fzus63 kmkx 011942
glflm 
expires:202609020315;;735921

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
242 pm cdt tue sep 1 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...

light winds, combined with a lingering humid air mass, will 
support areas of fog development across lake michigan through 
tonight. off and on thunderstorms remain possible through 
wednesday as a cold front lingers just to the north of the open 
waters. widespread severe weather isn't expected in any 
thunderstorm activity, though an isolated stronger cell with hail 
and gusty winds can't be entirely ruled out. 

light to modest southerly winds today will shift east- 
northeasterly through the second half of the week as 30.1 inch 
high pressure builds over the hudson bay and broad, 29.6 inch low 
pressure moves into the northern great plains. an unsettled 
pattern featuring multiple additional thunderstorm chances will 
continue through at least friday night. similar to earlier week 
storms, widespread severe weather isn't anticipated, though 
isolated stronger storms with hail and gusty winds are possible.


lmz261-362-364-366-563-565-567-868-020315-
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-
242 pm cdt tue sep 1 2026

sheboygan wi to pentwater mi north...

.tonight...south winds 10 to 20 kt becoming southwest late this
evening, then diminishing to 10 to 15 kt after midnight becoming
west late. patchy fog. slight chance of showers and thunderstorms
overnight. waves 1 to 2 ft. 
.wednesday...northwest winds 5 to 10 kt becoming northeast.
patchy fog in the morning. chance of showers and slight chance of
thunderstorms in the morning, then slight chance of showers in
the afternoon. waves 1 ft or less. 
.wednesday night...northeast winds 5 to 10 kt diminishing to less
than 10 kt. chance of showers overnight. waves 1 ft or less. 
.thursday...northeast winds 5 to 10 kt. chance of showers. waves
1 ft or less. 
.thursday night...northeast winds 5 to 10 kt becoming east.
chance of showers. waves nearly calm. 
.friday...east winds 5 to 10 kt increasing to 10 to 15 kt. chance
of showers in the morning. waves 1 ft or less. 
.friday night...northeast winds 10 to 15 kt becoming east 5 to
10 kt. chance of showers. waves 1 ft or less. 
.saturday...east winds 10 to 15 kt becoming northeast. waves 1 to
2 ft. 
.sunday...south winds 10 to 15 kt becoming southwest. waves 1 to
3 ft.  

$$

fzus63 kmkx 011942
glflm 
expires:202609020315;;735922

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
242 pm cdt tue sep 1 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...

light winds, combined with a lingering humid air mass, will 
support areas of fog development across lake michigan through 
tonight. off and on thunderstorms remain possible through 
wednesday as a cold front lingers just to the north of the open 
waters. widespread severe weather isn't expected in any 
thunderstorm activity, though an isolated stronger cell with hail 
and gusty winds can't be entirely ruled out. 

light to modest southerly winds today will shift east- 
northeasterly through the second half of the week as 30.1 inch 
high pressure builds over the hudson bay and broad, 29.6 inch low 
pressure moves into the northern great plains. an unsettled 
pattern featuring multiple additional thunderstorm chances will 
continue through at least friday night. similar to earlier week 
storms, widespread severe weather isn't anticipated, though 
isolated stronger storms with hail and gusty winds are possible.


lmz080-669-671-673-675-777-779-870-872-874-876-878-020315-
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-
242 pm cdt tue sep 1 2026

sheboygan wi to pentwater mi south...

.tonight...south winds 10 to 15 kt becoming southwest. chance of
showers and slight chance of thunderstorms this evening, then
chance of showers and thunderstorms overnight. patchy fog
overnight. waves 1 to 2 ft. 
.wednesday...southwest winds 10 to 15 kt becoming west. waves
1 to 2 ft. 
.wednesday night...southwest winds 10 to 15 kt backing to
northeast. chance of showers in the evening, then chance of
showers and thunderstorms overnight. waves 1 to 3 ft. 
.thursday...west winds 5 to 10 kt veering to northeast. chance of
showers. waves 1 to 2 ft. 
.thursday night...east winds 5 to 10 kt. showers likely
overnight. waves 1 to 2 ft. 
.friday...east winds 5 to 10 kt becoming southeast. chance of
showers. waves 1 to 2 ft. 
.friday night...northeast winds 5 to 10 kt becoming east 10 to
15 kt. chance of showers and thunderstorms. waves 1 to 2 ft.
.saturday...east winds 10 to 15 kt becoming northeast 5 to 10 kt.
waves 1 to 2 ft. 
.sunday...southeast winds 10 to 15 kt. waves 1 to 3 ft.  

$$