fzus61 kbuf 181402
glflo 
expires:202609182100;;657460

open lake forecast for lake ontario
national weather service buffalo ny
1002 am edt fri sep 18 2026

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 30.3 inch high will build from northwest ontario 
today to southern quebec saturday, then off the new england coast 
saturday night. a weak 29.9 inch low is then forecast to move east 
across ohio and pennsylvania late saturday night through sunday. 
another 30.3 inch high will then build from northwest ontario sunday 
night to quebec by tuesday and wednesday while gradually 
strengthening to 30.6 inches.


loz063>065-182100-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 am edt fri sep 18 2026

.this afternoon...north winds 10 to 15 knots. waves 1 to 3 feet. 
.tonight...north winds 10 to 15 knots becoming northeast 15 to
20 knots. waves 1 to 3 feet building to 2 to 4 feet. 
.saturday...northeast winds 5 to 15 knots. waves 2 to 4 feet
subsiding to 1 to 3 feet. 
.saturday night...east winds 5 to 10 knots becoming southeast. a
chance of showers overnight. waves 2 feet or less. 
.sunday...east winds 10 to 15 knots becoming northeast and
increasing to 15 to 25 knots. a chance of showers during the day.
waves 1 to 3 feet building to 3 to 6 feet. 
.monday...northeast winds to 30 knots. a chance of showers monday
night. waves 5 to 8 feet. waves occasionally around 10 feet. 
.tuesday...east winds to 30 knots diminishing to 15 to 25 knots.
a chance of showers. waves 5 to 9 feet subsiding to 4 to 7 feet.
waves occasionally around 11 feet. 

$$

fzus61 kbuf 181402
glflo 
expires:202609182100;;657459

open lake forecast for lake ontario
national weather service buffalo ny
1002 am edt fri sep 18 2026

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 30.3 inch high will build from northwest ontario 
today to southern quebec saturday, then off the new england coast 
saturday night. a weak 29.9 inch low is then forecast to move east 
across ohio and pennsylvania late saturday night through sunday. 
another 30.3 inch high will then build from northwest ontario sunday 
night to quebec by tuesday and wednesday while gradually 
strengthening to 30.6 inches.


loz062-182100-
lake ontario open waters from the niagara river to hamlin beach-
1002 am edt fri sep 18 2026

.this afternoon...northeast winds 5 to 15 knots becoming north.
waves 1 to 2 feet. 
.tonight...north winds 10 to 15 knots becoming east 15 to
20 knots. waves 2 feet or less building to 2 to 4 feet. 
.saturday...east winds 15 to 20 knots diminishing to 10 to
15 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.saturday night...east winds 10 to 15 knots. waves 1 to 3 feet. 
.sunday...northeast winds 10 to 15 knots increasing to 15 to
25 knots. waves 1 to 3 feet building to 3 to 6 feet. 
.monday...northeast winds 15 to 25 knots increasing to 30 knots.
a chance of showers monday night. waves 5 to 8 feet building to
7 to 10 feet. waves occasionally around 13 feet. 
.tuesday...northeast winds to 30 knots becoming east. a chance of
showers. waves 7 to 10 feet. waves occasionally around 13 feet. 

$$

fzus61 kcle 181343
glfle 
expires:202609182015;;656951

open lake forecast for lake erie
national weather service cleveland oh
943 am edt fri sep 18 2026

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...
high pressure 30.20 inches will build over lake erie today before 
low pressure 29.80 inches moves east across the southern great lakes 
this weekend. a trough averaging 29.90 inches will linger into early 
next week.


lez164>167-182015-
the islands to vermilion oh beyond 5 nm off shoreline to us-
canadian border-
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-
943 am edt fri sep 18 2026

