fzus63 kdtx 130141
glflh 
expires:202609130945;;355455

open lake forecast for lake huron
national weather service detroit/pontiac mi
941 pm edt sat sep 12 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...low pressure, 29.30 inches, will continue to push
eastward over northern ontario as it drags a cold front across
the central great lakes through sunday. northwesterly flow
increases on sunday behind the front.


lhz361>363-130945-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
lake huron from presque isle light to sturgeon point mi beyond
5nm off shore-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
941 pm edt sat sep 12 2026

.rest of tonight...west winds 10 to 15 knots becoming 5 to
10 knots early in the morning. waves 1 to 3 feet. 
.sunday...northwest winds 5 to 10 knots becoming west 15 to
20 knots with gusts to around 30 knots. waves 1 to 3 feet
building to 4 to 6 feet late in the afternoon. waves occasionally
around 8 feet. 
.sunday night...northwest winds 20 to 25 knots with gusts to
around 30 knots decreasing to 10 to 15 knots. waves 5 to 7 feet.
waves occasionally around 10 feet. 
.monday...northwest winds 10 to 15 knots early in the morning
becoming light and variable. waves 3 to 5 feet subsiding to 1 to
3 feet in the late morning and afternoon. 
.monday night...southeast winds 5 to 10 knots increasing to 15 to
20 knots with gusts to around 30 knots by midnight...then
becoming south 20 to 25 knots with gusts to 35 knot gales after
midnight. showers after midnight. waves 1 to 3 feet building to
6 to 9 feet. waves occasionally around 12 feet. 
.tuesday...south winds to 30 knots with gusts to 40 knot gales
decreasing to 20 to 25 knots with gusts to 40 knot gales late in
the morning...then becoming southwest 10 to 15 knots late in the
afternoon. showers in the morning. rain showers likely late in
the morning. waves 8 to 12 feet subsiding to 2 to 4 feet late in
the evening. waves occasionally around 15 feet. 
.wednesday...north winds 5 to 10 knots early in the morning
becoming light and variable...then becoming northeast 5 to
10 knots by midnight. a chance of showers by midnight. waves
2 feet or less. 
.thursday...northeast winds 5 to 10 knots. a chance of showers
until afternoon. waves 2 feet or less. 


$$

fzus63 kdtx 130141
glflh 
expires:202609130945;;355456

open lake forecast for lake huron
national weather service detroit/pontiac mi
941 pm edt sat sep 12 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...low pressure, 29.30 inches, will continue to push
eastward over northern ontario as it drags a cold front across
the central great lakes through sunday. northwesterly flow
increases on sunday behind the front.


lhz462>464-130945-
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-
941 pm edt sat sep 12 2026

.rest of tonight...southwest winds 5 to 10 knots. waves 1 to
3 feet. 
.sunday...north winds 5 to 10 knots backing to the northwest
early in the afternoon...then becoming west 10 to 15 knots late
in the afternoon. a chance of showers in the afternoon. waves
1 to 3 feet. 
.sunday night...northwest winds 15 to 20 knots. waves 5 to
7 feet. waves occasionally around 10 feet. 
.monday...northwest winds 10 to 15 knots becoming light and
variable. waves 3 to 5 feet subsiding to 1 to 3 feet early in the
afternoon. 
.monday night...light and variable winds becoming southeast 10 to
15 knots by midnight...then becoming south 15 to 20 knots with
gusts to around 30 knots after midnight. waves 1 to 3 feet
building to 4 to 6 feet after midnight. waves occasionally around
8 feet. 
.tuesday...south winds 20 to 25 knots with gusts to 35 knot gales
becoming southwest 10 to 15 knots late in the afternoon. showers
likely...then a chance of showers late in the afternoon. waves
5 to 7 feet subsiding to 1 to 3 feet late in the evening. waves
occasionally around 10 feet. 
.wednesday...north winds 5 to 10 knots veering to the northeast
by midnight. a chance of showers early in the evening. rain
showers likely by midnight. waves 2 feet or less. 
.thursday...east winds 5 to 10 knots becoming north 10 to
15 knots. showers likely until afternoon. waves 1 to 3 feet. 


$$

fzus63 kmkx 130242
glflm 
expires:202609130915;;357216

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
942 pm cdt sat sep 12 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...

light to moderate northwest winds will prevail tonight and sunday
with occasional gusts to 25 knots over the lake sunday afternoon.
winds ease sunday night as high pressure around 30.3 inches moves
across the lake into monday morning. 

winds will then increase and veer to south-southwesterly monday 
afternoon into tuesday as low pressure around 29.4 inches 
develops over manitoba. gales appear likely monday night into the
first half of tuesday. a gale watch has been issued for the
northern two thirds of the open waters of lake michigan. 

periods of showers and thunderstorms will accompany the 
developing low from as early as monday evening into tuesday. winds
will trend northerly and weaken behind a cold front tuesday night
into wednesday.


