fzus61 kbuf 211502
glflo 
expires:202511212200;;256285

open lake forecast for lake ontario
national weather service buffalo ny
1002 am est fri nov 21 2025

for waters beyond five nautical miles of shore on lake ontario

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 29.2 inch surface low near james bay will swing a cold 
front across the lake this afternoon, with a 30.1 inch high building 
over the ohio valley and lower great lakes saturday. a 29.5 inch low 
will then move from northern ontario to james bay sunday, sending 
its cold front across the lake through the afternoon hours. a 30.2 
inch high is then forecast to build across the ohio valley monday. 
on tuesday a 29.5 inch low to the north of lake superior will swing 
a cold front across the lake by tuesday night.


loz062-212200-
lake ontario open waters from the niagara river to hamlin beach-
1002 am est fri nov 21 2025

.rest of today...west winds 15 to 25 knots. waves 3 to 6 feet. 
.tonight...northwest winds 10 to 15 knots. waves 2 to 4 feet
subsiding to 1 to 3 feet. 
.saturday...northwest winds 5 to 15 knots becoming west. waves
1 to 2 feet. 
.saturday night...northwest winds 5 to 15 knots becoming
southwest. waves 1 to 2 feet. 
.sunday...southwest winds 15 to 20 knots becoming west 10 to
15 knots. waves 2 to 4 feet building to 3 to 5 feet, then
subsiding to 2 to 4 feet. 
.monday...west winds 5 to 10 knots becoming southeast. a chance
of showers monday night. waves 1 to 3 feet subsiding to 1 foot or
less. 
.tuesday...southeast winds 10 to 15 knots becoming southwest.
showers. waves 1 to 2 feet. 

$$

fzus61 kbuf 211502
glflo 
expires:202511212200;;256287

open lake forecast for lake ontario
national weather service buffalo ny
1002 am est fri nov 21 2025

for waters beyond five nautical miles of shore on lake ontario

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 29.2 inch surface low near james bay will swing a cold 
front across the lake this afternoon, with a 30.1 inch high building 
over the ohio valley and lower great lakes saturday. a 29.5 inch low 
will then move from northern ontario to james bay sunday, sending 
its cold front across the lake through the afternoon hours. a 30.2 
inch high is then forecast to build across the ohio valley monday. 
on tuesday a 29.5 inch low to the north of lake superior will swing 
a cold front across the lake by tuesday night.


loz064-065-212200-
lake ontario open waters from sodus bay to the saint lawrence
river-
1002 am est fri nov 21 2025

.rest of today...southwest winds 15 to 25 knots becoming west. a
chance of showers late this morning. waves 4 to 7 feet. waves
occasionally around 9 feet. 
.tonight...west winds 15 to 20 knots becoming northwest 10 to
15 knots. waves 3 to 6 feet subsiding to 1 to 3 feet. 
.saturday...northwest winds 10 to 15 knots. waves 1 to 3 feet. 
.saturday night...northwest winds 5 to 10 knots becoming
southwest. waves 2 feet or less. 
.sunday...southwest winds 15 to 20 knots becoming northwest. a
chance of rain showers. waves 1 to 3 feet building to 3 to
6 feet. 
.monday...west winds 5 to 15 knots becoming southeast. waves 2 to
4 feet subsiding to 1 to 3 feet. 
.tuesday...southeast winds 15 to 20 knots becoming south.
showers. waves 1 to 3 feet building to 2 to 4 feet. 

$$

fzus61 kbuf 211502
glflo 
expires:202511212200;;256286

open lake forecast for lake ontario
national weather service buffalo ny
1002 am est fri nov 21 2025

for waters beyond five nautical miles of shore on lake ontario

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 29.2 inch surface low near james bay will swing a cold 
front across the lake this afternoon, with a 30.1 inch high building 
over the ohio valley and lower great lakes saturday. a 29.5 inch low 
will then move from northern ontario to james bay sunday, sending 
its cold front across the lake through the afternoon hours. a 30.2 
inch high is then forecast to build across the ohio valley monday. 
on tuesday a 29.5 inch low to the north of lake superior will swing 
a cold front across the lake by tuesday night.


