fzus63 kdtx 161347
glflh 
expires:202608162200;;291507

open lake forecast for lake huron
national weather service detroit/pontiac mi
947 am edt sun aug 16 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 of 30.20 inches moves over the northeast
through today as low pressure of 29.6 inches moves east across
ontario. as the low tracks east, it will push a cold front across
the central great lakes region late this evening. this cold front
brings in a 6-8 hour bout of 20-25 knot northwest winds tonight
into early monday morning and chances for thunderstorms this
afternoon and evening.


lhz361-162200-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
947 am edt sun aug 16 2026

.rest of today...south winds 5 to 10 knots veering to the west
late in the afternoon. showers likely and a chance of
thunderstorms late in the morning...then a chance of showers in
the afternoon. waves 1 to 3 feet. 
.tonight...northwest winds 10 to 15 knots increasing to 15 to
20 knots by midnight...then decreasing to 10 to 15 knots early in
the morning. waves 3 to 5 feet. 
.monday...northwest winds 5 to 10 knots backing to the west early
in the afternoon. waves 2 to 4 feet subsiding to 2 feet or less
in the late morning and afternoon. 
.monday night...west winds 5 to 10 knots early in the evening
becoming light and variable...then becoming south 5 to 10 knots
after midnight. waves 2 feet or less. 
.tuesday...southwest winds 10 to 15 knots veering to the
northwest late in the afternoon. a chance of thunderstorms late
in the morning. a chance of showers late in the morning. waves
1 to 3 feet. 
.wednesday...northwest winds 10 to 15 knots becoming west 5 to
10 knots in the late morning and early afternoon...then
increasing to 10 to 15 knots early in the evening becoming
northwest 5 to 10 knots by midnight. waves 1 to 3 feet building
to 2 to 4 feet . 
.thursday...northwest winds 5 to 10 knots early in the morning
becoming light and variable...then becoming northwest 5 to
10 knots by midnight. waves 2 feet or less. 


$$

fzus63 kdtx 161347
glflh 
expires:202608162200;;291508

open lake forecast for lake huron
national weather service detroit/pontiac mi
947 am edt sun aug 16 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 of 30.20 inches moves over the northeast
through today as low pressure of 29.6 inches moves east across
ontario. as the low tracks east, it will push a cold front across
the central great lakes region late this evening. this cold front
brings in a 6-8 hour bout of 20-25 knot northwest winds tonight
into early monday morning and chances for thunderstorms this
afternoon and evening.


lhz362-363-162200-
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-
947 am edt sun aug 16 2026

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


$$

fzus63 kdtx 161347
glflh 
expires:202608162200;;291509

open lake forecast for lake huron
national weather service detroit/pontiac mi
947 am edt sun aug 16 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 of 30.20 inches moves over the northeast
through today as low pressure of 29.6 inches moves east across
ontario. as the low tracks east, it will push a cold front across
the central great lakes region late this evening. this cold front
brings in a 6-8 hour bout of 20-25 knot northwest winds tonight
into early monday morning and chances for thunderstorms this
afternoon and evening.


lhz462>464-162200-
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-
947 am edt sun aug 16 2026

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


$$

fzus63 kmkx 161344
glflm 
expires:202608162115;;291324

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
844 am cdt sun aug 16 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...

29.8 inch low pressure is centered to the northeast of lake
superior this morning, resulting in generally west winds across
the open waters of lake michigan. currently extending from the
upper peninsula of michigan to southwest wisconsin, a cold front
will cross the waters this afternoon and evening, bringing a
breezy northwest wind shift. scattered showers and thunderstorms
are possible along the approaching/passing boundary, particularly
over the southern half of the lake. severe weather is not 
expected.

a new area of 30.1 inch high pressure will build in from the 
northern great plains late tonight into monday, bringing light and
variable winds to the waters through the majority of monday and 
monday night. a slow-moving cold front will approach from the 
northern great plains tuesday into wednesday, bringing increasing 
southwest winds and chances for thunderstorms. tuesday evening and
night appears most favored for storm potential, with storm 
chances expected to move well south of the waters on wednesday. 
30.0 inch high pressure will move through the western great lakes
wednesday through thursday, with light and variable winds 
prevailing across the waters. the next thunderstorm chances arrive
friday afternoon and evening, when the next cold front is 
expected to move across lake michigan.


lmz080-669-671-673-675-777-779-870-872-874-876-878-162115-
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-
844 am cdt sun aug 16 2026

sheboygan wi to pentwater mi south...

