fzus61 kbuf 240203
glflo 
expires:202607240900;;495263

open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt thu jul 23 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 29.3 inch low over northern quebec this morning 
will move northeast and across the north atlantic by tonight. 
meanwhile, a 30.2 inch high will build across the central great 
lakes today, and then across the lake tonight. this high will linger 
from the lower great lakes to new england friday through saturday 
before weakening and drifting off the east coast sunday. a 29.5 inch 
area of low pressure will develop over the western great lakes 
sunday night and move north of the lake monday.


loz063>065-240900-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 pm edt thu jul 23 2026

.overnight...southwest winds 5 to 10 knots. waves 2 feet or
less. 
.friday...southwest winds 5 to 10 knots becoming northeast. waves
1 foot or less. 
.friday night...northeast winds 5 to 10 knots becoming south.
waves 1 foot or less. 
.saturday...south winds 5 to 15 knots becoming southeast. waves
2 feet or less. 
.saturday night...southeast winds 5 to 10 knots becoming south.
waves 1 foot or less. 
.sunday...southwest winds 10 knots or less. a chance of showers
sunday night. waves 1 foot or less. 
.monday...southwest winds 5 to 15 knots becoming south. a chance
of showers and thunderstorms during the day, then showers likely
with a chance of thunderstorms monday night. waves 2 feet or
less. 
.tuesday...southwest winds 10 to 15 knots becoming north. showers
likely with a chance of thunderstorms during the day, then a
chance of showers and thunderstorms tuesday night. waves 1 to
3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 240203
glflo 
expires:202607240900;;495262

open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt thu jul 23 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 29.3 inch low over northern quebec this morning 
will move northeast and across the north atlantic by tonight. 
meanwhile, a 30.2 inch high will build across the central great 
lakes today, and then across the lake tonight. this high will linger 
from the lower great lakes to new england friday through saturday 
before weakening and drifting off the east coast sunday. a 29.5 inch 
area of low pressure will develop over the western great lakes 
sunday night and move north of the lake monday.


loz062-240900-
lake ontario open waters from the niagara river to hamlin beach-
1002 pm edt thu jul 23 2026

.overnight...southwest winds 5 to 10 knots. waves 1 foot or
less. 
.friday...southwest winds 10 knots or less becoming northeast.
waves 1 foot or less. 
.friday night...east winds 5 to 10 knots becoming south. waves
1 foot or less. 
.saturday...south winds 10 knots or less becoming east. waves
1 foot or less. 
.saturday night...southeast winds 5 to 10 knots becoming
southwest. waves 1 foot or less. 
.sunday...southwest winds 5 to 10 knots. a chance of showers and
thunderstorms during the day, then a chance of showers sunday
night. waves 1 foot or less. 
.monday...southwest winds 5 to 10 knots. a chance of showers
during the day, then showers likely with a chance of
thunderstorms monday night. waves 2 feet or less. 
.tuesday...west winds 10 to 15 knots becoming north. showers
likely during the day, then a chance of showers tuesday night.
waves 1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 240142
glfle 
expires:202607240815;;494788

open lake forecast for lake erie
national weather service cleveland oh
942 pm edt thu jul 23 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 continues to build across the region 
tonight and will drift eastward through saturday. sunday, low 
pressure 29.90 inches enters the great lakes region and will track
to the east through tuesday.


lez061-168-169-240815-
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-
942 pm edt thu jul 23 2026

.overnight...south winds less than 10 knots becoming
southeast. waves 1 foot or less. 
.friday...southeast winds less than 10 knots becoming northeast
10 to 15 knots. waves 2 feet or less. 
.friday night...northeast winds 5 to 15 knots becoming south.
waves 2 feet or less. 
.saturday...south winds 5 to 10 knots becoming west. waves 1 foot
or less. 
.saturday night...southwest winds 10 knots or less. waves 1 foot
or less. 
.sunday...southwest winds 5 to 10 knots. a chance of showers
sunday night. waves 1 foot or less. 
.monday...southwest winds 5 to 15 knots increasing to 15 to
20 knots. a chance of showers and thunderstorms during the day,
then showers likely with a chance of thunderstorms monday night.
waves 1 to 3 feet building to 2 to 4 feet. 
.tuesday...southwest winds 10 to 15 knots becoming north. a
chance of showers during the day. waves 2 to 4 feet subsiding to
1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 240142
glfle 
expires:202607240815;;494786

open lake forecast for lake erie
national weather service cleveland oh
942 pm edt thu jul 23 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 continues to build across the region 
tonight and will drift eastward through saturday. sunday, low 
pressure 29.90 inches enters the great lakes region and will track
to the east through tuesday.


