fzus63 kmkx 042143 aaa
glflm 
expires:202605050315;;019827

open lake forecast for lake michigan...updated
national weather service milwaukee/sullivan wi
443 pm cdt mon may 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...

gusty southwesterly winds will linger until early this evening, 
ahead of an approaching cold front. the cold front is in 
association with low pressure of 28.9 inches over north central 
ontario, which will track northeast toward james bay through 
tuesday. 

as this occurs, the cold front will sink southeast over lake 
michigan through this evening and clear the lake tonight, shifting
winds to northwesterly. scattered storms may occur along the 
front, supportive of gusty winds.

west to northwest winds then persist through the first half of 
tuesday. winds will become light and variable tuesday afternoon 
into wednesday morning, as a weak surface ridge passes over the 
lake. similar winds are expected wednesday, before southerly 
return thursday.


lmz261-362-364-366-563-565-567-868-050315-
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-
443 pm cdt mon may 4 2026

sheboygan wi to pentwater mi north...

.tonight...southwest to west winds 15 to 25 kt early, veering 
northwest and diminishing to 10 to 20 kt. slight chance of rain 
showers this evening. waves 4 to 7 ft occasionally to 9 ft 
subsiding to 2 to 4 ft. 
.tuesday...west winds 10 to 20 kt becoming southwest 10 to 15 kt.
waves 1 to 3 ft. 
.tuesday night...southwest winds 10 to 15 kt veering to north
5 to 10 kt. waves 1 to 2 ft. 
.wednesday...northwest winds 10 to 15 kt backing to southwest
10 to 20 kt. waves 1 to 2 ft. 
.wednesday night...southwest winds 10 to 15 kt veering to north.
waves 1 to 2 ft. 
.thursday...southwest winds 5 to 10 kt increasing to 10 to 15 kt.
waves 1 to 2 ft. 
.thursday night...southwest winds 10 to 15 kt. waves 1 to 3 ft. 
.friday...southwest winds 10 to 15 kt. waves 1 to 3 ft. 
.saturday...west winds 10 to 15 kt becoming southwest. waves 2 to
4 ft.  

$$

fzus63 kmkx 042143 aaa
glflm 
expires:202605050315;;019828

open lake forecast for lake michigan...updated
national weather service milwaukee/sullivan wi
443 pm cdt mon may 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...

gusty southwesterly winds will linger until early this evening, 
ahead of an approaching cold front. the cold front is in 
association with low pressure of 28.9 inches over north central 
ontario, which will track northeast toward james bay through 
tuesday. 

as this occurs, the cold front will sink southeast over lake 
michigan through this evening and clear the lake tonight, shifting
winds to northwesterly. scattered storms may occur along the 
front, supportive of gusty winds.

west to northwest winds then persist through the first half of 
tuesday. winds will become light and variable tuesday afternoon 
into wednesday morning, as a weak surface ridge passes over the 
lake. similar winds are expected wednesday, before southerly 
return thursday.


lmz080-669-671-673-675-777-779-870-872-874-876-878-050315-
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-
443 pm cdt mon may 4 2026

sheboygan wi to pentwater mi south...

.tonight...southwest winds 15 to 25 kt veering to northwest 10 to
20 kt. chance of rain showers and slight chance of thunderstorms
this evening, then chance of rain showers overnight. waves 4 to
6 ft occasionally to 8 ft subsiding to 2 to 4 ft. 
.tuesday...northwest winds 10 to 15 kt veering to east. waves
1 to 3 ft subsiding to 1 to 2 ft. 
.tuesday night...south winds 5 to 10 kt veering to northwest.
waves 1 to 2 ft. 
.wednesday...northwest winds 10 to 15 kt becoming north. waves
1 to 2 ft. 
.wednesday night...south winds 5 to 10 kt veering to west. waves
1 to 2 ft. 
.thursday...west winds 5 to 10 kt becoming southwest 10 to 15 kt.
waves 1 to 2 ft. 
.thursday night...south winds 10 to 15 kt becoming southwest.
waves 1 to 3 ft. 
.friday...southwest winds 10 to 15 kt. waves 1 to 3 ft. 
.saturday...west winds 10 to 20 kt becoming southwest 10 to
15 kt. waves 2 to 4 ft.  

$$

fzus63 kmkx 041934
glflm 
expires:202605050315;;015018

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
234 pm cdt mon may 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...

gusty southerly to southwesterly winds will persist this
afternoon ahead of an approaching cold front. a gale warning
remains in effect over the northern third of the lake through 4pm
cdt this afternoon. 

this cold front is in association with low pressure of 28.9 
inches over north central ontario, which will track northeast 
toward james bay through tuesday. as this occurs, the cold front 
will sink southeast over lake michigan through this afternoon and 
clear the lake tonight, ending gales and changing winds to
northwesterly. some scattered storms may occur along the front,
supportive of gusty winds.

west to northwest winds then persist through tonight through the
first half of tuesday, with winds becoming light and variable
tuesday afternoon into wednesday morning as a weak surface ridge
passes over the lake. similar winds are expected wednesday, before
southerly return thursday.


lmz366-565-567-868-050315-
lake michigan from point betsie to manistee mi 5 nm offshore to
mid lake-
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-
234 pm cdt mon may 4 2026

sturgeon bay wi to point betsie mi south to sheboygan wi to
pentwater mi...

.tonight...west winds 15 to 25 kt becoming northwest late this
evening, then becoming north 10 to 20 kt after midnight becoming
northwest 10 to 15 kt late. chance of sprinkles this evening.
waves 4 to 7 ft occasionally to 9 ft subsiding to 2 to 4 ft. 
.tuesday...northwest winds 10 to 15 kt backing to southwest.
waves 1 to 3 ft. 
.tuesday night...southwest winds 5 to 10 kt veering to north.
waves 1 to 2 ft. 
.wednesday...north winds 10 to 15 kt backing to southwest. waves
1 to 2 ft. 
.wednesday night...southwest winds 5 to 10 kt veering to
northwest. waves 1 ft or less. 
.thursday...west winds 5 to 10 kt becoming southwest 10 to 15 kt.
waves 1 to 2 ft. 
.thursday night...southwest winds 10 to 15 kt. waves 1 to 3 ft. 
.friday...southwest winds 10 to 15 kt becoming south. waves 1 to
3 ft. 
.saturday...west winds 10 to 15 kt becoming south. waves 2 to
4 ft.  

$$