fzus61 kbuf 160802
glflo 
expires:202608161500;;278424

open lake forecast for lake ontario
national weather service buffalo ny
402 am edt sun aug 16 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 continues to exit eastward before a warm front 
drifts northeastward across lake ontario this evening and is 
followed quickly by the eastward passage of a cold front this 
evening through tonight. behind the cold front, a trough averaging 
29.8 inches should linger over lake ontario through monday. a 30.0 
inch high should build from the upper midwest monday night and 
traverse lake ontario on tuesday. the ridge should begin to exit 
eastward tuesday night before a cold front sweeps southeastward 
across lake ontario wednesday through wednesday night. behind the 
cold front, a 30.1 inch high should build from the western great 
lakes through this thursday.


loz062-161500-
lake ontario open waters from the niagara river to hamlin beach-
402 am edt sun aug 16 2026

.today...southeast winds 5 to 15 knots becoming east. waves 1 to
3 feet. 
.tonight...east winds 10 knots or less becoming west. a chance of
showers and thunderstorms in the evening, then a chance of
showers after midnight. waves 1 foot or less. 
.monday...northwest winds 5 to 10 knots becoming west. waves
2 feet or less. 
.monday night...northwest winds 5 to 10 knots. waves 2 feet or
less. 
.tuesday...west winds 10 knots or less becoming southwest 10 to
15 knots. a chance of showers and thunderstorms tuesday night.
waves 2 feet or less. 
.wednesday...west winds 10 to 15 knots becoming northwest. a
chance of showers and thunderstorms during the day, then a chance
of showers wednesday night. waves 1 to 2 feet. 
.thursday...northwest winds 5 to 10 knots. waves 1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 160802
glflo 
expires:202608161500;;278425

open lake forecast for lake ontario
national weather service buffalo ny
402 am edt sun aug 16 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 continues to exit eastward before a warm front 
drifts northeastward across lake ontario this evening and is 
followed quickly by the eastward passage of a cold front this 
evening through tonight. behind the cold front, a trough averaging 
29.8 inches should linger over lake ontario through monday. a 30.0 
inch high should build from the upper midwest monday night and 
traverse lake ontario on tuesday. the ridge should begin to exit 
eastward tuesday night before a cold front sweeps southeastward 
across lake ontario wednesday through wednesday night. behind the 
cold front, a 30.1 inch high should build from the western great 
lakes through this thursday.


loz063>065-161500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 am edt sun aug 16 2026

.today...southeast winds 5 to 15 knots. waves 1 to 3 feet
subsiding to 1 foot or less. 
.tonight...southeast winds 15 to 20 knots becoming southwest
10 to 15 knots. a chance of showers and thunderstorms through the
early overnight, then a chance of showers late. waves 1 to
3 feet. 
.monday...west winds 5 to 10 knots becoming northwest. a chance
of showers. waves 2 feet or less. 
.monday night...west winds 10 knots or less becoming north. waves
2 feet or less. 
.tuesday...northwest winds 10 knots or less becoming southwest
10 to 15 knots. a chance of showers tuesday night. waves 2 feet
or less. 
.wednesday...west winds 5 to 15 knots becoming northwest. showers
likely with a chance of thunderstorms during the day, then a
chance of showers and thunderstorms wednesday night. waves 1 to
2 feet. 
.thursday...northwest winds 5 to 10 knots becoming west. waves
2 feet or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 160745
glfle 
expires:202608161415;;277870

open lake forecast for lake erie
national weather service cleveland oh
345 am edt sun aug 16 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 warm front will lift northeast away from lake erie this morning
with a cold front moving east across the lake late tonight into
early monday morning. high pressure 30.00 inches will build into
the region monday through tuesday before the next cold front
pushes southeast across the region wednesday. high pressure 30.00
inches will build across the great lakes thursday.


lez162>164-161415-
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-
345 am edt sun aug 16 2026

