fzus63 kdtx 150753
glflh 
expires:202509151600;;010380

open lake forecast for lake huron
national weather service detroit/pontiac mi
353 am edt mon sep 15 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, 30.40 inches, will continue to hold
over the eastern great lakes through at least the middle of the
week. the position of this high will maintain some degree of a
light easterly component to surface winds for several days and
will sustain dry weather.


lhz361-362-151600-
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-
353 am edt mon sep 15 2025

.today...east winds 5 to 10 knots. waves 2 feet or less. 
.tonight...light and variable winds. waves 2 feet or less. 
.tuesday...light and variable winds. waves 2 feet or less. 
.tuesday night...light and variable winds. waves 2 feet or less. 
.wednesday...light and variable winds. waves 2 feet or less. 
.thursday...light and variable winds becoming north 5 to 10 knots
early in the evening...then increasing to 10 to 15 knots in the
late evening and early morning. waves 2 feet or less. 
.friday...northeast winds 15 to 20 knots decreasing to 5 to
10 knots early in the evening...then increasing to 10 to 15 knots
in the late evening and early morning. waves 4 to 6 feet. 


$$

fzus63 kdtx 150753
glflh 
expires:202509151600;;010381

open lake forecast for lake huron
national weather service detroit/pontiac mi
353 am edt mon sep 15 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, 30.40 inches, will continue to hold
over the eastern great lakes through at least the middle of the
week. the position of this high will maintain some degree of a
light easterly component to surface winds for several days and
will sustain dry weather.


lhz363-462>464-151600-
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-
353 am edt mon sep 15 2025

.today...east winds 5 to 10 knots in the morning becoming light
and variable...then becoming north 5 to 10 knots late in the
afternoon. waves 2 feet or less. 
.tonight...northeast winds 5 to 10 knots until early morning
becoming light and variable. waves 2 feet or less. 
.tuesday...light and variable winds. waves 2 feet or less. 
.tuesday night...light and variable winds. waves 2 feet or less. 
.wednesday...light and variable winds. waves 2 feet or less. 
.thursday...light and variable winds becoming north 5 to 10 knots
until early morning. waves 2 feet or less. 
.friday...northeast winds 15 to 20 knots. waves 4 to 6 feet. 


$$

fzus63 kmkx 150819
glflm 
expires:202509151530;;012124

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
319 am cdt mon sep 15 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...
 
no major changes to the going synopsis.

weakening low pressure around 29.7 inches over the northern 
great plains will remain nearly stationary through at least
wednesday, with broad high pressure of 30.2 inches dominating 
our weather pattern. light (10kt or less) easterly winds are 
expected during this time over lake michigan, keeping waves in 
the 1 to 3 foot range, and usually on the lower end of that 
range. will need to continue to monitor for areas of dense fog 
development from time to time.


lmz080-671-673-675-777-779-872-874-876-878-151530-
lake michigan from michigan city in to st. joseph mi 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 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-
319 am cdt mon sep 15 2025

port washington wi to whitehall mi south...

.today...southeast winds 10 to 20 kt becoming east 10 to 15 kt
early this afternoon, then becoming north 5 to 10 kt late. waves
1 to 3 ft. 
.tonight...northeast winds 10 to 15 kt veering to southeast.
waves 1 to 2 ft. 
.tuesday...southeast winds 10 to 15 kt backing to north 5 to
10 kt. waves 1 to 2 ft. 
.tuesday night...northeast winds 5 to 10 kt becoming east. waves
1 ft or less. 
.wednesday...southeast winds 5 to 10 kt becoming east. waves 1 ft
or less. 
.wednesday night...northeast winds 5 to 10 kt veering to
southeast. waves 1 ft or less. 
.thursday...east winds 5 to 10 kt backing to north. waves 1 to
2 ft. 
.friday...northeast winds 10 to 15 kt increasing to 10 to 20 kt.
waves 2 to 4 ft.  

$$

fzus63 kmkx 150819
glflm 
expires:202509151530;;012123

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
319 am cdt mon sep 15 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...
 
no major changes to the going synopsis.