loz063-212200-
lake ontario open waters from hamlin beach to sodus bay-
1002 am est fri nov 21 2025

.rest of today...west winds 15 to 25 knots. a chance of showers
late this morning. waves 3 to 6 feet building to 4 to 7 feet.
waves occasionally around 9 feet. 
.tonight...northwest winds 15 to 20 knots diminishing to 10 to
15 knots. waves 3 to 6 feet subsiding to 2 to 4 feet. 
.saturday...northwest winds 10 to 15 knots. waves 1 to 3 feet. 
.saturday night...northwest winds 5 to 15 knots becoming
southwest. waves 1 to 2 feet. 
.sunday...southwest winds 15 to 20 knots becoming west. a chance
of rain showers during the day. waves 1 to 3 feet building to
3 to 5 feet. 
.monday...west winds 5 to 15 knots becoming southeast. waves 2 to
4 feet subsiding to 1 to 2 feet. 
.tuesday...southeast winds 10 to 15 knots becoming south. showers
likely. waves 1 to 3 feet. 

$$

fzus61 kcle 211427
glfle 
expires:202511212115;;254870

open lake forecast for lake erie
national weather service cleveland oh
927 am est fri nov 21 2025

for waters beyond five nautical miles of shore on lake erie

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 cold front will move east across lake erie this morning as high
pressure 30.20 inches building over the great lakes in its wake
late tonight into saturday. a warm front lift across the lake 
late saturday into sunday, followed by another cold front on late 
sunday into early monday.


lez061-168-169-212115-
ripley to buffalo ny extending from 5nm off shoreline to us-
canadian border-geneva-on-the-
lake to conneaut oh beyond 5 nm off shoreline to us-
canadian border-
conneaut oh to ripley ny beyond 5 nm off shoreline to us-
canadian border-
927 am est fri nov 21 2025

.this afternoon...southwest winds 15 to 20 knots becoming west
10 to 15 knots. waves 3 to 5 feet. 
.tonight...west winds 5 to 15 knots becoming north. waves 2 to
4 feet subsiding to 1 to 2 feet. 
.saturday...north winds 5 to 10 knots becoming northwest. waves
1 foot or less. 
.saturday night...west winds 5 to 15 knots becoming southwest
15 to 20 knots. waves 1 to 3 feet. 
.sunday...southwest winds 15 to 20 knots becoming west and
diminishing to around 10 knots. waves 3 to 6 feet subsiding to
2 to 3 feet. 
.monday...southwest winds 5 to 15 knots becoming south. a chance
of rain monday night. waves 2 feet or less. 
.tuesday...south winds 10 to 15 knots becoming southwest 15 to
20 knots. rain. waves 1 to 3 feet building to 2 to 4 feet. 

$$

fzus61 kcle 211427
glfle 
expires:202511212115;;254868

open lake forecast for lake erie
national weather service cleveland oh
927 am est fri nov 21 2025

for waters beyond five nautical miles of shore on lake erie

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 cold front will move east across lake erie this morning as high
pressure 30.20 inches building over the great lakes in its wake
late tonight into saturday. a warm front lift across the lake 
late saturday into sunday, followed by another cold front on late 
sunday into early monday.


lez162>164-212115-
detroit river lt. to maumee bay oh to reno beach oh beyond 5nm
offshoreline to us-canadian border-
reno beach to the islands oh beyond 5nm off shoreline to us-
canadian border-
the islands to vermilion oh beyond 5 nm off shoreline to us-
canadian border-
927 am est fri nov 21 2025

.this afternoon...southwest winds 10 knots or less becoming west.
waves 1 foot or less. 
.tonight...northwest winds 10 knots or less becoming north. a
slight chance of rain early. waves 2 feet or less. 
.saturday...north winds 10 knots or less becoming west. waves
2 feet or less. 
.saturday night...southwest winds 10 knots or less increasing to
10 to 15 knots. waves 2 feet or less. 
.sunday...west winds 15 to 20 knots diminishing to 5 to 15 knots.
waves 1 to 3 feet subsiding to 1 foot or less. 
.monday...south winds 5 to 15 knots becoming southeast. rain
likely monday night. waves 2 feet or less. 
.tuesday...south winds 15 to 20 knots becoming southwest. rain.
waves 1 to 3 feet. 

