fzus63 kdtx 190157
glflh 
expires:202605191000;;798509

open lake forecast for lake huron
national weather service detroit/pontiac mi
957 pm edt mon may 18 2026

for waters beyond five nautical miles off shore on lake huron

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

.synopsis...a cold front sweeps across the region tomorrow 
evening, veering winds from southwest to northwest. strong to 
severe thunderstorms will be possible ahead of this cold front. 
high pressure, 30.50 inches, then builds in mid-week.


lhz361-191000-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
957 pm edt mon may 18 2026

...dense fog advisory in effect until 4 pm edt tuesday...

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


$$

fzus63 kdtx 190157
glflh 
expires:202605191000;;798510

open lake forecast for lake huron
national weather service detroit/pontiac mi
957 pm edt mon may 18 2026

for waters beyond five nautical miles off shore on lake huron

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

.synopsis...a cold front sweeps across the region tomorrow 
evening, veering winds from southwest to northwest. strong to 
severe thunderstorms will be possible ahead of this cold front. 
high pressure, 30.50 inches, then builds in mid-week.


lhz362-363-191000-
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-
957 pm edt mon may 18 2026

...dense fog advisory in effect until 4 pm edt tuesday...

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


$$

fzus63 kdtx 190157
glflh 
expires:202605191000;;798511

open lake forecast for lake huron
national weather service detroit/pontiac mi
957 pm edt mon may 18 2026

for waters beyond five nautical miles off shore on lake huron

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

.synopsis...a cold front sweeps across the region tomorrow 
evening, veering winds from southwest to northwest. strong to 
severe thunderstorms will be possible ahead of this cold front. 
high pressure, 30.50 inches, then builds in mid-week.


lhz462>464-191000-
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-
957 pm edt mon may 18 2026

...dense fog advisory in effect until 4 pm edt tuesday...

.rest of tonight...south winds 10 to 15 knots. waves 2 to 4 feet.
.tuesday...south winds 15 to 20 knots. a chance of showers and
thunderstorms in the afternoon. waves 3 to 5 feet. 
.tuesday night...southwest winds 15 to 20 knots becoming west
10 to 15 knots in the late evening and overnight. a chance of
showers and thunderstorms in the evening...then a chance of
showers after midnight. waves 3 to 5 feet. 
.wednesday...north winds 10 to 15 knots. waves 4 to 6 feet. 
.wednesday night...north winds 10 to 15 knots. waves 4 to 6 feet.
waves occasionally around 8 feet. 
.thursday...northeast winds 5 to 10 knots becoming north 10 to
15 knots late in the afternoon...then becoming northeast 5 to
10 knots late in the evening. waves 2 to 4 feet subsiding to 1 to
3 feet. 
.friday...east winds 5 to 10 knots increasing to 15 to 20 knots.
a chance of showers by midnight. waves 1 to 3 feet building to
3 to 5 feet . 
.saturday...east winds 15 to 20 knots decreasing to 10 to
15 knots. a chance of showers. waves 3 to 5 feet subsiding to
2 to 4 feet by midnight. 


$$

fzus63 kmkx 190147
glflm 
expires:202605190915;;798176

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
847 pm cdt mon may 18 2026

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

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

.synopsis...

a dense fog advisory is in effect tonight through tuesday morning
for the north half of the lake as relatively mild and humid air
flows over the cold lake waters. otherwise modest to breezy
southerly winds will develop tonight and last into early tuesday
afternoon, then followed by the passage of a cold front. winds
will shift to northwesterly with the cold frontal passage and
remain a bit breezy. scattered thunderstorms can be expected over
the central and southern portion of the lake late tonight into
tuesday. high pressure around 30.4 inches will then move into
the northern great lakes for wednesday afternoon into thursday. 
light to modest north to northeast winds can be expected. 



lmz261-362-364-366-563-565-567-868-190915-
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-
847 pm cdt mon may 18 2026

sheboygan wi to pentwater mi north...

