots diminishing to 10 to
15 knots. waves 2 to 4 feet. 
.monday night...east winds 5 to 15 knots becoming northeast.
waves 1 to 3 feet. 
.tuesday...north winds 5 to 10 knots becoming west. waves 2 feet
or less. 
.tuesday night...northwest winds 10 to 15 knots becoming north
15 to 20 knots. waves 1 to 3 feet building to 2 to 4 feet. 
.wednesday...north winds 15 to 20 knots. waves 2 to 4 feet. 
.thursday...north winds 5 to 15 knots. waves 1 to 3 feet. 
.friday...northeast winds 10 knots or less becoming south. a
chance of showers friday night. waves 1 foot or less. 

$$

fzus61 kbuf 130202
glflo 
expires:202510130900;;037448

open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt sun oct 12 2025

for waters beyond five nautical miles of shore on lake ontario

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 29.6 inch low just offshore of the carolinas will move 
north to just offshore of the delmarva by monday. meanwhile, a 30.5 
inch high will remain in place over the canadian maritimes through 
monday. the east coast low will move east into the atlantic tuesday, 
while a ridge of high pressure averaging 30.2 inches building into 
the lower great lakes. a cold front will move south across the lake 
tuesday night. an expansive 30.3 inch high will then build from the 
upper great lakes wednesday to quebec and the lower great lakes by 
thursday.


loz063>065-130900-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 pm edt sun oct 12 2025

.overnight...east winds 15 to 20 knots. a chance of showers
after midnight. showers likely late. waves 2 to 4 feet. 
.monday...east winds 10 to 15 knots. a chance of showers. waves
2 to 4 feet subsiding to 1 to 3 feet. 
.monday night...east winds 5 to 15 knots becoming northeast. a
chance of showers. waves 1 to 3 feet. 
.tuesday...northeast winds 5 to 10 knots becoming west. waves
2 feet or less. 
.tuesday night...west winds 10 to 15 knots becoming north 15 to
20 knots. waves 1 to 2 feet building to 3 to 6 feet. 
.wednesday...north winds 15 to 25 knots. waves 3 to 6 feet
subsiding to 3 to 5 feet. 
.thursday...north winds 15 to 20 knots diminishing to 10 to
15 knots. waves 3 to 5 feet subsiding to 1 to 3 feet. 
.friday...north winds 5 to 10 knots becoming south. a chance of
showers friday night. waves 2 feet or less. 

$$

fzus61 kcle 130210
glfle 
expires:202510130815;;038149

open lake forecast for lake erie
national weather service cleveland oh
1010 pm edt sun oct 12 2025

for waters beyond five nautical miles of shore on lake erie

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 averaging 30.10 inches persists across lake erie through
monday before a cold front moves east across the lake on tuesday.
high pressure 30.10 inches builds across the great lakes region
behind the cold front wednesday through friday. a warm front will
lift north across lake erie thursday night into friday. 


lez164>167-130815-
the islands to vermilion oh beyond 5 nm off shoreline to us-
canadian border-
vermilion to avon point oh beyond 5 nm off shoreline to us-
canadian border-
avon point to willowick oh beyond 5 nm off shoreline to us-
canadian border-willowick to geneva-on-the-
lake oh beyond 5nm off shoreline to us-canadian border-
1010 pm edt sun oct 12 2025

.overnight...east winds 15 to 20 knots diminishing to 10 to
15 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.monday...east winds 5 to 15 knots becoming northeast 15 to
20 knots. waves 1 to 3 feet. 
.monday night...northeast winds 15 to 20 knots diminishing to
10 to 15 knots. waves 1 to 3 feet. 
.tuesday...northeast winds 5 to 10 knots becoming northwest.
waves 2 feet or less. 
.tuesday night...northwest winds 15 to 20 knots becoming north.
waves 1 to 2 feet building to 2 to 4 feet. 
.wednesday...north winds 15 to 20 knots. waves 2 to 4 feet. 
.thursday...north winds 5 to 15 knots becoming southeast. waves
1 to 3 feet subsiding to 1 foot or less. 
.friday...south winds 5 to 15 knots. a chance of showers friday
night. waves 1 to 3 feet. 

