fzus61 kbuf 040202
glflo 
expires:202507040900;;837658

open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt thu jul 3 2025

for waters beyond five nautical miles of shore on lake ontario

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

.synopsis...an expansive 30.1 inch area of high pressure will build 
eastward across the great lakes tonight and friday...before drifting 
to the eastern seaboard saturday. a wavy cold frontal boundary is 
then forecast to slowly push southeastward across the upper great 
lakes and southern ontario during sunday, then across the lower 
great lakes on monday. a 30.1 inch surface high will build across 
the lower great lakes on tuesday.


loz063>065-040900-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 pm edt thu jul 3 2025

.overnight...northwest winds 5 to 15 knots becoming north.
waves 2 to 4 feet subsiding to 1 to 2 feet. 
.friday...north winds 5 to 10 knots becoming southwest. waves
1 foot or less. 
.friday night...southwest winds 5 to 10 knots becoming south.
waves 1 foot or less. 
.saturday...south winds 5 to 10 knots. waves 1 foot or less. 
.saturday night...south winds 5 to 15 knots. waves 2 feet or
less. 
.sunday...southwest winds 5 to 15 knots becoming south. waves
1 to 2 feet. 
.monday...southwest winds 5 to 10 knots becoming north. a chance
of showers and thunderstorms. waves 1 to 2 feet. 
.tuesday...north winds 5 to 10 knots. a chance of showers during
the day. waves 2 feet or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 040202
glflo 
expires:202507040900;;837657

open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt thu jul 3 2025

for waters beyond five nautical miles of shore on lake ontario

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

.synopsis...an expansive 30.1 inch area of high pressure will build 
eastward across the great lakes tonight and friday...before drifting 
to the eastern seaboard saturday. a wavy cold frontal boundary is 
then forecast to slowly push southeastward across the upper great 
lakes and southern ontario during sunday, then across the lower 
great lakes on monday. a 30.1 inch surface high will build across 
the lower great lakes on tuesday.


loz062-040900-
lake ontario open waters from the niagara river to hamlin beach-
1002 pm edt thu jul 3 2025

.overnight...northwest winds 5 to 15 knots becoming north.
waves 2 to 4 feet subsiding to 1 to 2 feet. 
.friday...north winds 10 knots or less becoming southwest. waves
1 foot or less. 
.friday night...south winds 5 to 10 knots. waves 1 foot or less. 
.saturday...south winds 5 to 15 knots. waves 2 feet or less. 
.saturday night...south winds 10 to 15 knots becoming southwest.
waves 1 to 2 feet. 
.sunday...southwest winds 10 to 15 knots. waves 1 to 3 feet. 
.monday...southwest winds around 10 knots becoming north. a
chance of showers and thunderstorms. waves 1 to 2 feet. 
.tuesday...northeast winds 5 to 10 knots becoming north. waves
2 feet or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 040127
glfle 
expires:202507040815;;836541

open lake forecast for lake erie
national weather service cleveland oh
927 pm edt thu jul 3 2025

for waters beyond five nautical miles of shore on lake erie

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

.synopsis...
a ridge averaging 30.10 inches builds from the western great 
lakes through friday before it exits slowly eastward this weekend.
this ridge evolution will allow a warm front to sweep northward 
across lake erie friday night. a cold front should drift 
southeastward across lake erie sunday night through monday 
evening. behind the front, another ridge averaging 30.10 inches 
should build from the upper midwest through this tuesday.


lez164>167-040815-
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-
927 pm edt thu jul 3 2025

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

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 040127
glfle 
expires:202507040815;;836542

open lake forecast for lake erie
national weather service cleveland oh
927 pm edt thu jul 3 2025

for waters beyond five nautical miles of shore on lake erie

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

.synopsis...
a ridge averaging 30.10 inches builds from the western great 
lakes through friday before it exits slowly eastward this weekend.
this ridge evolution will allow a warm front to sweep northward 
across lake erie friday night. a cold front should drift 
southeastward across lake erie sunday night through monday 
evening. behind the front, another ridge averaging 30.10 inches 
should build from the upper midwest through this tuesday.


