fzus63 kdtx 151939
glflh 
expires:202509160345;;039561

open lake forecast for lake huron
national weather service detroit/pontiac mi
339 pm 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.


lhz361-362-160345-
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-
339 pm edt mon sep 15 2025

.tonight...northeast winds 5 to 10 knots in the evening 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. 
.wednesday night...light and variable winds. waves 2 feet or
less. 
.thursday...light and variable winds becoming northwest 5 to
10 knots late in the morning...then becoming northeast 10 to
15 knots late in the evening. waves 2 feet or less. 
.friday...northeast winds 15 to 20 knots becoming east 5 to
10 knots early in the evening...then increasing to 10 to 15 knots
in the late evening and early morning. waves 3 to 5 feet. 
.saturday...east winds 15 to 20 knots decreasing to 10 to
15 knots until early morning. waves 3 to 5 feet subsiding to 2 to
4 feet in the late evening and early morning. 


$$

fzus63 kdtx 151939
glflh 
expires:202509160345;;039562

open lake forecast for lake huron
national weather service detroit/pontiac mi
339 pm 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>464-160345-
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-
339 pm edt mon sep 15 2025

.tonight...northeast winds 5 to 10 knots veering to the east
early in the morning. waves 2 feet or less. 
.tuesday...light and variable winds. waves 2 feet or less. 
.tuesday night...north winds 5 to 10 knots early in the evening
becoming light and variable. waves 2 feet or less. 
.wednesday...light and variable winds. waves 2 feet or less. 
.wednesday night...light and variable winds. waves 2 feet or
less. 
.thursday...light and variable winds becoming west 5 to 10 knots
late in the morning...then veering to the north late in the
afternoon. waves 2 feet or less. 
.friday...northeast winds 15 to 20 knots. waves 4 to 6 feet. 
.saturday...east winds 15 to 20 knots decreasing to 10 to
15 knots. waves 3 to 5 feet subsiding to 1 to 3 feet in the late
evening and early morning. waves occasionally around 8 feet. 


$$

fzus63 kmkx 151936
glflm 
expires:202509160315;;039520

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
236 pm 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...

high pressure around 30.2 inches will remain over lake michigan
through wednesday as weak low pressure of 29.7 inches slowly lifts
from northern north dakota into the hudson bay today through
wednesday. expect light, generally southeasterly winds through
wednesday. a few areas of fog are possible each night through
wednesday as warm water and high pressure dominate the weather 
pattern. 

expecting winds to become easterly into thursday as low
pressure develops in the central plains, increasing and becoming
northeasterly thursday night into friday as low pressure 
approaches. a few thunderstorms are possible along a warm front
thursday night in the northern half of the open waters.


lmz261-362-364-366-563-565-567-669-868-870-160315-
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-
236 pm cdt mon sep 15 2025

port washington wi to whitehall mi north...

.tonight...northeast winds 10 to 15 kt veering to southeast.
waves 1 to 2 ft. 
.tuesday...south winds 10 to 15 kt. waves 1 to 2 ft. 
.tuesday night...south winds 5 to 10 kt. 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 backing to
southeast. waves 1 ft or less. 
.thursday...northeast winds 5 to 10 kt becoming north 10 to
15 kt. waves 1 to 2 ft. 
.thursday night...northeast winds 10 to 20 kt. waves 2 to 4 ft. 
.friday...northeast winds 10 to 20 kt. waves 2 to 4 ft. 
.saturday...southeast winds 10 to 20 kt. waves 4 to 6 ft
occasionally to 8 ft subsiding to 3 to 5 ft.  

$$

fzus63 kmkx 151936
glflm 
expires:202509160315;;039521

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
236 pm 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...

high pressure around 30.2 inches will remain over lake michigan
through wednesday as weak low pressure of 29.7 inches slowly lifts
from northern north dakota into the hudson bay today through
wednesday. expect light, generally southeasterly winds through
wednesday. a few areas of fog are possible each night through
wednesday as warm water and high pressure dominate the weather 
pattern. 

expecting winds to become easterly into thursday as low
pressure develops in the central plains, increasing and becoming
northeasterly thursday night into friday as low pressure 
approaches. a few thunderstorms are possible along a warm front
thursday night in the northern half of the open waters.


lmz080-671-673-675-777-779-872-874-876-878-160315-
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-
236 pm cdt mon sep 15 2025

port washington wi to whitehall mi south...