$$

fzus61 kcle 130210
glfle 
expires:202510130815;;038150

open lake forecast for lake erie
national weather service cleveland oh
1010 pm edt sun oct 12 2025

for waters beyond five nautical miles of shore on lake erie

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 averaging 30.10 inches persists across lake erie through
monday before a cold front moves east across the lake on tuesday.
high pressure 30.10 inches builds across the great lakes region
behind the cold front wednesday through friday. a warm front will
lift north across lake erie thursday night into friday. 


lez061-168-169-130815-
ripley to buffalo ny extending from 5nm off shoreline to us-
canadian border-geneva-on-the-
lake to conneaut oh beyond 5 nm off shoreline to us-
canadian border-
conneaut oh to ripley ny beyond 5 nm off shoreline to us-
canadian border-
1010 pm edt sun oct 12 2025

.overnight...east winds 15 to 20 knots diminishing to 10 to
15 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.monday...east winds 10 to 15 knots becoming northeast 15 to
20 knots. waves 1 to 3 feet. 
.monday night...northeast winds 15 to 20 knots diminishing to
10 to 15 knots. waves 1 to 3 feet. 
.tuesday...northeast winds 10 knots or less becoming west. waves
2 feet or less. 
.tuesday night...northwest winds 15 to 20 knots becoming north
10 to 15 knots. waves 2 feet or less building to 2 to 4 feet,
then subsiding to 1 to 3 feet. 
.wednesday...north winds 10 to 15 knots. waves 1 to 3 feet
building to 2 to 4 feet. 
.thursday...north winds 5 to 10 knots becoming east. waves 2 feet
or less. 
.friday...south winds 10 knots or less increasing to 10 to
15 knots. a chance of showers friday night. waves 2 feet or less.

$$

fzus61 kcle 130210
glfle 
expires:202510130815;;038148

open lake forecast for lake erie
national weather service cleveland oh
1010 pm edt sun oct 12 2025

for waters beyond five nautical miles of shore on lake erie

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 averaging 30.10 inches persists across lake erie through
monday before a cold front moves east across the lake on tuesday.
high pressure 30.10 inches builds across the great lakes region
behind the cold front wednesday through friday. a warm front will
lift north across lake erie thursday night into friday. 


lez162-163-130815-
detroit river lt. to maumee bay oh to reno beach oh beyond 5nm
offshoreline to us-canadian border-
reno beach to the islands oh beyond 5nm off shoreline to us-
canadian border-
1010 pm edt sun oct 12 2025

.overnight...east winds 10 to 15 knots becoming southeast.
waves 2 to 4 feet subsiding to 1 to 3 feet. 
.monday...southeast winds 5 to 10 knots becoming east. waves
2 feet or less. 
.monday night...east winds 5 to 15 knots becoming northeast.
waves 2 feet or less. 
.tuesday...north winds 5 to 10 knots. waves 1 foot or less. 
.tuesday night...north winds 5 to 15 knots. waves 2 feet or less.
.wednesday...north winds 10 to 15 knots. waves 2 feet or less. 
.thursday...north winds 10 knots or less becoming south. waves
2 feet or less. 
.friday...south winds 5 to 15 knots. waves 2 feet or less. 

$$

fzus63 kdtx 130156
glfsc 
expires:202510131000;;037136

lake st clair forecast
national weather service detroit/pontiac mi
956 pm edt sun oct 12 2025

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.


