fzus63 kmkx 120809
glflm 
expires:202603121530;;064498

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
309 am cdt thu mar 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...

high pressure of 30.2 inches approaching from the west will move
across lake michigan midday. thus decreasing northwest winds are
expected this morning then backing southerly into the afternoon as
the high moves away.
 
strong low pressure of 29.0 inches is then expected to move 
through northern wisconsin into northern michigan tonight into 
friday. increasing southerly winds are expected late this
afternoon and evening ahead of the low. southerly gales are
expected over the entire lake by late evening then becoming west
northwesterly for friday. a gale warning is now in effect from
late this evening into friday evening. a few storm force gusts are
also possible.

winds are expected to ease friday night into saturday as high 
pressure of 30.3 inches moves in from the northwest. another 
strong low pressure system is likely to move through the region 
late in the weekend into early next week, with another round of 
gales likely. a colder air mass behind the low may lead to a 
round of heavy freezing spray sunday night into monday as the 
strong winds and higher waves linger.


lmz261-362-364-366-563-565-567-868-121530-
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-
309 am cdt thu mar 12 2026

sheboygan wi to pentwater mi north...

...gale warning in effect from this evening through friday
evening...

.today...northwest winds 10 to 20 kt backing to southwest. waves
3 to 5 ft subsiding to 1 to 3 ft. 
.tonight...south winds to 30 kt increasing to gales to 45 kt.
chance of snow and slight chance of rain in the evening, then
snow and rain overnight. waves 4 to 6 ft occasionally to 8 ft
building to 15 to 20 ft occasionally to 26 ft. 
.friday...southwest gales to 40 kt veering to northwest gales to
45 kt. chance of snow and rain in the morning, then chance of
snow in the afternoon. waves 14 to 18 ft occasionally to 23 ft
subsiding to 12 to 16 ft occasionally to 21 ft. 
.friday night...northwest gales to 40 kt diminishing to 30 kt
overnight. waves 12 to 16 ft occasionally to 21 ft subsiding to
6 to 9 ft occasionally to 12 ft. 
.saturday...northwest winds 10 to 20 kt backing to southwest
10 to 15 kt. waves 3 to 5 ft subsiding to 1 to 3 ft. 
.saturday night...southeast winds 10 to 15 kt becoming east 15 to
25 kt. chance of snow. waves 1 to 3 ft building to 4 to 6 ft
occasionally to 8 ft. 
.sunday...east gales to 35 kt becoming northeast gales to 40 kt.
snow. waves 6 to 9 ft occasionally to 12 ft building to 12 to
16 ft occasionally to 21 ft. 
.monday...north storm force winds to 50 kt becoming northwest
gales to 45 kt. heavy freezing spray. snow likely. waves 18 to
23 ft occasionally to 30 ft subsiding to 14 to 18 ft occasionally
to 23 ft.  

$$

fzus63 kmkx 120809
glflm 
expires:202603121530;;064499

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
309 am cdt thu mar 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...

high pressure of 30.2 inches approaching from the west will move
across lake michigan midday. thus decreasing northwest winds are
expected this morning then backing southerly into the afternoon as
the high moves away.
 
strong low pressure of 29.0 inches is then expected to move 
through northern wisconsin into northern michigan tonight into 
friday. increasing southerly winds are expected late this
afternoon and evening ahead of the low. southerly gales are
expected over the entire lake by late evening then becoming west
northwesterly for friday. a gale warning is now in effect from
late this evening into friday evening. a few storm force gusts are
also possible.

winds are expected to ease friday night into saturday as high 
pressure of 30.3 inches moves in from the northwest. another 
strong low pressure system is likely to move through the region 
late in the weekend into early next week, with another round of 
gales likely. a colder air mass behind the low may lead to a 
round of heavy freezing spray sunday night into monday as the 
strong winds and higher waves linger.


lmz080-669-671-673-675-777-779-870-872-874-876-878-121530-
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-
309 am cdt thu mar 12 2026

sheboygan wi to pentwater mi south...

...gale warning in effect from this evening through friday
evening...

.today...northwest winds 10 to 20 kt backing to south. waves 4 to
6 ft occasionally to 8 ft subsiding to 2 to 4 ft. 
.tonight...south winds to 30 kt increasing to gales to 40 kt late
in the evening, then increasing to 45 kt after midnight becoming 
southwest. chance of rain and snow in the evening, then chance of 
rain overnight. waves 3 to 5 ft building to 14 to 18 ft 
occasionally to 23 ft. 
.friday...westerly gales to 45 kt. a few storm force gusts
possible. waves 14 to 18 ft occasionally to 23 ft. 
.friday night...northwest gales to 40 kt diminishing to 15 to
25 kt overnight. waves 12 to 16 ft occasionally to 21 ft
subsiding to 8 to 11 ft occasionally to 14 ft. 
.saturday...north winds 10 to 15 kt veering to east 5 to 10 kt.
waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to 4 ft. 
.saturday night...east winds 10 to 20 kt increasing to 30 kt.
chance of snow. waves 1 to 3 ft building to 4 to 7 ft
occasionally to 9 ft. 
.sunday...east gales to 35 kt increasing to gales to 40 kt. rain
and snow. waves 8 to 11 ft occasionally to 14 ft building to
12 to 16 ft occasionally to 21 ft. 
.monday...northwest gales to 45 kt. freezing spray. chance of
snow. waves 18 to 23 ft occasionally to 30 ft.  

$$