fzus61 kbuf 110803
glflo 
expires:202608111500;;985889

open lake forecast for lake ontario
national weather service buffalo ny
403 am 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 today 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.


loz062-111500-
lake ontario open waters from the niagara river to hamlin beach-
403 am edt tue aug 11 2026

.today...west winds 5 to 10 knots becoming southwest. waves
1 foot or less. 
.tonight...west winds less than 10 knots becoming north. waves
1 foot or less. 
.wednesday...light and variable winds. a chance of showers in the
afternoon. waves 1 foot or less. 
.wednesday night...northeast winds 10 knots or less becoming
northwest. a chance of showers. waves 1 foot or less. 
.thursday...northwest winds 5 to 10 knots. waves 2 feet or less. 
.friday...north winds 5 to 15 knots. waves 1 to 2 feet. 
.saturday...north winds 10 knots or less becoming south. waves
1 foot or less. 

$$

fzus61 kbuf 110803
glflo 
expires:202608111500;;985890

open lake forecast for lake ontario
national weather service buffalo ny
403 am 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 today 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.


loz063>065-111500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
403 am edt tue aug 11 2026

.today...northwest winds 5 to 10 knots becoming west. waves
2 feet or less. 
.tonight...west winds 10 knots or less becoming northwest. waves
2 feet or less. 
.wednesday...northwest winds 10 knots or less becoming west.
waves 1 foot or less. 
.wednesday night...northwest winds 5 to 10 knots. a chance of
showers. waves 1 foot or less. 
.thursday...northwest winds 5 to 15 knots. waves 2 feet or less. 
.friday...northwest winds 5 to 15 knots becoming north. waves
1 to 2 feet. 
.saturday...north winds 10 knots or less becoming south. waves
2 feet or less. 

$$

fzus61 kcle 110749
glfle 
expires:202608111415;;985516

open lake forecast for lake erie
national weather service cleveland oh
349 am 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 oscillate near lake erie through mid week
with areas of low pressure around 29.90 inches rippling along it.
it then passes through as a cold front thursday with high pressure
30.20 inches building in for the end of the week and the weekend.


lez165>167-111415-
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-
349 am edt tue aug 11 2026

.today...west winds 10 knots or less. a chance of showers with a
slight chance of thunderstorms this morning, then a chance of
showers and thunderstorms this afternoon. waves 2 feet or less. 
.tonight...west winds 10 knots or less becoming north. a chance
of showers and thunderstorms early, then a slight chance of
showers and thunderstorms late in the evening. a slight chance of
showers after midnight. waves 1 foot or less. 
.wednesday...north winds 10 knots or less becoming west. waves
1 foot or less. 
.wednesday night...west winds 5 to 10 knots becoming northwest. a
chance of showers and thunderstorms. waves 1 foot or less. 
.thursday...northwest winds 5 to 15 knots becoming north. a
chance of showers thursday night. waves 2 feet or less. 
.friday...north winds 5 to 15 knots becoming northeast. waves
1 to 2 feet. 
.saturday...east winds 5 to 10 knots becoming southeast. a chance
of showers and thunderstorms saturday night. waves 1 to 2 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 110749
glfle 
expires:202608111415;;985517

open lake forecast for lake erie
national weather service cleveland oh
349 am 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 oscillate near lake erie through mid week
with areas of low pressure around 29.90 inches rippling along it.
it then passes through as a cold front thursday with high pressure
30.20 inches building in for the end of the week and the weekend.


lez061-168-169-111415-
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-
349 am edt tue aug 11 2026

