fzus61 kbuf 230802
glflo 
expires:202607231500;;454557

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


loz062-231500-
lake ontario open waters from the niagara river to hamlin beach-
402 am edt thu jul 23 2026

.today...west winds 5 to 10 knots becoming southwest. waves
2 feet or less. 
.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 southeast.
waves 1 foot or less. 
.saturday...south winds 10 knots or less becoming southwest.
waves 1 foot or less. 
.sunday...southwest winds less than 10 knots. a chance of
showers. 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 1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 230802
glflo 
expires:202607231500;;454558

open lake forecast for lake ontario
national weather service buffalo ny
402 am 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>065-231500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 am edt thu jul 23 2026

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

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 230735
glfle 
expires:202607231415;;453858

open lake forecast for lake erie
national weather service cleveland oh
335 am 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 builds into the region tonight and 
will slowly shift to the east through saturday. pressure decreases
with a trough averaging 29.90 inches settling over lake erie on 
sunday, persisting into monday.



lez164>167-231415-
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-
335 am edt thu jul 23 2026

.today...north winds 10 knots or less. a slight chance of
waterspouts early. a slight chance of showers early. waves 1 foot
or less. 
.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. waves 1 foot or
less. 
.sunday...west winds 5 to 10 knots becoming southwest. a chance
of showers sunday night. waves 2 feet or less. 
.monday...southwest winds 5 to 15 knots. a chance of showers and
thunderstorms during the day, then showers likely with a chance
of thunderstorms monday night. waves 1 to 2 feet building to 2 to
4 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 230735
glfle 
expires:202607231415;;453859

open lake forecast for lake erie
national weather service cleveland oh
335 am 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 builds into the region tonight and 
will slowly shift to the east through saturday. pressure decreases
with a trough averaging 29.90 inches settling over lake erie on 
sunday, persisting into monday.



lez061-168-169-231415-
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-
335 am edt thu jul 23 2026

.today...northwest winds 10 knots or less becoming west. a slight
chance of waterspouts early. waves 2 feet or less. 
.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 10 knots or less becoming southwest.
waves 1 foot or less. 
.sunday...southwest winds 5 to 10 knots. a chance of showers and
thunderstorms sunday night. waves 2 feet or less. 
.monday...southwest winds 5 to 15 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. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 230735
glfle 
expires:202607231415;;453857

open lake forecast for lake erie
national weather service cleveland oh
335 am 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 builds into the region tonight and 
will slowly shift to the east through saturday. pressure decreases
with a trough averaging 29.90 inches settling over lake erie on 
sunday, persisting into monday.



lez162-163-231415-
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-
335 am edt thu jul 23 2026

.today...north winds 10 knots or less becoming southeast. a
slight chance of waterspouts early. waves 1 foot or less. 
.tonight...southeast winds 10 knots or less becoming south. waves
1 foot or less. 
.friday...southwest winds 10 knots or less becoming east. waves
1 foot or less. 
.friday night...east winds 10 knots or less becoming southwest.
waves 1 foot or less. 
.saturday...west winds 10 knots or less. waves 1 foot or less. 
.sunday...west winds 10 knots or less becoming southwest. waves
1 foot or less. 
.monday...southwest winds 10 to 15 knots. a chance of showers and
thunderstorms during the day, then showers likely with a chance
of thunderstorms monday night. waves 1 to 2 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 230732
glfsc 
expires:202607231545;;453757

lake st clair forecast
national weather service detroit/pontiac mi
332 am 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 minnesota, will
slowly track east through the southern great lakes over the next
couple of days. dry weather and generally light winds can be
expected for thursday and friday.


lcz460-231545-
lake st clair-
332 am edt thu jul 23 2026

.today...northwest winds 5 to 10 knots early in the morning becoming
light and variable. sunny. waves 2 feet or less.
.tonight...light and variable winds becoming south 5 to 10 knots by
midnight...then becoming light and variable early in the morning.
clear. waves 2 feet or less.
.friday...light and variable winds becoming southeast 5 to 10 knots
early 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 south 5 to 10 knots in
the afternoon and evening. mostly clear. waves 2 feet or less.
.sunday...southeast winds 5 to 10 knots. partly cloudy. a chance of
showers and thunderstorms. 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.

