fzus63 kmkx 122201
glflm 
expires:202605130330;;457384

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
501 pm cdt tue may 12 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 of 29.7 inches over northern wisconsin early this
afternoon will reach northern lake michigan early this evening 
and lake huron by early wednesday morning. an associated cold 
front will approach the lake today, moving through this evening.
gusty south to southwest winds will continue today as the front
approaches, with a few gales possible across central and 
northern portions of the lake through late afternoon. showers 
and a few storms will be possible ahead of and along the front 
today. 

gusty west to northwest winds will arrive behind the cold front 
tonight into wednesday. gusts could approach gale force for a time
tonight into early wednesday, but are expected to mainly stay 
below gales. lighter northerly winds are then likely thursday as 
high pressure of 30.2 inches moves overhead. breezy southerly 
winds are expected to develop friday ahead of the next approaching
low pressure system.


lmz364-366-563-565-567-868-130330-
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-
501 pm cdt tue may 12 2026

rock island passage to charlevoix mi south to sheboygan wi to
pentwater mi...

...gale warning in effect until 11 pm cdt this evening...

.tonight...south gales to 35 kt veering to northwest winds to 30
kt around midnight. chance of rain showers and slight chance of 
thunderstorms this evening, then slight chance of rain showers 
overnight. waves 6 to 9 ft occasionally to 12 ft subsiding to 4 to
7 ft occasionally to 9 ft.
.wednesday...northwest winds to 30 kt becoming north. waves 5 to
8 ft occasionally to 10 ft subsiding to 4 to 6 ft occasionally to
8 ft. 
.wednesday night...north winds to 30 kt diminishing to 10 to
20 kt. waves 2 to 4 ft subsiding to 1 to 3 ft. 
.thursday...north winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 2 ft. 
.thursday night...south winds 5 to 10 kt increasing to 10 to
20 kt overnight. waves 1 to 2 ft building to 2 to 4 ft. 
.friday...south winds to 30 kt. chance of rain showers. waves
5 to 8 ft occasionally to 10 ft building to 7 to 10 ft
occasionally to 13 ft. 
.friday night...south winds to 30 kt becoming southwest. waves
7 to 10 ft occasionally to 13 ft. 
.saturday...southwest winds 15 to 25 kt. waves 4 to 6 ft
occasionally to 8 ft subsiding to 2 to 4 ft. 
.sunday...east winds 10 to 20 kt. chance of rain showers and
thunderstorms. waves 2 to 4 ft building to 3 to 5 ft.  

$$

fzus63 kmkx 122201
glflm 
expires:202605130330;;457385

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
501 pm cdt tue may 12 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 of 29.7 inches over northern wisconsin early this
afternoon will reach northern lake michigan early this evening 
and lake huron by early wednesday morning. an associated cold 
front will approach the lake today, moving through this evening.
gusty south to southwest winds will continue today as the front
approaches, with a few gales possible across central and 
northern portions of the lake through late afternoon. showers 
and a few storms will be possible ahead of and along the front 
today. 

gusty west to northwest winds will arrive behind the cold front 
tonight into wednesday. gusts could approach gale force for a time
tonight into early wednesday, but are expected to mainly stay 
below gales. lighter northerly winds are then likely thursday as 
high pressure of 30.2 inches moves overhead. breezy southerly 
winds are expected to develop friday ahead of the next approaching
low pressure system.


lmz669-671-870-872-130330-
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 whitehall to pentwater mi 5 nm offshore to mid
lake-
lake michigan from grand haven to whitehall mi 5 nm offshore to
mid lake-
501 pm cdt tue may 12 2026

sheboygan wi to pentwater mi south to north point light wi to
grand haven mi...

...gale warning in effect until 11 pm cdt this evening...

.tonight...southwest gales to 35 kt veering to northwest winds to
30 kt around midnight. chance of rain showers and thunderstorms 
this evening. waves 4 to 7 ft occasionally to 9 ft subsiding to 4 
to 6 ft occasionally to 8 ft.
.wednesday...northwest winds to 30 kt becoming north. waves 5 to
8 ft occasionally to 10 ft subsiding to 4 to 6 ft occasionally to
8 ft. 
.wednesday night...north winds to 30 kt becoming northwest 10 to
20 kt. waves 3 to 5 ft subsiding to 2 to 4 ft. 
.thursday...north winds 10 to 20 kt. waves 1 to 3 ft. 
.thursday night...southeast winds 10 to 15 kt becoming south
10 to 20 kt. waves 1 to 2 ft building to 2 to 4 ft. 
.friday...south winds to 30 kt. chance of rain showers. waves
6 to 9 ft occasionally to 12 ft. 
.friday night...south winds 15 to 25 kt becoming southwest 10 to
20 kt. waves 6 to 9 ft occasionally to 12 ft subsiding to 4 to
7 ft occasionally to 9 ft. 
.saturday...southwest winds 10 to 20 kt. waves 3 to 5 ft
subsiding to 2 to 4 ft. 
.sunday...east winds 10 to 20 kt becoming southeast. chance of
rain showers. waves 3 to 5 ft.  

$$

fzus63 kmkx 122201
glflm 
expires:202605130330;;457386

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
501 pm cdt tue may 12 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 of 29.7 inches over northern wisconsin early this
afternoon will reach northern lake michigan early this evening 
and lake huron by early wednesday morning. an associated cold 
front will approach the lake today, moving through this evening.
gusty south to southwest winds will continue today as the front
approaches, with a few gales possible across central and 
northern portions of the lake through late afternoon. showers 
and a few storms will be possible ahead of and along the front 
today. 

gusty west to northwest winds will arrive behind the cold front 
tonight into wednesday. gusts could approach gale force for a time
tonight into early wednesday, but are expected to mainly stay 
below gales. lighter northerly winds are then likely thursday as 
high pressure of 30.2 inches moves overhead. breezy southerly 
winds are expected to develop friday ahead of the next approaching
low pressure system.


lmz080-673-675-777-779-874-876-878-130330-
lake michigan from michigan city in to st. joseph mi 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 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-
501 pm cdt tue may 12 2026

north point light wi to grand haven mi south...

.tonight...southwest winds to 30 kt veering to northwest. chance
of showers and slight chance of thunderstorms this evening. waves
4 to 6 ft occasionally to 8 ft. 
.wednesday...northwest winds to 30 kt becoming north. waves 5 to
8 ft occasionally to 10 ft subsiding to 4 to 7 ft occasionally to
9 ft. 
.wednesday night...north winds to 30 kt becoming northwest 10 to
20 kt. waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to
4 ft. 
.thursday...north winds 10 to 20 kt. waves 1 to 3 ft. 
.thursday night...southeast winds 10 to 15 kt becoming south.
waves 1 to 2 ft building to 2 to 4 ft. 
.friday...south winds 15 to 25 kt. chance of showers. waves 4 to
7 ft occasionally to 9 ft. 
.friday night...south winds 15 to 25 kt becoming southwest 10 to
20 kt. waves 4 to 6 ft occasionally to 8 ft subsiding to 3 to
5 ft. 
.saturday...southwest winds 10 to 15 kt becoming south. waves
2 to 4 ft subsiding to 1 to 3 ft. 
.sunday...southeast winds 10 to 20 kt. chance of showers. waves
3 to 5 ft.  

$$