.this afternoon...northeast winds 15 to 20 knots diminishing to
5 to 15 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.tonight...northeast winds 5 to 15 knots becoming east. waves
1 to 3 feet building to 2 to 4 feet. 
.saturday...east winds 5 to 15 knots. a chance of showers in the
afternoon. waves 1 to 3 feet. 
.saturday night...east winds 5 to 15 knots becoming northeast.
showers likely. waves 1 to 3 feet. 
.sunday...northeast winds 10 to 15 knots increasing to 15 to
25 knots. showers likely during the day. waves 1 to 3 feet
building to 5 to 8 feet. waves occasionally around 10 feet. 
.monday...east winds to 30 knots becoming northeast. a chance of
showers monday night. waves 7 to 11 feet. waves occasionally
around 14 feet. 
.tuesday...northeast winds to 30 knots becoming east. a chance of
showers during the day, then showers likely tuesday night. waves
7 to 11 feet. waves occasionally around 14 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 181343
glfle 
expires:202609182015;;656952

open lake forecast for lake erie
national weather service cleveland oh
943 am edt fri sep 18 2026

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...
high pressure 30.20 inches will build over lake erie today before 
low pressure 29.80 inches moves east across the southern great lakes 
this weekend. a trough averaging 29.90 inches will linger into early 
next week.


lez061-168-169-182015-
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-
943 am edt fri sep 18 2026

.this afternoon...northeast winds 5 to 15 knots. waves 1 to
3 feet. 
.tonight...northeast winds 10 to 15 knots becoming east. waves
1 to 3 feet. 
.saturday...east winds 5 to 15 knots. waves 1 to 3 feet. 
.saturday night...east winds 5 to 15 knots. a chance of showers
in the evening, then showers likely overnight. waves 2 feet or
less. 
.sunday...northeast winds 10 to 15 knots increasing to 15 to
25 knots. a chance of showers during the day. waves 1 to 3 feet
building to 4 to 7 feet. waves occasionally around 9 feet. 
.monday...northeast winds to 30 knots. a chance of showers monday
night. waves 5 to 9 feet. waves occasionally around 11 feet. 
.tuesday...northeast winds to 30 knots becoming east. a chance of
showers during the day, then showers likely tuesday night. waves
5 to 9 feet. waves occasionally around 11 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 181343
glfle 
expires:202609182015;;656950

open lake forecast for lake erie
national weather service cleveland oh
943 am edt fri sep 18 2026

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...
high pressure 30.20 inches will build over lake erie today before 
low pressure 29.80 inches moves east across the southern great lakes 
this weekend. a trough averaging 29.90 inches will linger into early 
next week.


lez162-163-182015-
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-
943 am edt fri sep 18 2026

.this afternoon...northeast winds 10 to 15 knots. waves 1 to
3 feet. 
.tonight...northeast winds 10 to 15 knots becoming east. waves
1 to 2 feet. 
.saturday...east winds around 10 knots. a chance of showers.
waves 1 to 2 feet. 
.saturday night...east winds around 10 knots becoming northeast.
showers with a chance of thunderstorms in the evening, then
showers overnight. waves 2 feet or less. 
.sunday...northeast winds 10 to 15 knots increasing to 15 to
25 knots. showers likely during the day, then a chance of showers
sunday night. waves 1 to 3 feet building to 4 to 7 feet. waves
occasionally around 9 feet. 
.monday...northeast winds to 30 knots. a chance of showers. waves
5 to 9 feet. waves occasionally around 11 feet. 
.tuesday...northeast winds to 30 knots. a chance of showers.
waves 5 to 9 feet. waves occasionally around 11 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 181347
glfsc 
expires:202609182200;;657041

lake st clair forecast
national weather service detroit/pontiac mi
947 am edt fri sep 18 2026

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 tracks north of the great lakes today. a
low pressure system follows a stalled front from the central
plains into the ohio valley this weekend. another area of high
pressure then builds into northern ontario on sunday.