lez162-163-240815-
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-
942 pm edt thu jul 23 2026

.overnight...southeast winds 10 knots or less. waves 1 foot
or less. 
.friday...east winds 10 knots or less. waves 1 foot or less. 
.friday night...east winds 10 knots or less becoming west. waves
2 feet or less. 
.saturday...west winds 10 knots or less becoming southwest. waves
1 foot or less. 
.saturday night...south winds 5 to 10 knots becoming west. waves
1 foot or less. 
.sunday...west winds 10 knots or less becoming southwest. a
chance of showers and thunderstorms sunday night. waves 1 foot or
less. 
.monday...southwest winds 10 to 15 knots becoming west. a chance
of showers and thunderstorms during the day, then showers likely
with a chance of thunderstorms monday night. waves 1 to 2 feet. 
.tuesday...northwest winds 10 to 15 knots becoming north. waves
1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 240142
glfle 
expires:202607240815;;494787

open lake forecast for lake erie
national weather service cleveland oh
942 pm edt thu jul 23 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 continues to build across the region 
tonight and will drift eastward through saturday. sunday, low 
pressure 29.90 inches enters the great lakes region and will track
to the east through tuesday.


lez164>167-240815-
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-
942 pm edt thu jul 23 2026

.overnight...east winds less than 10 knots becoming
southeast. waves 1 foot or less. 
.friday...southeast winds 10 knots or less becoming northeast
10 to 15 knots. waves 1 to 3 feet. 
.friday night...northeast winds 5 to 15 knots becoming south.
waves 1 to 3 feet. 
.saturday...southwest winds 10 knots or less becoming west. waves
1 foot or less. 
.saturday night...southwest winds 10 knots or less. a chance of
showers overnight. waves 1 foot or less. 
.sunday...west winds 5 to 10 knots becoming southwest. a chance
of showers. waves 1 foot or less. 
.monday...southwest winds 10 to 15 knots increasing to 15 to
20 knots. a chance of showers and thunderstorms during the day,
then showers likely with a chance of thunderstorms monday night.
waves 1 to 3 feet building to 2 to 4 feet. 
.tuesday...northwest winds 15 to 20 knots becoming north 10 to
15 knots. a chance of showers during the day. waves 2 to 4 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 240202
glfsc 
expires:202607241015;;495258

lake st clair forecast
national weather service detroit/pontiac mi
1002 pm edt thu jul 23 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, 30.10 inches, over the eastern great
lakes evening will slowly track east and reach the mid atlantic
tomorrow. light winds and dry weather will give way to a chance
of showers and isolated thunderstorms over the weekend as a
surface trough slowly tracks through.


lcz460-241015-
lake st clair-
1002 pm edt thu jul 23 2026

.rest of tonight...south winds 5 to 10 knots becoming light and 
variable. clear. waves 2 feet or less.
.friday...light and variable winds becoming southeast 5 to 10 knots
in the afternoon. mostly sunny. waves 2 feet or less.
.friday night...southeast winds 5 to 10 knots becoming light and
variable. clear. waves 2 feet or less.
.saturday...light and variable winds becoming southwest 5 to 10
knots in the late morning and afternoon. mostly sunny. waves 2 feet
or less.
.saturday night...southwest winds 5 to 10 knots. partly cloudy. a
chance of light showers after midnight. waves 2 feet or less.
.sunday...west winds 5 to 10 knots veering to the north in the
afternoon...then veering to the southeast in the evening. partly
sunny in the morning...then mostly clear with a chance of showers
and thunderstorms in the afternoon and evening. waves 2 feet or
less.
.monday...southwest winds 10 to 15 knots. partly cloudy. showers
likely and a chance of thunderstorms. waves 2 feet or less.
.tuesday...north winds 10 to 15 knots. mostly clear. showers likely
and a chance of thunderstorms. waves 2 feet or less.