.today...southwest winds 5 to 10 knots becoming west. a chance of
showers with a slight chance of thunderstorms this morning, then
showers with a chance of thunderstorms this afternoon. some
thunderstorms may produce heavy rainfall from late morning on.
waves 2 feet or less. 
.tonight...west winds 10 to 15 knots becoming northwest. a chance
of showers and thunderstorms early, then a slight chance of
showers and thunderstorms late in the evening. some thunderstorms
may produce heavy rainfall early. waves 1 to 2 feet. 
.monday...north winds 5 to 15 knots becoming northwest. waves
2 feet or less. 
.monday night...northwest winds 10 knots or less becoming west.
waves 1 foot or less. 
.tuesday...west winds 5 to 15 knots. a chance of showers and
thunderstorms tuesday night. waves 2 feet or less. 
.wednesday...west winds 5 to 15 knots becoming northeast. a
chance of showers and thunderstorms during the day, then a chance
of showers wednesday night. waves 1 to 2 feet. 
.thursday...north winds 5 to 10 knots becoming southeast. waves
2 feet or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 160745
glfle 
expires:202608161415;;277871

open lake forecast for lake erie
national weather service cleveland oh
345 am edt sun aug 16 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 warm front will lift northeast away from lake erie this morning
with a cold front moving east across the lake late tonight into
early monday morning. high pressure 30.00 inches will build into
the region monday through tuesday before the next cold front
pushes southeast across the region wednesday. high pressure 30.00
inches will build across the great lakes thursday.


lez165>167-161415-
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-
345 am edt sun aug 16 2026

.today...south winds 10 to 15 knots becoming west. a slight
chance of showers this morning, then a chance of showers and
thunderstorms this afternoon. some thunderstorms may produce
heavy rainfall early this afternoon. waves 1 to 2 feet. 
.tonight...west winds 10 to 15 knots becoming northwest. a chance
of showers and thunderstorms in the evening, then a chance of
showers after midnight. waves 2 to 3 feet. 
.monday...north winds 5 to 15 knots becoming northwest. waves
1 to 3 feet. 
.monday night...northwest winds 5 to 15 knots becoming west less
than 10 knots. waves 2 feet or less. 
.tuesday...west winds 5 to 15 knots. a chance of showers and
thunderstorms tuesday night. waves 1 to 3 feet. 
.wednesday...west winds 5 to 15 knots becoming north. a chance of
showers and thunderstorms during the day, then a chance of
showers wednesday night. waves 1 to 3 feet. 
.thursday...north winds 5 to 10 knots becoming east. waves 1 to
3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 160745
glfle 
expires:202608161415;;277872

open lake forecast for lake erie
national weather service cleveland oh
345 am edt sun aug 16 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 warm front will lift northeast away from lake erie this morning
with a cold front moving east across the lake late tonight into
early monday morning. high pressure 30.00 inches will build into
the region monday through tuesday before the next cold front
pushes southeast across the region wednesday. high pressure 30.00
inches will build across the great lakes thursday.


lez061-168-169-161415-
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-
345 am edt sun aug 16 2026

.today...southeast winds 5 to 10 knots becoming southwest. a
slight chance of showers late this morning. a chance of showers
and thunderstorms this afternoon. waves 2 feet or less. 
.tonight...southwest winds 10 to 15 knots becoming northwest. a
chance of showers and thunderstorms in the evening, then a chance
of showers after midnight. waves 1 to 3 feet. 
.monday...northwest winds 5 to 15 knots becoming west. waves 1 to
3 feet. 
.monday night...west winds 5 to 15 knots becoming northwest less
than 10 knots. waves 2 feet or less. 
.tuesday...west winds 10 knots or less becoming southwest 10 to
15 knots. showers likely with a chance of thunderstorms tuesday
night. waves 1 to 3 feet. 
.wednesday...west winds 5 to 15 knots becoming north. showers
likely with a chance of thunderstorms during the day. waves 1 to
3 feet. 
.thursday...north winds 5 to 10 knots becoming northeast. waves
2 feet or less. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 160740
glfsc 
expires:202608161545;;277744

lake st clair forecast
national weather service detroit/pontiac mi
340 am edt sun aug 16 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 of 30.20 inches moves over the northeast
through today as low pressure of 29.6 inches moves east across
ontario. as the low tracks east, it will push a cold front across
the central great lakes region late this evening. this cold front
brings in a 6-8 hour bout of 20-25 knot northwest winds tonight
into early monday morning and chances for thunderstorms this
afternoon and evening.


lcz460-161545-
lake st clair-
340 am edt sun aug 16 2026

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

$$

fzus63 kdtx 160739
glflh 
expires:202608161545;;277739

open lake forecast for lake huron
national weather service detroit/pontiac mi
339 am edt sun aug 16 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 of 30.20 inches moves over the northeast
through today as low pressure of 29.6 inches moves east across
ontario. as the low tracks east, it will push a cold front across
the central great lakes region late this evening. this cold front
brings in a 6-8 hour bout of 20-25 knot northwest winds tonight
into early monday morning and chances for thunderstorms this
afternoon and evening.


