fzus63 kdtx 182223 aaa
glflh 
expires:202605190630;;790896

open lake forecast for lake huron...updated
national weather service detroit/pontiac mi
623 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...strong to severe thunderstorms are likely this
afternoon-evening and again possible tuesday as a cold front
sweeps across the region. high pressure, 30.50 inches, then
builds in mid-week.


lhz362-363-190630-
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-
623 pm edt mon may 18 2026

.tonight...south winds 10 to 15 knots increasing to 15 to
20 knots early in the morning. showers and a chance of
thunderstorms in the evening. waves 4 to 6 feet. waves
occasionally around 8 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 4 to 6 feet building to 6 to 9 feet in the
afternoon. waves occasionally around 12 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 1 to 3 feet. 
.friday...east winds 5 to 10 knots increasing to 15 to 20 knots.
waves 1 to 3 feet building to 2 to 4 feet by midnight. 
.saturday...east winds 15 to 20 knots decreasing to 10 to
15 knots . a chance of showers. waves 2 to 4 feet subsiding to
1 to 3 feet by midnight. 


$$

fzus63 kdtx 182223 aaa
glflh 
expires:202605190630;;790895

open lake forecast for lake huron...updated
national weather service detroit/pontiac mi
623 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...strong to severe thunderstorms are likely this
afternoon-evening and again possible tuesday as a cold front
sweeps across the region. high pressure, 30.50 inches, then
builds in mid-week.


lhz361-190630-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
623 pm edt mon may 18 2026

.tonight...southeast winds 5 to 10 knots backing to the east by
midnight...then veering to the south early in the morning. a
chance of showers and thunderstorms in the evening. waves 2 to
4 feet subsiding to 1 to 3 feet in the late evening and
overnight. 
.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 2 to 4 feet. 


$$

fzus63 kdtx 182223 aaa
glflh 
expires:202605190630;;790897

open lake forecast for lake huron...updated
national weather service detroit/pontiac mi
623 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...strong to severe thunderstorms are likely this
afternoon-evening and again possible tuesday as a cold front
sweeps across the region. high pressure, 30.50 inches, then
builds in mid-week.


lhz462>464-190630-
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-
623 pm edt mon may 18 2026

.tonight...south winds 10 to 15 knots. showers and a chance of
thunderstorms in the evening. waves 3 to 5 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. waves
occasionally around 8 feet. 
.wednesday night...north winds 10 to 15 knots. waves 3 to 5 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
2 to 4 feet by midnight. 
.saturday...east winds 15 to 20 knots decreasing to 10 to
15 knots. a chance of showers. waves 2 to 4 feet subsiding to
1 to 3 feet. 


$$

fzus63 kmkx 181952
glflm 
expires:202605190330;;784557

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
252 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...

storms and showers are pushing out as winds behind this remain
breezy from the south. these winds will increase slightly 
across the lake late tonight and remain breezy ahead of the cold
frontal passage expected tuesday afternoon as the low pressure 
system around 29.6 inches swings northeast of the lake into 
ontario. a few storms chances across primarily the south part of
the lake late tonight into tuesday morning ahead of the front. 
high pressure around 30.4 inches will push in behind the front 
with light and variable winds taking hold from late wednesday 
into thursday.


lmz261-362-364-366-563-565-567-868-190330-
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-
252 pm cdt mon may 18 2026

sheboygan wi to pentwater mi north...

.tonight...south winds 10 to 20 kt increasing to 30 kt. patchy
fog this evening, then areas of dense fog overnight. chance of
showers and thunderstorms overnight. waves 3 to 5 ft building to
4 to 7 ft occasionally to 9 ft. 
.tuesday...south winds to 30 kt becoming west 15 to 25 kt. patchy
fog. 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
subsiding to 2 to 4 ft. 
.wednesday...north winds 15 to 25 kt. waves 2 to 4 ft. 
.wednesday night...northeast winds 10 to 20 kt diminishing to
5 to 10 kt overnight. waves 1 to 3 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 2 to 4 ft.  

$$

fzus63 kmkx 181952
glflm 
expires:202605190330;;784558

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
252 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...

storms and showers are pushing out as winds behind this remain
breezy from the south. these winds will increase slightly 
across the lake late tonight and remain breezy ahead of the cold
frontal passage expected tuesday afternoon as the low pressure 
system around 29.6 inches swings northeast of the lake into 
ontario. a few storms chances across primarily the south part of
the lake late tonight into tuesday morning ahead of the front. 
high pressure around 30.4 inches will push in behind the front 
with light and variable winds taking hold from late wednesday 
into thursday.


lmz080-669-671-673-675-777-779-870-872-874-876-878-190330-
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-
252 pm cdt mon may 18 2026

sheboygan wi to pentwater mi south...

.tonight...south winds 10 to 20 kt increasing to 30 kt. slight
chance of showers and thunderstorms this evening, then chance of
showers and thunderstorms overnight. patchy fog overnight. waves
3 to 5 ft building to 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. 
.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 1 to 3 ft.  

$$

fzus63 kmqt 182002
glfls 
expires:202605190800;;785038

open lake forecast for lake superior
national weather service marquette mi
401 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... 

low pressure will weaken to 29.9 inches over lake superior tonight. 
another low will follow, reaching lake superior by tuesday morning 
at 29.6 inches. 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 30.1 
inches over lake superior into friday. a 29.9 inch low lifts into 
the great lakes from the southern plains for 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-
401 pm edt mon may 18 2026