lcz460-182200-
lake st clair-
947 am edt fri sep 18 2026

.rest of today...northeast winds 10 to 15 knots diminishing to 5 to
10 knots early in the afternoon...then increasing to 10 to 15 knots
late in the afternoon. mostly sunny. waves 2 feet or less.
.tonight...northeast winds 15 to 20 knots diminishing to 10 to 15
knots after midnight. partly cloudy this evening becoming mostly
cloudy. waves 1 to 3 feet.
.saturday...east winds 10 to 15 knots. mostly cloudy. a chance of
light showers until late afternoon...then showers likely early in
the afternoon. waves 2 feet or less.
.saturday night...east winds 10 to 15 knots. cloudy. a chance of
light showers ...then light showers likely after midnight. waves 2
feet or less.
.sunday...northeast winds 10 to 15 knots increasing to 20 to 25
knots in the evening. mostly cloudy with a chance of showers. waves
1 to 3 feet.
.monday...northeast winds to 30 knots. mostly cloudy. waves 2 to 4
feet. a small craft advisory may be needed.
.tuesday...northeast winds to 30 knots with gusts to 35 knot gales.
mostly cloudy with a chance of showers. waves 2 to 4 feet.  a gale
warning may be needed.

$$

fzus63 kdtx 181347
glflh 
expires:202609182200;;657035

open lake forecast for lake huron
national weather service detroit/pontiac mi
947 am edt fri sep 18 2026

for waters beyond five nautical miles off shore on lake huron

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

.synopsis...high pressure tracks north of the great lakes today. a
low pressure system follows a stalled front from the central
plains into the ohio valley this weekend. another area of high
pressure then builds into northern ontario on sunday.


lhz361-182200-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
947 am edt fri sep 18 2026

.rest of today...northeast winds 5 to 10 knots in the late
morning and early afternoon becoming light and variable. waves
2 feet or less. 
.tonight...light and variable winds becoming east 5 to 10 knots
early in the morning. waves 2 feet or less. 
.saturday...east winds 5 to 10 knots increasing to 10 to 15 knots
in the late morning and afternoon. waves 1 to 3 feet. 
.saturday night...east winds 5 to 10 knots early in the evening
becoming light and variable. waves 2 feet or less. 
.sunday...northeast winds 5 to 10 knots increasing to 15 to
20 knots with gusts to around 30 knots late in the evening. waves
2 feet or less building to 3 to 5 feet late in the evening. 
.monday...northeast winds 15 to 20 knots becoming east 10 to
15 knots until early evening...then increasing to 15 to 20 knots
with gusts to around 30 knots by midnight. waves 3 to 5 feet
subsiding to 1 to 3 feet early in the evening...then building to
3 to 5 feet by midnight. 
.tuesday...east winds 15 to 20 knots with gusts to around
30 knots decreasing to 10 to 15 knots early in the evening...then
increasing to 15 to 20 knots with gusts to around 30 knots by
midnight. waves 3 to 5 feet. 


$$

fzus63 kdtx 181347
glflh 
expires:202609182200;;657036

open lake forecast for lake huron
national weather service detroit/pontiac mi
947 am edt fri sep 18 2026

for waters beyond five nautical miles off shore on lake huron

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

.synopsis...high pressure tracks north of the great lakes today. a
low pressure system follows a stalled front from the central
plains into the ohio valley this weekend. another area of high
pressure then builds into northern ontario on sunday.


lhz362-363-182200-
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-
947 am edt fri sep 18 2026

.rest of today...northeast winds 10 to 15 knots becoming north
5 to 10 knots late in the afternoon. waves 2 to 4 feet. 
.tonight...northeast winds 5 to 10 knots veering to the east
after midnight. waves 1 to 3 feet. 
.saturday...east winds 10 to 15 knots becoming southeast 5 to
10 knots in the late morning and afternoon. waves 1 to 3 feet. 
.saturday night...east winds 5 to 10 knots. waves 2 feet or less.
.sunday...northeast winds 5 to 10 knots increasing to 20 to
25 knots with gusts to around 30 knots. waves 1 to 3 feet
building to 5 to 7 feet. waves occasionally around 10 feet. 
.monday...northeast winds 15 to 20 knots. gusts to 30 knots early
in the evening. waves 5 to 7 feet. waves occasionally around
10 feet. 
.tuesday...east winds 15 to 20 knots becoming northeast 20 to
25 knots with gusts to 35 knot gales. waves 5 to 7 feet. waves
occasionally around 10 feet. 


