fzus61 kbuf 131401
glflo 
expires:202609132100;;383209

open lake forecast for lake ontario
national weather service buffalo ny
1001 am edt sun sep 13 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 cold front moves eastward across the lake today. 
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. a cold front should sweep 
eastward across the lake on wednesday and be followed by a ridge 
averaging 30.1 inches and building from the upper midwest through 
thursday.


loz062-132100-
lake ontario open waters from the niagara river to hamlin beach-
1001 am edt sun sep 13 2026

.this afternoon...west winds 5 to 15 knots. waves 2 feet or less. 
.tonight...northwest winds 15 to 20 knots. a chance of showers
late in the evening. waves 1 to 3 feet building to 3 to 5 feet. 
.monday...north winds 5 to 15 knots becoming west less than
10 knots. waves 2 to 4 feet subsiding to 1 foot or less. 
.monday night...west winds 10 knots or less becoming south 10 to
15 knots. waves 2 feet or less. 
.tuesday...south winds 10 to 15 knots becoming southwest. showers
likely tuesday night. waves 2 feet or less. 
.wednesday...northwest winds 10 knots or less becoming northeast.
showers likely during the day. waves 2 feet or less. 
.thursday...east winds 5 to 15 knots becoming northeast. a chance
of showers. waves 1 to 2 feet. 

$$

fzus61 kbuf 131401
glflo 
expires:202609132100;;383210

open lake forecast for lake ontario
national weather service buffalo ny
1001 am edt sun sep 13 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 cold front moves eastward across the lake today. 
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. a cold front should sweep 
eastward across the lake on wednesday and be followed by a ridge 
averaging 30.1 inches and building from the upper midwest through 
thursday.


loz063>065-132100-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1001 am edt sun sep 13 2026

.this afternoon...southwest winds 5 to 15 knots becoming west. a
chance of showers late. waves 1 to 3 feet. 
.tonight...west winds 15 to 20 knots becoming northwest. a chance
of showers late in the evening. waves 1 to 3 feet building to
3 to 6 feet. 
.monday...north winds 15 to 20 knots becoming northwest and
diminishing to 5 to 10 knots. waves 3 to 5 feet subsiding to 1 to
3 feet. 
.monday night...northwest winds 10 knots or less becoming south
10 to 15 knots. waves 1 foot or less. 
.tuesday...south winds 15 to 25 knots. showers likely tuesday
night. waves 2 to 4 feet building to 3 to 5 feet. 
.wednesday...southwest winds 5 to 15 knots becoming northeast.
showers likely during the day, then a chance of showers wednesday
night. waves 1 to 3 feet subsiding to 1 foot or less. 
.thursday...east winds 5 to 15 knots becoming north. a chance of
showers. waves 2 feet or less. 

$$

fzus61 kcle 131323
glfle 
expires:202609132015;;382354

open lake forecast for lake erie
national weather service cleveland oh
923 am edt sun sep 13 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 cold front will approach the lake today and cross the lake by
this evening with pressure 29.90 inches. high pressure 30.30 
inches will build over the lake for monday and depart to the east 
for tuesday. a cold front will enter for tuesday night and wash 
out south of the lake for the middle of the week.


lez162-163-132015-
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-
923 am edt sun sep 13 2026

.this afternoon...northwest winds 5 to 15 knots. waves 2 feet or
less. 
.tonight...northwest winds 15 to 20 knots becoming north. waves
2 to 4 feet building to 3 to 5 feet, then subsiding to 2 to
4 feet. 
.monday...north winds 15 to 20 knots becoming east and
diminishing to less than 10 knots in the afternoon. waves 1 to
3 feet subsiding to 1 foot or less. 
.monday night...southeast winds 5 to 15 knots becoming south
15 to 20 knots. waves 1 to 3 feet. 
.tuesday...south winds 15 to 20 knots becoming west 5 to
15 knots. a chance of showers during the day, then showers with a
chance of thunderstorms tuesday night. waves 2 to 4 feet
subsiding to 1 foot or less. 
.wednesday...north winds 5 to 10 knots becoming northeast. a
chance of showers. waves 1 foot or less. 
.thursday...southeast winds 5 to 15 knots becoming north. showers
likely during the day, then a chance of showers thursday night.
waves 1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 131323
glfle 
expires:202609132015;;382356

open lake forecast for lake erie
national weather service cleveland oh
923 am edt sun sep 13 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 cold front will approach the lake today and cross the lake by
this evening with pressure 29.90 inches. high pressure 30.30 
inches will build over the lake for monday and depart to the east 
for tuesday. a cold front will enter for tuesday night and wash 
out south of the lake for the middle of the week.