lez061-168-169-040815-
ripley to buffalo ny extending from 5nm off shoreline to us-
canadian border-geneva-on-the-
lake to conneaut oh beyond 5 nm off shoreline to us-
canadian border-
conneaut oh to ripley ny beyond 5 nm off shoreline to us-
canadian border-
927 pm edt thu jul 3 2025

.rest of tonight...northwest winds 10 knots or less becoming
northeast. waves 1 foot or less. 
.friday...northeast winds less than 10 knots. waves 1 foot or
less. 
.friday night...east winds 10 knots or less becoming south. waves
1 foot or less. 
.saturday...south winds 10 knots or less becoming southwest.
waves 1 foot or less. 
.saturday night...southwest winds 10 knots or less becoming
south. waves 2 feet or less. 
.sunday...southwest winds 5 to 10 knots. waves 1 to 2 feet. 
.monday...southwest winds 5 to 10 knots becoming north. a chance
of showers and thunderstorms during the day. waves 1 to 2 feet. 
.tuesday...north winds 5 to 10 knots becoming northeast. waves
1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 040127
glfle 
expires:202507040815;;836540

open lake forecast for lake erie
national weather service cleveland oh
927 pm edt thu jul 3 2025

for waters beyond five nautical miles of shore on lake erie

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

.synopsis...
a ridge averaging 30.10 inches builds from the western great 
lakes through friday before it exits slowly eastward this weekend.
this ridge evolution will allow a warm front to sweep northward 
across lake erie friday night. a cold front should drift 
southeastward across lake erie sunday night through monday 
evening. behind the front, another ridge averaging 30.10 inches 
should build from the upper midwest through this tuesday.


lez162-163-040815-
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-
927 pm edt thu jul 3 2025

.rest of tonight...east winds 5 to 10 knots. isolated showers and
thunderstorms late this evening. waves 1 foot or less. 
.friday...east winds 5 to 10 knots. waves 1 foot or less. 
.friday night...southeast winds around 10 knots becoming south.
waves 1 foot or less. 
.saturday...southwest winds 5 to 10 knots becoming south. waves
1 foot or less. 
.saturday night...south winds 5 to 10 knots becoming southwest.
waves 2 feet or less. 
.sunday...southwest winds around 10 knots becoming west. waves
1 to 2 feet. 
.monday...west winds 5 to 10 knots becoming northeast. a chance
of showers and thunderstorms during the day. waves 1 foot or
less. 
.tuesday...northeast winds 5 to 10 knots becoming south. waves
1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 040157
glfsc 
expires:202507041000;;837280

lake st clair forecast
national weather service detroit/pontiac mi
957 pm edt thu jul 3 2025

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

.synopsis...high pressure, 30.10 inches, lingers over the region
through the first half of friday. a warm front slowly lifts
through the area friday into saturday with hotter and unsettled
conditions for the second half of the weekend.


lcz460-041000-
lake st clair-
957 pm edt thu jul 3 2025

.rest of tonight...northeast winds 5 to 10 knots. clear. waves 2
feet or less.
.friday...east winds 5 to 10 knots. sunny. waves 2 feet or less.
.friday night...southeast winds 10 to 15 knots becoming south 5 to
10 knots in the late evening and overnight. mostly clear. waves 2
feet or less.
.saturday...south winds 5 to 10 knots becoming southwest 10 to 15
knots in the late morning and afternoon. mostly sunny. waves 2 feet
or less.
.saturday night...south winds 10 to 15 knots. mostly clear. waves 2
feet or less.
.sunday...southwest winds 10 to 15 knots. sunny in the morning...
then a chance of showers and thunderstorms in the afternoon and 
evening. waves 2 feet or less.
.monday...northeast winds 10 to 15 knots. partly cloudy. a chance of
showers and thunderstorms. waves 2 feet or less.
.tuesday...northeast winds 5 to 10 knots. mostly clear. waves 2 feet
or less.