$$

fzus63 kdtx 181347
glflh 
expires:202609182200;;657037

open lake forecast for lake huron
national weather service detroit/pontiac mi
947 am edt fri sep 18 2026

for waters beyond five nautical miles off shore on lake huron

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

.synopsis...high pressure tracks north of the great lakes today. a
low pressure system follows a stalled front from the central
plains into the ohio valley this weekend. another area of high
pressure then builds into northern ontario on sunday.


lhz462>464-182200-
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-
947 am edt fri sep 18 2026

.rest of today...north winds 10 to 15 knots. waves 2 to 4 feet. 
.tonight...northeast winds 10 to 15 knots veering to the east
early in the morning. waves 3 to 5 feet subsiding to 1 to 3 feet
after midnight. 
.saturday...east winds 5 to 10 knots becoming southeast 10 to
15 knots in the late morning and afternoon. waves 1 to 3 feet. 
.saturday night...east winds 10 to 15 knots decreasing to 5 to
10 knots after midnight. waves 1 to 3 feet. 
.sunday...northeast winds 10 to 15 knots increasing to 20 to
25 knots. waves 1 to 3 feet building to 5 to 7 feet. waves
occasionally around 10 feet. 
.monday...northeast winds 15 to 20 knots with gusts to around
30 knots becoming east 20 to 25 knots by midnight. waves 4 to
6 feet. 
.tuesday...northeast winds 15 to 20 knots increasing to 20 to
25 knots with gusts to around 30 knots . a chance of showers by
midnight. waves 4 to 6 feet. 


$$

fzus63 kmkx 181359
glflm 
expires:202609182130;;657237

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
859 am cdt fri sep 18 2026

for waters beyond five nautical miles of shore on lake michigan.

waves are provided as a range of significant wave heights, which
is the average of the highest 1/3 of the wave, along with the
average height of the highest 10% of the waves which will
occasionally be encountered.

.synopsis...

low pressure around 29.9 inches will develop near the missouri 
river this afternoon, moving over or just south of waters during 
the day on saturday. winds will veer east southeasterly ahead of 
the low, becoming gusty at times. a few gusts could approach gale
thresholds, particularly tonight and saturday morning. areas of 
widespread showers and thunderstorms will accompany the passing 
area of low pressure tonight through at least saturday night.

winds will trend northeasterly sunday through monday night, as 
the aforementioned area of low pressure slowly moves into the ohio
river valley. additional rain showers will accompany the passing 
low. high pressure around 30.5 inches will concurrently slide 
into ontario from the canadian great plains, with gusty winds
expected through most of the late weekend to early week time 
frame. similar to saturday, gusts could occasionally approach gale
thresholds during the sunday into monday night time frame. winds 
will steadily taper tuesday through wednesday, as a new area of 
high pressure around 30.3 inches builds into northern wisconsin.


lmz080-669-671-673-675-777-779-870-872-874-876-878-182130-
lake michigan from michigan city in to st. joseph mi 5 nm
offshore to mid lake-
lake michigan from sheboygan to port washington wi 5 nm offshore
to mid lake-
lake michigan from port washington to north point light wi 5 nm
offshore to mid lake-
lake michigan from north point light to wind point wi 5 nm
offshore to mid lake-
lake michigan from wind point wi to winthrop harbor il 5 nm
offshore to mid lake-
lake michigan from winthrop harbor to wilmette harbor il 5 nm
offshore to mid lake-
lake michigan from wilmette harbor il to michigan city in 5 nm
offshore to mid lake-
lake michigan from whitehall to pentwater mi 5 nm offshore to mid
lake-
lake michigan from grand haven to whitehall mi 5 nm offshore to
mid lake-
lake michigan from holland to grand haven mi 5 nm offshore to mid
lake-
lake michigan from south haven to holland mi 5 nm offshore to mid
lake-
lake michigan from st. joseph to south haven mi 5 nm offshore to
mid lake-
859 am cdt fri sep 18 2026

sheboygan wi to pentwater mi south...

