fzus61 kbuf 082003
glflo 
expires:202608090300;;843796

open lake forecast for lake ontario
national weather service buffalo ny
403 pm edt sat aug 8 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 exits 
eastward before a cold front sweeps eastward across lake ontario 
tonight. behind the front, a ridge averaging 30.1 inches builds from 
the western great lakes through sunday. this ridge begins to exit 
eastward sunday night and another cold front should sweep eastward 
across lake ontario monday night. behind the front, a trough 
averaging 29.8 inches should linger over the eastern great lakes 
through this thursday.


loz063>065-090300-
lake ontario open waters from hamlin beach to the saint lawrence
river-
403 pm edt sat aug 8 2026

.tonight...south winds 10 to 15 knots becoming west 15 to
20 knots. waves 2 feet or less. 
.sunday...west winds 10 to 15 knots. waves 1 to 3 feet. 
.sunday night...west winds 5 to 15 knots becoming south. waves
2 feet or less. 
.monday...south winds 10 to 15 knots becoming west. showers
likely in the morning, then showers likely with a chance of
thunderstorms in the afternoon. waves 2 feet or less. 
.monday night...west winds 10 to 15 knots. showers likely in the
evening, then a chance of showers overnight. waves 1 to 2 feet. 
.tuesday...west winds 5 to 10 knots becoming northwest. waves
2 feet or less. 
.wednesday...west winds 5 to 10 knots becoming southwest. a
chance of showers wednesday night. waves 1 foot or less. 
.thursday...west winds 5 to 15 knots becoming northwest. a chance
of showers. waves 1 to 2 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 082003
glflo 
expires:202608090300;;843795

open lake forecast for lake ontario
national weather service buffalo ny
403 pm edt sat aug 8 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 exits 
eastward before a cold front sweeps eastward across lake ontario 
tonight. behind the front, a ridge averaging 30.1 inches builds from 
the western great lakes through sunday. this ridge begins to exit 
eastward sunday night and another cold front should sweep eastward 
across lake ontario monday night. behind the front, a trough 
averaging 29.8 inches should linger over the eastern great lakes 
through this thursday.


loz062-090300-
lake ontario open waters from the niagara river to hamlin beach-
403 pm edt sat aug 8 2026

.tonight...southwest winds 15 to 25 knots becoming northwest. a
chance of showers and thunderstorms early. waves 2 feet or less. 
.sunday...northwest winds 15 to 20 knots becoming southwest and
diminishing to 5 to 10 knots. waves 2 feet or less. 
.sunday night...south winds 5 to 10 knots. waves 1 foot or less. 
.monday...southwest winds 5 to 15 knots becoming west. showers
likely. waves 2 feet or less. 
.monday night...west winds 5 to 15 knots. a chance of showers.
waves 1 to 2 feet. 
.tuesday...west winds 10 knots or less becoming northwest. a
chance of showers and thunderstorms. waves 1 foot or less. 
.wednesday...northwest winds 10 knots or less becoming west. a
chance of showers wednesday night. waves 1 foot or less. 
.thursday...west winds 5 to 15 knots becoming northwest. a chance
of showers during the day. waves 1 to 2 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 081948
glfle 
expires:202608090215;;843188

open lake forecast for lake erie
national weather service cleveland oh
348 pm edt sat aug 8 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...
a cold front will with pressure of 29.90 inches will cross lake
erie this evening. a ridge averaging 30.00 inches will build over
the region for sunday. a series of weak low pressure systems 
29.90 inches will move through the region sunday night through 
tuesday. high pressure 30.00 inches will build into the region for
wednesday.


lez061-168-169-090215-
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-
348 pm edt sat aug 8 2026

