fzus63 kdtx 170734
glflh 
expires:202509171545;;122344

open lake forecast for lake huron
national weather service detroit/pontiac mi
334 am edt wed sep 17 2025

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...high pressure, 30.20 inches, holds over the eastern
great lakes through the middle of the week, which will continue
to support dry weather and light winds. a second high pressure
system will then drop in from the central canadian provinces,
centering over eastern ontario by the end of the week.


lhz361-171545-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
334 am edt wed sep 17 2025

.today...light and variable winds. waves 2 feet or less. 
.tonight...light and variable winds becoming northwest 5 to
10 knots after midnight. waves 2 feet or less. 
.thursday...northwest winds 5 to 10 knots. waves 2 feet or less. 
.thursday night...northwest winds 5 to 10 knots veering to the
northeast in the late evening and early morning...then increasing
to 10 to 15 knots after midnight. waves 2 feet or less. 
.friday...northeast winds 10 to 15 knots becoming east 5 to
10 knots late in the morning...then becoming light and variable
late in the afternoon becoming east 5 to 10 knots late in the
evening. waves 2 feet or less. 
.saturday...southeast winds 10 to 15 knots becoming east 15 to
20 knots early in the evening...then becoming southeast 10 to
15 knots in the late evening and early morning. waves 3 to
5 feet. 
.sunday...southeast winds 10 to 15 knots decreasing to 5 to
10 knots. a chance of showers. waves 1 to 3 feet. 


$$

fzus63 kdtx 170734
glflh 
expires:202509171545;;122345

open lake forecast for lake huron
national weather service detroit/pontiac mi
334 am edt wed sep 17 2025

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...high pressure, 30.20 inches, holds over the eastern
great lakes through the middle of the week, which will continue
to support dry weather and light winds. a second high pressure
system will then drop in from the central canadian provinces,
centering over eastern ontario by the end of the week.


lhz362-363-171545-
lake huron from presque isle light to sturgeon point mi beyond
5nm off shore-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
334 am edt wed sep 17 2025

.today...light and variable winds. waves 2 feet or less. 
.tonight...light and variable winds becoming west 5 to 10 knots
early in the morning. waves 2 feet or less. 
.thursday...northwest winds 5 to 10 knots becoming north 10 to
15 knots in the late morning and afternoon. waves 2 feet or less.
.thursday night...north winds 10 to 15 knots. waves 1 to 3 feet. 
.friday...northeast winds 10 to 15 knots decreasing to 5 to
10 knots late in the afternoon...then increasing to 10 to
15 knots late in the evening. waves 2 to 4 feet. 
.saturday...east winds 10 to 15 knots. waves 3 to 5 feet
subsiding to 1 to 3 feet in the late evening and early morning. 
.sunday...south winds 10 to 15 knots. a chance of showers until
early morning. waves 2 to 4 feet. 


$$

fzus63 kdtx 170734
glflh 
expires:202509171545;;122346

open lake forecast for lake huron
national weather service detroit/pontiac mi
334 am edt wed sep 17 2025

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...high pressure, 30.20 inches, holds over the eastern
great lakes through the middle of the week, which will continue
to support dry weather and light winds. a second high pressure
system will then drop in from the central canadian provinces,
centering over eastern ontario by the end of the week.


lhz462>464-171545-
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-
334 am edt wed sep 17 2025

.today...light and variable winds. waves 2 feet or less. 
.tonight...light and variable winds. waves 2 feet or less. 
.thursday...light and variable winds becoming northwest 5 to
10 knots in the late morning and afternoon. waves 2 feet or less.
.thursday night...north winds 10 to 15 knots. waves 1 to 3 feet. 
.friday...northeast winds 10 to 15 knots becoming north 15 to
20 knots late in the afternoon...then becoming northeast 10 to
15 knots late in the evening. waves 2 to 4 feet. 
.saturday...east winds 10 to 15 knots decreasing to 5 to 10 knots
early in the evening...then becoming southeast 10 to 15 knots in
the late evening and early morning. waves 2 to 4 feet subsiding
to 1 to 3 feet until early morning. 
.sunday...south winds 10 to 15 knots. a chance of showers in the
late evening and early morning. waves 1 to 3 feet. 


$$

fzus63 kmkx 170825
glflm 
expires:202509171515;;124431

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
325 am cdt wed sep 17 2025

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 30.3 inches in eastern quebec will continue
east today as low pressure around 29.7 inches slowly lifts
northeast into the hudson bay. warm temperatures and light winds
will persist through today and bring a potential for fog tonight.

winds are then expected to increase a bit and shift more easterly
thursday and beyond as another area of low pressure around 29.9 
inches develops across the central plains. as the low lifts into 
the great lakes region this weekend, stronger winds up to around 
25 kt will be possible.


lmz080-669-671-673-675-777-779-870-872-874-876-878-171515-
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-
325 am cdt wed sep 17 2025

sheboygan wi to pentwater mi south...