.rest of today...northeast winds 10 to 20 kt. waves 3 to 5 ft. 
.tonight...northeast winds 10 to 20 kt becoming east 15 to 25 kt
late in the evening, then increasing to 30 kt after midnight
becoming east to 30 kt late. chance of showers in the evening,
then showers and slight chance of thunderstorms overnight. waves
3 to 5 ft building to 5 to 8 ft occasionally to 10 ft. 
.saturday...southeast winds to 30 kt becoming east 15 to 25 kt.
showers with a chance of thunderstorms in the morning, then
chance of showers in the afternoon. waves 6 to 9 ft occasionally
to 12 ft. 
.saturday night...east winds 15 to 25 kt becoming northeast 10 to
20 kt. chance of showers in the evening, then showers likely
overnight. waves 4 to 7 ft occasionally to 9 ft subsiding to 4 to
6 ft occasionally to 8 ft. 
.sunday...northeast winds to 30 kt increasing to gales to 35 kt.
chance of showers. waves 5 to 8 ft occasionally to 10 ft building
to 8 to 11 ft occasionally to 14 ft. 
.sunday night...northeast gales to 35 kt becoming east to 30 kt.
chance of showers. waves 8 to 11 ft occasionally to 14 ft
subsiding to 7 to 10 ft occasionally to 13 ft. 
.monday...east winds to 30 kt becoming northeast gales to 35 kt.
chance of showers. waves 8 to 12 ft occasionally to 16 ft
building to 10 to 14 ft occasionally to 18 ft. 
.tuesday...northeast winds to 30 kt. chance of showers. waves
7 to 10 ft occasionally to 13 ft.  

$$

fzus63 kmkx 181359
glflm 
expires:202609182130;;657236

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
859 am cdt fri sep 18 2026

for waters beyond five nautical miles of shore on lake michigan.

waves are provided as a range of significant wave heights, which
is the average of the highest 1/3 of the wave, along with the
average height of the highest 10% of the waves which will
occasionally be encountered.

.synopsis...

low pressure around 29.9 inches will develop near the missouri 
river this afternoon, moving over or just south of waters during 
the day on saturday. winds will veer east southeasterly ahead of 
the low, becoming gusty at times. a few gusts could approach gale
thresholds, particularly tonight and saturday morning. areas of 
widespread showers and thunderstorms will accompany the passing 
area of low pressure tonight through at least saturday night.

winds will trend northeasterly sunday through monday night, as 
the aforementioned area of low pressure slowly moves into the ohio
river valley. additional rain showers will accompany the passing 
low. high pressure around 30.5 inches will concurrently slide 
into ontario from the canadian great plains, with gusty winds
expected through most of the late weekend to early week time 
frame. similar to saturday, gusts could occasionally approach gale
thresholds during the sunday into monday night time frame. winds 
will steadily taper tuesday through wednesday, as a new area of 
high pressure around 30.3 inches builds into northern wisconsin.


lmz261-362-364-366-563-565-567-868-182130-
lake michigan from seul choix point to rock island passage 5 nm
offshore to mid lake-
lake michigan south of a line from seul choix point to the
mackinac bridge and north of a line from charlevoix mi to south
fox island 5 nm offshore-
lake michigan from charlevoix to point betsie mi 5 nm offshore to
mid lake-
lake michigan from point betsie to manistee mi 5 nm offshore to
mid lake-
lake michigan from rock island passage to sturgeon bay wi-
lake michigan from sturgeon bay to two rivers wi 5 nm offshore to
mid lake-
lake michigan from two rivers to sheboygan wi 5 nm offshore to
mid lake-
lake michigan from pentwater to manistee mi 5 nm offshore to mid
lake-
859 am cdt fri sep 18 2026

sheboygan wi to pentwater mi north...

