fzus63 kmkx 271941
glflm 
expires:202607280330;;710609

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
241 pm cdt mon jul 27 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...

severe storms will end later this afternoon over far southern lake
michigan. otherwise low pressure around 29.5 inches over central
wisconsin will move to the lower great lakes for tuesday morning.
its cold front will move north to south across lake michigan
during the evening. northerly winds are expected to gust around 
30 kt over central and southern lake michigan tonight through
tuesday. much lighter northerly winds are then expected late
tuesday night into wednesday as high pressure around 30.0 inches 
builds into the northern great lakes. the high will maintain light
winds for thursday and friday as well. 


lmz563-565-567-280330-
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-
241 pm cdt mon jul 27 2026

rock island passage to charlevoix mi south to sheboygan wi to
pentwater mi...

...severe thunderstorm watch 519 in effect until 3 pm cdt this
afternoon...

.tonight...north winds 10 to 20 kt increasing to 30 kt. waves
4 to 7 ft occasionally to 9 ft. 
.tuesday...north winds to 30 kt diminishing to 15 to 25 kt. waves
4 to 7 ft occasionally to 9 ft. 
.tuesday night...north winds 15 to 25 kt diminishing to 10 to
15 kt. waves 3 to 5 ft subsiding to 1 to 3 ft. 
.wednesday...north winds 10 to 15 kt becoming northeast. waves
1 to 2 ft. 
.wednesday night...southeast winds 5 to 10 kt becoming south.
waves 1 ft or less. 
.thursday...southwest winds 5 to 10 kt becoming south 10 to
15 kt. waves 1 ft or less. 
.thursday night...south winds 10 to 15 kt becoming southwest 5 to
10 kt. waves 1 to 2 ft. 
.friday...southwest winds 5 to 10 kt becoming south. chance of
showers. waves 1 to 2 ft. 
.saturday...north winds 5 to 10 kt becoming northeast 10 to
15 kt. chance of showers. waves 1 to 2 ft.  

$$

fzus63 kmkx 271941
glflm 
expires:202607280330;;710610

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
241 pm cdt mon jul 27 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...

severe storms will end later this afternoon over far southern lake
michigan. otherwise low pressure around 29.5 inches over central
wisconsin will move to the lower great lakes for tuesday morning.
its cold front will move north to south across lake michigan
during the evening. northerly winds are expected to gust around 
30 kt over central and southern lake michigan tonight through
tuesday. much lighter northerly winds are then expected late
tuesday night into wednesday as high pressure around 30.0 inches 
builds into the northern great lakes. the high will maintain light
winds for thursday and friday as well. 


lmz671-673-675-280330-
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-
241 pm cdt mon jul 27 2026

port washington wi to whitehall mi south to winthrop harbor il to
south haven mi...

...severe thunderstorm watch 520 in effect until 7 pm cdt this
evening...

.tonight...southwest winds 15 to 25 kt veering to northwest to
30 kt late this evening, then becoming north after midnight
becoming north to 30 kt late. scattered showers with isolated
thunderstorms this evening. waves 4 to 6 ft occasionally to 8 ft 
building to 6 to 9 ft occasionally to 12 ft.
.tuesday...north winds to 30 kt. waves 6 to 9 ft occasionally to
12 ft. 
.tuesday night...north winds to 30 kt diminishing to 10 to 15 kt.
waves 6 to 9 ft occasionally to 12 ft subsiding to 3 to 5 ft. 
.wednesday...north winds 10 to 15 kt. waves 2 to 4 ft. 
.wednesday night...north winds 10 to 15 kt diminishing to 5 to
10 kt. waves 1 to 3 ft. 
.thursday...southwest winds 5 to 10 kt becoming south. waves 1 to
2 ft. 
.thursday night...south winds 10 to 15 kt becoming southwest 5 to
10 kt. waves 1 to 2 ft. 
.friday...southwest winds 5 to 10 kt becoming south. waves 1 to
2 ft. 
.saturday...northwest winds 5 to 10 kt becoming north 10 to
15 kt. chance of showers. waves 1 to 2 ft.  

$$

fzus63 kmkx 271941
glflm 
expires:202607280330;;710608

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
241 pm cdt mon jul 27 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...

severe storms will end later this afternoon over far southern lake
michigan. otherwise low pressure around 29.5 inches over central
wisconsin will move to the lower great lakes for tuesday morning.
its cold front will move north to south across lake michigan
during the evening. northerly winds are expected to gust around 
30 kt over central and southern lake michigan tonight through
tuesday. much lighter northerly winds are then expected late
tuesday night into wednesday as high pressure around 30.0 inches 
builds into the northern great lakes. the high will maintain light
winds for thursday and friday as well. 


lmz261-362-364-366-868-280330-
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 pentwater to manistee mi 5 nm offshore to mid
lake-
241 pm cdt mon jul 27 2026

rock island passage to charlevoix mi north...