.tonight...southwest winds 5 to 15 knots becoming north. a slight
chance of showers and thunderstorms early, then a chance of
showers with a slight chance of thunderstorms late this evening.
a slight chance of showers and thunderstorms after midnight.
waves 1 to 3 feet. 
.sunday...north winds less than 10 knots. waves 2 feet or less. 
.sunday night...light and variable winds becoming southwest 10 to
15 knots. a chance of showers and thunderstorms overnight. waves
1 foot or less building to 1 to 3 feet. 
.monday...southwest winds 15 to 20 knots becoming west 10 to
15 knots. showers likely with a chance of thunderstorms in the
morning, then a chance of showers and thunderstorms in the
afternoon. waves 2 to 4 feet building to 3 to 5 feet. 
.monday night...west winds 5 to 15 knots. showers likely with a
chance of thunderstorms. waves 2 to 4 feet subsiding to 1 to
2 feet. 
.tuesday...west winds 10 knots or less becoming northwest. a
chance of showers and thunderstorms during the day, then a chance
of showers tuesday night. waves 1 to 2 feet. 
.wednesday...north winds 10 knots or less becoming southwest. a
chance of showers wednesday night. waves 1 foot or less. 
.thursday...southwest winds 5 to 10 knots becoming north. a
chance of showers during the day. waves 1 to 2 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 081948
glfle 
expires:202608090215;;843186

open lake forecast for lake erie
national weather service cleveland oh
348 pm edt sat aug 8 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...
a cold front will with pressure of 29.90 inches will cross lake
erie this evening. a ridge averaging 30.00 inches will build over
the region for sunday. a series of weak low pressure systems 
29.90 inches will move through the region sunday night through 
tuesday. high pressure 30.00 inches will build into the region for
wednesday.


lez162>164-090215-
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-
348 pm edt sat aug 8 2026

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

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 081948
glfle 
expires:202608090215;;843187

open lake forecast for lake erie
national weather service cleveland oh
348 pm edt sat aug 8 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...
a cold front will with pressure of 29.90 inches will cross lake
erie this evening. a ridge averaging 30.00 inches will build over
the region for sunday. a series of weak low pressure systems 
29.90 inches will move through the region sunday night through 
tuesday. high pressure 30.00 inches will build into the region for
wednesday.


lez165>167-090215-
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-
348 pm edt sat aug 8 2026

.tonight...southwest winds 5 to 15 knots becoming north. a slight
chance of showers and thunderstorms early. waves 1 to 3 feet. 
.sunday...north winds 10 knots or less becoming west. waves
2 feet or less. 
.sunday night...south winds 5 to 15 knots becoming southwest
15 to 20 knots. a chance of showers and thunderstorms. waves 1 to
3 feet. 
.monday...southwest winds 15 to 20 knots becoming west 10 to
15 knots. showers likely with a chance of thunderstorms in the
morning, then a chance of showers and thunderstorms in the
afternoon. waves 3 to 5 feet subsiding to 2 to 4 feet. 
.monday night...southwest winds around 10 knots. showers likely
with a chance of thunderstorms. waves 1 to 3 feet. 
.tuesday...southwest winds 5 to 15 knots becoming west. a chance
of showers and thunderstorms. waves 1 to 2 feet. 
.wednesday...northwest winds 5 to 10 knots becoming southwest. a
chance of showers. waves 1 foot or less. 
.thursday...west winds around 10 knots becoming north. waves 1 to
2 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 082000
glfsc 
expires:202608090400;;843488

lake st clair forecast
national weather service detroit/pontiac mi
400 pm edt sat aug 8 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 around 30.00 inches slides east through
the ohio valley tonight through sunday, allowing winds to become
southerly once again for sunday. sunday evening through early
next week an active pattern will bring back chances for organized
thunderstorms to the region.