$$

fzus63 kdtx 240200
glflh 
expires:202607241000;;495122

open lake forecast for lake huron
national weather service detroit/pontiac mi
1000 pm edt thu jul 23 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, 30.10 inches, over the eastern great
lakes will slowly track east and reach the mid atlantic tomorrow.
light winds and dry weather will give way to a chance of showers 
and isolated thunderstorms over the weekend as a surface trough 
slowly tracks through the region.


lhz362-363-241000-
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-
1000 pm edt thu jul 23 2026

.rest of tonight...south winds 5 to 10 knots. waves 1 to 3 feet. 
.friday...light and variable winds becoming southeast 5 to
10 knots in the afternoon. waves 2 feet or less building to 2 to
4 feet late in the afternoon. 
.friday night...southeast winds 10 to 15 knots becoming south
5 to 10 knots after midnight. waves 3 to 5 feet subsiding to 1 to
3 feet after midnight. 
.saturday...south winds 5 to 10 knots increasing to 10 to
15 knots in the late morning and afternoon. waves 1 to 3 feet
building to 2 to 4 feet early in the afternoon. 
.saturday night...south winds 10 to 15 knots becoming southwest
5 to 10 knots in the late evening and overnight. a chance of
showers. waves 2 to 4 feet subsiding to 1 to 3 feet in the late
evening and overnight. 
.sunday...west winds 5 to 10 knots in the morning becoming light
and variable...then becoming north 5 to 10 knots late in the
afternoon veering to the south. a chance of showers late in the
afternoon. a chance of thunderstorms late in the evening. waves
2 feet or less. 
.monday...south winds 5 to 10 knots becoming west 10 to 15 knots
by midnight. a chance of showers and thunderstorms...then a
chance of showers by midnight. waves 1 to 3 feet. 
.tuesday...north winds 10 to 15 knots. waves 2 to 4 feet. 


$$

fzus63 kdtx 240200
glflh 
expires:202607241000;;495123

open lake forecast for lake huron
national weather service detroit/pontiac mi
1000 pm edt thu jul 23 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, 30.10 inches, over the eastern great
lakes will slowly track east and reach the mid atlantic tomorrow.
light winds and dry weather will give way to a chance of showers 
and isolated thunderstorms over the weekend as a surface trough 
slowly tracks through the region.


lhz462>464-241000-
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-
1000 pm edt thu jul 23 2026

.rest of tonight...south winds 5 to 10 knots. waves 2 feet or
less. 
.friday...southwest winds 5 to 10 knots early in the morning
becoming light and variable...then becoming southeast 5 to
10 knots in the afternoon. waves 2 feet or less. 
.friday night...east winds 5 to 10 knots veering to the south in
the late evening and overnight. waves 2 feet or less. 
.saturday...south winds 5 to 10 knots. waves 2 feet or less. 
.saturday night...south winds 5 to 10 knots veering to the
southwest after midnight. a chance of showers. waves 2 feet or
less. 
.sunday...west winds 5 to 10 knots veering to the northwest late
in the morning...then veering to the north late in the afternoon
veering to the southeast late in the evening. a chance of
showers...then a chance of showers and thunderstorms late in the
evening. waves 2 feet or less. 
.monday...southwest winds 5 to 10 knots becoming southeast 10 to
15 knots early in the evening...then veering to the southwest by
midnight. a chance of showers early in the morning. a chance of
thunderstorms. rain showers likely until early evening. waves
1 to 3 feet. 
.tuesday...northwest winds 10 to 15 knots becoming north 15 to
20 knots in the late morning and early afternoon...then
decreasing to 10 to 15 knots . waves 3 to 5 feet. 


$$

fzus63 kdtx 240200
glflh 
expires:202607241000;;495121

open lake forecast for lake huron
national weather service detroit/pontiac mi
1000 pm edt thu jul 23 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, 30.10 inches, over the eastern great
lakes will slowly track east and reach the mid atlantic tomorrow.
light winds and dry weather will give way to a chance of showers 
and isolated thunderstorms over the weekend as a surface trough 
slowly tracks through the region.


lhz361-241000-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
1000 pm edt thu jul 23 2026