weakening low pressure around 29.7 inches over the northern 
great plains will remain nearly stationary through at least
wednesday, with broad high pressure of 30.2 inches dominating 
our weather pattern. light (10kt or less) easterly winds are 
expected during this time over lake michigan, keeping waves in 
the 1 to 3 foot range, and usually on the lower end of that 
range. will need to continue to monitor for areas of dense fog 
development from time to time.


lmz261-362-364-366-563-565-567-669-868-870-151530-
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 sheboygan to port washington wi 5 nm offshore
to mid lake-
lake michigan from pentwater to manistee mi 5 nm offshore to mid
lake-
lake michigan from whitehall to pentwater mi 5 nm offshore to mid
lake-
319 am cdt mon sep 15 2025

port washington wi to whitehall mi north...

.today...southeast winds 10 to 15 kt. waves 1 to 2 ft. 
.tonight...northeast winds 10 to 15 kt veering to southeast.
waves 1 to 2 ft. 
.tuesday...southeast winds 10 to 15 kt becoming south. waves 1 to
2 ft. 
.tuesday night...southeast winds 5 to 10 kt becoming south. waves
1 ft or less. 
.wednesday...south winds 10 to 15 kt becoming southwest. waves
1 ft or less. 
.wednesday night...southwest winds 5 to 10 kt becoming west.
waves 1 ft or less. 
.thursday...north winds 5 to 10 kt increasing to 10 to 15 kt.
waves 1 to 2 ft. 
.friday...northeast winds 10 to 20 kt. waves 2 to 4 ft.  

$$

fzus63 kmqt 150801
glfls 
expires:202509152000;;010860

open lake forecast for lake superior
national weather service marquette mi
401 am edt mon sep 15 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 30.3 inch high over quebec keeps 30.1 to 30.2 inch ridging over 
lake superior through tuesday as it moves to and over new england. a 
29.7 inch low moving through far northern ontario into the hudson 
bay area tuesday night brings troughing of 30.0 inches back to lake 
superior tuesday night through wednesday, before a 30.3 inch high 
stretching from the canadian prairies to northern ontario brings 
30.1 inch ridging back over lake superior wednesday night into 
thursday morning. ridging is expected to strengthen to 30.3 inches 
on friday as the high digs through northern ontario towards the st. 
lawrence seaway.



lsz264-152000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
401 am edt mon sep 15 2025

.early this morning...southeast winds 5 to 15 knots. patchy fog.
waves calm to 2 feet. 
.today...southeast winds 5 to 15 knots. patchy fog through early
afternoon. waves building to 1 to 3 feet. 
.tonight...southeast winds 10 to 20 knots veering south after
midnight, then diminishing to 5 to 15 knots late. waves building
to 2 to 4 feet, then subsiding to 1 to 3 feet. 
.tuesday...south winds 5 to 15 knots. waves subsiding to calm to
2 feet. 
.tuesday night...south winds 5 to 15 knots veering southwest
after midnight. waves calm to 2 feet. 
.wednesday...west winds 5 to 15 knots. waves calm to 2 feet. 
.wednesday night...north winds 5 to 15 knots veering northeast
after midnight. waves calm to 2 feet. 
.thursday...northeast winds 10 to 20 knots. waves building to
1 to 3 feet. 
.friday...east winds 15 to 25 knots becoming southeast 10 to
20 knots. waves building to 2 to 4 feet, then subsiding to calm
to 2 feet. 

$$

fzus63 kmqt 150801
glfls 
expires:202509152000;;010861

open lake forecast for lake superior
national weather service marquette mi
401 am edt mon sep 15 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 30.3 inch high over quebec keeps 30.1 to 30.2 inch ridging over 
lake superior through tuesday as it moves to and over new england. a 
29.7 inch low moving through far northern ontario into the hudson 
bay area tuesday night brings troughing of 30.0 inches back to lake 
superior tuesday night through wednesday, before a 30.3 inch high 
stretching from the canadian prairies to northern ontario brings 
30.1 inch ridging back over lake superior wednesday night into 
thursday morning. ridging is expected to strengthen to 30.3 inches 
on friday as the high digs through northern ontario towards the st. 
lawrence seaway.



lsz265-152000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
401 am edt mon sep 15 2025