...dense fog advisory in effect until noon cdt tuesday...

.rest of tonight...south winds 10 to 20 kt increasing to 30 kt.
widespread dense fog. slight chance of rain showers through early
evening, then chance of rain showers and thunderstorms overnight.
waves 4 to 7 ft occasionally to 9 ft. 
.tuesday...south winds to 30 kt becoming west. widespread dense
fog in the morning, then patchy fog in the afternoon. slight
chance of showers and thunderstorms 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. 
.tuesday night...northwest winds 15 to 25 kt. waves 3 to 5 ft. 
.wednesday...north winds 15 to 25 kt. waves 2 to 4 ft. 
.wednesday night...northeast winds 10 to 20 kt diminishing to
10 to 15 kt. waves 1 to 3 ft subsiding to 1 to 2 ft. 
.thursday...east winds 5 to 10 kt becoming northeast 10 to 20 kt
in the afternoon. waves 1 to 2 ft. 
.thursday night...northeast winds 10 to 15 kt becoming east.
waves 1 to 3 ft. 
.friday...east winds 10 to 20 kt becoming northeast 15 to 25 kt.
waves 2 to 4 ft. 
.saturday...northeast winds 15 to 25 kt. chance of rain showers.
waves 3 to 5 ft.  

$$

fzus63 kmkx 190147
glflm 
expires:202605190915;;798177

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
847 pm cdt mon may 18 2026

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

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

.synopsis...

a dense fog advisory is in effect tonight through tuesday morning
for the north half of the lake as relatively mild and humid air
flows over the cold lake waters. otherwise modest to breezy
southerly winds will develop tonight and last into early tuesday
afternoon, then followed by the passage of a cold front. winds
will shift to northwesterly with the cold frontal passage and
remain a bit breezy. scattered thunderstorms can be expected over
the central and southern portion of the lake late tonight into
tuesday. high pressure around 30.4 inches will then move into
the northern great lakes for wednesday afternoon into thursday. 
light to modest north to northeast winds can be expected. 



lmz080-669-671-673-675-777-779-870-872-874-876-878-190915-
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-
847 pm cdt mon may 18 2026

sheboygan wi to pentwater mi south...

.rest of tonight...south winds 15 to 25 kt increasing to 30 kt.
slight chance of showers through early evening, then chance of
showers and thunderstorms overnight. patchy fog overnight. waves
4 to 7 ft occasionally to 9 ft. 
.tuesday...south winds to 30 kt becoming west 15 to 25 kt. patchy
fog in the morning. slight chance of showers and thunderstorms in
the morning, then chance of showers and slight chance of
thunderstorms in the afternoon. waves 4 to 7 ft occasionally to
9 ft subsiding to 4 to 6 ft occasionally to 8 ft. 
.tuesday night...northwest winds 10 to 20 kt becoming north.
waves 3 to 5 ft. 
.wednesday...north winds 10 to 20 kt increasing to 15 to 25 kt.
waves 4 to 6 ft occasionally to 8 ft. 
.wednesday night...northeast winds 15 to 25 kt diminishing to
10 to 20 kt. waves 4 to 6 ft occasionally to 8 ft subsiding to
3 to 5 ft. 
.thursday...east winds 10 to 20 kt becoming northeast. waves 2 to
4 ft. 
.thursday night...northeast winds 10 to 20 kt becoming east.
waves 2 to 4 ft. 
.friday...east winds 10 to 20 kt becoming northeast. chance of
showers. waves 2 to 4 ft. 
.saturday...northeast winds 10 to 20 kt becoming north 10 to
15 kt. waves 3 to 5 ft subsiding to 2 to 4 ft.  

$$

fzus63 kmqt 190201
glfls 
expires:202605190800;;798752

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt mon may 18 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 low lifting from the central plains this evening reaches 
lake superior by tuesday morning. afterwards, a 30.2 inch high over 
the northern plains builds to 30.4 inches tuesday night into 
wednesday as it tracks eastward into the upper great lakes. the high 
pressure shifts east on thursday while leaving lingering ridging of 
at least 30.2 inches over lake superior into friday. a 29.9 inch low 
lifts into the lower great lakes from the southern plains on 
saturday, but 30.1 inch ridging persists over lake superior.



