fzus63 kmkx 151943
glflm 
expires:202605160315;;615119

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
243 pm cdt fri may 15 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 29.1 inches tracking across ontario is 
bringing increasing southerly winds across lake michigan this 
afternoon into the evening. still looking at a few gale force 
gusts to occur over the northern third of lake michigan into this 
evening and the gale warning remains in effect. then a line of 
showers and thunderstorms will push across the region overnight 
into early saturday morning along the low pressure's cold front. 
looking at the the front to bring more southwesterly winds into 
saturday as the front stalls south of lake michigan. then another 
low pressure around 29.2 inches is progged to develop over the 
plains sunday and lift into the upper midwest into the start of 
next week. this will bring increasing southerly winds and 
additional shower and thunderstorm potential through monday 
night/tuesday. then high pressure looks to build in for midweek 
behind the early week low pressure system.


lmz366-565-567-868-160315-
lake michigan from point betsie to manistee mi 5 nm offshore to
mid lake-
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-
243 pm cdt fri may 15 2026

sturgeon bay wi to point betsie mi south to sheboygan wi to
pentwater mi...

.tonight...south winds to 30 kt diminishing to 15 to 25 kt.
chance of rain showers and slight chance of thunderstorms
overnight. waves 6 to 9 ft occasionally to 12 ft. 
.saturday...southwest winds 10 to 20 kt. chance of showers in the
morning. waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to
4 ft. 
.saturday night...southwest winds 10 to 15 kt backing to
northeast. waves 2 to 4 ft subsiding to 1 to 3 ft. 
.sunday...east winds 10 to 20 kt becoming southeast. chance of
rain showers. waves 2 to 4 ft building to 3 to 5 ft. 
.sunday night...southeast winds to 30 kt becoming south. chance
of showers in the evening. waves 5 to 8 ft occasionally to 10 ft.
.monday...south winds to 30 kt. chance of showers in the morning,
then showers likely in the afternoon. waves 6 to 9 ft
occasionally to 12 ft. 
.monday night...south winds to 30 kt. showers likely with a
chance of thunderstorms. waves 6 to 9 ft occasionally to 12 ft. 
.tuesday...south winds to 30 kt becoming southwest. chance of
showers. waves 7 to 10 ft occasionally to 13 ft. 
.wednesday...west winds 10 to 20 kt becoming northwest. waves
3 to 5 ft.  

$$

fzus63 kmkx 151943
glflm 
expires:202605160315;;615120

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
243 pm cdt fri may 15 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 29.1 inches tracking across ontario is 
bringing increasing southerly winds across lake michigan this 
afternoon into the evening. still looking at a few gale force 
gusts to occur over the northern third of lake michigan into this 
evening and the gale warning remains in effect. then a line of 
showers and thunderstorms will push across the region overnight 
into early saturday morning along the low pressure's cold front. 
looking at the the front to bring more southwesterly winds into 
saturday as the front stalls south of lake michigan. then another 
low pressure around 29.2 inches is progged to develop over the 
plains sunday and lift into the upper midwest into the start of 
next week. this will bring increasing southerly winds and 
additional shower and thunderstorm potential through monday 
night/tuesday. then high pressure looks to build in for midweek 
behind the early week low pressure system.


lmz080-669-671-673-675-777-779-870-872-874-876-878-160315-
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-
243 pm cdt fri may 15 2026

sheboygan wi to pentwater mi south...

.tonight...south winds to 30 kt diminishing to 15 to 25 kt. rain
showers likely with a chance of thunderstorms overnight. waves
5 to 8 ft occasionally to 10 ft subsiding to 4 to 7 ft
occasionally to 9 ft. 
.saturday...southwest winds 10 to 20 kt becoming south 10 to
15 kt. slight chance of showers and thunderstorms in the morning.
waves 3 to 5 ft subsiding to 2 to 4 ft. 
.saturday night...south winds 10 to 15 kt becoming southeast.
chance of rain showers overnight. waves 1 to 3 ft. 
.sunday...southeast winds 10 to 20 kt increasing to 15 to 25 kt.
chance of rain showers. waves 2 to 4 ft building to 3 to 5 ft. 
.sunday night...south winds to 30 kt. waves 5 to 8 ft
occasionally to 10 ft. 
.monday...south winds to 30 kt. chance of showers in the morning,
then showers likely with a chance of thunderstorms in the
afternoon. waves 6 to 9 ft occasionally to 12 ft. 
.monday night...south winds to 30 kt. showers likely with a
chance of thunderstorms. waves 6 to 9 ft occasionally to 12 ft. 
.tuesday...south winds to 30 kt becoming southwest. chance of
showers. waves 7 to 10 ft occasionally to 13 ft. 
.wednesday...northwest winds 10 to 20 kt. waves 3 to 5 ft.  

$$