.today...southeast winds less than 10 kt veering to west early
this afternoon, then becoming 10 to 15 kt late. waves 1 to 2 ft. 
.tonight...west winds 5 to 10 kt becoming south. waves 1 to 2 ft.
.thursday...southeast winds 5 to 10 kt veering to northwest late
in the morning, then becoming north 10 to 20 kt in the afternoon.
waves 1 to 3 ft. 
.thursday night...north winds 10 to 20 kt becoming northeast.
waves 2 to 4 ft. 
.friday...east winds 10 to 15 kt becoming northeast. waves 1 to
3 ft. 
.friday night...northeast winds 10 to 20 kt becoming east 15 to
25 kt. waves 2 to 4 ft building to 4 to 6 ft occasionally to
8 ft. 
.saturday...southeast winds 10 to 20 kt. waves 4 to 6 ft
occasionally to 8 ft subsiding to 3 to 5 ft. 
.sunday...south winds 10 to 20 kt. chance of showers. waves 2 to
4 ft.  

$$

fzus63 kmkx 170825
glflm 
expires:202509171515;;124430

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
325 am cdt wed sep 17 2025

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 30.3 inches in eastern quebec will continue
east today as low pressure around 29.7 inches slowly lifts
northeast into the hudson bay. warm temperatures and light winds
will persist through today and bring a potential for fog tonight.

winds are then expected to increase a bit and shift more easterly
thursday and beyond as another area of low pressure around 29.9 
inches develops across the central plains. as the low lifts into 
the great lakes region this weekend, stronger winds up to around 
25 kt will be possible.


lmz261-362-364-366-563-565-567-868-171515-
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-
325 am cdt wed sep 17 2025

sheboygan wi to pentwater mi north...

.today...south winds 10 to 15 kt becoming southwest. waves 1 to
2 ft. 
.tonight...southwest winds 10 to 15 kt veering to north 5 to
10 kt. chance of showers and slight chance of thunderstorms in
the evening. waves 1 to 2 ft. 
.thursday...northeast winds 10 to 15 kt becoming north 10 to
20 kt. waves 1 to 3 ft. 
.thursday night...northeast winds 10 to 20 kt. waves 1 to 3 ft. 
.friday...east winds 10 to 15 kt becoming northeast 10 to 20 kt.
waves 1 to 3 ft. 
.friday night...east winds 10 to 20 kt becoming southeast. waves
2 to 4 ft building to 3 to 5 ft. 
.saturday...southeast winds 10 to 20 kt. waves 3 to 5 ft. 
.sunday...south winds 10 to 20 kt. chance of showers. waves 2 to
4 ft.  

$$

fzus63 kmqt 170801
glfls 
expires:202509172000;;123122

open lake forecast for lake superior
national weather service marquette mi
401 am edt wed sep 17 2025

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 29.7 inch low moving over hudson bay brings a 30.0 inch trough 
over lake superior today. then a 30.3 inch high over manitoba 
gradually shifts over northern ontario wednesday night through 
friday and across new england on saturday night. this brings 30.2 
inch ridging back over lake superior by friday, weakening to 30.0 
inches by the end of the day saturday. troughing then begins to 
spread over lake superior sunday into the beginning of next week as 
low pressure deepens over the canadian prairie to around 29.5 inches.



lsz264-172000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
401 am edt wed sep 17 2025

.early this morning...southwest winds 5 to 15 knots. waves calm
to 2 feet. 
.today...west winds 5 to 15 knots. waves calm to 2 feet. 
.tonight...north winds 5 to 15 knots becoming northeast 10 to
20 knots late. waves building to 1 to 3 feet. 
.thursday...northeast winds 10 to 20 knots diminishing to 5 to
15 knots late. waves subsiding to calm to 2 feet. 
.thursday night...northeast winds 5 to 15 knots veering east
after midnight. waves calm to 2 feet. 
.friday...east winds 10 to 20 knots. waves building to 1 to
3 feet, then subsiding to calm to 2 feet. 
.friday night...east winds 10 to 20 knots veering southeast after
midnight. waves building to 1 to 3 feet. 
.saturday...southeast winds 15 to 25 knots becoming south 10 to
20 knots. a chance of showers. waves building to 2 to 4 feet,
then subsiding to 1 to 3 feet. 
.sunday...south winds 5 to 15 knots. a chance of showers. waves
subsiding to calm to 2 feet. 

