fzus61 kbuf 230202
glflo 
expires:202609230900;;900378

open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt tue sep 22 2026

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...an expansive 30.6 inch high will remain centered from 
eastern ontario province to southern quebec through saturday while 
gradually weakening to 30.3 inches late this week. an elongated 29.6 
inch low well offshore of the mid atlantic coast friday is forecast 
to strengthen to 29.2 inches as it moves to just off the southern 
new england coast saturday night through sunday.


loz063>065-230900-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 pm edt tue sep 22 2026

.overnight...northeast winds 15 to 20 knots becoming east.
waves 3 to 6 feet. 
.wednesday...east winds 10 to 15 knots becoming northeast 15 to
20 knots. waves 2 to 4 feet. 
.wednesday night...northeast winds 15 to 20 knots becoming
southeast 5 to 15 knots. waves 1 to 3 feet building to 2 to
4 feet, then subsiding to 1 to 3 feet. 
.thursday...east winds 5 to 15 knots becoming northeast. waves
2 feet or less. 
.thursday night...northeast winds 5 to 15 knots. waves 1 to
3 feet. 
.friday...northeast winds 10 to 15 knots becoming north. waves
1 to 3 feet. 
.saturday...north winds 15 to 20 knots. waves 2 to 4 feet. 
.sunday...north winds 15 to 20 knots diminishing to 5 to
15 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 

$$

fzus61 kbuf 230202
glflo 
expires:202609230900;;900377

open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt tue sep 22 2026

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...an expansive 30.6 inch high will remain centered from 
eastern ontario province to southern quebec through saturday while 
gradually weakening to 30.3 inches late this week. an elongated 29.6 
inch low well offshore of the mid atlantic coast friday is forecast 
to strengthen to 29.2 inches as it moves to just off the southern 
new england coast saturday night through sunday.


loz062-230900-
lake ontario open waters from the niagara river to hamlin beach-
1002 pm edt tue sep 22 2026

.overnight...northeast winds 15 to 25 knots becoming east.
waves 4 to 6 feet. 
.wednesday...east winds 15 to 25 knots. waves 3 to 6 feet. 
.wednesday night...east winds 15 to 25 knots becoming southeast
and diminishing to 10 to 15 knots. waves 3 to 6 feet subsiding to
2 to 4 feet. 
.thursday...southeast winds 5 to 15 knots becoming east. waves
1 to 3 feet. 
.thursday night...east winds 5 to 15 knots becoming northeast.
waves 1 to 2 feet. 
.friday...northeast winds 5 to 15 knots becoming north. waves
2 feet or less. 
.saturday...north winds 5 to 15 knots. waves 1 to 3 feet. 
.sunday...north winds 5 to 15 knots diminishing to less than
10 knots. waves 2 feet or less. 

$$

fzus61 kcle 230117
glfle 
expires:202609230830;;899707

open lake forecast for lake erie
national weather service cleveland oh
917 pm edt tue sep 22 2026

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 trough averaging 30.00 inches will persist across lake erie 
through wednesday. high pressure 30.20 inches will build south 
across the great lakes thursday through the weekend.


lez162-163-230830-
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-
917 pm edt tue sep 22 2026

.rest of tonight...east winds 20 to 25 knots. a slight chance of
waterspouts. a slight chance of showers. waves 5 to 8 feet. waves
occasionally around 10 feet. 
.wednesday...east winds 20 to 25 knots. a chance of showers
through early afternoon, then a slight chance of showers late.
waves 4 to 7 feet subsiding to 3 to 6 feet. waves occasionally
around 9 feet. 
.wednesday night...east winds 15 to 20 knots. waves 3 to 6 feet
subsiding to 2 to 4 feet. 
.thursday...east winds 15 to 20 knots. waves 2 to 4 feet. 
.thursday night...east winds 15 to 20 knots diminishing to 5 to
15 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.friday...northeast winds 5 to 10 knots. waves 2 feet or less. 
.saturday...northeast winds 5 to 10 knots. waves 2 feet or less. 
.sunday...north winds 10 knots or less. waves 1 foot or less. 

$$

fzus61 kcle 230117
glfle 
expires:202609230830;;899709

open lake forecast for lake erie
national weather service cleveland oh
917 pm edt tue sep 22 2026

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 trough averaging 30.00 inches will persist across lake erie 
through wednesday. high pressure 30.20 inches will build south 
across the great lakes thursday through the weekend.


