fzus61 kbuf 031403
glflo 
expires:202608032100;;555467

open lake forecast for lake ontario
national weather service buffalo ny
1003 am edt mon aug 3 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...an elongated 29.7 inch low will exit the lower great 
lakes through today. a 30.0 inch high will then build east across 
ontario and quebec monday through tuesday. a 29.9 inch low will move 
into the lower great lakes wednesday with a slow-moving frontal 
boundary approaching from the west thursday and friday.


loz062-032100-
lake ontario open waters from the niagara river to hamlin beach-
1003 am edt mon aug 3 2026

.rest of today...northwest winds 15 to 25 knots becoming west. a
chance of showers late this morning. waves 3 to 6 feet subsiding
to 2 to 4 feet. 
.tonight...west winds 10 to 15 knots diminishing to less than
10 knots. waves 1 to 3 feet. 
.tuesday...west winds less than 10 knots becoming northwest.
waves 1 foot or less. 
.tuesday night...east winds less than 10 knots becoming south.
waves 1 foot or less. 
.wednesday...southwest winds 10 knots or less becoming south. a
chance of showers wednesday night. waves 1 foot or less. 
.thursday...southwest winds less than 10 knots. a chance of
showers and thunderstorms. waves 1 foot or less. 
.friday...southwest winds less than 10 knots. a chance of showers
and thunderstorms. waves 1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 031403
glflo 
expires:202608032100;;555468

open lake forecast for lake ontario
national weather service buffalo ny
1003 am edt mon aug 3 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...an elongated 29.7 inch low will exit the lower great 
lakes through today. a 30.0 inch high will then build east across 
ontario and quebec monday through tuesday. a 29.9 inch low will move 
into the lower great lakes wednesday with a slow-moving frontal 
boundary approaching from the west thursday and friday.


loz063>065-032100-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1003 am edt mon aug 3 2026

.rest of today...northwest winds 15 to 25 knots becoming west.
showers likely late this morning, then a chance of showers early
this afternoon. waves 4 to 7 feet subsiding to 3 to 6 feet. waves
occasionally around 9 feet. 
.tonight...west winds 15 to 20 knots becoming northwest 5 to
15 knots. waves 3 to 5 feet subsiding to 1 to 3 feet. 
.tuesday...west winds 5 to 10 knots becoming northwest. waves
2 feet or less. 
.tuesday night...northeast winds 10 knots or less becoming south.
waves 1 foot or less. 
.wednesday...south winds 10 knots or less. a chance of showers
and thunderstorms wednesday night. waves 1 foot or less. 
.thursday...south winds 10 knots or less becoming southwest. a
chance of showers and thunderstorms. waves 1 foot or less. 
.friday...southwest winds 10 knots or less. a chance of showers
and thunderstorms. waves 1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 031347
glfle 
expires:202608032015;;554948

open lake forecast for lake erie
national weather service cleveland oh
947 am edt mon aug 3 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 30.00 inches will build over the lake today. this
system will move east on tuesday and remain influential on the
lake through the first part of wednesday. a trough averaging 29.90
inches will enter the great lakes region on wednesday and several
weak systems will move along this feature through the weekend.


lez162-163-032015-
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-
947 am edt mon aug 3 2026

.this afternoon...north winds 5 to 15 knots becoming northeast
less than 10 knots. waves 1 to 3 feet subsiding to 1 foot or
less. 
.tonight...east winds 10 knots or less becoming southeast. waves
1 foot or less. 
.tuesday...southwest winds less than 10 knots. waves 1 foot or
less. 
.tuesday night...southeast winds less than 10 knots becoming
south. waves 1 foot or less. 
.wednesday...southwest winds 10 knots or less. waves 1 foot or
less. 
.thursday...southwest winds 5 to 10 knots. a chance of showers
and thunderstorms during the day, then showers likely with a
chance of thunderstorms thursday night. waves 1 foot or less. 
.friday...southwest winds 10 knots or less. a chance of showers
and thunderstorms during the day. waves 1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 031347
glfle 
expires:202608032015;;554949

open lake forecast for lake erie
national weather service cleveland oh
947 am edt mon aug 3 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 30.00 inches will build over the lake today. this
system will move east on tuesday and remain influential on the
lake through the first part of wednesday. a trough averaging 29.90
inches will enter the great lakes region on wednesday and several
weak systems will move along this feature through the weekend.


