fzus61 kbuf 120202
glflo 
expires:202609120900;;300718

open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt fri sep 11 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...a high pressure ridge averaging 30.0 inches exits 
toward new england through saturday. a warm front will sweep 
northeastward across the lake saturday evening before a cold front 
sweeps eastward across the lake on sunday. behind the cold front, a 
ridge averaging 30.2 inches will slide eastward across the lower 
great lakes through monday. the ridge should exit toward new england 
on tuesday and allow a warm front to sweep northeastward across the 
lake. on wednesday, a cold front should sweep eastward across the 
lake and be followed by a ridge averaging 30.1 inches and building 
from the upper midwest.


loz062-120900-
lake ontario open waters from the niagara river to hamlin beach-
1002 pm edt fri sep 11 2026

.overnight...southeast winds 10 knots or less. waves 1 foot
or less. 
.saturday...south winds 5 to 10 knots becoming east. waves 1 foot
or less. 
.saturday night...southeast winds 5 to 15 knots becoming
southwest. waves 2 feet or less. 
.sunday...west winds 5 to 15 knots. waves 1 to 2 feet. 
.sunday night...northwest winds 15 to 20 knots. a chance of
showers. waves 1 to 3 feet. 
.monday...north winds 15 to 20 knots becoming southeast 5 to
15 knots. waves 1 to 3 feet. 
.tuesday...south winds 5 to 15 knots becoming southwest. showers
likely tuesday night. waves 1 to 3 feet building to 2 to 4 feet,
then subsiding to 1 to 3 feet. 
.wednesday...southwest winds 10 knots or less becoming north. a
chance of showers. waves 2 feet or less. 

$$

fzus61 kbuf 120202
glflo 
expires:202609120900;;300719

open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt fri sep 11 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...a high pressure ridge averaging 30.0 inches exits 
toward new england through saturday. a warm front will sweep 
northeastward across the lake saturday evening before a cold front 
sweeps eastward across the lake on sunday. behind the cold front, a 
ridge averaging 30.2 inches will slide eastward across the lower 
great lakes through monday. the ridge should exit toward new england 
on tuesday and allow a warm front to sweep northeastward across the 
lake. on wednesday, a cold front should sweep eastward across the 
lake and be followed by a ridge averaging 30.1 inches and building 
from the upper midwest.


loz063>065-120900-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 pm edt fri sep 11 2026

.overnight...south winds 10 knots or less. waves 1 foot or
less. 
.saturday...southeast winds 5 to 15 knots. waves 1 to 3 feet. 
.saturday night...south winds 15 to 20 knots becoming southwest.
a chance of showers. waves 2 to 4 feet. 
.sunday...southwest winds 10 to 15 knots becoming west. a chance
of showers in the afternoon. waves 1 to 3 feet. 
.sunday night...west winds 15 to 20 knots becoming northwest. a
chance of showers. waves 2 to 4 feet. 
.monday...northwest winds 15 to 20 knots becoming southeast 5 to
15 knots. waves 1 to 3 feet. 
.tuesday...south winds 15 to 20 knots. a chance of showers
tuesday night. waves 3 to 5 feet subsiding to 1 to 3 feet. 
.wednesday...southwest winds 15 to 20 knots becoming north and
diminishing to 10 knots or less. a chance of showers. waves 1 to
3 feet subsiding to 1 foot or less. 

$$

fzus61 kcle 120752
glfle 
expires:202609121415;;314462

open lake forecast for lake erie
national weather service cleveland oh
352 am edt sat sep 12 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 warm front will lift across the region today before a cold 
front follows across the area on sunday. high pressure 30.30 will
move over the lake on monday and exit east on tuesday. a cold
front will approach the lake on tuesday night and settle south of
the lake for wednesday.


lez164>167-121415-
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-
352 am edt sat sep 12 2026

