fzus61 kbuf 052003
glflo 
expires:202608060300;;676405

open lake forecast for lake ontario
national weather service buffalo ny
403 pm edt wed aug 5 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 high pressure ridge averaging 30.0 inches will drift 
away from the region. a trough and cold front will then ever so 
slowly approach lake ontario from the northwest through this weekend.


loz062-060300-
lake ontario open waters from the niagara river to hamlin beach-
403 pm edt wed aug 5 2026

.tonight...east winds 10 knots or less becoming south. waves
1 foot or less. 
.thursday...southwest winds 10 knots or less becoming west. waves
1 foot or less. 
.thursday night...southwest winds 5 to 10 knots becoming light
and variable. waves 1 foot or less. 
.friday...light and variable winds. a chance of showers in the
morning, then showers likely with a chance of thunderstorms in
the afternoon. waves 1 foot or less. 
.friday night...southeast winds 5 to 10 knots becoming southwest.
showers likely with a chance of thunderstorms in the evening,
then a chance of showers overnight. waves 1 foot or less. 
.saturday...southwest winds 5 to 15 knots becoming west. a chance
of showers and thunderstorms. waves 1 to 2 feet. 
.sunday...west winds 5 to 15 knots becoming southwest. a chance
of showers sunday night. waves 1 to 2 feet. 
.monday...west winds 5 to 10 knots. a chance of showers during
the day, then showers likely monday night. waves around 1 foot. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 052003
glflo 
expires:202608060300;;676406

open lake forecast for lake ontario
national weather service buffalo ny
403 pm edt wed aug 5 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 high pressure ridge averaging 30.0 inches will drift 
away from the region. a trough and cold front will then ever so 
slowly approach lake ontario from the northwest through this weekend.


loz063>065-060300-
lake ontario open waters from hamlin beach to the saint lawrence
river-
403 pm edt wed aug 5 2026

.tonight...northeast winds 5 to 10 knots becoming south. a chance
of showers late. waves 1 foot or less. 
.thursday...south winds 5 to 15 knots becoming west. a chance of
showers early. waves 2 feet or less. 
.thursday night...south winds 10 knots or less becoming
southwest. waves 1 foot or less. 
.friday...southwest winds 10 knots or less becoming south.
showers likely with a chance of thunderstorms in the afternoon.
waves 1 foot or less. 
.friday night...south winds 10 knots or less becoming southwest.
showers likely with a chance of thunderstorms in the evening,
then showers likely overnight. waves 1 foot or less. 
.saturday...southwest winds 10 to 15 knots becoming west. showers
likely with a chance of thunderstorms during the day, then a
chance of showers and thunderstorms saturday night. waves 2 feet
or less. 
.sunday...west winds 5 to 15 knots becoming southwest. a chance
of showers sunday night. waves 1 to 3 feet. 
.monday...west winds 5 to 10 knots. a chance of showers 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.

$$

fzus61 kcle 051956
glfle 
expires:202608060230;;676055

open lake forecast for lake erie
national weather service cleveland oh
356 pm edt wed aug 5 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 of 30.00 inches will drift east tonight as a cold 
front approaches from the northwest. this front will slow just to
the west of lake erie thursday before stalling in the vicinity of
the lake on friday. a secondary trough will finally push the 
front across the lake on saturday. a ridge of 30.00 inches will 
build into the southern great lakes on sunday with another front 
settling north of the lake.


lez165>167-060230-
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-
356 pm edt wed aug 5 2026

.tonight...east winds 10 knots or less becoming southwest. waves
1 foot or less. 
.thursday...southwest winds 10 knots or less becoming west. a
slight chance of showers and thunderstorms late. waves 1 foot or
less. 
.thursday night...northwest winds 10 knots or less becoming
southwest. a chance of showers overnight. waves 1 foot or less. 
.friday...southwest winds 5 to 10 knots. a chance of showers in
the morning, then showers likely in the afternoon. waves 1 foot
or less. 
.friday night...southwest winds 5 to 15 knots. showers likely
with a chance of thunderstorms. waves 1 to 3 feet. 
.saturday...southwest winds 10 to 15 knots becoming west. a
chance of showers and thunderstorms. waves 2 to 4 feet subsiding
to 1 to 3 feet. 
.sunday...southwest winds 5 to 15 knots. a chance of showers and
thunderstorms sunday night. waves 1 to 3 feet. 
.monday...southwest winds 10 to 15 knots becoming west 15 to
20 knots. a chance of showers and thunderstorms during the day,
then showers likely monday night. waves 1 to 3 feet building to
2 to 4 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 051956
glfle 
expires:202608060230;;676056