.rest of today...west winds 10 to 15 kt increasing to 10 to
20 kt. slight chance of showers and thunderstorms. waves 1 to
3 ft. 
.tonight...northwest winds 10 to 20 kt becoming north. waves 2 to
4 ft. 
.monday...north winds 10 to 15 kt backing to west 10 to 20 kt.
waves 2 to 4 ft subsiding to 1 to 2 ft. 
.monday night...southwest winds 10 to 20 kt. waves 1 to 3 ft
building to 2 to 4 ft. 
.tuesday...southwest winds 10 to 20 kt. waves 2 to 4 ft. 
.tuesday night...southwest winds 10 to 20 kt becoming northwest.
chance of showers and thunderstorms. waves 2 to 4 ft. 
.wednesday...north winds 10 to 20 kt increasing to 30 kt. chance
of showers. waves 2 to 4 ft. 
.thursday...southwest winds 5 to 10 kt becoming south 10 to
15 kt. waves 1 to 2 ft.  

$$

fzus63 kmkx 161344
glflm 
expires:202608162115;;291323

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
844 am cdt sun aug 16 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...

29.8 inch low pressure is centered to the northeast of lake
superior this morning, resulting in generally west winds across
the open waters of lake michigan. currently extending from the
upper peninsula of michigan to southwest wisconsin, a cold front
will cross the waters this afternoon and evening, bringing a
breezy northwest wind shift. scattered showers and thunderstorms
are possible along the approaching/passing boundary, particularly
over the southern half of the lake. severe weather is not 
expected.

a new area of 30.1 inch high pressure will build in from the 
northern great plains late tonight into monday, bringing light and
variable winds to the waters through the majority of monday and 
monday night. a slow-moving cold front will approach from the 
northern great plains tuesday into wednesday, bringing increasing 
southwest winds and chances for thunderstorms. tuesday evening and
night appears most favored for storm potential, with storm 
chances expected to move well south of the waters on wednesday. 
30.0 inch high pressure will move through the western great lakes
wednesday through thursday, with light and variable winds 
prevailing across the waters. the next thunderstorm chances arrive
friday afternoon and evening, when the next cold front is 
expected to move across lake michigan.


lmz261-362-364-366-563-565-567-868-162115-
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-
844 am cdt sun aug 16 2026

sheboygan wi to pentwater mi north...

.rest of today...southwest winds 10 to 20 kt veering to northwest
15 to 25 kt. chance of showers and slight chance of thunderstorms
through mid morning, then slight chance of showers this
afternoon. waves 1 to 3 ft building to 2 to 4 ft. 
.tonight...north winds 15 to 25 kt becoming northwest 10 to
15 kt. waves 2 to 4 ft subsiding to 1 to 3 ft. 
.monday...northwest winds 10 to 15 kt backing to southwest 10 to
20 kt. waves 1 to 3 ft. 
.monday night...south winds 10 to 20 kt becoming southwest. waves
2 to 4 ft. 
.tuesday...southwest winds 15 to 25 kt. waves 2 to 4 ft. 
.tuesday night...northwest winds 10 to 20 kt becoming north.
waves 2 to 4 ft. 
.wednesday...north winds 10 to 20 kt increasing to 15 to 25 kt.
waves 1 to 3 ft. 
.thursday...west winds 5 to 10 kt becoming southwest 10 to 20 kt.
waves 1 ft or less.  