lez061-169-230830-
ripley to buffalo ny extending from 5nm off shoreline to us-
canadian border-
conneaut oh to ripley ny beyond 5 nm off shoreline to us-
canadian border-
917 pm edt tue sep 22 2026

.rest of tonight...east winds 15 to 25 knots. waves 4 to 7 feet
subsiding to 3 to 6 feet. waves occasionally around 9 feet. 
.wednesday...east winds 15 to 20 knots. waves 2 to 4 feet. 
.wednesday night...east winds 15 to 20 knots diminishing to 10 to
15 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.thursday...east winds 5 to 15 knots becoming northeast. waves
2 feet or less. 
.thursday night...northeast winds 15 to 20 knots becoming east
5 to 15 knots. waves 1 to 3 feet. 
.friday...northeast winds 5 to 15 knots. waves 2 feet or less. 
.saturday...northeast winds 5 to 10 knots. waves 2 feet or less. 
.sunday...north winds 10 knots or less. waves 1 foot or less. 

$$

fzus61 kcle 230117
glfle 
expires:202609230830;;899708

open lake forecast for lake erie
national weather service cleveland oh
917 pm edt tue sep 22 2026

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 trough averaging 30.00 inches will persist across lake erie 
through wednesday. high pressure 30.20 inches will build south 
across the great lakes thursday through the weekend.


lez164>168-230830-
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-geneva-on-
the-lake to conneaut oh beyond 5 nm off shoreline to us-
canadian border-
917 pm edt tue sep 22 2026

.rest of tonight...east winds to 30 knots diminishing to 15 to
25 knots. a slight chance of waterspouts late this evening. a
slight chance of showers late this evening. a slight chance of
showers late. waves 5 to 9 feet. waves occasionally around
11 feet. 
.wednesday...east winds 15 to 25 knots. a slight chance of
showers through early afternoon. waves 4 to 7 feet. waves
occasionally around 9 feet. 
.wednesday night...east winds 15 to 25 knots. waves 4 to 7 feet
subsiding to 3 to 6 feet. waves occasionally around 9 feet. 
.thursday...east winds 15 to 20 knots. waves 2 to 4 feet. 
.thursday night...east winds 15 to 20 knots diminishing to 5 to
10 knots. waves 3 to 5 feet subsiding to 1 to 3 feet. 
.friday...east winds 5 to 15 knots becoming northeast. waves 1 to
3 feet. 
.saturday...northeast winds 5 to 15 knots. waves 1 to 3 feet. 
.sunday...north winds 5 to 10 knots. waves 2 feet or less. 

$$

fzus63 kdtx 230158
glflh 
expires:202609231000;;900139

open lake forecast for lake huron
national weather service detroit/pontiac mi
958 pm edt tue sep 22 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, builds further east into
quebec today leading to continued modest east-northeast winds
over the central great lakes. a weak low pressure system should
emerge over the northern portion of the ohio valley by wednesday
morning, and could lead to some light showers for western lake
erie.


lhz362-363-231000-
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-
958 pm edt tue sep 22 2026

.rest of tonight...east winds 15 to 20 knots. waves 3 to 5 feet. 
.wednesday...east winds 15 to 20 knots decreasing to 10 to
15 knots in the afternoon. waves 3 to 5 feet. 
.wednesday night...east winds 10 to 15 knots veering to the
southeast after midnight. waves 3 to 5 feet. 
.thursday...east winds 10 to 15 knots decreasing to 5 to 10 knots
early in the afternoon. waves 1 to 3 feet. 
.thursday night...east winds 5 to 10 knots  becoming light and
variable. waves 2 feet or less. 
.friday...light and variable winds. waves 2 feet or less. 
.saturday...north winds 5 to 10 knots early in the morning
becoming light and variable. waves 2 feet or less. 
.sunday...light and variable winds. waves 2 feet or less. 


$$

fzus63 kdtx 230158
glflh 
expires:202609231000;;900140

open lake forecast for lake huron
national weather service detroit/pontiac mi
958 pm edt tue sep 22 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, builds further east into
quebec today leading to continued modest east-northeast winds
over the central great lakes. a weak low pressure system should
emerge over the northern portion of the ohio valley by wednesday
morning, and could lead to some light showers for western lake
erie.


lhz462>464-231000-
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-
958 pm edt tue sep 22 2026

