fzus63 kmkx 131419
glflm 
expires:202604132115;;300213

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
919 am cdt mon apr 13 2026

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

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

.synopsis...

a broad area of low pressure around 29.4 inches will become 
deeper over southern hudson bay this morning. this will bring 
continued breezy south winds to all of lake michigan. winds will 
weaken later this morning as the aforementioned area of low 
pressure quickly moves away and the trailing cold front stalls 
over central lake michigan. then, a couple passing low pressure 
system 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. will be monitoring observational 
trends and issuing dense fog advisories should conditions warrant.


lmz261-362-364-366-563-565-567-868-132115-
lake michigan from seul choix point to rock island passage 5 nm
offshore to mid lake-
lake michigan south of a line from seul choix point to the
mackinac bridge and north of a line from charlevoix mi to south
fox island 5 nm offshore-
lake michigan from charlevoix to point betsie mi 5 nm offshore to
mid lake-
lake michigan from point betsie to manistee mi 5 nm offshore to
mid lake-
lake michigan from rock island passage to sturgeon bay wi-
lake michigan from sturgeon bay to two rivers wi 5 nm offshore to
mid lake-
lake michigan from two rivers to sheboygan wi 5 nm offshore to
mid lake-
lake michigan from pentwater to manistee mi 5 nm offshore to mid
lake-
919 am cdt mon apr 13 2026

sheboygan wi to pentwater mi north...

...dense fog advisory in effect until 7 am cdt tuesday...

.rest of today...northwest winds 10 to 20 kt veering to east
10 to 15 kt. patchy dense fog. waves 4 to 6 ft occasionally to
8 ft subsiding to 2 to 4 ft. 
.tonight...east winds 10 to 15 kt becoming southeast 10 to 20 kt.
patchy dense fog in the evening. 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 becoming south 10 to
15 kt. waves 4 to 6 ft occasionally to 8 ft subsiding to 3 to
5 ft. 
.tuesday night...northeast winds 10 to 15 kt becoming north 5 to
10 kt. chance of rain showers and thunderstorms in the evening,
then chance of rain showers overnight. waves 2 to 4 ft. 
.wednesday...north winds 5 to 10 kt becoming northeast 10 to
15 kt. chance of rain showers. waves 1 to 3 ft. 
.wednesday night...northeast winds 10 to 15 kt becoming east.
rain showers likely. waves 1 to 3 ft building to 2 to 4 ft. 
.thursday...southeast winds 10 to 20 kt veering to west. chance
of rain showers. waves 3 to 5 ft. 
.friday...southeast winds 10 to 20 kt. waves 2 to 4 ft building
to 3 to 5 ft.  

$$

fzus63 kmkx 131419
glflm 
expires:202604132115;;300214

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
919 am cdt mon apr 13 2026

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

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

.synopsis...

a broad area of low pressure around 29.4 inches will become 
deeper over southern hudson bay this morning. this will bring 
continued breezy south winds to all of lake michigan. winds will 
weaken later this morning as the aforementioned area of low 
pressure quickly moves away and the trailing cold front stalls 
over central lake michigan. then, a couple passing low pressure 
system 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. will be monitoring observational 
trends and issuing dense fog advisories should conditions warrant.


lmz080-669-671-673-675-777-779-870-872-874-876-878-132115-
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-
919 am cdt mon apr 13 2026

sheboygan wi to pentwater mi south...

.rest of today...southwest winds 10 to 20 kt becoming south.
patchy dense fog. chance of rain showers and thunderstorms this
afternoon. waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to
4 ft. 
.tonight...south winds 10 to 20 kt increasing to 15 to 25 kt late
in the evening, then increasing to 30 kt after midnight becoming
southwest late. patchy dense fog in the evening. chance of rain
showers and thunderstorms. waves 1 to 3 ft building to 4 to 6 ft
occasionally to 8 ft. 
.tuesday...southwest winds 15 to 25 kt becoming south 10 to
20 kt. chance of rain showers and thunderstorms in the afternoon.
waves 4 to 6 ft occasionally to 8 ft subsiding to 3 to 5 ft. 
.tuesday night...southwest winds 10 to 20 kt becoming west. rain
showers with a chance of thunderstorms. waves 2 to 4 ft. 
.wednesday...west winds 10 to 15 kt backing to southeast 10 to
20 kt. chance of rain showers in the morning, then rain showers
with a chance of thunderstorms in the afternoon. waves 2 to 4 ft.
.wednesday night...south winds 10 to 20 kt. rain showers with a
chance of thunderstorms. waves 1 to 3 ft building to 3 to 5 ft. 
.thursday...southwest winds 10 to 20 kt. chance of rain showers.
waves 3 to 5 ft. 
.friday...southeast winds 10 to 20 kt. waves 2 to 4 ft building
to 3 to 5 ft.  