lhz361-161545-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
339 am edt sun aug 16 2026

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


$$

fzus63 kdtx 160739
glflh 
expires:202608161545;;277741

open lake forecast for lake huron
national weather service detroit/pontiac mi
339 am edt sun aug 16 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 of 30.20 inches moves over the northeast
through today as low pressure of 29.6 inches moves east across
ontario. as the low tracks east, it will push a cold front across
the central great lakes region late this evening. this cold front
brings in a 6-8 hour bout of 20-25 knot northwest winds tonight
into early monday morning and chances for thunderstorms this
afternoon and evening.


lhz462>464-161545-
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-
339 am edt sun aug 16 2026

.today...southeast winds 10 to 15 knots becoming south 5 to
10 knots in the afternoon. a chance of showers in the afternoon.
waves 1 to 3 feet. 
.tonight...north winds 5 to 10 knots becoming northwest 10 to
15 knots late in the evening...then increasing to 15 to 20 knots
after midnight. a chance of showers. waves 1 to 3 feet building
to 4 to 6 feet after midnight. waves occasionally around 8 feet. 
.monday...northwest winds 10 to 15 knots. waves 3 to 5 feet. 
.monday night...light and variable winds. waves 1 to 3 feet. 
.tuesday...southwest winds 5 to 10 knots becoming south 10 to
15 knots late in the afternoon...then veering to the west late in
the evening. showers likely and a chance of thunderstorms late in
the afternoon. rain showers likely late in the evening. waves
1 to 3 feet. 
.wednesday...northwest winds 10 to 15 knots. showers likely early
in the morning. waves 1 to 3 feet. 
.thursday...northwest winds 5 to 10 knots veering to the
northeast by midnight. waves 2 feet or less. 


$$

fzus63 kdtx 160739
glflh 
expires:202608161545;;277740

open lake forecast for lake huron
national weather service detroit/pontiac mi
339 am edt sun aug 16 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 of 30.20 inches moves over the northeast
through today as low pressure of 29.6 inches moves east across
ontario. as the low tracks east, it will push a cold front across
the central great lakes region late this evening. this cold front
brings in a 6-8 hour bout of 20-25 knot northwest winds tonight
into early monday morning and chances for thunderstorms this
afternoon and evening.


lhz362-363-161545-
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-
339 am edt sun aug 16 2026

.today...southeast winds 10 to 15 knots becoming south 5 to
10 knots in the afternoon. a chance of showers in the afternoon.
waves 2 to 4 feet subsiding to 1 to 3 feet in the afternoon. 
.tonight...west winds 5 to 10 knots becoming northwest 15 to
20 knots in the late evening and overnight. a chance of showers
in the evening. waves 2 to 4 feet building to 4 to 6 feet in the
late evening and overnight. waves occasionally around 8 feet. 
.monday...northwest winds 10 to 15 knots becoming north 5 to
10 knots in the late morning and afternoon. waves 3 to 5 feet
subsiding to 2 to 4 feet early in the afternoon. 
.monday night...light and variable winds becoming southwest 5 to
10 knots after midnight. waves 2 feet or less. 
.tuesday...southwest winds 5 to 10 knots increasing to 10 to
15 knots late in the morning...then veering to the northwest late
in the evening. a chance of showers. a chance of thunderstorms
late in the afternoon. waves 1 to 3 feet building to 2 to 4 feet
late in the evening. 
.wednesday...northwest winds 10 to 15 knots decreasing to 5 to
10 knots. a chance of showers early in the morning. waves 2 to
4 feet subsiding to 1 to 3 feet in the late morning and early
afternoon...then building to 2 to 4 feet . 
.thursday...northwest winds 5 to 10 knots veering to the east by
midnight. waves 2 feet or less. 


$$

fzus63 kmkx 160802
glflm 
expires:202608161545;;278393

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
302 am cdt sun aug 16 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...

low pressure around 29.9 inches over ontario will move northeast 
toward james bay through this morning dragging a cold front across
lake michigan through the day. southeast winds ahead of the front
will turn to northwesterly and become breezy behind the frontal 
passage. then high pressure around 30.1 inches will build across 
the region from the plains later tonight into monday. this will 
bring light and variable winds over the lake through monday. as 
the high pressure moves out, expect southwesterly winds to 
increase over lake michigan later monday into tuesday as a low 
pressure around 29.5 inches develops and meanders over the hudson 
bay region tuesday. this is expected to drag a slow moving cold 
front across the upper great lakes later tuesday into early 
wednesday and bring thunderstorm chances back to the region. the 
front is progged to push through by wednesday with high pressure 
building back into the region for the second half of the week 
along with light and variable winds.



lmz080-669-671-673-675-777-779-870-872-874-876-878-161545-
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-
302 am cdt sun aug 16 2026

sheboygan wi to pentwater mi south...