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-
942 pm cdt sat sep 12 2026

sheboygan wi to pentwater mi north...

...gale watch in effect from monday evening through tuesday
afternoon...

.rest of tonight...northwest winds 15 to 25 kt diminishing to
10 to 20 kt. waves 2 to 4 ft. 
.sunday...northwest winds 10 to 20 kt increasing to 30 kt. waves
2 to 4 ft building to 3 to 5 ft. 
.sunday night...northwest winds to 30 kt becoming north 10 to
15 kt. waves 3 to 5 ft subsiding to 2 to 4 ft. 
.monday...northeast winds 10 to 15 kt veering to south 15 to
25 kt in the afternoon. waves 1 to 3 ft building to 3 to 5 ft. 
.monday night...south gales to 40 kt. chance of showers in the
evening, then showers overnight. waves 7 to 10 ft occasionally to
13 ft building to 10 to 14 ft occasionally to 18 ft. 
.tuesday...southwest gales to 40 kt diminishing to 30 kt in the
afternoon. showers in the morning, then chance of showers in the
afternoon. waves 10 to 14 ft occasionally to 18 ft subsiding to
7 to 10 ft occasionally to 13 ft. 
.tuesday night...northwest winds 15 to 25 kt becoming north 10 to
20 kt. waves 4 to 6 ft occasionally to 8 ft subsiding to 1 to
3 ft. 
.wednesday...northeast winds 10 to 20 kt diminishing to 10 to
15 kt. waves 1 to 3 ft. 
.thursday...northeast winds 10 to 20 kt becoming north 15 to
25 kt. chance of showers. waves 1 to 3 ft.  

$$

fzus63 kmkx 130242
glflm 
expires:202609130915;;357217

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
942 pm cdt sat sep 12 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...

light to moderate northwest winds will prevail tonight and sunday
with occasional gusts to 25 knots over the lake sunday afternoon.
winds ease sunday night as high pressure around 30.3 inches moves
across the lake into monday morning. 

winds will then increase and veer to south-southwesterly monday 
afternoon into tuesday as low pressure around 29.4 inches 
develops over manitoba. gales appear likely monday night into the
first half of tuesday. a gale watch has been issued for the
northern two thirds of the open waters of lake michigan. 

periods of showers and thunderstorms will accompany the 
developing low from as early as monday evening into tuesday. winds
will trend northerly and weaken behind a cold front tuesday night
into wednesday.


lmz669-671-673-675-870-872-874-876-130915-
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 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-
942 pm cdt sat sep 12 2026

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

...gale watch in effect from monday evening through tuesday
afternoon...

.rest of tonight...northwest winds 15 to 25 kt becoming north
10 to 20 kt. waves 2 to 4 ft. 
.sunday...north winds 10 to 20 kt becoming northwest 15 to 25 kt.
slight chance of showers in the afternoon. waves 3 to 5 ft
building to 4 to 6 ft occasionally to 8 ft. 
.sunday night...northwest winds 10 to 20 kt veering to northeast
10 to 15 kt. waves 4 to 6 ft occasionally to 8 ft subsiding to
3 to 5 ft. 
.monday...east winds 10 to 20 kt becoming southeast 15 to 25 kt.
waves 1 to 3 ft building to 3 to 5 ft. 
.monday night...southeast gales to 40 kt becoming south. showers
likely overnight. waves 7 to 10 ft occasionally to 13 ft building
to 10 to 14 ft occasionally to 18 ft. 
.tuesday...southwest gales to 35 kt diminishing to 30 kt. showers
likely. waves 10 to 14 ft occasionally to 18 ft subsiding to 6 to
9 ft occasionally to 12 ft. 
.tuesday night...northwest winds 10 to 15 kt becoming north 10 to
20 kt. chance of showers. waves 3 to 5 ft subsiding to 2 to 4 ft.
.wednesday...northeast winds 10 to 20 kt diminishing to 10 to
15 kt. chance of showers. waves 2 to 4 ft. 
.thursday...northeast winds 10 to 20 kt increasing to 15 to
25 kt. waves 3 to 5 ft.  

$$

fzus63 kmkx 121950
glflm 
expires:202609130315;;342563

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
250 pm cdt sat sep 12 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...