.tonight...north winds 10 to 20 kt increasing to 30 kt. isolated
showers and thunderstorms this evening. waves 4 to 7 ft
occasionally to 9 ft. 
.tuesday...north winds to 30 kt. waves 4 to 7 ft occasionally to
9 ft. 
.tuesday night...north winds 15 to 25 kt diminishing to 10 to
15 kt. waves 3 to 5 ft subsiding to 1 to 3 ft. 
.wednesday...north winds 10 to 20 kt becoming northwest 15 to
25 kt. waves 1 to 3 ft. 
.wednesday night...southwest winds 10 to 20 kt becoming south
5 to 10 kt overnight. waves 1 to 3 ft subsiding to 1 ft or less. 
.thursday...south winds 10 to 15 kt becoming southwest. waves
1 ft or less. 
.thursday night...south winds 10 to 15 kt becoming southwest 5 to
10 kt. waves 1 to 2 ft. 
.friday...southwest winds 10 to 15 kt increasing to 10 to 20 kt.
chance of showers. waves 1 to 2 ft. 
.saturday...north winds 10 to 15 kt increasing to 10 to 20 kt.
chance of showers. waves 1 to 2 ft.  

$$

fzus63 kmkx 271941
glflm 
expires:202607280330;;710611

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
241 pm cdt mon jul 27 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...

severe storms will end later this afternoon over far southern lake
michigan. otherwise low pressure around 29.5 inches over central
wisconsin will move to the lower great lakes for tuesday morning.
its cold front will move north to south across lake michigan
during the evening. northerly winds are expected to gust around 
30 kt over central and southern lake michigan tonight through
tuesday. much lighter northerly winds are then expected late
tuesday night into wednesday as high pressure around 30.0 inches 
builds into the northern great lakes. the high will maintain light
winds for thursday and friday as well. 


lmz080-669-777-779-870-872-874-876-878-280330-
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 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-
241 pm cdt mon jul 27 2026

sheboygan wi to pentwater mi south...

.tonight...southwest winds 15 to 25 kt veering to north to 30 kt.
scattered showers and thunderstorms this evening. waves 4 to 6 ft
occasionally to 8 ft building to 6 to 9 ft occasionally to 12 ft.
.tuesday...north winds to 30 kt. waves 6 to 9 ft occasionally to
12 ft. 
.tuesday night...north winds to 30 kt diminishing to 10 to 15 kt.
waves 7 to 10 ft occasionally to 13 ft subsiding to 3 to 5 ft. 
.wednesday...north winds 10 to 20 kt increasing to 15 to 25 kt.
waves 2 to 4 ft. 
.wednesday night...north winds 10 to 20 kt becoming northeast
5 to 10 kt overnight. waves 2 to 4 ft subsiding to 1 to 3 ft. 
.thursday...south winds 5 to 10 kt increasing to 10 to 15 kt.
waves 1 to 2 ft. 
.thursday night...south winds 10 to 15 kt becoming southwest 5 to
10 kt. waves 1 to 2 ft. 
.friday...southwest winds 10 to 15 kt. waves 1 to 2 ft. 
.saturday...northwest winds 10 to 15 kt increasing to 10 to
20 kt. chance of showers. waves 1 to 2 ft.  

$$

fzus63 kmkx 271654
glflm 
expires:202607280300;;701384

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
1153 am cdt mon jul 27 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...

severe storms are expected this morning and afternoon. very 
strong winds, and hail are possible with these storms. storms will
move north to south across the lake ahead of a cold front that
will progress north to south this afternoon hours. northerly 
winds are expected behind the front, with gusts around 30 kt 
expected. gusts to gale force cannot be ruled out as low pressure 
deepens to 29.5 inches over the eastern great lakes tuesday. winds
will remain northerly through wednesday as high pressure around 
30.0 inches builds into the northern great lakes, then will become
lighter and more variable into thursday and friday as high 
pressure builds overhead.


lmz868-280300-
lake michigan from pentwater to manistee mi 5 nm offshore to mid
lake-
1154 am cdt mon jul 27 2026

wilmette harbor il to st. joseph mi south to rock island passage
to charlevoix mi...

