fzus61 kbuf 120203
glflo 
expires:202608120900;;031100

open lake forecast for lake ontario
national weather service buffalo ny
1003 pm edt tue aug 11 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 weak 29.9 inch high will settle across the lake through wednesday 
morning, before a trough averaging 29.7 inches moves over the lake 
wednesday afternoon where it will linger through thursday. a cold 
front then sweeps across the lake thursday night, with a 30.2 inch 
high pressure ridge building in from the upper great lakes on 
friday, settling over the lower great lakes region on saturday. a 
low averaging 29.8 inches is expected to approaching the lake 
sunday.


loz062-120900-
lake ontario open waters from the niagara river to hamlin beach-
1003 pm edt tue aug 11 2026

.overnight...northwest winds less than 10 knots. waves
1 foot or less. 
.wednesday...northwest winds 10 knots or less becoming southwest.
a chance of showers and thunderstorms late. waves 1 foot or less.
.wednesday night...west winds 10 knots or less. a chance of
showers and thunderstorms in the evening. waves 1 foot or less. 
.thursday...west winds 5 to 10 knots. waves 1 foot or less. 
.thursday night...west winds 5 to 10 knots becoming north. waves
1 foot or less. 
.friday...north winds 5 to 15 knots becoming northeast. waves
2 feet or less. 
.saturday...northeast winds 10 knots or less becoming southeast.
waves 1 foot or less. 
.sunday...south winds 5 to 10 knots becoming northwest. a chance
of showers and thunderstorms. waves 2 feet or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 120203
glflo 
expires:202608120900;;031101

open lake forecast for lake ontario
national weather service buffalo ny
1003 pm edt tue aug 11 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 weak 29.9 inch high will settle across the lake through wednesday 
morning, before a trough averaging 29.7 inches moves over the lake 
wednesday afternoon where it will linger through thursday. a cold 
front then sweeps across the lake thursday night, with a 30.2 inch 
high pressure ridge building in from the upper great lakes on 
friday, settling over the lower great lakes region on saturday. a 
low averaging 29.8 inches is expected to approaching the lake 
sunday.


loz063>065-120900-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1003 pm edt tue aug 11 2026

.overnight...west winds 10 knots or less. waves 2 feet or
less. 
.wednesday...west winds 10 knots or less. waves 1 foot or less. 
.wednesday night...west winds 5 to 10 knots. a chance of showers
and thunderstorms in the evening. waves 1 foot or less. 
.thursday...northwest winds 5 to 10 knots becoming west. waves
2 feet or less. 
.thursday night...west winds 5 to 15 knots becoming north. waves
1 to 2 feet. 
.friday...north winds 5 to 15 knots becoming northeast. waves
2 feet or less. 
.saturday...northeast winds 10 knots or less becoming south.
waves 1 foot or less. 
.sunday...south winds 5 to 10 knots becoming west. a chance of
showers and thunderstorms. waves 2 feet or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 120152
glfle 
expires:202608120815;;030543

open lake forecast for lake erie
national weather service cleveland oh
952 pm edt tue aug 11 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 stationary front will continue to waver south of lake erie through
mid week with an area of low pressure 29.80 inches situated over 
the ohio valley. this will move south as a cold front thursday
and high pressure 30.20 inches builds into the region through
saturday evening. low pressure 29.90 inches moves into the region
on sunday with a cold front passing over the lake sunday evening.


lez165>167-120815-
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-
952 pm edt tue aug 11 2026