open lake forecast for lake erie
national weather service cleveland oh
356 pm edt wed aug 5 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 of 30.00 inches will drift east tonight as a cold 
front approaches from the northwest. this front will slow just to
the west of lake erie thursday before stalling in the vicinity of
the lake on friday. a secondary trough will finally push the 
front across the lake on saturday. a ridge of 30.00 inches will 
build into the southern great lakes on sunday with another front 
settling north of the lake.


lez061-168-169-060230-
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-
356 pm edt wed aug 5 2026

.tonight...light and variable winds becoming south 5 to 10 knots.
a chance of showers and thunderstorms this evening, then a chance
of showers with a slight chance of thunderstorms after midnight.
waves 1 foot or less. 
.thursday...southwest winds 10 knots or less becoming west. a
slight chance of showers and thunderstorms late. waves 1 foot or
less. 
.thursday night...southwest winds 10 knots or less becoming
south. a chance of showers and thunderstorms overnight. waves
1 foot or less. 
.friday...south winds 5 to 10 knots becoming southwest. showers
likely with a chance of thunderstorms. waves 1 foot or less. 
.friday night...southwest winds 10 knots or less increasing to
10 to 15 knots. showers likely with a chance of thunderstorms.
waves 1 to 3 feet. 
.saturday...southwest winds 5 to 15 knots becoming west. a chance
of showers and thunderstorms. waves 2 to 4 feet subsiding to 1 to
2 feet. 
.sunday...southwest winds 5 to 15 knots. showers likely with a
chance of thunderstorms sunday night. waves 1 to 2 feet. 
.monday...southwest winds 10 to 15 knots increasing to 15 to
20 knots. a chance of showers and thunderstorms during the day,
then showers likely monday night. waves 1 to 3 feet building to
2 to 4 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 051956
glfle 
expires:202608060230;;676054

open lake forecast for lake erie
national weather service cleveland oh
356 pm edt wed aug 5 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 of 30.00 inches will drift east tonight as a cold 
front approaches from the northwest. this front will slow just to
the west of lake erie thursday before stalling in the vicinity of
the lake on friday. a secondary trough will finally push the 
front across the lake on saturday. a ridge of 30.00 inches will 
build into the southern great lakes on sunday with another front 
settling north of the lake.


lez162>164-060230-
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-
the islands to vermilion oh beyond 5 nm off shoreline to us-
canadian border-
356 pm edt wed aug 5 2026

.tonight...southeast winds 10 knots or less becoming southwest.
waves 1 foot or less. 
.thursday...southwest winds 10 knots or less becoming southeast.
a slight chance of showers. a slight chance of showers and
thunderstorms late. waves 1 foot or less. 
.thursday night...south winds 10 knots or less becoming
southwest. a chance of showers and thunderstorms in the evening,
then a chance of showers overnight. waves 1 foot or less. 
.friday...southwest winds 5 to 10 knots becoming south. a chance
of showers in the morning, then a chance of showers and
thunderstorms in the afternoon. waves 1 foot or less. 
.friday night...south winds 5 to 15 knots becoming southwest. a
chance of showers and thunderstorms in the evening, then a chance
of showers overnight. waves 2 feet or less. 
.saturday...southwest winds 5 to 15 knots becoming west. a chance
of showers during the day. waves 1 to 2 feet. 
.sunday...southwest winds 5 to 15 knots. a chance of showers and
thunderstorms sunday night. waves 2 feet or less. 
.monday...southwest winds 10 to 15 knots becoming west 15 to
20 knots. a chance of showers and thunderstorms during the day,
then showers likely monday night. waves 1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 051950
glfsc 
expires:202608060400;;675986

lake st clair forecast
national weather service detroit/pontiac mi
350 pm edt wed aug 5 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...a cold front, 30.00 inches, will slowly move across
lake huron this evening and into lake erie by tomorrow morning.
this front will produce showers and a low chance for
thunderstorms. the front will diminish across the eastern great
lakes thursday, leaving light winds across the region friday.


