fzus63 kdtx 181344
glflh 
expires:202603182145;;901286

open lake forecast for lake huron
national weather service detroit/pontiac mi
944 am edt wed mar 18 2026

for waters beyond five nautical miles off shore on lake huron

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...moderate southerly winds return as a warm front lifts
through the central great lakes region. expect a few flurries.
lighter winds on thursday as a weakening cold front approaches
and washes out.


lhz361-362-182145-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
lake huron from presque isle light to sturgeon point mi beyond
5nm off shore-
944 am edt wed mar 18 2026

.rest of today...south winds 15 to 20 knots increasing to 20 to
25 knots with gusts to around 30 knots in the afternoon. freezing
spray in the afternoon. waves 5 to 7 feet building to 6 to 9 feet
late in the afternoon. waves occasionally around 12 feet. 
.tonight...south winds 15 to 20 knots becoming southwest 10 to
15 knots after midnight. scattered snow showers in the evening.
waves 6 to 9 feet. waves occasionally around 12 feet. 
.thursday...west winds 5 to 10 knots. waves 3 to 5 feet subsiding
to 1 to 3 feet in the late morning and afternoon. 
.thursday night...west winds 5 to 10 knots backing to the
southwest after midnight. a chance of rain and snow showers after
midnight. waves 2 feet or less. 
.friday...south winds 10 to 15 knots veering to the north late in
the afternoon. a chance of snow showers. a chance of showers.
waves 1 to 3 feet. 
.saturday...west winds 10 to 15 knots backing to the south until
early evening...then becoming northwest 15 to 20 knots by
midnight. a chance of rain and snow by midnight. waves 3 to
5 feet. 
.sunday...north winds 15 to 20 knots increasing to 20 to
25 knots. a chance of snow and rain early in the morning. waves
6 to 9 feet. waves occasionally around 12 feet. 

wave heights are for ice free areas.

$$

fzus63 kdtx 181344
glflh 
expires:202603182145;;901287

open lake forecast for lake huron
national weather service detroit/pontiac mi
944 am edt wed mar 18 2026

for waters beyond five nautical miles off shore on lake huron

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...moderate southerly winds return as a warm front lifts
through the central great lakes region. expect a few flurries.
lighter winds on thursday as a weakening cold front approaches
and washes out.


lhz363-462>464-182145-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
lake huron from port austin to harbor beach beyond 5nm off shore-
lake huron from harbor beach to port sanilac beyond 5nm off shore-
lake huron from port sanilac to port huron beyond 5nm off shore-
944 am edt wed mar 18 2026

.rest of today...south winds 15 to 20 knots. waves 3 to 5 feet. 
.tonight...south winds 15 to 20 knots decreasing to 10 to
15 knots after midnight. waves 4 to 6 feet. waves occasionally
around 8 feet. 
.thursday...southwest winds 5 to 10 knots. waves 2 to 4 feet
subsiding to 1 to 3 feet in the late morning and afternoon. 
.thursday night...north winds 5 to 10 knots veering to the
southeast by midnight...then veering to the south after midnight.
waves 2 feet or less. 
.friday...south winds 10 to 15 knots decreasing to 5 to 10 knots
late in the afternoon...then becoming northwest 10 to 15 knots
late in the evening. a chance of showers. waves 1 to 3 feet. 
.saturday...northwest winds 10 to 15 knots backing to the
southwest in the late morning and early afternoon...then backing
to the south early in the evening becoming west 15 to 20 knots by
midnight. a chance of rain and snow by midnight. waves 2 to
4 feet. 
.sunday...north winds 15 to 20 knots increasing to 20 to
25 knots. a chance of snow early in the morning. a chance of rain
until afternoon. waves 6 to 9 feet building to 8 to 12 feet by
midnight. waves occasionally around 15 feet. 


$$

fzus63 kmkx 181347
glflm 
expires:202603182130;;901365

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
847 am cdt wed mar 18 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...

light to moderate south-southwest continue this morning as high 
pressure around 30.4 inches moves through the mid-atlanic region 
this morning. will see southwest winds gradually increase today as
low pressure around 29.8 inches progresses through the southern 
canadian prairies into ontario. then a weak cold front will slowly
pass across lake michigan thursday night, bringing northerly 
winds on friday. breezy southerly winds are expected saturday 
ahead of an approaching low, with gusty northerly winds likely 
sunday behind the low and associated cold front. 


lmz261-362-364-366-563-565-567-868-182130-
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-
847 am cdt wed mar 18 2026

sheboygan wi to pentwater mi north...

