fzus61 kbuf 240202
glflo 
expires:202609240900;;953722

open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt wed sep 23 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 over 
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 29.3 
inches as it moves to just off the southern new england coast 
saturday night. this low will gradually fill to 29.6 inches by 
monday as it meanders near the new england coastline.


loz062-240900-
lake ontario open waters from the niagara river to hamlin beach-
1002 pm edt wed sep 23 2026

.overnight...east winds 15 to 20 knots becoming southeast
10 to 15 knots. waves 3 to 5 feet subsiding to 2 to 3 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 10 knots or less becoming north. waves
2 feet or less. 
.friday night...north winds 10 knots or less increasing to 10 to
15 knots. waves 2 feet or less. 
.saturday...north winds 5 to 15 knots. waves 1 to 3 feet. 
.sunday...north winds 5 to 15 knots becoming northeast. waves
1 to 3 feet subsiding to 1 foot or less. 
.monday...northeast winds 10 knots or less becoming west. waves
1 foot or less. 

$$

fzus61 kbuf 240202
glflo 
expires:202609240900;;953723

open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt wed sep 23 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 over 
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 29.3 
inches as it moves to just off the southern new england coast 
saturday night. this low will gradually fill to 29.6 inches by 
monday as it meanders near the new england coastline.


loz063>065-240900-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 pm edt wed sep 23 2026

.overnight...east winds 15 to 20 knots becoming southeast
5 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 10 to 15 knots. waves 1 to
3 feet. 
.friday...northeast winds 10 to 15 knots becoming north. waves
1 to 3 feet. 
.friday night...north winds 10 to 15 knots increasing to 15 to
20 knots. waves 1 to 3 feet. 
.saturday...north winds 15 to 20 knots. waves 2 to 4 feet. 
.sunday...north winds 15 to 20 knots becoming northeast 10 to
15 knots. waves 3 to 5 feet subsiding to 1 to 3 feet. 
.monday...north winds 10 knots or less becoming southwest. waves
2 feet or less. 

$$

fzus61 kcle 240156
glfle 
expires:202609240815;;953458

open lake forecast for lake erie
national weather service cleveland oh
956 pm edt wed sep 23 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 30.20 inches over the ohio valley will shift
south tonight into thursday. high pressure of 30.40 inches will 
build south across the great lakes thursday and friday and 
influence the great lakes through early next week.


lez162-163-240815-
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-
956 pm edt wed sep 23 2026

.overnight...east winds 15 to 20 knots. waves 3 to 6 feet. 
.thursday...east winds 15 to 20 knots. waves 2 to 4 feet. 
.thursday night...east winds 15 to 20 knots becoming northeast
10 to 15 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.friday...northeast winds 5 to 10 knots. waves 1 to 3 feet. 
.friday night...northeast winds 10 to 15 knots. waves 1 to
2 feet. 
.saturday...northeast winds 5 to 10 knots becoming north. waves
2 feet or less. 
.sunday...north winds 10 knots or less. waves 1 foot or less. 
.monday...north winds 10 knots or less becoming south. waves
1 foot or less. 

$$

fzus61 kcle 240156
glfle 
expires:202609240815;;953459

open lake forecast for lake erie
national weather service cleveland oh
956 pm edt wed sep 23 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 30.20 inches over the ohio valley will shift
south tonight into thursday. high pressure of 30.40 inches will 
build south across the great lakes thursday and friday and 
influence the great lakes through early next week.


lez164>168-240815-
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-
956 pm edt wed sep 23 2026

.overnight...east winds 15 to 25 knots becoming southeast.
waves 4 to 7 feet subsiding to 3 to 6 feet. waves occasionally
around 9 feet. 
.thursday...east winds 15 to 20 knots becoming northeast. waves
2 to 4 feet. 
.thursday night...northeast winds 15 to 20 knots becoming east
10 to 15 knots. waves 3 to 5 feet subsiding to 2 to 4 feet. 
.friday...east winds 5 to 15 knots becoming northeast. waves 1 to
3 feet. 
.friday night...northeast winds 10 to 15 knots. 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. 
.monday...north winds 10 knots or less becoming south. waves
1 foot or less. 

$$

fzus61 kcle 240156
glfle 
expires:202609240815;;953460

open lake forecast for lake erie
national weather service cleveland oh
956 pm edt wed sep 23 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 30.20 inches over the ohio valley will shift
south tonight into thursday. high pressure of 30.40 inches will 
build south across the great lakes thursday and friday and 
influence the great lakes through early next week.


lez061-169-240815-
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-
956 pm edt wed sep 23 2026