lez164>168-032015-
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-geneva-on-
the-lake to conneaut oh beyond 5 nm off shoreline to us-
canadian border-
947 am edt mon aug 3 2026

.this afternoon...north winds 15 to 20 knots diminishing to 5 to
10 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.tonight...north winds 5 to 15 knots becoming east less than
10 knots. waves 2 feet or less. 
.tuesday...south winds less than 10 knots becoming northeast.
waves 1 foot or less. 
.tuesday night...east winds less than 10 knots becoming
southeast. waves 1 foot or less. 
.wednesday...northwest winds 10 knots or less becoming south.
waves 1 foot or less. 
.thursday...southwest winds 10 knots or less. showers likely with
a chance of thunderstorms thursday night. waves 1 foot or less. 
.friday...southwest winds 10 knots or less. a chance of showers
and thunderstorms during the day, then a chance of showers friday
night. waves 1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 031347
glfle 
expires:202608032015;;554950

open lake forecast for lake erie
national weather service cleveland oh
947 am edt mon aug 3 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 30.00 inches will build over the lake today. this
system will move east on tuesday and remain influential on the
lake through the first part of wednesday. a trough averaging 29.90
inches will enter the great lakes region on wednesday and several
weak systems will move along this feature through the weekend.


lez061-169-032015-
ripley to buffalo ny extending from 5nm off shoreline to us-
canadian border-
conneaut oh to ripley ny beyond 5 nm off shoreline to us-
canadian border-
947 am edt mon aug 3 2026

.this afternoon...northwest winds 5 to 15 knots becoming west.
waves 1 to 3 feet. 
.tonight...west winds 10 knots or less becoming east. waves
2 feet or less. 
.tuesday...south winds less than 10 knots becoming north. waves
1 foot or less. 
.tuesday night...northeast winds 10 knots or less becoming
southeast. waves 1 foot or less. 
.wednesday...south winds 10 knots or less. a chance of showers
and thunderstorms wednesday night. waves 1 foot or less. 
.thursday...southwest winds 10 knots or less. a chance of showers
during the day, then showers likely with a chance of
thunderstorms thursday night. waves 1 foot or less. 
.friday...southwest winds 10 knots or less. a chance of showers
and thunderstorms during the day, then a chance of showers friday
night. waves 1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 031346
glfsc 
expires:202608032200;;554872

lake st clair forecast
national weather service detroit/pontiac mi
946 am edt mon aug 3 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, 30.00 inches, will build into the
region from the west today offering dry weather and weaker winds
through mid-week. a slow moving frontal boundary will drift in
from the west for the latter half of the week leading to future
opportunities for showers and thunderstorms.


lcz460-032200-
lake st clair-
946 am edt mon aug 3 2026

.rest of today...north winds 10 to 15 knots diminishing to 5 to 10
knots in the afternoon. sunny. waves 2 feet or less.
.tonight...northeast winds 5 to 10 knots this evening becoming light
and variable. clear. waves 2 feet or less.
.tuesday...light and variable winds becoming south 5 to 10 knots in
the late morning and afternoon. sunny. waves 2 feet or less.
.tuesday night...south winds 5 to 10 knots. clear. waves 2 feet or
less.
.wednesday...light and variable winds becoming south 5 to 10 knots
in the afternoon and evening. sunny becoming mostly clear. waves 2
feet or less.
.thursday...southwest winds 5 to 10 knots. partly cloudy. a chance
of showers and thunderstorms. waves 2 feet or less.
.friday...south winds 5 to 10 knots. partly cloudy. a chance of
showers and thunderstorms. waves 2 feet or less.