.rest of today...south winds 15 to 25 kt increasing to 30 kt,
then becoming southwest 15 to 25 kt late. chance of snow. waves
4 to 7 ft occasionally to 9 ft building to 8 to 11 ft
occasionally to 14 ft. 
.tonight...southwest winds 15 to 25 kt diminishing to 10 to 20 kt
late in the evening, then becoming west after midnight
diminishing to 10 to 15 kt late. slight chance of light freezing
rain and snow in the evening, then chance of rain and slight
chance of light freezing rain overnight. waves 6 to 9 ft
occasionally to 12 ft subsiding to 2 to 4 ft. 
.thursday...southwest winds 10 to 15 kt veering to north 5 to
10 kt. waves 1 to 3 ft subsiding to 1 to 2 ft. 
.thursday night...north winds 5 to 10 kt backing to southwest
10 to 15 kt. waves 1 to 2 ft. 
.friday...southwest winds 10 to 15 kt increasing to 10 to 20 kt.
chance of snow in the morning. waves 2 to 4 ft. 
.friday night...northwest winds 10 to 20 kt diminishing to 10 to
15 kt. waves 1 to 3 ft. 
.saturday...south winds 10 to 20 kt. waves 1 to 3 ft. 
.sunday...northeast winds to 30 kt becoming north. waves 6 to
9 ft occasionally to 12 ft.  

$$

fzus63 kmkx 181347
glflm 
expires:202603182130;;901366

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
847 am cdt wed mar 18 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...

light to moderate south-southwest continue this morning as high 
pressure around 30.4 inches moves through the mid-atlanic region 
this morning. will see southwest winds gradually increase today as
low pressure around 29.8 inches progresses through the southern 
canadian prairies into ontario. then a weak cold front will slowly
pass across lake michigan thursday night, bringing northerly 
winds on friday. breezy southerly winds are expected saturday 
ahead of an approaching low, with gusty northerly winds likely 
sunday behind the low and associated cold front. 


lmz080-669-671-673-675-777-779-870-872-874-876-878-182130-
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-
847 am cdt wed mar 18 2026

sheboygan wi to pentwater mi south...

.rest of today...south winds to 30 kt diminishing to 10 to 20 kt.
snow through mid morning. waves 5 to 8 ft occasionally to 10 ft
building to 7 to 10 ft occasionally to 13 ft. 
.tonight...southwest winds 10 to 20 kt diminishing to 10 to
15 kt. chance of rain overnight. waves 5 to 8 ft occasionally to
10 ft subsiding to 2 to 4 ft. 
.thursday...south winds 5 to 10 kt veering to north. chance of
rain. waves 1 to 2 ft. 
.thursday night...north winds 5 to 10 kt veering to south. waves
1 to 2 ft. 
.friday...south winds 10 to 15 kt becoming southwest. waves 1 to
3 ft. 
.friday night...northwest winds 10 to 15 kt becoming north. waves
1 to 3 ft. 
.saturday...south winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 3 ft. 
.sunday...north winds to 30 kt. waves 7 to 10 ft occasionally to
13 ft building to 8 to 11 ft occasionally to 14 ft.  

$$

fzus63 kmqt 181401
glfls 
expires:202603182000;;901634

open lake forecast for lake superior
national weather service marquette mi
1000 am edt wed mar 18 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

a weakening 29.8 inch clipper low continues moving across northern 
ontario today. behind this low, weak ridging of around 30.1 inches 
returns over lake superior on thursday ahead of another clipper low 
moving through the lake thursday night into early friday at around 
29.7 inches. while a subsequent low moves through northern ontario 
towards james bay friday night, yet another low stretches into the 
northern plains around the same time. together, these lows are 
expected to bring about troughing of around around 29.7 inch over 
lake superior saturday. behind the troughing, 30.4 inch ridging 
builds into the great lakes and northern plains to begin next week.



