fzus63 kmkx 310234
glflm 
expires:202603310900;;566746

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
933 pm cdt mon mar 30 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...

a frontal zone should sag south to around a milwaukee wisconsin 
to whitehall michigan line into the overnight hours, with both 
wind flows becoming stronger over the far north and far south
portions of the lake. some 20 to 30 knot gusts may occur over the
northern third and southern third of the lake. showers and 
thunderstorms may occur into tuesday across the lake, with a few 
stronger storms possible at times (particularly near the frontal 
boundary). large hail would be the primary hazard with any 
stronger storms. 

the boundary will sag further south as a cold front tuesday 
afternoon, focusing lingering shower and thunderstorm activity 
over southern lake michigan, before washing it away later 
tuesday. gusty north winds will build in behind the front tuesday
evening into wednesday, with gusts up to 30 knots. winds should
then veer northeast through wednesday. 

high pressure around 30.7 inches will shift from ontario to 
quebec through the late week time period, as low pressure around
29.7 inches approaches from the southwest, allowing winds to 
shift east northeast. will need to watch for gale force gusts 
later this week, particularly thursday, as the low pressure 
system approaches the lake.


lmz673-675-777-779-310900-
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-
933 pm cdt mon mar 30 2026

north point light wi to grand haven mi south...

...severe thunderstorm watch 77 in effect until 3 am cdt
tuesday...

.rest of tonight...south winds 10 to 20 kt increasing to 15 to
25 kt late this evening, then becoming southwest to 30 kt after
midnight becoming west late. chance of rain showers and
thunderstorms. waves 2 to 4 ft building to 4 to 6 ft occasionally
to 8 ft. 
.tuesday...southwest winds to 30 kt veering to west 15 to 25 kt.
chance of rain showers and thunderstorms in the morning, then
rain showers likely with a chance of thunderstorms in the
afternoon. waves 4 to 6 ft occasionally to 8 ft. 
.tuesday night...north winds to 30 kt. chance of rain showers and
thunderstorms in the evening, then chance of rain showers
overnight. waves 4 to 6 ft occasionally to 8 ft building to 5 to
8 ft occasionally to 10 ft. 
.wednesday...northeast winds to 30 kt. chance of rain. waves 6 to
9 ft occasionally to 12 ft. 
.wednesday night...northeast winds to 30 kt becoming east. rain
and snow likely in the evening, then rain and snow overnight.
waves 7 to 10 ft occasionally to 13 ft. 
.thursday...east winds to 30 kt. rain. waves 7 to 10 ft
occasionally to 13 ft. 
.thursday night...south winds 15 to 25 kt becoming southwest.
chance of rain. waves 7 to 10 ft occasionally to 13 ft subsiding
to 6 to 9 ft occasionally to 12 ft. 
.friday...west winds 10 to 20 kt veering to north. waves 5 to
8 ft occasionally to 10 ft subsiding to 3 to 5 ft. 
.saturday...southeast winds 15 to 25 kt becoming southwest. rain
likely. waves 4 to 6 ft occasionally to 8 ft building to 5 to
8 ft occasionally to 10 ft.  

$$

fzus63 kmkx 310234
glflm 
expires:202603310900;;566744

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
933 pm cdt mon mar 30 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...

a frontal zone should sag south to around a milwaukee wisconsin 
to whitehall michigan line into the overnight hours, with both 
wind flows becoming stronger over the far north and far south
portions of the lake. some 20 to 30 knot gusts may occur over the
northern third and southern third of the lake. showers and 
thunderstorms may occur into tuesday across the lake, with a few 
stronger storms possible at times (particularly near the frontal 
boundary). large hail would be the primary hazard with any 
stronger storms. 

the boundary will sag further south as a cold front tuesday 
afternoon, focusing lingering shower and thunderstorm activity 
over southern lake michigan, before washing it away later 
tuesday. gusty north winds will build in behind the front tuesday
evening into wednesday, with gusts up to 30 knots. winds should
then veer northeast through wednesday. 

high pressure around 30.7 inches will shift from ontario to 
quebec through the late week time period, as low pressure around
29.7 inches approaches from the southwest, allowing winds to 
shift east northeast. will need to watch for gale force gusts 
later this week, particularly thursday, as the low pressure 
system approaches the lake.


lmz261-362-364-366-563-565-567-868-310900-
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-
933 pm cdt mon mar 30 2026

sheboygan wi to pentwater mi north...