lcz460-060400-
lake st clair-
350 pm edt wed aug 5 2026

.tonight...south winds 5 to 10 knots veering to the west early in
the morning. mostly clear. waves 2 feet or less.
.thursday...west winds 5 to 10 knots early in the morning becoming
light and variable...then becoming south 5 to 10 knots in the
afternoon. partly sunny. a chance of light showers in the late
morning and afternoon. a chance of thunderstorms early in the
afternoon. waves 2 feet or less.
.thursday night...south winds 5 to 10 knots becoming light and
variable. partly cloudy early in the evening becoming mostly cloudy.
a chance of showers and thunderstorms early in the evening. a chance
of light showers after midnight. waves 2 feet or less.
.friday...light and variable winds becoming south 5 to 10 knots in
the late morning and afternoon. partly sunny. a chance of light
showers early in the afternoon. waves 2 feet or less.
.friday night...southwest winds 5 to 10 knots. partly cloudy. a
chance of light showers. a chance of thunderstorms by midnight.
waves 2 feet or less.
.saturday...southwest winds 5 to 10 knots increasing to 10 to 15
knots in the afternoon...then becoming west 5 to 10 knots in the
evening. partly sunny with a chance of light showers in the
morning...then mostly clear with a chance of showers and
thunderstorms in the afternoon and evening. waves 2 feet or less.
.sunday...southwest winds 10 to 15 knots. mostly clear. 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 051950
glflh 
expires:202608060400;;675931

open lake forecast for lake huron
national weather service detroit/pontiac mi
350 pm edt wed aug 5 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...a cold front, 30.00 inches, will slowly move across
lake huron this evening and into lake erie by tomorrow morning.
this front will produce showers and a low chance for
thunderstorms. the front will diminish across the eastern great
lakes thursday, leaving light winds across the region friday.


lhz361-060400-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
350 pm edt wed aug 5 2026

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


$$

fzus63 kdtx 051950
glflh 
expires:202608060400;;675932

open lake forecast for lake huron
national weather service detroit/pontiac mi
350 pm edt wed aug 5 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...a cold front, 30.00 inches, will slowly move across
lake huron this evening and into lake erie by tomorrow morning.
this front will produce showers and a low chance for
thunderstorms. the front will diminish across the eastern great
lakes thursday, leaving light winds across the region friday.


lhz362-363-060400-
lake huron from presque isle light to sturgeon point mi beyond
5nm off shore-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
350 pm edt wed aug 5 2026

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


$$

fzus63 kdtx 051950
glflh 
expires:202608060400;;675933

open lake forecast for lake huron
national weather service detroit/pontiac mi
350 pm edt wed aug 5 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...a cold front, 30.00 inches, will slowly move across
lake huron this evening and into lake erie by tomorrow morning.
this front will produce showers and a low chance for
thunderstorms. the front will diminish across the eastern great
lakes thursday, leaving light winds across the region friday.


lhz462>464-060400-
lake huron from port austin to harbor beach beyond 5nm off shore-
lake huron from harbor beach to port sanilac beyond 5nm off shore-
lake huron from port sanilac to port huron beyond 5nm off shore-
350 pm edt wed aug 5 2026

.tonight...south winds 5 to 10 knots veering to the southwest
early in the morning. a chance of showers and thunderstorms in
the evening...then a chance of showers after midnight. waves
2 feet or less. 
.thursday...west winds 5 to 10 knots early in the morning
becoming light and variable...then becoming northeast 5 to
10 knots late in the afternoon. showers likely in the morning...
then a chance of showers in the afternoon. waves 2 feet or less. 
.thursday night...light and variable winds. waves 2 feet or less.
.friday...light and variable winds. a chance of showers in the
afternoon. waves 2 feet or less. 
.friday night...south winds 5 to 10 knots. waves 2 feet or less. 
.saturday...southwest winds 5 to 10 knots veering to the west
late in the afternoon...then veering to the northeast late in the
evening. a chance of showers. waves 2 feet or less. 
.sunday...southwest 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 . a chance of showers. a chance of
thunderstorms until early evening. waves 1 to 3 feet. 
.monday...west winds 5 to 10 knots veering to the north until
early evening...then veering to the south by midnight. a chance
of showers. waves 2 feet or less. 