.rest of tonight...west winds 10 knots or less. a slight chance
of showers and thunderstorms late this evening, then a slight
chance of showers after midnight. waves 1 foot or less. 
.wednesday...southwest winds 5 to 10 knots becoming west. a
slight chance of showers early. a slight chance of showers and
thunderstorms late. waves 1 foot or less. 
.wednesday night...west winds 5 to 10 knots. a chance of showers.
waves 1 foot or less. 
.thursday...east winds 10 knots or less becoming northwest. a
chance of showers. waves 1 foot or less. 
.thursday night...northwest winds 5 to 15 knots becoming
northeast. waves 2 feet or less. 
.friday...northeast winds 5 to 15 knots becoming east. waves 1 to
3 feet. 
.saturday...east winds 5 to 10 knots becoming southeast. a chance
of showers saturday night. waves 1 to 2 feet. 
.sunday...south winds 10 to 15 knots becoming northwest. showers
likely with a chance of thunderstorms during the day, then a
chance of showers sunday night. waves 1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 120152
glfle 
expires:202608120815;;030544

open lake forecast for lake erie
national weather service cleveland oh
952 pm edt tue aug 11 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 stationary front will continue to waver south of lake erie through
mid week with an area of low pressure 29.80 inches situated over 
the ohio valley. this will move south as a cold front thursday
and high pressure 30.20 inches builds into the region through
saturday evening. low pressure 29.90 inches moves into the region
on sunday with a cold front passing over the lake sunday evening.


lez061-168-169-120815-
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-
952 pm edt tue aug 11 2026

.rest of tonight...west winds less than 10 knots becoming
northwest. a slight chance of showers and thunderstorms late this
evening, then a slight chance of showers after midnight. waves
1 foot or less. 
.wednesday...west winds 10 knots or less. a chance of showers
with a slight chance of thunderstorms late. waves 1 foot or less.
.wednesday night...west winds 5 to 10 knots. a chance of showers
and thunderstorms in the evening, then a chance of showers
overnight. waves 1 foot or less. 
.thursday...north winds less than 10 knots becoming west. a
chance of showers. waves 1 foot or less. 
.thursday night...west winds 10 knots or less becoming northeast.
waves 2 feet or less. 
.friday...northeast winds 5 to 15 knots. waves 2 feet or less. 
.saturday...east winds 5 to 10 knots becoming southeast. a chance
of showers saturday night. waves 2 feet or less. 
.sunday...south winds 10 to 15 knots becoming northwest. showers
likely with a chance of thunderstorms during the day, then a
chance of showers sunday night. waves 1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 120152
glfle 
expires:202608120815;;030542

open lake forecast for lake erie
national weather service cleveland oh
952 pm edt tue aug 11 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 stationary front will continue to waver south of lake erie through
mid week with an area of low pressure 29.80 inches situated over 
the ohio valley. this will move south as a cold front thursday
and high pressure 30.20 inches builds into the region through
saturday evening. low pressure 29.90 inches moves into the region
on sunday with a cold front passing over the lake sunday evening.


lez162>164-120815-
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-
952 pm edt tue aug 11 2026

.rest of tonight...west winds 5 to 10 knots. a slight chance of
showers and thunderstorms late this evening, then a slight chance
of showers after midnight. waves 1 foot or less. 
.wednesday...west winds 5 to 10 knots becoming southwest. a
slight chance of showers and thunderstorms in the afternoon.
waves 1 foot or less. 
.wednesday night...southwest winds 5 to 10 knots becoming
northwest. a chance of showers in the evening. waves 1 foot or
less. 
.thursday...east winds 10 knots or less. a chance of showers and
thunderstorms in the afternoon. waves 1 foot or less. 
.thursday night...southeast winds 5 to 10 knots becoming
northeast. a chance of showers. waves 1 foot or less. 
.friday...northeast winds 5 to 15 knots. waves 2 feet or less. 
.saturday...east winds 5 to 10 knots becoming south. a chance of
showers and thunderstorms saturday night. waves 2 feet or less. 
.sunday...southwest winds 10 to 15 knots becoming northwest. a
chance of showers and thunderstorms during the day, then a chance
of showers sunday night. waves 1 to 2 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 120224
glflh 
expires:202608121030;;032042

open lake forecast for lake huron
national weather service detroit/pontiac mi
1024 pm edt tue aug 11 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 quasi-stationary front holds over the southern great
lakes through thursday, bringing waves of showers and
thunderstorms across the waters. high pressure, 30.00 inches,
will dominate the region to the north of the front. light winds
will be variable over the next 2 days, but maintain an overall
northerly trend over lake huron and southerly toward western lake
erie.