a cold front will move across lake michigan late this afternoon
with modest southwest winds shifting west northwest. modest
northwest winds will then prevail tonight and sunday until high 
pressure around 30.3 inches moves across the lake late sunday
night into monday morning. winds will increase and veer south- 
southwest monday night into tuesday as low pressure around 29.4 
inches develops over manitoba. gales appear likely during this 
time frame. periods of showers and thunderstorms will accompany 
the developing low from as early as monday evening into tuesday. 
winds will trend northerly and weaken behind a cold front tuesday 
night into wednesday.


lmz080-669-671-673-675-777-779-870-872-874-876-878-130315-
lake michigan from michigan city in to st. joseph mi 5 nm
offshore to mid lake-
lake michigan from sheboygan to port washington wi 5 nm offshore
to mid lake-
lake michigan from port washington to north point light wi 5 nm
offshore to mid lake-
lake michigan from north point light to wind point wi 5 nm
offshore to mid lake-
lake michigan from wind point wi to winthrop harbor il 5 nm
offshore to mid lake-
lake michigan from winthrop harbor to wilmette harbor il 5 nm
offshore to mid lake-
lake michigan from wilmette harbor il to michigan city in 5 nm
offshore to mid lake-
lake michigan from whitehall to pentwater mi 5 nm offshore to mid
lake-
lake michigan from grand haven to whitehall mi 5 nm offshore to
mid lake-
lake michigan from holland to grand haven mi 5 nm offshore to mid
lake-
lake michigan from south haven to holland mi 5 nm offshore to mid
lake-
lake michigan from st. joseph to south haven mi 5 nm offshore to
mid lake-
250 pm cdt sat sep 12 2026

sheboygan wi to pentwater mi south...

.tonight...northwest winds 10 to 20 kt becoming north. waves 3 to
5 ft. 
.sunday...north winds 10 to 20 kt becoming northwest 15 to 25 kt.
slight chance of showers in the afternoon. waves 4 to 6 ft
occasionally to 8 ft. 
.sunday night...northwest winds 10 to 20 kt becoming northeast
10 to 15 kt. waves 3 to 5 ft subsiding to 2 to 4 ft. 
.monday...east winds 10 to 20 kt becoming southeast 15 to 25 kt.
waves 1 to 3 ft building to 3 to 5 ft. 
.monday night...southeast gales to 40 kt becoming south. chance
of showers overnight. waves 6 to 9 ft occasionally to 12 ft
building to 10 to 14 ft occasionally to 18 ft. 
.tuesday...southwest gales to 35 kt diminishing to 30 kt. showers
likely in the morning, then chance of showers in the afternoon.
waves 10 to 14 ft occasionally to 18 ft subsiding to 6 to 9 ft
occasionally to 12 ft. 
.tuesday night...northwest winds 10 to 15 kt becoming north 10 to
20 kt. chance of showers and thunderstorms. waves 3 to 5 ft
subsiding to 1 to 3 ft. 
.wednesday...northeast winds 10 to 20 kt diminishing to 10 to
15 kt. chance of showers. waves 2 to 4 ft. 
.thursday...northeast winds 10 to 20 kt becoming north 15 to
25 kt. waves 3 to 5 ft.  

$$

fzus63 kmqt 130201
glfls 
expires:202609130800;;355767

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt sat sep 12 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 29.7 inch trough continues to shift east of lake superior tonight. 
30.0 inch ridging builds back in from the northern plains on sunday 
and strengthens to 30.2 inches through monday. a low averaging 29.4 
inches crosses northern ontario on tuesday, with a strong 30.4 inch 
high building over the lake on wednesday.




lsz264-130800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
1001 pm edt sat sep 12 2026

.rest of tonight...west winds 15 to 25 knots becoming northwest
10 to 20 knots late. waves 3 to 5 feet occasionally to 7 feet
subsiding to 2 to 4 feet. 
.sunday...northwest winds 15 to 25 knots backing west in the
afternoon, then veering northwest late. a slight chance of
showers through early afternoon. waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 2 to 4 feet. 
.sunday night...northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.monday...south winds 5 to 15 knots becoming southeast 15 to
25 knots by mid afternoon. a slight chance of showers by mid
afternoon. waves building to 1 to 3 feet. 
.monday night...south gales to 35 knots. showers. waves building
to 6 to 10 feet occasionally to 13 feet. 
.tuesday...west gales to 40 knots. waves subsiding to 4 to 7 feet
occasionally to 9 feet, then building to 7 to 10 feet
occasionally to 13 feet. 
.tuesday night...northwest winds 20 to 30 knots diminishing to
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.wednesday...north winds 5 to 15 knots veering south. waves calm
to 2 feet. 
.thursday...west winds 5 to 15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 130201
glfls 
expires:202609130800;;355768