$$

fzus61 kcle 211427
glfle 
expires:202511212115;;254869

open lake forecast for lake erie
national weather service cleveland oh
927 am est fri nov 21 2025

for waters beyond five nautical miles of shore on lake erie

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 cold front will move east across lake erie this morning as high
pressure 30.20 inches building over the great lakes in its wake
late tonight into saturday. a warm front lift across the lake 
late saturday into sunday, followed by another cold front on late 
sunday into early monday.


lez165>167-212115-
vermilion to avon point oh beyond 5 nm off shoreline to us-
canadian border-
avon point to willowick oh beyond 5 nm off shoreline to us-
canadian border-willowick to geneva-on-the-
lake oh beyond 5nm off shoreline to us-canadian border-
927 am est fri nov 21 2025

.this afternoon...west winds 5 to 15 knots. waves 1 to 3 feet. 
.tonight...northwest winds 5 to 15 knots becoming north. a slight
chance of rain early. waves 2 feet or less. 
.saturday...north winds 5 to 10 knots becoming west. waves 2 feet
or less. 
.saturday night...west winds 5 to 15 knots becoming southwest
15 to 20 knots. waves 2 feet or less building to 2 to 4 feet. 
.sunday...west winds 15 to 20 knots diminishing to 5 to 15 knots.
waves 3 to 5 feet subsiding to 2 feet or less. 
.monday...south winds 5 to 15 knots becoming southeast. rain
likely monday night. waves 1 to 3 feet. 
.tuesday...south winds 15 to 20 knots becoming southwest. rain.
waves 2 to 4 feet building to 3 to 5 feet, then subsiding to 2 to
4 feet. 

$$

fzus63 kdtx 211435
glfsc 
expires:202511212300;;255060

lake st clair forecast
national weather service detroit/pontiac mi
935 am est fri nov 21 2025

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 weak cold front, 29.90 inches, tracks across the
region early this morning, supporting moderate west-northwest
winds through the day. high pressure, 30.10 inches, then slides
across the central great lakes to close out the week.


lcz460-212300-
lake st clair-
935 am est fri nov 21 2025

.rest of today...west winds 5 to 10 knots. partly sunny. patchy fog
late in the morning. waves 2 feet or less.
.tonight...northwest winds 5 to 10 knots becoming north 10 to 15
knots after midnight. mostly cloudy this evening becoming partly
cloudy. waves 2 feet or less.
.saturday...northwest winds 5 to 10 knots until late afternoon
becoming light and variable. mostly sunny. waves 2 feet or less.
.saturday night...southwest winds 5 to 10 knots increasing to 10 to
15 knots in the late evening and overnight. partly cloudy. waves 2
feet or less.
.sunday...west winds 10 to 15 knots diminishing to 5 to 10 knots in
the evening. mostly clear. waves 2 feet or less.
.monday...southeast winds 10 to 15 knots. partly cloudy. waves 2
feet or less.
.tuesday...southwest winds 15 to 20 knots. light rain. waves 1 to 3
feet.

$$

fzus63 kdtx 211435
glflh 
expires:202511212300;;255054

open lake forecast for lake huron
national weather service detroit/pontiac mi
935 am est fri nov 21 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...a weak cold front, 29.90 inches, tracks across the
region early this morning, supporting moderate west-northwest
winds through the day. high pressure, 30.10 inches, then slides
across the central great lakes to close out the week.


lhz361-362-212300-
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-
935 am est fri nov 21 2025