.rest of tonight...southwest winds 5 to 10 knots. waves 1 to
3 feet. 
.friday...southwest winds 5 to 10 knots backing to the southeast
in the afternoon. waves 1 to 3 feet. 
.friday night...east winds 5 to 10 knots veering to the south in
the late evening and overnight. waves 3 to 5 feet subsiding to
1 to 3 feet after midnight. 
.saturday...south winds 10 to 15 knots decreasing to 5 to
10 knots early in the afternoon. a chance of showers in the
afternoon. waves 1 to 3 feet. 
.saturday night...light and variable winds becoming west 5 to
10 knots after midnight. a chance of showers. waves 1 to 3 feet. 
.sunday...west winds 5 to 10 knots in the morning becoming light
and variable...then becoming south 5 to 10 knots late in the
afternoon. a chance of showers late in the afternoon. a chance of
showers and thunderstorms late in the evening. waves 2 feet or
less. 
.monday...southwest winds 5 to 10 knots backing to the south
until early evening...then becoming northwest 10 to 15 knots by
midnight. a chance of showers early in the morning. a chance of
thunderstorms. rain showers likely until early evening. waves
2 feet or less building to 2 to 4 feet by midnight. 
.tuesday...northwest winds 10 to 15 knots. waves 2 to 4 feet. 


$$

fzus63 kmkx 240200
glflm 
expires:202607240915;;495116

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
900 pm cdt thu jul 23 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...

south to southwest winds are expected to gradually weaken 
overnight, as high pressure around 30.2 inches remains to the 
southeast. south winds will increase across the lake on friday, as
high pressure moves further to the east. low pressure around 29.5
inches will move quickly east from the canadian great plains 
toward quebec friday through saturday, maintaining gusty south to 
southwest winds. southerly gusts up to 30 knots are expected over 
the north half of the lake.

the low will pull a cold front into the western great lakes on 
saturday, with the boundary slowly advancing southeast across the 
region saturday night. this will result in increasing thunderstorm
chances across the northern two thirds of the lake. the front 
then becomes stationary through the middle of next week, with 
switches between northerly and southerly winds possible at times.
additional rounds of storms are possible, and some may become 
severe.


lmz261-362-364-366-563-565-567-868-240915-
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-
900 pm cdt thu jul 23 2026

sheboygan wi to pentwater mi north...

.rest of tonight...southwest winds 15 to 25 kt diminishing to
10 to 20 kt. waves 2 to 4 ft. 
.friday...southwest winds 10 to 20 kt becoming south 15 to 25 kt.
waves 1 to 3 ft building to 3 to 5 ft. 
.friday night...south winds to 30 kt becoming southwest. waves
3 to 5 ft. 
.saturday...southwest winds to 30 kt. chance of showers in the
afternoon. waves 3 to 5 ft. 
.saturday night...south winds 15 to 25 kt becoming west 10 to
15 kt overnight. chance of showers. waves 3 to 5 ft subsiding to
2 to 4 ft. 
.sunday...northwest winds 10 to 15 kt backing to south 10 to
20 kt. waves 1 to 3 ft. 
.sunday night...south winds 10 to 20 kt becoming southwest.
showers likely with a chance of thunderstorms. waves 1 to 3 ft.
.monday...southwest winds 15 to 25 kt increasing to 30 kt. chance
of showers and thunderstorms. waves 3 to 5 ft. 
.tuesday...north winds 15 to 25 kt increasing to 30 kt. waves
2 to 4 ft.  

$$

fzus63 kmkx 240200
glflm 
expires:202607240915;;495117

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
900 pm cdt thu jul 23 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...

south to southwest winds are expected to gradually weaken 
overnight, as high pressure around 30.2 inches remains to the 
southeast. south winds will increase across the lake on friday, as
high pressure moves further to the east. low pressure around 29.5
inches will move quickly east from the canadian great plains 
toward quebec friday through saturday, maintaining gusty south to 
southwest winds. southerly gusts up to 30 knots are expected over 
the north half of the lake.

the low will pull a cold front into the western great lakes on 
saturday, with the boundary slowly advancing southeast across the 
region saturday night. this will result in increasing thunderstorm
chances across the northern two thirds of the lake. the front 
then becomes stationary through the middle of next week, with 
switches between northerly and southerly winds possible at times.
additional rounds of storms are possible, and some may become 
severe.


lmz080-669-671-673-675-777-779-870-872-874-876-878-240915-
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-
900 pm cdt thu jul 23 2026

sheboygan wi to pentwater mi south...