$$

fzus63 kdtx 031344
glflh 
expires:202608032145;;554868

open lake forecast for lake huron
national weather service detroit/pontiac mi
944 am edt mon aug 3 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, 30.00 inches, will build into the
region from the west today offering dry weather and weaker winds
through mid-week. a slow moving frontal boundary will drift in
from the west for the latter half of the week leading to future
opportunities for showers and thunderstorms.


lhz362-363-032145-
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-
944 am edt mon aug 3 2026

.rest of today...north winds 5 to 10 knots. waves 1 to 3 feet. 
.tonight...light and variable winds becoming south 5 to 10 knots
after midnight. waves 2 feet or less. 
.tuesday...southwest winds 5 to 10 knots becoming south 10 to
15 knots early in the afternoon. waves 2 feet or less building to
3 to 5 feet early in the afternoon. 
.tuesday night...south winds 15 to 20 knots decreasing to 10 to
15 knots by midnight...then becoming southwest 5 to 10 knots
after midnight. a chance of showers after midnight. waves 3 to
5 feet. 
.wednesday...southwest winds 5 to 10 knots becoming light and
variable. a chance of showers in the morning. rain showers likely
late in the morning. a chance of showers late in the afternoon.
waves 2 feet or less. 
.thursday...light and variable winds. a chance of showers early
in the morning. waves 2 feet or less. 
.friday...light and variable winds becoming south 5 to 10 knots .
waves 2 feet or less. 


$$

fzus63 kdtx 031344
glflh 
expires:202608032145;;554867

open lake forecast for lake huron
national weather service detroit/pontiac mi
944 am edt mon aug 3 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, 30.00 inches, will build into the
region from the west today offering dry weather and weaker winds
through mid-week. a slow moving frontal boundary will drift in
from the west for the latter half of the week leading to future
opportunities for showers and thunderstorms.


lhz361-032145-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
944 am edt mon aug 3 2026

.rest of today...light and variable winds becoming west 5 to
10 knots late in the afternoon. waves 2 feet or less. 
.tonight...west winds 5 to 10 knots early in the evening becoming
light and variable...then becoming southwest 5 to 10 knots after
midnight backing to the south. waves 2 feet or less. 
.tuesday...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. 
.tuesday night...north winds 5 to 10 knots early in the evening
becoming light and variable...then becoming west 5 to 10 knots
after midnight. a chance of showers in the evening...then showers
likely after midnight. waves 3 to 5 feet subsiding to 1 to 3 feet
after midnight. 
.wednesday...light and variable winds. showers likely in the
morning. a chance of showers. waves 2 feet or less. 
.thursday...light and variable winds becoming south 5 to 10 knots
by midnight. a chance of showers early in the morning. waves
2 feet or less. 
.friday...southwest winds 5 to 10 knots backing to the south .
waves 2 feet or less. 


$$

fzus63 kdtx 031344
glflh 
expires:202608032145;;554869

open lake forecast for lake huron
national weather service detroit/pontiac mi
944 am edt mon aug 3 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, 30.00 inches, will build into the
region from the west today offering dry weather and weaker winds
through mid-week. a slow moving frontal boundary will drift in
from the west for the latter half of the week leading to future
opportunities for showers and thunderstorms.


lhz462>464-032145-
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-
944 am edt mon aug 3 2026

