fzus63 kmkx 070212
glflm 
expires:202608070915;;745323

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
912 pm cdt thu aug 6 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 southerly winds tonight will increase by friday afternoon 
as a low pressure trough of 29.8 inches reaches lake superior. 
scattered showers and storms are possible friday night as an
associated cold front crosses lake michigan. west to northwest 
winds behind the front early saturday will quickly return to 
southerly by saturday evening ahead of the next approaching low 
pressure system. an unsettled weather pattern will set up over the
upper great lakes next week where weak waves of low pressure will
cross the region and produce rounds of thunderstorms at times.


lmz261-362-364-366-563-565-567-868-070915-
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-
912 pm cdt thu aug 6 2026

sheboygan wi to pentwater mi north...

.rest of tonight...southeast winds 5 to 10 kt becoming south.
waves 1 ft or less. 
.friday...south winds 10 to 15 kt increasing to 15 to 25 kt.
waves 1 to 3 ft building to 2 to 4 ft. 
.friday night...south winds 15 to 25 kt veering to west 10 to
20 kt. chance of showers. waves 3 to 5 ft. 
.saturday...northwest winds 10 to 20 kt becoming west. waves 2 to
4 ft. 
.saturday night...southwest winds 10 to 20 kt diminishing to
10 to 15 kt. waves 1 to 2 ft. 
.sunday...southwest winds 10 to 20 kt. waves 2 to 4 ft. 
.sunday night...south winds 10 to 20 kt diminishing to 10 to
15 kt. chance of showers. waves 2 to 4 ft. 
.monday...southeast winds 10 to 20 kt becoming south 15 to 25 kt.
chance of showers and thunderstorms. waves 1 to 3 ft.
.tuesday...north winds 10 to 15 kt becoming west 10 to 20 kt.
waves 1 to 2 ft.  

$$

fzus63 kmkx 070212
glflm 
expires:202608070915;;745324

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
912 pm cdt thu aug 6 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 southerly winds tonight will increase by friday afternoon 
as a low pressure trough of 29.8 inches reaches lake superior. 
scattered showers and storms are possible friday night as an
associated cold front crosses lake michigan. west to northwest 
winds behind the front early saturday will quickly return to 
southerly by saturday evening ahead of the next approaching low 
pressure system. an unsettled weather pattern will set up over the
upper great lakes next week where weak waves of low pressure will
cross the region and produce rounds of thunderstorms at times.


lmz080-669-671-673-675-777-779-870-872-874-876-878-070915-
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-
912 pm cdt thu aug 6 2026

sheboygan wi to pentwater mi south...

.rest of tonight...southeast winds 5 to 10 kt becoming south.
waves 1 ft or less. 
.friday...southwest winds 5 to 10 kt becoming south 15 to 25 kt.
waves 1 to 2 ft building to 2 to 4 ft. 
.friday night...south winds 10 to 20 kt becoming west. waves 2 to
4 ft. 
.saturday...northwest winds 10 to 20 kt becoming north. waves
2 to 4 ft. 
.saturday night...south winds 10 to 15 kt. waves 1 to 3 ft. 
.sunday...south winds 10 to 20 kt. chance of showers in the
morning, then chance of showers and thunderstorms in the
afternoon. waves 2 to 4 ft. 
.sunday night...south winds 10 to 20 kt becoming southwest 10 to
15 kt. chance of showers and thunderstorms. waves 2 to 4 ft. 
.monday...southwest winds 10 to 20 kt becoming south 15 to 25 kt.
showers likely with a chance of thunderstorms. waves 1 to 3 ft. 
.tuesday...northwest winds 10 to 15 kt increasing to 10 to 20 kt.
chance of showers. waves 1 to 3 ft.  

$$