lsz162-182000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 am edt wed mar 18 2026 /900 am cdt wed mar 18 2026/

.rest of today...southwest winds 15 to 25 knots diminishing to
10 to 20 knots late. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.tonight...southwest winds 5 to 15 knots veering northwest late.
a slight chance of rain showers. a slight chance of snow showers
after midnight. waves subsiding to calm to 2 feet. 
.thursday...northeast winds 5 to 15 knots veering southeast in
the afternoon, then veering south late. waves calm to 2 feet. 
.thursday night...south winds 5 to 15 knots veering southwest
after midnight. a chance of snow showers through midnight. a
chance of rain showers. waves calm to 2 feet. 
.friday...north winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. a slight chance of rain showers. waves calm to
2 feet. 
.friday night...west winds 10 to 20 knots. waves calm to 2 feet. 
.saturday...northeast winds 10 to 20 knots increasing to 15 to
25 knots. a chance of rain showers. a chance of snow showers.
waves building to 3 to 5 feet occasionally to 7 feet. 
.sunday...northeast winds 15 to 25 knots becoming north 5 to
15 knots. waves subsiding to calm to 2 feet. 

$$

fzus63 kmqt 181401
glfls 
expires:202603182000;;901635

open lake forecast for lake superior
national weather service marquette mi
1000 am edt wed mar 18 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

a weakening 29.8 inch clipper low continues moving across northern 
ontario today. behind this low, weak ridging of around 30.1 inches 
returns over lake superior on thursday ahead of another clipper low 
moving through the lake thursday night into early friday at around 
29.7 inches. while a subsequent low moves through northern ontario 
towards james bay friday night, yet another low stretches into the 
northern plains around the same time. together, these lows are 
expected to bring about troughing of around around 29.7 inch over 
lake superior saturday. behind the troughing, 30.4 inch ridging 
builds into the great lakes and northern plains to begin next week.



lsz263-182000-
lake superior from saxon harbor wi to upper entrance to portage
canal mi 5nm off shore to the us/canadian border including isle
royale national park-
1000 am edt wed mar 18 2026

.rest of today...southwest winds 10 to 20 knots. a slight chance
of snow showers by late morning. waves 3 to 5 feet occasionally
to 7 feet subsiding to 2 to 4 feet. 
.tonight...west winds 5 to 15 knots veering north late. waves
subsiding to calm to 2 feet. 
.thursday...northeast winds 5 to 15 knots becoming east less than
10 knots in the afternoon, then becoming south 5 to 15 knots
late. waves calm to 2 feet. 
.thursday night...south winds 5 to 15 knots veering southwest
after midnight. a chance of rain showers, possibly mixed with
snow. waves calm to 2 feet. 
.friday...west winds 5 to 15 knots veering northwest by mid
afternoon. a slight chance of rain showers. waves calm to 2 feet.
.friday night...west winds 5 to 15 knots increasing to 10 to
20 knots after midnight. waves building to 1 to 3 feet. 
.saturday...northeast winds 15 to 25 knots increasing to 20 to
30 knots. a chance of rain showers. a chance of snow showers.
waves subsiding to calm to 2 feet, then building to 3 to 6 feet
occasionally to 8 feet. 
.sunday...northeast winds 20 to 30 knots becoming north 10 to
20 knots. waves subsiding to 2 to 4 feet. 

$$

fzus63 kmqt 181401
glfls 
expires:202603182000;;901636

open lake forecast for lake superior
national weather service marquette mi
1000 am edt wed mar 18 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

a weakening 29.8 inch clipper low continues moving across northern 
ontario today. behind this low, weak ridging of around 30.1 inches 
returns over lake superior on thursday ahead of another clipper low 
moving through the lake thursday night into early friday at around 
29.7 inches. while a subsequent low moves through northern ontario 
towards james bay friday night, yet another low stretches into the 
northern plains around the same time. together, these lows are 
expected to bring about troughing of around around 29.7 inch over 
lake superior saturday. behind the troughing, 30.4 inch ridging 
builds into the great lakes and northern plains to begin next week.