.rest of today...west winds 10 to 15 knots increasing to 15 to
20 knots in the afternoon. waves 3 to 5 feet. 
.tonight...northwest winds 15 to 20 knots decreasing to 10 to
15 knots after midnight. waves 4 to 6 feet. waves occasionally
around 8 feet. 
.saturday...northwest winds 5 to 10 knots backing to the west
early in the afternoon. waves 2 to 4 feet subsiding to 1 to
3 feet in the late morning and afternoon. 
.saturday night...southwest winds 10 to 15 knots increasing to
15 to 20 knots after midnight. a chance of rain. waves 1 to
3 feet building to 3 to 5 feet in the late evening and overnight.
.sunday...west winds 15 to 20 knots decreasing to 5 to 10 knots.
waves 4 to 6 feet subsiding to 2 to 4 feet late in the evening.
waves occasionally around 8 feet. 
.monday...west winds 5 to 10 knots backing to the south until
early evening...then increasing to 10 to 15 knots in the late
evening and early morning. a chance of rain until early morning.
waves 1 to 3 feet building to 2 to 4 feet in the late evening and
early morning. 
.tuesday...southeast winds 10 to 15 knots. rain until afternoon...
then rain likely until early morning. waves 3 to 5 feet. 


$$

fzus63 kdtx 211435
glflh 
expires:202511212300;;255055

open lake forecast for lake huron
national weather service detroit/pontiac mi
935 am est fri nov 21 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...a weak cold front, 29.90 inches, tracks across the
region early this morning, supporting moderate west-northwest
winds through the day. high pressure, 30.10 inches, then slides
across the central great lakes to close out the week.


lhz363-462-212300-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
lake huron from port austin to harbor beach beyond 5nm off shore-
935 am est fri nov 21 2025

.rest of today...west winds 10 to 15 knots. waves 2 to 4 feet. 
.tonight...northwest winds 10 to 15 knots increasing to 15 to
20 knots late in the evening...then decreasing to 10 to 15 knots
after midnight. waves 3 to 5 feet. 
.saturday...northwest winds 10 to 15 knots decreasing to 5 to
10 knots in the late morning and early afternoon...then backing
to the west early in the afternoon. waves 2 to 4 feet subsiding
to 1 to 3 feet early in the afternoon. 
.saturday night...southwest winds 10 to 15 knots increasing to
15 to 20 knots in the late evening and overnight. waves 1 to
3 feet building to 3 to 5 feet in the late evening and overnight.
.sunday...west winds 15 to 20 knots decreasing to 5 to 10 knots.
waves 3 to 5 feet subsiding to 2 to 4 feet late in the evening. 
.monday...southwest winds 5 to 10 knots becoming south 10 to
15 knots until early morning. rain likely in the late evening and
early morning. waves 1 to 3 feet building to 2 to 4 feet in the
late evening and early morning. 
.tuesday...southeast winds 15 to 20 knots becoming south 10 to
15 knots until early morning. rain until afternoon...then rain
likely early in the evening. a chance of rain in the late evening
and early morning. waves 3 to 5 feet. 


$$

fzus63 kdtx 211435
glflh 
expires:202511212300;;255056

open lake forecast for lake huron
national weather service detroit/pontiac mi
935 am est fri nov 21 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...a weak cold front, 29.90 inches, tracks across the
region early this morning, supporting moderate west-northwest
winds through the day. high pressure, 30.10 inches, then slides
across the central great lakes to close out the week.


lhz463-464-212300-
lake huron from harbor beach to port sanilac beyond 5nm off shore-
lake huron from port sanilac to port huron beyond 5nm off shore-
935 am est fri nov 21 2025

.rest of today...west winds 10 to 15 knots. waves 1 to 3 feet. 
.tonight...northwest winds 10 to 15 knots. waves 1 to 3 feet
building to 2 to 4 feet in the late evening and overnight. 
.saturday...northwest winds 10 to 15 knots decreasing to 5 to
10 knots in the late morning and afternoon. waves 2 to 4 feet
subsiding to 1 to 3 feet early in the afternoon. 
.saturday night...west winds 5 to 10 knots becoming southwest
15 to 20 knots. waves 1 to 3 feet building to 3 to 5 feet after
midnight. 
.sunday...west winds 15 to 20 knots decreasing to 5 to 10 knots.
waves 2 to 4 feet subsiding to 1 to 3 feet late in the afternoon.
.monday...west winds 5 to 10 knots becoming south 10 to 15 knots.
rain likely in the late evening and early morning. waves 1 to
3 feet building to 2 to 4 feet in the late evening and early
morning. 
.tuesday...southeast winds 15 to 20 knots becoming south 10 to
15 knots until early morning. rain until afternoon...then rain
likely until early morning. waves 3 to 5 feet. 