$$

fzus63 kmkx 130811
glflm 
expires:202604131515;;287674

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
311 am cdt mon apr 13 2026

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

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

.synopsis...

a broad area of low pressure around 29.4 inches will become 
deeper over southern hudson bay through daybreak. this will bring
continued breezy south winds to all of lake michigan. gusts have 
decreased below gale force across northern lake michigan, where 
the gale warning has been allowed to expire as of 3 am cdt.

winds will weaken later this morning as the aforementioned area 
of low pressure quickly moves away and the trailing cold front 
stalls over central lake michigan. then, a couple passing low 
pressure system 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. will be monitoring
observational trends and issuing dense fog advisories should
conditions warrant.


lmz261-362-364-366-563-565-131515-
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-
311 am cdt mon apr 13 2026

two rivers wi to manistee mi north...

.today...west winds to 30 kt becoming northwest 10 to 20 kt late
this morning, then becoming north 10 to 15 kt early this
afternoon veering to east late. patchy fog this morning. waves
6 to 9 ft occasionally to 12 ft subsiding to 2 to 4 ft. 
.tonight...east winds 10 to 15 kt becoming southeast 10 to 20 kt.
chance of rain showers and thunderstorms in the evening, then
rain showers with a chance of thunderstorms overnight. waves 1 to
3 ft building to 3 to 5 ft. 
.tuesday...southwest winds 10 to 20 kt becoming south 10 to
15 kt. chance of rain showers in the morning. waves 3 to 5 ft. 
.tuesday night...northeast winds 10 to 15 kt diminishing to 5 to
10 kt. chance of rain showers and thunderstorms in the evening,
then chance of rain showers overnight. waves 2 to 4 ft. 
.wednesday...north winds 5 to 10 kt becoming northeast. waves
1 to 3 ft. 
.wednesday night...northeast winds 10 to 15 kt becoming east.
rain showers likely. waves 1 to 2 ft building to 2 to 4 ft. 
.thursday...southeast winds 10 to 15 kt veering to west 10 to
20 kt. chance of rain showers. waves 2 to 4 ft. 
.friday...southeast winds 10 to 20 kt. waves 2 to 4 ft building
to 3 to 5 ft.  

$$

fzus63 kmkx 130811
glflm 
expires:202604131515;;287675

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
311 am cdt mon apr 13 2026

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

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

.synopsis...

a broad area of low pressure around 29.4 inches will become 
deeper over southern hudson bay through daybreak. this will bring
continued breezy south winds to all of lake michigan. gusts have 
decreased below gale force across northern lake michigan, where 
the gale warning has been allowed to expire as of 3 am cdt.

winds will weaken later this morning as the aforementioned area 
of low pressure quickly moves away and the trailing cold front 
stalls over central lake michigan. then, a couple passing low 
pressure system 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. will be monitoring
observational trends and issuing dense fog advisories should
conditions warrant.


lmz080-567-669-671-673-675-777-779-868-870-872-874-876-878-131515-
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-
311 am cdt mon apr 13 2026

two rivers wi to manistee mi south...

.today...southwest winds 15 to 25 kt becoming south 10 to 20 kt.
patchy fog. waves 5 to 8 ft occasionally to 10 ft subsiding to
2 to 4 ft. 
.tonight...south winds 10 to 20 kt increasing to 15 to 25 kt late
in the evening, then increasing to 30 kt after midnight becoming
southwest late. patchy fog in the evening. slight chance of rain
showers and thunderstorms in the evening, then chance of rain
showers and thunderstorms overnight. waves 1 to 3 ft building to
4 to 6 ft occasionally to 8 ft. 
.tuesday...southwest winds 15 to 25 kt becoming south 10 to
20 kt. chance of rain showers and thunderstorms in the afternoon.
waves 4 to 6 ft occasionally to 8 ft subsiding to 3 to 5 ft. 
.tuesday night...southwest winds 10 to 20 kt becoming west.
chance of rain showers and thunderstorms. waves 2 to 4 ft. 
.wednesday...northwest winds 10 to 15 kt backing to southeast
10 to 20 kt. chance of rain showers in the morning, then rain
showers in the afternoon. waves 2 to 4 ft. 
.wednesday night...southeast winds 10 to 20 kt becoming south.
rain showers with a chance of thunderstorms. waves 1 to 3 ft
building to 3 to 5 ft. 
.thursday...southwest winds 10 to 20 kt. chance of rain showers.
waves 3 to 5 ft. 
.friday...southeast winds 10 to 20 kt. waves 2 to 4 ft building
to 3 to 5 ft.  

$$