fzus63 kmkx 171510
glflm 
expires:202512172215;;742758

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
910 am cst wed dec 17 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 west to northwest winds will subside through this morning,
with light and variable winds this afternoon and building south 
winds after dark this evening.

low pressure around 29.1 inches will track eastward along the 
canadian border wednesday night into thursday, bringing southerly 
gales wednesday night into thursday morning. a lull in the gales
may occur thursday afternoon into thursday evening as low 
pressure crosses the upper peninsula of michigan, though it should
still be gusty. winds turn west and accelerate back to gale force
behind the cold front later thursday evening, then eventually 
northwest thursday night. a gale warning is in effect for all open
waters of lake michigan late this evening through early friday 
morning.

moderate freezing spray is expected to accompany the gales late 
thursday night into friday morning as a bitter cold airmass 
briefly enters our region. 

friday night, another low pressure system swings through southern
canada, bringing gusty south-southwest winds once again. gales are
possible, but confidence is lower with timing and intensity at
this time.


lmz261-362-364-366-563-565-567-868-172215-
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-
910 am cst wed dec 17 2025

sheboygan wi to pentwater mi north...

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

.rest of today...northwest winds 15 to 25 kt becoming west 10 to
15 kt early this afternoon, then becoming southwest 10 to 20 kt
late. waves 4 to 6 ft occasionally to 8 ft subsiding to 1 to
3 ft. 
.tonight...south winds 15 to 25 kt increasing to gales to 40 kt.
chance of sprinkles and slight chance of rain overnight. waves
3 to 5 ft building to 12 to 16 ft occasionally to 21 ft. 
.thursday...south gales to 40 kt becoming southwest to 30 kt.
rain in the morning, then chance of rain in the afternoon. waves
12 to 16 ft occasionally to 21 ft subsiding to 8 to 12 ft
occasionally to 16 ft. 
.thursday night...west gales to 35 kt becoming northwest gales to
40 kt. chance of snow. freezing spray overnight. waves 10 to
14 ft occasionally to 18 ft. 
.friday...northwest gales to 40 kt diminishing to 30 kt in the
afternoon. freezing spray in the morning. waves 10 to 14 ft
occasionally to 18 ft subsiding to 6 to 9 ft occasionally to
12 ft. 
.friday night...southwest winds to 30 kt becoming south. chance
of snow showers. waves 4 to 6 ft occasionally to 8 ft building to
8 to 11 ft occasionally to 14 ft. 
.saturday...southwest winds to 30 kt becoming west. chance of
snow showers. waves 8 to 11 ft occasionally to 14 ft subsiding to
7 to 10 ft occasionally to 13 ft. 
.sunday...northwest winds to 30 kt diminishing to 10 to 20 kt.
waves 6 to 9 ft occasionally to 12 ft subsiding to 4 to 6 ft
occasionally to 8 ft.  

$$

fzus63 kmkx 171510
glflm 
expires:202512172215;;742759

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
910 am cst wed dec 17 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 west to northwest winds will subside through this morning,
with light and variable winds this afternoon and building south 
winds after dark this evening.

low pressure around 29.1 inches will track eastward along the 
canadian border wednesday night into thursday, bringing southerly 
gales wednesday night into thursday morning. a lull in the gales
may occur thursday afternoon into thursday evening as low 
pressure crosses the upper peninsula of michigan, though it should
still be gusty. winds turn west and accelerate back to gale force
behind the cold front later thursday evening, then eventually 
northwest thursday night. a gale warning is in effect for all open
waters of lake michigan late this evening through early friday 
morning.

moderate freezing spray is expected to accompany the gales late 
thursday night into friday morning as a bitter cold airmass 
briefly enters our region. 

friday night, another low pressure system swings through southern
canada, bringing gusty south-southwest winds once again. gales are
possible, but confidence is lower with timing and intensity at
this time.


lmz080-669-671-673-675-777-779-870-872-874-876-878-172215-
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-
910 am cst wed dec 17 2025

sheboygan wi to pentwater mi south...

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

.rest of today...northwest winds 10 to 20 kt backing to south.
waves 4 to 7 ft occasionally to 9 ft subsiding to 2 to 4 ft. 
.tonight...south winds 15 to 25 kt increasing to gales to 35 kt.
chance of rain overnight. waves 3 to 5 ft building to 10 to 14 ft
occasionally to 18 ft. 
.thursday...south gales to 35 kt becoming west to 30 kt. rain in
the morning, then chance of rain in the afternoon. waves 10 to
14 ft occasionally to 18 ft subsiding to 8 to 12 ft occasionally
to 16 ft. 
.thursday night...west gales to 40 kt. chance of snow. freezing
spray overnight. waves 12 to 16 ft occasionally to 21 ft. 
.friday...northwest gales to 40 kt becoming west 15 to 25 kt in
the afternoon. freezing spray in the morning. waves 12 to 16 ft
occasionally to 21 ft subsiding to 8 to 11 ft occasionally to
14 ft. 
.friday night...southwest winds to 30 kt becoming south. waves
4 to 7 ft occasionally to 9 ft building to 8 to 11 ft
occasionally to 14 ft. 
.saturday...south winds to 30 kt becoming west. waves 8 to 12 ft
occasionally to 16 ft subsiding to 7 to 10 ft occasionally to
13 ft. 
.sunday...northwest winds 15 to 25 kt diminishing to 10 to 20 kt.
waves 8 to 11 ft occasionally to 14 ft subsiding to 4 to 7 ft
occasionally to 9 ft.  

$$