lez061-169-132015-
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-
923 am edt sun sep 13 2026

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

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 131323
glfle 
expires:202609132015;;382355

open lake forecast for lake erie
national weather service cleveland oh
923 am edt sun sep 13 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 cold front will approach the lake today and cross the lake by
this evening with pressure 29.90 inches. high pressure 30.30 
inches will build over the lake for monday and depart to the east 
for tuesday. a cold front will enter for tuesday night and wash 
out south of the lake for the middle of the week.


lez164>168-132015-
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-
923 am edt sun sep 13 2026

.this afternoon...west winds around 10 knots increasing to 15 to
20 knots. waves 1 to 3 feet. 
.tonight...northwest winds 15 to 25 knots becoming north. waves
3 to 6 feet. 
.monday...north winds 15 to 20 knots becoming northeast and
diminishing to less than 10 knots in the afternoon. waves 3 to
5 feet subsiding to 1 to 3 feet. 
.monday night...east winds 5 to 15 knots becoming southeast 15 to
20 knots. waves 1 to 3 feet. 
.tuesday...south winds 15 to 20 knots becoming southwest 10 to
15 knots. showers with a chance of thunderstorms tuesday night.
waves 2 to 4 feet subsiding to 1 to 3 feet. 
.wednesday...northwest winds 5 to 10 knots becoming east. a
chance of showers. waves 1 to 2 feet. 
.thursday...east winds 5 to 15 knots becoming north. a chance of
showers. waves 1 to 3 feet building to 2 to 4 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 131351
glflh 
expires:202609132200;;382869

open lake forecast for lake huron
national weather service detroit/pontiac mi
951 am edt sun sep 13 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...post-frontal northwest flow becomes breezy this
afternoon through monday morning with scattered showers possible.
high pressure, 30.20 inches, then arrives monday bringing relaxed
flow and dry weather. low pressure, 29.40 inches, then tracks
across ontario tuesday which elevates wind gusts toward gale
force across north and central lake huron.


lhz462>464-132200-
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 am edt sun sep 13 2026

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


$$

fzus63 kdtx 131351
glfsc 
expires:202609132200;;382871

lake st clair forecast
national weather service detroit/pontiac mi
951 am edt sun sep 13 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...post-frontal northwest flow becomes breezy this
afternoon through monday morning with scattered showers possible.
high pressure, 30.20 inches, then arrives monday bringing relaxed
flow and dry weather. low pressure, 29.40 inches, then tracks
across ontario tuesday which elevates wind gusts toward gale
force across north and central lake huron.


lcz460-132200-
lake st clair-
951 am edt sun sep 13 2026

...small craft advisory in effect from 4 pm edt this afternoon
through late tonight...

.rest of today...west winds 5 to 10 knots becoming northwest 15 to
20 knots late in the afternoon. partly sunny. waves 2 feet or less.
.tonight...northwest winds 20 to 25 knots becoming north 15 to 20
knots after midnight. partly cloudy in the evening then clearing.
waves 1 to 3 feet.
.monday...north winds 10 to 15 knots diminishing to 5 to 10 knots in
the late morning and early afternoon...then becoming light and
variable early in the afternoon. sunny. waves 2 feet or less.
.monday night...southeast winds 5 to 10 knots becoming south 20 to
25 knots. partly cloudy. waves 2 feet or less.
.tuesday...south winds 20 to 25 knots becoming southwest 10 to 15
knots. partly sunny. a chance of light showers. light showers in the
evening. waves 1 to 3 feet.
.wednesday...northeast winds 10 to 15 knots. mostly cloudy with
light showers. waves 2 feet or less.
.thursday...north winds 10 to 15 knots. mostly cloudy with showers
likely. waves 2 feet or less.

$$

fzus63 kdtx 131351
glflh 
expires:202609132200;;382867

open lake forecast for lake huron
national weather service detroit/pontiac mi
951 am edt sun sep 13 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...post-frontal northwest flow becomes breezy this
afternoon through monday morning with scattered showers possible.
high pressure, 30.20 inches, then arrives monday bringing relaxed
flow and dry weather. low pressure, 29.40 inches, then tracks
across ontario tuesday which elevates wind gusts toward gale
force across north and central lake huron.


