fzus63 kmkx 050158
glflm 
expires:202608050915;;635332

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
858 pm cdt tue aug 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...

a cold front is slowly moving across the waters this evening into
wednesday morning, bringing a brief north-northwest wind shift. 
periods of showers and storms will accompany the slow-moving 
front, with severe weather appearing unlikely at this time. winds 
will trend variable wednesday evening through thursday, when 30.1 
inch high pressure is forecast to build into the western great 
lakes.

a prolonged period of south-southwest winds will become established 
across lake michigan thursday night through sunday as 30.1 inch 
high pressure lingers off the mid-atlantic coast and 29.6 inch 
low pressure stalls over the hudson bay. a slow-moving surface
front will linger across the western great lakes saturday into the
beginning of next week, bringing multiple periods of showers and
thunderstorms. some of these storms could be stronger, with
additional details clarifying through the end of this week.


lmz261-362-364-366-563-565-567-868-050915-
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-
858 pm cdt tue aug 4 2026

sheboygan wi to pentwater mi north...

.rest of tonight...southwest winds 15 to 25 kt diminishing to
10 to 20 kt late this evening, then backing to east 10 to 15 kt
after midnight becoming northeast late. showers likely with a
chance of thunderstorms through early evening, then chance of
showers and slight chance of thunderstorms overnight. patchy fog
overnight. waves 3 to 5 ft subsiding to 2 to 4 ft. 
.wednesday...northeast winds 10 to 15 kt diminishing to 5 to
10 kt. patchy fog in the morning. chance of showers and slight
chance of thunderstorms in the morning, then slight chance of
showers and thunderstorms in the afternoon. waves 1 to 3 ft
subsiding to 1 to 2 ft. 
.wednesday night...southeast winds 5 to 10 kt. waves 1 ft or
less. 
.thursday...south winds 10 to 15 kt becoming southwest. waves
1 to 2 ft. 
.thursday night...south winds 10 to 15 kt becoming southwest
10 to 20 kt. waves 1 to 2 ft. 
.friday...southwest winds 10 to 20 kt increasing to 15 to 25 kt.
waves 1 to 3 ft. 
.friday night...south winds 15 to 25 kt becoming southwest. waves
2 to 4 ft. 
.saturday...west winds 10 to 20 kt becoming southwest. waves 1 to
3 ft. 
.sunday...southwest winds 10 to 20 kt. waves 1 to 3 ft.  

$$

fzus63 kmkx 050158
glflm 
expires:202608050915;;635333

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
858 pm cdt tue aug 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...

a cold front is slowly moving across the waters this evening into
wednesday morning, bringing a brief north-northwest wind shift. 
periods of showers and storms will accompany the slow-moving 
front, with severe weather appearing unlikely at this time. winds 
will trend variable wednesday evening through thursday, when 30.1 
inch high pressure is forecast to build into the western great 
lakes.

a prolonged period of south-southwest winds will become established 
across lake michigan thursday night through sunday as 30.1 inch 
high pressure lingers off the mid-atlantic coast and 29.6 inch 
low pressure stalls over the hudson bay. a slow-moving surface
front will linger across the western great lakes saturday into the
beginning of next week, bringing multiple periods of showers and
thunderstorms. some of these storms could be stronger, with
additional details clarifying through the end of this week.


lmz080-669-671-673-675-777-779-870-872-874-876-878-050915-
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-
858 pm cdt tue aug 4 2026

sheboygan wi to pentwater mi south...

.rest of tonight...south winds 10 to 20 kt becoming southwest
10 to 15 kt. slight chance of showers and thunderstorms through
early evening, then chance of showers and slight chance of
thunderstorms overnight. waves 3 to 5 ft subsiding to 2 to 4 ft. 
.wednesday...southwest winds 10 to 15 kt diminishing to 5 to
10 kt. chance of showers and slight chance of thunderstorms in
the morning, then slight chance of showers and thunderstorms in
the afternoon. waves 1 to 3 ft. 
.wednesday night...west winds 5 to 10 kt becoming north. chance
of showers and thunderstorms. waves 1 to 2 ft. 
.thursday...northeast winds 5 to 10 kt becoming north 10 to
15 kt. chance of showers in the morning. waves 1 ft or less.
.thursday night...east winds 5 to 10 kt veering to southwest.
waves 1 ft or less. 
.friday...southwest winds 5 to 10 kt becoming south 10 to 20 kt
in the afternoon. waves nearly calm building to 1 to 3 ft. 
.friday night...south winds 10 to 20 kt becoming southwest. waves
1 to 3 ft. 
.saturday...west winds 10 to 20 kt becoming southwest. waves 2 to
4 ft. 
.sunday...southwest winds 10 to 20 kt. waves 1 to 3 ft.  

$$