.rest of today...north winds 10 to 15 knots decreasing to 5 to
10 knots late in the afternoon. waves 2 to 4 feet. 
.tonight...light and variable winds becoming south 5 to 10 knots
early in the morning. waves 2 feet or less. 
.tuesday...south winds 5 to 10 knots increasing to 10 to 15 knots
early in the afternoon. waves 2 feet or less. 
.tuesday night...south winds 10 to 15 knots decreasing to 5 to
10 knots after midnight. waves 1 to 3 feet. 
.wednesday...south winds 5 to 10 knots backing to the southeast
late in the afternoon...then backing to the northeast late in the
evening. a chance of showers late in the evening. waves 2 feet or
less. 
.thursday...east winds 5 to 10 knots early in the morning veering
to the southeast...then backing to the southeast 5 to 10 knots
early in the evening becoming light and variable. a chance of
showers. a chance of thunderstorms early in the evening. waves
2 feet or less. 
.friday...light and variable winds becoming south 5 to 10 knots
by midnight. a chance of showers early in the morning. waves
2 feet or less. 


$$

fzus63 kmkx 031401
glflm 
expires:202608032130;;555382

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
901 am cdt mon aug 3 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...

30.1 inch high pressure is approaching the open waters this 
morning, resulting in light and variable winds. winds will trend 
southerly tonight into tuesday as the high shifts east and a cold 
front moves into the western great lakes. said front will slowly 
move across lake michigan late tuesday afternoon through 
wednesday, bringing a brief north-northwest wind shift across the 
open waters. periods of showers and storms will accompany the 
slow- moving front, with severe weather appearing unlikely at this
time. winds will trend variable once more wednesday evening 
through thursday, when 1016 mb high pressure is forecast to build 
back into the western great lakes.

a prolonged period of south-southwest winds will become established 
across lake michigan thursday night through sunday as 1020 mb high 
pressure lingers off the mid-atlantic coast and 1002 mb low pressure 
stalls over the hudson bay. shower and storm chances return to the 
forecast saturday night into the beginning of next week. 


lmz080-669-671-673-675-777-779-870-872-874-876-878-032130-
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-
901 am cdt mon aug 3 2026

sheboygan wi to pentwater mi south...

.rest of today...east winds 5 to 10 kt veering to west early this
afternoon, then becoming south late. waves 1 to 3 ft subsiding to
1 to 2 ft. 
.tonight...southeast winds 10 to 15 kt becoming south. waves 1 to
2 ft. 
.tuesday...southwest winds 10 to 15 kt becoming south 15 to
25 kt. areas of dense fog in the morning. waves 1 to 3 ft
building to 3 to 5 ft. 
.tuesday night...south winds 15 to 25 kt becoming southwest 10 to
15 kt overnight. chance of showers. waves 3 to 5 ft subsiding to
2 to 4 ft. 
.wednesday...southwest winds 10 to 15 kt becoming south. showers
likely in the morning, then chance of showers in the afternoon.
waves 1 to 3 ft. 
.wednesday night...east winds 5 to 10 kt veering to south.
showers likely with a chance of thunderstorms. waves 1 to 2 ft.
.thursday...northwest winds 5 to 10 kt becoming north 10 to
15 kt. chance of showers. waves 1 to 2 ft. 
.friday...west winds 10 to 15 kt becoming southwest 10 to 20 kt.
waves 1 to 2 ft.  

$$

fzus63 kmkx 031401
glflm 
expires:202608032130;;555381

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
901 am cdt mon aug 3 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...

30.1 inch high pressure is approaching the open waters this 
morning, resulting in light and variable winds. winds will trend 
southerly tonight into tuesday as the high shifts east and a cold 
front moves into the western great lakes. said front will slowly 
move across lake michigan late tuesday afternoon through 
wednesday, bringing a brief north-northwest wind shift across the 
open waters. periods of showers and storms will accompany the 
slow- moving front, with severe weather appearing unlikely at this
time. winds will trend variable once more wednesday evening 
through thursday, when 1016 mb high pressure is forecast to build 
back into the western great lakes.

a prolonged period of south-southwest winds will become established 
across lake michigan thursday night through sunday as 1020 mb high 
pressure lingers off the mid-atlantic coast and 1002 mb low pressure 
stalls over the hudson bay. shower and storm chances return to the 
forecast saturday night into the beginning of next week. 


lmz261-362-364-366-563-565-567-868-032130-
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-
901 am cdt mon aug 3 2026

sheboygan wi to pentwater mi north...