.rest of tonight...south winds 10 to 15 kt becoming southwest.
waves 1 to 3 ft. 
.friday...southwest winds 5 to 10 kt becoming south late in the
morning, then becoming 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. 
.friday night...south winds 15 to 25 kt becoming southwest 10 to
20 kt. waves 3 to 5 ft subsiding to 2 to 4 ft. 
.saturday...southwest winds 15 to 25 kt becoming south. waves
3 to 5 ft. 
.saturday night...south winds 15 to 25 kt becoming southwest
10 to 15 kt overnight. waves 3 to 5 ft subsiding to 1 to 3 ft. 
.sunday...west winds 10 to 15 kt becoming southwest 10 to 20 kt.
waves 1 to 3 ft. 
.sunday night...south winds 10 to 20 kt becoming southwest.
chance of showers and thunderstorms. waves 2 to 4 ft. 
.monday...southwest winds 15 to 25 kt. chance of showers. waves
3 to 5 ft. 
.tuesday...north winds 15 to 25 kt increasing to 30 kt. waves
4 to 6 ft occasionally to 8 ft.  

$$

fzus63 kmqt 240201
glfls 
expires:202607240800;;495171

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt thu jul 23 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... 

weak 29.9 inch troughing moves over the northwest half of lake 
superior friday as 30.1 inch high pressure over lower michigan 
shifts east towards lake ontario. expect troughing to deepen to 29.8 
inches over the lake through saturday as a 29.3 inch low tracks 
across hudson bay friday night. weak ridging of around 29.9 inches 
develops over the lake saturday night. a 29.5 inch clipper low moves 
into the upper great lakes or upper midwest by monday. 




lsz162-240800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 pm edt thu jul 23 2026 /901 pm cdt thu jul 23 2026/

.rest of tonight...southwest winds 10 to 20 knots increasing to
15 to 25 knots after midnight, then diminishing to 10 to 20 knots
late. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.friday...southwest winds 10 to 20 knots. waves subsiding to calm
to 2 feet. 
.friday night...southwest winds 15 to 25 knots increasing to
20 to 30 knots after midnight. a chance of showers and
thunderstorms. waves building to 3 to 5 feet occasionally to
7 feet. 
.saturday...southwest winds 15 to 25 knots diminishing to 5 to
15 knots by mid afternoon. waves subsiding to calm to 2 feet. 
.saturday night...west winds 5 to 15 knots veering northeast
after midnight. waves calm to 2 feet. 
.sunday...east winds 5 to 15 knots backing northeast by mid
afternoon. waves calm to 2 feet. 
.sunday night...northeast winds 5 to 15 knots. a chance of
showers and thunderstorms. waves calm to 2 feet. 
.monday...northeast winds 5 to 15 knots backing north. waves calm
to 2 feet. 
.tuesday...east winds 5 to 15 knots backing northeast. waves calm
to 2 feet. 

$$

fzus63 kmqt 240201
glfls 
expires:202607240800;;495174

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt thu jul 23 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... 

weak 29.9 inch troughing moves over the northwest half of lake 
superior friday as 30.1 inch high pressure over lower michigan 
shifts east towards lake ontario. expect troughing to deepen to 29.8 
inches over the lake through saturday as a 29.3 inch low tracks 
across hudson bay friday night. weak ridging of around 29.9 inches 
develops over the lake saturday night. a 29.5 inch clipper low moves 
into the upper great lakes or upper midwest by monday. 




lsz265-240800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
1001 pm edt thu jul 23 2026

