fzus63 kmkx 201252
glflm 
expires:202604202115;;691101

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
752 am cdt mon apr 20 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...

high pressure of 30.4 inches shifting over lower michigan today 
and low pressure around 29.7 inches developing in the plains will
bring increasing southerly winds to lake michigan through tuesday
morning.a few gales are possible tonight into early tuesday 
morning, especially over the northern third of the lake as low 
pressure around 29.5 inches also progresses across the hudson 
bay. a cold front from this low will progress southward through 
the lake tuesday afternoon and evening, shifting winds to 
northeasterly. high pressure around 30.4 inches builds into 
ontario on wednesday, bringing light and variable winds. winds 
will then become southeast and increase thursday into friday as 
strong low pressure around 29.2 inches develops in the northern 
plains.


lmz261-362-364-366-563-565-567-868-202115-
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-
752 am cdt mon apr 20 2026

sheboygan wi to pentwater mi north...

.rest of today...southwest winds 5 to 10 kt increasing to 10 to 
to 20 kt early this afternoon and becoming south 15 to 25 kt 
late. waves 1 to 3 ft building to 3 to 5 ft. 
.tonight...south winds to 30 kt. waves 5 to 8 ft occasionally to
10 ft. 
.tuesday...southwest winds to 30 kt diminishing to 10 to 15 kt.
waves 5 to 8 ft occasionally to 10 ft subsiding to 3 to 5 ft. 
.tuesday night...northeast winds 10 to 15 kt. waves 2 to 4 ft
subsiding to 1 to 3 ft. 
.wednesday...northeast winds 5 to 10 kt. waves 1 to 2 ft. 
.wednesday night...southeast winds 5 to 10 kt increasing to 10 to
20 kt. waves 1 ft or less building to 1 to 3 ft. 
.thursday...south winds 15 to 25 kt. waves 3 to 5 ft building to
4 to 7 ft occasionally to 9 ft. 
.friday...southeast winds to 30 kt becoming south 15 to 25 kt.
chance of rain showers. waves 7 to 10 ft occasionally to 13 ft.  

$$

fzus63 kmkx 201252
glflm 
expires:202604202115;;691102

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
752 am cdt mon apr 20 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...

high pressure of 30.4 inches shifting over lower michigan today 
and low pressure around 29.7 inches developing in the plains will
bring increasing southerly winds to lake michigan through tuesday
morning.a few gales are possible tonight into early tuesday 
morning, especially over the northern third of the lake as low 
pressure around 29.5 inches also progresses across the hudson 
bay. a cold front from this low will progress southward through 
the lake tuesday afternoon and evening, shifting winds to 
northeasterly. high pressure around 30.4 inches builds into 
ontario on wednesday, bringing light and variable winds. winds 
will then become southeast and increase thursday into friday as 
strong low pressure around 29.2 inches develops in the northern 
plains.


lmz080-669-671-673-675-777-779-870-872-874-876-878-202115-
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-
752 am cdt mon apr 20 2026

sheboygan wi to pentwater mi south...

.rest of today...southeast winds 5 to 10 kt becoming south 10 to 
20 kt early this afternoon, then becoming southeast 15 to 25 kt 
late. waves 1 to 3 ft building to 3 to 5 ft. 
.tonight...southeast winds 15 to 25 kt becoming south. waves 4 to
6 ft occasionally to 8 ft. 
.tuesday...south 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. 
.tuesday night...south winds 5 to 10 kt backing to north. waves
2 to 4 ft subsiding to 1 to 2 ft. 
.wednesday...northeast winds 5 to 10 kt becoming north. waves
1 to 2 ft. 
.wednesday night...east winds 10 to 15 kt becoming south 10 to
20 kt. waves 1 ft or less building to 1 to 3 ft. 
.thursday...south winds 10 to 20 kt increasing to 15 to 25 kt.
waves 3 to 5 ft building to 4 to 7 ft occasionally to 9 ft. 
.friday...south winds to 30 kt becoming southwest 10 to 20 kt.
showers likely. waves 6 to 9 ft occasionally to 12 ft.  

$$