.rest of today...north winds less than 10 kt becoming northwest
late this morning, then becoming west early this afternoon
becoming southwest late. waves 1 ft or less. 
.tonight...southwest winds 10 to 15 kt increasing to 10 to 20 kt.
areas of dense fog. waves 1 to 2 ft. 
.tuesday...southwest winds 10 to 20 kt becoming south to 30 kt.
waves 4 to 6 ft occasionally to 8 ft. 
.tuesday night...southwest winds to 30 kt becoming west 10 to
15 kt overnight. showers likely. waves 4 to 6 ft occasionally to
8 ft subsiding to 2 to 4 ft. 
.wednesday...northeast winds 10 to 15 kt backing to southwest.
chance of showers in the morning. waves 1 to 3 ft. 
.wednesday night...southeast winds 5 to 10 kt becoming east.
chance of showers. waves 1 ft or less. 
.thursday...east winds 10 to 15 kt veering to southwest 10 to
20 kt. waves 1 to 2 ft. 
.friday...southwest winds 10 to 20 kt. waves 1 to 3 ft.  

$$

fzus63 kmqt 031401
glfls 
expires:202608032000;;555364

open lake forecast for lake superior
national weather service marquette mi
1001 am edt mon aug 3 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...

ridging of 29.9 inches over lake superior this morning continues to 
shift southeast today as 29.7 inch troughing approaches from the 
west. the trough moves over the lake at 29.8 inches tonight into 
tuesday as a 29.4 inch low tracks over hudson bay. 30.0 inch ridging 
returns on wednesday as high pressure builds into the great lakes 
from the northern plains. for the late week and into the weekend, 
lake superior will be between a 30.3 inch bermuda high and a 29.6 
inch low pressure around western hudson bay.




lsz162-032000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 am edt mon aug 3 2026 /901 am cdt mon aug 3 2026/

.rest of today...south winds 5 to 15 knots backing east in the
afternoon. waves calm to 2 feet. 
.tonight...east winds 5 to 15 knots becoming south 15 to 25 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. 
.tuesday...west winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon, then increasing to 15 to 25 knots
late. a slight chance of showers through early afternoon. waves
subsiding to 1 to 3 feet, then building to 2 to 4 feet. 
.tuesday night...west winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.wednesday...southwest winds 5 to 15 knots becoming south 10 to
20 knots by mid afternoon. waves calm to 2 feet. 
.wednesday night...south winds 5 to 15 knots veering southwest
after midnight. waves calm to 2 feet. 
.thursday...southwest winds 10 to 20 knots diminishing to 5 to
15 knots. waves calm to 2 feet. 
.friday...southwest winds 10 to 20 knots diminishing to 5 to
15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 031401
glfls 
expires:202608032000;;555365

open lake forecast for lake superior
national weather service marquette mi
1001 am edt mon aug 3 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...

ridging of 29.9 inches over lake superior this morning continues to 
shift southeast today as 29.7 inch troughing approaches from the 
west. the trough moves over the lake at 29.8 inches tonight into 
tuesday as a 29.4 inch low tracks over hudson bay. 30.0 inch ridging 
returns on wednesday as high pressure builds into the great lakes 
from the northern plains. for the late week and into the weekend, 
lake superior will be between a 30.3 inch bermuda high and a 29.6 
inch low pressure around western hudson bay.




lsz263-032000-
lake superior from saxon harbor wi to upper entrance to portage
canal mi 5nm off shore to the us/canadian border including isle
royale national park-
1001 am edt mon aug 3 2026

