fzus63 kmkx 141943
glflm 
expires:202608150315;;191274

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
243 pm cdt fri aug 14 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...

periods of storms are expected to cross the southern half of lake 
michigan through sunday as a front remains stalled south over 
illinois and indiana. low pressure of 29.7 inches over kansas will 
track to the northeast and east toward southern lake michigan 
tonight into saturday. this low should help to bump up winds and 
waves across the southern two thirds of lake michigan into saturday. 
beyond this system, a broad ridge of high pressure of 30.1 inches 
will push into the great lakes early next week before another 
potential front moves through the region midweek. 


lmz366-565-567-669-868-870-150315-
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 sheboygan to port washington wi 5 nm offshore
to mid lake-
lake michigan from pentwater to manistee mi 5 nm offshore to mid
lake-
lake michigan from whitehall to pentwater mi 5 nm offshore to mid
lake-
243 pm cdt fri aug 14 2026

sturgeon bay wi to point betsie mi south to port washington wi to
whitehall mi...

.tonight...northeast winds 15 to 25 kt becoming east 10 to 20 kt.
slight chance of showers overnight. waves 3 to 5 ft. 
.saturday...southeast winds 10 to 20 kt. slight chance of showers
and thunderstorms in the morning, then slight chance of showers
in the afternoon. waves 4 to 6 ft occasionally to 8 ft. 
.saturday night...southeast winds 10 to 20 kt veering to west
10 to 15 kt. chance of showers overnight. waves 3 to 5 ft
subsiding to 1 to 3 ft. 
.sunday...west winds 10 to 20 kt becoming northwest. waves 1 to
3 ft. 
.sunday night...north winds 10 to 20 kt. waves 2 to 4 ft. 
.monday...north winds 10 to 20 kt becoming west. waves 1 to 3 ft.
.monday night...south winds 10 to 15 kt becoming southwest. waves
1 to 2 ft. 
.tuesday...southwest winds 10 to 20 kt. waves 2 to 4 ft. 
.wednesday...northwest winds 15 to 25 kt becoming north to 30 kt.
chance of showers. waves 3 to 5 ft.  

$$

fzus63 kmkx 141943
glflm 
expires:202608150315;;191275

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
243 pm cdt fri aug 14 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...

periods of storms are expected to cross the southern half of lake 
michigan through sunday as a front remains stalled south over 
illinois and indiana. low pressure of 29.7 inches over kansas will 
track to the northeast and east toward southern lake michigan 
tonight into saturday. this low should help to bump up winds and 
waves across the southern two thirds of lake michigan into saturday. 
beyond this system, a broad ridge of high pressure of 30.1 inches 
will push into the great lakes early next week before another 
potential front moves through the region midweek. 


lmz080-671-673-675-777-779-872-874-876-878-150315-
lake michigan from michigan city in to st. joseph mi 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 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 aug 14 2026

port washington wi to whitehall mi south...

.tonight...north winds 10 to 20 kt veering to southeast. slight
chance of showers and thunderstorms overnight. waves 3 to 5 ft. 
.saturday...southeast winds 10 to 20 kt. chance of showers and
thunderstorms in the morning, then chance of showers and slight
chance of thunderstorms in the afternoon. waves 4 to 6 ft
occasionally to 8 ft. 
.saturday night...southeast winds 10 to 15 kt veering to west.
chance of showers overnight. waves 2 to 4 ft subsiding to 1 to
3 ft. 
.sunday...west winds 10 to 20 kt becoming northwest. chance of
showers. waves 1 to 3 ft. 
.sunday night...north winds 10 to 20 kt. waves 2 to 4 ft. 
.monday...north winds 10 to 15 kt increasing to 10 to 20 kt.
waves 2 to 4 ft. 
.monday night...south winds 10 to 15 kt becoming southwest. waves
1 to 2 ft. 
.tuesday...southwest winds 10 to 20 kt. waves 1 to 3 ft. 
.wednesday...northwest winds 15 to 25 kt increasing to 30 kt.
chance of showers. waves 3 to 5 ft.  

$$