fzus63 kmkx 041953
glflm 
expires:202607050315;;414149

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
253 pm cdt sat jul 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...

high pressure around 30.1 inches over the upper great lakes 
will remain in place through monday. weak low pressure around 
29.9 inches will slowly move east across northern illinois into
indiana during this time. scattered showers and some 
thunderstorms are expected over mainly the south half of lake
michigan through this evening. additional showers are possible
sunday. areas of dense fog developed over lake michigan, mainly
in central portions, and is expected to expand southward
overnight. the marine dense fog advisory may need to be
expanded. there is an expectation that the fog would diminish 
by mid sunday morning with increasing northeast winds.


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-
253 pm cdt sat jul 4 2026

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

...dense fog advisory in effect until 10 am cdt sunday...

.tonight...north winds 10 to 15 kt becoming northeast 5 to 10 kt.
areas of dense fog. waves 1 to 3 ft. 
.sunday...northeast winds 10 to 15 kt becoming north 10 to 20 kt.
patchy dense fog in the morning. waves 2 to 4 ft. 
.sunday night...northeast winds 10 to 20 kt becoming east 5 to
10 kt after midnight, then becoming northeast late. waves 2 to
4 ft subsiding to 1 to 3 ft. 
.monday...northeast winds 5 to 10 kt becoming north 10 to 20 kt
in the afternoon. waves 1 to 2 ft building to 1 to 3 ft. 
.monday night...north winds 10 to 20 kt diminishing to 5 to 10 kt
overnight. waves 1 to 3 ft subsiding to 1 to 2 ft. 
.tuesday...north winds 5 to 10 kt backing to southwest. waves
1 ft or less. 
.tuesday night...southwest winds 5 to 10 kt. waves 1 ft or less. 
.wednesday...southwest winds 10 to 15 kt becoming south 10 to
20 kt. waves 1 to 2 ft building to 1 to 3 ft. 
.thursday...west winds 10 to 20 kt becoming north 15 to 25 kt.
chance of showers. waves 2 to 4 ft.  

$$

fzus63 kmkx 041953
glflm 
expires:202607050315;;414150

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
253 pm cdt sat jul 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...

high pressure around 30.1 inches over the upper great lakes 
will remain in place through monday. weak low pressure around 
29.9 inches will slowly move east across northern illinois into
indiana during this time. scattered showers and some 
thunderstorms are expected over mainly the south half of lake
michigan through this evening. additional showers are possible
sunday. areas of dense fog developed over lake michigan, mainly
in central portions, and is expected to expand southward
overnight. the marine dense fog advisory may need to be
expanded. there is an expectation that the fog would diminish 
by mid sunday morning with increasing northeast winds.


lmz669-671-673-675-870-872-874-876-050315-
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 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-
253 pm cdt sat jul 4 2026

sheboygan wi to pentwater mi south to winthrop harbor il to south
haven mi...

...dense fog advisory in effect until 10 am cdt sunday...

.tonight...north winds 10 to 15 kt becoming northeast. areas of
dense fog. slight chance of showers. waves 1 to 3 ft. 
.sunday...northeast winds 10 to 15 kt becoming north 10 to 20 kt.
patchy dense fog in the morning. waves 2 to 4 ft. 
.sunday night...north winds 10 to 20 kt becoming northeast 10 to
15 kt. waves 2 to 4 ft. 
.monday...northeast winds 10 to 15 kt becoming north 10 to 20 kt.
waves 2 to 4 ft. 
.monday night...north winds 10 to 20 kt becoming northeast 5 to
10 kt overnight. waves 2 to 4 ft. 
.tuesday...north winds 5 to 10 kt increasing to 10 to 15 kt.
waves 1 to 2 ft. 
.tuesday night...southwest winds 10 to 15 kt diminishing to 5 to
10 kt. waves 1 ft or less. 
.wednesday...southwest winds 10 to 15 kt becoming south 10 to
20 kt. waves 1 to 3 ft. 
.thursday...southwest winds 10 to 20 kt becoming west 15 to
25 kt. chance of showers. waves 2 to 4 ft.  

$$

fzus63 kmkx 041953
glflm 
expires:202607050315;;414151

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
253 pm cdt sat jul 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...

high pressure around 30.1 inches over the upper great lakes 
will remain in place through monday. weak low pressure around 
29.9 inches will slowly move east across northern illinois into
indiana during this time. scattered showers and some 
thunderstorms are expected over mainly the south half of lake
michigan through this evening. additional showers are possible
sunday. areas of dense fog developed over lake michigan, mainly
in central portions, and is expected to expand southward
overnight. the marine dense fog advisory may need to be
expanded. there is an expectation that the fog would diminish 
by mid sunday morning with increasing northeast winds.


lmz080-777-779-878-050315-
lake michigan from michigan city in to st. joseph mi 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 st. joseph to south haven mi 5 nm offshore to
mid lake-
253 pm cdt sat jul 4 2026

winthrop harbor il to south haven mi south...

.tonight...north winds 10 to 15 kt diminishing to 5 to 10 kt.
patchy fog. slight chance of showers. waves 1 to 2 ft. 
.sunday...north winds 5 to 10 kt increasing to 10 to 20 kt.
patchy fog in the morning. waves 1 to 3 ft. 
.sunday night...north winds 10 to 20 kt becoming northeast 10 to
15 kt. waves 2 to 4 ft. 
.monday...northeast winds 10 to 15 kt becoming north 10 to 20 kt.
waves 1 to 3 ft. 
.monday night...north winds 10 to 15 kt becoming northeast 5 to
10 kt. waves 1 to 3 ft. 
.tuesday...north winds 5 to 10 kt increasing to 10 to 15 kt.
waves 1 to 2 ft. 
.tuesday night...northeast winds 5 to 10 kt veering to south.
waves 1 ft or less. 
.wednesday...southwest winds 5 to 10 kt becoming south. waves
nearly calm. 
.thursday...southwest winds 10 to 20 kt. chance of showers. waves
1 to 2 ft.  

$$