$$

fzus63 kmqt 170801
glfls 
expires:202509172000;;123123

open lake forecast for lake superior
national weather service marquette mi
401 am edt wed sep 17 2025

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 29.7 inch low moving over hudson bay brings a 30.0 inch trough 
over lake superior today. then a 30.3 inch high over manitoba 
gradually shifts over northern ontario wednesday night through 
friday and across new england on saturday night. this brings 30.2 
inch ridging back over lake superior by friday, weakening to 30.0 
inches by the end of the day saturday. troughing then begins to 
spread over lake superior sunday into the beginning of next week as 
low pressure deepens over the canadian prairie to around 29.5 inches.



lsz265-172000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
401 am edt wed sep 17 2025

.early this morning...southwest winds 10 to 20 knots. waves calm
to 2 feet. 
.today...west winds 5 to 15 knots veering north late. waves calm
to 2 feet. 
.tonight...north winds 5 to 15 knots increasing to 10 to 20 knots
late. waves calm to 2 feet. 
.thursday...northeast winds 10 to 20 knots. waves building to
1 to 3 feet, then subsiding to calm to 2 feet. 
.thursday night...northeast winds 5 to 15 knots veering east
after midnight. waves calm to 2 feet. 
.friday...east winds 10 to 20 knots. waves calm to 2 feet. 
.friday night...east winds 10 to 20 knots veering southeast after
midnight. waves calm to 2 feet. 
.saturday...southeast winds 15 to 25 knots becoming south 10 to
20 knots. a chance of showers. waves calm to 2 feet. 
.sunday...south winds 10 to 20 knots diminishing to 5 to
15 knots. a chance of showers. waves calm to 2 feet. 

$$

fzus63 kmqt 170801
glfls 
expires:202509172000;;123124

open lake forecast for lake superior
national weather service marquette mi
401 am edt wed sep 17 2025

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 29.7 inch low moving over hudson bay brings a 30.0 inch trough 
over lake superior today. then a 30.3 inch high over manitoba 
gradually shifts over northern ontario wednesday night through 
friday and across new england on saturday night. this brings 30.2 
inch ridging back over lake superior by friday, weakening to 30.0 
inches by the end of the day saturday. troughing then begins to 
spread over lake superior sunday into the beginning of next week as 
low pressure deepens over the canadian prairie to around 29.5 inches.



lsz266-172000-
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-
401 am edt wed sep 17 2025

.early this morning...south winds 10 to 20 knots. waves 1 to
3 feet subsiding to calm to 2 feet. 
.today...southwest winds 5 to 15 knots veering northwest in the
afternoon. isolated showers through early afternoon. waves calm
to 2 feet. 
.tonight...northwest winds 5 to 15 knots veering north after
midnight, then increasing to 10 to 20 knots late. waves building
to 1 to 3 feet. 
.thursday...north winds 10 to 20 knots. waves subsiding to calm
to 2 feet. 
.thursday night...northeast winds 5 to 15 knots veering east
after midnight. waves calm to 2 feet. 
.friday...east winds 10 to 20 knots. waves calm to 2 feet. 
.friday night...east winds 10 to 20 knots veering southeast after
midnight. waves calm to 2 feet. 
.saturday...southeast winds 15 to 25 knots becoming south 10 to
20 knots. a chance of showers. waves building to 2 to 4 feet,
then subsiding to 1 to 3 feet. 
.sunday...south winds 10 to 20 knots. a chance of showers. waves
subsiding to calm to 2 feet. 

$$

fzus63 kmqt 170801
glfls 
expires:202509172000;;123125

open lake forecast for lake superior
national weather service marquette mi
401 am edt wed sep 17 2025

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 29.7 inch low moving over hudson bay brings a 30.0 inch trough 
over lake superior today. then a 30.3 inch high over manitoba 
gradually shifts over northern ontario wednesday night through 
friday and across new england on saturday night. this brings 30.2 
inch ridging back over lake superior by friday, weakening to 30.0 
inches by the end of the day saturday. troughing then begins to 
spread over lake superior sunday into the beginning of next week as 
low pressure deepens over the canadian prairie to around 29.5 inches.