lhz361-132200-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
951 am edt sun sep 13 2026

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


$$

fzus63 kdtx 131351
glflh 
expires:202609132200;;382868

open lake forecast for lake huron
national weather service detroit/pontiac mi
951 am edt sun sep 13 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...post-frontal northwest flow becomes breezy this
afternoon through monday morning with scattered showers possible.
high pressure, 30.20 inches, then arrives monday bringing relaxed
flow and dry weather. low pressure, 29.40 inches, then tracks
across ontario tuesday which elevates wind gusts toward gale
force across north and central lake huron.


lhz362-363-132200-
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 am edt sun sep 13 2026

.rest of today...west winds 10 to 15 knots decreasing to 5 to
10 knots early in the afternoon...then becoming northwest 15 to
20 knots with gusts to around 30 knots late in the afternoon.
waves 2 to 4 feet building to 4 to 6 feet late in the afternoon.
waves occasionally around 8 feet. 
.tonight...northwest winds 20 to 25 knots with gusts to around
30 knots decreasing to 15 to 20 knots early in the morning. waves
6 to 9 feet. waves occasionally around 12 feet. 
.monday...northwest winds 10 to 15 knots becoming north 5 to
10 knots in the late morning and early afternoon...then becoming
light and variable early in the afternoon. waves 3 to 5 feet
subsiding to 1 to 3 feet early in the afternoon. 
.monday night...southeast winds 5 to 10 knots becoming south to
30 knots with gusts to 35 knot gales. a chance of showers after
midnight. waves 2 feet or less building to 8 to 12 feet. waves
occasionally around 15 feet. 
.tuesday...south winds to 30 knots with gusts to 35 knot gales
decreasing to 20 to 25 knots with gusts to 35 knot gales late in
the morning...then becoming southwest 10 to 15 knots late in the
afternoon veering to the northwest late in the evening. showers
likely. waves 10 to 14 feet subsiding to 3 to 5 feet. waves
occasionally around 18 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. waves 2 feet or less. 
.thursday...northeast winds 5 to 10 knots backing to the north by
midnight. a chance of showers. waves 2 feet or less. 


$$

fzus63 kmkx 131400
glflm 
expires:202609132115;;383153

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
900 am cdt sun sep 13 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 through today with
occasional gusts to 25 knots over the lake this afternoon. winds 
ease tonight 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.


lmz669-671-673-675-870-872-874-876-132115-
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-
900 am cdt sun sep 13 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 today...north winds 10 to 20 kt becoming northwest 15 to
25 kt. scattered showers this afternoon. waves 4 to 6 ft
occasionally to 8 ft. 
.tonight...northwest winds 10 to 20 kt becoming 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 15 kt becoming southeast late in the
morning, then increasing to 10 to 20 kt early in the afternoon
increasing to 15 to 25 kt late. waves 1 to 3 ft building to 4 to
7 ft occasionally to 9 ft. 
.monday night...southeast gales to 40 kt becoming south. showers
likely with a chance of thunderstorms overnight. waves 8 to 12 ft
occasionally to 16 ft building to 12 to 16 ft occasionally to
21 ft. 
.tuesday...southwest gales to 35 kt diminishing to 30 kt. showers
likely in the morning, then chance of showers in the afternoon.
waves 12 to 16 ft occasionally to 21 ft subsiding to 8 to 11 ft
occasionally to 14 ft. 
.tuesday night...northwest winds 10 to 15 kt becoming north 10 to
20 kt. chance of showers. waves 4 to 6 ft occasionally to 8 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...east winds 10 to 20 kt becoming northeast. chance of
showers. waves 2 to 4 ft.  

$$

fzus63 kmkx 131400
glflm 
expires:202609132115;;383154

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
900 am cdt sun sep 13 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 through today with
occasional gusts to 25 knots over the lake this afternoon. winds 
ease tonight 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.


lmz080-777-779-878-132115-
lake michigan from michigan city in to st. joseph mi 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 st. joseph to south haven mi 5 nm offshore to
mid lake-
900 am cdt sun sep 13 2026

winthrop harbor il to south haven mi south...