.overnight...east winds 15 to 20 knots becoming southeast
10 to 15 knots. waves 3 to 5 feet subsiding to 1 to 3 feet. 
.thursday...southeast winds 10 to 15 knots becoming northeast.
waves 1 to 3 feet. 
.thursday night...northeast winds 15 to 20 knots becoming east
5 to 15 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.friday...northeast winds 5 to 15 knots. waves 2 feet or less. 
.friday night...northeast winds 5 to 15 knots. waves 2 feet or
less. 
.saturday...northeast winds 5 to 10 knots becoming north. waves
2 feet or less. 
.sunday...north winds 10 knots or less becoming northeast. waves
2 feet or less. 
.monday...north winds 10 knots or less becoming southwest. waves
1 foot or less. 

$$

fzus63 kdtx 240152
glfsc 
expires:202609241000;;953426

lake st clair forecast
national weather service detroit/pontiac mi
952 pm edt wed sep 23 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...a strong high pressure system, 30.60 inches will
travel from quebec and will center over the northern great lakes
by friday afternoon. while this continues to bring brisk east to
northeast flow today, the approaching high pressure system will
relax wind speeds through tomorrow leading to lighter winds into
the weekend.


lcz460-241000-
lake st clair-
952 pm edt wed sep 23 2026

...small craft advisory in effect until 10 pm edt this evening...

.rest of tonight...east winds 20 to 25 knots diminishing to 15 to 20
knots early in the morning. mostly clear. waves 2 to 4 feet
subsiding to 1 to 3 feet early in the morning.
.thursday...east winds 10 to 15 knots. sunny. waves 2 feet or less.
.thursday night...east winds 10 to 15 knots. clear. waves 2 feet or
less.
.friday...northeast winds 5 to 10 knots. mostly sunny. waves 2 feet
or less.
.friday night...north winds 10 to 15 knots diminishing to 5 to 10
knots after midnight. mostly clear. waves 2 feet or less.
.saturday...north 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.
.monday...southeast winds 5 to 10 knots. mostly clear. waves 2 feet
or less.

$$

fzus63 kdtx 240151
glflh 
expires:202609241000;;953416

open lake forecast for lake huron
national weather service detroit/pontiac mi
951 pm edt wed sep 23 2026

for waters beyond five nautical miles off shore on lake huron

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...a strong high pressure system, 30.60 inches will
travel from quebec and will center over the northern great lakes
by friday afternoon. while this continues to bring brisk east to
northeast flow today, the approaching high pressure system will
relax wind speeds through tomorrow leading to lighter winds into
the weekend.


lhz462>464-241000-
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-
951 pm edt wed sep 23 2026

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


$$

fzus63 kdtx 240151
glflh 
expires:202609241000;;953415

open lake forecast for lake huron
national weather service detroit/pontiac mi
951 pm edt wed sep 23 2026

for waters beyond five nautical miles off shore on lake huron

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...a strong high pressure system, 30.60 inches will
travel from quebec and will center over the northern great lakes
by friday afternoon. while this continues to bring brisk east to
northeast flow today, the approaching high pressure system will
relax wind speeds through tomorrow leading to lighter winds into
the weekend.


lhz362-363-241000-
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-
951 pm edt wed sep 23 2026

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


$$

fzus63 kdtx 240151
glflh 
expires:202609241000;;953414

open lake forecast for lake huron
national weather service detroit/pontiac mi
951 pm edt wed sep 23 2026

for waters beyond five nautical miles off shore on lake huron

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...a strong high pressure system, 30.60 inches will
travel from quebec and will center over the northern great lakes
by friday afternoon. while this continues to bring brisk east to
northeast flow today, the approaching high pressure system will
relax wind speeds through tomorrow leading to lighter winds into
the weekend.


lhz361-241000-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
951 pm edt wed sep 23 2026

.rest of tonight...east winds 5 to 10 knots. waves 1 to 3 feet. 
.thursday...southeast winds 5 to 10 knots becoming east 10 to
15 knots in the afternoon. waves 1 to 3 feet. 
.thursday night...southeast winds 5 to 10 knots  becoming light
and variable. waves 2 feet or less. 
.friday...light and variable winds. waves 2 feet or less. 
.friday night...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. 
.monday...light and variable winds. waves nearly calm. 


$$

fzus63 kmkx 240153
glflm 
expires:202609240915;;953429

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
853 pm cdt wed sep 23 2026

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

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

.synopsis...

strong high pressure around 30.6 inches will linger over
southern ontario and quebec canada through the overnight hours,
weakening to 30.4 inches through thursday. modest easterly 
winds continue through thursday morning, weakening into the
afternoon. light east to southeast winds then prevail for the
rest of the week and into the weekend as the high reorients 
from the northern great lakes to james bay.


lmz261-362-364-366-563-565-567-868-240915-
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-
853 pm cdt wed sep 23 2026

sheboygan wi to pentwater mi north...