.rest of today...northeast winds 10 to 20 kt. slight chance of
showers this afternoon. waves 2 to 4 ft. 
.tonight...northeast winds 10 to 20 kt becoming southeast 15 to
25 kt. chance of showers. waves 2 to 4 ft building to 3 to 5 ft. 
.saturday...southeast winds 15 to 25 kt becoming east. chance of
showers. waves 4 to 7 ft occasionally to 9 ft. 
.saturday night...east winds 10 to 20 kt becoming northeast.
chance of showers. waves 3 to 5 ft subsiding to 2 to 4 ft. 
.sunday...northeast winds to 30 kt. waves 4 to 6 ft occasionally
to 8 ft building to 6 to 9 ft occasionally to 12 ft. 
.sunday night...northeast winds to 30 kt becoming east 15 to
25 kt. waves 6 to 9 ft occasionally to 12 ft. 
.monday...east winds to 30 kt becoming northeast. waves 4 to 7 ft
occasionally to 9 ft. 
.tuesday...northeast winds 15 to 25 kt increasing to 30 kt. waves
4 to 6 ft occasionally to 8 ft.  

$$

fzus63 kmqt 181401
glfls 
expires:202609182000;;657403

open lake forecast for lake superior
national weather service marquette mi
1001 am edt fri sep 18 2026

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

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

.synopsis...

30.4 inch high pressure continues to track eastward across northern 
ontario through tonight, weakening to 30.2 inches as it moves into 
western quebec saturday morning. meanwhile, 29.8 inch low pressure 
develops over the central plains, reaching western iowa by saturday 
morning as another 29.8 inch low tracks across hudson bay. saturday 
into sunday, a 30.2 inch high over the canadian prairie builds to 
30.4 inches as it moves into northwestern ontario, creating a 30.1 
inch ridging pattern over lake superior. this high pressure center 
slowly builds to 30.5 inches as it shifts into quebec by midday 
tuesday, trailing a 30.4 inch ridge over lake superior. the high 
builds further to 30.6 inches wednesday as it progresses eastward.




lsz264-182000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
1001 am edt fri sep 18 2026

.rest of today...east winds 5 to 15 knots veering southeast in
the afternoon. waves 1 to 3 feet subsiding to calm to 2 feet. 
.tonight...southeast winds 5 to 15 knots veering south late.
waves calm to 2 feet. 
.saturday...south winds 5 to 15 knots backing southeast in the
afternoon, then diminishing to less than 10 knots late. waves
calm to 2 feet. 
.saturday night...southeast winds less than 10 knots becoming
north 10 to 20 knots after midnight. waves calm to 2 feet. 
.sunday...northeast winds 15 to 25 knots. waves building to 3 to
5 feet occasionally to 7 feet, then subsiding to 1 to 3 feet. 
.sunday night...northeast winds 10 to 20 knots veering east after
midnight. waves subsiding to calm to 2 feet, then building to
1 to 3 feet. 
.monday...east winds 10 to 20 knots diminishing to 5 to 15 knots.
waves subsiding to calm to 2 feet. 
.tuesday...east winds 5 to 15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 181401
glfls 
expires:202609182000;;657404

open lake forecast for lake superior
national weather service marquette mi
1001 am edt fri sep 18 2026

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

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

.synopsis...

30.4 inch high pressure continues to track eastward across northern 
ontario through tonight, weakening to 30.2 inches as it moves into 
western quebec saturday morning. meanwhile, 29.8 inch low pressure 
develops over the central plains, reaching western iowa by saturday 
morning as another 29.8 inch low tracks across hudson bay. saturday 
into sunday, a 30.2 inch high over the canadian prairie builds to 
30.4 inches as it moves into northwestern ontario, creating a 30.1 
inch ridging pattern over lake superior. this high pressure center 
slowly builds to 30.5 inches as it shifts into quebec by midday 
tuesday, trailing a 30.4 inch ridge over lake superior. the high 
builds further to 30.6 inches wednesday as it progresses eastward.




lsz265-182000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
1001 am edt fri sep 18 2026

.rest of today...east winds 10 to 20 knots increasing to 15 to
25 knots late. waves 1 to 3 feet. 
.tonight...southeast winds 10 to 20 knots veering south late.
waves subsiding to calm to 2 feet. 
.saturday...southeast winds 10 to 20 knots backing east late.
waves calm to 2 feet. 
.saturday night...east winds 5 to 15 knots becoming north 10 to
20 knots after midnight. waves calm to 2 feet. 
.sunday...northeast winds 20 to 30 knots. waves building to 3 to
5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. 
.sunday night...northeast winds 20 to 30 knots veering east after
midnight. waves building to 3 to 5 feet occasionally to 7 feet. 
.monday...east winds 15 to 25 knots diminishing to 10 to
20 knots. waves subsiding to calm to 2 feet. 
.tuesday...east winds 10 to 20 knots. waves building to 1 to
3 feet, then subsiding to calm to 2 feet. 

$$

fzus63 kmqt 181401
glfls 
expires:202609182000;;657401

open lake forecast for lake superior
national weather service marquette mi
1001 am edt fri sep 18 2026

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

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

.synopsis...