$$

fzus63 kmkx 052010
glflm 
expires:202608060315;;677280

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
310 pm cdt wed aug 5 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...

a stalled front is sitting over southern lake michigan this 
morning. light and variable winds can be expected through thursday
as the front shifts south and weakens and high pressure moves 
into the region. intermittent showers with a few thunderstorms 
are possible.

patchy marine fog is possible due to warm and moist air over the
region. the areal coverage of the fog is not able to discern due
to the high clouds over the lake. surface observations near the
lake are showing fog with visibility greater than one mile this
afternoon, and a ship ob over the center of the lake indicated
haze. so not thinking marine dense fog advisory at this time but
will continue to monitor trends through the night.

a prolonged period of south-southwest winds will then become 
established across lake michigan late thursday night through 
sunday, with the exception of northwest winds saturday morning 
with a brief cold frontal passage.


lmz080-669-671-673-675-777-779-870-872-874-876-878-060315-
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-
310 pm cdt wed aug 5 2026

sheboygan wi to pentwater mi south...

.tonight...southwest winds 10 to 15 kt becoming south 5 to 10 kt
late this evening, then becoming southwest after midnight
becoming southeast late. chance of showers and slight chance of
thunderstorms this evening, then chance of showers overnight.
patchy fog overnight. waves 1 to 2 ft. 
.thursday...southeast winds 5 to 10 kt backing to north. patchy
fog in the morning. slight chance of showers in the morning.
waves 1 to 2 ft. 
.thursday night...northeast winds 5 to 10 kt veering to
southwest. waves 1 ft or less. 
.friday...south winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 ft or less building to 1 to 3 ft. 
.friday night...south winds 10 to 20 kt becoming southwest.
chance of showers overnight. waves 1 to 3 ft. 
.saturday...west winds 10 to 20 kt becoming southwest 10 to
15 kt. waves 1 to 3 ft. 
.saturday night...south winds 10 to 15 kt becoming southwest.
waves 1 to 3 ft. 
.sunday...southwest winds 10 to 20 kt becoming south. waves 1 to
3 ft. 
.monday...southwest winds 10 to 20 kt. showers likely with a
chance of thunderstorms. waves 1 to 3 ft.  

$$

fzus63 kmkx 052010
glflm 
expires:202608060315;;677279

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
310 pm cdt wed aug 5 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...

a stalled front is sitting over southern lake michigan this 
morning. light and variable winds can be expected through thursday
as the front shifts south and weakens and high pressure moves 
into the region. intermittent showers with a few thunderstorms 
are possible.

patchy marine fog is possible due to warm and moist air over the
region. the areal coverage of the fog is not able to discern due
to the high clouds over the lake. surface observations near the
lake are showing fog with visibility greater than one mile this
afternoon, and a ship ob over the center of the lake indicated
haze. so not thinking marine dense fog advisory at this time but
will continue to monitor trends through the night.

a prolonged period of south-southwest winds will then become 
established across lake michigan late thursday night through 
sunday, with the exception of northwest winds saturday morning 
with a brief cold frontal passage.


lmz261-362-364-366-563-565-567-868-060315-
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-
310 pm cdt wed aug 5 2026

sheboygan wi to pentwater mi north...