.today...southwest winds 10 to 15 kt becoming northwest 10 to
20 kt. slight chance of showers and thunderstorms. waves 1 to
2 ft. 
.tonight...northwest winds 10 to 20 kt becoming north. waves 2 to
4 ft. 
.monday...north winds 10 to 15 kt backing to west 10 to 20 kt.
waves 2 to 4 ft subsiding to 1 to 2 ft. 
.monday night...southwest winds 10 to 20 kt. waves 1 to 3 ft
building to 2 to 4 ft. 
.tuesday...southwest winds 10 to 20 kt. waves 2 to 4 ft. 
.tuesday night...southwest winds 10 to 20 kt becoming northwest.
chance of showers and thunderstorms. waves 2 to 4 ft. 
.wednesday...north winds 10 to 20 kt increasing to 30 kt. chance
of showers. waves 2 to 4 ft. 
.thursday...southwest winds 5 to 10 kt becoming south 10 to
15 kt. waves 1 to 2 ft.  

$$

fzus63 kmkx 160802
glflm 
expires:202608161545;;278392

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
302 am cdt sun aug 16 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...

low pressure around 29.9 inches over ontario will move northeast 
toward james bay through this morning dragging a cold front across
lake michigan through the day. southeast winds ahead of the front
will turn to northwesterly and become breezy behind the frontal 
passage. then high pressure around 30.1 inches will build across 
the region from the plains later tonight into monday. this will 
bring light and variable winds over the lake through monday. as 
the high pressure moves out, expect southwesterly winds to 
increase over lake michigan later monday into tuesday as a low 
pressure around 29.5 inches develops and meanders over the hudson 
bay region tuesday. this is expected to drag a slow moving cold 
front across the upper great lakes later tuesday into early 
wednesday and bring thunderstorm chances back to the region. the 
front is progged to push through by wednesday with high pressure 
building back into the region for the second half of the week 
along with light and variable winds.



lmz261-362-364-366-563-565-567-868-161545-
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-
302 am cdt sun aug 16 2026

sheboygan wi to pentwater mi north...

.today...southwest winds 10 to 15 kt increasing to 10 to 20 kt
late this morning, then becoming west early this afternoon
becoming north 15 to 25 kt late. chance of showers and slight
chance of thunderstorms this morning, then slight chance of
showers this afternoon. waves 1 to 2 ft building to 2 to 4 ft. 
.tonight...north winds 15 to 25 kt becoming northwest 10 to
15 kt. waves 2 to 4 ft subsiding to 1 to 3 ft. 
.monday...northwest winds 10 to 15 kt backing to southwest 10 to
20 kt. waves 1 to 3 ft. 
.monday night...south winds 10 to 20 kt becoming southwest. waves
2 to 4 ft. 
.tuesday...southwest winds 15 to 25 kt. waves 2 to 4 ft. 
.tuesday night...northwest winds 10 to 20 kt becoming north.
waves 2 to 4 ft. 
.wednesday...north winds 10 to 20 kt increasing to 15 to 25 kt.
waves 1 to 3 ft. 
.thursday...west winds 5 to 10 kt becoming southwest 10 to 20 kt.
waves 1 ft or less.  

$$

fzus63 kmqt 160801
glfls 
expires:202608162000;;278354

open lake forecast for lake superior
national weather service marquette mi
401 am edt sun aug 16 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, a 29.9 inch trough is over the lake associated with a 
29.8 inch low over far northern ontario. by tonight, the low will 
deepen to 29.7 inches as 30.0 inch high pressure expands over the 
northern plains. by monday afternoon, the high will build to 30.1 
inches over iowa as the low deepens to 29.6 inches over northeast 
quebec. meanwhile, a 29.5 inch low develops over western hudson bay. 
by tuesday morning, the low will expand across much of hudson bay 
while the hgih weakens to 30.0 inches and sags south of the great 
lakes. as the low reaches northwest quebec at 29.6 inches tuesday 
night, another 30.0 inch high settles over north dakota. this high 
moves over lake superior wednesday evening, expanding to cover much 
of the great lakes by thursday evening. friday into the weekend, a 
low pressure of around 29.87 inches will transit across northern 
ontario.