lsz267-172000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
401 am edt wed sep 17 2025

.early this morning...south winds 10 to 20 knots. waves calm to
2 feet. 
.today...south winds 10 to 20 knots becoming west 5 to 15 knots
in the afternoon, then becoming northwest 10 to 20 knots late.
isolated showers and thunderstorms. waves calm to 2 feet. 
.tonight...northwest winds 10 to 20 knots veering north late.
waves calm to 2 feet. 
.thursday...north winds 10 to 20 knots. waves calm to 2 feet. 
.thursday night...northeast winds 10 to 20 knots veering east
after midnight. waves calm to 2 feet. 
.friday...east winds 5 to 15 knots backing northeast by mid
afternoon. waves calm to 2 feet. 
.friday night...east winds 10 to 20 knots veering southeast after
midnight. waves building to 1 to 3 feet. 
.saturday...southeast winds 15 to 25 knots. a chance of showers.
waves building to 2 to 4 feet, then subsiding to 1 to 3 feet. 
.sunday...southeast winds 10 to 20 knots veering south. a chance
of showers. waves subsiding to calm to 2 feet. 

$$

fzus63 kmqt 170801
glfls 
expires:202509172000;;123120

open lake forecast for lake superior
national weather service marquette mi
401 am edt wed sep 17 2025

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 29.7 inch low moving over hudson bay brings a 30.0 inch trough 
over lake superior today. then a 30.3 inch high over manitoba 
gradually shifts over northern ontario wednesday night through 
friday and across new england on saturday night. this brings 30.2 
inch ridging back over lake superior by friday, weakening to 30.0 
inches by the end of the day saturday. troughing then begins to 
spread over lake superior sunday into the beginning of next week as 
low pressure deepens over the canadian prairie to around 29.5 inches.



lsz162-172000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 am edt wed sep 17 2025 /301 am cdt wed sep 17 2025/

.early this morning...west winds 5 to 15 knots. waves calm to
2 feet. 
.today...west winds 5 to 15 knots backing southwest late. waves
calm to 2 feet. 
.tonight...northeast winds 5 to 15 knots increasing to 10 to
20 knots after midnight. waves building to 1 to 3 feet. 
.thursday...northeast winds 15 to 25 knots veering east in the
afternoon, then diminishing to 10 to 20 knots late. waves
building to 2 to 4 feet. 
.thursday night...east winds 10 to 20 knots. waves subsiding to
calm to 2 feet. 
.friday...east winds 10 to 20 knots increasing to 15 to 25 knots
by mid afternoon. waves building to 2 to 4 feet. 
.friday night...east winds 10 to 20 knots. waves subsiding to
calm to 2 feet. 
.saturday...east winds 10 to 20 knots becoming south 5 to
15 knots. a chance of showers. waves calm to 2 feet. 
.sunday...south winds 5 to 15 knots backing northeast. a chance
of showers. waves calm to 2 feet. 

$$

fzus63 kmqt 170801
glfls 
expires:202509172000;;123121

open lake forecast for lake superior
national weather service marquette mi
401 am edt wed sep 17 2025

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 29.7 inch low moving over hudson bay brings a 30.0 inch trough 
over lake superior today. then a 30.3 inch high over manitoba 
gradually shifts over northern ontario wednesday night through 
friday and across new england on saturday night. this brings 30.2 
inch ridging back over lake superior by friday, weakening to 30.0 
inches by the end of the day saturday. troughing then begins to 
spread over lake superior sunday into the beginning of next week as 
low pressure deepens over the canadian prairie to around 29.5 inches.



lsz263-172000-
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-
401 am edt wed sep 17 2025

.early this morning...west winds 5 to 15 knots. waves calm to
2 feet. 
.today...west winds 5 to 15 knots diminishing to less than
10 knots late. waves calm to 2 feet. 
.tonight...northeast winds 5 to 15 knots increasing to 10 to
20 knots late. waves building to 1 to 3 feet. 
.thursday...northeast winds 10 to 20 knots veering east late.
waves 1 to 3 feet. 
.thursday night...east winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.friday...east winds 10 to 20 knots. waves building to 2 to
4 feet. 
.friday night...east winds 10 to 20 knots becoming southeast 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.saturday...southeast winds 5 to 15 knots veering south. a chance
of showers. waves building to 1 to 3 feet, then subsiding to calm
to 2 feet. 
.sunday...south winds 5 to 15 knots veering southwest. a chance
of showers. waves calm to 2 feet. 

$$