.rest of tonight...northeast winds 10 to 20 kt increasing to
15 to 25 kt. chance of rain showers and slight chance of
thunderstorms through early evening, then chance of rain showers
and thunderstorms overnight. waves 2 to 4 ft building to 3 to
5 ft. 
.tuesday...northeast winds to 30 kt becoming north 15 to 25 kt.
chance of rain showers and slight chance of thunderstorms. waves
2 to 4 ft. 
.tuesday night...north winds to 30 kt diminishing to 15 to 25 kt.
waves 4 to 7 ft occasionally to 9 ft. 
.wednesday...north winds 15 to 25 kt becoming northeast to 30 kt.
waves 5 to 8 ft occasionally to 10 ft. 
.wednesday night...northeast winds to 30 kt becoming east. chance
of snow and rain in the evening, then chance of snow overnight.
waves 6 to 9 ft occasionally to 12 ft. 
.thursday...east gales to 40 kt becoming northeast gales to
35 kt. snow and rain in the morning, then rain and freezing rain
in the afternoon. waves 7 to 10 ft occasionally to 13 ft. 
.thursday night...east gales to 35 kt veering to west to 30 kt.
rain and freezing rain. waves 7 to 10 ft occasionally to 13 ft. 
.friday...west winds 15 to 25 kt becoming north 10 to 20 kt.
waves 4 to 7 ft occasionally to 9 ft subsiding to 3 to 5 ft. 
.saturday...east winds 15 to 25 kt. rain and freezing rain
likely. waves 4 to 6 ft occasionally to 8 ft building to 4 to
7 ft occasionally to 9 ft.  

$$

fzus63 kmkx 310234
glflm 
expires:202603310900;;566745

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
933 pm cdt mon mar 30 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...

a frontal zone should sag south to around a milwaukee wisconsin 
to whitehall michigan line into the overnight hours, with both 
wind flows becoming stronger over the far north and far south
portions of the lake. some 20 to 30 knot gusts may occur over the
northern third and southern third of the lake. showers and 
thunderstorms may occur into tuesday across the lake, with a few 
stronger storms possible at times (particularly near the frontal 
boundary). large hail would be the primary hazard with any 
stronger storms. 

the boundary will sag further south as a cold front tuesday 
afternoon, focusing lingering shower and thunderstorm activity 
over southern lake michigan, before washing it away later 
tuesday. gusty north winds will build in behind the front tuesday
evening into wednesday, with gusts up to 30 knots. winds should
then veer northeast through wednesday. 

high pressure around 30.7 inches will shift from ontario to 
quebec through the late week time period, as low pressure around
29.7 inches approaches from the southwest, allowing winds to 
shift east northeast. will need to watch for gale force gusts 
later this week, particularly thursday, as the low pressure 
system approaches the lake.


lmz080-669-671-870-872-874-876-878-310900-
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 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-
933 pm cdt mon mar 30 2026

sheboygan wi to pentwater mi south to north point light wi to
grand haven mi...

