fzus63 kmkx 131403
glflm 
expires:202603132130;;603110

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
903 am cdt fri mar 13 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...

strong low pressure around 29.1 inches will cross the northern 
half of lake michigan and into northern lower michigan today.
strong southwest winds will veer west to northwest over the
southern two thirds of the lake, with strong east to southeast
winds becoming northwest this afternoon to the north. 

widespread gale force gusts are expected across the northern half
of the open waters, where a gale warning remains in effect until 
10 pm cdt tonight. even stronger storm force gusts are expected 
across the southern half of the open waters, where a storm 
warning is in effect until 10 pm cdt tonight as well. 

areas of rain and snow will accompany passing low pressure this 
morning and stronger gusts around this precipitation are 
possible. areas of light to occasionally moderate freezing spray 
are possible over northern lake michigan this afternoon.

winds will diminish later tonight through saturday, as high 
pressure around 30.2 inches builds into the northern great plains 
and crosses the open waters. east northeast winds will steadily 
increase saturday night through sunday, as a second low pressure 
system around 29.4 inches forms in the central great plains. the 
low will progress over or just south of the southern lake michigan
sunday night as it deepens toward 29.1 inches, resulting in a 
northerly wind shift. 

winds will shift out of the northwest monday, as the strong low 
continues into ontario. expect another prolonged period of gales, 
if not storm force gusts, across all of the open waters as the 
low approaches and shifts east of lake michigan early sunday 
morning through monday, with headlines becoming necessary within 
the next 12 to 24 hours. 

prolonged snow is expected saturday night through monday, some of
which could be heavy. sleet or freezing rain could mix in with 
snow over southern lake michigan saturday night into sunday. 
freezing spray potential will increase monday behind the departing
low, with areas of moderate to heavy freezing spray possible. 
trends will be monitored in coming forecasts for potential 
headlines.


lmz261-362-364-366-563-565-567-868-132130-
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 am cdt fri mar 13 2026

sheboygan wi to pentwater mi north...

...gale warning in effect through this evening...

.rest of today...southwest to east gales to 45 kt backing to 
north to northwest. snow with rain likely through mid morning, 
then snow with a chance of rain this afternoon. waves 14 to 18 ft 
occasionally to 23 ft. 
.tonight...north gales to 45 kt becoming northwest to 30 kt. 
chance of snow in the evening. waves 14 to 18 ft occasionally to 
23 ft subsiding to 5 to 8 ft occasionally to 10 ft. 
.saturday...northwest winds 10 to 20 kt diminishing to 5 to 10 kt
late in the morning, then becoming northwest 5 to 10 kt early in
the afternoon backing to south late. waves 4 to 6 ft occasionally
to 8 ft subsiding to 1 to 3 ft. 
.saturday night...southeast winds 10 to 15 kt becoming east to
30 kt overnight. chance of snow in the evening, then snow
overnight. waves 1 to 3 ft building to 5 to 8 ft occasionally to
10 ft. 
.sunday...east gales to 35 kt becoming northeast gales to 45 kt
in the afternoon. visibility one quarter mile or less at times.
snow. waves 8 to 12 ft occasionally to 16 ft building to 12 to
16 ft occasionally to 21 ft. 
.sunday night...northeast storm force winds to 50 kt becoming
north. snow. visibility one quarter mile or less at times. waves
18 to 23 ft occasionally to 30 ft. 
.monday...north storm force winds to 50 kt becoming northwest.
snow. visibility one quarter mile or less at times. waves 18 to
23 ft occasionally to 30 ft. 
.tuesday...northwest gales to 40 kt diminishing to 15 to 25 kt.
heavy freezing spray. waves 12 to 16 ft occasionally to 21 ft
subsiding to 6 to 9 ft occasionally to 12 ft.  

$$

fzus63 kmkx 131403
glflm 
expires:202603132130;;603111

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
903 am cdt fri mar 13 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...

strong low pressure around 29.1 inches will cross the northern 
half of lake michigan and into northern lower michigan today.
strong southwest winds will veer west to northwest over the
southern two thirds of the lake, with strong east to southeast
winds becoming northwest this afternoon to the north. 

widespread gale force gusts are expected across the northern half
of the open waters, where a gale warning remains in effect until 
10 pm cdt tonight. even stronger storm force gusts are expected 
across the southern half of the open waters, where a storm 
warning is in effect until 10 pm cdt tonight as well. 

areas of rain and snow will accompany passing low pressure this 
morning and stronger gusts around this precipitation are 
possible. areas of light to occasionally moderate freezing spray 
are possible over northern lake michigan this afternoon.

winds will diminish later tonight through saturday, as high 
pressure around 30.2 inches builds into the northern great plains 
and crosses the open waters. east northeast winds will steadily 
increase saturday night through sunday, as a second low pressure 
system around 29.4 inches forms in the central great plains. the 
low will progress over or just south of the southern lake michigan
sunday night as it deepens toward 29.1 inches, resulting in a 
northerly wind shift. 

winds will shift out of the northwest monday, as the strong low 
continues into ontario. expect another prolonged period of gales, 
if not storm force gusts, across all of the open waters as the 
low approaches and shifts east of lake michigan early sunday 
morning through monday, with headlines becoming necessary within 
the next 12 to 24 hours. 

prolonged snow is expected saturday night through monday, some of
which could be heavy. sleet or freezing rain could mix in with 
snow over southern lake michigan saturday night into sunday. 
freezing spray potential will increase monday behind the departing
low, with areas of moderate to heavy freezing spray possible. 
trends will be monitored in coming forecasts for potential 
headlines.


lmz080-669-671-673-675-777-779-870-872-874-876-878-132130-
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 am cdt fri mar 13 2026

sheboygan wi to pentwater mi south...

...storm warning in effect through this evening...

.rest of today...southwest storm force winds to 50 kt becoming
west storm force winds to 55 kt. chance of rain through mid
morning, then chance of rain and snow this afternoon. waves 15 to
20 ft occasionally to 26 ft. 
.tonight...northwest storm force winds to 50 kt diminishing to
15 to 25 kt. slight chance of snow in the evening. waves 15 to
20 ft occasionally to 26 ft subsiding to 7 to 10 ft occasionally
to 13 ft. 
.saturday...north winds 10 to 15 kt veering to southeast. waves
4 to 7 ft occasionally to 9 ft subsiding to 2 to 4 ft. 
.saturday night...east winds 10 to 20 kt increasing to 30 kt
overnight. snow likely with a chance of rain in the evening, then
rain and snow overnight. waves 2 to 4 ft building to 7 to 10 ft
occasionally to 13 ft. 
.sunday...east gales to 35 kt increasing to gales to 45 kt in the
afternoon. rain and snow. waves 12 to 16 ft occasionally to
21 ft. 
.sunday night...north storm force winds to 50 kt. rain and snow.
waves 18 to 23 ft occasionally to 30 ft. 
.monday...northwest storm force winds to 50 kt. freezing spray.
snow. waves 18 to 23 ft occasionally to 30 ft. 
.tuesday...northwest gales to 35 kt becoming west 15 to 25 kt.
freezing spray. waves 12 to 16 ft occasionally to 21 ft subsiding
to 8 to 11 ft occasionally to 14 ft.  

$$