$$

fzus63 kmkx 211501
glflm 
expires:202511212230;;256115

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
901 am cst fri nov 21 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...

light to modest northwest winds continue today through this 
evening as low pressure of 29.5 inches lingers in the hudson bay
area, and high pressure of 30.1 inches builds into the northern 
great plains. high pressure builds overhead overnight tonight 
into saturday, bringing light and variable winds. saturday 
afternoon, expect breezy southwest winds to develop as weak low 
pressure of 29.7 inches progresses through lake superior. winds 
shift northwesterly saturday night into sunday as this low 
pressure system exits to the east and a cold front moves southeast
across the lake. high pressure returns sunday night into monday 
for an additional period of light and variable winds.


lmz080-669-671-673-675-777-779-870-872-874-876-878-212230-
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-
901 am cst fri nov 21 2025

sheboygan wi to pentwater mi south...

.rest of today...northwest winds 10 to 15 kt. waves 1 to 3 ft. 
.tonight...north winds 10 to 15 kt diminishing to 5 to 10 kt.
waves 1 to 3 ft. 
.saturday...northwest winds 5 to 10 kt backing to southwest 10 to
15 kt late in the morning, then increasing to 10 to 20 kt early
in the afternoon becoming southwest 10 to 20 kt late. waves 1 to
3 ft building to 2 to 4 ft. 
.saturday night...southwest winds 15 to 25 kt becoming west 10 to
20 kt. waves 4 to 7 ft occasionally to 9 ft. 
.sunday...northwest winds 10 to 20 kt becoming west 10 to 15 kt.
waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to 4 ft. 
.sunday night...southwest winds 5 to 10 kt becoming south 10 to
15 kt. waves 1 to 3 ft. 
.monday...south winds 10 to 20 kt. chance of rain. waves 2 to
4 ft building to 3 to 5 ft. 
.tuesday...south winds 10 to 20 kt becoming southwest. rain
likely. waves 3 to 5 ft.  

$$

fzus63 kmkx 211501
glflm 
expires:202511212230;;256114

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
901 am cst fri nov 21 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...

light to modest northwest winds continue today through this 
evening as low pressure of 29.5 inches lingers in the hudson bay
area, and high pressure of 30.1 inches builds into the northern 
great plains. high pressure builds overhead overnight tonight 
into saturday, bringing light and variable winds. saturday 
afternoon, expect breezy southwest winds to develop as weak low 
pressure of 29.7 inches progresses through lake superior. winds 
shift northwesterly saturday night into sunday as this low 
pressure system exits to the east and a cold front moves southeast
across the lake. high pressure returns sunday night into monday 
for an additional period of light and variable winds.


lmz261-362-364-366-563-565-567-868-212230-
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-
901 am cst fri nov 21 2025

sheboygan wi to pentwater mi north...

.rest of today...west winds 10 to 20 kt becoming northwest. waves
2 to 4 ft. 
.tonight...northwest winds 10 to 20 kt diminishing to 10 to
15 kt. waves 2 to 4 ft subsiding to 1 to 2 ft. 
.saturday...west winds 5 to 10 kt becoming southwest 10 to 15 kt
late in the morning, then increasing to 10 to 20 kt early in the
afternoon increasing to 15 to 25 kt late. waves 1 to 2 ft
building to 2 to 4 ft. 
.saturday night...southwest winds 15 to 25 kt becoming northwest.
waves 4 to 6 ft occasionally to 8 ft. 
.sunday...northwest winds 10 to 20 kt becoming west. waves 2 to
4 ft subsiding to 1 to 3 ft. 
.sunday night...southwest winds 10 to 15 kt diminishing to 5 to
10 kt. waves 1 to 3 ft. 
.monday...south winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 3 ft building to 2 to 4 ft. 
.tuesday...south winds 10 to 20 kt becoming southwest. rain
likely. waves 3 to 5 ft.  