.today...west winds 10 knots or less. a chance of showers with a
slight chance of thunderstorms early, then a slight chance of
showers late this morning. a slight chance of showers and
thunderstorms late. waves around 1 foot. 
.tonight...west winds less than 10 knots becoming northeast. a
slight chance of showers. waves 1 foot or less. 
.wednesday...northeast winds less than 10 knots becoming
northwest. waves 1 foot or less. 
.wednesday night...west winds 10 knots or less. a chance of
showers. waves 1 foot or less. 
.thursday...northwest winds 5 to 15 knots becoming north. waves
2 feet or less. 
.friday...north winds 5 to 15 knots becoming northeast. waves
2 feet or less. 
.saturday...east winds 5 to 10 knots becoming southeast. waves
2 feet or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 110749
glfle 
expires:202608111415;;985515

open lake forecast for lake erie
national weather service cleveland oh
349 am 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 oscillate near lake erie through mid week
with areas of low pressure around 29.90 inches rippling along it.
it then passes through as a cold front thursday with high pressure
30.20 inches building in for the end of the week and the weekend.


lez162>164-111415-
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-
349 am edt tue aug 11 2026

.today...west winds 10 knots or less becoming southwest. showers
likely with a chance of thunderstorms. waves 1 foot or less. 
.tonight...southwest winds 5 to 10 knots becoming west. showers
likely with a chance of thunderstorms early, then a slight chance
of showers and thunderstorms late in the evening. a slight chance
of showers after midnight. waves 1 foot or less. 
.wednesday...northwest winds 10 knots or less becoming southwest.
waves 1 foot or less. 
.wednesday night...west winds 10 knots or less becoming
northwest. a chance of showers. waves 1 foot or less. 
.thursday...northwest winds 5 to 15 knots becoming northeast. a
chance of showers. 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 south. a chance of
showers and thunderstorms saturday night. waves 2 feet or less. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 110712
glfsc 
expires:202608111515;;984602

lake st clair forecast
national weather service detroit/pontiac mi
312 am 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 mid-week, 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 through the week, but maintain an overall
northerly trend over lake huron and southerly south of port
huron.


lcz460-111515-
lake st clair-
312 am edt tue aug 11 2026

.today...northwest winds 5 to 10 knots early in the morning becoming
light and variable. partly sunny. a chance of showers and
thunderstorms in the afternoon. waves 2 feet or less.
.tonight...south winds 5 to 10 knots this evening becoming light and
variable. partly cloudy with a chance of showers and thunderstorms
early in the evening...then partly cloudy in the late evening and
overnight. waves 2 feet or less.
.wednesday...light and variable winds becoming south 5 to 10 knots
early in the afternoon. mostly sunny. a chance of showers and
thunderstorms early in the afternoon. waves 2 feet or less.
.wednesday night...northwest winds 5 to 10 knots early in the
evening becoming light and variable. partly cloudy. a chance of
showers and thunderstorms early in the evening...then a chance of
light showers by midnight. waves 2 feet or less.
.thursday...north winds 5 to 10 knots. mostly sunny in the morning
becoming partly cloudy. waves 2 feet or less.
.friday...northeast winds 10 to 15 knots. mostly clear. waves 2 feet
or less.
.saturday...southeast winds 5 to 10 knots. partly cloudy. a chance
of showers and thunderstorms. waves 2 feet or less.

$$

fzus63 kdtx 110712
glflh 
expires:202608111515;;984615

open lake forecast for lake huron
national weather service detroit/pontiac mi
312 am 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 mid-week, 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 through the week, but maintain an overall
northerly trend over lake huron and southerly south of port
huron.


lhz361-111515-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
312 am edt tue aug 11 2026

.today...light and variable winds. waves 2 feet or less. 
.tonight...light and variable winds. a chance of showers after
midnight. waves 2 feet or less. 
.wednesday...light and variable winds. waves 2 feet or less. 
.wednesday night...northwest winds 5 to 10 knots. waves 2 feet or
less. 
.thursday...northwest winds 5 to 10 knots increasing to 10 to
15 knots late in the afternoon. waves 2 feet or less. 
.friday...north winds 5 to 10 knots backing to the west early in
the evening...then veering to the west 5 to 10 knots by midnight.
waves 2 feet or less. 
.saturday...light and variable winds becoming southeast 5 to
10 knots. a chance of showers by midnight. waves 2 feet or less. 