$$

fzus63 kdtx 230732
glflh 
expires:202607231545;;453738

open lake forecast for lake huron
national weather service detroit/pontiac mi
332 am 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 minnesota, will
slowly track east through the southern great lakes over the next
couple of days. dry weather and generally light winds can be
expected for thursday and friday.


lhz361-231545-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
332 am edt thu jul 23 2026

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


$$

fzus63 kdtx 230732
glflh 
expires:202607231545;;453739

open lake forecast for lake huron
national weather service detroit/pontiac mi
332 am 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 minnesota, will
slowly track east through the southern great lakes over the next
couple of days. dry weather and generally light winds can be
expected for thursday and friday.


lhz362-363-231545-
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-
332 am edt thu jul 23 2026

.today...west winds 5 to 10 knots backing to the south late in
the afternoon. waves 1 to 3 feet. 
.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...southwest winds 5 to 10 knots backing to the southeast
early in the afternoon. waves 2 feet or less building to 2 to
4 feet early in the afternoon. 
.friday night...south winds 10 to 15 knots. waves 2 to 4 feet. 
.saturday...south winds 5 to 10 knots increasing to 10 to
15 knots late in the morning...then decreasing to 5 to 10 knots
late in the evening. a chance of showers late in the evening.
waves 1 to 3 feet building to 3 to 5 feet late in the morning...
then subsiding to 2 to 4 feet late in the evening. 
.sunday...light and variable winds becoming east 5 to 10 knots by
midnight. a chance of showers early in the morning. a chance of
showers by midnight. waves 2 feet or less. 
.monday...southwest winds 5 to 10 knots backing to the south . a
chance of showers. waves 1 to 3 feet. 


$$

fzus63 kdtx 230732
glflh 
expires:202607231545;;453740

open lake forecast for lake huron
national weather service detroit/pontiac mi
332 am 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 minnesota, will
slowly track east through the southern great lakes over the next
couple of days. dry weather and generally light winds can be
expected for thursday and friday.


lhz462>464-231545-
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-
332 am edt thu jul 23 2026

.today...west winds 5 to 10 knots in the morning becoming light
and variable. waves 1 to 3 feet. 
.tonight...southeast winds 5 to 10 knots veering to the south
after midnight. 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 early 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. 
.sunday...west winds 5 to 10 knots early in the morning becoming
light and variable...then becoming southeast 5 to 10 knots by
midnight. a chance of showers by midnight. waves 2 feet or less. 
.monday...south winds 5 to 10 knots becoming east 10 to 15 knots
by midnight. a chance of showers early in the morning...then
showers likely and a chance of thunderstorms until early evening.
a chance of showers by midnight. waves 1 to 3 feet. 


$$

fzus63 kmkx 230806
glflm 
expires:202607231515;;454988

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
306 am 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 today, as high 
pressure around 30.1 inches crosses wisconsin and southern lake 
michigan. southerly winds develop by friday, as the high move 
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 over lake michigan. 

the low will attempt to pull a cold front into the western great 
lakes on saturday, with the boundary slowly advancing south across
the waters through saturday night. this will result in returning 
thunderstorm chances. 

a stationary front is expected to sit across lake michigan 
through the middle of next week, so there will be switches between
northerly and southerly winds at times. this front will be the 
focus for several rounds of thunderstorms, possibly strong to 
severe.


lmz080-669-671-673-675-777-779-870-872-874-876-878-231515-
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-
306 am cdt thu jul 23 2026

sheboygan wi to pentwater mi south...