lcz460-090400-
lake st clair-
400 pm edt sat aug 8 2026

.tonight...northwest winds 10 to 15 knots veering to the north after
midnight...then diminishing to 5 to 10 knots early in the morning.
mostly clear. waves 2 feet or less.
.sunday...light and variable winds becoming south 5 to 10 knots
early in the afternoon...then increasing to 10 to 15 knots late in
the afternoon. sunny until late afternoon becoming partly sunny.
waves 2 feet or less.
.sunday night...southwest winds 10 to 15 knots. showers likely in
the evening. a chance of thunderstorms. showers after midnight.
waves 2 feet or less.
.monday...southwest winds 10 to 15 knots becoming west 5 to 10 knots
early in the afternoon. partly sunny. a chance of light showers
until late afternoon...then a chance of showers and thunderstorms
early in the afternoon. waves 2 feet or less.
.monday night...west winds 5 to 10 knots. partly cloudy. light
showers likely and a chance of thunderstorms ...then light showers
likely after midnight. waves 2 feet or less.
.tuesday...southwest winds 5 to 10 knots veering to the north in the
evening. partly sunny becoming mostly cloudy. light showers likely
and a chance of thunderstorms in the morning...then a chance of
showers and thunderstorms in the afternoon and evening. waves 2 feet
or less.
.wednesday...south winds 5 to 10 knots. mostly clear. a chance of
showers and thunderstorms. waves 2 feet or less.
.thursday...north winds 10 to 15 knots. partly cloudy. waves 2 feet
or less.

$$

fzus63 kdtx 081959
glflh 
expires:202608090400;;843462

open lake forecast for lake huron
national weather service detroit/pontiac mi
359 pm edt sat aug 8 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 around 30.00 inches slides east through
the ohio valley tonight through sunday, allowing winds to become
southerly once again for sunday. sunday evening through early
next week an active pattern will bring back chances for organized
thunderstorms to the region.


lhz462>464-090400-
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-
359 pm edt sat aug 8 2026

.tonight...north winds 5 to 10 knots in the evening becoming
light and variable. waves 2 feet or less. 
.sunday...southwest winds 5 to 10 knots becoming south 10 to
15 knots late in the afternoon. waves 2 feet or less. 
.sunday night...south winds 10 to 15 knots becoming southwest
5 to 10 knots after midnight. a chance of showers after midnight.
waves 1 to 3 feet. 
.monday...west winds 5 to 10 knots. a chance of showers in the
morning. waves 2 feet or less. 
.monday night...north winds 5 to 10 knots early in the evening
becoming light and variable. waves 2 feet or less. 
.tuesday...north winds 5 to 10 knots becoming light and variable.
a chance of thunderstorms late in the morning. a chance of
showers. waves 2 feet or less. 
.wednesday...light and variable winds becoming north 5 to
10 knots early in the evening...then veering to the southeast by
midnight. a chance of showers by midnight. waves 2 feet or less. 
.thursday...west winds 5 to 10 knots veering to the northwest
early in the evening...then becoming north 10 to 15 knots by
midnight. waves 2 feet or less building to 2 to 4 feet by
midnight. 


$$

fzus63 kdtx 081959
glflh 
expires:202608090400;;843461

open lake forecast for lake huron
national weather service detroit/pontiac mi
359 pm edt sat aug 8 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 around 30.00 inches slides east through
the ohio valley tonight through sunday, allowing winds to become
southerly once again for sunday. sunday evening through early
next week an active pattern will bring back chances for organized
thunderstorms to the region.


lhz362-363-090400-
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-
359 pm edt sat aug 8 2026

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


$$

fzus63 kdtx 081959
glflh 
expires:202608090400;;843460

open lake forecast for lake huron
national weather service detroit/pontiac mi
359 pm edt sat aug 8 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 around 30.00 inches slides east through
the ohio valley tonight through sunday, allowing winds to become
southerly once again for sunday. sunday evening through early
next week an active pattern will bring back chances for organized
thunderstorms to the region.


lhz361-090400-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
359 pm edt sat aug 8 2026

.tonight...northwest winds 10 to 15 knots decreasing to 5 to
10 knots late in the evening...then backing to the southwest
after midnight. waves 2 feet or less. 
.sunday...southwest winds 5 to 10 knots backing to the south late
in the afternoon. waves 2 feet or less. 
.sunday night...light and variable winds. a chance of showers
after midnight. waves 2 feet or less. 
.monday...northwest winds 5 to 10 knots. waves 2 feet or less. 
.monday night...northwest winds 5 to 10 knots  becoming light and
variable. waves 2 feet or less. 
.tuesday...light and variable winds becoming west 5 to 10 knots
late in the afternoon...then becoming light and variable late in
the evening. waves 2 feet or less. 
.wednesday...light and variable winds becoming west 5 to 10 knots
. a chance of showers by midnight. waves 2 feet or less. 
.thursday...west winds 5 to 10 knots becoming northwest 10 to
15 knots in the late morning and early afternoon...then
increasing to 15 to 20 knots early in the evening decreasing to
10 to 15 knots by midnight. a chance of showers early in the
morning. waves 1 to 3 feet building to 3 to 5 feet . 


