fzus63 kmkx 210203
glflm 
expires:202607210930;;321471

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
903 pm cdt mon jul 20 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 tracking southeast through southern ontario will 
drag a cold front across the lake tonight. gusty south to 
southwest winds ahead of the front are expected, with a few gale 
force gusts possible through this evening over the northern half 
of the lake. 

strong to severe thunderstorms will move east across the northern
portions of the lake through late this evening, with lower 
chances for storms to the south. strong winds and large hail are
possible in northern portions of the lake.

winds will veer northwest behind the cold front and remain gusty 
tuesday morning. winds then veer north later tuesday into
wednesday, with a few gusts to gale force possible. winds are 
expected to gradually weaken by thursday, as high pressure around
30.2 inches builds into the great lakes region. 


lmz261-362-364-366-563-565-567-868-210930-
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-
903 pm cdt mon jul 20 2026

sheboygan wi to pentwater mi north...

.rest of tonight...southwest winds to 30 kt becoming west 15 to
25 kt. showers likely with a chance of thunderstorms through
early evening, then slight chance of thunderstorms overnight.
waves 8 to 11 ft occasionally to 14 ft subsiding to 4 to 6 ft
occasionally to 8 ft. 
.tuesday...west winds 15 to 25 kt becoming northwest to 30 kt
from late morning on. slight chance of showers in the morning.
waves 4 to 6 ft occasionally to 8 ft building to 5 to 8 ft
occasionally to 10 ft. 
.tuesday night...northwest winds to 30 kt becoming north. waves
6 to 9 ft occasionally to 12 ft. 
.wednesday...north winds to 30 kt becoming northwest. waves 5 to
8 ft occasionally to 10 ft subsiding to 4 to 7 ft occasionally to
9 ft. 
.wednesday night...west winds 15 to 25 kt diminishing to 5 to
10 kt overnight. waves 2 to 4 ft subsiding to 1 to 2 ft. 
.thursday...west winds 10 to 20 kt becoming southwest 15 to
25 kt. waves 1 to 2 ft building to 2 to 4 ft. 
.thursday night...southwest winds 15 to 25 kt. waves 2 to 4 ft. 
.friday...southwest winds 10 to 20 kt increasing to 15 to 25 kt.
waves 2 to 4 ft. 
.saturday...southwest winds 15 to 25 kt becoming south to 30 kt.
waves 2 to 4 ft building to 3 to 5 ft.  

$$

fzus63 kmkx 210203
glflm 
expires:202607210930;;321472

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
903 pm cdt mon jul 20 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 tracking southeast through southern ontario will 
drag a cold front across the lake tonight. gusty south to 
southwest winds ahead of the front are expected, with a few gale 
force gusts possible through this evening over the northern half 
of the lake. 

strong to severe thunderstorms will move east across the northern
portions of the lake through late this evening, with lower 
chances for storms to the south. strong winds and large hail are
possible in northern portions of the lake.

winds will veer northwest behind the cold front and remain gusty 
tuesday morning. winds then veer north later tuesday into
wednesday, with a few gusts to gale force possible. winds are 
expected to gradually weaken by thursday, as high pressure around
30.2 inches builds into the great lakes region. 


lmz080-669-671-673-675-777-779-870-872-874-876-878-210930-
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-
903 pm cdt mon jul 20 2026

sheboygan wi to pentwater mi south...

.rest of tonight...southwest winds to 30 kt becoming west. chance
of showers and thunderstorms. waves 5 to 8 ft occasionally to
10 ft. 
.tuesday...west winds 15 to 25 kt becoming northwest to 30 kt.
waves 4 to 7 ft occasionally to 9 ft subsiding to 4 to 6 ft
occasionally to 8 ft. 
.tuesday night...north winds to 30 kt. waves 7 to 10 ft
occasionally to 13 ft. 
.wednesday...north winds to 30 kt. waves 6 to 9 ft occasionally
to 12 ft. 
.wednesday night...north winds to 30 kt backing to west 5 to
10 kt overnight. waves 4 to 7 ft occasionally to 9 ft subsiding
to 2 to 4 ft. 
.thursday...west winds 10 to 15 kt becoming southwest 10 to
20 kt. waves 1 to 2 ft. 
.thursday night...south winds 10 to 20 kt becoming southwest.
waves 1 to 3 ft. 
.friday...southwest winds 10 to 15 kt becoming south 10 to 20 kt.
waves 1 to 3 ft. 
.saturday...southwest winds 10 to 20 kt becoming south 15 to
25 kt. waves 1 to 2 ft building to 2 to 4 ft.  

$$