.today...west winds 10 to 15 kt backing to south 10 to 20 kt.
waves 1 to 2 ft. 
.tonight...south winds 10 to 20 kt becoming southwest 10 to
15 kt. waves 1 to 3 ft. 
.friday...southwest winds 10 to 15 kt becoming south 10 to 20 kt
early in the afternoon, then increasing to 15 to 25 kt late.
waves 1 to 3 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. 
.saturday...southwest winds 15 to 25 kt becoming south to 30 kt.
waves 3 to 5 ft. 
.saturday night...southwest winds 15 to 25 kt becoming west 10 to
20 kt. waves 3 to 5 ft subsiding to 1 to 3 ft. 
.sunday...northwest winds 10 to 20 kt backing to south. waves
1 to 3 ft. 
.monday...southwest winds 15 to 25 kt. chance of showers. waves
3 to 5 ft.  

$$

fzus63 kmkx 230806
glflm 
expires:202607231515;;454987

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
306 am 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 today, as high 
pressure around 30.1 inches crosses wisconsin and southern lake 
michigan. southerly winds develop by friday, as the high move 
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 over lake michigan. 

the low will attempt to pull a cold front into the western great 
lakes on saturday, with the boundary slowly advancing south across
the waters through saturday night. this will result in returning 
thunderstorm chances. 

a stationary front is expected to sit across lake michigan 
through the middle of next week, so there will be switches between
northerly and southerly winds at times. this front will be the 
focus for several rounds of thunderstorms, possibly strong to 
severe.


lmz261-362-364-366-563-565-567-868-231515-
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-
306 am cdt thu jul 23 2026

sheboygan wi to pentwater mi north...

.today...west winds 10 to 20 kt increasing to 15 to 25 kt late
this morning, then becoming southwest early this afternoon
increasing to 30 kt late. waves 2 to 4 ft. 
.tonight...southwest winds 15 to 25 kt. waves 2 to 4 ft. 
.friday...southwest winds 10 to 20 kt becoming south to 30 kt.
waves 1 to 3 ft building to 2 to 4 ft. 
.friday night...south winds to 30 kt becoming southwest. waves
3 to 5 ft. 
.saturday...southwest winds to 30 kt becoming south. chance of
showers in the morning. waves 3 to 5 ft. 
.saturday night...southwest winds to 30 kt veering to northwest
10 to 20 kt. chance of showers. waves 3 to 5 ft subsiding to 2 to
4 ft. 
.sunday...north winds 10 to 15 kt backing to south 10 to 20 kt.
waves 1 to 3 ft. 
.monday...southwest winds 10 to 20 kt increasing to 15 to 25 kt.
chance of showers. waves 3 to 5 ft.  

$$

fzus63 kmqt 230803 cca
glfls 
expires:202607232000;;454678

open lake forecast for lake superior...corrected
national weather service marquette mi
403 am 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... 

while ridging averaging around 30.0 inches looks to remain over lake 
superior today, a weak 29.9 to 30.0 inch low is looking to move over 
the northwestern half of the lake tonight. as a low around 29.3 
inches lifts from far northern ontario into hudson bay friday night 
into saturday morning, expect troughing of around 29.8 inches to 
move into lake superior in response by saturday morning; troughing 
of at least 29.8 inches looks to remain over the lake for the rest 
of the day. while weak ridging of 29.8 to 29.9 inches develops over 
lake superior sunday morning, a 29.5 inch clipper low moves into the 
upper great lakes or upper midwest by monday. 


lsz162-232000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
403 am edt thu jul 23 2026 /303 am cdt thu jul 23 2026/

.early this morning...southwest winds 15 to 25 knots. waves calm
to 2 feet. 
.today...southwest winds 15 to 25 knots. waves building to 3 to
5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. 
.tonight...southwest winds 10 to 20 knots increasing to 15 to
25 knots after midnight, then diminishing to 10 to 20 knots late.
waves subsiding to 1 to 3 feet. 
.friday...southwest winds 10 to 20 knots backing south late.
waves subsiding to calm to 2 feet. 
.friday night...southwest winds 15 to 25 knots. a slight chance
of showers through midnight. a chance of thunderstorms. showers
after midnight. waves building to 3 to 5 feet occasionally to
7 feet. 
.saturday...southwest winds 10 to 20 knots diminishing to 5 to
15 knots by mid afternoon. waves subsiding to calm to 2 feet. 
.saturday night...northeast winds 5 to 15 knots. waves calm to
2 feet. 
.sunday...east winds 5 to 15 knots backing northeast. a chance of
showers. waves calm to 2 feet. 
.monday...northeast winds 5 to 15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 230803 cca
glfls 
expires:202607232000;;454679

open lake forecast for lake superior...corrected
national weather service marquette mi
403 am 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... 