.rest of today...south winds 5 to 15 knots backing east late.
waves calm to 2 feet. 
.tonight...southeast winds 10 to 20 knots becoming south 15 to
25 knots after midnight, then veering southwest late. a chance of
showers after midnight. waves building to 3 to 5 feet
occasionally to 7 feet. 
.tuesday...west winds 15 to 25 knots backing southwest late. a
slight chance of showers through early afternoon. waves subsiding
to 2 to 4 feet. 
.tuesday night...west winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.wednesday...southwest winds 10 to 20 knots. waves building to
1 to 3 feet. 
.wednesday night...south winds 10 to 20 knots becoming southwest
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.thursday...southwest winds 15 to 25 knots diminishing to 10 to
20 knots. waves building to 1 to 3 feet, then subsiding to calm
to 2 feet. 
.friday...southwest winds 10 to 20 knots. waves building to 1 to
3 feet, then subsiding to calm to 2 feet. 

$$

fzus63 kmqt 031401
glfls 
expires:202608032000;;555366

open lake forecast for lake superior
national weather service marquette mi
1001 am edt mon aug 3 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...

ridging of 29.9 inches over lake superior this morning continues to 
shift southeast today as 29.7 inch troughing approaches from the 
west. the trough moves over the lake at 29.8 inches tonight into 
tuesday as a 29.4 inch low tracks over hudson bay. 30.0 inch ridging 
returns on wednesday as high pressure builds into the great lakes 
from the northern plains. for the late week and into the weekend, 
lake superior will be between a 30.3 inch bermuda high and a 29.6 
inch low pressure around western hudson bay.




lsz264-032000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
1001 am edt mon aug 3 2026

.rest of today...south winds 5 to 15 knots backing southeast in
the afternoon. waves calm to 2 feet. 
.tonight...southeast winds 10 to 20 knots veering south after
midnight, then increasing to 15 to 25 knots late. waves building
to 2 to 4 feet. 
.tuesday...southwest winds 15 to 25 knots. a slight chance of
showers through early afternoon. waves 2 to 4 feet. 
.tuesday night...west winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.wednesday...southwest winds 5 to 15 knots. waves calm to 2 feet.
.wednesday night...south winds 5 to 15 knots. waves calm to
2 feet. 
.thursday...southwest winds 10 to 20 knots diminishing to 5 to
15 knots. waves building to 1 to 3 feet, then subsiding to calm
to 2 feet. 
.friday...southwest winds 10 to 20 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 031401
glfls 
expires:202608032000;;555367

open lake forecast for lake superior
national weather service marquette mi
1001 am edt mon aug 3 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...

ridging of 29.9 inches over lake superior this morning continues to 
shift southeast today as 29.7 inch troughing approaches from the 
west. the trough moves over the lake at 29.8 inches tonight into 
tuesday as a 29.4 inch low tracks over hudson bay. 30.0 inch ridging 
returns on wednesday as high pressure builds into the great lakes 
from the northern plains. for the late week and into the weekend, 
lake superior will be between a 30.3 inch bermuda high and a 29.6 
inch low pressure around western hudson bay.




lsz265-032000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
1001 am edt mon aug 3 2026

.rest of today...south winds 5 to 15 knots becoming southeast
10 to 20 knots in the afternoon, then increasing to 15 to
25 knots late. waves calm to 2 feet. 
.tonight...southeast winds 15 to 25 knots veering south after
midnight. waves building to 2 to 4 feet, then subsiding to 1 to
3 feet. 
.tuesday...south winds 15 to 25 knots veering west in the
afternoon, then diminishing to 10 to 20 knots late. a slight
chance of showers. waves subsiding to calm to 2 feet. 
.tuesday night...west winds 10 to 20 knots. waves calm to 2 feet.
.wednesday...west winds 10 to 20 knots becoming south 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.wednesday night...south winds 10 to 20 knots. waves calm to
2 feet. 
.thursday...south winds 10 to 20 knots veering southwest. waves
calm to 2 feet. 
.friday...southwest winds 10 to 20 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 031401
glfls 
expires:202608032000;;555368

open lake forecast for lake superior
national weather service marquette mi
1001 am edt mon aug 3 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...