lsz162-190800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 pm edt mon may 18 2026 /901 pm cdt mon may 18 2026/

.rest of tonight...northeast winds 15 to 25 knots backing north
late. patchy fog. a chance of rain showers by midnight. a chance
of thunderstorms. rain showers likely after midnight. waves 2 to
4 feet building to 3 to 6 feet occasionally to 8 feet. 
.tuesday...west winds 10 to 20 knots. a slight chance of rain
showers through early afternoon. waves subsiding to 1 to 3 feet. 
.tuesday night...northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.wednesday...northwest winds 5 to 15 knots backing south by mid
afternoon. waves calm to 2 feet. 
.wednesday night...southeast winds 5 to 15 knots becoming south
less than 10 knots after midnight. waves calm to 2 feet. 
.thursday...south winds 5 to 15 knots backing east by mid
afternoon. waves calm to 2 feet. 
.thursday night...east winds 5 to 15 knots. waves calm to 2 feet.
.friday...east winds 10 to 20 knots backing northeast. a chance
of rain showers. waves building to 2 to 4 feet, then subsiding to
calm to 2 feet. 
.saturday...northeast winds 10 to 20 knots diminishing to 5 to
15 knots. a chance of rain showers. waves building to 1 to
3 feet, then subsiding to calm to 2 feet. 

$$

fzus63 kmqt 190201
glfls 
expires:202605190800;;798753

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt mon may 18 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 low lifting from the central plains this evening reaches 
lake superior by tuesday morning. afterwards, a 30.2 inch high over 
the northern plains builds to 30.4 inches tuesday night into 
wednesday as it tracks eastward into the upper great lakes. the high 
pressure shifts east on thursday while leaving lingering ridging of 
at least 30.2 inches over lake superior into friday. a 29.9 inch low 
lifts into the lower great lakes from the southern plains on 
saturday, but 30.1 inch ridging persists over lake superior.



lsz263-190800-
lake superior from saxon harbor wi to upper entrance to portage
canal mi 5nm off shore to the us/canadian border including isle
royale national park-
1001 pm edt mon may 18 2026

.rest of tonight...northeast winds 15 to 25 knots. patchy fog. a
chance of rain showers by midnight. a chance of thunderstorms.
rain showers after midnight. waves 2 to 4 feet building to 3 to
6 feet occasionally to 8 feet. 
.tuesday...north winds 10 to 20 knots backing west in the
afternoon. patchy fog through early afternoon. a chance of rain
showers through early afternoon. waves subsiding to 2 to 4 feet. 
.tuesday night...northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.wednesday...northwest winds 5 to 15 knots becoming south 10 to
20 knots by mid afternoon. waves building to 1 to 3 feet. 
.wednesday night...south winds 5 to 15 knots. waves subsiding to
calm to 2 feet. 
.thursday...south winds 5 to 15 knots backing east by mid
afternoon. waves calm to 2 feet. 
.thursday night...southeast winds 5 to 15 knots veering south
after midnight. waves calm to 2 feet. 
.friday...east winds 10 to 20 knots. waves building to 2 to
4 feet, then subsiding to calm to 2 feet. 
.saturday...east winds 5 to 15 knots. a chance of rain showers.
waves building to 1 to 3 feet, then subsiding to calm to 2 feet. 

$$

fzus63 kmqt 190201
glfls 
expires:202605190800;;798754

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt mon may 18 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 low lifting from the central plains this evening reaches 
lake superior by tuesday morning. afterwards, a 30.2 inch high over 
the northern plains builds to 30.4 inches tuesday night into 
wednesday as it tracks eastward into the upper great lakes. the high 
pressure shifts east on thursday while leaving lingering ridging of 
at least 30.2 inches over lake superior into friday. a 29.9 inch low 
lifts into the lower great lakes from the southern plains on 
saturday, but 30.1 inch ridging persists over lake superior.



lsz264-190800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
1001 pm edt mon may 18 2026

...dense fog advisory in effect until 11 am edt tuesday...