$$

fzus63 kmqt 210912
glfls 
expires:202511211715;;243737

open lake forecast for lake superior
national weather service marquette mi
412 am est fri nov 21 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...

weak ridging of around 30.1 inches pushes into lake superior today 
as the parent high pressure builds into the western great lakes the 
rest of today into this evening. the ridge then pushes east saturday 
as a 29.8 inch trough moves over lake superior saturday afternoon 
through saturday night. thereafter, a 30.1 inch high pressure 
rebuilds over the great lakes on sunday, sunday night, and even into 
monday ahead of a 29.7 low that arrives over or near lake 
superior by tuesday.



lsz267-211715-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
412 am est fri nov 21 2025

.early this morning...west winds 20 to 30 knots. a slight chance
of rain showers. waves 4 to 7 feet occasionally to 9 feet. 
.today...west winds 20 to 30 knots veering northwest. a chance of
rain showers. a slight chance of snow showers in the afternoon.
waves building to 4 to 8 feet occasionally to 10 feet. 
.tonight...northwest winds 20 to 30 knots diminishing to 10 to
20 knots. a slight chance of snow showers in the evening. waves
subsiding to 1 to 3 feet. 
.saturday...west winds 10 to 20 knots becoming southwest 15 to
25 knots by late morning, then backing south by mid afternoon. a
chance of rain showers, possibly mixed with snow in the
afternoon. waves subsiding to calm to 2 feet, then building to
2 to 4 feet. 
.saturday night...west winds 15 to 25 knots becoming northwest
20 to 30 knots after midnight. a chance of rain showers. waves
building to 3 to 6 feet occasionally to 8 feet. 
.sunday...northwest winds 20 to 30 knots becoming west 15 to
25 knots in the afternoon. waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet. 
.sunday night...west winds 10 to 20 knots. waves subsiding to
calm to 2 feet. 
.monday...south winds 10 to 20 knots backing southeast. rain
showers likely. waves building to 1 to 3 feet. 
.tuesday...southeast winds 15 to 25 knots becoming southwest
20 to 30 knots. rain showers. waves building to 4 to 7 feet
occasionally to 9 feet. 

$$

fzus63 kmqt 210912
glfls 
expires:202511211715;;243734

open lake forecast for lake superior
national weather service marquette mi
412 am est fri nov 21 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...

weak ridging of around 30.1 inches pushes into lake superior today 
as the parent high pressure builds into the western great lakes the 
rest of today into this evening. the ridge then pushes east saturday 
as a 29.8 inch trough moves over lake superior saturday afternoon 
through saturday night. thereafter, a 30.1 inch high pressure 
rebuilds over the great lakes on sunday, sunday night, and even into 
monday ahead of a 29.7 low that arrives over or near lake 
superior by tuesday.



lsz264-211715-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
412 am est fri nov 21 2025

.early this morning...west winds 15 to 25 knots. waves 4 to
7 feet occasionally to 9 feet. 
.today...northwest winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. waves subsiding to 3 to 5 feet
occasionally to 7 feet. 
.tonight...northwest winds 10 to 20 knots diminishing to 5 to
15 knots by midnight, then backing west late. waves subsiding to
calm to 2 feet. 
.saturday...southwest winds 5 to 15 knots becoming south 10 to
20 knots by late morning, then veering southwest by mid
afternoon. a chance of rain showers, possibly mixed with snow.
waves building to 2 to 4 feet. 
.saturday night...west winds 15 to 25 knots veering northwest
after midnight. waves building to 3 to 6 feet occasionally to
8 feet. 
.sunday...west winds 10 to 20 knots. waves subsiding to 1 to
3 feet. 
.sunday night...west winds 5 to 15 knots. waves subsiding to calm
to 2 feet. 
.monday...south winds 5 to 15 knots backing southeast. a chance
of rain showers. waves building to 1 to 3 feet. 
.tuesday...southeast winds 15 to 25 knots becoming west gales to
35 knots. rain showers likely. a chance of snow showers. waves
building to 6 to 9 feet occasionally to 11 feet. 