ridging of 29.9 inches over lake superior this morning continues to 
shift southeast today as 29.7 inch troughing approaches from the 
west. the trough moves over the lake at 29.8 inches tonight into 
tuesday as a 29.4 inch low tracks over hudson bay. 30.0 inch ridging 
returns on wednesday as high pressure builds into the great lakes 
from the northern plains. for the late week and into the weekend, 
lake superior will be between a 30.3 inch bermuda high and a 29.6 
inch low pressure around western hudson bay.




lsz266-032000-
lake superior east of a line from manitou island to marquette mi
and west of a line from grand marais mi to the us/canadian border
beyond 5nm from shore-
1001 am edt mon aug 3 2026

.rest of today...south winds 5 to 15 knots backing southeast in
the afternoon, then increasing to 10 to 20 knots late. waves calm
to 2 feet. 
.tonight...southeast winds 15 to 25 knots veering south after
midnight, then increasing to 20 to 30 knots late. waves building
to 2 to 4 feet. 
.tuesday...south winds 20 to 30 knots becoming southwest 15 to
25 knots in the afternoon, then becoming west 10 to 20 knots
late. a chance of showers. a slight chance of thunderstorms by
mid afternoon. waves building to 3 to 5 feet occasionally to
7 feet, then subsiding to 2 to 4 feet. 
.tuesday night...west winds 5 to 15 knots. a slight chance of
showers. waves subsiding to calm to 2 feet. 
.wednesday...west winds 5 to 15 knots backing southwest by mid
afternoon. waves calm to 2 feet. 
.wednesday night...south winds 5 to 15 knots increasing to 10 to
20 knots after midnight. waves calm to 2 feet. 
.thursday...south winds 5 to 15 knots increasing to 10 to
20 knots. waves building to 1 to 3 feet. 
.friday...southwest winds 5 to 15 knots increasing to 10 to
20 knots. waves subsiding to calm to 2 feet. 

$$

fzus63 kmqt 031401
glfls 
expires:202608032000;;555369

open lake forecast for lake superior
national weather service marquette mi
1001 am edt mon aug 3 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...

ridging of 29.9 inches over lake superior this morning continues to 
shift southeast today as 29.7 inch troughing approaches from the 
west. the trough moves over the lake at 29.8 inches tonight into 
tuesday as a 29.4 inch low tracks over hudson bay. 30.0 inch ridging 
returns on wednesday as high pressure builds into the great lakes 
from the northern plains. for the late week and into the weekend, 
lake superior will be between a 30.3 inch bermuda high and a 29.6 
inch low pressure around western hudson bay.




lsz267-032000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
1001 am edt mon aug 3 2026

.rest of today...west winds less than 10 knots becoming east 5 to
15 knots late. waves calm to 2 feet. 
.tonight...southeast winds 5 to 15 knots becoming south 10 to
20 knots after midnight, then increasing to 15 to 25 knots late.
waves building to 2 to 4 feet. 
.tuesday...south winds 15 to 25 knots veering southwest in the
afternoon, then becoming west 5 to 15 knots late. a chance of
showers and a slight chance of thunderstorms by mid afternoon.
waves subsiding to calm to 2 feet. 
.tuesday night...southwest winds 5 to 15 knots veering west after
midnight. a slight chance of showers. waves calm to 2 feet. 
.wednesday...west winds 5 to 15 knots. waves calm to 2 feet. 
.wednesday night...southeast winds 5 to 15 knots veering south
after midnight. waves calm to 2 feet. 
.thursday...south winds 5 to 15 knots increasing to 10 to
20 knots. waves building to 1 to 3 feet. 
.friday...southwest winds 5 to 15 knots backing south. waves
subsiding to calm to 2 feet. 

$$