fzus63 kmkx 040900
glflm 
expires:202602041615;;063135

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
300 am cst wed feb 4 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 30.5 inches over far western wisconsin will 
slide southward into iowa today, merging with broad high pressure 
further west. mainly light winds are expected. lake effect snow 
showers remain possible over the southern half of the open waters
through this afternoon. winds will trend west southwesterly 
tonight into thursday, as low pressure around 29.5 inches moves 
from the canadian great plains to western hudson bay. snow is 
possible during the day on thursday, ahead of the developing low.

low pressure will deepen further to near 29.3 inches over central
hudson bay thursday night, ultimately progressing into northern 
quebec during the day on friday. the low will pull a cold front 
across the open waters in the process, resulting in a gusty 
northwest wind shift early friday morning. 

a period of northwesterly gales remains possible during the 
afternoon and evening hours friday, with trends being monitored 
for potential headlines in coming forecasts. areas of snow showers
will continue along and ahead of the passing front thursday night
into early friday morning. 

elevated wave heights will combine with arctic air settling in 
behind the cold front to support areas of moderate freezing spray 
friday afternoon into saturday morning. heavy freezing spray is 
possible, with the need for possible headlines being evaluated in 
coming forecasts. 

winds will briefly taper saturday afternoon, as high pressure
around 30.4 inches crosses lake michigan, prior to increasing 
once more saturday night, as the feature moves east.


lmz261-362-364-366-563-565-567-868-041615-
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-
300 am cst wed feb 4 2026

sheboygan wi to pentwater mi north...

.today...northwest winds 5 to 10 kt increasing to 10 to 15 kt.
waves 1 to 2 ft. 
.tonight...northwest winds 5 to 10 kt becoming southwest 10 to
15 kt. slight chance of snow in the evening. waves 1 to 3 ft. 
.thursday...southwest winds 10 to 20 kt increasing to 15 to
25 kt. snow likely in the morning, then chance of snow in the
afternoon. waves 2 to 4 ft building to 4 to 6 ft occasionally to
8 ft. 
.thursday night...southwest winds 15 to 25 kt becoming west 10 to
20 kt. chance of snow in the evening, then snow likely overnight.
waves 4 to 6 ft occasionally to 8 ft. 
.friday...northwest gales to 35 kt becoming north. chance of snow
in the morning. freezing spray in the afternoon. waves 6 to 9 ft
occasionally to 12 ft building to 10 to 14 ft occasionally to
18 ft. 
.friday night...north gales to 40 kt diminishing to gales to
35 kt. heavy freezing spray. chance of snow. waves 10 to 14 ft
occasionally to 18 ft subsiding to 7 to 10 ft occasionally to
13 ft. 
.saturday...northwest winds to 30 kt becoming west 10 to 20 kt.
waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to 4 ft. 
.sunday...southeast winds 10 to 20 kt becoming south. waves 5 to
8 ft occasionally to 10 ft subsiding to 4 to 7 ft occasionally to
9 ft.  

$$

fzus63 kmkx 040900
glflm 
expires:202602041615;;063136

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
300 am cst wed feb 4 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 30.5 inches over far western wisconsin will 
slide southward into iowa today, merging with broad high pressure 
further west. mainly light winds are expected. lake effect snow 
showers remain possible over the southern half of the open waters
through this afternoon. winds will trend west southwesterly 
tonight into thursday, as low pressure around 29.5 inches moves 
from the canadian great plains to western hudson bay. snow is 
possible during the day on thursday, ahead of the developing low.

low pressure will deepen further to near 29.3 inches over central
hudson bay thursday night, ultimately progressing into northern 
quebec during the day on friday. the low will pull a cold front 
across the open waters in the process, resulting in a gusty 
northwest wind shift early friday morning. 

a period of northwesterly gales remains possible during the 
afternoon and evening hours friday, with trends being monitored 
for potential headlines in coming forecasts. areas of snow showers
will continue along and ahead of the passing front thursday night
into early friday morning. 

elevated wave heights will combine with arctic air settling in 
behind the cold front to support areas of moderate freezing spray 
friday afternoon into saturday morning. heavy freezing spray is 
possible, with the need for possible headlines being evaluated in 
coming forecasts. 

winds will briefly taper saturday afternoon, as high pressure
around 30.4 inches crosses lake michigan, prior to increasing 
once more saturday night, as the feature moves east.


lmz080-669-671-673-675-777-779-870-872-874-876-878-041615-
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-
300 am cst wed feb 4 2026

sheboygan wi to pentwater mi south...

.today...northeast winds 5 to 10 kt becoming northwest. chance of
snow this morning, then slight chance of snow this afternoon.
waves 1 to 3 ft. 
.tonight...northwest winds 5 to 10 kt becoming west 10 to 15 kt.
waves 1 to 3 ft. 
.thursday...southwest winds 10 to 20 kt. chance of snow. waves
2 to 4 ft building to 4 to 7 ft occasionally to 9 ft. 
.thursday night...southwest winds 15 to 25 kt becoming west.
chance of snow and light freezing drizzle overnight. waves 4 to
7 ft occasionally to 9 ft. 
.friday...northwest winds to 30 kt becoming north gales to 35 kt.
chance of snow in the morning. waves 7 to 10 ft occasionally to
13 ft building to 10 to 14 ft occasionally to 18 ft. 
.friday night...north gales to 40 kt diminishing to gales to
35 kt. freezing spray. waves 10 to 14 ft occasionally to 18 ft
subsiding to 8 to 12 ft occasionally to 16 ft. 
.saturday...north winds to 30 kt backing to southwest 10 to
20 kt. waves 5 to 8 ft occasionally to 10 ft subsiding to 3 to
5 ft. 
.sunday...southeast winds 10 to 20 kt. waves 4 to 7 ft
occasionally to 9 ft.  

$$