.early this morning...southeast winds 10 to 20 knots. patchy fog.
waves calm to 2 feet. 
.today...southeast winds 10 to 20 knots increasing to 15 to
25 knots late. patchy fog through early afternoon. waves building
to 1 to 3 feet. 
.tonight...southeast winds 10 to 20 knots veering south after
midnight, then diminishing to 5 to 15 knots late. waves subsiding
to calm to 2 feet. 
.tuesday...south winds 5 to 15 knots becoming southeast 10 to
20 knots in the afternoon. waves calm to 2 feet. 
.tuesday night...south winds 10 to 20 knots becoming southwest
5 to 15 knots after midnight. waves calm to 2 feet. 
.wednesday...west winds 5 to 15 knots veering north by mid
afternoon. waves calm to 2 feet. 
.wednesday night...north winds 5 to 15 knots. waves calm to
2 feet. 
.thursday...northeast winds 5 to 15 knots increasing to 10 to
20 knots. waves calm to 2 feet. 
.friday...east winds 10 to 20 knots veering southeast. waves
building to 1 to 3 feet, then subsiding to calm to 2 feet. 

$$

fzus63 kmqt 150801
glfls 
expires:202509152000;;010862

open lake forecast for lake superior
national weather service marquette mi
401 am edt mon sep 15 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 30.3 inch high over quebec keeps 30.1 to 30.2 inch ridging over 
lake superior through tuesday as it moves to and over new england. a 
29.7 inch low moving through far northern ontario into the hudson 
bay area tuesday night brings troughing of 30.0 inches back to lake 
superior tuesday night through wednesday, before a 30.3 inch high 
stretching from the canadian prairies to northern ontario brings 
30.1 inch ridging back over lake superior wednesday night into 
thursday morning. ridging is expected to strengthen to 30.3 inches 
on friday as the high digs through northern ontario towards the st. 
lawrence seaway.



lsz266-152000-
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 mon sep 15 2025

.early this morning...southeast winds 5 to 15 knots. patchy fog.
waves calm to 2 feet. 
.today...southeast winds 10 to 20 knots. patchy fog through early
afternoon. waves building to 1 to 3 feet. 
.tonight...south winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. waves building to 2 to 4 feet. 
.tuesday...south winds 10 to 20 knots. waves subsiding to calm to
2 feet. 
.tuesday night...south winds 10 to 20 knots. waves building to
1 to 3 feet, then subsiding to calm to 2 feet. 
.wednesday...southwest winds 5 to 15 knots veering northwest by
mid afternoon. waves calm to 2 feet. 
.wednesday night...north winds 5 to 15 knots. waves calm to
2 feet. 
.thursday...north winds 5 to 15 knots becoming northeast 10 to
20 knots. waves building to 1 to 3 feet. 
.friday...east winds 10 to 20 knots becoming southeast 5 to
15 knots. waves subsiding to calm to 2 feet. 

$$

fzus63 kmqt 150801
glfls 
expires:202509152000;;010863

open lake forecast for lake superior
national weather service marquette mi
401 am edt mon sep 15 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 30.3 inch high over quebec keeps 30.1 to 30.2 inch ridging over 
lake superior through tuesday as it moves to and over new england. a 
29.7 inch low moving through far northern ontario into the hudson 
bay area tuesday night brings troughing of 30.0 inches back to lake 
superior tuesday night through wednesday, before a 30.3 inch high 
stretching from the canadian prairies to northern ontario brings 
30.1 inch ridging back over lake superior wednesday night into 
thursday morning. ridging is expected to strengthen to 30.3 inches 
on friday as the high digs through northern ontario towards the st. 
lawrence seaway.



lsz267-152000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
401 am edt mon sep 15 2025

.early this morning...southeast winds 10 to 20 knots. patchy fog.
waves calm to 2 feet. 
.today...southeast winds 10 to 20 knots. waves calm to 2 feet. 
.tonight...southeast winds 10 to 20 knots veering south after
midnight. patchy fog after midnight. waves building to 1 to
3 feet, then subsiding to calm to 2 feet. 
.tuesday...south winds 10 to 20 knots backing southeast in the
afternoon. patchy fog through early afternoon. waves calm to
2 feet. 
.tuesday night...south winds 10 to 20 knots. waves calm to
2 feet. 
.wednesday...south winds 10 to 20 knots becoming northwest 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.wednesday night...northwest winds 5 to 15 knots veering north
after midnight. waves calm to 2 feet. 
.thursday...north winds 10 to 20 knots becoming northeast 15 to
25 knots. waves building to 1 to 3 feet. 
.friday...northeast winds 10 to 20 knots veering southeast. waves
subsiding to calm to 2 feet. 