.rest of tonight...east winds 10 to 20 kt becoming southeast.
waves 2 to 4 ft. 
.thursday...southeast winds 10 to 20 kt becoming northeast. waves
2 to 4 ft. 
.thursday night...northeast winds 10 to 20 kt veering to south
10 to 15 kt. waves 1 to 3 ft. 
.friday...south winds 10 to 15 kt diminishing to 5 to 10 kt.
waves 1 to 3 ft. 
.friday night...northeast winds 5 to 10 kt becoming east. waves
1 to 2 ft. 
.saturday...southeast winds 10 to 15 kt. waves 1 to 2 ft. 
.saturday night...east winds 5 to 10 kt becoming southeast. waves
1 to 2 ft. 
.sunday...south winds 5 to 10 kt becoming southwest. waves 1 ft
or less. 
.monday...southwest winds 5 to 10 kt. waves nearly calm.  

$$

fzus63 kmkx 240153
glflm 
expires:202609240915;;953430

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
853 pm cdt wed sep 23 2026

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

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

.synopsis...

strong high pressure around 30.6 inches will linger over
southern ontario and quebec canada through the overnight hours,
weakening to 30.4 inches through thursday. modest easterly 
winds continue through thursday morning, weakening into the
afternoon. light east to southeast winds then prevail for the
rest of the week and into the weekend as the high reorients 
from the northern great lakes to james bay.


lmz080-669-671-673-675-777-779-870-872-874-876-878-240915-
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-
853 pm cdt wed sep 23 2026

sheboygan wi to pentwater mi south...

.rest of tonight...northeast winds 15 to 25 kt becoming east
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 subsiding to 2 to 4 ft. 
.thursday night...east winds 10 to 15 kt becoming southeast.
waves 2 to 4 ft. 
.friday...southeast winds 10 to 15 kt becoming east in the
afternoon. waves 2 to 4 ft. 
.friday night...northeast winds 10 to 15 kt becoming east. waves
1 to 2 ft. 
.saturday...southeast winds 10 to 15 kt. waves 1 to 3 ft. 
.saturday night...east winds 5 to 10 kt becoming southeast. waves
1 to 2 ft. 
.sunday...southeast winds 5 to 10 kt. waves 1 to 2 ft. 
.monday...southeast winds 5 to 10 kt becoming south. waves 1 ft
or less.  

$$

fzus63 kmqt 240201
glfls 
expires:202609240800;;953659

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt wed sep 23 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

a 30.6 inch high pressure centered over quebec tonight begins to 
break down thursday morning, weakening to 30.4 inches by thursday 
night. by late friday, the high weakens to 30.3 inches over the 
eastern great lakes basin as a 29.5 inch low pressure develops over 
montana. on saturday the high begins shifting northeast toward 
northern quebec while the montana low pressure deepens and moves 
north through the canadian prairies. sunday through monday, the high 
shifts east to the canadian maritimes, weakening to 30.0 inches. 
this gradually weakens high pressure ridging over lake superior from 
30.1 inches sunday morning to 29.9 inches by the end of monday as a 
29.8 inch trough approaches from the west.




lsz264-240800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
1001 pm edt wed sep 23 2026

.rest of tonight...southeast winds 5 to 15 knots veering south
after midnight. waves calm to 2 feet. 
.thursday...south winds 5 to 15 knots backing southeast late.
waves calm to 2 feet. 
.thursday night...southeast winds 5 to 15 knots veering southwest
late. waves calm to 2 feet. 
.friday...southwest winds 5 to 15 knots becoming south less than
10 knots by mid afternoon. waves calm to 2 feet. 
.friday night...southeast winds 5 to 15 knots. waves calm to
2 feet. 
.saturday...southeast winds 5 to 15 knots. waves calm to 2 feet. 
.saturday night...southeast winds 5 to 15 knots veering south
after midnight. waves calm to 2 feet. 
.sunday...south winds 5 to 15 knots becoming southwest less than
10 knots. waves calm to 2 feet. 
.monday...south winds 5 to 15 knots increasing to 10 to 20 knots.
waves calm to 2 feet. 