lsz264-182000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
1000 am edt wed mar 18 2026

.rest of today...southwest winds 10 to 20 knots. a slight chance
of snow showers. waves 3 to 5 feet occasionally to 7 feet. 
.tonight...west winds 5 to 15 knots veering north late. waves
subsiding to calm to 2 feet. 
.thursday...north winds 5 to 15 knots becoming northwest less
than 10 knots in the afternoon, then becoming south 5 to 15 knots
late. waves calm to 2 feet. 
.thursday night...south winds 5 to 15 knots backing southeast
after midnight. a chance of snow showers, possibly mixed with
rain. waves building to 1 to 3 feet. 
.friday...northeast winds 5 to 15 knots. a slight chance of rain
showers. waves subsiding to calm to 2 feet. 
.friday night...west winds 10 to 20 knots increasing to 15 to
25 knots after midnight. waves building to 1 to 3 feet. 
.saturday...north winds 15 to 25 knots becoming northeast 20 to
30 knots. a chance of rain showers. a chance of snow showers.
freezing spray. waves building to 3 to 6 feet occasionally to
8 feet. 
.sunday...northeast winds 20 to 30 knots becoming north 10 to
20 knots. freezing spray. waves subsiding to 2 to 4 feet. 

$$

fzus63 kmqt 181401
glfls 
expires:202603182000;;901637

open lake forecast for lake superior
national weather service marquette mi
1000 am edt wed mar 18 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

a weakening 29.8 inch clipper low continues moving across northern 
ontario today. behind this low, weak ridging of around 30.1 inches 
returns over lake superior on thursday ahead of another clipper low 
moving through the lake thursday night into early friday at around 
29.7 inches. while a subsequent low moves through northern ontario 
towards james bay friday night, yet another low stretches into the 
northern plains around the same time. together, these lows are 
expected to bring about troughing of around around 29.7 inch over 
lake superior saturday. behind the troughing, 30.4 inch ridging 
builds into the great lakes and northern plains to begin next week.



lsz265-182000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
1000 am edt wed mar 18 2026

.rest of today...south winds 15 to 25 knots veering southwest in
the afternoon, then diminishing to 10 to 20 knots late. a slight
chance of snow showers by late morning. waves 2 to 4 feet
subsiding to calm to 2 feet. 
.tonight...west winds 10 to 20 knots veering northwest late.
waves calm to 2 feet. 
.thursday...north winds 10 to 20 knots veering south late. waves
calm to 2 feet. 
.thursday night...south winds 10 to 20 knots. a chance of rain
and snow showers. waves calm to 2 feet. 
.friday...west winds 10 to 20 knots veering northwest by mid
afternoon. a slight chance of rain showers. waves calm to 2 feet.
.friday night...west winds 15 to 25 knots. waves building to 1 to
3 feet. 
.saturday...north winds 20 to 30 knots veering northeast. a
chance of snow showers. waves building to 5 to 8 feet
occasionally to 10 feet. 
.sunday...north winds 20 to 30 knots diminishing to 15 to
25 knots. freezing spray. waves subsiding to 3 to 6 feet
occasionally to 8 feet. 

$$

fzus63 kmqt 181401
glfls 
expires:202603182000;;901638

open lake forecast for lake superior
national weather service marquette mi
1000 am edt wed mar 18 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

a weakening 29.8 inch clipper low continues moving across northern 
ontario today. behind this low, weak ridging of around 30.1 inches 
returns over lake superior on thursday ahead of another clipper low 
moving through the lake thursday night into early friday at around 
29.7 inches. while a subsequent low moves through northern ontario 
towards james bay friday night, yet another low stretches into the 
northern plains around the same time. together, these lows are 
expected to bring about troughing of around around 29.7 inch over 
lake superior saturday. behind the troughing, 30.4 inch ridging 
builds into the great lakes and northern plains to begin next week.