while ridging averaging around 30.0 inches looks to remain over lake 
superior today, a weak 29.9 to 30.0 inch low is looking to move over 
the northwestern half of the lake tonight. as a low around 29.3 
inches lifts from far northern ontario into hudson bay friday night 
into saturday morning, expect troughing of around 29.8 inches to 
move into lake superior in response by saturday morning; troughing 
of at least 29.8 inches looks to remain over the lake for the rest 
of the day. while weak ridging of 29.8 to 29.9 inches develops over 
lake superior sunday morning, a 29.5 inch clipper low moves into the 
upper great lakes or upper midwest by monday. 


lsz263-232000-
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-
403 am edt thu jul 23 2026

.early this morning...west winds 10 to 20 knots. waves 2 to
4 feet. 
.today...southwest winds 15 to 25 knots. waves building to 3 to
6 feet occasionally to 8 feet. 
.tonight...southwest winds 15 to 25 knots diminishing to 10 to
20 knots late. waves subsiding to 1 to 3 feet, then building to
2 to 4 feet. 
.friday...southwest winds 15 to 25 knots backing south late.
waves subsiding to 1 to 3 feet. 
.friday night...south winds 15 to 25 knots veering southwest
after midnight. a slight chance of showers through midnight, then
showers and a chance of thunderstorms after midnight. waves
building to 3 to 6 feet occasionally to 8 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...east winds 5 to 15 knots becoming northeast
less than 10 knots after midnight. waves calm to 2 feet. 
.sunday...east winds 5 to 15 knots. a chance of showers. waves
calm to 2 feet. 
.monday...northeast winds 5 to 15 knots backing north. waves calm
to 2 feet. 

$$

fzus63 kmqt 230803 cca
glfls 
expires:202607232000;;454680

open lake forecast for lake superior...corrected
national weather service marquette mi
403 am 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... 

while ridging averaging around 30.0 inches looks to remain over lake 
superior today, a weak 29.9 to 30.0 inch low is looking to move over 
the northwestern half of the lake tonight. as a low around 29.3 
inches lifts from far northern ontario into hudson bay friday night 
into saturday morning, expect troughing of around 29.8 inches to 
move into lake superior in response by saturday morning; troughing 
of at least 29.8 inches looks to remain over the lake for the rest 
of the day. while weak ridging of 29.8 to 29.9 inches develops over 
lake superior sunday morning, a 29.5 inch clipper low moves into the 
upper great lakes or upper midwest by monday. 


lsz264-232000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
403 am edt thu jul 23 2026

.early this morning...west winds 10 to 20 knots. waves 2 to
4 feet. 
.today...southwest winds 15 to 25 knots. waves building to 3 to
6 feet occasionally to 8 feet. 
.tonight...southwest winds 10 to 20 knots. 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
after midnight. a slight chance of showers through midnight, then
showers and a chance of thunderstorms after midnight. waves
building to 3 to 6 feet occasionally to 8 feet. 
.saturday...southwest winds 10 to 20 knots becoming west 5 to
15 knots by mid afternoon. a chance of showers through early
afternoon. waves subsiding to 1 to 3 feet. 
.saturday night...east winds less than 10 knots. waves subsiding
to calm to 2 feet. 
.sunday...southeast winds 5 to 15 knots. a chance of showers.
waves calm to 2 feet. 
.monday...northeast winds 5 to 15 knots backing north. waves calm
to 2 feet. 

$$

fzus63 kmqt 230803 cca
glfls 
expires:202607232000;;454681

open lake forecast for lake superior...corrected
national weather service marquette mi
403 am 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... 

