fzus63 kmkx 202007
glflm 
expires:202604210315;;708364

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
307 pm 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 around 30.4 inches over lower michigan 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.


lmz261-362-364-366-563-565-567-868-210315-
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-
307 pm cdt mon apr 20 2026

sheboygan wi to pentwater mi north...

.tonight...south winds to 30 kt. waves 4 to 7 ft occasionally to
9 ft. 
.tuesday...southwest winds 15 to 25 kt diminishing to 10 to 20 kt
late in the morning, then diminishing to 10 to 15 kt early in the
afternoon becoming west late. waves 4 to 7 ft occasionally to
9 ft subsiding to 3 to 5 ft. 
.tuesday night...northeast winds 5 to 10 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...east winds 5 to 10 kt becoming southeast
overnight. 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 2 to 4 ft building to 4 to 6 ft occasionally to 8 ft. 
.thursday night...southeast winds 15 to 25 kt increasing to
30 kt. chance of rain showers. waves 6 to 9 ft occasionally to
12 ft. 
.friday...south winds 15 to 25 kt diminishing to 10 to 20 kt.
chance of rain showers. waves 5 to 8 ft occasionally to 10 ft
subsiding to 4 to 7 ft occasionally to 9 ft. 
.saturday...north winds 10 to 20 kt. waves 3 to 5 ft.  

$$

fzus63 kmkx 202007
glflm 
expires:202604210315;;708365

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
307 pm 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 around 30.4 inches over lower michigan 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.


lmz080-669-671-673-675-777-779-870-872-874-876-878-210315-
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-
307 pm cdt mon apr 20 2026

sheboygan wi to pentwater mi south...

.tonight...southeast winds 15 to 25 kt becoming south. waves 4 to
7 ft occasionally to 9 ft. 
.tuesday...south winds 15 to 25 kt diminishing to 10 to 20 kt.
waves 4 to 7 ft occasionally to 9 ft subsiding to 3 to 5 ft. 
.tuesday night...northeast winds 10 to 15 kt becoming north 5 to
10 kt. 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 5 to 10 kt becoming south 10 to
15 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 2 to 4 ft building to 4 to 6 ft occasionally to 8 ft. 
.thursday night...south winds 15 to 25 kt. chance of showers.
waves 5 to 8 ft occasionally to 10 ft. 
.friday...south winds 15 to 25 kt diminishing to 10 to 20 kt.
showers likely. waves 5 to 8 ft occasionally to 10 ft subsiding
to 4 to 7 ft occasionally to 9 ft. 
.saturday...north winds 10 to 20 kt. waves 4 to 6 ft occasionally
to 8 ft.  

$$