fzus63 kmkx 041443
glflm 
expires:202512042215;;994911

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
843 am cst thu dec 4 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...

breezy northwest winds will continue through the morning, 
especially across the eastern half of the lake. moderate freezing
spray will remain a concern for the next few hours across the 
eastern half of the lake as well. high pressure of 30.4 inches 
will move across iowa and then through northern illinois and 
indiana today, shifting winds to a southwesterly direction by 
tonight.

winds will increase this evening to gale force over the northern
half of the lake as an area of low pressure around 29.7 inches 
moves across southwestern ontario. a gale warning is in effect 
from late this evening through mid morning friday. freezing spray 
is also expected during this time. 

a cold front will drape across the open waters friday into friday
night, bringing lighter westerly winds. winds shift to become
northwesterly into saturday as low pressure exits to the east,
continuing through sunday before high pressure builds over the
lake sunday night into monday and brings light and variable winds.


lmz261-362-364-366-563-565-567-868-042215-
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-
843 am cst thu dec 4 2025

sheboygan wi to pentwater mi north...

...gale warning in effect from this evening through friday
morning...

.rest of today...northwest winds to 30 kt diminishing to 15 to
25 kt late this morning, then becoming west 10 to 20 kt early
this afternoon becoming southwest late. waves 4 to 7 ft
occasionally to 9 ft subsiding to 1 to 3 ft. 
.tonight...southwest winds to 30 kt increasing to gales to 40 kt.
chance of snow overnight. waves 4 to 6 ft occasionally to 8 ft
building to 10 to 14 ft occasionally to 18 ft. 
.friday...southwest gales to 40 kt diminishing to 30 kt. chance
of snow in the morning, then snow likely in the afternoon. waves
10 to 14 ft occasionally to 18 ft subsiding to 7 to 10 ft
occasionally to 13 ft. 
.friday night...southwest winds to 30 kt becoming west. snow in
the evening. waves 6 to 9 ft occasionally to 12 ft. 
.saturday...northwest winds 15 to 25 kt. waves 4 to 6 ft
occasionally to 8 ft subsiding to 3 to 5 ft. 
.saturday night...northwest winds 10 to 20 kt. waves 2 to 4 ft. 
.sunday...northwest winds 10 to 20 kt becoming north. waves 2 to
4 ft. 
.monday...southwest winds 10 to 20 kt increasing to 15 to 25 kt.
chance of snow. waves 2 to 4 ft building to 4 to 7 ft
occasionally to 9 ft.  

$$

fzus63 kmkx 041443
glflm 
expires:202512042215;;994912

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
843 am cst thu dec 4 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...

breezy northwest winds will continue through the morning, 
especially across the eastern half of the lake. moderate freezing
spray will remain a concern for the next few hours across the 
eastern half of the lake as well. high pressure of 30.4 inches 
will move across iowa and then through northern illinois and 
indiana today, shifting winds to a southwesterly direction by 
tonight.

winds will increase this evening to gale force over the northern
half of the lake as an area of low pressure around 29.7 inches 
moves across southwestern ontario. a gale warning is in effect 
from late this evening through mid morning friday. freezing spray 
is also expected during this time. 

a cold front will drape across the open waters friday into friday
night, bringing lighter westerly winds. winds shift to become
northwesterly into saturday as low pressure exits to the east,
continuing through sunday before high pressure builds over the
lake sunday night into monday and brings light and variable winds.


lmz080-669-671-673-675-777-779-870-872-874-876-878-042215-
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-
843 am cst thu dec 4 2025

sheboygan wi to pentwater mi south...

.rest of today...northwest winds 10 to 20 kt diminishing to 5 to
10 kt early this afternoon, then becoming southwest 10 to 15 kt
late. waves 5 to 8 ft occasionally to 10 ft subsiding to 2 to
4 ft. 
.tonight...southwest winds 10 to 20 kt increasing to 30 kt. waves
2 to 4 ft building to 8 to 11 ft occasionally to 14 ft. 
.friday...southwest winds to 30 kt. 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. 
.friday night...southwest winds to 30 kt becoming west 15 to
25 kt. snow in the evening. waves 7 to 10 ft occasionally to
13 ft. 
.saturday...northwest winds 15 to 25 kt diminishing to 10 to
20 kt. chance of rain and snow in the morning. waves 5 to 8 ft
occasionally to 10 ft subsiding to 4 to 6 ft occasionally to
8 ft. 
.saturday night...northwest winds 10 to 15 kt becoming north
10 to 20 kt. chance of snow. waves 3 to 5 ft. 
.sunday...north winds 10 to 20 kt. chance of snow. waves 4 to
6 ft occasionally to 8 ft. 
.monday...south winds 10 to 20 kt becoming southwest 15 to 25 kt.
waves 3 to 5 ft building to 4 to 7 ft occasionally to 9 ft.  

$$