30.4 inch high pressure continues to track eastward across northern 
ontario through tonight, weakening to 30.2 inches as it moves into 
western quebec saturday morning. meanwhile, 29.8 inch low pressure 
develops over the central plains, reaching western iowa by saturday 
morning as another 29.8 inch low tracks across hudson bay. saturday 
into sunday, a 30.2 inch high over the canadian prairie builds to 
30.4 inches as it moves into northwestern ontario, creating a 30.1 
inch ridging pattern over lake superior. this high pressure center 
slowly builds to 30.5 inches as it shifts into quebec by midday 
tuesday, trailing a 30.4 inch ridge over lake superior. the high 
builds further to 30.6 inches wednesday as it progresses eastward.




lsz162-182000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 am edt fri sep 18 2026 /901 am cdt fri sep 18 2026/

.rest of today...east winds 10 to 20 knots. a slight chance of
showers by mid afternoon. waves 1 to 3 feet building to 2 to
4 feet. 
.tonight...east winds 10 to 20 knots diminishing to 5 to 15 knots
late. a slight chance of showers through midnight. waves
subsiding to calm to 2 feet. 
.saturday...east winds 5 to 15 knots backing northeast late.
waves calm to 2 feet. 
.saturday night...north winds 5 to 15 knots becoming northeast
10 to 20 knots after midnight. waves building to 1 to 3 feet. 
.sunday...northeast winds 20 to 30 knots becoming east gales to
35 knots by mid 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...east winds 20 to 30 knots diminishing to 15 to
25 knots after midnight. waves subsiding to 1 to 3 feet. 
.monday...east winds 20 to 30 knots diminishing to 15 to
25 knots. waves building to 2 to 4 feet, then subsiding to calm
to 2 feet. 
.tuesday...east winds 15 to 25 knots diminishing to 10 to
20 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 181401
glfls 
expires:202609182000;;657406

open lake forecast for lake superior
national weather service marquette mi
1001 am edt fri sep 18 2026

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

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

.synopsis...

30.4 inch high pressure continues to track eastward across northern 
ontario through tonight, weakening to 30.2 inches as it moves into 
western quebec saturday morning. meanwhile, 29.8 inch low pressure 
develops over the central plains, reaching western iowa by saturday 
morning as another 29.8 inch low tracks across hudson bay. saturday 
into sunday, a 30.2 inch high over the canadian prairie builds to 
30.4 inches as it moves into northwestern ontario, creating a 30.1 
inch ridging pattern over lake superior. this high pressure center 
slowly builds to 30.5 inches as it shifts into quebec by midday 
tuesday, trailing a 30.4 inch ridge over lake superior. the high 
builds further to 30.6 inches wednesday as it progresses eastward.




lsz267-182000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
1001 am edt fri sep 18 2026

.rest of today...northeast winds 10 to 20 knots diminishing to
5 to 15 knots in the afternoon. waves 1 to 3 feet subsiding to
calm to 2 feet. 
.tonight...northeast winds 5 to 15 knots veering southeast after
midnight, then becoming south 10 to 20 knots late. waves calm to
2 feet. 
.saturday...southeast winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon, then backing east late. waves calm to
2 feet. 
.saturday night...east winds 5 to 15 knots backing north after
midnight. waves calm to 2 feet. 
.sunday...northeast winds 15 to 25 knots backing north by mid
afternoon. waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to 2 to 4 feet. 
.sunday night...northeast winds 15 to 25 knots veering east after
midnight. waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to 2 to 4 feet. 
.monday...east winds 5 to 15 knots increasing to 10 to 20 knots.
waves subsiding to calm to 2 feet, then building to 1 to 3 feet. 
.tuesday...east winds 5 to 15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 181401
glfls 
expires:202609182000;;657405

open lake forecast for lake superior
national weather service marquette mi
1001 am edt fri sep 18 2026

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

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

.synopsis...