$$

fzus63 kmqt 150801
glfls 
expires:202509152000;;010858

open lake forecast for lake superior
national weather service marquette mi
401 am edt mon sep 15 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 30.3 inch high over quebec keeps 30.1 to 30.2 inch ridging over 
lake superior through tuesday as it moves to and over new england. a 
29.7 inch low moving through far northern ontario into the hudson 
bay area tuesday night brings troughing of 30.0 inches back to lake 
superior tuesday night through wednesday, before a 30.3 inch high 
stretching from the canadian prairies to northern ontario brings 
30.1 inch ridging back over lake superior wednesday night into 
thursday morning. ridging is expected to strengthen to 30.3 inches 
on friday as the high digs through northern ontario towards the st. 
lawrence seaway.



lsz162-152000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 am edt mon sep 15 2025 /301 am cdt mon sep 15 2025/

...dense fog advisory in effect until 11 am edt /10 am cdt/ this
morning...

.early this morning...northeast winds 5 to 15 knots. areas of
dense fog. waves 1 to 3 feet. 
.today...east winds 5 to 15 knots becoming northeast 10 to
20 knots in the afternoon. patchy dense fog through early
afternoon. a slight chance of showers and thunderstorms by mid
afternoon. waves subsiding to calm to 2 feet, then building to
1 to 3 feet. 
.tonight...northeast winds 5 to 15 knots veering south late. a
slight chance of showers and thunderstorms through midnight.
waves calm to 2 feet. 
.tuesday...south winds 5 to 15 knots backing southeast late.
waves calm to 2 feet. 
.tuesday night...southwest winds 5 to 15 knots veering west after
midnight. waves calm to 2 feet. 
.wednesday...west winds 5 to 15 knots. waves calm to 2 feet. 
.wednesday night...northeast winds 5 to 15 knots increasing to
10 to 20 knots after midnight. waves calm to 2 feet. 
.thursday...northeast winds 10 to 20 knots. waves building to
2 to 4 feet. 
.friday...east winds 15 to 25 knots diminishing to 10 to
20 knots. waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to calm to 2 feet. 

$$

fzus63 kmqt 150801
glfls 
expires:202509152000;;010859

open lake forecast for lake superior
national weather service marquette mi
401 am edt mon sep 15 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 30.3 inch high over quebec keeps 30.1 to 30.2 inch ridging over 
lake superior through tuesday as it moves to and over new england. a 
29.7 inch low moving through far northern ontario into the hudson 
bay area tuesday night brings troughing of 30.0 inches back to lake 
superior tuesday night through wednesday, before a 30.3 inch high 
stretching from the canadian prairies to northern ontario brings 
30.1 inch ridging back over lake superior wednesday night into 
thursday morning. ridging is expected to strengthen to 30.3 inches 
on friday as the high digs through northern ontario towards the st. 
lawrence seaway.



lsz263-152000-
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 mon sep 15 2025

.early this morning...southeast winds 5 to 15 knots. patchy fog.
waves calm to 2 feet. 
.today...southeast winds 5 to 15 knots backing east in the
afternoon. patchy dense fog through early afternoon. waves calm
to 2 feet. 
.tonight...southeast winds 5 to 15 knots veering south after
midnight. waves building to 1 to 3 feet, then subsiding to calm
to 2 feet. 
.tuesday...south winds 5 to 15 knots. waves calm to 2 feet. 
.tuesday night...south winds 5 to 15 knots veering southwest
after midnight. waves calm to 2 feet. 
.wednesday...west winds 5 to 15 knots. waves calm to 2 feet. 
.wednesday night...north winds 5 to 15 knots veering northeast
after midnight. 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. 
.friday...east winds 15 to 25 knots diminishing to 10 to
20 knots. waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to calm to 2 feet. 

$$