.tonight...northeast winds 10 to 15 kt veering to southeast.
waves 1 to 2 ft. 
.tuesday...southeast winds 5 to 10 kt backing to north 10 to
15 kt. waves 1 to 2 ft. 
.tuesday night...north winds 10 to 15 kt becoming east. waves
1 ft or less. 
.wednesday...southeast winds 5 to 10 kt backing to northwest.
waves 1 ft or less. 
.wednesday night...east winds 5 to 10 kt veering to southeast.
waves nearly calm. 
.thursday...south winds 5 to 10 kt backing to northeast. waves
1 ft or less. 
.thursday night...northeast winds 10 to 15 kt becoming east.
waves 2 to 4 ft. 
.friday...east winds 10 to 15 kt becoming northeast. waves 2 to
4 ft. 
.saturday...southeast winds 10 to 20 kt. waves 4 to 6 ft
occasionally to 8 ft subsiding to 3 to 5 ft.  

$$

fzus63 kmqt 152001
glfls 
expires:202509160800;;040361

open lake forecast for lake superior
national weather service marquette mi
401 pm 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 this afternoon will maintain a 30.1 
inch ridge over lake superior through tonight. on tuesday the high 
will begin to weaken 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. the ridge will weaken to 30.1 inches on saturday as 
the high pressure pushes away from the area, into the northeastern 
u.s.



lsz162-160800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt mon sep 15 2025 /301 pm cdt mon sep 15 2025/

.late this afternoon...northeast winds 10 to 20 knots. a slight
chance of showers and thunderstorms. waves 1 to 3 feet. 
.tonight...northeast winds 5 to 15 knots veering east after
midnight, then veering south late. a slight chance of showers and
thunderstorms. waves subsiding to calm to 2 feet. 
.tuesday...south winds 5 to 15 knots. a slight chance of showers
through early afternoon. waves calm to 2 feet. 
.tuesday night...southwest winds 5 to 15 knots veering west late.
a slight chance of showers and thunderstorms after midnight.
waves calm to 2 feet. 
.wednesday...west winds 5 to 15 knots backing southwest by mid
afternoon. a slight chance of showers and thunderstorms. 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
2 to 4 feet. 
.thursday night...northeast winds 10 to 20 knots increasing to
15 to 25 knots after midnight. waves subsiding to 1 to 3 feet,
then 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 1 to 3 feet. 
.saturday...east winds 10 to 20 knots diminishing to 5 to
15 knots. a chance of showers. waves subsiding to calm to 2 feet.

$$

fzus63 kmqt 152001
glfls 
expires:202509160800;;040362

open lake forecast for lake superior
national weather service marquette mi
401 pm 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 this afternoon will maintain a 30.1 
inch ridge over lake superior through tonight. on tuesday the high 
will begin to weaken 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. the ridge will weaken to 30.1 inches on saturday as 
the high pressure pushes away from the area, into the northeastern 
u.s.



lsz263-160800-
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 pm edt mon sep 15 2025

.late this afternoon...east winds 5 to 15 knots. a slight chance
of showers. waves calm to 2 feet. 
.tonight...southeast winds 5 to 15 knots veering south after
midnight. patchy dense fog through midnight. a slight chance of
showers and thunderstorms. waves calm to 2 feet. 
.tuesday...south winds 5 to 15 knots veering southwest in the
afternoon, then backing south late. a slight chance of showers
through early afternoon. waves calm to 2 feet. 
.tuesday night...south winds 5 to 15 knots veering west late. a
slight chance of showers and thunderstorms after midnight. waves
calm to 2 feet. 
.wednesday...west winds 5 to 15 knots. a slight chance of showers
and thunderstorms. 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. 
.thursday night...northeast winds 10 to 20 knots veering east
after midnight. waves subsiding to 1 to 3 feet, then 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. 
.saturday...east winds 5 to 15 knots veering southeast. a chance
of showers. waves building to 1 to 3 feet, then subsiding to calm
to 2 feet. 