$$

fzus63 kmkx 081951
glflm 
expires:202608090315;;843313

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
251 pm cdt sat aug 8 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...

winds will become southerly by this evening as a low pressure
trough around 29.8 inches approaches from the minnesota arrowhead.
an unsettled weather pattern will set up over the upper great 
lakes all week where weak waves of low pressure will cross the 
region and produce rounds of thunderstorms at times. the first
round of weakening storms should arrive in southern lake michigan
late sunday morning, and additional storms are possible there
sunday night.


lmz080-669-671-673-675-777-779-870-872-874-876-878-090315-
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-
251 pm cdt sat aug 8 2026

sheboygan wi to pentwater mi south...

.tonight...south winds 10 to 15 kt. waves 1 to 2 ft. 
.sunday...south winds 10 to 15 kt increasing to 10 to 20 kt.
chance of showers and thunderstorms, mainly in the late morning 
and early afternoon. waves 1 to 3 ft building to 2 to 4 ft. 
.sunday night...south winds 10 to 15 kt becoming southwest 10 to
20 kt. chance of showers and thunderstorms. waves 2 to 4 ft. 
.monday...northwest winds 10 to 15 kt veering to north. chance of
showers in the morning, then chance of showers and thunderstorms
in the afternoon. waves 1 to 3 ft. 
.monday night...northeast winds 5 to 10 kt. chance of showers and
thunderstorms in the evening, then chance of showers overnight.
waves 1 ft or less. 
.tuesday...east winds 5 to 10 kt becoming northeast 10 to 15 kt.
chance of showers and thunderstorms in the morning, then chance
of showers in the afternoon. waves 1 ft or less. 
.tuesday night...northeast winds 5 to 10 kt. chance of showers.
waves 1 ft or less. 
.wednesday...southeast winds 10 to 15 kt becoming south. waves
1 ft or less. 
.thursday...north winds 10 to 20 kt. waves 1 to 3 ft.  

$$

fzus63 kmkx 081951
glflm 
expires:202608090315;;843312

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
251 pm cdt sat aug 8 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...

winds will become southerly by this evening as a low pressure
trough around 29.8 inches approaches from the minnesota arrowhead.
an unsettled weather pattern will set up over the upper great 
lakes all week where weak waves of low pressure will cross the 
region and produce rounds of thunderstorms at times. the first
round of weakening storms should arrive in southern lake michigan
late sunday morning, and additional storms are possible there
sunday night.


lmz261-362-364-366-563-565-567-868-090315-
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-
251 pm cdt sat aug 8 2026

sheboygan wi to pentwater mi north...

.tonight...south winds 10 to 15 kt becoming southwest 10 to
20 kt. waves 1 to 3 ft. 
.sunday...southwest winds 10 to 20 kt becoming south 15 to 25 kt,
then becoming southwest 10 to 20 kt late. chance of showers in
the afternoon. waves 1 to 3 ft building to 2 to 4 ft. 
.sunday night...southwest winds 10 to 20 kt diminishing to 10 to
15 kt late in the evening, then becoming west 5 to 10 kt after
midnight becoming northwest late. patchy fog overnight. waves
2 to 4 ft subsiding to 1 to 3 ft. 
.monday...north winds 10 to 15 kt becoming northwest. patchy
dense fog in the morning. waves 1 to 2 ft. 
.monday night...southeast winds 10 to 15 kt becoming northeast.
waves 1 ft or less. 
.tuesday...northeast winds 5 to 10 kt increasing to 10 to 15 kt.
chance of showers in the morning. waves 1 ft or less.
.tuesday night...northeast winds 10 to 15 kt diminishing to 5 to
10 kt. waves nearly calm. 
.wednesday...west winds 10 to 15 kt becoming southwest 10 to
20 kt. waves 1 ft or less. 
.thursday...north winds 10 to 20 kt increasing to 15 to 25 kt.
waves 1 to 3 ft.  