...severe thunderstorm watch 520 in effect until 7 pm cdt this
evening...

.tonight...north winds 10 to 20 kt increasing to 30 kt. patchy
fog in the evening. chance of showers and thunderstorms in the
evening. waves 2 to 4 ft building to 4 to 7 ft occasionally to
9 ft. 
.tuesday...north winds to 30 kt. waves 4 to 7 ft occasionally to
9 ft. 
.tuesday night...north winds to 30 kt diminishing to 10 to 20 kt
overnight. waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to
4 ft. 
.wednesday...north winds 10 to 20 kt becoming northwest 15 to
25 kt. waves 1 to 3 ft. 
.wednesday night...south winds 10 to 20 kt diminishing to 5 to
10 kt. waves 1 to 3 ft subsiding to 1 ft or less. 
.thursday...south winds 10 to 15 kt. waves 1 ft or less. 
.friday...southwest winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 2 ft.  

$$

fzus63 kmkx 271654
glflm 
expires:202607280300;;701385

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
1153 am cdt mon jul 27 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...

severe storms are expected this morning and afternoon. very 
strong winds, and hail are possible with these storms. storms will
move north to south across the lake ahead of a cold front that
will progress north to south this afternoon hours. northerly 
winds are expected behind the front, with gusts around 30 kt 
expected. gusts to gale force cannot be ruled out as low pressure 
deepens to 29.5 inches over the eastern great lakes tuesday. winds
will remain northerly through wednesday as high pressure around 
30.0 inches builds into the northern great lakes, then will become
lighter and more variable into thursday and friday as high 
pressure builds overhead.


lmz080-669-671-673-675-777-779-870-872-874-876-878-280300-
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-
1154 am cdt mon jul 27 2026

sheboygan wi to pentwater mi south...

...severe thunderstorm watch 520 in effect until 7 pm cdt this
evening...

.tonight...southwest winds 15 to 25 kt veering to north to 30 kt.
chance of showers and slight chance of thunderstorms in the
evening. waves 3 to 5 ft building to 5 to 8 ft occasionally to
10 ft. 
.tuesday...north winds to 30 kt. waves 7 to 10 ft occasionally to
13 ft. 
.tuesday night...north gales to 35 kt diminishing to 15 to 25 kt
overnight. waves 7 to 10 ft occasionally to 13 ft. 
.wednesday...north winds 10 to 20 kt increasing to 15 to 25 kt.
waves 3 to 5 ft. 
.wednesday night...north winds 10 to 20 kt becoming northeast
5 to 10 kt. waves 2 to 4 ft subsiding to 1 to 3 ft. 
.thursday...south winds 5 to 10 kt increasing to 10 to 15 kt.
waves 1 to 2 ft. 
.friday...southwest winds 10 to 15 kt becoming south. chance of
showers. waves 1 to 2 ft.  

$$

fzus63 kmkx 271654
glflm 
expires:202607280300;;701382

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
1153 am cdt mon jul 27 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...

severe storms are expected this morning and afternoon. very 
strong winds, and hail are possible with these storms. storms will
move north to south across the lake ahead of a cold front that
will progress north to south this afternoon hours. northerly 
winds are expected behind the front, with gusts around 30 kt 
expected. gusts to gale force cannot be ruled out as low pressure 
deepens to 29.5 inches over the eastern great lakes tuesday. winds
will remain northerly through wednesday as high pressure around 
30.0 inches builds into the northern great lakes, then will become
lighter and more variable into thursday and friday as high 
pressure builds overhead.


lmz261-362-364-366-280300-
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-
1154 am cdt mon jul 27 2026

rock island passage to charlevoix mi north...

.tonight...north winds 10 to 20 kt increasing to 30 kt. patchy
fog in the evening. chance of showers and thunderstorms in the
evening. waves 2 to 4 ft building to 4 to 7 ft occasionally to
9 ft. 
.tuesday...north winds to 30 kt. waves 4 to 7 ft occasionally to
9 ft. 
.tuesday night...north winds to 30 kt diminishing to 10 to 20 kt
overnight. waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to
4 ft. 
.wednesday...north winds 10 to 20 kt becoming northwest 15 to
25 kt. waves 1 to 3 ft. 
.wednesday night...south winds 10 to 20 kt diminishing to 5 to
10 kt. waves 1 to 3 ft subsiding to 1 ft or less. 
.thursday...south winds 10 to 15 kt. waves 1 ft or less. 
.friday...southwest winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 2 ft.  

$$