fzus63 kmkx 071938
glflm 
expires:202604080315;;993326

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
238 pm cdt tue apr 7 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 around 30.6 inches has moved across central lake 
michigan lowering winds generally across the lake. low pressure
around 29.5 inches will then track along the northern 
plains/canadian border tonight and wednesday, then track north 
of lake superior wednesday night into thursday morning. this 
will result in breezy southerly winds over lake michigan on 
wednesday with gale force gusts up to 40 kt. a gale warning is 
in effect for the northern three quarters of the lake.

much weaker north winds will then take hold by thursday 
afternoon into friday as high pressure around 30.4 inches slowly
moves through the region. breezy southerly winds return toward
early next week as a stronger system pushes in from the west.


lmz261-362-364-366-563-565-567-868-080315-
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-
238 pm cdt tue apr 7 2026

sheboygan wi to pentwater mi north...

...gale warning in effect from wednesday morning through late
wednesday night...

.tonight...south winds 10 to 15 kt increasing to 30 kt. waves
1 to 3 ft building to 4 to 6 ft occasionally to 8 ft.
.wednesday...south gales to 35 kt increasing to gales to 40 kt.
chance of rain and snow showers in the morning. waves 6 to 9 ft
occasionally to 12 ft building to 10 to 14 ft occasionally to
18 ft. 
.wednesday night...south gales to 40 kt increasing to gales to
45 kt late in the evening, then becoming southwest gales to 35 kt
after midnight diminishing to 30 kt late. rain showers in the
evening, then chance of rain showers overnight. waves 12 to 16 ft
occasionally to 21 ft subsiding to 6 to 9 ft occasionally to
12 ft. 
.thursday...southwest winds to 30 kt becoming west. waves 4 to
7 ft occasionally to 9 ft subsiding to 3 to 5 ft. 
.thursday night...northwest winds 10 to 15 kt veering to
northeast. chance of rain showers overnight. waves 1 to 3 ft
subsiding to 1 to 2 ft. 
.friday...north winds 5 to 10 kt increasing to 10 to 15 kt. waves
1 to 2 ft. 
.friday night...northeast winds 5 to 10 kt veering to southeast.
waves 1 ft or less. 
.saturday...south winds 5 to 10 kt increasing to 10 to 15 kt.
waves 1 to 2 ft. 
.sunday...south winds to 30 kt. rain showers likely. waves 6 to
9 ft occasionally to 12 ft building to 7 to 10 ft occasionally to
13 ft.  

$$

fzus63 kmkx 071938
glflm 
expires:202604080315;;993327

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
238 pm cdt tue apr 7 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 around 30.6 inches has moved across central lake 
michigan lowering winds generally across the lake. low pressure
around 29.5 inches will then track along the northern 
plains/canadian border tonight and wednesday, then track north 
of lake superior wednesday night into thursday morning. this 
will result in breezy southerly winds over lake michigan on 
wednesday with gale force gusts up to 40 kt. a gale warning is 
in effect for the northern three quarters of the lake.

much weaker north winds will then take hold by thursday 
afternoon into friday as high pressure around 30.4 inches slowly
moves through the region. breezy southerly winds return toward
early next week as a stronger system pushes in from the west.


lmz669-671-673-870-872-874-080315-
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 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-
238 pm cdt tue apr 7 2026

sheboygan wi to pentwater mi south to wind point wi to holland
mi...

...gale warning in effect from wednesday morning through late
wednesday night...

.tonight...southeast winds 10 to 15 kt becoming south to 30 kt.
waves 1 to 2 ft building to 3 to 5 ft. 
.wednesday...south winds to 30 kt increasing to gales to 40 kt.
chance of rain showers in the morning. waves 5 to 8 ft
occasionally to 10 ft building to 8 to 12 ft occasionally to
16 ft. 
.wednesday night...south gales to 40 kt becoming southwest gales
to 35 kt after midnight, then diminishing to 30 kt late. chance
of rain showers in the evening, then rain showers overnight.
waves 8 to 12 ft occasionally to 16 ft subsiding to 6 to 9 ft
occasionally to 12 ft. 
.thursday...west winds 10 to 20 kt becoming southwest. waves 4 to
7 ft occasionally to 9 ft subsiding to 3 to 5 ft. 
.thursday night...east winds 5 to 10 kt becoming northeast.
chance of rain showers. waves 1 to 3 ft subsiding to 1 to 2 ft. 
.friday...north winds 5 to 10 kt increasing to 10 to 15 kt.
chance of rain showers. waves 1 to 2 ft. 
.friday night...northeast winds 10 to 15 kt diminishing to 5 to
10 kt. waves 1 to 2 ft. 
.saturday...east winds 5 to 10 kt becoming southeast. waves 1 to
2 ft. 
.sunday...south winds to 30 kt. chance of rain showers. waves
6 to 9 ft occasionally to 12 ft.  

$$

fzus63 kmkx 071938
glflm 
expires:202604080315;;993328

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
238 pm cdt tue apr 7 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 around 30.6 inches has moved across central lake 
michigan lowering winds generally across the lake. low pressure
around 29.5 inches will then track along the northern 
plains/canadian border tonight and wednesday, then track north 
of lake superior wednesday night into thursday morning. this 
will result in breezy southerly winds over lake michigan on 
wednesday with gale force gusts up to 40 kt. a gale warning is 
in effect for the northern three quarters of the lake.

much weaker north winds will then take hold by thursday 
afternoon into friday as high pressure around 30.4 inches slowly
moves through the region. breezy southerly winds return toward
early next week as a stronger system pushes in from the west.


lmz080-675-777-779-876-878-080315-
lake michigan from michigan city in to st. joseph mi 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 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-
238 pm cdt tue apr 7 2026

wind point wi to holland mi south...

.tonight...northeast winds 5 to 10 kt becoming east late this
evening, then becoming southeast 10 to 20 kt after midnight
increasing to 15 to 25 kt late. waves 1 to 3 ft building to 3 to
5 ft. 
.wednesday...south winds to 30 kt. slight chance of rain showers
in the morning. waves 4 to 7 ft occasionally to 9 ft building to
5 to 8 ft occasionally to 10 ft. 
.wednesday night...south winds to 30 kt becoming southwest. rain
showers likely overnight. waves 5 to 8 ft occasionally to 10 ft. 
.thursday...southwest winds 10 to 20 kt becoming west 10 to
15 kt. waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to
4 ft. 
.thursday night...east winds 5 to 10 kt becoming northeast.
chance of rain showers in the evening, then rain showers
overnight. waves 1 to 2 ft. 
.friday...north winds 5 to 10 kt increasing to 10 to 15 kt. rain
showers in the morning, then chance of rain showers in the
afternoon. waves 1 to 2 ft. 
.friday night...northeast winds 10 to 15 kt diminishing to 5 to
10 kt. waves 1 to 2 ft. 
.saturday...east winds 5 to 10 kt. waves 1 ft or less. 
.sunday...south winds 15 to 25 kt diminishing to 10 to 20 kt.
chance of showers. waves 4 to 6 ft occasionally to 8 ft.  

$$