$$

fzus63 kmqt 152001
glfls 
expires:202509160800;;040363

open lake forecast for lake superior
national weather service marquette mi
401 pm 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 this afternoon will maintain a 30.1 
inch ridge over lake superior through tonight. on tuesday the high 
will begin to weaken 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. the ridge will weaken to 30.1 inches on saturday as 
the high pressure pushes away from the area, into the northeastern 
u.s.



lsz264-160800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
401 pm edt mon sep 15 2025

.late this afternoon...southeast winds 10 to 20 knots. patchy
dense fog. waves calm to 2 feet 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. a slight chance
of showers after midnight. waves building to 2 to 4 feet, then
subsiding to 1 to 3 feet. 
.tuesday...south winds 5 to 15 knots. a slight chance of showers
through early afternoon. waves subsiding to calm to 2 feet. 
.tuesday night...south winds 5 to 15 knots veering west late. a
slight chance of showers and thunderstorms after midnight. waves
calm to 2 feet. 
.wednesday...west winds 5 to 15 knots. a slight chance of
thunderstorms through early afternoon. a slight chance of
showers. waves calm to 2 feet. 
.wednesday night...north winds 5 to 15 knots. 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 becoming east
10 to 20 knots after midnight. waves building to 2 to 4 feet. 
.friday...east winds 15 to 25 knots becoming southeast 10 to
20 knots. waves subsiding to calm to 2 feet. 
.saturday...southeast winds 10 to 20 knots diminishing to 5 to
15 knots. waves building to 1 to 3 feet, then subsiding to calm
to 2 feet. 

$$

fzus63 kmqt 152001
glfls 
expires:202509160800;;040364

open lake forecast for lake superior
national weather service marquette mi
401 pm 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 this afternoon will maintain a 30.1 
inch ridge over lake superior through tonight. on tuesday the high 
will begin to weaken 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. the ridge will weaken to 30.1 inches on saturday as 
the high pressure pushes away from the area, into the northeastern 
u.s.



lsz265-160800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
401 pm edt mon sep 15 2025

.late this afternoon...southeast winds 15 to 25 knots. waves calm
to 2 feet building to 1 to 3 feet. 
.tonight...southeast winds 15 to 25 knots becoming south 10 to
20 knots after midnight. a slight chance of showers after
midnight. waves subsiding to calm to 2 feet. 
.tuesday...south winds 10 to 20 knots backing southeast in the
afternoon. a slight chance of showers through early afternoon.
waves calm to 2 feet. 
.tuesday night...south winds 10 to 20 knots veering southwest
after midnight, then diminishing to 5 to 15 knots late. a slight
chance of showers and thunderstorms after midnight. waves calm to
2 feet. 
.wednesday...west winds 5 to 15 knots veering north by mid
afternoon. a chance of showers and a slight chance of
thunderstorms. waves calm to 2 feet. 
.wednesday night...north winds 5 to 15 knots. a chance of
showers. waves calm to 2 feet. 
.thursday...northeast 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 10 to 20 knots veering southeast. waves
building to 1 to 3 feet, then subsiding to calm to 2 feet. 
.saturday...southeast winds 10 to 20 knots. a chance of showers.
waves calm to 2 feet. 

$$

fzus63 kmqt 152001
glfls 
expires:202509160800;;040365

open lake forecast for lake superior
national weather service marquette mi
401 pm 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 this afternoon will maintain a 30.1 
inch ridge over lake superior through tonight. on tuesday the high 
will begin to weaken 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. the ridge will weaken to 30.1 inches on saturday as 
the high pressure pushes away from the area, into the northeastern 
u.s.



lsz266-160800-
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 pm edt mon sep 15 2025

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

$$

fzus63 kmqt 152001
glfls 
expires:202509160800;;040366

open lake forecast for lake superior
national weather service marquette mi
401 pm 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 this afternoon will maintain a 30.1 
inch ridge over lake superior through tonight. on tuesday the high 
will begin to weaken 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. the ridge will weaken to 30.1 inches on saturday as 
the high pressure pushes away from the area, into the northeastern 
u.s.



lsz267-160800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
401 pm edt mon sep 15 2025

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

$$