fzus63 kmkx 190215
glflm 
expires:202604190915;;611271

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
915 pm cdt sat apr 18 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...

breezy west northwest winds are expected into tonight, as strong 
low pressure around 29.0 inches continues to move well to the 
northeast of the region, with high pressure around 30.2 inches 
over south central canada. this high pressure will move southeast
across the region sunday into monday, with winds gradually 
weakening. as the high pressure shifts east monday night into 
tuesday, breezy southerly winds should develop over the region.
will see a cold front extending from a low pressure trekking 
across the hudson bay region tuesday works its way down the lake 
turning winds more northerly behind it with another high pressure 
around 30.2 inches passing to the northeast of the region 
wednesday, with winds weakening. winds should become southeast to 
south and increase later in the week, as strong low pressure 
around 29.2 inches develops in the northern plains.


lmz261-362-364-366-563-565-567-868-190915-
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-
915 pm cdt sat apr 18 2026

sheboygan wi to pentwater mi north...

.rest of tonight...west winds 10 to 20 kt. waves 4 to 6 ft
occasionally to 8 ft subsiding to 3 to 5 ft. 
.sunday...northwest winds 15 to 25 kt becoming north. waves 2 to
4 ft. 
.sunday night...north winds 15 to 25 kt diminishing to 10 to
15 kt. waves 3 to 5 ft subsiding to 1 to 3 ft. 
.monday...west winds 10 to 15 kt becoming south 15 to 25 kt in
the afternoon. waves 1 to 3 ft building to 2 to 4 ft. 
.monday night...south winds to 30 kt. waves 5 to 8 ft
occasionally to 10 ft. 
.tuesday...southwest winds to 30 kt diminishing to 10 to 20 kt in
the afternoon. waves 5 to 8 ft occasionally to 10 ft subsiding to
4 to 7 ft occasionally to 9 ft. 
.tuesday night...northeast winds 10 to 15 kt. waves 3 to 5 ft
subsiding to 1 to 3 ft. 
.wednesday...northeast winds 10 to 15 kt diminishing to 5 to
10 kt. waves 1 to 3 ft. 
.thursday...south winds 15 to 25 kt. waves 4 to 6 ft occasionally
to 8 ft building to 5 to 8 ft occasionally to 10 ft.  

$$

fzus63 kmkx 190215
glflm 
expires:202604190915;;611272

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
915 pm cdt sat apr 18 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...

breezy west northwest winds are expected into tonight, as strong 
low pressure around 29.0 inches continues to move well to the 
northeast of the region, with high pressure around 30.2 inches 
over south central canada. this high pressure will move southeast
across the region sunday into monday, with winds gradually 
weakening. as the high pressure shifts east monday night into 
tuesday, breezy southerly winds should develop over the region.
will see a cold front extending from a low pressure trekking 
across the hudson bay region tuesday works its way down the lake 
turning winds more northerly behind it with another high pressure 
around 30.2 inches passing to the northeast of the region 
wednesday, with winds weakening. winds should become southeast to 
south and increase later in the week, as strong low pressure 
around 29.2 inches develops in the northern plains.


lmz080-669-671-673-675-777-779-870-872-874-876-878-190915-
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-
915 pm cdt sat apr 18 2026

sheboygan wi to pentwater mi south...

.rest of tonight...west winds 15 to 25 kt diminishing to 10 to
20 kt. waves 4 to 6 ft occasionally to 8 ft. 
.sunday...west winds 10 to 20 kt becoming northwest. chance of
rain showers and slight chance of snow showers in the morning,
then chance of rain showers in the afternoon. waves 3 to 5 ft. 
.sunday night...north winds 10 to 20 kt diminishing to 10 to
15 kt late in the evening, then becoming northeast after midnight
diminishing to 5 to 10 kt late. waves 2 to 4 ft. 
.monday...east winds 5 to 10 kt becoming southeast 10 to 20 kt in
the afternoon. waves 1 to 3 ft building to 2 to 4 ft. 
.monday night...southeast winds 15 to 25 kt becoming south to
30 kt. waves 4 to 7 ft occasionally to 9 ft building to 5 to 8 ft
occasionally to 10 ft. 
.tuesday...south winds 15 to 25 kt diminishing to 10 to 20 kt.
waves 5 to 8 ft occasionally to 10 ft subsiding to 4 to 7 ft
occasionally to 9 ft. 
.tuesday night...west winds 10 to 15 kt veering to north. waves
2 to 4 ft. 
.wednesday...northeast winds 10 to 15 kt becoming north 5 to
10 kt. waves 1 to 3 ft. 
.thursday...south winds 15 to 25 kt. waves 4 to 6 ft occasionally
to 8 ft building to 4 to 7 ft occasionally to 9 ft.  

$$