fzus63 kmkx 050304
glflm 
expires:202603051030;;642563

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
904 pm cst wed mar 4 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...

easterly winds will continue through tonight and through much of 
thursday as weak low pressure passes across the northern ohio 
river valley. rain and a few thunderstorms will be possible across
the southern half of the lake tonight into thursday morning, 
while marine dense fog with visibilities of 1 nm or less continues
across southwestern portions of the open waters through at least 
thursday and even into thursday night.

low pressure around 29.5 inches will develop in the central 
plains thursday night, and track toward the upper mississippi 
river valley by friday evening. this low will move near or just 
north of lake michigan later friday night into saturday morning, 
quickly moving into quebec by saturday evening. 

as the low passes to the north, breezy southerly winds will 
develop for friday afternoon and night, then shifting northwest 
on saturday with the passage of the cold front. widespread rain 
and embedded thunderstorms will accompany the approaching and 
passing low friday into friday night.


lmz671-673-675-777-779-051030-
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-
904 pm cst wed mar 4 2026

port washington wi to whitehall mi south...

...dense fog advisory in effect until 6 am cst friday...

.rest of tonight...east winds 5 to 10 kt becoming northeast 10 to
15 kt. widespread dense fog. chance of rain through early
evening, then slight chance of rain overnight. waves 1 to 2 ft. 
.thursday...northeast winds 10 to 15 kt. patchy fog in the
morning. rain likely in the morning, then chance of rain in the
afternoon. waves 1 to 3 ft. 
.thursday night...northeast winds 10 to 15 kt becoming southeast.
waves 1 to 3 ft. 
.friday...southeast winds 10 to 20 kt becoming south 15 to 25 kt.
rain likely in the morning, then rain in the afternoon. waves
2 to 4 ft building to 4 to 6 ft occasionally to 8 ft.
.friday night...south winds 15 to 25 kt becoming southwest. rain
likely in the evening, then rain with a chance of thunderstorms
overnight. waves 5 to 8 ft occasionally to 10 ft. 
.saturday...west winds 15 to 25 kt becoming northwest 10 to
20 kt. chance of rain in the morning. waves 5 to 8 ft
occasionally to 10 ft subsiding to 4 to 6 ft occasionally to
8 ft. 
.saturday night...west winds 10 to 20 kt becoming southwest 15 to
25 kt. waves 1 to 3 ft building to 4 to 6 ft occasionally to
8 ft. 
.sunday...southwest winds to 30 kt diminishing to 15 to 25 kt.
waves 5 to 8 ft occasionally to 10 ft. 
.monday...southwest winds 15 to 25 kt. waves 4 to 7 ft
occasionally to 9 ft.  

$$

fzus63 kmkx 050304
glflm 
expires:202603051030;;642562

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
904 pm cst wed mar 4 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...

easterly winds will continue through tonight and through much of 
thursday as weak low pressure passes across the northern ohio 
river valley. rain and a few thunderstorms will be possible across
the southern half of the lake tonight into thursday morning, 
while marine dense fog with visibilities of 1 nm or less continues
across southwestern portions of the open waters through at least 
thursday and even into thursday night.

low pressure around 29.5 inches will develop in the central 
plains thursday night, and track toward the upper mississippi 
river valley by friday evening. this low will move near or just 
north of lake michigan later friday night into saturday morning, 
quickly moving into quebec by saturday evening. 

as the low passes to the north, breezy southerly winds will 
develop for friday afternoon and night, then shifting northwest 
on saturday with the passage of the cold front. widespread rain 
and embedded thunderstorms will accompany the approaching and 
passing low friday into friday night.


lmz261-362-364-366-563-565-567-868-051030-
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-
904 pm cst wed mar 4 2026

sheboygan wi to pentwater mi north...