lhz462>464-121030-
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-
1024 pm edt tue aug 11 2026

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


$$

fzus63 kdtx 120224
glfsc 
expires:202608121030;;032044

lake st clair forecast
national weather service detroit/pontiac mi
1024 pm edt tue aug 11 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 quasi-stationary front holds over the southern great
lakes through thursday, bringing waves of showers and
thunderstorms across the waters. high pressure, 30.00 inches,
will dominate the region to the north of the front. light winds
will be variable over the next 2 days, but maintain an overall
northerly trend over lake huron and southerly toward western lake
erie.


lcz460-121030-
lake st clair-
1024 pm edt tue aug 11 2026

.rest of tonight...southwest winds 5 to 10 knots veering to the
northwest after midnight. mostly clear. waves 2 feet or less.
.wednesday...light and variable winds becoming southwest 5 to 10
knots late in the morning...then backing to the south in the
afternoon. partly sunny. a chance of light showers late in the
afternoon. waves 2 feet or less.
.wednesday night...south winds 5 to 10 knots backing to the
northeast by midnight...then becoming light and variable after
midnight. partly cloudy. a chance of light showers early in the
evening. waves 2 feet or less.
.thursday...light and variable winds becoming east 5 to 10 knots
early in the afternoon. partly sunny. waves nearly calm.
.thursday night...northeast winds 5 to 10 knots increasing to 10 to
15 knots after midnight. mostly cloudy early in the evening becoming
partly cloudy. waves 2 feet or less.
.friday...northeast winds 10 to 15 knots increasing to 15 to 20
knots in the evening. mostly clear. waves 2 feet or less.
.saturday...southeast winds 10 to 15 knots. partly cloudy. a chance
of showers. waves 2 feet or less.
.sunday...northwest winds 10 to 15 knots. partly cloudy. showers
likely and a chance of thunderstorms. waves 2 feet or less.

$$

fzus63 kdtx 120224
glflh 
expires:202608121030;;032040

open lake forecast for lake huron
national weather service detroit/pontiac mi
1024 pm edt tue aug 11 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 quasi-stationary front holds over the southern great
lakes through thursday, bringing waves of showers and
thunderstorms across the waters. high pressure, 30.00 inches,
will dominate the region to the north of the front. light winds
will be variable over the next 2 days, but maintain an overall
northerly trend over lake huron and southerly toward western lake
erie.


lhz361-121030-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
1024 pm edt tue aug 11 2026

.rest of tonight...light and variable winds. waves 2 feet or
less. 
.wednesday...light and variable winds becoming west 5 to 10 knots
late in the afternoon. waves 2 feet or less. 
.wednesday night...west winds 5 to 10 knots. waves 2 feet or
less. 
.thursday...northwest winds 5 to 10 knots. waves 2 feet or less. 
.thursday night...northwest winds 5 to 10 knots becoming north
10 to 15 knots in the late evening and overnight. waves 2 feet or
less. 
.friday...north winds 5 to 10 knots in the morning becoming light
and variable. waves 2 feet or less. 
.saturday...southeast winds 5 to 10 knots increasing to 10 to
15 knots . a chance of showers . waves 2 feet or less building to
2 to 4 feet . 
.sunday...southeast winds 5 to 10 knots becoming south 10 to
15 knots in the late morning and early afternoon...then becoming
west 5 to 10 knots early in the evening becoming northwest 10 to
15 knots by midnight. a chance of showers until afternoon. waves
1 to 3 feet. 


