fzus63 kmkx 190257
glflm 
expires:202609190915;;686972

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
957 pm cdt fri sep 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...

low pressure around 29.9 inches over the missouri river this 
afternoon will track over or just south of the waters during the 
day on saturday. winds will veer east-southeasterly ahead of the 
low, becoming gusty at times. a few gusts could briefly approach 
gales, particularly tonight and saturday morning. areas of 
widespread showers and thunderstorms will accompany the passing 
area of low pressure tonight through at least saturday night.

winds will trend northeasterly sunday through monday night, as 
the aforementioned area of low pressure slowly moves into the 
ohio river valley. additional rain showers will accompany the 
passing low. high pressure around 30.5 inches will concurrently 
slide into ontario from the canadian great plains, with gusty 
winds expected through most of the late weekend to early week 
time frame. similar to saturday, gusts could occasionally 
approach gale thresholds during the sunday into monday night time
frame. winds will steadily taper tuesday through wednesday, as a 
new area of high pressure around 30.3 inches builds into northern
wisconsin.


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-
957 pm cdt fri sep 18 2026

sheboygan wi to pentwater mi north...

.rest of tonight...east winds 10 to 20 kt becoming southeast
15 to 25 kt. chance of showers. waves 3 to 5 ft building to 4 to
6 ft occasionally to 8 ft. 
.saturday...southeast winds to 30 kt becoming east 10 to 20 kt.
chance of showers. waves 6 to 9 ft occasionally to 12 ft. 
.saturday night...east winds 10 to 20 kt becoming northeast.
chance of showers in the evening. waves 4 to 6 ft occasionally to
8 ft subsiding to 3 to 5 ft. 
.sunday...northeast winds to 30 kt. waves 7 to 10 ft occasionally
to 13 ft. 
.sunday night...northeast winds to 30 kt becoming east 15 to
25 kt. waves 7 to 10 ft occasionally to 13 ft. 
.monday...east winds to 30 kt becoming northeast. waves 4 to 7 ft
occasionally to 9 ft. 
.monday night...east winds to 30 kt diminishing to 15 to 25 kt.
waves 4 to 7 ft occasionally to 9 ft. 
.tuesday...east winds 15 to 25 kt becoming northeast to 30 kt.
waves 4 to 6 ft occasionally to 8 ft. 
.wednesday...east winds 15 to 25 kt becoming northeast. waves
2 to 4 ft.  

$$

fzus63 kmkx 190257
glflm 
expires:202609190915;;686973

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
957 pm cdt fri sep 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...

low pressure around 29.9 inches over the missouri river this 
afternoon will track over or just south of the waters during the 
day on saturday. winds will veer east-southeasterly ahead of the 
low, becoming gusty at times. a few gusts could briefly approach 
gales, particularly tonight and saturday morning. areas of 
widespread showers and thunderstorms will accompany the passing 
area of low pressure tonight through at least saturday night.

winds will trend northeasterly sunday through monday night, as 
the aforementioned area of low pressure slowly moves into the 
ohio river valley. additional rain showers will accompany the 
passing low. high pressure around 30.5 inches will concurrently 
slide into ontario from the canadian great plains, with gusty 
winds expected through most of the late weekend to early week 
time frame. similar to saturday, gusts could occasionally 
approach gale thresholds during the sunday into monday night time
frame. winds will steadily taper tuesday through wednesday, as a 
new area of high pressure around 30.3 inches builds into northern
wisconsin.


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-
957 pm cdt fri sep 18 2026

sheboygan wi to pentwater mi south...

.rest of tonight...east winds 15 to 25 kt increasing to 30 kt.
slight chance of showers late this evening, then showers and
slight chance of thunderstorms overnight. waves 4 to 6 ft
occasionally to 8 ft building to 6 to 9 ft occasionally to 12 ft.
.saturday...southeast winds to 30 kt diminishing to 15 to 25 kt.
showers with a chance of thunderstorms in the morning, then
chance of showers and slight chance of thunderstorms in the
afternoon. waves 7 to 10 ft occasionally to 13 ft subsiding to
6 to 9 ft occasionally to 12 ft. 
.saturday night...east winds 10 to 20 kt becoming northeast 15 to
25 kt. showers likely with a chance of thunderstorms in the
evening, then chance of showers overnight. waves 4 to 7 ft
occasionally to 9 ft subsiding to 4 to 6 ft occasionally to 8 ft.
.sunday...northeast winds to 30 kt increasing to gales to 40 kt
in the afternoon. chance of showers. waves 7 to 10 ft
occasionally to 13 ft building to 10 to 14 ft occasionally to
18 ft. 
.sunday night...northeast gales to 35 kt becoming east to 30 kt.
chance of showers overnight. waves 10 to 14 ft occasionally to
18 ft subsiding to 8 to 11 ft occasionally to 14 ft. 
.monday...east winds to 30 kt becoming northeast gales to 35 kt.
waves 7 to 10 ft occasionally to 13 ft building to 8 to 12 ft
occasionally to 16 ft. 
.monday night...northeast gales to 35 kt becoming east to 30 kt.
waves 8 to 11 ft occasionally to 14 ft subsiding to 6 to 9 ft
occasionally to 12 ft. 
.tuesday...northeast winds to 30 kt. waves 7 to 10 ft
occasionally to 13 ft. 
.wednesday...northeast winds 15 to 25 kt diminishing to 10 to
20 kt. waves 4 to 7 ft occasionally to 9 ft.  

$$