$$

fzus63 kmqt 210912
glfls 
expires:202511211715;;243733

open lake forecast for lake superior
national weather service marquette mi
412 am est fri nov 21 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...

weak ridging of around 30.1 inches pushes into lake superior today 
as the parent high pressure builds into the western great lakes the 
rest of today into this evening. the ridge then pushes east saturday 
as a 29.8 inch trough moves over lake superior saturday afternoon 
through saturday night. thereafter, a 30.1 inch high pressure 
rebuilds over the great lakes on sunday, sunday night, and even into 
monday ahead of a 29.7 low that arrives over or near lake 
superior by tuesday.



lsz263-211715-
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-
412 am est fri nov 21 2025

.early this morning...west winds 15 to 25 knots. waves 4 to
7 feet occasionally to 9 feet. 
.today...northwest winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. waves subsiding to 1 to 3 feet. 
.tonight...northwest winds 5 to 15 knots backing southwest late.
waves subsiding to calm to 2 feet. 
.saturday...southwest winds 5 to 15 knots increasing to 10 to
20 knots by late morning, then veering west by mid afternoon. a
chance of rain and snow showers. waves building to 2 to 4 feet. 
.saturday night...west winds 10 to 20 knots veering northwest
after midnight. waves building to 3 to 5 feet occasionally to
7 feet, then subsiding to 2 to 4 feet. 
.sunday...west winds 10 to 20 knots. waves subsiding to calm to
2 feet. 
.sunday night...west winds 5 to 15 knots backing southwest after
midnight. waves calm to 2 feet. 
.monday...south winds 5 to 15 knots backing southeast. a chance
of rain showers. waves calm to 2 feet. 
.tuesday...southeast winds 20 to 30 knots becoming west gales to
35 knots. rain showers likely. waves building to 6 to 9 feet
occasionally to 11 feet. 

$$

fzus63 kmqt 210912
glfls 
expires:202511211715;;243735

open lake forecast for lake superior
national weather service marquette mi
412 am est fri nov 21 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...

weak ridging of around 30.1 inches pushes into lake superior today 
as the parent high pressure builds into the western great lakes the 
rest of today into this evening. the ridge then pushes east saturday 
as a 29.8 inch trough moves over lake superior saturday afternoon 
through saturday night. thereafter, a 30.1 inch high pressure 
rebuilds over the great lakes on sunday, sunday night, and even into 
monday ahead of a 29.7 low that arrives over or near lake 
superior by tuesday.



lsz265-211715-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
412 am est fri nov 21 2025

.early this morning...west winds 20 to 30 knots. waves 3 to
6 feet occasionally to 8 feet. 
.today...west winds 20 to 30 knots veering northwest by late
morning, then diminishing to 15 to 25 knots by mid afternoon.
waves subsiding to 2 to 4 feet. 
.tonight...northwest winds 10 to 20 knots backing west late.
waves subsiding to calm to 2 feet. 
.saturday...southwest winds 10 to 20 knots backing south by late
morning, then becoming west 15 to 25 knots by mid afternoon. a
chance of rain showers, possibly mixed with snow in the
afternoon. waves building to 1 to 3 feet. 
.saturday night...west winds 15 to 25 knots becoming northwest
20 to 30 knots after midnight. waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 2 to 4 feet. 
.sunday...west winds 20 to 30 knots diminishing to 15 to 25 knots
in the afternoon. waves subsiding to calm to 2 feet. 
.sunday night...west winds 10 to 20 knots. waves calm to 2 feet. 
.monday...south winds 10 to 20 knots backing southeast. rain
showers likely. waves calm to 2 feet. 
.tuesday...south winds 15 to 25 knots becoming southwest gales to
35 knots. rain showers likely. snow showers likely. waves
building to 3 to 6 feet occasionally to 8 feet. 