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt sat sep 12 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 29.7 inch trough continues to shift east of lake superior tonight. 
30.0 inch ridging builds back in from the northern plains on sunday 
and strengthens to 30.2 inches through monday. a low averaging 29.4 
inches crosses northern ontario on tuesday, with a strong 30.4 inch 
high building over the lake on wednesday.




lsz265-130800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
1001 pm edt sat sep 12 2026

.rest of tonight...west winds 20 to 30 knots veering northwest
after midnight. waves 3 to 5 feet occasionally to 7 feet. 
.sunday...northwest winds 20 to 30 knots increasing to 30 knots
with a few gale force gusts to 35 knots possible in the
afternoon. a slight chance of showers through early afternoon.
waves subsiding to 2 to 4 feet, then building to 3 to 6 feet
occasionally to 8 feet. 
.sunday night...northwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. waves subsiding to calm to 2 feet.
.monday...south winds 10 to 20 knots becoming southeast 20 to
30 knots by mid afternoon. a slight chance of showers by mid
afternoon. waves building to 2 to 4 feet. 
.monday night...south gales to 40 knots. showers and a slight
chance of thunderstorms. waves building to 6 to 9 feet
occasionally to 11 feet, then subsiding to 4 to 7 feet
occasionally to 9 feet. 
.tuesday...southwest gales to 35 knots becoming west gales to
40 knots 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. 
.tuesday night...northwest gales to 35 knots diminishing to 10 to
20 knots after midnight. waves subsiding to calm to 2 feet. 
.wednesday...east winds 5 to 15 knots becoming southeast 10 to
20 knots. a chance of showers. waves calm to 2 feet. 
.thursday...west winds 10 to 20 knots veering north. waves calm
to 2 feet. 

$$

fzus63 kmqt 130201
glfls 
expires:202609130800;;355769

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt sat sep 12 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 29.7 inch trough continues to shift east of lake superior tonight. 
30.0 inch ridging builds back in from the northern plains on sunday 
and strengthens to 30.2 inches through monday. a low averaging 29.4 
inches crosses northern ontario on tuesday, with a strong 30.4 inch 
high building over the lake on wednesday.




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-
1001 pm edt sat sep 12 2026

.rest of tonight...west winds 20 to 30 knots veering northwest
after midnight, then diminishing to 15 to 25 knots late. waves
3 to 6 feet occasionally to 8 feet. 
.sunday...northwest winds 15 to 25 knots increasing to 30 knots
with a few gale force gusts to 35 knots possible in the
afternoon. a chance of showers. waves building to 4 to 7 feet
occasionally to 9 feet. 
.sunday night...northwest winds 20 to 30 knots diminishing to
5 to 15 knots. waves subsiding to calm to 2 feet. 
.monday...south winds 5 to 15 knots becoming southeast 20 to
30 knots by mid afternoon. waves building to 2 to 4 feet. 
.monday night...south gales to 40 knots. showers. a slight chance
of thunderstorms after midnight. waves building to 7 to 10 feet
occasionally to 13 feet. 
.tuesday...southwest gales to 35 knots becoming west gales to
40 knots by mid afternoon. waves subsiding to 5 to 8 feet
occasionally to 10 feet, then building to 6 to 9 feet
occasionally to 11 feet. 
.tuesday night...northwest gales to 35 knots becoming north 10 to
20 knots after midnight. waves subsiding to 1 to 3 feet. 
.wednesday...north winds 5 to 15 knots veering east. waves
subsiding to calm to 2 feet. 
.thursday...northwest winds 10 to 20 knots veering north. waves
calm to 2 feet. 

$$

fzus63 kmqt 130201
glfls 
expires:202609130800;;355770

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt sat sep 12 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 29.7 inch trough continues to shift east of lake superior tonight. 
30.0 inch ridging builds back in from the northern plains on sunday 
and strengthens to 30.2 inches through monday. a low averaging 29.4 
inches crosses northern ontario on tuesday, with a strong 30.4 inch 
high building over the lake on wednesday.




lsz267-130800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
1001 pm edt sat sep 12 2026