lsz162-162000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 am edt sun aug 16 2026 /301 am cdt sun aug 16 2026/

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

$$

fzus63 kmqt 160801
glfls 
expires:202608162000;;278355

open lake forecast for lake superior
national weather service marquette mi
401 am edt sun aug 16 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, a 29.9 inch trough is over the lake associated with a 
29.8 inch low over far northern ontario. by tonight, the low will 
deepen to 29.7 inches as 30.0 inch high pressure expands over the 
northern plains. by monday afternoon, the high will build to 30.1 
inches over iowa as the low deepens to 29.6 inches over northeast 
quebec. meanwhile, a 29.5 inch low develops over western hudson bay. 
by tuesday morning, the low will expand across much of hudson bay 
while the hgih weakens to 30.0 inches and sags south of the great 
lakes. as the low reaches northwest quebec at 29.6 inches tuesday 
night, another 30.0 inch high settles over north dakota. this high 
moves over lake superior wednesday evening, expanding to cover much 
of the great lakes by thursday evening. friday into the weekend, a 
low pressure of around 29.87 inches will transit across northern 
ontario.




lsz263-162000-
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 sun aug 16 2026

.early this morning...west winds 5 to 15 knots. a slight chance
of showers. waves calm to 2 feet. 
.today...west winds 10 to 20 knots. a slight chance of showers
through early afternoon. waves building to 1 to 3 feet, then
subsiding to calm to 2 feet. 
.tonight...northwest winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. waves calm to 2 feet. 
.monday...west winds 5 to 15 knots becoming southwest 15 to
25 knots in the afternoon. a chance of showers by mid afternoon.
waves building to 2 to 4 feet. 
.monday night...southwest winds 15 to 25 knots becoming west
10 to 20 knots after midnight. a slight chance of thunderstorms
through midnight. a chance of showers. waves subsiding to calm to
2 feet. 
.tuesday...west winds 10 to 20 knots. waves calm to 2 feet. 
.tuesday night...west winds 10 to 20 knots becoming northwest
5 to 15 knots after midnight. waves calm to 2 feet. 
.wednesday...southwest winds 5 to 15 knots. waves calm to 2 feet.
.thursday...southwest winds 10 to 20 knots becoming south 15 to
25 knots. a chance of showers. waves building to 1 to 3 feet. 

$$

fzus63 kmqt 160801
glfls 
expires:202608162000;;278356

open lake forecast for lake superior
national weather service marquette mi
401 am edt sun aug 16 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, a 29.9 inch trough is over the lake associated with a 
29.8 inch low over far northern ontario. by tonight, the low will 
deepen to 29.7 inches as 30.0 inch high pressure expands over the 
northern plains. by monday afternoon, the high will build to 30.1 
inches over iowa as the low deepens to 29.6 inches over northeast 
quebec. meanwhile, a 29.5 inch low develops over western hudson bay. 
by tuesday morning, the low will expand across much of hudson bay 
while the hgih weakens to 30.0 inches and sags south of the great 
lakes. as the low reaches northwest quebec at 29.6 inches tuesday 
night, another 30.0 inch high settles over north dakota. this high 
moves over lake superior wednesday evening, expanding to cover much 
of the great lakes by thursday evening. friday into the weekend, a 
low pressure of around 29.87 inches will transit across northern 
ontario.




lsz264-162000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
401 am edt sun aug 16 2026

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

$$

fzus63 kmqt 160801
glfls 
expires:202608162000;;278357

open lake forecast for lake superior
national weather service marquette mi
401 am edt sun aug 16 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, a 29.9 inch trough is over the lake associated with a 
29.8 inch low over far northern ontario. by tonight, the low will 
deepen to 29.7 inches as 30.0 inch high pressure expands over the 
northern plains. by monday afternoon, the high will build to 30.1 
inches over iowa as the low deepens to 29.6 inches over northeast 
quebec. meanwhile, a 29.5 inch low develops over western hudson bay. 
by tuesday morning, the low will expand across much of hudson bay 
while the hgih weakens to 30.0 inches and sags south of the great 
lakes. as the low reaches northwest quebec at 29.6 inches tuesday 
night, another 30.0 inch high settles over north dakota. this high 
moves over lake superior wednesday evening, expanding to cover much 
of the great lakes by thursday evening. friday into the weekend, a 
low pressure of around 29.87 inches will transit across northern 
ontario.