$$

fzus63 kdtx 040155
glflh 
expires:202507041000;;837222

open lake forecast for lake huron
national weather service detroit/pontiac mi
955 pm edt thu jul 3 2025

for waters beyond five nautical miles off shore on lake huron

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

.synopsis...high pressure, 30.10 inches, lingers over the region
through the first half of friday. a warm front slowly lifts
through the area friday into saturday with hotter and unsettled
conditions for the second half of the weekend.


lhz462>464-041000-
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-
955 pm edt thu jul 3 2025

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


$$

fzus63 kdtx 040155
glflh 
expires:202507041000;;837220

open lake forecast for lake huron
national weather service detroit/pontiac mi
955 pm edt thu jul 3 2025

for waters beyond five nautical miles off shore on lake huron

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

.synopsis...high pressure, 30.10 inches, lingers over the region
through the first half of friday. a warm front slowly lifts
through the area friday into saturday with hotter and unsettled
conditions for the second half of the weekend.


lhz361-041000-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
955 pm edt thu jul 3 2025

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


$$

fzus63 kdtx 040155
glflh 
expires:202507041000;;837221

open lake forecast for lake huron
national weather service detroit/pontiac mi
955 pm edt thu jul 3 2025

for waters beyond five nautical miles off shore on lake huron

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

.synopsis...high pressure, 30.10 inches, lingers over the region
through the first half of friday. a warm front slowly lifts
through the area friday into saturday with hotter and unsettled
conditions for the second half of the weekend.


lhz362-363-041000-
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-
955 pm edt thu jul 3 2025

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


$$

fzus63 kmkx 040143
glflm 
expires:202507040915;;836909

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
843 pm cdt thu jul 3 2025

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

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

.synopsis... 

high pressure around 30.0 inches over the ohio river valley 
will move to the east tonight into friday. light north to 
northeast winds today will become east to southeast tonight. 
winds will then shift south on friday, as a warm front moves 
north through the region.

south to southwest winds will then increase friday night into 
saturday night, as low pressure around 29.3 inches moves across
northern ontario into hudson bay. the low will pull a cold front 
through the region saturday night into sunday. northwest winds
will become north behind this front sunday and linger sunday
night.

mainly small chances for thunderstorms are forecast later tonight
into early friday morning across southern portions of the lake. 
more widespread chances for showers and thunderstorms are forecast
for later saturday into sunday, as the cold front crosses the 
lake.


lmz080-669-671-673-675-777-779-870-872-874-876-878-040915-
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-
843 pm cdt thu jul 3 2025

sheboygan wi to pentwater mi south...

.rest of tonight...northeast winds 5 to 10 kt veering to
southeast. chance of showers and thunderstorms overnight. waves
1 to 2 ft. 
.friday...south winds 10 to 15 kt increasing to 10 to 20 kt.
chance of showers and slight chance of thunderstorms in the
morning, then slight chance of showers and thunderstorms in the
afternoon. waves 1 to 3 ft. 
.friday night...south winds 10 to 20 kt becoming southwest 10 to
15 kt. waves 1 to 3 ft. 
.saturday...south winds 10 to 20 kt increasing to 15 to 25 kt.
waves 2 to 4 ft building to 4 to 6 ft occasionally to 8 ft. 
.saturday night...south winds 15 to 25 kt becoming southwest
10 to 20 kt. chance of showers and thunderstorms overnight. waves
4 to 6 ft occasionally to 8 ft. 
.sunday...southwest winds 10 to 20 kt veering to northwest.
chance of showers in the morning, then chance of showers and
thunderstorms in the afternoon. waves 3 to 5 ft. 
.sunday night...north winds 10 to 20 kt. waves 1 to 3 ft. 
.monday...north winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 3 ft. 
.tuesday...northeast winds 5 to 10 kt becoming east 10 to 15 kt.
waves 1 to 2 ft.  

