fzus63 kmkx 200756
glflm 
expires:202607201515;;278183

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
256 am 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...

wildfire smoke currently overspreads lake michigan, with areas of
denser smoke reducing visibility to around 1 nautical mile at 
times. a marine dense smoke advisory is in effect across lake 
michigan through early this morning.

low pressure around 29.4 inches tracking southeast across manitoba
into ontario will drag a cold front across the lake tonight. 
south to southwest winds ahead of the front will become gusty. an 
occasional gale force gust will be possible this afternoon and 
evening over the northern half of the lake. strong to severe 
thunderstorms will also be possible this afternoon through tonight
across the entire lake. winds will veer northwest behind the cold
front and remain gusty. then winds veer due north later tuesday 
into tuesday night with gusts to gale force possible. heading into
wednesday winds are expected to diminish becoming light and 
variable by wednesday night as high pressures around 30.1 inches builds
into the great lakes region.


lmz261-362-364-366-563-565-567-868-201515-
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-
256 am cdt mon jul 20 2026

sheboygan wi to pentwater mi north...

...dense smoke advisory in effect until 7 am cdt this morning...

.today...southwest winds 15 to 25 kt becoming south gales to
35 kt. patchy smoke. slight chance of showers and thunderstorms
this afternoon. waves 3 to 5 ft building to 6 to 9 ft
occasionally to 12 ft. 
.tonight...south gales to 40 kt becoming southwest gales to 35 kt
late in the evening, then diminishing to 30 kt after midnight
becoming west late. patchy smoke. showers likely with a chance of
thunderstorms in the evening, then chance of showers overnight.
waves 7 to 10 ft occasionally to 13 ft subsiding to 4 to 7 ft
occasionally to 9 ft. 
.tuesday...west winds to 30 kt becoming north gales to 35 kt.
patchy smoke in the morning. waves 4 to 7 ft occasionally to 9 ft
building to 5 to 8 ft occasionally to 10 ft. 
.tuesday night...north gales to 35 kt. waves 8 to 11 ft
occasionally to 14 ft. 
.wednesday...north gales to 35 kt diminishing to 30 kt. waves
7 to 10 ft occasionally to 13 ft subsiding to 4 to 7 ft
occasionally to 9 ft. 
.wednesday night...west winds 15 to 25 kt becoming southwest 5 to
10 kt. waves 2 to 4 ft subsiding to 1 to 2 ft. 
.thursday...southwest winds 10 to 20 kt increasing to 15 to
25 kt. waves 1 to 3 ft. 
.friday...southwest winds 10 to 20 kt increasing to 15 to 25 kt.
waves 1 to 3 ft.  

$$

fzus63 kmkx 200756
glflm 
expires:202607201515;;278184

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
256 am 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...

wildfire smoke currently overspreads lake michigan, with areas of
denser smoke reducing visibility to around 1 nautical mile at 
times. a marine dense smoke advisory is in effect across lake 
michigan through early this morning.

low pressure around 29.4 inches tracking southeast across manitoba
into ontario will drag a cold front across the lake tonight. 
south to southwest winds ahead of the front will become gusty. an 
occasional gale force gust will be possible this afternoon and 
evening over the northern half of the lake. strong to severe 
thunderstorms will also be possible this afternoon through tonight
across the entire lake. winds will veer northwest behind the cold
front and remain gusty. then winds veer due north later tuesday 
into tuesday night with gusts to gale force possible. heading into
wednesday winds are expected to diminish becoming light and 
variable by wednesday night as high pressures around 30.1 inches builds
into the great lakes region.


lmz080-669-671-673-675-777-779-870-872-874-876-878-201515-
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-
256 am cdt mon jul 20 2026

sheboygan wi to pentwater mi south...

...dense smoke advisory in effect until 7 am cdt this morning...

.today...south winds 10 to 20 kt increasing to 30 kt. patchy
smoke. waves 2 to 4 ft building to 5 to 8 ft occasionally to
10 ft. 
.tonight...south winds to 30 kt becoming west. patchy smoke in
the evening. chance of showers and thunderstorms. waves 5 to 8 ft
occasionally to 10 ft. 
.tuesday...west winds to 30 kt becoming north. patchy smoke in
the morning. waves 4 to 7 ft occasionally to 9 ft. 
.tuesday night...north gales to 35 kt. waves 8 to 12 ft
occasionally to 16 ft. 
.wednesday...north gales to 35 kt diminishing to 30 kt. waves
8 to 11 ft occasionally to 14 ft subsiding to 6 to 9 ft
occasionally to 12 ft. 
.wednesday night...northeast winds to 30 kt becoming northwest
5 to 10 kt. 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 3 ft. 
.friday...southwest winds 10 to 15 kt becoming south 10 to 20 kt.
waves 1 to 3 ft.  

$$