fzus63 kmkx 300921 aaa
glflm 
expires:202512301615;;486935

open lake forecast for lake michigan...updated
national weather service milwaukee/sullivan wi
321 am cst tue dec 30 2025

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...

winds have fallen below gales, but gusty northwesterly winds and
moderate freezing spray concerns continue this morning as lake
michigan sits between strong low pressure around 28.9 inches
meandering over quebec and a high pressure around 30.6 inches 
moving south across the plains. will then see the gusty winds 
shift more westerly this afternoon as an area of weak low pressure
around 29.9 inches and cold front slides down across the region. 
northwesterly winds return overnight behind the frontal passage 
with a few gale force gusts possible across the far northern 
portions of the lake. will see another cold front move down across
the lake wednesday with northwesterly winds prevailing through 
the end of the week. behind the front, colder arctic air will 
settle over the region as high pressure around 30.3 inches builds 
down across the upper great lakes region wednesday night into 
thursday. could see additional freezing spray concern through the 
end of the week given breezy winds and the colder airmass.


lmz261-362-364-366-563-565-567-868-301615-
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-
321 am cst tue dec 30 2025

sheboygan wi to pentwater mi north...

.today...northwest winds to 30 kt becoming west 15 to 25 kt.
freezing spray this morning. slight chance of snow this morning,
then snow likely this afternoon. waves 7 to 10 ft occasionally to
13 ft subsiding to 4 to 6 ft occasionally to 8 ft. 
.tonight...northwest winds 15 to 25 kt. chance of snow in the
evening, then slight chance of snow overnight. waves 4 to 7 ft
occasionally to 9 ft. 
.wednesday...northwest winds 15 to 25 kt increasing to 30 kt.
chance of snow. freezing spray in the afternoon. waves 6 to 9 ft
occasionally to 12 ft. 
.wednesday night...northwest gales to 35 kt diminishing to 30 kt.
freezing spray. waves 7 to 10 ft occasionally to 13 ft. 
.thursday...northwest winds to 30 kt becoming west. freezing
spray in the morning. waves 4 to 7 ft occasionally to 9 ft
subsiding to 4 to 6 ft occasionally to 8 ft. 
.thursday night...west winds to 30 kt. waves 4 to 6 ft
occasionally to 8 ft. 
.friday...northwest winds 15 to 25 kt. waves 3 to 5 ft. 
.saturday...northwest winds 10 to 20 kt. waves 1 to 3 ft.  

$$

fzus63 kmkx 300921 aaa
glflm 
expires:202512301615;;486936

open lake forecast for lake michigan...updated
national weather service milwaukee/sullivan wi
321 am cst tue dec 30 2025

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...

winds have fallen below gales, but gusty northwesterly winds and
moderate freezing spray concerns continue this morning as lake
michigan sits between strong low pressure around 28.9 inches
meandering over quebec and a high pressure around 30.6 inches 
moving south across the plains. will then see the gusty winds 
shift more westerly this afternoon as an area of weak low pressure
around 29.9 inches and cold front slides down across the region. 
northwesterly winds return overnight behind the frontal passage 
with a few gale force gusts possible across the far northern 
portions of the lake. will see another cold front move down across
the lake wednesday with northwesterly winds prevailing through 
the end of the week. behind the front, colder arctic air will 
settle over the region as high pressure around 30.3 inches builds 
down across the upper great lakes region wednesday night into 
thursday. could see additional freezing spray concern through the 
end of the week given breezy winds and the colder airmass.


lmz080-669-671-673-675-777-779-870-872-874-876-878-301615-
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-
321 am cst tue dec 30 2025

sheboygan wi to pentwater mi south...

.today...northwest winds 15 to 25 kt becoming west. freezing
spray this morning. slight chance of snow this morning, then
chance of snow this afternoon. waves 8 to 11 ft occasionally to
14 ft subsiding to 7 to 10 ft occasionally to 13 ft. 
.tonight...west winds 15 to 25 kt becoming northwest. snow likely
in the evening, then slight chance of snow overnight. waves 6 to
9 ft occasionally to 12 ft. 
.wednesday...northwest winds to 30 kt. chance of snow in the
morning, then snow likely in the afternoon. freezing spray in the
afternoon. waves 6 to 9 ft occasionally to 12 ft building to 8 to
11 ft occasionally to 14 ft. 
.wednesday night...northwest winds to 30 kt. chance of snow in
the evening. freezing spray. waves 8 to 11 ft occasionally to
14 ft. 
.thursday...northwest winds 15 to 25 kt becoming west. freezing
spray in the morning. waves 5 to 8 ft occasionally to 10 ft
subsiding to 4 to 7 ft occasionally to 9 ft. 
.thursday night...west winds 15 to 25 kt. waves 4 to 6 ft
occasionally to 8 ft. 
.friday...northwest winds 10 to 20 kt. waves 4 to 6 ft
occasionally to 8 ft. 
.saturday...northwest winds 10 to 15 kt. waves 2 to 4 ft.  

$$