.rest of today...north winds 10 to 15 kt becoming northwest 15 to
25 kt, then diminishing to 10 to 20 kt late. scattered showers
this afternoon. waves 3 to 5 ft building to 4 to 6 ft
occasionally to 8 ft. 
.tonight...northwest winds 10 to 20 kt becoming north 10 to
15 kt, then diminishing to 5 to 10 kt late. waves 3 to 5 ft
subsiding to 2 to 4 ft. 
.monday...east winds 5 to 10 kt becoming southeast 10 to 15 kt,
then increasing to 10 to 20 kt late. waves 2 to 4 ft. 
.monday night...southeast winds to 30 kt becoming south. waves
6 to 9 ft occasionally to 12 ft building to 7 to 10 ft
occasionally to 13 ft. 
.tuesday...south winds to 30 kt becoming southwest 10 to 20 kt in
the afternoon. chance of showers in the morning, then showers
likely in the afternoon. waves 7 to 10 ft occasionally to 13 ft
subsiding to 4 to 6 ft occasionally to 8 ft. 
.tuesday night...northwest winds 5 to 10 kt becoming north 10 to
15 kt. chance of showers. waves 2 to 4 ft. 
.wednesday...northeast winds 10 to 15 kt. chance of showers.
waves 2 to 4 ft. 
.thursday...southeast winds 10 to 15 kt backing to northwest.
showers likely. waves 1 to 3 ft.  

$$

fzus63 kmkx 131400
glflm 
expires:202609132115;;383152

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
900 am cdt sun sep 13 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 through today with
occasional gusts to 25 knots over the lake this afternoon. winds 
ease tonight 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.


lmz261-362-364-366-563-565-567-868-132115-
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-
900 am cdt sun sep 13 2026

sheboygan wi to pentwater mi north...

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

.rest of today...northwest winds 10 to 20 kt increasing to 15 to
25 kt. isolated showers through mid morning. waves 3 to 5 ft. 
.tonight...northwest winds 15 to 25 kt becoming north 10 to
15 kt. waves 3 to 5 ft subsiding to 2 to 4 ft. 
.monday...north winds 5 to 10 kt veering to east late in the
morning, then becoming south 10 to 20 kt early in the afternoon
increasing to 15 to 25 kt late. waves 1 to 2 ft building to 4 to
6 ft occasionally to 8 ft. 
.monday night...south gales to 40 kt. chance of showers in the
evening, then showers overnight. waves 8 to 12 ft occasionally to
16 ft building to 12 to 16 ft occasionally to 21 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 12 to 16 ft occasionally to 21 ft subsiding to
8 to 11 ft occasionally to 14 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 2 to
4 ft. 
.wednesday...northeast winds 10 to 20 kt diminishing to 10 to
15 kt. waves 2 to 4 ft. 
.thursday...east winds 10 to 20 kt becoming northeast. chance of
showers. waves 2 to 4 ft.  

$$

fzus63 kmqt 131401
glfls 
expires:202609132000;;383204

open lake forecast for lake superior
national weather service marquette mi
1000 am edt sun sep 13 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...

30.0 inch ridging builds into lake superior this morning and 
strengthens to 30.2 inches tonight into monday. a low around 29.3 
inches skirts by lake winnipeg into northern ontario monday night, 
bringing 29.7 inch troughing over lake superior. in its stead, 30.2 
inch high pressure ridging develops over the northern plains on 
tuesday, which strengthens to 30.4 inches as it cross the upper 
great lakes by wednesday. the high pressure ridging looks to remain 
through the rest of the workweek. 




lsz265-132000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
1001 am edt sun sep 13 2026

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

.rest of today...northwest winds to 30 knots with a few gale
force gusts to 35 knots possible. a slight chance of showers by
late morning. waves 3 to 5 feet occasionally to 7 feet building
to 4 to 7 feet occasionally to 9 feet, then subsiding to 3 to
6 feet occasionally to 8 feet. 
.tonight...northwest winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. waves subsiding to calm to 2 feet. 
.monday...southwest winds 5 to 15 knots becoming southeast 10 to
20 knots in the afternoon, then increasing to 30 knots with a few
gale force gusts to 35 knots possible late. waves building to
3 to 5 feet occasionally to 7 feet. 
.monday night...south gales to 40 knots. a slight chance of
thunderstorms through midnight. showers. 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 45 knots. waves subsiding to 4 to 7 feet
occasionally to 9 feet, then building to 6 to 9 feet occasionally
to 11 feet. 
.tuesday night...west winds 20 to 30 knots becoming northwest
10 to 20 knots after midnight. waves subsiding to 1 to 3 feet. 
.wednesday...east winds 5 to 15 knots becoming south 10 to
20 knots. a chance of showers. waves subsiding to calm to 2 feet.
.thursday...southwest winds 10 to 20 knots veering north. a
chance of showers. waves calm to 2 feet. 

$$

fzus63 kmqt 131401
glfls 
expires:202609132000;;383205

open lake forecast for lake superior
national weather service marquette mi
1000 am edt sun sep 13 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...