.today...south winds 5 to 10 knots becoming southwest. a slight
chance of showers early, then a chance of showers late this
morning. a chance of showers with a slight chance of
thunderstorms this afternoon. waves 1 to 2 feet. 
.tonight...southwest winds 10 to 15 knots. a slight chance of
showers and thunderstorms early. waves 1 to 3 feet building to
2 to 4 feet. 
.sunday...west winds 5 to 15 knots. waves 1 to 3 feet. 
.sunday night...northwest winds 15 to 25 knots becoming north.
waves 1 to 3 feet building to 3 to 6 feet. 
.monday...north winds 15 to 20 knots becoming southeast. waves
3 to 5 feet subsiding to 1 to 3 feet. 
.tuesday...south winds 15 to 20 knots becoming southwest 10 to
15 knots. showers likely tuesday night. waves 2 to 4 feet
subsiding to 1 to 3 feet. 
.wednesday...southwest winds 5 to 15 knots. a chance of showers
during the day, then showers likely with a chance of
thunderstorms wednesday night. waves 2 feet or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 120752
glfle 
expires:202609121415;;314463

open lake forecast for lake erie
national weather service cleveland oh
352 am edt sat sep 12 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 warm front will lift across the region today before a cold 
front follows across the area on sunday. high pressure 30.30 will
move over the lake on monday and exit east on tuesday. a cold
front will approach the lake on tuesday night and settle south of
the lake for wednesday.


lez061-168-169-121415-
ripley to buffalo ny extending from 5nm off shoreline to us-
canadian border-geneva-on-the-
lake to conneaut oh beyond 5 nm off shoreline to us-
canadian border-
conneaut oh to ripley ny beyond 5 nm off shoreline to us-
canadian border-
352 am edt sat sep 12 2026

.today...south winds 5 to 10 knots becoming southwest. a chance
of showers early this afternoon. a chance of showers and
thunderstorms late. waves 2 feet or less. 
.tonight...southwest winds 10 to 15 knots. a chance of showers
and thunderstorms in the evening, then a chance of showers after
midnight. waves 1 to 3 feet. 
.sunday...west winds 5 to 15 knots. waves 1 to 3 feet. 
.sunday night...northwest winds 15 to 20 knots becoming north.
waves 2 to 3 feet building to 3 to 5 feet. 
.monday...north winds 15 to 20 knots becoming southeast 5 to
15 knots. waves 3 to 5 feet subsiding to 2 feet or less. 
.tuesday...south winds 15 to 20 knots becoming southwest 10 to
15 knots. a chance of showers tuesday night. waves 1 to 3 feet. 
.wednesday...south winds 10 knots or less becoming southwest. a
chance of showers during the day, then showers likely with a
chance of thunderstorms wednesday night. waves 2 feet or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 120752
glfle 
expires:202609121415;;314461

open lake forecast for lake erie
national weather service cleveland oh
352 am edt sat sep 12 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 warm front will lift across the region today before a cold 
front follows across the area on sunday. high pressure 30.30 will
move over the lake on monday and exit east on tuesday. a cold
front will approach the lake on tuesday night and settle south of
the lake for wednesday.


lez162-163-121415-
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-
352 am edt sat sep 12 2026

.today...south winds around 10 knots. a chance of showers this
morning, then a slight chance of showers early this afternoon. a
slight chance of showers and thunderstorms late. waves 1 foot or
less. 
.tonight...south winds 10 to 15 knots becoming west. a slight
chance of showers and thunderstorms early. waves 1 to 2 feet. 
.sunday...west winds 5 to 15 knots becoming northwest. waves
2 feet or less. 
.sunday night...northwest winds 15 to 20 knots becoming north.
waves 1 to 3 feet building to 2 to 4 feet. 
.monday...north winds 15 to 20 knots becoming southeast. waves
2 to 4 feet subsiding to 1 to 3 feet. 
.tuesday...south winds 15 to 20 knots becoming southwest 5 to
15 knots. showers likely tuesday night. waves 1 to 3 feet
subsiding to 1 foot or less. 
.wednesday...south winds 5 to 15 knots becoming southwest. a
chance of showers and thunderstorms during the day, then showers
likely with a chance of thunderstorms wednesday night. waves
2 feet or less. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 120728
glflh 
expires:202609121530;;313902

open lake forecast for lake huron
national weather service detroit/pontiac mi
328 am 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...high pressure, 30.00 inches, will slowly move eastward
towards the east coast today. low pressure, 29.30 inches, lifting
over northern ontario then drags a cold front across the central
great lakes late saturday into sunday.


