fzus61 kbuf 232002
glflo 
expires:202607240300;;482600

open lake forecast for lake ontario
national weather service buffalo ny
402 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.


loz062-240300-
lake ontario open waters from the niagara river to hamlin beach-
402 pm edt thu jul 23 2026

.tonight...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 kbuf 232002
glflo 
expires:202607240300;;482601

open lake forecast for lake ontario
national weather service buffalo ny
402 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>065-240300-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 pm edt thu jul 23 2026

.tonight...west winds 5 to 15 knots becoming southwest. waves
1 to 3 feet subsiding to 1 foot 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 kcle 231940
glfle 
expires:202607240215;;481880

open lake forecast for lake erie
national weather service cleveland oh
340 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 
this evening 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. 


lez162-163-240215-
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-
340 pm edt thu jul 23 2026

.tonight...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
1 foot 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 231940
glfle 
expires:202607240215;;481881

open lake forecast for lake erie
national weather service cleveland oh
340 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 
this evening 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>167-240215-
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-
340 pm edt thu jul 23 2026

.tonight...east winds less than 10 knots becoming southeast.
waves 1 foot or less. 
.friday...southeast winds 10 knots or less becoming northeast.
waves 1 foot or less. 
.friday night...northeast winds 5 to 10 knots becoming south.
waves 1 foot or less. 
.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.

$$

fzus61 kcle 231940
glfle 
expires:202607240215;;481882

open lake forecast for lake erie
national weather service cleveland oh
340 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 
this evening 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. 


lez061-168-169-240215-
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-
340 pm edt thu jul 23 2026

.tonight...southwest winds less than 10 knots becoming southeast.
waves 1 foot or less. 
.friday...southeast winds 10 knots or less 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 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.

$$

fzus63 kdtx 231951
glfsc 
expires:202607240400;;482244

lake st clair forecast
national weather service detroit/pontiac mi
351 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 central great
lakes this afternoon 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.


lcz460-240400-
lake st clair-
351 pm edt thu jul 23 2026

.tonight...light and variable winds. 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 231950
glflh 
expires:202607240400;;482242

open lake forecast for lake huron
national weather service detroit/pontiac mi
350 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 central great
lakes this afternoon 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.


lhz462>464-240400-
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-
350 pm edt thu jul 23 2026

.tonight...southeast winds 5 to 10 knots veering to the south
early in the morning. 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 231950
glflh 
expires:202607240400;;482241

open lake forecast for lake huron
national weather service detroit/pontiac mi
350 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 central great
lakes this afternoon 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.


lhz362-363-240400-
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-
350 pm edt thu jul 23 2026

.tonight...south winds 10 to 15 knots decreasing to 5 to 10 knots
in the late evening and overnight. 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 231950
glflh 
expires:202607240400;;482240

open lake forecast for lake huron
national weather service detroit/pontiac mi
350 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 central great
lakes this afternoon 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.


lhz361-240400-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
350 pm edt thu jul 23 2026

.tonight...west winds 15 to 20 knots becoming southwest 5 to 15 
knots in the late evening and overnight. waves 2 to 4 feet 
subsiding to 1 to 3 feet in the late evening and overnight. 
.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 231957
glflm 
expires:202607240330;;482362

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
257 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...

light and variable winds are expected through tonight as high 
pressure around 30.1 inches builds across the lake. southerly 
winds develop into friday as high pressure moves into the 
northeastern united states. a 29.5 inch low pressure system will 
move quickly from the canadian great plains toward quebec friday 
through saturday, maintaining south to southwest winds. southerly
gusts up to 30 kt are expected over the north half.

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


lmz261-362-364-366-563-565-567-868-240330-
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-
257 pm cdt thu jul 23 2026

sheboygan wi to pentwater mi north...

.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 2 to 4 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
3 to 5 ft.  

$$

fzus63 kmkx 231957
glflm 
expires:202607240330;;482363

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
257 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...

light and variable winds are expected through tonight as high 
pressure around 30.1 inches builds across the lake. southerly 
winds develop into friday as high pressure moves into the 
northeastern united states. a 29.5 inch low pressure system will 
move quickly from the canadian great plains toward quebec friday 
through saturday, maintaining south to southwest winds. southerly
gusts up to 30 kt are expected over the north half.

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


lmz080-669-671-673-675-777-779-870-872-874-876-878-240330-
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-
257 pm cdt thu jul 23 2026

sheboygan wi to pentwater mi south...

.tonight...south winds 10 to 20 kt becoming southwest 10 to
15 kt. waves 1 to 3 ft. 
.friday...southwest winds 5 to 10 kt becoming south 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. 
.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 232001
glfls 
expires:202607240800;;482480

open lake forecast for lake superior
national weather service marquette mi
401 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 will move over the northwest half of lake 
superior this evening into 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-
401 pm edt thu jul 23 2026

.late this afternoon...southwest winds 15 to 25 knots. waves 3 to
6 feet occasionally to 8 feet. 
.tonight...southwest winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. waves 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. 

$$

fzus63 kmqt 232001
glfls 
expires:202607240800;;482481

open lake forecast for lake superior
national weather service marquette mi
401 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 will move over the northwest half of lake 
superior this evening into 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-
401 pm edt thu jul 23 2026

.late this afternoon...west winds 15 to 25 knots. waves 1 to
3 feet. 
.tonight...southwest winds 10 to 20 knots increasing to 15 to
25 knots after midnight. waves subsiding to 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 232001
glfls 
expires:202607240800;;482478

open lake forecast for lake superior
national weather service marquette mi
401 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 will move over the northwest half of lake 
superior this evening into 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-
401 pm edt thu jul 23 2026 /301 pm cdt thu jul 23 2026/

.late this afternoon...southwest winds 15 to 25 knots. waves 3 to
5 feet occasionally to 7 feet. 
.tonight...southwest winds 15 to 25 knots diminishing to 10 to
20 knots late. waves 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 232001
glfls 
expires:202607240800;;482483

open lake forecast for lake superior
national weather service marquette mi
401 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 will move over the northwest half of lake 
superior this evening into 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-
401 pm edt thu jul 23 2026

.late this afternoon...southwest winds 5 to 15 knots. waves 1 to
3 feet. 
.tonight...southwest winds 5 to 15 knots increasing to 10 to
20 knots after midnight. waves 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 5 feet occasionally to 7 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. 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 232001
glfls 
expires:202607240800;;482482

open lake forecast for lake superior
national weather service marquette mi
401 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 will move over the northwest half of lake 
superior this evening into 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-
401 pm edt thu jul 23 2026

.late this afternoon...southwest winds 15 to 25 knots. waves 3 to
6 feet occasionally to 8 feet. 
.tonight...southwest winds 10 to 20 knots increasing to 15 to
25 knots late. waves 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. 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 232001
glfls 
expires:202607240800;;482479

open lake forecast for lake superior
national weather service marquette mi
401 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 will move over the northwest half of lake 
superior this evening into 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-
401 pm edt thu jul 23 2026

.late this afternoon...southwest winds 20 to 30 knots. waves 3 to
6 feet occasionally to 8 feet. 
.tonight...southwest winds 15 to 25 knots. waves 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. 

$$