lsz266-182000-
lake superior east of a line from manitou island to marquette mi
and west of a line from grand marais mi to the us/canadian border
beyond 5nm from shore-
1000 am edt wed mar 18 2026

.rest of today...south winds 20 to 30 knots becoming southwest
10 to 20 knots late. freezing spray by late morning. a chance of
snow showers. waves 4 to 7 feet occasionally to 9 feet subsiding
to 3 to 5 feet occasionally to 7 feet. 
.tonight...southwest winds 10 to 20 knots veering northwest late.
waves subsiding to calm to 2 feet. 
.thursday...north winds 10 to 20 knots backing northwest in the
afternoon, then becoming west 5 to 15 knots late. waves calm to
2 feet. 
.thursday night...south winds 5 to 15 knots increasing to 15 to
25 knots after midnight. a chance of snow showers, possibly mixed
with rain through midnight, then snow showers, possibly mixed
with rain after midnight. waves building to 1 to 3 feet. 
.friday...south winds 15 to 25 knots becoming northwest 10 to
20 knots by mid afternoon. a chance of snow showers through early
afternoon. a chance of rain showers. waves subsiding to calm to
2 feet. 
.friday night...northwest winds 15 to 25 knots becoming west
20 to 30 knots after midnight. waves building to 3 to 5 feet
occasionally to 7 feet. 
.saturday...southwest winds 20 to 30 knots becoming northeast
gales to 35 knots. a chance of snow showers. waves building to
3 to 6 feet occasionally to 8 feet. 
.sunday...northeast winds 20 to 30 knots becoming north 15 to
25 knots. freezing spray. waves subsiding to 3 to 6 feet
occasionally to 8 feet, then building to 4 to 7 feet occasionally
to 9 feet. 

$$

fzus63 kmqt 181401
glfls 
expires:202603182000;;901639

open lake forecast for lake superior
national weather service marquette mi
1000 am edt wed mar 18 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

a weakening 29.8 inch clipper low continues moving across northern 
ontario today. behind this low, weak ridging of around 30.1 inches 
returns over lake superior on thursday ahead of another clipper low 
moving through the lake thursday night into early friday at around 
29.7 inches. while a subsequent low moves through northern ontario 
towards james bay friday night, yet another low stretches into the 
northern plains around the same time. together, these lows are 
expected to bring about troughing of around around 29.7 inch over 
lake superior saturday. behind the troughing, 30.4 inch ridging 
builds into the great lakes and northern plains to begin next week.



lsz267-182000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
1000 am edt wed mar 18 2026

.rest of today...south winds 20 to 30 knots veering southwest
late. a chance of snow showers. waves 3 to 6 feet occasionally to
8 feet. 
.tonight...southwest winds 15 to 25 knots diminishing to 10 to
20 knots after midnight, then veering northwest late. a slight
chance of snow showers. waves subsiding to calm to 2 feet. 
.thursday...northwest winds 10 to 20 knots becoming west 5 to
15 knots late. waves calm to 2 feet. 
.thursday night...south winds 5 to 15 knots becoming southeast
10 to 20 knots after midnight. a chance of snow showers through
midnight, then snow showers likely after midnight. waves building
to 1 to 3 feet. 
.friday...southeast winds 10 to 20 knots veering northwest by mid
afternoon. a chance of rain and snow showers. waves subsiding to
calm to 2 feet. 
.friday night...northwest winds 10 to 20 knots becoming west
15 to 25 knots after midnight. a chance of snow showers. waves
building to 3 to 5 feet occasionally to 7 feet. 
.saturday...south winds 15 to 25 knots becoming northeast 20 to
30 knots. a chance of rain showers. a chance of snow showers.
freezing spray. waves building to 3 to 6 feet occasionally to
8 feet. 
.sunday...northeast winds 20 to 30 knots becoming north 10 to
20 knots. freezing spray. waves subsiding to 2 to 4 feet. 

$$