fzus63 kdtx 120721
glflh 
expires:202604121530;;232006

open lake forecast for lake huron
national weather service detroit/pontiac mi
321 am edt sun apr 12 2026

for waters beyond five nautical miles off shore on lake huron

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

.synopsis...high pressure exits this morning giving way to an
active stretch of weather. expect several rounds of showers,
thunderstorms, and gusty winds through thursday with multiple
passing disturbances.


lhz361-362-121530-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
lake huron from presque isle light to sturgeon point mi beyond
5nm off shore-
321 am edt sun apr 12 2026

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


$$

fzus63 kdtx 120721
glflh 
expires:202604121530;;232007

open lake forecast for lake huron
national weather service detroit/pontiac mi
321 am edt sun apr 12 2026

for waters beyond five nautical miles off shore on lake huron

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

.synopsis...high pressure exits this morning giving way to an
active stretch of weather. expect several rounds of showers,
thunderstorms, and gusty winds through thursday with multiple
passing disturbances.


lhz363-462>464-121530-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
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-
321 am edt sun apr 12 2026

.today...southeast winds 10 to 15 knots increasing to 15 to
20 knots in the late morning and afternoon. showers in the
morning...then showers likely in the afternoon. waves 3 to 5 feet
building to 5 to 7 feet in the afternoon. waves occasionally
around 10 feet. 
.tonight...south winds 15 to 20 knots becoming southwest 20 to
25 knots after midnight. showers likely. waves 5 to 7 feet. waves
occasionally around 10 feet. 
.monday...southwest winds 15 to 20 knots decreasing to 10 to
15 knots early in the afternoon. a chance of showers in the
morning. waves 4 to 6 feet. 
.monday night...north winds 5 to 10 knots veering to the east by
midnight...then becoming south 10 to 15 knots after midnight. a
chance of showers in the evening...then a chance of showers and
thunderstorms after midnight. waves 2 to 4 feet subsiding to 1 to
3 feet in the late evening and overnight. waves occasionally
around 8 feet. 
.tuesday...south winds 15 to 20 knots becoming southwest 10 to
15 knots. a chance of thunderstorms in the morning. a chance of
showers. showers likely late in the evening. waves 2 to 4 feet. 
.wednesday...north winds 5 to 10 knots increasing to 10 to
15 knots in the late morning and early afternoon...then veering
to the southeast . a chance of showers early in the morning.
showers likely . waves 3 to 5 feet. 
.thursday...south winds 15 to 20 knots becoming southwest 10 to
15 knots early in the evening...then becoming west 5 to 10 knots
by midnight. a chance of showers. waves 3 to 5 feet subsiding to
1 to 3 feet by midnight. 


$$

fzus63 kmkx 120718
glflm 
expires:202604121530;;231982

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
218 am cdt sun apr 12 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...

low pressure around 29.4 inches will track across the northern 
great plains to northeast minnesota into this evening, then 
develop toward the hudson bay into early tomorrow morning. this 
will bring breezy south winds to all of lake michigan, but with 
the potential for gales over the north half late sunday afternoon 
into early monday morning. a gale watch is now in effect.
decisions regarding gale warning upgrades will be made by early
this afternoon.

winds will weaken later monday morning as the low quickly moves 
away and the trailing cold front stalls over northern lake 
michigan. then, passing low pressure systems along the stalled 
front will lead to intermittent showers and thunderstorms through 
the middle of the week. areas of dense fog will likely occur at
times due to a relatively mild and humid airmass over the cold
waters.


lmz261-362-364-366-563-565-121530-
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-
218 am cdt sun apr 12 2026

two rivers wi to manistee mi north...

...gale watch in effect from this afternoon through late
tonight...

.today...southeast winds to 30 kt becoming south. patchy fog this
morning, then areas of fog this afternoon. rain showers with a
chance of thunderstorms this morning, then chance of rain showers
and thunderstorms this afternoon. waves 6 to 9 ft occasionally to
12 ft building to 7 to 10 ft occasionally to 13 ft. 
.tonight...south gales to 40 kt becoming southwest gales to
35 kt. areas of fog. chance of rain showers and slight chance of
thunderstorms in the evening, then slight chance of rain showers
overnight. waves 8 to 12 ft occasionally to 16 ft subsiding to
8 to 11 ft occasionally to 14 ft. 
.monday...southwest winds to 30 kt becoming west 10 to 20 kt late
in the morning, then becoming northwest early in the afternoon
veering to southeast 10 to 15 kt late. areas of dense fog in the
morning. waves 6 to 9 ft occasionally to 12 ft subsiding to 2 to
4 ft. 
.monday night...southeast winds 10 to 15 kt becoming south 10 to
20 kt. rain showers with a chance of thunderstorms. waves 2 to
4 ft building to 3 to 5 ft. 
.tuesday...southwest winds 10 to 20 kt diminishing to 10 to
15 kt. chance of rain showers in the afternoon. waves 3 to 5 ft. 
.tuesday night...northeast winds 10 to 15 kt increasing to 10 to
20 kt. chance of rain showers. waves 2 to 4 ft building to 4 to
6 ft occasionally to 8 ft. 
.wednesday...northeast winds 10 to 20 kt becoming east 10 to
15 kt. chance of rain showers. waves 4 to 7 ft occasionally to
9 ft. 
.thursday...southwest winds 10 to 20 kt veering to northwest.
chance of rain showers. waves 2 to 4 ft.  