.tonight...south winds 5 to 10 kt backing to east. slight chance
of showers this evening. patchy fog overnight. waves 1 ft or
less. 
.thursday...southeast winds 5 to 10 kt veering to southwest.
patchy fog in the morning. waves 1 ft or less. 
.thursday night...south winds 10 to 15 kt. waves 1 to 2 ft. 
.friday...south winds 10 to 20 kt. waves 1 to 3 ft. 
.friday night...south winds 15 to 25 kt becoming southwest 10 to
20 kt. chance of showers. waves 2 to 4 ft. 
.saturday...northwest winds 10 to 20 kt becoming southwest. waves
1 to 3 ft. 
.saturday night...south winds 10 to 20 kt becoming southwest
10 to 15 kt. waves 1 to 3 ft. 
.sunday...southwest winds 10 to 20 kt. waves 1 to 3 ft. 
.monday...south winds 10 to 15 kt becoming southwest 10 to 20 kt.
chance of showers. waves 1 to 3 ft.  

$$

fzus63 kmqt 052001
glfls 
expires:202608060800;;676286

open lake forecast for lake superior
national weather service marquette mi
401 pm edt wed aug 5 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...

high pressure over the plains is extending 30.0 inch ridging over 
the lake this afternoon, which remains through thursday. for friday 
and into the weekend, pressure over lake superior will remain around 
29.9 inches between a 30.3 inch bermuda high and 29.5 inch low 
pressure near the western shores of hudson bay. on monday, pressure 
over lake superior rises slightly to 30.0 inches as the hudson bay 
low shifts east and ridging builds in from the western provinces of 
canada.




lsz162-060800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt wed aug 5 2026 /301 pm cdt wed aug 5 2026/

.late this afternoon...south winds 10 to 20 knots. waves calm to
2 feet. 
.tonight...south winds 5 to 15 knots veering southwest late.
waves calm to 2 feet. 
.thursday...southwest winds 15 to 25 knots backing south late.
waves building to 2 to 4 feet, then subsiding to 1 to 3 feet. 
.thursday night...southwest winds 15 to 25 knots. a chance of
showers and a slight chance of thunderstorms after midnight.
waves building to 2 to 4 feet. 
.friday...southwest winds 10 to 20 knots. a chance of showers and
a slight chance of thunderstorms. waves subsiding to calm to
2 feet. 
.friday night...northwest winds 10 to 20 knots backing west after
midnight. waves calm to 2 feet. 
.saturday...west winds 10 to 20 knots backing southwest by mid
afternoon. waves building to 1 to 3 feet, then subsiding to calm
to 2 feet. 
.saturday night...west winds 5 to 15 knots. waves calm to 2 feet.
.sunday...southwest winds 5 to 15 knots veering northwest. waves
calm to 2 feet. 
.monday...west winds 5 to 15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 052001
glfls 
expires:202608060800;;676287

open lake forecast for lake superior
national weather service marquette mi
401 pm edt wed aug 5 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...

high pressure over the plains is extending 30.0 inch ridging over 
the lake this afternoon, which remains through thursday. for friday 
and into the weekend, pressure over lake superior will remain around 
29.9 inches between a 30.3 inch bermuda high and 29.5 inch low 
pressure near the western shores of hudson bay. on monday, pressure 
over lake superior rises slightly to 30.0 inches as the hudson bay 
low shifts east and ridging builds in from the western provinces of 
canada.




lsz263-060800-
lake superior from saxon harbor wi to upper entrance to portage
canal mi 5nm off shore to the us/canadian border including isle
royale national park-
401 pm edt wed aug 5 2026

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

$$

fzus63 kmqt 052001
glfls 
expires:202608060800;;676288

open lake forecast for lake superior
national weather service marquette mi
401 pm edt wed aug 5 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...

high pressure over the plains is extending 30.0 inch ridging over 
the lake this afternoon, which remains through thursday. for friday 
and into the weekend, pressure over lake superior will remain around 
29.9 inches between a 30.3 inch bermuda high and 29.5 inch low 
pressure near the western shores of hudson bay. on monday, pressure 
over lake superior rises slightly to 30.0 inches as the hudson bay 
low shifts east and ridging builds in from the western provinces of 
canada.




lsz264-060800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
401 pm edt wed aug 5 2026

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

$$

fzus63 kmqt 052001
glfls 
expires:202608060800;;676289

open lake forecast for lake superior
national weather service marquette mi
401 pm edt wed aug 5 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...