.rest of tonight...northeast winds 15 to 25 knots. patchy dense
fog. a chance of rain showers by midnight. a chance of
thunderstorms. rain showers after midnight. waves 3 to 6 feet
occasionally to 8 feet. 
.tuesday...north winds 15 to 25 knots backing northwest in the
afternoon. patchy dense fog through early afternoon. a chance of
rain showers through early afternoon. waves subsiding to 2 to
4 feet. 
.tuesday night...northwest winds 10 to 20 knots. waves building
to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to
4 feet. 
.wednesday...northwest winds 5 to 15 knots backing southwest by
mid afternoon. waves subsiding to calm to 2 feet. 
.wednesday night...south winds 5 to 15 knots. waves calm to
2 feet. 
.thursday...south winds 5 to 15 knots backing southeast by mid
afternoon. waves calm to 2 feet. 
.thursday night...southeast winds 5 to 15 knots veering south
after midnight. waves calm to 2 feet. 
.friday...east winds 5 to 15 knots. waves building to 1 to
3 feet, then subsiding to calm to 2 feet. 
.saturday...east winds 5 to 15 knots veering southeast. waves
building to 1 to 3 feet, then subsiding to calm to 2 feet. 

$$

fzus63 kmqt 190201
glfls 
expires:202605190800;;798755

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt mon may 18 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 low lifting from the central plains this evening reaches 
lake superior by tuesday morning. afterwards, a 30.2 inch high over 
the northern plains builds to 30.4 inches tuesday night into 
wednesday as it tracks eastward into the upper great lakes. the high 
pressure shifts east on thursday while leaving lingering ridging of 
at least 30.2 inches over lake superior into friday. a 29.9 inch low 
lifts into the lower great lakes from the southern plains on 
saturday, but 30.1 inch ridging persists over lake superior.



lsz265-190800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
1001 pm edt mon may 18 2026

...dense fog advisory in effect until 11 am edt tuesday...

.rest of tonight...northeast winds 10 to 20 knots becoming east
5 to 15 knots after midnight, then increasing to 10 to 20 knots
late. areas of dense fog. a chance of rain showers by midnight. a
chance of thunderstorms. rain showers likely after midnight.
waves calm to 2 feet building to 1 to 3 feet. 
.tuesday...west winds 15 to 25 knots increasing to 20 to 30 knots
in the afternoon, then veering northwest late. patchy dense fog
through early afternoon. a chance of rain showers through early
afternoon. waves building to 3 to 5 feet occasionally to 7 feet. 
.tuesday night...northwest winds 15 to 25 knots. waves subsiding
to 2 to 4 feet. 
.wednesday...northwest winds 10 to 20 knots becoming north 5 to
15 knots by mid afternoon. waves subsiding to calm to 2 feet. 
.wednesday night...south winds 5 to 15 knots. waves calm to
2 feet. 
.thursday...south winds 10 to 20 knots becoming southeast 15 to
25 knots by mid afternoon. waves building to 1 to 3 feet. 
.thursday night...southeast winds 10 to 20 knots becoming south
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.friday...east winds 10 to 20 knots. waves building to 2 to
4 feet, then subsiding to 1 to 3 feet. 
.saturday...east winds 10 to 20 knots veering southeast. waves
subsiding to calm to 2 feet. 

$$

fzus63 kmqt 190201
glfls 
expires:202605190800;;798756

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt mon may 18 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 low lifting from the central plains this evening reaches 
lake superior by tuesday morning. afterwards, a 30.2 inch high over 
the northern plains builds to 30.4 inches tuesday night into 
wednesday as it tracks eastward into the upper great lakes. the high 
pressure shifts east on thursday while leaving lingering ridging of 
at least 30.2 inches over lake superior into friday. a 29.9 inch low 
lifts into the lower great lakes from the southern plains on 
saturday, but 30.1 inch ridging persists over lake superior.



lsz266-190800-
lake superior east of a line from manitou island to marquette mi
and west of a line from grand marais mi to the us/canadian border
beyond 5nm from shore-
1001 pm edt mon may 18 2026

...dense fog advisory in effect until 11 am edt tuesday...