.rest of tonight...southwest winds 10 to 20 knots increasing to
15 to 25 knots after midnight. waves calm to 2 feet. 
.friday...southwest winds 10 to 20 knots backing southeast late.
waves building to 1 to 3 feet. 
.friday night...south winds 15 to 25 knots increasing to 20 to
30 knots after midnight, then veering southwest late. a chance of
showers and a slight chance of thunderstorms after midnight.
waves building to 2 to 4 feet. 
.saturday...southwest winds 15 to 25 knots becoming west 10 to
20 knots by mid afternoon. a chance of showers and a slight
chance of thunderstorms. waves subsiding to calm to 2 feet. 
.saturday night...southeast winds 5 to 15 knots veering south
after midnight. waves calm to 2 feet. 
.sunday...southeast winds 5 to 15 knots becoming east 10 to
20 knots by mid afternoon. a chance of showers by mid afternoon.
waves calm to 2 feet. 
.sunday night...southeast winds 10 to 20 knots. a chance of
showers. waves calm to 2 feet. 
.monday...northeast winds 10 to 20 knots backing north. a chance
of showers and thunderstorms. waves calm to 2 feet. 
.tuesday...north winds 5 to 15 knots backing west. waves calm to
2 feet. 

$$

fzus63 kmqt 240201
glfls 
expires:202607240800;;495175

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt thu jul 23 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... 

weak 29.9 inch troughing moves over the northwest half of lake 
superior friday as 30.1 inch high pressure over lower michigan 
shifts east towards lake ontario. expect troughing to deepen to 29.8 
inches over the lake through saturday as a 29.3 inch low tracks 
across hudson bay friday night. weak ridging of around 29.9 inches 
develops over the lake saturday night. a 29.5 inch clipper low moves 
into the upper great lakes or upper midwest by monday. 




lsz266-240800-
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 pm edt thu jul 23 2026

.rest of tonight...southwest winds 10 to 20 knots increasing to
15 to 25 knots late. waves 3 to 5 feet occasionally to 7 feet
subsiding to 2 to 4 feet. 
.friday...southwest winds 10 to 20 knots backing south in the
afternoon, then increasing to 20 to 30 knots late. waves
subsiding to calm to 2 feet, then building to 2 to 4 feet. 
.friday night...south winds 20 to 30 knots. a chance of showers
and a slight chance of thunderstorms after midnight. waves
building to 3 to 6 feet occasionally to 8 feet. 
.saturday...southwest winds 15 to 25 knots becoming west 5 to
15 knots by mid afternoon. showers through early afternoon. a
slight chance of thunderstorms. a chance of showers by mid
afternoon. waves subsiding to 1 to 3 feet. 
.saturday night...east winds 5 to 15 knots. a slight chance of
showers through midnight. waves subsiding to calm to 2 feet. 
.sunday...southeast winds 5 to 15 knots. a chance of showers by
mid afternoon. waves calm to 2 feet. 
.sunday night...southeast winds 10 to 20 knots veering south
after midnight. a chance of showers. waves calm to 2 feet. 
.monday...north winds 10 to 20 knots. a chance of thunderstorms.
a chance of showers. waves calm to 2 feet. 
.tuesday...north winds 5 to 15 knots backing northwest. waves
calm to 2 feet. 

$$

fzus63 kmqt 240201
glfls 
expires:202607240800;;495176

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt thu jul 23 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... 

weak 29.9 inch troughing moves over the northwest half of lake 
superior friday as 30.1 inch high pressure over lower michigan 
shifts east towards lake ontario. expect troughing to deepen to 29.8 
inches over the lake through saturday as a 29.3 inch low tracks 
across hudson bay friday night. weak ridging of around 29.9 inches 
develops over the lake saturday night. a 29.5 inch clipper low moves 
into the upper great lakes or upper midwest by monday. 




lsz267-240800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
1001 pm edt thu jul 23 2026

.rest of tonight...southwest winds 10 to 20 knots. waves 1 to
3 feet subsiding to calm to 2 feet, then building to 1 to 3 feet.
.friday...southwest winds 5 to 15 knots backing south in the
afternoon. waves subsiding to calm to 2 feet. 
.friday night...south winds 15 to 25 knots increasing to 20 to
30 knots late. a chance of showers after midnight. waves building
to 3 to 6 feet occasionally to 8 feet. 
.saturday...south winds 15 to 25 knots becoming west 5 to
15 knots by mid afternoon. showers through early afternoon. a
slight chance of thunderstorms. a chance of showers by mid
afternoon. waves subsiding to calm to 2 feet. 
.saturday night...west winds 5 to 15 knots veering northwest
after midnight. a slight chance of showers through midnight.
waves calm to 2 feet. 
.sunday...southeast winds 5 to 15 knots backing east by mid
afternoon. a chance of showers by mid afternoon. waves calm to
2 feet. 
.sunday night...southeast winds 5 to 15 knots veering south after
midnight. a chance of showers and thunderstorms. waves calm to
2 feet. 
.monday...northwest winds 10 to 20 knots. a chance of showers and
thunderstorms. waves calm to 2 feet. 
.tuesday...northwest winds 10 to 20 knots diminishing to 5 to
15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 240201
glfls 
expires:202607240800;;495172