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

.late this afternoon...north winds 10 to 20 knots. patchy fog.
waves calm to 2 feet. 
.tonight...northeast winds 10 to 20 knots becoming east 5 to
15 knots after midnight, then increasing to 10 to 20 knots late.
patchy fog through midnight. areas of dense fog after midnight. a
chance of rain showers through midnight. a chance of
thunderstorms. rain showers after midnight. waves 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 fog through
early afternoon. a chance of rain showers through early
afternoon. waves building to 3 to 6 feet occasionally to 8 feet. 
.tuesday night...northwest winds 15 to 25 knots. waves building
to 3 to 6 feet occasionally to 8 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 2 to 4 feet. 
.thursday night...southeast winds 10 to 20 knots becoming south
5 to 15 knots after midnight. waves subsiding to 1 to 3 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 182002
glfls 
expires:202605190800;;785039

open lake forecast for lake superior
national weather service marquette mi
401 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... 

low pressure will weaken to 29.9 inches over lake superior tonight. 
another low will follow, reaching lake superior by tuesday morning 
at 29.6 inches. 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 30.1 
inches over lake superior into friday. a 29.9 inch low lifts into 
the great lakes from the southern plains for 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-
401 pm edt mon may 18 2026

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

.late this afternoon...north winds 10 to 20 knots. patchy fog.
waves 1 to 3 feet. 
.tonight...northeast winds 10 to 20 knots veering southeast late.
areas of dense fog. a chance of rain showers through midnight. a
chance of thunderstorms. rain showers likely after midnight.
waves building to 3 to 5 feet occasionally to 7 feet, then
subsiding to 2 to 4 feet. 
.tuesday...south winds 15 to 25 knots becoming northwest 20 to
30 knots in the afternoon. patchy 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 8 feet occasionally to 10 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 building to 2 to 4 feet, then subsiding to
1 to 3 feet. 
.friday...east winds 10 to 20 knots. waves 1 to 3 feet. 
.saturday...east winds 10 to 20 knots veering southeast. waves
subsiding to calm to 2 feet. 

$$

fzus63 kmqt 182002
glfls 
expires:202605190800;;785040

open lake forecast for lake superior
national weather service marquette mi
401 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... 

low pressure will weaken to 29.9 inches over lake superior tonight. 
another low will follow, reaching lake superior by tuesday morning 
at 29.6 inches. 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 30.1 
inches over lake superior into friday. a 29.9 inch low lifts into 
the great lakes from the southern plains for 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-
401 pm edt mon may 18 2026

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

.late this afternoon...northeast winds 5 to 15 knots. areas of
dense fog. waves calm to 2 feet. 
.tonight...east winds 10 to 20 knots becoming southeast 15 to
25 knots late. areas of dense fog. a chance of showers and
thunderstorms. waves building to 1 to 3 feet. 
.tuesday...south winds 15 to 25 knots becoming west 20 to
30 knots in the afternoon, then becoming northwest to 30 knots
with a few gale force gusts to 35 knots possible late. areas of
dense fog through early afternoon. patchy fog by mid afternoon. a
slight chance of thunderstorms through early afternoon. a chance
of rain showers. waves building to 5 to 8 feet occasionally to
10 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 building to 1 to 3 feet, then subsiding to calm to 2 feet. 
.saturday...east winds 10 to 20 knots veering southeast. waves
calm to 2 feet. 

$$

fzus63 kmqt 182002
glfls 
expires:202605190800;;785037

open lake forecast for lake superior
national weather service marquette mi
401 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... 

low pressure will weaken to 29.9 inches over lake superior tonight. 
another low will follow, reaching lake superior by tuesday morning 
at 29.6 inches. 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 30.1 
inches over lake superior into friday. a 29.9 inch low lifts into 
the great lakes from the southern plains for 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-
401 pm edt mon may 18 2026

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

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

$$

fzus63 kmqt 182002
glfls 
expires:202605190800;;785036

open lake forecast for lake superior
national weather service marquette mi
401 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... 

low pressure will weaken to 29.9 inches over lake superior tonight. 
another low will follow, reaching lake superior by tuesday morning 
at 29.6 inches. 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 30.1 
inches over lake superior into friday. a 29.9 inch low lifts into 
the great lakes from the southern plains for 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-
401 pm edt mon may 18 2026

.late this afternoon...northeast winds 10 to 20 knots. patchy
fog. waves 1 to 3 feet. 
.tonight...northeast winds 15 to 25 knots. patchy fog. a chance
of rain showers through midnight. a chance of thunderstorms. rain
showers after midnight. waves 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 building to 1 to 3 feet. 
.friday...east winds 10 to 20 knots. waves subsiding to calm to
2 feet, then building to 1 to 3 feet. 
.saturday...east winds 5 to 15 knots. a chance of rain showers.
waves subsiding to calm to 2 feet. 

$$

fzus63 kmqt 182002
glfls 
expires:202605190800;;785035

open lake forecast for lake superior
national weather service marquette mi
401 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... 

low pressure will weaken to 29.9 inches over lake superior tonight. 
another low will follow, reaching lake superior by tuesday morning 
at 29.6 inches. 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 30.1 
inches over lake superior into friday. a 29.9 inch low lifts into 
the great lakes from the southern plains for 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-
401 pm edt mon may 18 2026 /301 pm cdt mon may 18 2026/

.late this afternoon...northeast winds 5 to 15 knots. patchy fog.
waves 1 to 3 feet. 
.tonight...northeast winds 10 to 20 knots increasing to 15 to
25 knots after midnight. patchy fog. a chance of showers and
thunderstorms through midnight. rain showers after midnight.
waves building to 3 to 6 feet occasionally to 8 feet. 
.tuesday...west winds 10 to 20 knots. patchy fog through early
afternoon. a 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 building to
1 to 3 feet, then subsiding to calm to 2 feet. 
.friday...east winds 10 to 20 knots backing northeast. a chance
of rain showers. waves building to 1 to 3 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 calm to 2 feet. 

$$