.rest of tonight...west winds 15 to 25 knots becoming northwest
20 to 30 knots after midnight, then diminishing to 15 to 25 knots
late. waves 3 to 6 feet occasionally to 8 feet. 
.sunday...northwest winds 15 to 25 knots increasing to 30 knots
with a few gale force gusts to 35 knots possible. a chance of
showers. a slight chance of thunderstorms by mid afternoon. waves
subsiding to 3 to 5 feet occasionally to 7 feet, then building to
5 to 8 feet occasionally to 10 feet. 
.sunday night...northwest winds 20 to 30 knots diminishing to
10 to 20 knots. waves subsiding to 1 to 3 feet. 
.monday...northwest winds 5 to 15 knots backing southeast by mid
afternoon. waves subsiding to calm to 2 feet. 
.monday night...south winds 20 to 30 knots increasing to gales to
40 knots after midnight. showers. waves building to 6 to 9 feet
occasionally to 11 feet. 
.tuesday...southwest gales to 35 knots becoming west 20 to
30 knots by mid afternoon. a chance of showers through early
afternoon. waves subsiding to 3 to 6 feet occasionally to 8 feet,
then building to 4 to 7 feet occasionally to 9 feet. 
.tuesday night...west winds 20 to 30 knots becoming north 10 to
20 knots after midnight. waves building to 5 to 8 feet
occasionally to 10 feet, then subsiding to 2 to 4 feet. 
.wednesday...north winds 5 to 15 knots. a chance of showers.
waves subsiding to calm to 2 feet. 
.thursday...northwest winds 10 to 20 knots veering north. waves
calm to 2 feet. 

$$

fzus63 kmqt 130201
glfls 
expires:202609130800;;355766

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt sat sep 12 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 29.7 inch trough continues to shift east of lake superior tonight. 
30.0 inch ridging builds back in from the northern plains on sunday 
and strengthens to 30.2 inches through monday. a low averaging 29.4 
inches crosses northern ontario on tuesday, with a strong 30.4 inch 
high building over the lake on wednesday.




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-
1001 pm edt sat sep 12 2026

.rest of tonight...west winds 15 to 25 knots veering northwest
after midnight. waves 3 to 5 feet occasionally to 7 feet. 
.sunday...northwest winds 15 to 25 knots becoming west 20 to
30 knots in the afternoon, then diminishing to 15 to 25 knots
late. waves subsiding to 2 to 4 feet, then building to 3 to
5 feet occasionally to 7 feet. 
.sunday night...northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight, then backing west late. waves
subsiding to calm to 2 feet. 
.monday...south winds 15 to 25 knots becoming southeast 20 to
30 knots by mid afternoon. a chance of showers by mid afternoon.
waves calm to 2 feet. 
.monday night...south gales to 35 knots veering southwest after
midnight. showers and a slight chance of thunderstorms through
midnight, then a chance of showers after midnight. waves building
to 5 to 8 feet occasionally to 10 feet, then subsiding to 3 to
6 feet occasionally to 8 feet. 
.tuesday...west gales to 40 knots. waves building to 7 to 10 feet
occasionally to 13 feet, then subsiding to 4 to 7 feet
occasionally to 9 feet. 
.tuesday night...northwest winds 20 to 30 knots diminishing to
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.wednesday...east winds 5 to 15 knots veering south. waves calm
to 2 feet. 
.thursday...west winds 10 to 20 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 130201
glfls 
expires:202609130800;;355765

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt sat sep 12 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 29.7 inch trough continues to shift east of lake superior tonight. 
30.0 inch ridging builds back in from the northern plains on sunday 
and strengthens to 30.2 inches through monday. a low averaging 29.4 
inches crosses northern ontario on tuesday, with a strong 30.4 inch 
high building over the lake on wednesday.




lsz162-130800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 pm edt sat sep 12 2026 /901 pm cdt sat sep 12 2026/

.rest of tonight...west winds 15 to 25 knots diminishing to 10 to
20 knots late. waves 1 to 3 feet. 
.sunday...west winds 15 to 25 knots becoming northwest 10 to
20 knots late. waves subsiding to calm to 2 feet. 
.sunday night...northwest winds 5 to 15 knots diminishing to less
than 10 knots late. waves calm to 2 feet. 
.monday...south winds 5 to 15 knots becoming southeast 15 to
25 knots by mid afternoon. showers likely by mid afternoon. waves
calm to 2 feet. 
.monday night...southeast gales to 35 knots veering southwest
after midnight. showers and a slight chance of thunderstorms
through midnight, then a slight chance of showers after midnight.
waves building to 4 to 7 feet occasionally to 9 feet, then
subsiding to 3 to 6 feet occasionally to 8 feet. 
.tuesday...west gales to 35 knots diminishing to 20 to 30 knots
by mid afternoon. waves subsiding to 2 to 4 feet. 
.tuesday night...northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.wednesday...east winds 5 to 15 knots. waves calm to 2 feet. 
.thursday...west winds 5 to 15 knots veering northeast. waves
calm to 2 feet. 

$$