$$

fzus63 kmqt 210912
glfls 
expires:202511211715;;243732

open lake forecast for lake superior
national weather service marquette mi
412 am est fri nov 21 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...

weak ridging of around 30.1 inches pushes into lake superior today 
as the parent high pressure builds into the western great lakes the 
rest of today into this evening. the ridge then pushes east saturday 
as a 29.8 inch trough moves over lake superior saturday afternoon 
through saturday night. thereafter, a 30.1 inch high pressure 
rebuilds over the great lakes on sunday, sunday night, and even into 
monday ahead of a 29.7 low that arrives over or near lake 
superior by tuesday.



lsz162-211715-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
412 am est fri nov 21 2025 /312 am cst fri nov 21 2025/

.early this morning...west winds 15 to 25 knots. waves 3 to
5 feet occasionally to 7 feet. 
.today...northwest winds 15 to 25 knots diminishing to 10 to
20 knots. waves subsiding to calm to 2 feet. 
.tonight...northwest winds 5 to 15 knots backing southwest late.
waves calm to 2 feet. 
.saturday...southwest winds 10 to 20 knots increasing to 15 to
25 knots by late morning, then veering west by mid afternoon. a
slight chance of snow showers in the morning. a slight chance of
rain showers. waves building to 2 to 4 feet, then subsiding to
1 to 3 feet. 
.saturday night...west winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. waves subsiding to calm to 2 feet. 
.sunday...west winds 10 to 20 knots backing southwest in the
afternoon. waves calm to 2 feet. 
.sunday night...west winds 5 to 15 knots backing south after
midnight. waves calm to 2 feet. 
.monday...east winds 5 to 15 knots increasing to 10 to 20 knots.
a chance of rain showers. waves calm to 2 feet. 
.tuesday...east winds 15 to 25 knots becoming west 20 to
30 knots. rain showers likely. a chance of snow showers. waves
building to 3 to 6 feet occasionally to 8 feet. 

$$

fzus63 kmqt 210912
glfls 
expires:202511211715;;243736

open lake forecast for lake superior
national weather service marquette mi
412 am est fri nov 21 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...

weak ridging of around 30.1 inches pushes into lake superior today 
as the parent high pressure builds into the western great lakes the 
rest of today into this evening. the ridge then pushes east saturday 
as a 29.8 inch trough moves over lake superior saturday afternoon 
through saturday night. thereafter, a 30.1 inch high pressure 
rebuilds over the great lakes on sunday, sunday night, and even into 
monday ahead of a 29.7 low that arrives over or near lake 
superior by tuesday.



lsz266-211715-
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-
412 am est fri nov 21 2025

.early this morning...west winds 20 to 30 knots. a slight chance
of rain and snow showers. waves 4 to 7 feet occasionally to
9 feet. 
.today...west winds 20 to 30 knots veering northwest. a slight
chance of rain and snow showers in the morning. waves building to
4 to 8 feet occasionally to 10 feet. 
.tonight...northwest winds 15 to 25 knots diminishing to 10 to
20 knots by midnight. waves subsiding to 1 to 3 feet. 
.saturday...southwest winds 10 to 20 knots increasing to 15 to
25 knots. a chance of rain showers, possibly mixed with snow in
the afternoon. waves subsiding to calm to 2 feet, then building
to 2 to 4 feet. 
.saturday night...west winds 15 to 25 knots becoming northwest
20 to 30 knots after midnight. a chance of rain showers in the
evening. waves building to 3 to 6 feet occasionally to 8 feet. 
.sunday...northwest winds 15 to 25 knots becoming west 10 to
20 knots in the afternoon. waves subsiding to 3 to 5 feet
occasionally to 7 feet. 
.sunday night...west winds 10 to 20 knots. waves subsiding to
calm to 2 feet. 
.monday...south winds 10 to 20 knots backing southeast. a chance
of rain showers. waves building to 1 to 3 feet. 
.tuesday...southeast winds 15 to 25 knots becoming southwest
20 to 30 knots. rain showers. waves building to 6 to 9 feet
occasionally to 11 feet. 

$$