$$

fzus63 kdtx 110712
glflh 
expires:202608111515;;984616

open lake forecast for lake huron
national weather service detroit/pontiac mi
312 am 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 mid-week, 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 through the week, but maintain an overall
northerly trend over lake huron and southerly south of port
huron.


lhz362-363-111515-
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-
312 am edt tue aug 11 2026

.today...light and variable winds. waves 2 feet or less. 
.tonight...light and variable winds. a chance of showers after
midnight. locally heavy rainfall possible after midnight. waves
2 feet or less. 
.wednesday...light and variable winds. a chance of showers. waves
2 feet or less. 
.wednesday night...light and variable winds becoming northwest
5 to 10 knots after midnight. waves 2 feet or less. 
.thursday...northwest winds 5 to 10 knots increasing to 10 to
15 knots late in the evening. waves 2 feet or less. 
.friday...north winds 10 to 15 knots becoming light and variable.
waves 1 to 3 feet. 
.saturday...light and variable winds becoming southeast 5 to
10 knots . a chance of showers by midnight. waves 2 feet or less.


$$

fzus63 kdtx 110712
glflh 
expires:202608111515;;984617

open lake forecast for lake huron
national weather service detroit/pontiac mi
312 am 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 mid-week, 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 through the week, but maintain an overall
northerly trend over lake huron and southerly south of port
huron.


lhz462>464-111515-
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-
312 am edt tue aug 11 2026

.today...light and variable winds. waves 2 feet or less. 
.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 north 5 to
10 knots after midnight. waves 2 feet or less. 
.thursday...north winds 5 to 10 knots increasing to 10 to
15 knots late in the evening. waves 2 feet or less. 
.friday...north winds 10 to 15 knots decreasing to 5 to 10 knots
by midnight. waves 1 to 3 feet. 
.saturday...northeast winds 5 to 10 knots veering to the east. a
chance of showers by midnight. waves 2 feet or less. 


$$

fzus63 kmkx 110821
glflm 
expires:202608111530;;987273

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
321 am 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 southeasterly to southerly winds will continue over the
southern half of lake michigan today, while light and variable
winds will continue over the northern half. some marine dense fog
has formed early this morning along the wisconsin shoreline of 
the lake, and this fog should continue into the mid- morning 
before storms roll across the lake. light and variable winds will
then be prevalent over the whole lake tonight.

this weather pattern will continue through midweek with periodic 
shower and thunderstorm chances for southern portions of the lake 
as small areas of low pressure follow along the stalled front. the
front finally begins to sag southward through the end of the week
allowing high pressure around 30.2 inches to build down across 
the upper great lakes through friday. then as the high pressure 
pushes east expect low pressure to develop over the plains and 
track across the great lakes through the weekend bringing 
increasing southerly winds.


lmz261-362-364-366-563-565-567-868-111530-
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-
321 am cdt tue aug 11 2026

sheboygan wi to pentwater mi north...

.today...southeast winds 5 to 10 kt becoming east. patchy fog
this morning. waves nearly calm. 
.tonight...east winds 5 to 10 kt. patchy fog overnight. slight
chance of showers and thunderstorms overnight. waves nearly calm.
.wednesday...east winds 5 to 10 kt backing to northwest. waves
nearly calm. 
.wednesday night...north winds 10 to 15 kt diminishing to 5 to
10 kt. waves 1 ft or less. 
.thursday...north winds 10 to 15 kt increasing to 10 to 20 kt.
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. 
.saturday...southeast winds 15 to 25 kt. chance of showers. waves
4 to 7 ft occasionally to 9 ft.  

$$

fzus63 kmkx 110821
glflm 
expires:202608111530;;987274

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
321 am 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 southeasterly to southerly winds will continue over the
southern half of lake michigan today, while light and variable
winds will continue over the northern half. some marine dense fog
has formed early this morning along the wisconsin shoreline of 
the lake, and this fog should continue into the mid- morning 
before storms roll across the lake. light and variable winds will
then be prevalent over the whole lake tonight.

this weather pattern will continue through midweek with periodic 
shower and thunderstorm chances for southern portions of the lake 
as small areas of low pressure follow along the stalled front. the
front finally begins to sag southward through the end of the week
allowing high pressure around 30.2 inches to build down across 
the upper great lakes through friday. then as the high pressure 
pushes east expect low pressure to develop over the plains and 
track across the great lakes through the weekend bringing 
increasing southerly winds.


lmz080-669-671-673-675-777-779-870-872-874-876-878-111530-
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-
321 am cdt tue aug 11 2026

sheboygan wi to pentwater mi south...