.rest of tonight...east winds 15 to 20 knots. waves 3 to 5 feet. 
.wednesday...east winds 15 to 20 knots decreasing to 10 to
15 knots in the afternoon. waves 2 to 4 feet. 
.wednesday night...east winds 15 to 20 knots. waves 3 to 5 feet. 
.thursday...east winds 10 to 15 knots decreasing to 5 to 10 knots
early in the afternoon. waves 2 to 4 feet subsiding to 1 to
3 feet in the late morning and afternoon. 
.thursday night...east winds 5 to 10 knots increasing to 10 to
15 knots by midnight...then becoming southeast 5 to 10 knots
after midnight. waves 2 feet or less. 
.friday...east winds 5 to 10 knots backing to the north late in
the afternoon. waves 2 feet or less. 
.saturday...northeast winds 5 to 10 knots. waves 2 feet or less. 
.sunday...north winds 5 to 10 knots. waves 2 feet or less. 


$$

fzus63 kdtx 230158
glfsc 
expires:202609231000;;900177

lake st clair forecast
national weather service detroit/pontiac mi
958 pm edt tue sep 22 2026

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, builds further east into
quebec today leading to continued modest east-northeast winds
over the central great lakes. a weak low pressure system should
emerge over the northern portion of the ohio valley by wednesday
morning, and could lead to some light showers for western lake
erie.


lcz460-231000-
lake st clair-
958 pm edt tue sep 22 2026

...small craft advisory in effect through wednesday evening...

.rest of tonight...northeast winds to 30 knots diminishing to 20 to
25 knots early in the morning. mostly cloudy this evening becoming
partly cloudy. waves 3 to 5 feet. waves occasionally around 7 feet.
.wednesday...east winds 20 to 25 knots diminishing to 15 to 20 knots
in the afternoon. partly sunny. waves 2 to 4 feet subsiding to 1 to
3 feet in the afternoon.
.wednesday night...east winds 20 to 25 knots diminishing to 15 to 20
knots after midnight. mostly clear. waves 2 to 4 feet subsiding to 1
to 3 feet after midnight.
.thursday...east winds 10 to 15 knots. sunny. waves 2 feet or less.
.thursday night...east winds 10 to 15 knots. mostly clear. waves 2
feet or less.
.friday...northeast winds 5 to 10 knots. mostly sunny in the morning
becoming clear. waves 2 feet or less.
.saturday...northeast winds 5 to 10 knots. clear. waves 2 feet or
less.
.sunday...northeast winds 5 to 10 knots. mostly clear. waves 2 feet
or less.

$$

fzus63 kdtx 230158
glflh 
expires:202609231000;;900138

open lake forecast for lake huron
national weather service detroit/pontiac mi
958 pm edt tue sep 22 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, builds further east into
quebec today leading to continued modest east-northeast winds
over the central great lakes. a weak low pressure system should
emerge over the northern portion of the ohio valley by wednesday
morning, and could lead to some light showers for western lake
erie.


lhz361-231000-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
958 pm edt tue sep 22 2026

.rest of tonight...east winds 10 to 15 knots increasing to 15 to
20 knots early in the morning. waves 1 to 3 feet building to 2 to
4 feet after midnight. 
.wednesday...east winds 10 to 15 knots increasing to 15 to
20 knots late in the morning...then decreasing to 10 to 15 knots
in the afternoon. waves 3 to 5 feet. 
.wednesday night...east winds 10 to 15 knots decreasing to 5 to
10 knots after midnight. waves 2 to 4 feet subsiding to 1 to
3 feet in the late evening and overnight. 
.thursday...southeast winds 5 to 10 knots becoming east 10 to
15 knots in the late morning and afternoon. waves 1 to 3 feet. 
.thursday night...southeast winds 5 to 10 knots  becoming light
and variable. waves 1 to 3 feet. 
.friday...light and variable winds. waves 2 feet or less. 
.saturday...light and variable winds. waves 2 feet or less. 
.sunday...light and variable winds. waves nearly calm. 


$$

fzus63 kmkx 230227
glflm 
expires:202609230915;;901503

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
927 pm cdt tue sep 22 2026

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

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

.synopsis...

high pressure around 30.3 inches will largely remain in place to 
the northeast of the great lakes region through thursday. gusty 
east to northeast winds are expected during this time. winds look 
to gradually diminish and turn east southeasterly toward the end 
of the week, as the high pressure system slowly retreats eastward
for a time before it returns next week as a nor'easter moves up
the eastern seaboard and nudges the high back west.


lmz080-669-671-673-675-777-779-870-872-874-876-878-230915-
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-
927 pm cdt tue sep 22 2026

sheboygan wi to pentwater mi south...