$$

fzus63 kmkx 040143
glflm 
expires:202507040915;;836908

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
843 pm cdt thu jul 3 2025

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

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

.synopsis... 

high pressure around 30.0 inches over the ohio river valley 
will move to the east tonight into friday. light north to 
northeast winds today will become east to southeast tonight. 
winds will then shift south on friday, as a warm front moves 
north through the region.

south to southwest winds will then increase friday night into 
saturday night, as low pressure around 29.3 inches moves across
northern ontario into hudson bay. the low will pull a cold front 
through the region saturday night into sunday. northwest winds
will become north behind this front sunday and linger sunday
night.

mainly small chances for thunderstorms are forecast later tonight
into early friday morning across southern portions of the lake. 
more widespread chances for showers and thunderstorms are forecast
for later saturday into sunday, as the cold front crosses the 
lake.


lmz261-362-364-366-563-565-567-868-040915-
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-
843 pm cdt thu jul 3 2025

sheboygan wi to pentwater mi north...

.rest of tonight...east winds 5 to 10 kt becoming southeast.
waves 1 to 2 ft. 
.friday...southeast winds 10 to 15 kt becoming south 10 to 20 kt.
slight chance of showers and thunderstorms in the afternoon.
waves 1 to 3 ft. 
.friday night...south winds 10 to 20 kt becoming southwest. waves
2 to 4 ft. 
.saturday...southwest winds 15 to 25 kt becoming south to 30 kt.
waves 2 to 4 ft building to 4 to 6 ft occasionally to 8 ft. 
.saturday night...southwest winds to 30 kt diminishing to 10 to
20 kt overnight. showers likely with a chance of thunderstorms.
waves 4 to 6 ft occasionally to 8 ft. 
.sunday...west winds 10 to 20 kt becoming north. chance of
showers. waves 2 to 4 ft. 
.sunday night...north winds 10 to 20 kt. waves 1 to 3 ft. 
.monday...north winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 3 ft. 
.tuesday...east winds 5 to 10 kt becoming south 10 to 15 kt.
waves 1 ft or less.  

$$

fzus63 kmqt 040202
glfls 
expires:202507040800;;837630

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt thu jul 3 2025

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

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

.synopsis...

30.0 inch ridging is centered over the great lakes tonight. by 
friday morning, the ridging will build to 30.1 inches as it shifts 
over southern ontario and the lower great lakes while a 29.4 inch 
low over northern saskatchewan drapes a trough of 29.7 inches over 
the northern great plains. by saturday, the ridge will shift over 
the east coast and the low moves over hudson bay, pressing troughing 
of 29.8 inches over lake superior. the trough then lingers over the 
lake through sunday morning, with 30.1 inch high pressure building 
over the plains. this high moves over the great lakes basin for the 
early portions of next week.



lsz162-040800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 pm edt thu jul 3 2025 /901 pm cdt thu jul 3 2025/

.rest of tonight...northeast winds 5 to 15 knots. a chance of
showers and thunderstorms after midnight. waves calm to 2 feet. 
.friday...east winds 10 to 20 knots. scattered showers and
thunderstorms through early afternoon. waves calm to 2 feet. 
.friday night...northeast winds 10 to 20 knots veering south
after midnight. scattered showers through midnight. scattered
thunderstorms. showers likely after midnight. waves calm to
2 feet. 
.saturday...southwest winds 10 to 20 knots veering west by mid
afternoon. showers and a chance of thunderstorms. waves calm to
2 feet. 
.saturday night...northwest winds 10 to 20 knots veering north
after midnight. a chance of showers and a slight chance of
thunderstorms through midnight. waves calm to 2 feet. 
.sunday...northeast winds 10 to 20 knots becoming east 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.sunday night...northeast winds 5 to 15 knots backing west after
midnight. waves calm to 2 feet. 
.monday...south winds 5 to 15 knots backing northeast. waves calm
to 2 feet. 
.tuesday...east winds 5 to 15 knots backing northeast. a chance
of showers. waves calm to 2 feet. 

$$

fzus63 kmqt 040202
glfls 
expires:202507040800;;837631

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt thu jul 3 2025

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

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

.synopsis...