high pressure over the plains is extending 30.0 inch ridging over 
the lake this afternoon, which remains through thursday. for friday 
and into the weekend, pressure over lake superior will remain around 
29.9 inches between a 30.3 inch bermuda high and 29.5 inch low 
pressure near the western shores of hudson bay. on monday, pressure 
over lake superior rises slightly to 30.0 inches as the hudson bay 
low shifts east and ridging builds in from the western provinces of 
canada.




lsz265-060800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
401 pm edt wed aug 5 2026

.late this afternoon...east winds 5 to 15 knots. waves calm to
2 feet. 
.tonight...southeast winds 10 to 20 knots veering south after
midnight. waves calm to 2 feet. 
.thursday...southwest winds 10 to 20 knots backing southeast
late. waves calm to 2 feet. 
.thursday night...south winds 15 to 25 knots. waves building to
2 to 4 feet, then subsiding to 1 to 3 feet. 
.friday...south winds 10 to 20 knots. showers likely and a chance
of thunderstorms by mid afternoon. waves subsiding to calm to
2 feet. 
.friday night...west winds 10 to 20 knots increasing to 15 to
25 knots after midnight. showers likely and a chance of
thunderstorms through midnight. waves calm to 2 feet. 
.saturday...west winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. waves calm to 2 feet. 
.saturday night...southwest winds 10 to 20 knots veering west
after midnight. waves calm to 2 feet. 
.sunday...northwest winds 10 to 20 knots backing west. waves calm
to 2 feet. 
.monday...west winds 10 to 20 knots diminishing to 5 to 15 knots.
waves calm to 2 feet. 

$$

fzus63 kmqt 052001
glfls 
expires:202608060800;;676290

open lake forecast for lake superior
national weather service marquette mi
401 pm edt wed aug 5 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...

high pressure over the plains is extending 30.0 inch ridging over 
the lake this afternoon, which remains through thursday. for friday 
and into the weekend, pressure over lake superior will remain around 
29.9 inches between a 30.3 inch bermuda high and 29.5 inch low 
pressure near the western shores of hudson bay. on monday, pressure 
over lake superior rises slightly to 30.0 inches as the hudson bay 
low shifts east and ridging builds in from the western provinces of 
canada.




lsz266-060800-
lake superior east of a line from manitou island to marquette mi
and west of a line from grand marais mi to the us/canadian border
beyond 5nm from shore-
401 pm edt wed aug 5 2026

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

$$

fzus63 kmqt 052001
glfls 
expires:202608060800;;676291

open lake forecast for lake superior
national weather service marquette mi
401 pm edt wed aug 5 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...

high pressure over the plains is extending 30.0 inch ridging over 
the lake this afternoon, which remains through thursday. for friday 
and into the weekend, pressure over lake superior will remain around 
29.9 inches between a 30.3 inch bermuda high and 29.5 inch low 
pressure near the western shores of hudson bay. on monday, pressure 
over lake superior rises slightly to 30.0 inches as the hudson bay 
low shifts east and ridging builds in from the western provinces of 
canada.




lsz267-060800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
401 pm edt wed aug 5 2026

.late this afternoon...northwest winds 5 to 15 knots. waves calm
to 2 feet. 
.tonight...northwest winds 5 to 15 knots backing south after
midnight. waves calm to 2 feet. 
.thursday...south winds 5 to 15 knots backing southeast late.
waves calm to 2 feet. 
.thursday night...south winds 10 to 20 knots increasing to 15 to
25 knots after midnight. waves building to 2 to 4 feet. 
.friday...south winds 10 to 20 knots. a slight chance of showers
by mid afternoon. waves subsiding to calm to 2 feet. 
.friday night...southwest winds 10 to 20 knots veering west after
midnight. showers through midnight. a chance of thunderstorms. a
chance of showers after midnight. waves calm to 2 feet. 
.saturday...west winds 10 to 20 knots diminishing to 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.saturday night...south winds 5 to 15 knots becoming southwest
10 to 20 knots after midnight. waves calm to 2 feet. 
.sunday...west winds 5 to 15 knots. waves calm to 2 feet. 
.monday...west winds 5 to 15 knots veering northwest. waves calm
to 2 feet. 

$$