$$

fzus63 kmqt 082001
glfls 
expires:202608090800;;843574

open lake forecast for lake superior
national weather service marquette mi
401 pm edt sat aug 8 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...

upper michigan is situated between a 29.6 inch northern quebec low 
and a 30.0 inch high centered over northern illinois. this will 
drive weak and ill-defined 29.9 inch ridging/troughing over lake 
superior through monday night as the high moves southeast. weak 
ridging of 30.0 inches, extending between a 30.2 inch bermuda high 
and 30.0 inch ridging over the western canadian provinces, returns 
for monday and tuesday before decreasing to 29.9 inches tuesday 
night. a 29.8 inch trough moves over the lake wednesday before 
ridging of 30.0 inches returns on thursday from the canadian prairie.




lsz265-090800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
401 pm edt sat aug 8 2026

.late this afternoon...west winds 10 to 20 knots. waves calm to
2 feet. 
.tonight...southwest winds 10 to 20 knots veering west late. a
chance of showers. a slight chance of thunderstorms after
midnight. waves calm to 2 feet. 
.sunday...southwest winds 10 to 20 knots becoming east 5 to
15 knots in the afternoon, then backing northeast late. a chance
of showers. waves calm to 2 feet. 
.sunday night...southeast winds 5 to 15 knots veering southwest
after midnight, then veering west late. waves calm to 2 feet. 
.monday...southwest winds 5 to 15 knots veering west by mid
afternoon. waves calm to 2 feet. 
.monday night...southwest winds 5 to 15 knots increasing to 10 to
20 knots after midnight. waves calm to 2 feet. 
.tuesday...southwest winds 5 to 15 knots backing east by mid
afternoon. waves calm to 2 feet. 
.tuesday night...south winds 5 to 15 knots veering west after
midnight. waves calm to 2 feet. 
.wednesday...west winds 10 to 20 knots veering northwest. waves
calm to 2 feet. 
.thursday...northwest 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. 

$$

fzus63 kmqt 082001
glfls 
expires:202608090800;;843575

open lake forecast for lake superior
national weather service marquette mi
401 pm edt sat aug 8 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...

upper michigan is situated between a 29.6 inch northern quebec low 
and a 30.0 inch high centered over northern illinois. this will 
drive weak and ill-defined 29.9 inch ridging/troughing over lake 
superior through monday night as the high moves southeast. weak 
ridging of 30.0 inches, extending between a 30.2 inch bermuda high 
and 30.0 inch ridging over the western canadian provinces, returns 
for monday and tuesday before decreasing to 29.9 inches tuesday 
night. a 29.8 inch trough moves over the lake wednesday before 
ridging of 30.0 inches returns on thursday from the canadian prairie.




lsz266-090800-
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 sat aug 8 2026

.late this afternoon...west winds 10 to 20 knots. waves 1 to
3 feet. 
.tonight...southwest winds 5 to 15 knots becoming south 10 to
20 knots after midnight, then veering southwest late. a chance of
showers. a slight chance of thunderstorms after midnight. waves
subsiding to calm to 2 feet. 
.sunday...west winds 10 to 20 knots diminishing to 5 to 15 knots
in the afternoon, then veering northeast late. a chance of
showers and a slight chance of thunderstorms. waves calm to
2 feet. 
.sunday night...east winds 5 to 15 knots backing northwest after
midnight, then backing west late. a slight chance of showers
through midnight. waves calm to 2 feet. 
.monday...southwest winds 5 to 15 knots veering west by mid
afternoon. waves calm to 2 feet. 
.monday night...west winds 5 to 15 knots backing southwest after
midnight. waves calm to 2 feet. 
.tuesday...southwest winds 5 to 15 knots. waves calm to 2 feet. 
.tuesday night...southwest winds 5 to 15 knots. waves calm to
2 feet. 
.wednesday...west winds 5 to 15 knots becoming northwest 10 to
20 knots. waves calm to 2 feet. 
.thursday...northwest winds 10 to 20 knots. waves building to
1 to 3 feet, then subsiding to calm to 2 feet. 