.rest of tonight...south winds 10 to 20 kt increasing to 15 to
25 kt late this evening, then becoming southwest to 30 kt after
midnight becoming west late. chance of rain showers and
thunderstorms. waves 2 to 4 ft building to 4 to 6 ft occasionally
to 8 ft. 
.tuesday...southwest winds to 30 kt veering to west 15 to 25 kt.
chance of rain showers and thunderstorms in the morning, then
rain showers likely with a chance of thunderstorms in the
afternoon. waves 4 to 6 ft occasionally to 8 ft. 
.tuesday night...north winds to 30 kt. chance of rain showers and
thunderstorms in the evening, then chance of rain showers
overnight. waves 4 to 6 ft occasionally to 8 ft building to 5 to
8 ft occasionally to 10 ft. 
.wednesday...northeast winds to 30 kt. chance of rain. waves 6 to
9 ft occasionally to 12 ft. 
.wednesday night...northeast winds to 30 kt becoming east. rain
and snow likely in the evening, then rain and snow overnight.
waves 7 to 10 ft occasionally to 13 ft. 
.thursday...east winds to 30 kt. rain. waves 7 to 10 ft
occasionally to 13 ft. 
.thursday night...south winds 15 to 25 kt becoming southwest.
chance of rain. waves 7 to 10 ft occasionally to 13 ft subsiding
to 6 to 9 ft occasionally to 12 ft. 
.friday...west winds 10 to 20 kt veering to north. waves 5 to
8 ft occasionally to 10 ft subsiding to 3 to 5 ft. 
.saturday...southeast winds 15 to 25 kt becoming southwest. rain
likely. waves 4 to 6 ft occasionally to 8 ft building to 5 to
8 ft occasionally to 10 ft.  

$$

fzus63 kmkx 310159
glflm 
expires:202603310915;;565420

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
859 pm cdt mon mar 30 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...

a frontal zone should sag south to around a milwaukee wisconsin 
to whitehall michigan line into the overnight hours, with both 
wind flows becoming stronger over the far north and far south
portions of the lake. some 20 to 30 knot gusts may occur over the
northern third and southern third of the lake. showers and 
thunderstorms may occur into tuesday across the lake, with a few 
stronger storms possible at times (particularly near the frontal 
boundary). large hail would be the primary hazard with any 
stronger storms. 

the boundary will sag further south as a cold front tuesday 
afternoon, focusing lingering shower and thunderstorm activity 
over southern lake michigan, before washing it away later 
tuesday. gusty north winds will build in behind the front tuesday
evening into wednesday, with gusts up to 30 knots. winds should
then veer northeast through wednesday. 

high pressure around 30.7 inches will shift from ontario to 
quebec through the late week time period, as low pressure around
29.7 inches approaches from the southwest, allowing winds to 
shift east northeast. will need to watch for gale force gusts 
later this week, particularly thursday, as the low pressure 
system approaches the lake.


lmz080-669-671-673-675-777-779-870-872-874-876-878-310915-
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-
859 pm cdt mon mar 30 2026

sheboygan wi to pentwater mi south...

.rest of tonight...south winds 10 to 20 kt increasing to 15 to
25 kt late this evening, then becoming southwest to 30 kt after
midnight becoming west late. chance of rain showers and
thunderstorms. waves 2 to 4 ft building to 4 to 6 ft occasionally
to 8 ft. 
.tuesday...southwest winds to 30 kt veering to west 15 to 25 kt.
chance of rain showers and thunderstorms in the morning, then
rain showers likely with a chance of thunderstorms in the
afternoon. waves 4 to 6 ft occasionally to 8 ft. 
.tuesday night...north winds to 30 kt. chance of rain showers and
thunderstorms in the evening, then chance of rain showers
overnight. waves 4 to 6 ft occasionally to 8 ft building to 5 to
8 ft occasionally to 10 ft. 
.wednesday...northeast winds to 30 kt. chance of rain. waves 6 to
9 ft occasionally to 12 ft. 
.wednesday night...northeast winds to 30 kt becoming east. rain
and snow likely in the evening, then rain and snow overnight.
waves 7 to 10 ft occasionally to 13 ft. 
.thursday...east winds to 30 kt. rain. waves 7 to 10 ft
occasionally to 13 ft. 
.thursday night...south winds 15 to 25 kt becoming southwest.
chance of rain. waves 7 to 10 ft occasionally to 13 ft subsiding
to 6 to 9 ft occasionally to 12 ft. 
.friday...west winds 10 to 20 kt veering to north. waves 5 to
8 ft occasionally to 10 ft subsiding to 3 to 5 ft. 
.saturday...southeast winds 15 to 25 kt becoming southwest. rain
likely. waves 4 to 6 ft occasionally to 8 ft building to 5 to
8 ft occasionally to 10 ft.  

$$