lhz361>363-121530-
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-
328 am edt sat sep 12 2026

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


$$

fzus63 kdtx 120728
glflh 
expires:202609121530;;313903

open lake forecast for lake huron
national weather service detroit/pontiac mi
328 am 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...high pressure, 30.00 inches, will slowly move eastward
towards the east coast today. low pressure, 29.30 inches, lifting
over northern ontario then drags a cold front across the central
great lakes late saturday into sunday.


lhz462>464-121530-
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-
328 am edt sat sep 12 2026

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


$$

fzus63 kdtx 120727
glfsc 
expires:202609121530;;313829

lake st clair forecast
national weather service detroit/pontiac mi
327 am edt sat sep 12 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, 30.00 inches, will slowly move eastward
towards the east coast today. low pressure, 29.30 inches, lifting
over northern ontario then drags a cold front across the central
great lakes late saturday into sunday.


lcz460-121530-
lake st clair-
327 am edt sat sep 12 2026

.today...south winds 5 to 10 knots increasing to 10 to 15 knots in
the afternoon. mostly cloudy. waves 2 feet or less.
.tonight...southwest winds 5 to 10 knots veering to the west after
midnight. partly cloudy. waves 2 feet or less.
.sunday...north winds 5 to 10 knots becoming northwest 10 to 15
knots early in the afternoon. partly sunny. waves 2 feet or less.
.sunday night...northwest winds 15 to 20 knots increasing to 20 to
25 knots by midnight...then becoming north 15 to 20 knots after
midnight. mostly cloudy becoming partly cloudy by midnight becoming
clear. waves 1 to 3 feet.
.monday...north winds 10 to 15 knots becoming northeast 5 to 10
knots in the afternoon...then becoming southeast 10 to 15 knots in
the evening. sunny becoming mostly sunny in the afternoon becoming
partly cloudy. waves 2 feet or less.
.tuesday...southwest winds 15 to 20 knots. partly cloudy. showers
likely. waves 1 to 3 feet.
.wednesday...northeast winds 5 to 10 knots. mostly cloudy with
showers likely. waves 2 feet or less.

$$

fzus63 kmkx 120216
glflm 
expires:202609120930;;301615

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
916 pm cdt fri sep 11 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...

southerly winds will continue to increase overnight, as a cold
front approaches the region from the west. winds will shift out 
of the west northwest during the day saturday, as the cold front 
moves across the lake. expecting wind gusts to remain primarily in
the 25 to 30 knot range overnight through saturday, though a few
gusts approaching gale force may occur. currently anticipating 
any such gusts to remain brief and isolated enough to preclude the
need for gale warnings, but will continue to monitor trends. 
isolated showers and thunderstorms are possible ahead of the 
approaching cold front, mainly over northern portions of the lake. 

high pressure around 30.2 inches will build in from the northern 
great plains sunday night into monday, bringing decreasing winds 
saturday night through sunday, and light and variable winds 
sunday night into monday. the high will move east of the waters 
monday afternoon and evening, resulting in a south southeast wind
shift. 

winds will increase further and veer south southwest monday night
into tuesday, as low pressure around 29.4 inches develops over 
manitoba. gales continue to appear likely during this time frame, 
with headlines becoming necessary in later forecasts if trends 
continue to hold. periods of showers and thunderstorms will 
accompany the developing low from as early as monday evening 
through at least tuesday afternoon. widespread severe weather 
hazards appear low over lake michigan at this time, though an 
isolated stronger storm with gusty winds may occur. winds will 
trend northerly behind a cold front tuesday night into wednesday, 
steadily tapering away from gale force thresholds in the process.


lmz261-362-364-366-563-565-567-868-120930-
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-
916 pm cdt fri sep 11 2026

sheboygan wi to pentwater mi north...