$$

fzus63 kdtx 120224
glflh 
expires:202608121030;;032041

open lake forecast for lake huron
national weather service detroit/pontiac mi
1024 pm edt tue aug 11 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 quasi-stationary front holds over the southern great
lakes through thursday, bringing waves of showers and
thunderstorms across the waters. high pressure, 30.00 inches,
will dominate the region to the north of the front. light winds
will be variable over the next 2 days, but maintain an overall
northerly trend over lake huron and southerly toward western lake
erie.


lhz362-363-121030-
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-
1024 pm edt tue aug 11 2026

.rest of tonight...light and variable winds. waves 2 feet or
less. 
.wednesday...light and variable winds. waves 2 feet or less. 
.wednesday night...light and variable winds becoming west 5 to
10 knots after midnight. waves 2 feet or less. 
.thursday...northwest winds 5 to 10 knots veering to the north in
the late morning and afternoon. waves 2 feet or less. 
.thursday night...north winds 5 to 10 knots increasing to 10 to
15 knots after midnight. waves 2 feet or less. 
.friday...north winds 10 to 15 knots becoming light and variable.
waves 2 feet or less. 
.saturday...southeast winds 5 to 10 knots increasing to 10 to
15 knots by midnight. a chance of showers . waves 2 feet or less.
.sunday...south winds 10 to 15 knots becoming west 5 to 10 knots
. a chance of showers. waves 1 to 3 feet. 


$$

fzus63 kmkx 120158
glflm 
expires:202608120915;;030754

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
858 pm cdt tue aug 11 2026

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

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

.synopsis...

light and variable winds are expected to continue through 
thursday as a stalled frontal boundary remains south of the lake 
bringing periodic shower and thunderstorm chances for southern 
portions of lake michigan along with patchy fog. influence from 
this front finally moves away from the region as high pressure 
around around 30.3 inches builds down across the great lakes 
region thursday night into friday. will see south to southeasterly
winds increase into the weekend as the high pressure slides east 
of the area while low pressure develops over the plains. expect 
this low pressure to track northeastward across the upper great 
lakes later saturday into sunday bringing shower and thunderstorm
chances to the lake. behind this departing low pressure, winds
shift to the northwest later sunday into early next week as
another high pressure builds down across the region.


lmz261-362-364-366-563-565-567-868-120915-
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-
858 pm cdt tue aug 11 2026

sheboygan wi to pentwater mi north...

.rest of tonight...south winds 5 to 10 kt backing to northeast.
patchy fog. slight chance of showers and thunderstorms overnight.
waves nearly calm. 
.wednesday...east winds less than 10 kt becoming northeast late
in the morning, then becoming north 10 to 15 kt in the afternoon.
patchy fog in the morning. waves 1 ft or less. 
.wednesday night...east winds 10 to 15 kt becoming northeast.
waves 1 ft or less. 
.thursday...northeast winds 5 to 10 kt becoming north 10 to 20 kt
in the afternoon. waves 1 to 2 ft. 
.thursday night...north winds 10 to 20 kt becoming northeast.
waves 2 to 4 ft. 
.friday...northeast winds 10 to 20 kt increasing to 15 to 25 kt.
waves 2 to 4 ft. 
.friday night...northeast winds 15 to 25 kt becoming southeast.
waves 3 to 5 ft. 
.saturday...southeast winds to 30 kt. chance of showers. waves
5 to 8 ft occasionally to 10 ft. 
.sunday...west winds 10 to 20 kt becoming northwest. chance of
showers. waves 2 to 4 ft.  

$$

fzus63 kmkx 120158
glflm 
expires:202608120915;;030755

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
858 pm cdt tue aug 11 2026

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

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

.synopsis...

light and variable winds are expected to continue through 
thursday as a stalled frontal boundary remains south of the lake 
bringing periodic shower and thunderstorm chances for southern 
portions of lake michigan along with patchy fog. influence from 
this front finally moves away from the region as high pressure 
around around 30.3 inches builds down across the great lakes 
region thursday night into friday. will see south to southeasterly
winds increase into the weekend as the high pressure slides east 
of the area while low pressure develops over the plains. expect 
this low pressure to track northeastward across the upper great 
lakes later saturday into sunday bringing shower and thunderstorm
chances to the lake. behind this departing low pressure, winds
shift to the northwest later sunday into early next week as
another high pressure builds down across the region.


lmz080-669-671-673-675-777-779-870-872-874-876-878-120915-
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-
858 pm cdt tue aug 11 2026

sheboygan wi to pentwater mi south...