30.0 inch ridging builds into lake superior this morning and 
strengthens to 30.2 inches tonight into monday. a low around 29.3 
inches skirts by lake winnipeg into northern ontario monday night, 
bringing 29.7 inch troughing over lake superior. in its stead, 30.2 
inch high pressure ridging develops over the northern plains on 
tuesday, which strengthens to 30.4 inches as it cross the upper 
great lakes by wednesday. the high pressure ridging looks to remain 
through the rest of the workweek. 




lsz266-132000-
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 am edt sun sep 13 2026

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

.rest of today...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 3 to 5 feet occasionally to
7 feet building to 5 to 8 feet occasionally to 10 feet, then
subsiding to 4 to 7 feet occasionally to 9 feet. 
.tonight...northwest winds 20 to 30 knots diminishing to 5 to
15 knots. waves subsiding to calm to 2 feet. 
.monday...southwest winds 5 to 15 knots becoming south 10 to
20 knots in the afternoon, then becoming southeast 20 to 30 knots
late. waves building to 3 to 5 feet occasionally to 7 feet. 
.monday night...south gales to 45 knots. showers. waves building
to 9 to 12 feet occasionally to 15 feet. 
.tuesday...southwest gales to 40 knots veering west by mid
afternoon. waves subsiding to 7 to 10 feet occasionally to
13 feet, then building to 10 to 14 feet occasionally to 18 feet. 
.tuesday night...west gales to 35 knots becoming northwest 10 to
20 knots after midnight. waves subsiding to 3 to 5 feet
occasionally to 7 feet. 
.wednesday...north winds 5 to 15 knots veering south. waves
subsiding to calm to 2 feet. 
.thursday...southwest winds 5 to 15 knots veering north. a chance
of showers. waves calm to 2 feet. 

$$

fzus63 kmqt 131401
glfls 
expires:202609132000;;383206

open lake forecast for lake superior
national weather service marquette mi
1000 am edt sun sep 13 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...

30.0 inch ridging builds into lake superior this morning and 
strengthens to 30.2 inches tonight into monday. a low around 29.3 
inches skirts by lake winnipeg into northern ontario monday night, 
bringing 29.7 inch troughing over lake superior. in its stead, 30.2 
inch high pressure ridging develops over the northern plains on 
tuesday, which strengthens to 30.4 inches as it cross the upper 
great lakes by wednesday. the high pressure ridging looks to remain 
through the rest of the workweek. 




lsz267-132000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
1001 am edt sun sep 13 2026

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

.rest of today...northwest winds 15 to 25 knots increasing to
20 to 30 knots in the afternoon. a chance of showers. waves 3 to
5 feet occasionally to 7 feet building to 4 to 7 feet
occasionally to 9 feet. 
.tonight...northwest winds 20 to 30 knots diminishing to 10 to
20 knots. waves subsiding to 1 to 3 feet. 
.monday...west winds 5 to 15 knots backing south in the
afternoon, then becoming southeast 10 to 20 knots late. 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...southwest gales to 35 knots veering west by mid
afternoon. a slight chance of showers through early afternoon.
waves subsiding to 5 to 8 feet occasionally to 10 feet, then
building to 7 to 10 feet occasionally to 13 feet. 
.tuesday night...northwest winds 20 to 30 knots diminishing to
15 to 25 knots after midnight. waves subsiding to 3 to 6 feet
occasionally to 8 feet. 
.wednesday...north winds 5 to 15 knots veering south. waves
subsiding to calm to 2 feet. 
.thursday...south winds 5 to 15 knots becoming north 10 to
20 knots. a chance of showers. waves calm to 2 feet. 

$$

fzus63 kmqt 131401
glfls 
expires:202609132000;;383201

open lake forecast for lake superior
national weather service marquette mi
1000 am edt sun sep 13 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...

30.0 inch ridging builds into lake superior this morning and 
strengthens to 30.2 inches tonight into monday. a low around 29.3 
inches skirts by lake winnipeg into northern ontario monday night, 
bringing 29.7 inch troughing over lake superior. in its stead, 30.2 
inch high pressure ridging develops over the northern plains on 
tuesday, which strengthens to 30.4 inches as it cross the upper 
great lakes by wednesday. the high pressure ridging looks to remain 
through the rest of the workweek. 




lsz162-132000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 am edt sun sep 13 2026 /901 am cdt sun sep 13 2026/

...gale watch in effect from late monday night through tuesday
afternoon...