$$

fzus63 kmqt 082001
glfls 
expires:202608090800;;843576

open lake forecast for lake superior
national weather service marquette mi
401 pm edt sat aug 8 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...

upper michigan is situated between a 29.6 inch northern quebec low 
and a 30.0 inch high centered over northern illinois. this will 
drive weak and ill-defined 29.9 inch ridging/troughing over lake 
superior through monday night as the high moves southeast. weak 
ridging of 30.0 inches, extending between a 30.2 inch bermuda high 
and 30.0 inch ridging over the western canadian provinces, returns 
for monday and tuesday before decreasing to 29.9 inches tuesday 
night. a 29.8 inch trough moves over the lake wednesday before 
ridging of 30.0 inches returns on thursday from the canadian prairie.




lsz267-090800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
401 pm edt sat aug 8 2026

.late this afternoon...west winds 10 to 20 knots. waves calm to
2 feet. 
.tonight...southwest winds 5 to 15 knots backing south after
midnight, then becoming southwest 10 to 20 knots late. a slight
chance of showers after midnight. waves calm to 2 feet. 
.sunday...southwest winds 10 to 20 knots backing southeast in the
afternoon, then becoming northeast 5 to 15 knots late. a chance
of showers and a slight chance of thunderstorms. waves calm to
2 feet. 
.sunday night...northeast winds 5 to 15 knots backing northwest
after midnight. a slight chance of showers through midnight.
waves calm to 2 feet. 
.monday...west winds 5 to 15 knots veering northwest by mid
afternoon. waves calm to 2 feet. 
.monday night...northwest winds 5 to 15 knots backing south after
midnight. waves calm to 2 feet. 
.tuesday...south winds 5 to 15 knots veering northwest by mid
afternoon. waves calm to 2 feet. 
.tuesday night...northwest winds 5 to 15 knots backing west after
midnight. waves calm to 2 feet. 
.wednesday...west winds 5 to 15 knots becoming northwest 10 to
20 knots. waves calm to 2 feet. 
.thursday...northwest winds 10 to 20 knots. waves building to
1 to 3 feet, then subsiding to calm to 2 feet. 

$$

fzus63 kmqt 082001
glfls 
expires:202608090800;;843572

open lake forecast for lake superior
national weather service marquette mi
401 pm edt sat aug 8 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...

upper michigan is situated between a 29.6 inch northern quebec low 
and a 30.0 inch high centered over northern illinois. this will 
drive weak and ill-defined 29.9 inch ridging/troughing over lake 
superior through monday night as the high moves southeast. weak 
ridging of 30.0 inches, extending between a 30.2 inch bermuda high 
and 30.0 inch ridging over the western canadian provinces, returns 
for monday and tuesday before decreasing to 29.9 inches tuesday 
night. a 29.8 inch trough moves over the lake wednesday before 
ridging of 30.0 inches returns on thursday from the canadian prairie.




lsz263-090800-
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 sat aug 8 2026

.late this afternoon...southwest winds 15 to 25 knots. waves 2 to
4 feet. 
.tonight...southwest winds 10 to 20 knots becoming west 5 to
15 knots after midnight. a chance of showers. a slight chance of
thunderstorms after midnight. waves subsiding to calm to 2 feet. 
.sunday...west winds 5 to 15 knots veering north in the
afternoon, then backing southwest late. a slight chance of
showers through early afternoon. waves calm to 2 feet. 
.sunday night...southwest winds 5 to 15 knots diminishing to less
than 10 knots after midnight, then veering west late. waves calm
to 2 feet. 
.monday...west winds 5 to 15 knots becoming southwest 10 to
20 knots by mid afternoon. waves calm to 2 feet. 
.monday night...southwest winds 5 to 15 knots veering west after
midnight. waves calm to 2 feet. 
.tuesday...west winds 5 to 15 knots backing southwest by mid
afternoon. waves calm to 2 feet. 
.tuesday night...southwest winds 5 to 15 knots becoming west less
than 10 knots after midnight. waves calm to 2 feet. 
.wednesday...west winds 5 to 15 knots veering northwest. waves
calm to 2 feet. 
.thursday...west winds 5 to 15 knots veering northwest. waves
calm to 2 feet. 