.rest of tonight...northeast winds 10 to 20 knots veering
southeast late. areas of dense fog. a chance of rain showers and
a slight chance of thunderstorms. waves 3 to 5 feet occasionally
to 7 feet subsiding to 2 to 4 feet. 
.tuesday...south winds 15 to 25 knots becoming northwest 20 to
30 knots in the afternoon. areas of dense fog through early
afternoon. a chance of rain showers and a slight chance of
thunderstorms through early afternoon. waves building to 5 to
8 feet occasionally to 10 feet. 
.tuesday night...northwest winds 20 to 30 knots. waves subsiding
to 4 to 7 feet occasionally to 9 feet. 
.wednesday...northwest winds 10 to 20 knots diminishing to 5 to
15 knots by mid afternoon. waves subsiding to 1 to 3 feet. 
.wednesday night...west winds 5 to 15 knots backing south after
midnight. waves subsiding to calm to 2 feet. 
.thursday...south winds 5 to 15 knots becoming southeast 10 to
20 knots by mid afternoon. waves building to 1 to 3 feet. 
.thursday night...southeast winds 10 to 20 knots veering south
after midnight. waves subsiding to calm to 2 feet. 
.friday...east winds 10 to 20 knots. waves building to 1 to
3 feet. 
.saturday...east winds 10 to 20 knots veering southeast. waves
subsiding to calm to 2 feet. 

$$

fzus63 kmqt 190201
glfls 
expires:202605190800;;798757

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt mon may 18 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 low lifting from the central plains this evening reaches 
lake superior by tuesday morning. afterwards, a 30.2 inch high over 
the northern plains builds to 30.4 inches tuesday night into 
wednesday as it tracks eastward into the upper great lakes. the high 
pressure shifts east on thursday while leaving lingering ridging of 
at least 30.2 inches over lake superior into friday. a 29.9 inch low 
lifts into the lower great lakes from the southern plains on 
saturday, but 30.1 inch ridging persists over lake superior.



lsz267-190800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
1001 pm edt mon may 18 2026

...dense fog advisory in effect until 2 pm edt tuesday...

.rest of tonight...east winds 10 to 20 knots becoming southeast
15 to 25 knots late. areas of dense fog. a slight chance of rain
showers by midnight. a chance of thunderstorms. rain showers
likely after midnight. waves calm to 2 feet building to 1 to
3 feet. 
.tuesday...south winds 15 to 25 knots becoming west 20 to
30 knots in the afternoon, then increasing to 30 knots with a few
gale force gusts to 35 knots possible late. areas of dense fog
through early afternoon. a slight chance of thunderstorms through
early afternoon. a slight chance of rain showers. waves building
to 6 to 9 feet occasionally to 11 feet. 
.tuesday night...northwest winds 20 to 30 knots. waves subsiding
to 4 to 8 feet occasionally to 10 feet. 
.wednesday...northwest winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. waves subsiding to 2 to 4 feet. 
.wednesday night...northwest winds 5 to 15 knots backing south
after midnight. waves subsiding to calm to 2 feet. 
.thursday...south winds 5 to 15 knots backing east by mid
afternoon. waves calm to 2 feet. 
.thursday night...southeast winds 5 to 15 knots. waves calm to
2 feet. 
.friday...east winds 5 to 15 knots increasing to 10 to 20 knots.
waves calm to 2 feet. 
.saturday...east winds 10 to 20 knots veering southeast. waves
building to 1 to 3 feet, then subsiding to calm to 2 feet. 

$$