.today...southeast winds 5 to 10 kt becoming south. patchy dense
fog this morning. chance of showers and thunderstorms. waves 1 ft
or less. 
.tonight...south winds 5 to 10 kt. patchy fog overnight. waves
1 ft or less. 
.wednesday...south winds 5 to 10 kt backing to northeast. patchy
fog in the morning. waves nearly calm. 
.wednesday night...northeast winds 5 to 10 kt becoming north.
waves 1 ft or less. 
.thursday...northeast winds 10 to 15 kt becoming north 10 to
20 kt. chance of showers in the morning. waves 1 to 2 ft. 
.thursday night...north winds 10 to 20 kt becoming northeast.
waves 1 to 3 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. 
.saturday...southeast winds 15 to 25 kt. chance of showers. waves
4 to 7 ft occasionally to 9 ft.  

$$

fzus63 kmqt 110801
glfls 
expires:202608112000;;985751

open lake forecast for lake superior
national weather service marquette mi
401 am 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...

this morning, lake superior is under weak 29.9 inch ridging broadly 
associated with 30.1 inch high pressure over the appalachians while 
29.6 inch low pressure is over labrador and 29.8 inch low pressure 
is over the central plains. by tonight, the labrador low descends to 
the gulf of st lawrence and deepens to 29.5 inches while the 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 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 lower great lakes. this trough consolidates to a 29.8 
inch low as it passes over the lake, reaching ontario by sunday 
afternoon, with 30.1 inch ridging to follow.




lsz264-112000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
401 am edt tue aug 11 2026

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

$$

fzus63 kmqt 110801
glfls 
expires:202608112000;;985752

open lake forecast for lake superior
national weather service marquette mi
401 am 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...

this morning, lake superior is under weak 29.9 inch ridging broadly 
associated with 30.1 inch high pressure over the appalachians while 
29.6 inch low pressure is over labrador and 29.8 inch low pressure 
is over the central plains. by tonight, the labrador low descends to 
the gulf of st lawrence and deepens to 29.5 inches while the 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 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 lower great lakes. this trough consolidates to a 29.8 
inch low as it passes over the lake, reaching ontario by sunday 
afternoon, with 30.1 inch ridging to follow.




lsz265-112000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
401 am edt tue aug 11 2026

.early this morning...west winds 10 to 20 knots. waves calm to
2 feet. 
.today...west winds 5 to 15 knots backing east in the afternoon.
a slight chance of showers. waves calm to 2 feet. 
.tonight...south winds 5 to 15 knots. waves calm to 2 feet. 
.wednesday...south winds 5 to 15 knots backing north in the
afternoon, then veering northeast late. waves calm to 2 feet. 
.wednesday night...west winds 5 to 15 knots. waves calm to
2 feet. 
.thursday...northwest winds 10 to 20 knots veering north by mid
afternoon. 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 veering southeast. waves
calm to 2 feet. 
.saturday...southeast winds 10 to 20 knots. a chance of showers.
waves calm to 2 feet. 

$$

fzus63 kmqt 110801
glfls 
expires:202608112000;;985749

open lake forecast for lake superior
national weather service marquette mi
401 am 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...

this morning, lake superior is under weak 29.9 inch ridging broadly 
associated with 30.1 inch high pressure over the appalachians while 
29.6 inch low pressure is over labrador and 29.8 inch low pressure 
is over the central plains. by tonight, the labrador low descends to 
the gulf of st lawrence and deepens to 29.5 inches while the 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 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 lower great lakes. this trough consolidates to a 29.8 
inch low as it passes over the lake, reaching ontario by sunday 
afternoon, with 30.1 inch ridging to follow.