$$

fzus63 kmkx 120718
glflm 
expires:202604121530;;231983

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
218 am cdt sun apr 12 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...

low pressure around 29.4 inches will track across the northern 
great plains to northeast minnesota into this evening, then 
develop toward the hudson bay into early tomorrow morning. this 
will bring breezy south winds to all of lake michigan, but with 
the potential for gales over the north half late sunday afternoon 
into early monday morning. a gale watch is now in effect.
decisions regarding gale warning upgrades will be made by early
this afternoon.

winds will weaken later monday morning as the low quickly moves 
away and the trailing cold front stalls over northern lake 
michigan. then, passing low pressure systems along the stalled 
front will lead to intermittent showers and thunderstorms through 
the middle of the week. areas of dense fog will likely occur at
times due to a relatively mild and humid airmass over the cold
waters.


lmz080-567-669-671-673-675-777-779-868-870-872-874-876-878-121530-
lake michigan from michigan city in to st. joseph mi 5 nm
offshore to mid lake-
lake michigan from two rivers to sheboygan wi 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 pentwater to manistee mi 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-
218 am cdt sun apr 12 2026

two rivers wi to manistee mi south...

.today...south winds to 30 kt. patchy fog. scattered rain showers
and slight chance of thunderstorms this morning, then chance of
rain showers and thunderstorms this afternoon. waves 6 to 9 ft
occasionally to 12 ft building to 7 to 10 ft occasionally to
13 ft. 
.tonight...southwest winds to 30 kt. a few gale force gusts
possible. patchy fog. rain showers likely with a chance of 
thunderstorms in the evening, then chance of rain showers and 
slight chance of thunderstorms overnight. waves 8 to 11 ft 
occasionally to 14 ft subsiding to 7 to 10 ft occasionally to 13 
ft. 
.monday...southwest winds 15 to 25 kt becoming south 10 to 20 kt.
chance of rain showers in the afternoon. waves 5 to 8 ft
occasionally to 10 ft subsiding to 2 to 4 ft. 
.monday night...south winds 10 to 20 kt becoming southwest 15 to
25 kt. rain showers likely with a chance of thunderstorms in the
evening, then chance of rain showers and thunderstorms overnight.
waves 3 to 5 ft building to 4 to 6 ft occasionally to 8 ft. 
.tuesday...southwest winds 15 to 25 kt becoming south 10 to
20 kt. waves 4 to 6 ft occasionally to 8 ft. 
.tuesday night...south winds 10 to 20 kt becoming southwest 15 to
25 kt. rain showers with a chance of thunderstorms. waves 3 to
5 ft building to 4 to 7 ft occasionally to 9 ft.
.wednesday...southwest winds 15 to 25 kt becoming south 10 to
20 kt. chance of rain showers. waves 5 to 8 ft occasionally to
10 ft. 
.thursday...southwest winds 10 to 20 kt becoming west. chance of
rain showers. waves 3 to 5 ft.  

$$

fzus63 kmqt 120756
glfls 
expires:202604122000;;232933

open lake forecast for lake superior
national weather service marquette mi
356 am edt sun apr 12 2026

for waters beyond 5 nautical miles of shore on lake superior.

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

.synopsis...

a 29.3 inch low developing on the lee of the northern rockies lifts 
northeast through northwestern ontario today before moving into far 
northern quebec by monday morning. another 29.5 inch low takes shape 
over the central plains on monday before lifting through the straits 
of mackinac at 29.6 inches monday night through tuesday morning. 
remnant troughing of around 29.7 to 29.8 inches remains over the 
upper great lakes the rest of the day tuesday before another low 
from the central plains lifts through the upper great lakes at 29.6 
inches wednesday night and thursday.



lsz162-122000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
356 am edt sun apr 12 2026 /256 am cdt sun apr 12 2026/