.rest of today...west winds 15 to 25 knots diminishing to 10 to
20 knots late. waves 1 to 3 feet building to 2 to 4 feet, then
subsiding to calm to 2 feet. 
.tonight...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 increasing to 10 to 20 knots
in the afternoon, then becoming southeast 20 to 30 knots late. a
slight chance of showers and thunderstorms 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 slight chance of showers after midnight. waves
building to 5 to 8 feet occasionally to 10 feet. 
.tuesday...west gales to 40 knots. waves building to 6 to 9 feet
occasionally to 11 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet. 
.tuesday night...west winds 10 to 20 knots becoming northwest
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.wednesday...east winds 5 to 15 knots. a chance of showers. waves
calm to 2 feet. 
.thursday...southwest winds 5 to 15 knots veering north. waves
calm to 2 feet. 

$$

fzus63 kmqt 131401
glfls 
expires:202609132000;;383202

open lake forecast for lake superior
national weather service marquette mi
1000 am edt sun sep 13 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...

30.0 inch ridging builds into lake superior this morning and 
strengthens to 30.2 inches tonight into monday. a low around 29.3 
inches skirts by lake winnipeg into northern ontario monday night, 
bringing 29.7 inch troughing over lake superior. in its stead, 30.2 
inch high pressure ridging develops over the northern plains on 
tuesday, which strengthens to 30.4 inches as it cross the upper 
great lakes by wednesday. the high pressure ridging looks to remain 
through the rest of the workweek. 




lsz263-132000-
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 am edt sun sep 13 2026

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

.rest of today...west winds 20 to 30 knots. waves 3 to 6 feet
occasionally to 8 feet, then subsiding to 2 to 4 feet. 
.tonight...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 increasing to 10 to 20 knots
in the afternoon, then becoming southeast 20 to 30 knots late. a
slight chance of showers by mid afternoon. waves calm to 2 feet. 
.monday night...south gales to 35 knots becoming southwest gales
to 40 knots 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. 
.tuesday...west gales to 45 knots. waves building to 10 to
14 feet occasionally to 18 feet, then subsiding to 6 to 9 feet
occasionally to 11 feet. 
.tuesday night...west winds 20 to 30 knots becoming northwest
10 to 20 knots after midnight. waves subsiding to 1 to 3 feet. 
.wednesday...north winds 5 to 15 knots veering south. waves
subsiding to calm to 2 feet. 
.thursday...west winds 5 to 15 knots veering northwest. waves
calm to 2 feet. 

$$

fzus63 kmqt 131401
glfls 
expires:202609132000;;383203

open lake forecast for lake superior
national weather service marquette mi
1000 am edt sun sep 13 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...

30.0 inch ridging builds into lake superior this morning and 
strengthens to 30.2 inches tonight into monday. a low around 29.3 
inches skirts by lake winnipeg into northern ontario monday night, 
bringing 29.7 inch troughing over lake superior. in its stead, 30.2 
inch high pressure ridging develops over the northern plains on 
tuesday, which strengthens to 30.4 inches as it cross the upper 
great lakes by wednesday. the high pressure ridging looks to remain 
through the rest of the workweek. 




lsz264-132000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
1001 am edt sun sep 13 2026

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

.rest of today...northwest winds 15 to 25 knots. a slight chance
of showers by late morning. waves 3 to 5 feet occasionally to
7 feet subsiding to 2 to 4 feet. 
.tonight...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 late. waves building to 2 to 4 feet. 
.monday night...south gales to 40 knots. showers through
midnight, then a chance of showers after midnight. waves building
to 7 to 11 feet occasionally to 14 feet. 
.tuesday...west gales to 45 knots. waves building to 10 to
14 feet occasionally to 18 feet, then subsiding to 7 to 10 feet
occasionally to 13 feet. 
.tuesday night...west winds 20 to 30 knots becoming northwest
10 to 20 knots after midnight. waves subsiding to 1 to 3 feet. 
.wednesday...north winds 5 to 15 knots veering south. waves
subsiding to calm to 2 feet. 
.thursday...southwest winds 5 to 15 knots veering northwest. a
chance of showers. waves calm to 2 feet. 

$$