.rest of tonight...south winds to 30 kt diminishing to 15 to
25 kt. waves 4 to 6 ft occasionally to 8 ft. 
.saturday...south winds to 30 kt veering to west. slight chance
of showers in the morning, then chance of showers in the
afternoon. waves 4 to 7 ft occasionally to 9 ft subsiding to 4 to
6 ft occasionally to 8 ft. 
.saturday night...northwest winds 10 to 20 kt. waves 2 to 4 ft. 
.sunday...northwest winds 10 to 20 kt increasing to 15 to 25 kt.
waves 2 to 4 ft. 
.sunday night...north winds 10 to 20 kt becoming northeast 10 to
15 kt. waves 2 to 4 ft. 
.monday...east winds 15 to 25 kt becoming southeast gales to
35 kt in the afternoon. waves 1 to 3 ft building to 4 to 7 ft
occasionally to 9 ft. 
.monday night...south gales to 40 kt. showers. waves 12 to 16 ft
occasionally to 21 ft. 
.tuesday...southwest gales to 40 kt becoming west gales to 35 kt.
chance of showers. waves 12 to 16 ft occasionally to 21 ft
subsiding to 8 to 11 ft occasionally to 14 ft. 
.wednesday...northeast winds 10 to 20 kt. waves 1 to 3 ft.  

$$

fzus63 kmkx 120216
glflm 
expires:202609120930;;301616

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
916 pm cdt fri sep 11 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...

southerly winds will continue to increase overnight, as a cold
front approaches the region from the west. winds will shift out 
of the west northwest during the day saturday, as the cold front 
moves across the lake. expecting wind gusts to remain primarily in
the 25 to 30 knot range overnight through saturday, though a few
gusts approaching gale force may occur. currently anticipating 
any such gusts to remain brief and isolated enough to preclude the
need for gale warnings, but will continue to monitor trends. 
isolated showers and thunderstorms are possible ahead of the 
approaching cold front, mainly over northern portions of the lake. 

high pressure around 30.2 inches will build in from the northern 
great plains sunday night into monday, bringing decreasing winds 
saturday night through sunday, and light and variable winds 
sunday night into monday. the high will move east of the waters 
monday afternoon and evening, resulting in a south southeast wind
shift. 

winds will increase further and veer south southwest monday night
into tuesday, as low pressure around 29.4 inches develops over 
manitoba. gales continue to appear likely during this time frame, 
with headlines becoming necessary in later forecasts if trends 
continue to hold. periods of showers and thunderstorms will 
accompany the developing low from as early as monday evening 
through at least tuesday afternoon. widespread severe weather 
hazards appear low over lake michigan at this time, though an 
isolated stronger storm with gusty winds may occur. winds will 
trend northerly behind a cold front tuesday night into wednesday, 
steadily tapering away from gale force thresholds in the process.


lmz080-669-671-673-675-777-779-870-872-874-876-878-120930-
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-
916 pm cdt fri sep 11 2026

sheboygan wi to pentwater mi south...

.rest of tonight...southeast winds 10 to 20 kt becoming south
15 to 25 kt. waves 3 to 5 ft. 
.saturday...south winds 15 to 25 kt becoming southwest 10 to
20 kt. waves 4 to 6 ft occasionally to 8 ft. 
.saturday night...northwest winds 10 to 20 kt becoming north.
waves 3 to 5 ft. 
.sunday...north winds 10 to 20 kt. waves 3 to 5 ft. 
.sunday night...north winds 10 to 20 kt becoming northeast. waves
3 to 5 ft subsiding to 2 to 4 ft. 
.monday...east winds to 30 kt becoming southeast gales to 40 kt
in the afternoon. waves 3 to 5 ft building to 4 to 7 ft
occasionally to 9 ft. 
.monday night...southeast gales to 40 kt becoming south. chance
of showers. waves 8 to 12 ft occasionally to 16 ft building to
10 to 14 ft occasionally to 18 ft. 
.tuesday...southwest gales to 35 kt becoming west to 30 kt.
showers likely. waves 10 to 14 ft occasionally to 18 ft subsiding
to 7 to 10 ft occasionally to 13 ft. 
.wednesday...northeast winds 10 to 20 kt. chance of showers.
waves 2 to 4 ft.  