.rest of tonight...east winds 15 to 25 kt. waves 4 to 7 ft
occasionally to 9 ft. 
.wednesday...east winds 15 to 25 kt becoming northeast. waves
4 to 6 ft occasionally to 8 ft. 
.wednesday night...east winds 10 to 20 kt. waves 3 to 5 ft. 
.thursday...east winds 10 to 20 kt diminishing to 10 to 15 kt.
waves 3 to 5 ft. 
.thursday night...east winds 10 to 15 kt becoming southeast.
waves 1 to 3 ft. 
.friday...east winds 5 to 10 kt. waves 1 to 3 ft. 
.friday night...east winds 10 to 15 kt becoming southeast. waves
1 to 2 ft. 
.saturday...southeast winds 10 to 15 kt. waves 1 to 3 ft. 
.sunday...south winds 10 to 15 kt. waves 1 to 2 ft.  

$$

fzus63 kmkx 230227
glflm 
expires:202609230915;;901502

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
927 pm cdt tue sep 22 2026

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

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

.synopsis...

high pressure around 30.3 inches will largely remain in place to 
the northeast of the great lakes region through thursday. gusty 
east to northeast winds are expected during this time. winds look 
to gradually diminish and turn east southeasterly toward the end 
of the week, as the high pressure system slowly retreats eastward
for a time before it returns next week as a nor'easter moves up
the eastern seaboard and nudges the high back west.


lmz261-362-364-366-563-565-567-868-230915-
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-
927 pm cdt tue sep 22 2026

sheboygan wi to pentwater mi north...

.rest of tonight...east winds 15 to 25 kt diminishing to 10 to
20 kt. waves 4 to 6 ft occasionally to 8 ft. 
.wednesday...east winds 15 to 25 kt becoming northeast. waves
3 to 5 ft. 
.wednesday night...east winds 15 to 25 kt becoming southeast
10 to 20 kt. waves 3 to 5 ft. 
.thursday...southeast winds 10 to 15 kt becoming east 10 to
20 kt. waves 2 to 4 ft. 
.thursday night...east winds 10 to 20 kt becoming southeast 10 to
15 kt. waves 1 to 3 ft. 
.friday...southeast winds 5 to 10 kt increasing to 10 to 15 kt.
waves 1 to 3 ft. 
.friday night...east winds 10 to 15 kt becoming southeast. waves
1 to 2 ft. 
.saturday...southeast winds 10 to 15 kt becoming south. waves
1 to 2 ft. 
.sunday...south winds 10 to 15 kt becoming southwest. waves 1 to
2 ft.  

$$

fzus63 kmqt 230201
glfls 
expires:202609230800;;900333

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt tue sep 22 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 inc high pressure currently centered over the ontario/quebec 
border strengthens 30.6 inches over quebec by wednesday morning. this 
keeps a 30.5 inch ridge over lake superior while mainly easterly 
surface winds persist. the quebec high begins to break down thursday 
morning, weakening to 30.4 inches by thursday night as light winds 
veer southerly. by late friday, the high weakens to 30.2 inches over 
the eastern great lakes basin as 29.5 inch low pressure develops 
over montana. southerly flow persists through saturday as the high 
deteriorates further and the montana low pressure deepens and moves 
north toward the canadian prairies.




lsz162-230800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 pm edt tue sep 22 2026 /901 pm cdt tue sep 22 2026/

.rest of tonight...east winds 10 to 20 knots diminishing to 5 to
15 knots after midnight, then veering southeast late. waves 1 to
3 feet subsiding to calm to 2 feet. 
.wednesday...southeast winds 5 to 15 knots backing east in the
afternoon, then increasing to 10 to 20 knots late. waves building
to 1 to 3 feet. 
.wednesday night...east winds 10 to 20 knots veering south after
midnight, then diminishing to 5 to 15 knots late. waves subsiding
to calm to 2 feet, then building to 1 to 3 feet. 
.thursday...south winds 5 to 15 knots backing east by mid
afternoon. a slight chance of showers. waves calm to 2 feet. 
.thursday night...east winds 5 to 15 knots becoming south less
than 10 knots after midnight. waves calm to 2 feet. 
.friday...south winds less than 10 knots becoming east 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.friday night...east winds 5 to 15 knots. waves calm to 2 feet. 
.saturday...southeast winds 10 to 20 knots veering south. a
chance of showers. waves calm to 2 feet. 
.sunday...southwest winds 5 to 15 knots veering west. waves calm
to 2 feet. 

