fzus63 kmkx 110221
glflm 
expires:202604110915;;165436

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
921 pm cdt fri apr 10 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 will continue to build over the 
western great lakes region tonight into saturday morning, causing 
winds to become light and variable. southeast winds return 
saturday afternoon and become gusty saturday night as a sharper 
pressure gradient moves over the lake as low pressure moves into 
the northern great plains.

low pressure will shift into the northern great plains during the
day sunday as it deepens to near 29.4 inches. the low will quickly
shift east toward lake superior sunday night, reaching the
southern shores of the hudson bay by daybreak monday morning.
winds will thus increase further across the open waters sunday
through sunday night. will be monitoring for gale potential
during this time frame, particularly over the northern half of
lake michigan. as of this forecast update, forecast models
continue to suggest possible gales and headlines may be needed in
the coming days. 

winds will weaken monday morning as high pressure of 30.0 inches 
moves across ontario. then, passing low pressure systems will lead
to persistently active conditions across lake michigan into next 
week. will need to monitor thunderstorm development during the 
monday- wednesday time period, as some storms could become strong 
to severe.


lmz261-362-364-366-563-565-567-868-110915-
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-
921 pm cdt fri apr 10 2026

sheboygan wi to pentwater mi north...

.rest of tonight...northeast winds 5 to 10 kt veering to
southwest. waves 1 to 2 ft. 
.saturday...south winds 5 to 10 kt becoming southwest 10 to
20 kt. waves 1 to 3 ft. 
.saturday night...south winds 10 to 20 kt becoming southeast to
30 kt. chance of rain showers in the evening, then rain showers
overnight. waves 1 to 3 ft building to 4 to 6 ft occasionally to
8 ft. 
.sunday...south winds to 30 kt. rain showers with a chance of
thunderstorms in the morning, then rain showers likely with a
chance of thunderstorms in the afternoon. waves 6 to 9 ft
occasionally to 12 ft. 
.sunday night...southwest gales to 40 kt. rain showers likely.
waves 8 to 11 ft occasionally to 14 ft. 
.monday...southwest winds to 30 kt diminishing to 10 to 20 kt in
the afternoon. waves 6 to 9 ft occasionally to 12 ft subsiding to
4 to 6 ft occasionally to 8 ft. 
.monday night...east winds 10 to 20 kt becoming southeast 15 to
25 kt. rain showers likely with a chance of thunderstorms. waves
2 to 4 ft building to 4 to 6 ft occasionally to 8 ft. 
.tuesday...south winds 15 to 25 kt diminishing to 10 to 20 kt.
rain showers likely with a chance of thunderstorms. waves 4 to
7 ft occasionally to 9 ft. 
.wednesday...southwest winds to 30 kt diminishing to 15 to 25 kt.
chance of rain showers. waves 6 to 9 ft occasionally to 12 ft.  

$$

fzus63 kmkx 110221
glflm 
expires:202604110915;;165437

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
921 pm cdt fri apr 10 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 will continue to build over the 
western great lakes region tonight into saturday morning, causing 
winds to become light and variable. southeast winds return 
saturday afternoon and become gusty saturday night as a sharper 
pressure gradient moves over the lake as low pressure moves into 
the northern great plains.

low pressure will shift into the northern great plains during the
day sunday as it deepens to near 29.4 inches. the low will quickly
shift east toward lake superior sunday night, reaching the
southern shores of the hudson bay by daybreak monday morning.
winds will thus increase further across the open waters sunday
through sunday night. will be monitoring for gale potential
during this time frame, particularly over the northern half of
lake michigan. as of this forecast update, forecast models
continue to suggest possible gales and headlines may be needed in
the coming days. 

winds will weaken monday morning as high pressure of 30.0 inches 
moves across ontario. then, passing low pressure systems will lead
to persistently active conditions across lake michigan into next 
week. will need to monitor thunderstorm development during the 
monday- wednesday time period, as some storms could become strong 
to severe.


lmz080-669-671-673-675-777-779-870-872-874-876-878-110915-
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-
921 pm cdt fri apr 10 2026

sheboygan wi to pentwater mi south...

.rest of tonight...northeast winds 10 to 15 kt becoming east.
waves 1 to 3 ft. 
.saturday...southeast winds 5 to 10 kt becoming east 10 to 20 kt.
waves 1 to 2 ft. 
.saturday night...east winds 10 to 15 kt becoming southeast 10 to
20 kt late in the evening, then increasing to 15 to 25 kt after
midnight becoming southeast 15 to 25 kt late. chance of rain
showers. waves 1 to 3 ft building to 4 to 6 ft occasionally to
8 ft. 
.sunday...south winds to 30 kt. chance of rain showers. waves
6 to 9 ft occasionally to 12 ft. 
.sunday night...southwest gales to 35 kt. rain showers in the
evening, then rain showers likely overnight. waves 7 to 10 ft
occasionally to 13 ft. 
.monday...southwest winds to 30 kt becoming south 10 to 20 kt in
the afternoon. chance of rain showers in the morning. waves 6 to
9 ft occasionally to 12 ft subsiding to 4 to 6 ft occasionally to
8 ft. 
.monday night...south winds 10 to 20 kt increasing to 15 to
25 kt. chance of rain showers. waves 2 to 4 ft building to 4 to
6 ft occasionally to 8 ft. 
.tuesday...south winds 15 to 25 kt diminishing to 10 to 20 kt.
chance of rain showers and thunderstorms. waves 4 to 7 ft
occasionally to 9 ft. 
.wednesday...southwest winds to 30 kt diminishing to 15 to 25 kt.
chance of rain showers. waves 6 to 9 ft occasionally to 12 ft.  

$$