$$

fzus63 kmqt 120801
glfls 
expires:202609122000;;314631

open lake forecast for lake superior
national weather service marquette mi
400 am 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 29.6 inch trough tracks across the lake this morning through the 
afternoon, accompanied by a cold front. 30.0 inch ridging builds 
back in from the northern plains on sunday and strengthens to 30.2 
inches on monday. a 29.5 to 29.7 inch low crosses northern ontario 
on tuesday. 




lsz264-122000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
401 am edt sat sep 12 2026

.early this morning...southwest winds 20 to 30 knots. a chance of
showers and a slight chance of thunderstorms. waves 2 to 4 feet. 
.today...west winds 15 to 25 knots increasing to 20 to 30 knots
in the afternoon. a slight chance of showers through early
afternoon. waves building to 3 to 6 feet occasionally to 8 feet. 
.tonight...west winds 15 to 25 knots veering northwest after
midnight, then diminishing to 10 to 20 knots late. waves
subsiding to 2 to 4 feet. 
.sunday...northwest winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. waves subsiding to 1 to 3 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 20 to
30 knots by mid afternoon. waves building to 2 to 4 feet. 
.monday night...southeast gales to 35 knots veering south after
midnight. showers through midnight, then a chance of showers
after midnight. waves building to 7 to 10 feet occasionally to
13 feet, then subsiding to 5 to 8 feet occasionally to 10 feet. 
.tuesday...west gales to 40 knots becoming northwest 15 to
25 knots. waves subsiding to 4 to 8 feet occasionally to 10 feet.
.wednesday...north winds 5 to 15 knots backing northwest. waves
calm to 2 feet. 

$$

fzus63 kmqt 120801
glfls 
expires:202609122000;;314632

open lake forecast for lake superior
national weather service marquette mi
400 am 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 29.6 inch trough tracks across the lake this morning through the 
afternoon, accompanied by a cold front. 30.0 inch ridging builds 
back in from the northern plains on sunday and strengthens to 30.2 
inches on monday. a 29.5 to 29.7 inch low crosses northern ontario 
on tuesday. 




lsz265-122000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
401 am edt sat sep 12 2026

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

$$

fzus63 kmqt 120801
glfls 
expires:202609122000;;314634

open lake forecast for lake superior
national weather service marquette mi
400 am 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 29.6 inch trough tracks across the lake this morning through the 
afternoon, accompanied by a cold front. 30.0 inch ridging builds 
back in from the northern plains on sunday and strengthens to 30.2 
inches on monday. a 29.5 to 29.7 inch low crosses northern ontario 
on tuesday. 




lsz267-122000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
401 am edt sat sep 12 2026

.early this morning...south winds 20 to 30 knots. a chance of
showers. waves 2 to 4 feet. 
.today...south winds 20 to 30 knots veering west in the
afternoon. a chance of showers through early afternoon. waves
building to 3 to 5 feet occasionally to 7 feet, then subsiding to
2 to 4 feet. 
.tonight...west winds 20 to 30 knots veering northwest after
midnight, then diminishing to 15 to 25 knots late. waves building
to 3 to 6 feet occasionally to 8 feet. 
.sunday...northwest winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon. a slight chance of showers. waves
building to 4 to 7 feet occasionally to 9 feet. 
.sunday night...northwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. waves subsiding to 1 to 3 feet. 
.monday...northwest winds 5 to 15 knots becoming southeast 10 to
20 knots by mid afternoon. waves subsiding to calm to 2 feet. 
.monday night...south gales to 40 knots. showers. waves building
to 7 to 10 feet occasionally to 13 feet. 
.tuesday...west gales to 40 knots becoming northwest 15 to
25 knots. a chance of showers. waves subsiding to 2 to 4 feet. 
.wednesday...north winds 5 to 15 knots becoming northwest 10 to
20 knots. a chance of showers. waves subsiding to calm to 2 feet.

$$