$$

fzus63 kmqt 230201
glfls 
expires:202609230800;;900334

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt tue sep 22 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 inc high pressure currently centered over the ontario/quebec 
border strengthens 30.6 inches over quebec by wednesday morning. this 
keeps a 30.5 inch ridge over lake superior while mainly easterly 
surface winds persist. the quebec high begins to break down thursday 
morning, weakening to 30.4 inches by thursday night as light winds 
veer southerly. by late friday, the high weakens to 30.2 inches over 
the eastern great lakes basin as 29.5 inch low pressure develops 
over montana. southerly flow persists through saturday as the high 
deteriorates further and the montana low pressure deepens and moves 
north toward the canadian prairies.




lsz263-230800-
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-
1001 pm edt tue sep 22 2026

.rest of tonight...east winds 10 to 20 knots becoming southeast
5 to 15 knots after midnight. waves 1 to 3 feet subsiding to calm
to 2 feet. 
.wednesday...southeast winds 5 to 15 knots backing east late.
waves calm to 2 feet. 
.wednesday night...southeast winds 10 to 20 knots veering south
after midnight, then diminishing to 5 to 15 knots late. waves
building to 1 to 3 feet. 
.thursday...south winds 5 to 15 knots. waves subsiding to calm to
2 feet. 
.thursday night...southeast winds 5 to 15 knots veering south
after midnight. waves calm to 2 feet. 
.friday...south winds 5 to 15 knots backing northeast by mid
afternoon. waves calm to 2 feet. 
.friday night...east winds 5 to 15 knots veering south after
midnight. waves calm to 2 feet. 
.saturday...southeast winds 5 to 15 knots becoming south 10 to
20 knots. a chance of showers. waves building to 1 to 3 feet. 
.sunday...southwest winds 10 to 20 knots becoming west 5 to
15 knots. waves subsiding to calm to 2 feet. 

$$

fzus63 kmqt 230201
glfls 
expires:202609230800;;900335

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt tue sep 22 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 inc high pressure currently centered over the ontario/quebec 
border strengthens 30.6 inches over quebec by wednesday morning. this 
keeps a 30.5 inch ridge over lake superior while mainly easterly 
surface winds persist. the quebec high begins to break down thursday 
morning, weakening to 30.4 inches by thursday night as light winds 
veer southerly. by late friday, the high weakens to 30.2 inches over 
the eastern great lakes basin as 29.5 inch low pressure develops 
over montana. southerly flow persists through saturday as the high 
deteriorates further and the montana low pressure deepens and moves 
north toward the canadian prairies.




lsz264-230800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
1001 pm edt tue sep 22 2026

.rest of tonight...east winds 5 to 15 knots veering southeast
after midnight. waves calm to 2 feet. 
.wednesday...southeast winds 5 to 15 knots. waves calm to 2 feet.
.wednesday night...southeast winds 10 to 20 knots veering south
after midnight, then diminishing to 5 to 15 knots late. waves
building to 1 to 3 feet. 
.thursday...south winds 5 to 15 knots. waves subsiding to calm to
2 feet. 
.thursday night...south winds 5 to 15 knots. waves calm to
2 feet. 
.friday...southwest winds less than 10 knots backing south by mid
afternoon. waves calm to 2 feet. 
.friday night...southeast winds 5 to 15 knots. waves calm to
2 feet. 
.saturday...southeast winds 10 to 20 knots veering south. waves
calm to 2 feet. 
.sunday...southwest winds 5 to 15 knots veering west. waves calm
to 2 feet. 

$$

fzus63 kmqt 230201
glfls 
expires:202609230800;;900336

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt tue sep 22 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 inc high pressure currently centered over the ontario/quebec 
border strengthens 30.6 inches over quebec by wednesday morning. this 
keeps a 30.5 inch ridge over lake superior while mainly easterly 
surface winds persist. the quebec high begins to break down thursday 
morning, weakening to 30.4 inches by thursday night as light winds 
veer southerly. by late friday, the high weakens to 30.2 inches over 
the eastern great lakes basin as 29.5 inch low pressure develops 
over montana. southerly flow persists through saturday as the high 
deteriorates further and the montana low pressure deepens and moves 
north toward the canadian prairies.




lsz265-230800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
1001 pm edt tue sep 22 2026