.early this morning...east winds 10 to 20 knots. rain showers
likely and a slight chance of thunderstorms. waves 1 to 3 feet
building to 2 to 4 feet. 
.today...east winds 10 to 20 knots backing northeast in the
afternoon. a chance of showers and thunderstorms. waves subsiding
to calm to 2 feet, then building to 1 to 3 feet. 
.tonight...west winds 5 to 15 knots increasing to 10 to 20 knots
after midnight, then diminishing to 5 to 15 knots late. a slight
chance of showers and thunderstorms through midnight. waves
subsiding to calm to 2 feet. 
.monday...northwest winds 5 to 15 knots veering northeast in the
afternoon, then veering east late. a slight chance of showers and
thunderstorms by mid afternoon. waves calm to 2 feet. 
.monday night...northeast winds 10 to 20 knots. rain showers
likely and a slight chance of thunderstorms through midnight,
then a chance of rain showers after midnight. waves building to
2 to 4 feet. 
.tuesday...northeast winds 10 to 20 knots diminishing to 5 to
15 knots by mid afternoon. waves subsiding to 1 to 3 feet. 
.tuesday night...northeast winds 5 to 15 knots. waves building to
2 to 4 feet. 
.wednesday...northeast winds 5 to 15 knots. a chance of rain
showers. waves subsiding to calm to 2 feet. 
.thursday...east winds 5 to 15 knots becoming northeast 10 to
20 knots. a chance of rain showers. waves building to 5 to 8 feet
occasionally to 10 feet. 

$$

fzus63 kmqt 120756
glfls 
expires:202604122000;;232934

open lake forecast for lake superior
national weather service marquette mi
356 am edt sun apr 12 2026

for waters beyond 5 nautical miles of shore on lake superior.

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

.synopsis...

a 29.3 inch low developing on the lee of the northern rockies lifts 
northeast through northwestern ontario today before moving into far 
northern quebec by monday morning. another 29.5 inch low takes shape 
over the central plains on monday before lifting through the straits 
of mackinac at 29.6 inches monday night through tuesday morning. 
remnant troughing of around 29.7 to 29.8 inches remains over the 
upper great lakes the rest of the day tuesday before another low 
from the central plains lifts through the upper great lakes at 29.6 
inches wednesday night and thursday.



lsz263-122000-
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-
356 am edt sun apr 12 2026

.early this morning...southeast winds 10 to 20 knots. rain
showers likely and a slight chance of thunderstorms. waves 2 to
4 feet building to 3 to 5 feet occasionally to 7 feet. 
.today...southeast winds 10 to 20 knots veering south late. a
chance of showers and thunderstorms. waves subsiding to 2 to
4 feet. 
.tonight...southwest winds 5 to 15 knots veering west after
midnight. a chance of rain showers and a slight chance of
thunderstorms through midnight. waves subsiding to calm to
2 feet. 
.monday...northwest winds 5 to 15 knots becoming northeast less
than 10 knots in the afternoon, then becoming east 5 to 15 knots
late. a slight chance of rain showers by mid afternoon. waves
calm to 2 feet. 
.monday night...east winds 10 to 20 knots backing northeast after
midnight. rain showers likely and a slight chance of
thunderstorms through midnight, then a chance of rain showers
after midnight. waves building to 2 to 4 feet. 
.tuesday...northeast winds 5 to 15 knots. waves subsiding to 1 to
3 feet. 
.tuesday night...northeast winds 5 to 15 knots. waves building to
2 to 4 feet. 
.wednesday...east winds 5 to 15 knots backing northeast. a chance
of rain showers. waves subsiding to calm to 2 feet, then building
to 1 to 3 feet. 
.thursday...northeast winds 5 to 15 knots becoming east 15 to
25 knots. waves subsiding to calm to 2 feet, then building to
5 to 8 feet occasionally to 10 feet. 

$$

fzus63 kmqt 120756
glfls 
expires:202604122000;;232935

open lake forecast for lake superior
national weather service marquette mi
356 am edt sun apr 12 2026

for waters beyond 5 nautical miles of shore on lake superior.

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

.synopsis...

a 29.3 inch low developing on the lee of the northern rockies lifts 
northeast through northwestern ontario today before moving into far 
northern quebec by monday morning. another 29.5 inch low takes shape 
over the central plains on monday before lifting through the straits 
of mackinac at 29.6 inches monday night through tuesday morning. 
remnant troughing of around 29.7 to 29.8 inches remains over the 
upper great lakes the rest of the day tuesday before another low 
from the central plains lifts through the upper great lakes at 29.6 
inches wednesday night and thursday.