$$

fzus63 kmqt 082001
glfls 
expires:202608090800;;843571

open lake forecast for lake superior
national weather service marquette mi
401 pm edt sat aug 8 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...

upper michigan is situated between a 29.6 inch northern quebec low 
and a 30.0 inch high centered over northern illinois. this will 
drive weak and ill-defined 29.9 inch ridging/troughing over lake 
superior through monday night as the high moves southeast. weak 
ridging of 30.0 inches, extending between a 30.2 inch bermuda high 
and 30.0 inch ridging over the western canadian provinces, returns 
for monday and tuesday before decreasing to 29.9 inches tuesday 
night. a 29.8 inch trough moves over the lake wednesday before 
ridging of 30.0 inches returns on thursday from the canadian prairie.




lsz162-090800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt sat aug 8 2026 /301 pm cdt sat aug 8 2026/

.late this afternoon...southwest winds 15 to 25 knots. waves 1 to
3 feet. 
.tonight...southwest winds 10 to 20 knots becoming west 5 to
15 knots after midnight, then veering northwest late. a chance of
showers and a slight chance of thunderstorms. waves subsiding to
calm to 2 feet. 
.sunday...west winds 5 to 15 knots backing south in the
afternoon. a slight chance of showers through early afternoon.
waves calm to 2 feet. 
.sunday night...southwest winds 5 to 15 knots veering west after
midnight. waves calm to 2 feet. 
.monday...west winds 5 to 15 knots backing southwest by mid
afternoon. waves calm to 2 feet. 
.monday night...west winds 5 to 15 knots veering north after
midnight. waves calm to 2 feet. 
.tuesday...north winds 5 to 15 knots veering south by mid
afternoon. waves calm to 2 feet. 
.tuesday night...west winds 5 to 15 knots. waves calm to 2 feet. 
.wednesday...west winds 5 to 15 knots veering northwest. waves
calm to 2 feet. 
.thursday...northwest winds 5 to 15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 082001
glfls 
expires:202608090800;;843573

open lake forecast for lake superior
national weather service marquette mi
401 pm edt sat aug 8 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...

upper michigan is situated between a 29.6 inch northern quebec low 
and a 30.0 inch high centered over northern illinois. this will 
drive weak and ill-defined 29.9 inch ridging/troughing over lake 
superior through monday night as the high moves southeast. weak 
ridging of 30.0 inches, extending between a 30.2 inch bermuda high 
and 30.0 inch ridging over the western canadian provinces, returns 
for monday and tuesday before decreasing to 29.9 inches tuesday 
night. a 29.8 inch trough moves over the lake wednesday before 
ridging of 30.0 inches returns on thursday from the canadian prairie.




lsz264-090800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
401 pm edt sat aug 8 2026

.late this afternoon...southwest winds 15 to 25 knots. waves 1 to
3 feet. 
.tonight...southwest winds 10 to 20 knots diminishing to 5 to
15 knots after midnight, then veering west late. a chance of
showers. waves subsiding to calm to 2 feet. 
.sunday...west winds 5 to 15 knots diminishing to less than
10 knots in the afternoon, then becoming south 5 to 15 knots
late. a chance of showers through early afternoon. waves calm to
2 feet. 
.sunday night...south winds less than 10 knots veering southwest
after midnight. waves calm to 2 feet. 
.monday...west winds less than 10 knots becoming southwest 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.monday night...southwest winds 5 to 15 knots becoming west less
than 10 knots after midnight. waves calm to 2 feet. 
.tuesday...west winds less than 10 knots becoming southwest 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.tuesday night...southwest winds less than 10 knots veering west
after midnight. waves calm to 2 feet. 
.wednesday...west winds 5 to 15 knots veering northwest. waves
calm to 2 feet. 
.thursday...northwest winds 5 to 15 knots backing west. waves
calm to 2 feet. 

$$