fzus63 kmkx 210300
glflm 
expires:202601211015;;244907

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
900 pm cst tue jan 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...

west to southwest winds will continue tonight as high pressure of
30.6 inches tracks east across the eastern conus. weak low 
pressure around 30.0 inches tracks across southern lake michigan 
wednesday morning, with westerly winds behind it. southwest winds
reintensify for a brief period (wednesday afternoon and evening)
as a more organized low pressure system of 29.7 inches moves
across lake superior. 

winds will increase further and shift west to northwest wednesday
night, as another arctic cold front crosses lake michigan. gale
force gusts are forecast over the southern half of lake michigan,
where a gale warning is now in effect between 3 pm cst wednesday
and 6 am cst thursday. gusty west to northwest winds thursday 
will will turn mainly northwest friday, as strong high pressure 
around 30.9 inches builds into the northern great plains. a few 
gale force gusts may occur during this period.

arriving arctic air and elevated wave heights will support 
additional periods of moderate to potentially heavy freezing spray
wednesday night into friday night. the heavy freezing spray watch
has been upgraded to a heavy freezing spray warning in the evening
update.


lmz261-362-364-366-563-565-567-868-211015-
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-
900 pm cst tue jan 20 2026

sheboygan wi to pentwater mi north...

...heavy freezing spray warning in effect from wednesday evening
through late friday night...

.rest of tonight...southwest winds 15 to 25 kt becoming west
10 to 20 kt. freezing spray through early evening. chance of snow
overnight. waves 4 to 7 ft occasionally to 9 ft subsiding to 3 to
5 ft. 
.wednesday...west winds 10 to 15 kt increasing to 15 to 25 kt.
chance of snow. waves 4 to 6 ft occasionally to 8 ft. 
.wednesday night...west winds 15 to 25 kt increasing to 30 kt.
chance of snow in the evening. freezing spray. waves 6 to 9 ft
occasionally to 12 ft building to 7 to 10 ft occasionally to
13 ft. 
.thursday...west winds to 30 kt. heavy freezing spray. waves 8 to
11 ft occasionally to 14 ft subsiding to 6 to 9 ft occasionally
to 12 ft. 
.thursday night...west gales to 35 kt becoming northwest. heavy
freezing spray. waves 7 to 10 ft occasionally to 13 ft.
.friday...northwest winds to 30 kt. heavy freezing spray. waves
7 to 10 ft occasionally to 13 ft. 
.friday night...northwest 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. 
.saturday...northwest winds 10 to 15 kt becoming west. waves 2 to
4 ft subsiding to 1 to 3 ft. 
.sunday...west winds 10 to 15 kt. waves 1 to 3 ft.  

$$

fzus63 kmkx 210300
glflm 
expires:202601211015;;244908

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
900 pm cst tue jan 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...

west to southwest winds will continue tonight as high pressure of
30.6 inches tracks east across the eastern conus. weak low 
pressure around 30.0 inches tracks across southern lake michigan 
wednesday morning, with westerly winds behind it. southwest winds
reintensify for a brief period (wednesday afternoon and evening)
as a more organized low pressure system of 29.7 inches moves
across lake superior. 

winds will increase further and shift west to northwest wednesday
night, as another arctic cold front crosses lake michigan. gale
force gusts are forecast over the southern half of lake michigan,
where a gale warning is now in effect between 3 pm cst wednesday
and 6 am cst thursday. gusty west to northwest winds thursday 
will will turn mainly northwest friday, as strong high pressure 
around 30.9 inches builds into the northern great plains. a few 
gale force gusts may occur during this period.

arriving arctic air and elevated wave heights will support 
additional periods of moderate to potentially heavy freezing spray
wednesday night into friday night. the heavy freezing spray watch
has been upgraded to a heavy freezing spray warning in the evening
update.


lmz080-669-671-673-675-777-779-870-872-874-876-878-211015-
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-
900 pm cst tue jan 20 2026

sheboygan wi to pentwater mi south...

...gale warning in effect from wednesday afternoon through late
thursday night...
...heavy freezing spray warning in effect from wednesday evening
through late friday night...

.rest of tonight...southwest winds 10 to 20 kt increasing to
15 to 25 kt. chance of snow through early evening, then snow
overnight. waves 4 to 7 ft occasionally to 9 ft. 
.wednesday...west winds 15 to 25 kt increasing to 30 kt. chance
of snow. waves 4 to 7 ft occasionally to 9 ft. 
.wednesday night...southwest winds to 30 kt becoming west gales
to 35 kt. snow likely in the evening. freezing spray overnight.
waves 6 to 9 ft occasionally to 12 ft building to 8 to 12 ft
occasionally to 16 ft. 
.thursday...west winds to 30 kt. freezing spray. chance of snow
in the afternoon. waves 8 to 12 ft occasionally to 16 ft
subsiding to 8 to 11 ft occasionally to 14 ft. 
.thursday night...west gales to 35 kt becoming northwest to
30 kt. chance of snow in the evening. heavy freezing spray. waves
8 to 12 ft occasionally to 16 ft. 
.friday...northwest winds to 30 kt. heavy freezing spray. chance
of snow. waves 8 to 12 ft occasionally to 16 ft subsiding to 7 to
10 ft occasionally to 13 ft. 
.friday night...northwest winds 15 to 25 kt diminishing to 10 to
20 kt. heavy freezing spray. waves 5 to 8 ft occasionally to
10 ft subsiding to 4 to 6 ft occasionally to 8 ft. 
.saturday...northwest winds 10 to 15 kt becoming west. waves 3 to
5 ft. 
.sunday...north winds 10 to 15 kt becoming northwest. chance of
snow. waves 3 to 5 ft.  

$$