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt thu jul 23 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... 

weak 29.9 inch troughing moves over the northwest half of lake 
superior friday as 30.1 inch high pressure over lower michigan 
shifts east towards lake ontario. expect troughing to deepen to 29.8 
inches over the lake through saturday as a 29.3 inch low tracks 
across hudson bay friday night. weak ridging of around 29.9 inches 
develops over the lake saturday night. a 29.5 inch clipper low moves 
into the upper great lakes or upper midwest by monday. 




lsz263-240800-
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 pm edt thu jul 23 2026

.rest of tonight...southwest winds 10 to 20 knots increasing to
15 to 25 knots after midnight. waves 3 to 5 feet occasionally to
7 feet subsiding to 2 to 4 feet. 
.friday...southwest winds 15 to 25 knots diminishing to 10 to
20 knots late. waves subsiding to 1 to 3 feet. 
.friday night...south winds 20 to 30 knots veering southwest
after midnight. a chance of showers. a chance of thunderstorms
after midnight. waves building to 3 to 6 feet occasionally to
8 feet. 
.saturday...southwest winds 20 to 30 knots diminishing to 10 to
20 knots by mid afternoon. a slight chance of showers and
thunderstorms through early afternoon. waves subsiding to calm to
2 feet. 
.saturday night...southwest winds 5 to 15 knots backing northeast
after midnight. waves calm to 2 feet. 
.sunday...east winds less than 10 knots increasing to 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.sunday night...east winds 5 to 15 knots backing northeast after
midnight. a chance of showers and thunderstorms. waves calm to
2 feet. 
.monday...northeast winds 5 to 15 knots backing north. waves calm
to 2 feet. 
.tuesday...north winds 5 to 15 knots becoming east less than
10 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 240201
glfls 
expires:202607240800;;495173

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt thu jul 23 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... 

weak 29.9 inch troughing moves over the northwest half of lake 
superior friday as 30.1 inch high pressure over lower michigan 
shifts east towards lake ontario. expect troughing to deepen to 29.8 
inches over the lake through saturday as a 29.3 inch low tracks 
across hudson bay friday night. weak ridging of around 29.9 inches 
develops over the lake saturday night. a 29.5 inch clipper low moves 
into the upper great lakes or upper midwest by monday. 




lsz264-240800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
1001 pm edt thu jul 23 2026

.rest of tonight...southwest winds 10 to 20 knots. waves 3 to
5 feet occasionally to 7 feet subsiding to 2 to 4 feet. 
.friday...southwest winds 10 to 20 knots backing south late.
waves subsiding to 1 to 3 feet. 
.friday night...south winds 15 to 25 knots veering southwest
late. a chance of showers and thunderstorms after midnight. waves
building to 3 to 6 feet occasionally to 8 feet. 
.saturday...southwest winds 20 to 30 knots becoming west 10 to
20 knots by mid afternoon. a chance of showers and a slight
chance of thunderstorms through early afternoon. waves subsiding
to 1 to 3 feet. 
.saturday night...east winds 5 to 15 knots diminishing to less
than 10 knots after midnight. waves subsiding to calm to 2 feet. 
.sunday...southeast winds less than 10 knots increasing to 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.sunday night...southeast winds 5 to 15 knots backing northeast
after midnight. a chance of showers. waves calm to 2 feet. 
.monday...northeast winds 5 to 15 knots backing north. a chance
of showers and thunderstorms. waves calm to 2 feet. 
.tuesday...north winds 5 to 15 knots becoming west less than
10 knots. waves calm to 2 feet. 

$$