30.4 inch high pressure continues to track eastward across northern 
ontario through tonight, weakening to 30.2 inches as it moves into 
western quebec saturday morning. meanwhile, 29.8 inch low pressure 
develops over the central plains, reaching western iowa by saturday 
morning as another 29.8 inch low tracks across hudson bay. saturday 
into sunday, a 30.2 inch high over the canadian prairie builds to 
30.4 inches as it moves into northwestern ontario, creating a 30.1 
inch ridging pattern over lake superior. this high pressure center 
slowly builds to 30.5 inches as it shifts into quebec by midday 
tuesday, trailing a 30.4 inch ridge over lake superior. the high 
builds further to 30.6 inches wednesday as it progresses eastward.




lsz266-182000-
lake superior east of a line from manitou island to marquette mi
and west of a line from grand marais mi to the us/canadian border
beyond 5nm from shore-
1001 am edt fri sep 18 2026

.rest of today...east winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon. waves 1 to 3 feet subsiding to calm to
2 feet. 
.tonight...east winds 5 to 15 knots veering southeast after
midnight, then becoming south 10 to 20 knots late. waves calm to
2 feet. 
.saturday...southeast winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon, then backing east late. waves calm to
2 feet. 
.saturday night...east winds 5 to 15 knots becoming north 10 to
20 knots after midnight. waves calm to 2 feet. 
.sunday...northeast winds 20 to 30 knots backing north by mid
afternoon. waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to 2 to 4 feet. 
.sunday night...northeast winds 15 to 25 knots veering east after
midnight. waves building to 3 to 5 feet occasionally to 7 feet. 
.monday...east winds 10 to 20 knots. waves subsiding to calm to
2 feet, then building to 1 to 3 feet. 
.tuesday...east winds 10 to 20 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 181401
glfls 
expires:202609182000;;657402

open lake forecast for lake superior
national weather service marquette mi
1001 am edt fri sep 18 2026

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

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

.synopsis...

30.4 inch high pressure continues to track eastward across northern 
ontario through tonight, weakening to 30.2 inches as it moves into 
western quebec saturday morning. meanwhile, 29.8 inch low pressure 
develops over the central plains, reaching western iowa by saturday 
morning as another 29.8 inch low tracks across hudson bay. saturday 
into sunday, a 30.2 inch high over the canadian prairie builds to 
30.4 inches as it moves into northwestern ontario, creating a 30.1 
inch ridging pattern over lake superior. this high pressure center 
slowly builds to 30.5 inches as it shifts into quebec by midday 
tuesday, trailing a 30.4 inch ridge over lake superior. the high 
builds further to 30.6 inches wednesday as it progresses eastward.




lsz263-182000-
lake superior from saxon harbor wi to upper entrance to portage
canal mi 5nm off shore to the us/canadian border including isle
royale national park-
1001 am edt fri sep 18 2026

.rest of today...east winds 5 to 15 knots. a slight chance of
showers by mid afternoon. waves 1 to 3 feet. 
.tonight...east winds 5 to 15 knots veering southeast after
midnight. a slight chance of showers through midnight. waves
subsiding to calm to 2 feet. 
.saturday...southeast winds 5 to 15 knots backing northeast late.
waves calm to 2 feet. 
.saturday night...northeast winds 5 to 15 knots increasing to
10 to 20 knots after midnight. waves building to 1 to 3 feet. 
.sunday...northeast winds 20 to 30 knots increasing to gales to
35 knots by mid 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...east winds 20 to 30 knots diminishing to 10 to
20 knots after midnight. waves subsiding to 1 to 3 feet. 
.monday...east winds 20 to 30 knots diminishing to 15 to
25 knots. waves subsiding to calm to 2 feet. 
.tuesday...east winds 15 to 25 knots diminishing to 10 to
20 knots. waves calm to 2 feet. 

$$