lcz460-131000-
lake st clair-
956 pm edt sun oct 12 2025

.rest of tonight...east winds 5 to 10 knots. clear. waves 2 feet or
less.
.monday...east winds 5 to 10 knots in the morning becoming light and
variable. sunny. waves 2 feet or less.
.monday night...light and variable winds. clear. waves 2 feet or
less.
.tuesday...light and variable winds becoming north 10 to 15 knots.
mostly sunny. waves 2 feet or less.
.tuesday night...north winds 10 to 15 knots increasing to 15 to 20
knots after midnight. partly cloudy. waves 2 feet or less.
.wednesday...north winds 10 to 15 knots. partly sunny becoming
mostly sunny in the afternoon becoming clear. waves 2 feet or less.
.thursday...east winds 5 to 10 knots. clear. waves 2 feet or less.
.friday...south winds 10 to 15 knots. partly cloudy. waves 2 feet or
less.

$$

fzus63 kdtx 130156
glflh 
expires:202510131000;;037121

open lake forecast for lake huron
national weather service detroit/pontiac mi
956 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.


lhz361-131000-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
956 pm edt sun oct 12 2025

.rest of 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 130156
glflh 
expires:202510131000;;037122

open lake forecast for lake huron
national weather service detroit/pontiac mi
956 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.


lhz362-363-131000-
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-
956 pm edt sun oct 12 2025

.rest of 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 130156
glflh 
expires:202510131000;;037123

open lake forecast for lake huron
national weather service detroit/pontiac mi
956 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>464-131000-
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-
956 pm edt sun oct 12 2025

.rest of 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 2 to 4 feet. 
.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 130214
glflm 
expires:202510130915;;038232

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
914 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 
overnight into monday, with low pressure around 29.3 inches moving
from southern manitoba to northwest ontario. breezy southeasterly
winds will linger over lake michigan overnight. 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.


lmz080-669-671-673-675-777-779-870-872-874-876-878-130915-
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-
914 pm cdt sun oct 12 2025

sheboygan wi to pentwater mi south...

.rest of tonight...southeast winds 15 to 25 kt becoming south.
waves 2 to 4 ft. 
.monday...south winds 10 to 20 kt diminishing to 10 to 15 kt.
isolated 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 130214
glflm 
expires:202510130915;;038231

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
914 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 
overnight into monday, with low pressure around 29.3 inches moving
from southern manitoba to northwest ontario. breezy southeasterly
winds will linger over lake michigan overnight. 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.


lmz261-362-364-366-563-565-567-868-130915-
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-
914 pm cdt sun oct 12 2025

sheboygan wi to pentwater mi north...

.rest of tonight...southeast winds 15 to 25 kt becoming south.
waves 3 to 5 ft. 
.monday...south winds 15 to 25 kt becoming southwest 10 to 20 kt.
isolated showers in the morning, then scattered showers in the
afternoon. 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 130204 cca
glfls 
expires:202510130800;;037512

open lake forecast for lake superior...corrected
national weather service marquette mi
1004 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...

29.8 inch troughing remains over lake superior the rest of this 
evening into monday morning as a 29.1 inch low over southwest 
manitoba continues northeast to hudson bay tonight through monday, 
gradually weakening to 29.5 inches as it does so. 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 around 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 east. thursday night through friday, a 29.4 
inch low develops over the northern plains and lifts near to lake 
winnipeg. this low is projected to bring 29.6 inch troughing over 
lake superior friday and friday night.



lsz162-130800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1004 pm edt sun oct 12 2025 /904 pm cdt sun oct 12 2025/

.rest of tonight...southeast winds 15 to 25 knots veering
southwest late. showers likely. waves 2 to 4 feet 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 130204 cca
glfls 
expires:202510130800;;037513

open lake forecast for lake superior...corrected
national weather service marquette mi
1004 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...

29.8 inch troughing remains over lake superior the rest of this 
evening into monday morning as a 29.1 inch low over southwest 
manitoba continues northeast to hudson bay tonight through monday, 
gradually weakening to 29.5 inches as it does so. 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 around 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 east. thursday night through friday, a 29.4 
inch low develops over the northern plains and lifts near to lake 
winnipeg. this low is projected to bring 29.6 inch troughing over 
lake superior friday and friday night.



