fzus63 kmkx 170825
glflm 
expires:202604171515;;512314

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
325 am cdt fri apr 17 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...

winds remain light and variable overnight as a weak surface ridge
moves over the lake. dense fog will continue over the lake 
through this time. winds then come around to southerly this 
morning as a surface low of 29.5 inches approaches from the 
central plains. this surface low will quickly move from omaha to 
duluth from this morning into the afternoon. winds will become 
gusty and southeasterly tonight, and strong to severe storms will 
move east over the lake as a cold front sweeps through the area. 
winds then become northwesterly behind the cold front saturday 
morning. breezy northwesterly winds then continue saturday through
sunday as the low then races northeast toward hudson bay. winds 
ease monday morning as high pressure move southeast over the upper
great lakes.


lmz261-362-364-366-563-565-567-868-171515-
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-
325 am cdt fri apr 17 2026

sheboygan wi to pentwater mi north...

...dense fog advisory in effect until 7 pm cdt this evening...

.today...southeast winds 10 to 15 kt increasing to 30 kt.
widespread dense fog this morning, then patchy dense fog this
afternoon. waves 1 to 2 ft building to 4 to 6 ft occasionally to
8 ft. 
.tonight...southeast winds to 30 kt veering to southwest 15 to
25 kt. patchy fog. rain showers and thunderstorms likely in the
evening, then chance of rain showers and thunderstorms overnight.
waves 5 to 8 ft occasionally to 10 ft. 
.saturday...northwest winds to 30 kt becoming west 15 to 25 kt.
chance of rain showers in the morning. waves 4 to 7 ft
occasionally to 9 ft subsiding to 3 to 5 ft. 
.saturday night...northwest winds 15 to 25 kt. waves 4 to 6 ft
occasionally to 8 ft. 
.sunday...northwest winds to 30 kt. waves 3 to 5 ft. 
.sunday night...north winds 15 to 25 kt diminishing to 10 to
20 kt. waves 2 to 4 ft. 
.monday...southwest winds 10 to 15 kt becoming south 10 to 20 kt.
waves 1 to 2 ft building to 2 to 4 ft. 
.tuesday...southwest winds to 30 kt diminishing to 15 to 25 kt.
waves 7 to 10 ft occasionally to 13 ft.  

$$

fzus63 kmkx 170825
glflm 
expires:202604171515;;512315

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
325 am cdt fri apr 17 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...

winds remain light and variable overnight as a weak surface ridge
moves over the lake. dense fog will continue over the lake 
through this time. winds then come around to southerly this 
morning as a surface low of 29.5 inches approaches from the 
central plains. this surface low will quickly move from omaha to 
duluth from this morning into the afternoon. winds will become 
gusty and southeasterly tonight, and strong to severe storms will 
move east over the lake as a cold front sweeps through the area. 
winds then become northwesterly behind the cold front saturday 
morning. breezy northwesterly winds then continue saturday through
sunday as the low then races northeast toward hudson bay. winds 
ease monday morning as high pressure move southeast over the upper
great lakes.


lmz080-669-671-673-675-777-779-870-872-874-876-878-171515-
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-
325 am cdt fri apr 17 2026

sheboygan wi to pentwater mi south...

...dense fog advisory in effect until 7 pm cdt this evening...

.today...southeast winds 10 to 15 kt increasing to 30 kt.
widespread dense fog this morning, then patchy dense fog this
afternoon. waves 1 ft or less building to 4 to 6 ft occasionally
to 8 ft. 
.tonight...south winds to 30 kt veering to southwest 15 to 25 kt.
patchy fog. chance of rain showers and thunderstorms in the
evening, then thunderstorms likely with a chance of rain showers
overnight. a few strong to severe thunderstorms possible. waves 4
to 7 ft occasionally to 9 ft.
.saturday...west winds to 30 kt diminishing to 10 to 20 kt.
chance of rain showers in the morning. waves 4 to 7 ft
occasionally to 9 ft. 
.saturday night...west winds 15 to 25 kt. waves 4 to 7 ft
occasionally to 9 ft. 
.sunday...northwest winds 15 to 25 kt. waves 4 to 6 ft
occasionally to 8 ft. 
.sunday night...north winds 10 to 20 kt diminishing to 10 to
15 kt. waves 2 to 4 ft subsiding to 1 to 3 ft. 
.monday...southeast winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 2 ft building to 2 to 4 ft. 
.tuesday...south winds to 30 kt diminishing to 15 to 25 kt. waves
6 to 9 ft occasionally to 12 ft.  

$$