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

.early this morning...southeast winds 20 to 30 knots. rain
showers likely. waves 3 to 6 feet occasionally to 8 feet building
to 4 to 7 feet occasionally to 9 feet. 
.today...southeast winds 20 to 30 knots diminishing to 15 to
25 knots in the afternoon, then becoming south 10 to 20 knots
late. a chance of showers and thunderstorms. waves building to
6 to 9 feet occasionally to 11 feet, then subsiding to 4 to
7 feet occasionally to 9 feet. 
.tonight...south winds 10 to 20 knots veering west after
midnight, then diminishing to 5 to 15 knots late. a chance of
rain showers and a slight chance of thunderstorms through
midnight. waves subsiding to 1 to 3 feet. 
.monday...northwest winds 5 to 15 knots veering northeast late.
waves subsiding to calm to 2 feet. 
.monday night...east winds 5 to 15 knots becoming northeast 10 to
20 knots after midnight. a slight chance of thunderstorms through
midnight. rain showers likely. waves building to 1 to 3 feet. 
.tuesday...northeast winds 5 to 15 knots. waves subsiding to calm
to 2 feet. 
.tuesday night...northeast winds 5 to 15 knots. waves building to
2 to 4 feet. 
.wednesday...east winds 5 to 15 knots. a chance of rain showers.
waves building to 3 to 5 feet occasionally to 7 feet, then
subsiding to calm to 2 feet. 
.thursday...northeast winds 5 to 15 knots becoming east 15 to
25 knots. waves subsiding to calm to 2 feet, then building to
5 to 8 feet occasionally to 10 feet. 

$$

fzus63 kmqt 120756
glfls 
expires:202604122000;;232936

open lake forecast for lake superior
national weather service marquette mi
356 am edt sun apr 12 2026

for waters beyond 5 nautical miles of shore on lake superior.

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

.synopsis...

a 29.3 inch low developing on the lee of the northern rockies lifts 
northeast through northwestern ontario today before moving into far 
northern quebec by monday morning. another 29.5 inch low takes shape 
over the central plains on monday before lifting through the straits 
of mackinac at 29.6 inches monday night through tuesday morning. 
remnant troughing of around 29.7 to 29.8 inches remains over the 
upper great lakes the rest of the day tuesday before another low 
from the central plains lifts through the upper great lakes at 29.6 
inches wednesday night and thursday.



lsz265-122000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
356 am edt sun apr 12 2026

.early this morning...southeast winds 15 to 25 knots. rain
showers. waves 3 to 6 feet occasionally to 8 feet. 
.today...southeast winds 15 to 25 knots veering south late. a
chance of showers and thunderstorms. waves building to 4 to
7 feet occasionally to 9 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet. 
.tonight...south winds 20 to 30 knots becoming west 15 to
25 knots after midnight. a chance of thunderstorms through
midnight. a chance of rain showers. waves subsiding to calm to
2 feet. 
.monday...northwest winds 10 to 20 knots becoming east 5 to
15 knots late. waves calm to 2 feet. 
.monday night...east winds 5 to 15 knots becoming northeast 10 to
20 knots after midnight. a slight chance of thunderstorms through
midnight. rain showers. waves building to 1 to 3 feet. 
.tuesday...northeast winds 10 to 20 knots backing north by mid
afternoon. waves subsiding to calm to 2 feet. 
.tuesday night...north winds 5 to 15 knots veering northeast
after midnight. waves building to 3 to 5 feet occasionally to
7 feet. 
.wednesday...east winds 10 to 20 knots. a chance of rain showers.
waves subsiding to calm to 2 feet, then building to 1 to 3 feet. 
.thursday...north winds 10 to 20 knots becoming southeast 15 to
25 knots. a chance of rain showers. waves subsiding to calm to
2 feet, then building to 5 to 8 feet occasionally to 10 feet. 

$$

fzus63 kmqt 120756
glfls 
expires:202604122000;;232937

open lake forecast for lake superior
national weather service marquette mi
356 am edt sun apr 12 2026

for waters beyond 5 nautical miles of shore on lake superior.

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

.synopsis...

a 29.3 inch low developing on the lee of the northern rockies lifts 
northeast through northwestern ontario today before moving into far 
northern quebec by monday morning. another 29.5 inch low takes shape 
over the central plains on monday before lifting through the straits 
of mackinac at 29.6 inches monday night through tuesday morning. 
remnant troughing of around 29.7 to 29.8 inches remains over the 
upper great lakes the rest of the day tuesday before another low 
from the central plains lifts through the upper great lakes at 29.6 
inches wednesday night and thursday.



lsz266-122000-
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-
356 am edt sun apr 12 2026

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

$$

fzus63 kmqt 120756
glfls 
expires:202604122000;;232938

open lake forecast for lake superior
national weather service marquette mi
356 am edt sun apr 12 2026

for waters beyond 5 nautical miles of shore on lake superior.

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

.synopsis...

a 29.3 inch low developing on the lee of the northern rockies lifts 
northeast through northwestern ontario today before moving into far 
northern quebec by monday morning. another 29.5 inch low takes shape 
over the central plains on monday before lifting through the straits 
of mackinac at 29.6 inches monday night through tuesday morning. 
remnant troughing of around 29.7 to 29.8 inches remains over the 
upper great lakes the rest of the day tuesday before another low 
from the central plains lifts through the upper great lakes at 29.6 
inches wednesday night and thursday.



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

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

$$