$$

fzus63 kmqt 161401
glfls 
expires:202608162000;;291772

open lake forecast for lake superior
national weather service marquette mi
1001 am edt sun aug 16 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...

this morning, a 29.9 inch trough is over the lake associated with a 
29.8 inch low over far northern ontario. by tonight, the low will 
deepen to 29.7 inches as 30.0 inch high pressure expands over the 
northern plains. by monday afternoon, the high will build to 30.1 
inches over iowa as the low deepens to 29.6 inches over northeast 
quebec. meanwhile, a 29.5 inch low develops over western hudson bay. 
by tuesday morning, the low will expand across much of hudson bay 
while the hgih weakens to 30.0 inches and sags south of the great 
lakes. as the low reaches northwest quebec at 29.6 inches tuesday 
night, another 30.0 inch high settles over north dakota. this high 
moves over lake superior wednesday evening, expanding to cover much 
of the great lakes by thursday evening. friday into the weekend, a 
low pressure of around 29.87 inches will transit across northern 
ontario.




lsz266-162000-
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 aug 16 2026

.rest of today...northwest winds 15 to 25 knots. a slight chance
of showers by late morning. waves 1 to 3 feet building to 3 to
5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. 
.tonight...northwest winds 10 to 20 knots. waves subsiding to
calm to 2 feet. 
.monday...northwest winds 5 to 15 knots backing southwest late.
waves calm to 2 feet. 
.monday night...south winds 5 to 15 knots becoming southwest
15 to 25 knots after midnight. a chance of showers. waves calm to
2 feet. 
.tuesday...west winds 15 to 25 knots. a slight chance of showers
through early afternoon. waves building to 1 to 3 feet, then
subsiding to calm to 2 feet. 
.tuesday night...west winds 10 to 20 knots veering northwest
after midnight. waves calm to 2 feet. 
.wednesday...northwest winds 5 to 15 knots backing west. waves
calm to 2 feet. 
.thursday...west winds 5 to 15 knots becoming south 15 to
25 knots. waves building to 1 to 3 feet. 

$$

fzus63 kmqt 161401
glfls 
expires:202608162000;;291773

open lake forecast for lake superior
national weather service marquette mi
1001 am edt sun aug 16 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...

this morning, a 29.9 inch trough is over the lake associated with a 
29.8 inch low over far northern ontario. by tonight, the low will 
deepen to 29.7 inches as 30.0 inch high pressure expands over the 
northern plains. by monday afternoon, the high will build to 30.1 
inches over iowa as the low deepens to 29.6 inches over northeast 
quebec. meanwhile, a 29.5 inch low develops over western hudson bay. 
by tuesday morning, the low will expand across much of hudson bay 
while the hgih weakens to 30.0 inches and sags south of the great 
lakes. as the low reaches northwest quebec at 29.6 inches tuesday 
night, another 30.0 inch high settles over north dakota. this high 
moves over lake superior wednesday evening, expanding to cover much 
of the great lakes by thursday evening. friday into the weekend, a 
low pressure of around 29.87 inches will transit across northern 
ontario.




lsz267-162000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
1001 am edt sun aug 16 2026

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

$$

fzus63 kmqt 161401
glfls 
expires:202608162000;;291768

open lake forecast for lake superior
national weather service marquette mi
1001 am edt sun aug 16 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...

this morning, a 29.9 inch trough is over the lake associated with a 
29.8 inch low over far northern ontario. by tonight, the low will 
deepen to 29.7 inches as 30.0 inch high pressure expands over the 
northern plains. by monday afternoon, the high will build to 30.1 
inches over iowa as the low deepens to 29.6 inches over northeast 
quebec. meanwhile, a 29.5 inch low develops over western hudson bay. 
by tuesday morning, the low will expand across much of hudson bay 
while the hgih weakens to 30.0 inches and sags south of the great 
lakes. as the low reaches northwest quebec at 29.6 inches tuesday 
night, another 30.0 inch high settles over north dakota. this high 
moves over lake superior wednesday evening, expanding to cover much 
of the great lakes by thursday evening. friday into the weekend, a 
low pressure of around 29.87 inches will transit across northern 
ontario.