.rest of tonight...south winds 5 to 10 kt becoming southeast.
patchy fog overnight. slight chance of showers and thunderstorms
overnight. waves 1 ft or less. 
.wednesday...southeast winds 5 to 10 kt backing to north. patchy
fog in the morning. waves 2 to 4 ft subsiding to 1 to 2 ft. 
.wednesday night...northeast winds 5 to 10 kt becoming east.
waves 1 ft or less. 
.thursday...east winds 5 to 10 kt becoming northeast 10 to 20 kt
in the afternoon. chance of showers. waves 1 to 2 ft. 
.thursday night...northeast winds 10 to 20 kt. chance of showers
in the evening. waves 2 to 4 ft building to 3 to 5 ft. 
.friday...northeast winds 10 to 20 kt increasing to 15 to 25 kt.
waves 3 to 5 ft. 
.friday night...northeast winds 10 to 20 kt becoming southeast
15 to 25 kt. waves 2 to 4 ft building to 3 to 5 ft. 
.saturday...southeast winds to 30 kt. chance of showers and
thunderstorms. waves 5 to 8 ft occasionally to 10 ft. 
.sunday...west winds 10 to 20 kt becoming northwest. chance of
showers. waves 2 to 4 ft.  

$$

fzus63 kmqt 120201
glfls 
expires:202608120800;;030998

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt tue aug 11 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...


tonight, 29.6 inch low pressure over labrador low descends to the 
gulf of st lawrence and deepens to 29.5 inches while a plains low 
deepens to 29.7 inches, eroding the ridge over lake superior to 29.8 
inches. this pattern holds until thursday morning, when a 30.2 inch 
high over the canadian rockies begins to extend stronger ridging 
over lake superior before eventually becoming centered over the lake 
at 30.2 inches friday afternoon. a 29.9 inch trough then moves over 
the western end of the lake saturday afternoon as the 30.2 inch high 
moves over the eastern great lakes. this trough consolidates to a 
29.8 inch low as it passes over lake superior, reaching ontario by 
sunday afternoon, with 30.1 inch ridging to follow.




lsz266-120800-
lake superior east of a line from manitou island to marquette mi
and west of a line from grand marais mi to the us/canadian border
beyond 5nm from shore-
1001 pm edt tue aug 11 2026

.rest of tonight...south winds 5 to 15 knots veering southwest
after midnight, then backing south late. waves calm to 2 feet. 
.wednesday...south winds 5 to 15 knots veering west in the
afternoon, then veering northwest late. waves calm to 2 feet. 
.wednesday night...northwest winds 5 to 15 knots. waves calm to
2 feet. 
.thursday...northwest winds 5 to 15 knots. waves calm to 2 feet. 
.thursday night...north winds 5 to 15 knots. waves calm to
2 feet. 
.friday...north winds 5 to 15 knots veering northeast by mid
afternoon. waves calm to 2 feet. 
.friday night...east winds 5 to 15 knots veering southeast after
midnight. waves calm to 2 feet. 
.saturday...southeast winds 15 to 25 knots veering south. a
chance of showers, then showers likely. waves building to 1 to
3 feet, then subsiding to calm to 2 feet. 
.sunday...northwest winds 10 to 20 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 120201
glfls 
expires:202608120800;;030999

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt tue aug 11 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...