lsz162-112000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 am edt tue aug 11 2026 /301 am cdt tue aug 11 2026/

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

$$

fzus63 kmqt 110801
glfls 
expires:202608112000;;985754

open lake forecast for lake superior
national weather service marquette mi
401 am 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...

this morning, lake superior is under weak 29.9 inch ridging broadly 
associated with 30.1 inch high pressure over the appalachians while 
29.6 inch low pressure is over labrador and 29.8 inch low pressure 
is over the central plains. by tonight, the labrador low descends to 
the gulf of st lawrence and deepens to 29.5 inches while the 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 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 lower great lakes. this trough consolidates to a 29.8 
inch low as it passes over the lake, reaching ontario by sunday 
afternoon, with 30.1 inch ridging to follow.




lsz267-112000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
401 am edt tue aug 11 2026

.early this morning...south winds 5 to 15 knots. patchy fog.
waves calm to 2 feet. 
.today...southeast winds 5 to 15 knots veering south in the
afternoon, then backing north late. patchy dense fog through
early afternoon. waves calm to 2 feet. 
.tonight...west winds 5 to 15 knots becoming northwest less than
10 knots after midnight, then veering north late. waves calm to
2 feet. 
.wednesday...north winds 5 to 15 knots 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 increasing to 10 to
20 knots by mid afternoon. waves calm to 2 feet. 
.thursday night...northwest winds 10 to 20 knots veering north
after midnight. waves calm to 2 feet. 
.friday...northwest winds 5 to 15 knots backing southeast. waves
calm to 2 feet. 
.saturday...southeast winds 5 to 15 knots increasing to 10 to
20 knots. a chance of showers. waves calm to 2 feet. 

$$

fzus63 kmqt 110801
glfls 
expires:202608112000;;985753

open lake forecast for lake superior
national weather service marquette mi
401 am 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...

this morning, lake superior is under weak 29.9 inch ridging broadly 
associated with 30.1 inch high pressure over the appalachians while 
29.6 inch low pressure is over labrador and 29.8 inch low pressure 
is over the central plains. by tonight, the labrador low descends to 
the gulf of st lawrence and deepens to 29.5 inches while the 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 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 lower great lakes. this trough consolidates to a 29.8 
inch low as it passes over the lake, reaching ontario by sunday 
afternoon, with 30.1 inch ridging to follow.




lsz266-112000-
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 am edt tue aug 11 2026

.early this morning...southwest winds 5 to 15 knots. patchy fog.
waves calm to 2 feet. 
.today...west winds 5 to 15 knots backing south in the afternoon,
then backing east late. a slight chance of showers by mid
afternoon. waves calm to 2 feet. 
.tonight...south winds less than 10 knots becoming north 5 to
15 knots after midnight, then veering east late. waves calm to
2 feet. 
.wednesday...southeast 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...northwest winds 10 to 20 knots becoming north
5 to 15 knots after midnight. waves calm to 2 feet. 
.friday...north winds 5 to 15 knots veering southeast. waves calm
to 2 feet. 
.saturday...southeast winds 10 to 20 knots. a chance of showers.
waves calm to 2 feet. 

$$

fzus63 kmqt 110801
glfls 
expires:202608112000;;985750

open lake forecast for lake superior
national weather service marquette mi
401 am 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...

this morning, lake superior is under weak 29.9 inch ridging broadly 
associated with 30.1 inch high pressure over the appalachians while 
29.6 inch low pressure is over labrador and 29.8 inch low pressure 
is over the central plains. by tonight, the labrador low descends to 
the gulf of st lawrence and deepens to 29.5 inches while the 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 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 lower great lakes. this trough consolidates to a 29.8 
inch low as it passes over the lake, reaching ontario by sunday 
afternoon, with 30.1 inch ridging to follow.




lsz263-112000-
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 am edt tue aug 11 2026

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

$$