.rest of tonight...southeast winds 5 to 10 kt becoming east late
this evening, then increasing to 10 to 15 kt after midnight
increasing to 10 to 20 kt late. waves 1 to 2 ft. 
.thursday...east winds 15 to 25 kt diminishing to 10 to 20 kt.
patchy fog in the morning. slight chance of rain in the
afternoon. waves 2 to 4 ft. 
.thursday night...east winds 15 to 25 kt becoming southeast 10 to
20 kt. waves 2 to 4 ft subsiding to 1 to 2 ft. 
.friday...southeast winds 10 to 20 kt increasing to 15 to 25 kt.
chance of rain in the morning, then rain in the afternoon. waves
2 to 4 ft building to 4 to 6 ft occasionally to 8 ft. 
.friday night...south winds to 30 kt becoming southwest. rain
with a chance of thunderstorms in the evening, then rain
overnight. waves 4 to 7 ft occasionally to 9 ft building to 5 to
8 ft occasionally to 10 ft. 
.saturday...west winds to 30 kt becoming northwest 15 to 25 kt.
chance of rain in the morning. waves 5 to 8 ft occasionally to
10 ft subsiding to 4 to 7 ft occasionally to 9 ft. 
.saturday night...west winds 10 to 20 kt becoming southwest to
30 kt. waves 2 to 4 ft building to 5 to 8 ft occasionally to
10 ft. 
.sunday...southwest gales to 35 kt. waves 7 to 10 ft occasionally
to 13 ft. 
.monday...southwest winds to 30 kt. waves 7 to 10 ft occasionally
to 13 ft.  

$$

fzus63 kmkx 050304
glflm 
expires:202603051030;;642564

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
904 pm cst wed mar 4 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...

easterly winds will continue through tonight and through much of 
thursday as weak low pressure passes across the northern ohio 
river valley. rain and a few thunderstorms will be possible across
the southern half of the lake tonight into thursday morning, 
while marine dense fog with visibilities of 1 nm or less continues
across southwestern portions of the open waters through at least 
thursday and even into thursday night.

low pressure around 29.5 inches will develop in the central 
plains thursday night, and track toward the upper mississippi 
river valley by friday evening. this low will move near or just 
north of lake michigan later friday night into saturday morning, 
quickly moving into quebec by saturday evening. 

as the low passes to the north, breezy southerly winds will 
develop for friday afternoon and night, then shifting northwest 
on saturday with the passage of the cold front. widespread rain 
and embedded thunderstorms will accompany the approaching and 
passing low friday into friday night.


lmz080-669-870-872-874-876-878-051030-
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 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-
904 pm cst wed mar 4 2026

sheboygan wi to pentwater mi south to port washington wi to
whitehall mi...

.rest of tonight...east winds 5 to 10 kt increasing to 10 to
15 kt. patchy fog. chance of rain through early evening, then
slight chance of rain overnight. waves 1 to 2 ft. 
.thursday...northeast winds 10 to 15 kt. patchy fog. chance of
rain. waves 1 to 3 ft. 
.thursday night...east winds 10 to 15 kt becoming southeast.
waves 1 to 2 ft. 
.friday...southeast winds 10 to 20 kt becoming south 15 to 25 kt.
chance of rain in the morning, then rain in the afternoon. waves
2 to 4 ft building to 4 to 6 ft occasionally to 8 ft. 
.friday night...south winds to 30 kt becoming southwest. rain
likely with a chance of thunderstorms in the evening, then rain
with a chance of thunderstorms overnight. waves 4 to 7 ft
occasionally to 9 ft building to 6 to 9 ft occasionally to 12 ft.
.saturday...west winds to 30 kt becoming northwest 15 to 25 kt.
chance of rain in the morning. waves 6 to 9 ft occasionally to
12 ft. 
.saturday night...west 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. 
.sunday...southwest winds to 30 kt. waves 6 to 9 ft occasionally
to 12 ft. 
.monday...southwest winds to 30 kt becoming south 15 to 25 kt.
waves 6 to 9 ft occasionally to 12 ft.  

$$