lsz265-162000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
401 am edt sun aug 16 2026

.early this morning...southwest winds 10 to 20 knots. showers
likely and a slight chance of thunderstorms. waves calm to
2 feet. 
.today...west winds 15 to 25 knots becoming northwest 20 to
30 knots in the afternoon. a slight chance of showers through
early afternoon. waves building to 2 to 4 feet, then subsiding to
1 to 3 feet. 
.tonight...northwest winds 10 to 20 knots backing west late.
waves subsiding to calm to 2 feet. 
.monday...west winds 10 to 20 knots diminishing to 5 to 15 knots
late. waves calm to 2 feet. 
.monday night...south winds 10 to 20 knots becoming west 15 to
25 knots after midnight. a chance of showers. waves calm to
2 feet. 
.tuesday...west winds 15 to 25 knots veering northwest by mid
afternoon. waves building to 1 to 3 feet, then subsiding to calm
to 2 feet. 
.tuesday night...west winds 10 to 20 knots. waves calm to 2 feet.
.wednesday...northwest winds 10 to 20 knots becoming west 5 to
15 knots. waves calm to 2 feet. 
.thursday...southeast winds 5 to 15 knots becoming south 10 to
20 knots. waves building to 1 to 3 feet. 

$$

fzus63 kmqt 160801
glfls 
expires:202608162000;;278358

open lake forecast for lake superior
national weather service marquette mi
401 am edt sun aug 16 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, a 29.9 inch trough is over the lake associated with a 
29.8 inch low over far northern ontario. by tonight, the low will 
deepen to 29.7 inches as 30.0 inch high pressure expands over the 
northern plains. by monday afternoon, the high will build to 30.1 
inches over iowa as the low deepens to 29.6 inches over northeast 
quebec. meanwhile, a 29.5 inch low develops over western hudson bay. 
by tuesday morning, the low will expand across much of hudson bay 
while the hgih weakens to 30.0 inches and sags south of the great 
lakes. as the low reaches northwest quebec at 29.6 inches tuesday 
night, another 30.0 inch high settles over north dakota. this high 
moves over lake superior wednesday evening, expanding to cover much 
of the great lakes by thursday evening. friday into the weekend, a 
low pressure of around 29.87 inches will transit across northern 
ontario.




lsz266-162000-
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 sun aug 16 2026

.early this morning...southwest winds 10 to 20 knots. showers
likely and a chance of thunderstorms. waves 1 to 3 feet subsiding
to calm to 2 feet. 
.today...northwest winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon, then diminishing to 15 to 25 knots
late. a chance of showers through early afternoon. waves building
to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to
4 feet. 
.tonight...northwest winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. waves subsiding to calm to 2 feet. 
.monday...northwest winds 5 to 15 knots backing southwest late.
waves calm to 2 feet. 
.monday night...south winds 5 to 15 knots becoming southwest
15 to 25 knots after midnight. a chance of showers. waves calm to
2 feet. 
.tuesday...west winds 15 to 25 knots. waves building to 1 to
3 feet, then subsiding to calm to 2 feet. 
.tuesday night...west winds 10 to 20 knots veering northwest
after midnight. waves calm to 2 feet. 
.wednesday...northwest winds 5 to 15 knots backing west. waves
calm to 2 feet. 
.thursday...west winds 5 to 15 knots becoming south 15 to
25 knots. waves building to 1 to 3 feet. 

$$

fzus63 kmqt 160801
glfls 
expires:202608162000;;278359

open lake forecast for lake superior
national weather service marquette mi
401 am edt sun aug 16 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, a 29.9 inch trough is over the lake associated with a 
29.8 inch low over far northern ontario. by tonight, the low will 
deepen to 29.7 inches as 30.0 inch high pressure expands over the 
northern plains. by monday afternoon, the high will build to 30.1 
inches over iowa as the low deepens to 29.6 inches over northeast 
quebec. meanwhile, a 29.5 inch low develops over western hudson bay. 
by tuesday morning, the low will expand across much of hudson bay 
while the hgih weakens to 30.0 inches and sags south of the great 
lakes. as the low reaches northwest quebec at 29.6 inches tuesday 
night, another 30.0 inch high settles over north dakota. this high 
moves over lake superior wednesday evening, expanding to cover much 
of the great lakes by thursday evening. friday into the weekend, a 
low pressure of around 29.87 inches will transit across northern 
ontario.




lsz267-162000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
401 am edt sun aug 16 2026

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

$$