$$

fzus63 kmqt 240201
glfls 
expires:202609240800;;953660

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt wed sep 23 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

a 30.6 inch high pressure centered over quebec tonight begins to 
break down thursday morning, weakening to 30.4 inches by thursday 
night. by late friday, the high weakens to 30.3 inches over the 
eastern great lakes basin as a 29.5 inch low pressure develops over 
montana. on saturday the high begins shifting northeast toward 
northern quebec while the montana low pressure deepens and moves 
north through the canadian prairies. sunday through monday, the high 
shifts east to the canadian maritimes, weakening to 30.0 inches. 
this gradually weakens high pressure ridging over lake superior from 
30.1 inches sunday morning to 29.9 inches by the end of monday as a 
29.8 inch trough approaches from the west.




lsz265-240800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
1001 pm edt wed sep 23 2026

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

$$

fzus63 kmqt 240201
glfls 
expires:202609240800;;953657

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt wed sep 23 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

a 30.6 inch high pressure centered over quebec tonight begins to 
break down thursday morning, weakening to 30.4 inches by thursday 
night. by late friday, the high weakens to 30.3 inches over the 
eastern great lakes basin as a 29.5 inch low pressure develops over 
montana. on saturday the high begins shifting northeast toward 
northern quebec while the montana low pressure deepens and moves 
north through the canadian prairies. sunday through monday, the high 
shifts east to the canadian maritimes, weakening to 30.0 inches. 
this gradually weakens high pressure ridging over lake superior from 
30.1 inches sunday morning to 29.9 inches by the end of monday as a 
29.8 inch trough approaches from the west.




lsz162-240800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 pm edt wed sep 23 2026 /901 pm cdt wed sep 23 2026/

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

$$

fzus63 kmqt 240201
glfls 
expires:202609240800;;953662

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt wed sep 23 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

a 30.6 inch high pressure centered over quebec tonight begins to 
break down thursday morning, weakening to 30.4 inches by thursday 
night. by late friday, the high weakens to 30.3 inches over the 
eastern great lakes basin as a 29.5 inch low pressure develops over 
montana. on saturday the high begins shifting northeast toward 
northern quebec while the montana low pressure deepens and moves 
north through the canadian prairies. sunday through monday, the high 
shifts east to the canadian maritimes, weakening to 30.0 inches. 
this gradually weakens high pressure ridging over lake superior from 
30.1 inches sunday morning to 29.9 inches by the end of monday as a 
29.8 inch trough approaches from the west.




lsz267-240800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
1001 pm edt wed sep 23 2026

.rest of tonight...southeast winds 10 to 20 knots. waves calm to
2 feet. 
.thursday...southeast winds 10 to 20 knots backing east late.
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...east winds 5 to 15 knots veering southeast after
midnight. waves calm to 2 feet. 
.saturday...southeast winds 5 to 15 knots backing east by mid
afternoon. waves calm to 2 feet. 
.saturday night...southeast winds 5 to 15 knots veering south
after midnight. waves calm to 2 feet. 
.sunday...south winds 5 to 15 knots. waves calm to 2 feet. 
.monday...south winds 5 to 15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 240201
glfls 
expires:202609240800;;953661

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt wed sep 23 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

a 30.6 inch high pressure centered over quebec tonight begins to 
break down thursday morning, weakening to 30.4 inches by thursday 
night. by late friday, the high weakens to 30.3 inches over the 
eastern great lakes basin as a 29.5 inch low pressure develops over 
montana. on saturday the high begins shifting northeast toward 
northern quebec while the montana low pressure deepens and moves 
north through the canadian prairies. sunday through monday, the high 
shifts east to the canadian maritimes, weakening to 30.0 inches. 
this gradually weakens high pressure ridging over lake superior from 
30.1 inches sunday morning to 29.9 inches by the end of monday as a 
29.8 inch trough approaches from the west.




lsz266-240800-
lake superior east of a line from manitou island to marquette mi
and west of a line from grand marais mi to the us/canadian border
beyond 5nm from shore-
1001 pm edt wed sep 23 2026

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

$$

fzus63 kmqt 240201
glfls 
expires:202609240800;;953658

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt wed sep 23 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

a 30.6 inch high pressure centered over quebec tonight begins to 
break down thursday morning, weakening to 30.4 inches by thursday 
night. by late friday, the high weakens to 30.3 inches over the 
eastern great lakes basin as a 29.5 inch low pressure develops over 
montana. on saturday the high begins shifting northeast toward 
northern quebec while the montana low pressure deepens and moves 
north through the canadian prairies. sunday through monday, the high 
shifts east to the canadian maritimes, weakening to 30.0 inches. 
this gradually weakens high pressure ridging over lake superior from 
30.1 inches sunday morning to 29.9 inches by the end of monday as a 
29.8 inch trough approaches from the west.




lsz263-240800-
lake superior from saxon harbor wi to upper entrance to portage
canal mi 5nm off shore to the us/canadian border including isle
royale national park-
1001 pm edt wed sep 23 2026

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

$$