lsz162-162000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 am edt sun aug 16 2026 /901 am cdt sun aug 16 2026/

.rest of today...west winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon. waves 1 to 3 feet subsiding to calm to
2 feet. 
.tonight...west winds 10 to 20 knots becoming northwest 5 to
15 knots after midnight, then backing west late. waves calm to
2 feet. 
.monday...west winds 5 to 15 knots becoming southwest 10 to
20 knots in the afternoon. a slight chance of showers by mid
afternoon. waves building to 1 to 3 feet. 
.monday night...southwest winds 10 to 20 knots veering west after
midnight. a slight chance of thunderstorms through midnight. a
chance of showers. waves subsiding to calm to 2 feet. 
.tuesday...west winds 10 to 20 knots diminishing to 5 to 15 knots
by mid afternoon. waves calm to 2 feet. 
.tuesday night...west winds 5 to 15 knots veering northwest after
midnight. waves calm to 2 feet. 
.wednesday...southwest winds 5 to 15 knots veering north. waves
calm to 2 feet. 
.thursday...south winds 5 to 15 knots becoming southwest 10 to
20 knots. a chance of showers. waves calm to 2 feet. 

$$

fzus63 kmqt 161401
glfls 
expires:202608162000;;291769

open lake forecast for lake superior
national weather service marquette mi
1001 am edt sun aug 16 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...

this morning, a 29.9 inch trough is over the lake associated with a 
29.8 inch low over far northern ontario. by tonight, the low will 
deepen to 29.7 inches as 30.0 inch high pressure expands over the 
northern plains. by monday afternoon, the high will build to 30.1 
inches over iowa as the low deepens to 29.6 inches over northeast 
quebec. meanwhile, a 29.5 inch low develops over western hudson bay. 
by tuesday morning, the low will expand across much of hudson bay 
while the hgih weakens to 30.0 inches and sags south of the great 
lakes. as the low reaches northwest quebec at 29.6 inches tuesday 
night, another 30.0 inch high settles over north dakota. this high 
moves over lake superior wednesday evening, expanding to cover much 
of the great lakes by thursday evening. friday into the weekend, a 
low pressure of around 29.87 inches will transit across northern 
ontario.




lsz263-162000-
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 aug 16 2026

.rest of today...west winds 10 to 20 knots. waves 1 to 3 feet
building to 2 to 4 feet, then subsiding to 1 to 3 feet. 
.tonight...west winds 10 to 20 knots becoming northwest 5 to
15 knots after midnight, then backing west late. waves subsiding
to calm to 2 feet. 
.monday...west winds 5 to 15 knots becoming southwest 15 to
25 knots in the afternoon. a chance of showers by mid afternoon.
waves building to 2 to 4 feet. 
.monday night...southwest winds 15 to 25 knots becoming west
10 to 20 knots after midnight. a slight chance of thunderstorms
through midnight. a chance of showers. waves subsiding to calm to
2 feet. 
.tuesday...west winds 10 to 20 knots. waves calm to 2 feet. 
.tuesday night...west winds 10 to 20 knots becoming northwest
5 to 15 knots after midnight. waves calm to 2 feet. 
.wednesday...southwest winds 5 to 15 knots. waves calm to 2 feet.
.thursday...southwest winds 10 to 20 knots becoming south 15 to
25 knots. a chance of showers. waves building to 1 to 3 feet. 

$$

fzus63 kmqt 161401
glfls 
expires:202608162000;;291770

open lake forecast for lake superior
national weather service marquette mi
1001 am edt sun aug 16 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...

