fzus63 kmkx 120718
glflm 
expires:202604121530;;231982

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
218 am cdt sun apr 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 around 29.4 inches will track across the northern 
great plains to northeast minnesota into this evening, then 
develop toward the hudson bay into early tomorrow morning. this 
will bring breezy south winds to all of lake michigan, but with 
the potential for gales over the north half late sunday afternoon 
into early monday morning. a gale watch is now in effect.
decisions regarding gale warning upgrades will be made by early
this afternoon.

winds will weaken later monday morning as the low quickly moves 
away and the trailing cold front stalls over northern lake 
michigan. then, passing low pressure systems along the stalled 
front will lead to intermittent showers and thunderstorms through 
the middle of the week. areas of dense fog will likely occur at
times due to a relatively mild and humid airmass over the cold
waters.


lmz261-362-364-366-563-565-121530-
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-
218 am cdt sun apr 12 2026

two rivers wi to manistee mi north...

...gale watch in effect from this afternoon through late
tonight...

.today...southeast winds to 30 kt becoming south. patchy fog this
morning, then areas of fog this afternoon. rain showers with a
chance of thunderstorms this morning, then chance of rain showers
and thunderstorms this afternoon. waves 6 to 9 ft occasionally to
12 ft building to 7 to 10 ft occasionally to 13 ft. 
.tonight...south gales to 40 kt becoming southwest gales to
35 kt. areas of fog. chance of rain showers and slight chance of
thunderstorms in the evening, then slight chance of rain showers
overnight. waves 8 to 12 ft occasionally to 16 ft subsiding to
8 to 11 ft occasionally to 14 ft. 
.monday...southwest winds to 30 kt becoming west 10 to 20 kt late
in the morning, then becoming northwest early in the afternoon
veering to southeast 10 to 15 kt late. areas of dense fog in the
morning. waves 6 to 9 ft occasionally to 12 ft subsiding to 2 to
4 ft. 
.monday night...southeast winds 10 to 15 kt becoming south 10 to
20 kt. rain showers with a chance of thunderstorms. waves 2 to
4 ft building to 3 to 5 ft. 
.tuesday...southwest winds 10 to 20 kt diminishing to 10 to
15 kt. chance of rain showers in the afternoon. waves 3 to 5 ft. 
.tuesday night...northeast winds 10 to 15 kt increasing to 10 to
20 kt. chance of rain showers. waves 2 to 4 ft building to 4 to
6 ft occasionally to 8 ft. 
.wednesday...northeast winds 10 to 20 kt becoming east 10 to
15 kt. chance of rain showers. waves 4 to 7 ft occasionally to
9 ft. 
.thursday...southwest winds 10 to 20 kt veering to northwest.
chance of rain showers. waves 2 to 4 ft.  

$$

fzus63 kmkx 120718
glflm 
expires:202604121530;;231983

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
218 am cdt sun apr 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 around 29.4 inches will track across the northern 
great plains to northeast minnesota into this evening, then 
develop toward the hudson bay into early tomorrow morning. this 
will bring breezy south winds to all of lake michigan, but with 
the potential for gales over the north half late sunday afternoon 
into early monday morning. a gale watch is now in effect.
decisions regarding gale warning upgrades will be made by early
this afternoon.

winds will weaken later monday morning as the low quickly moves 
away and the trailing cold front stalls over northern lake 
michigan. then, passing low pressure systems along the stalled 
front will lead to intermittent showers and thunderstorms through 
the middle of the week. areas of dense fog will likely occur at
times due to a relatively mild and humid airmass over the cold
waters.


lmz080-567-669-671-673-675-777-779-868-870-872-874-876-878-121530-
lake michigan from michigan city in to st. joseph mi 5 nm
offshore to mid lake-
lake michigan from 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 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 pentwater to manistee mi 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-
218 am cdt sun apr 12 2026

two rivers wi to manistee mi south...

.today...south winds to 30 kt. patchy fog. scattered rain showers
and slight chance of thunderstorms this morning, then chance of
rain showers and thunderstorms this afternoon. waves 6 to 9 ft
occasionally to 12 ft building to 7 to 10 ft occasionally to
13 ft. 
.tonight...southwest winds to 30 kt. a few gale force gusts
possible. patchy fog. rain showers likely with a chance of 
thunderstorms in the evening, then chance of rain showers and 
slight chance of thunderstorms overnight. waves 8 to 11 ft 
occasionally to 14 ft subsiding to 7 to 10 ft occasionally to 13 
ft. 
.monday...southwest winds 15 to 25 kt becoming south 10 to 20 kt.
chance of rain showers in the afternoon. waves 5 to 8 ft
occasionally to 10 ft subsiding to 2 to 4 ft. 
.monday night...south winds 10 to 20 kt becoming southwest 15 to
25 kt. rain showers likely with a chance of thunderstorms in the
evening, then chance of rain showers and thunderstorms overnight.
waves 3 to 5 ft building to 4 to 6 ft occasionally to 8 ft. 
.tuesday...southwest winds 15 to 25 kt becoming south 10 to
20 kt. waves 4 to 6 ft occasionally to 8 ft. 
.tuesday night...south winds 10 to 20 kt becoming southwest 15 to
25 kt. rain showers with a chance of thunderstorms. waves 3 to
5 ft building to 4 to 7 ft occasionally to 9 ft.
.wednesday...southwest winds 15 to 25 kt becoming south 10 to
20 kt. chance of rain showers. waves 5 to 8 ft occasionally to
10 ft. 
.thursday...southwest winds 10 to 20 kt becoming west. chance of
rain showers. waves 3 to 5 ft.  

$$