while ridging averaging around 30.0 inches looks to remain over lake 
superior today, a weak 29.9 to 30.0 inch low is looking to move over 
the northwestern half of the lake tonight. as a low around 29.3 
inches lifts from far northern ontario into hudson bay friday night 
into saturday morning, expect troughing of around 29.8 inches to 
move into lake superior in response by saturday morning; troughing 
of at least 29.8 inches looks to remain over the lake for the rest 
of the day. while weak ridging of 29.8 to 29.9 inches develops over 
lake superior sunday morning, a 29.5 inch clipper low moves into the 
upper great lakes or upper midwest by monday. 


lsz265-232000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
403 am edt thu jul 23 2026

.early this morning...west winds 15 to 25 knots. waves 1 to
3 feet. 
.today...west winds 15 to 25 knots diminishing to 10 to 20 knots
in the afternoon. waves subsiding to calm to 2 feet. 
.tonight...southwest winds 10 to 20 knots. waves calm to 2 feet. 
.friday...southwest winds 10 to 20 knots backing south in the
afternoon. waves building to 1 to 3 feet. 
.friday night...south winds 15 to 25 knots veering southwest
after midnight. showers likely and a slight chance of
thunderstorms after midnight. waves building to 2 to 4 feet. 
.saturday...southwest winds 10 to 20 knots becoming west 5 to
15 knots by mid afternoon. a chance of showers. waves subsiding
to calm to 2 feet. 
.saturday night...east winds 5 to 15 knots. waves calm to 2 feet.
.sunday...southeast winds 5 to 15 knots becoming southwest 10 to
20 knots. showers likely. waves calm to 2 feet. 
.monday...north winds 10 to 20 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 230803 cca
glfls 
expires:202607232000;;454682

open lake forecast for lake superior...corrected
national weather service marquette mi
403 am 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... 

while ridging averaging around 30.0 inches looks to remain over lake 
superior today, a weak 29.9 to 30.0 inch low is looking to move over 
the northwestern half of the lake tonight. as a low around 29.3 
inches lifts from far northern ontario into hudson bay friday night 
into saturday morning, expect troughing of around 29.8 inches to 
move into lake superior in response by saturday morning; troughing 
of at least 29.8 inches looks to remain over the lake for the rest 
of the day. while weak ridging of 29.8 to 29.9 inches develops over 
lake superior sunday morning, a 29.5 inch clipper low moves into the 
upper great lakes or upper midwest by monday. 


lsz266-232000-
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-
403 am edt thu jul 23 2026

.early this morning...west winds 15 to 25 knots. waves 2 to
4 feet. 
.today...west winds 15 to 25 knots backing southwest late. waves
building to 3 to 6 feet occasionally to 8 feet. 
.tonight...southwest winds 10 to 20 knots. waves subsiding to
1 to 3 feet, then building to 2 to 4 feet. 
.friday...southwest winds 10 to 20 knots backing south in the
afternoon, then increasing to 15 to 25 knots late. waves
subsiding to 1 to 3 feet, then building to 2 to 4 feet. 
.friday night...south winds 15 to 25 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 10 to 20 knots diminishing to 5 to
15 knots by mid afternoon. showers through early afternoon. a
chance of showers by mid afternoon. waves subsiding to 1 to
3 feet. 
.saturday night...northeast winds 5 to 15 knots. waves subsiding
to calm to 2 feet. 
.sunday...southeast winds 5 to 15 knots becoming south 10 to
20 knots. a chance of showers. waves calm to 2 feet. 
.monday...north winds 10 to 20 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 230803 cca
glfls 
expires:202607232000;;454683

open lake forecast for lake superior...corrected
national weather service marquette mi
403 am 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... 

while ridging averaging around 30.0 inches looks to remain over lake 
superior today, a weak 29.9 to 30.0 inch low is looking to move over 
the northwestern half of the lake tonight. as a low around 29.3 
inches lifts from far northern ontario into hudson bay friday night 
into saturday morning, expect troughing of around 29.8 inches to 
move into lake superior in response by saturday morning; troughing 
of at least 29.8 inches looks to remain over the lake for the rest 
of the day. while weak ridging of 29.8 to 29.9 inches develops over 
lake superior sunday morning, a 29.5 inch clipper low moves into the 
upper great lakes or upper midwest by monday. 


lsz267-232000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
403 am edt thu jul 23 2026

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

$$