30.0 inch ridging is centered over the great lakes tonight. by 
friday morning, the ridging will build to 30.1 inches as it shifts 
over southern ontario and the lower great lakes while a 29.4 inch 
low over northern saskatchewan drapes a trough of 29.7 inches over 
the northern great plains. by saturday, the ridge will shift over 
the east coast and the low moves over hudson bay, pressing troughing 
of 29.8 inches over lake superior. the trough then lingers over the 
lake through sunday morning, with 30.1 inch high pressure building 
over the plains. this high moves over the great lakes basin for the 
early portions of next week.



lsz263-040800-
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 3 2025

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

$$

fzus63 kmqt 040202
glfls 
expires:202507040800;;837632

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt thu jul 3 2025

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

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

.synopsis...

30.0 inch ridging is centered over the great lakes tonight. by 
friday morning, the ridging will build to 30.1 inches as it shifts 
over southern ontario and the lower great lakes while a 29.4 inch 
low over northern saskatchewan drapes a trough of 29.7 inches over 
the northern great plains. by saturday, the ridge will shift over 
the east coast and the low moves over hudson bay, pressing troughing 
of 29.8 inches over lake superior. the trough then lingers over the 
lake through sunday morning, with 30.1 inch high pressure building 
over the plains. this high moves over the great lakes basin for the 
early portions of next week.



lsz264-040800-
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 3 2025

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

$$

fzus63 kmqt 040202
glfls 
expires:202507040800;;837633

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt thu jul 3 2025

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

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

.synopsis...

30.0 inch ridging is centered over the great lakes tonight. by 
friday morning, the ridging will build to 30.1 inches as it shifts 
over southern ontario and the lower great lakes while a 29.4 inch 
low over northern saskatchewan drapes a trough of 29.7 inches over 
the northern great plains. by saturday, the ridge will shift over 
the east coast and the low moves over hudson bay, pressing troughing 
of 29.8 inches over lake superior. the trough then lingers over the 
lake through sunday morning, with 30.1 inch high pressure building 
over the plains. this high moves over the great lakes basin for the 
early portions of next week.



lsz265-040800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
1001 pm edt thu jul 3 2025

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

$$

fzus63 kmqt 040202
glfls 
expires:202507040800;;837634

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt thu jul 3 2025

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

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

.synopsis...

30.0 inch ridging is centered over the great lakes tonight. by 
friday morning, the ridging will build to 30.1 inches as it shifts 
over southern ontario and the lower great lakes while a 29.4 inch 
low over northern saskatchewan drapes a trough of 29.7 inches over 
the northern great plains. by saturday, the ridge will shift over 
the east coast and the low moves over hudson bay, pressing troughing 
of 29.8 inches over lake superior. the trough then lingers over the 
lake through sunday morning, with 30.1 inch high pressure building 
over the plains. this high moves over the great lakes basin for the 
early portions of next week.



lsz266-040800-
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 3 2025

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

$$

fzus63 kmqt 040202
glfls 
expires:202507040800;;837635

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt thu jul 3 2025

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

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

.synopsis...

30.0 inch ridging is centered over the great lakes tonight. by 
friday morning, the ridging will build to 30.1 inches as it shifts 
over southern ontario and the lower great lakes while a 29.4 inch 
low over northern saskatchewan drapes a trough of 29.7 inches over 
the northern great plains. by saturday, the ridge will shift over 
the east coast and the low moves over hudson bay, pressing troughing 
of 29.8 inches over lake superior. the trough then lingers over the 
lake through sunday morning, with 30.1 inch high pressure building 
over the plains. this high moves over the great lakes basin for the 
early portions of next week.



lsz267-040800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
1001 pm edt thu jul 3 2025

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

$$