tonight, 29.6 inch low pressure over labrador low descends to the 
gulf of st lawrence and deepens to 29.5 inches while a plains low 
deepens to 29.7 inches, eroding the ridge over lake superior to 29.8 
inches. this pattern holds until thursday morning, when a 30.2 inch 
high over the canadian rockies begins to extend stronger ridging 
over lake superior before eventually becoming centered over the lake 
at 30.2 inches friday afternoon. a 29.9 inch trough then moves over 
the western end of the lake saturday afternoon as the 30.2 inch high 
moves over the eastern great lakes. this trough consolidates to a 
29.8 inch low as it passes over lake superior, reaching ontario by 
sunday afternoon, with 30.1 inch ridging to follow.




lsz267-120800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
1001 pm edt tue aug 11 2026

.rest of tonight...west winds less than 10 knots. waves calm to
2 feet. 
.wednesday...south winds 5 to 15 knots backing north in the
afternoon, then backing northwest late. waves calm to 2 feet. 
.wednesday night...northwest winds 5 to 15 knots. waves calm to
2 feet. 
.thursday...northwest winds 5 to 15 knots. waves calm to 2 feet. 
.thursday night...north winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. waves calm to 2 feet. 
.friday...north winds 5 to 15 knots backing northwest by mid
afternoon. waves calm to 2 feet. 
.friday night...north winds 5 to 15 knots veering southeast after
midnight. waves calm to 2 feet. 
.saturday...southeast winds 10 to 20 knots. a chance of showers.
waves calm to 2 feet. 
.sunday...northwest winds 10 to 20 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 120201
glfls 
expires:202608120800;;030994

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt tue aug 11 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...


tonight, 29.6 inch low pressure over labrador low descends to the 
gulf of st lawrence and deepens to 29.5 inches while a plains low 
deepens to 29.7 inches, eroding the ridge over lake superior to 29.8 
inches. this pattern holds until thursday morning, when a 30.2 inch 
high over the canadian rockies begins to extend stronger ridging 
over lake superior before eventually becoming centered over the lake 
at 30.2 inches friday afternoon. a 29.9 inch trough then moves over 
the western end of the lake saturday afternoon as the 30.2 inch high 
moves over the eastern great lakes. this trough consolidates to a 
29.8 inch low as it passes over lake superior, reaching ontario by 
sunday afternoon, with 30.1 inch ridging to follow.




lsz162-120800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 pm edt tue aug 11 2026 /901 pm cdt tue aug 11 2026/

.rest of tonight...east winds 5 to 15 knots backing northeast
after midnight, then becoming northwest less than 10 knots late.
patchy fog after midnight. waves calm to 2 feet. 
.wednesday...northwest winds less than 10 knots becoming
southwest 5 to 15 knots in the afternoon. waves calm to 2 feet. 
.wednesday night...northeast winds 5 to 15 knots. a slight chance
of showers after midnight. waves calm to 2 feet. 
.thursday...northeast winds 5 to 15 knots veering east by mid
afternoon. waves calm to 2 feet. 
.thursday night...northeast winds 5 to 15 knots. waves calm to
2 feet. 
.friday...northeast winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. waves building to 1 to 3 feet. 
.friday night...east winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. waves subsiding to calm to 2 feet. 
.saturday...east winds 10 to 20 knots becoming northwest 5 to
15 knots. a chance of showers. waves calm to 2 feet. 
.sunday...west winds 5 to 15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 120201
glfls 
expires:202608120800;;030996

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt tue aug 11 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...


tonight, 29.6 inch low pressure over labrador low descends to the 
gulf of st lawrence and deepens to 29.5 inches while a plains low 
deepens to 29.7 inches, eroding the ridge over lake superior to 29.8 
inches. this pattern holds until thursday morning, when a 30.2 inch 
high over the canadian rockies begins to extend stronger ridging 
over lake superior before eventually becoming centered over the lake 
at 30.2 inches friday afternoon. a 29.9 inch trough then moves over 
the western end of the lake saturday afternoon as the 30.2 inch high 
moves over the eastern great lakes. this trough consolidates to a 
29.8 inch low as it passes over lake superior, reaching ontario by 
sunday afternoon, with 30.1 inch ridging to follow.