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-
1004 pm edt sun oct 12 2025

.rest of tonight...south winds 20 to 30 knots increasing to
30 knots with a few gale force gusts to 35 knots possible late. a
slight chance of showers by midnight, then showers after
midnight. waves 3 to 6 feet occasionally to 8 feet. 
.monday...west winds 20 to 30 knots. 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. 

$$

fzus63 kmqt 130204 cca
glfls 
expires:202510130800;;037514

open lake forecast for lake superior...corrected
national weather service marquette mi
1004 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...

29.8 inch troughing remains over lake superior the rest of this 
evening into monday morning as a 29.1 inch low over southwest 
manitoba continues northeast to hudson bay tonight through monday, 
gradually weakening to 29.5 inches as it does so. 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 around 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 east. thursday night through friday, a 29.4 
inch low develops over the northern plains and lifts near to lake 
winnipeg. this low is projected to bring 29.6 inch troughing over 
lake superior friday and friday night.



lsz264-130800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
1004 pm edt sun oct 12 2025

...gale warning in effect until 8 am edt monday...

.rest of tonight...southeast gales to 35 knots veering south
after midnight, then diminishing to 20 to 30 knots late. a slight
chance of showers by midnight. showers after midnight. waves 7 to
10 feet occasionally to 13 feet subsiding to 5 to 8 feet
occasionally to 10 feet. 
.monday...southwest winds 20 to 30 knots veering west in the
afternoon. a slight 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 130204 cca
glfls 
expires:202510130800;;037515

open lake forecast for lake superior...corrected
national weather service marquette mi
1004 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...

29.8 inch troughing remains over lake superior the rest of this 
evening into monday morning as a 29.1 inch low over southwest 
manitoba continues northeast to hudson bay tonight through monday, 
gradually weakening to 29.5 inches as it does so. 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 around 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 east. thursday night through friday, a 29.4 
inch low develops over the northern plains and lifts near to lake 
winnipeg. this low is projected to bring 29.6 inch troughing over 
lake superior friday and friday night.



lsz265-130800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
1004 pm edt sun oct 12 2025

...gale warning in effect until 8 am edt monday...

.rest of tonight...south winds 20 to 30 knots with a few gale force
gusts to 35 knots. showers after midnight. waves 4 to 7 feet 
occasionally to 9 feet 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 130204 cca
glfls 
expires:202510130800;;037516

open lake forecast for lake superior...corrected
national weather service marquette mi
1004 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...

29.8 inch troughing remains over lake superior the rest of this 
evening into monday morning as a 29.1 inch low over southwest 
manitoba continues northeast to hudson bay tonight through monday, 
gradually weakening to 29.5 inches as it does so. 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 around 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 east. thursday night through friday, a 29.4 
inch low develops over the northern plains and lifts near to lake 
winnipeg. this low is projected to bring 29.6 inch troughing over 
lake superior friday and friday night.



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-
1004 pm edt sun oct 12 2025

...gale warning in effect until 8 am edt monday...

.rest of tonight...south gales to 35 knots diminishing to 20 to
30 knots late. a chance of showers after midnight. waves 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. showers likely
through early afternoon. a chance of showers by mid 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 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 130204 cca
glfls 
expires:202510130800;;037517

open lake forecast for lake superior...corrected
national weather service marquette mi
1004 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...

29.8 inch troughing remains over lake superior the rest of this 
evening into monday morning as a 29.1 inch low over southwest 
manitoba continues northeast to hudson bay tonight through monday, 
gradually weakening to 29.5 inches as it does so. 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 around 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 east. thursday night through friday, a 29.4 
inch low develops over the northern plains and lifts near to lake 
winnipeg. this low is projected to bring 29.6 inch troughing over 
lake superior friday and friday night.



lsz267-130800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
1004 pm edt sun oct 12 2025

.rest of tonight...southeast winds 20 to 30 knots veering south
after midnight. waves 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 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 4 to 7 feet
occasionally to 9 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. 

$$