.rest of tonight...east winds 10 to 20 knots veering southeast
after midnight. waves calm to 2 feet. 
.wednesday...southeast winds 10 to 20 knots becoming east 15 to
25 knots late. waves building to 1 to 3 feet. 
.wednesday night...southeast winds 15 to 25 knots becoming south
10 to 20 knots after midnight, then diminishing to 5 to 15 knots
late. waves subsiding to calm to 2 feet. 
.thursday...south winds 10 to 20 knots backing southeast by mid
afternoon. waves calm to 2 feet. 
.thursday night...south winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. waves calm to 2 feet. 
.friday...south winds 5 to 15 knots backing east by mid
afternoon. waves calm to 2 feet. 
.friday night...southeast winds 10 to 20 knots becoming south
5 to 15 knots after midnight. waves calm to 2 feet. 
.saturday...southeast winds 15 to 25 knots becoming south 10 to
20 knots. waves building to 1 to 3 feet, then subsiding to calm
to 2 feet. 
.sunday...south winds 10 to 20 knots becoming west 5 to 15 knots.
waves calm to 2 feet. 

$$

fzus63 kmqt 230201
glfls 
expires:202609230800;;900337

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt tue sep 22 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 inc high pressure currently centered over the ontario/quebec 
border strengthens 30.6 inches over quebec by wednesday morning. this 
keeps a 30.5 inch ridge over lake superior while mainly easterly 
surface winds persist. the quebec high begins to break down thursday 
morning, weakening to 30.4 inches by thursday night as light winds 
veer southerly. by late friday, the high weakens to 30.2 inches over 
the eastern great lakes basin as 29.5 inch low pressure develops 
over montana. southerly flow persists through saturday as the high 
deteriorates further and the montana low pressure deepens and moves 
north toward the canadian prairies.




lsz266-230800-
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-
1001 pm edt tue sep 22 2026

.rest of tonight...east winds 10 to 20 knots becoming southeast
5 to 15 knots late. waves calm to 2 feet. 
.wednesday...southeast winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon, then backing east late. waves calm to
2 feet. 
.wednesday night...southeast winds 10 to 20 knots becoming south
15 to 25 knots after midnight, then diminishing to 10 to 20 knots
late. waves building to 1 to 3 feet. 
.thursday...south winds 10 to 20 knots backing southeast by mid
afternoon. waves subsiding to calm to 2 feet. 
.thursday night...south winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. waves calm to 2 feet. 
.friday...south winds 5 to 15 knots backing east by mid
afternoon. waves calm to 2 feet. 
.friday night...southeast winds 5 to 15 knots veering south after
midnight. waves calm to 2 feet. 
.saturday...southeast winds 10 to 20 knots veering south. waves
building to 1 to 3 feet, then subsiding to calm to 2 feet. 
.sunday...south winds 10 to 20 knots becoming southwest 5 to
15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 230201
glfls 
expires:202609230800;;900338

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt tue sep 22 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 inc high pressure currently centered over the ontario/quebec 
border strengthens 30.6 inches over quebec by wednesday morning. this 
keeps a 30.5 inch ridge over lake superior while mainly easterly 
surface winds persist. the quebec high begins to break down thursday 
morning, weakening to 30.4 inches by thursday night as light winds 
veer southerly. by late friday, the high weakens to 30.2 inches over 
the eastern great lakes basin as 29.5 inch low pressure develops 
over montana. southerly flow persists through saturday as the high 
deteriorates further and the montana low pressure deepens and moves 
north toward the canadian prairies.




lsz267-230800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
1001 pm edt tue sep 22 2026

.rest of tonight...east winds 10 to 20 knots veering southeast
after midnight. waves calm to 2 feet. 
.wednesday...southeast winds 10 to 20 knots backing east in the
afternoon, then diminishing to 5 to 15 knots late. waves calm to
2 feet. 
.wednesday night...southeast winds 10 to 20 knots veering south
late. waves calm to 2 feet. 
.thursday...south winds 10 to 20 knots backing southeast by mid
afternoon. waves calm to 2 feet. 
.thursday night...southeast winds 10 to 20 knots veering south
after midnight. waves calm to 2 feet. 
.friday...south winds 5 to 15 knots backing east by mid
afternoon. waves calm to 2 feet. 
.friday night...southeast winds 5 to 15 knots veering south after
midnight. waves calm to 2 feet. 
.saturday...southeast winds 5 to 15 knots becoming south 10 to
20 knots. waves calm to 2 feet. 
.sunday...south winds 5 to 15 knots veering southwest. waves calm
to 2 feet. 

$$