lsz264-120800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
1001 pm edt tue aug 11 2026

.rest of tonight...south winds less than 10 knots veering west
late. waves calm to 2 feet. 
.wednesday...west winds less than 10 knots veering northwest
late. waves calm to 2 feet. 
.wednesday night...west winds less than 10 knots veering
northwest late. waves calm to 2 feet. 
.thursday...north winds less than 10 knots. waves calm to 2 feet.
.thursday night...north winds less than 10 knots. waves calm to
2 feet. 
.friday...northeast winds 5 to 15 knots veering east by mid
afternoon. waves calm to 2 feet. 
.friday night...southeast winds 5 to 15 knots. waves calm to
2 feet. 
.saturday...southeast winds 10 to 20 knots. a chance of showers.
waves building to 1 to 3 feet, then subsiding to calm to 2 feet. 
.sunday...northwest winds 5 to 15 knots backing west. waves calm
to 2 feet. 

$$

fzus63 kmqt 120201
glfls 
expires:202608120800;;030995

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt tue aug 11 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...


tonight, 29.6 inch low pressure over labrador low descends to the 
gulf of st lawrence and deepens to 29.5 inches while a plains low 
deepens to 29.7 inches, eroding the ridge over lake superior to 29.8 
inches. this pattern holds until thursday morning, when a 30.2 inch 
high over the canadian rockies begins to extend stronger ridging 
over lake superior before eventually becoming centered over the lake 
at 30.2 inches friday afternoon. a 29.9 inch trough then moves over 
the western end of the lake saturday afternoon as the 30.2 inch high 
moves over the eastern great lakes. this trough consolidates to a 
29.8 inch low as it passes over lake superior, reaching ontario by 
sunday afternoon, with 30.1 inch ridging to follow.




lsz263-120800-
lake superior from saxon harbor wi to upper entrance to portage
canal mi 5nm off shore to the us/canadian border including isle
royale national park-
1001 pm edt tue aug 11 2026

.rest of tonight...east winds less than 10 knots veering
southwest after midnight, then veering west late. waves calm to
2 feet. 
.wednesday...west winds less than 10 knots increasing to 5 to
15 knots in the afternoon, then backing south late. waves calm to
2 feet. 
.wednesday night...east winds 5 to 15 knots becoming northeast
less than 10 knots after midnight. a slight chance of showers
after midnight. waves calm to 2 feet. 
.thursday...northeast winds 5 to 15 knots veering east by mid
afternoon. waves calm to 2 feet. 
.thursday night...northeast winds 5 to 15 knots. waves calm to
2 feet. 
.friday...east winds 5 to 15 knots increasing to 15 to 25 knots
by mid afternoon. waves calm to 2 feet. 
.friday night...east winds 10 to 20 knots becoming southeast 5 to
15 knots after midnight. waves calm to 2 feet. 
.saturday...east winds 5 to 15 knots backing northwest. a chance
of showers. waves calm to 2 feet. 
.sunday...west winds 5 to 15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 120201
glfls 
expires:202608120800;;030997

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt tue aug 11 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...


tonight, 29.6 inch low pressure over labrador low descends to the 
gulf of st lawrence and deepens to 29.5 inches while a plains low 
deepens to 29.7 inches, eroding the ridge over lake superior to 29.8 
inches. this pattern holds until thursday morning, when a 30.2 inch 
high over the canadian rockies begins to extend stronger ridging 
over lake superior before eventually becoming centered over the lake 
at 30.2 inches friday afternoon. a 29.9 inch trough then moves over 
the western end of the lake saturday afternoon as the 30.2 inch high 
moves over the eastern great lakes. this trough consolidates to a 
29.8 inch low as it passes over lake superior, reaching ontario by 
sunday afternoon, with 30.1 inch ridging to follow.




lsz265-120800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
1001 pm edt tue aug 11 2026

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

$$