this morning, a 29.9 inch trough is over the lake associated with a 
29.8 inch low over far northern ontario. by tonight, the low will 
deepen to 29.7 inches as 30.0 inch high pressure expands over the 
northern plains. by monday afternoon, the high will build to 30.1 
inches over iowa as the low deepens to 29.6 inches over northeast 
quebec. meanwhile, a 29.5 inch low develops over western hudson bay. 
by tuesday morning, the low will expand across much of hudson bay 
while the hgih weakens to 30.0 inches and sags south of the great 
lakes. as the low reaches northwest quebec at 29.6 inches tuesday 
night, another 30.0 inch high settles over north dakota. this high 
moves over lake superior wednesday evening, expanding to cover much 
of the great lakes by thursday evening. friday into the weekend, a 
low pressure of around 29.87 inches will transit across northern 
ontario.




lsz264-162000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
1001 am edt sun aug 16 2026

.rest of today...northwest winds 10 to 20 knots backing west
late. waves 1 to 3 feet subsiding to calm to 2 feet. 
.tonight...west winds 5 to 15 knots veering northwest late. waves
calm to 2 feet. 
.monday...west winds 5 to 15 knots becoming southwest 10 to
20 knots in the afternoon. a chance of showers by mid afternoon.
waves building to 1 to 3 feet. 
.monday night...southwest winds 10 to 20 knots veering west after
midnight. a slight chance of thunderstorms through midnight. a
chance of showers. waves building to 2 to 4 feet, then subsiding
to calm to 2 feet. 
.tuesday...west winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. waves calm to 2 feet. 
.tuesday night...west winds 10 to 20 knots becoming northwest
5 to 15 knots after midnight. waves calm to 2 feet. 
.wednesday...northwest winds 5 to 15 knots backing west. waves
calm to 2 feet. 
.thursday...southwest winds 5 to 15 knots becoming south 10 to
20 knots. a chance of showers. waves building to 1 to 3 feet. 

$$

fzus63 kmqt 161401
glfls 
expires:202608162000;;291771

open lake forecast for lake superior
national weather service marquette mi
1001 am edt sun aug 16 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...

this morning, a 29.9 inch trough is over the lake associated with a 
29.8 inch low over far northern ontario. by tonight, the low will 
deepen to 29.7 inches as 30.0 inch high pressure expands over the 
northern plains. by monday afternoon, the high will build to 30.1 
inches over iowa as the low deepens to 29.6 inches over northeast 
quebec. meanwhile, a 29.5 inch low develops over western hudson bay. 
by tuesday morning, the low will expand across much of hudson bay 
while the hgih weakens to 30.0 inches and sags south of the great 
lakes. as the low reaches northwest quebec at 29.6 inches tuesday 
night, another 30.0 inch high settles over north dakota. this high 
moves over lake superior wednesday evening, expanding to cover much 
of the great lakes by thursday evening. friday into the weekend, a 
low pressure of around 29.87 inches will transit across northern 
ontario.




lsz265-162000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
1001 am edt sun aug 16 2026

.rest of today...northwest winds 20 to 30 knots. waves 1 to
3 feet building to 2 to 4 feet, then subsiding to 1 to 3 feet. 
.tonight...northwest winds 15 to 25 knots becoming west 10 to
20 knots after midnight. waves subsiding to calm to 2 feet. 
.monday...west winds 10 to 20 knots diminishing to 5 to 15 knots
late. waves calm to 2 feet. 
.monday night...south winds 10 to 20 knots becoming west 15 to
25 knots after midnight. a chance of showers. waves calm to
2 feet. 
.tuesday...west winds 15 to 25 knots veering northwest by mid
afternoon. a slight chance of showers through early afternoon.
waves building to 1 to 3 feet, then subsiding to calm to 2 feet. 
.tuesday night...west winds 10 to 20 knots. waves calm to 2 feet.
.wednesday...northwest winds 10 to 20 knots becoming west 5 to
15 knots. waves calm to 2 feet. 
.thursday...southeast winds 5 to 15 knots becoming south 10 to
20 knots. waves building to 1 to 3 feet. 

$$