fzus61 kbuf 170202
glflo 
expires:202608170900;;321588

open lake forecast for lake ontario
national weather service buffalo ny
1002 pm 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 29.7 inch low will move across james bay through this evening. 
behind a cold front, a trough averaging 29.8 inches should linger 
over lake ontario through monday. a 30.0 inch high will build from 
the upper midwest monday night and traverse lake ontario tuesday. 
the ridge will begin to exit east tuesday night before a cold front 
sweeps southeastward across the lake wednesday through wednesday 
night. a 30.1 inch high will build across the great lakes thursday 
through friday.


loz063>065-170900-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 pm edt sun aug 16 2026

.overnight...south winds 15 to 20 knots becoming southwest.
a chance of showers. waves 2 to 4 feet subsiding to 2 feet or
less. 
.monday...west winds 10 to 15 knots becoming northwest. a chance
of showers early. a chance of showers in the afternoon. waves
2 feet or less. 
.monday night...northwest winds 10 knots or less becoming north.
waves 2 feet or less. 
.tuesday...north winds 10 knots or less becoming west. waves
1 foot or less. 
.tuesday night...southwest winds 5 to 15 knots. a chance of
showers overnight. waves 2 feet or less. 
.wednesday...west winds 5 to 15 knots becoming northwest. showers
likely during the day. waves 1 to 3 feet. 
.thursday...northwest winds 5 to 10 knots. waves 1 foot or less. 
.friday...southwest winds 10 knots or less becoming south. waves
1 foot or less. 

$$

fzus61 kbuf 170202
glflo 
expires:202608170900;;321587

open lake forecast for lake ontario
national weather service buffalo ny
1002 pm 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 29.7 inch low will move across james bay through this evening. 
behind a cold front, a trough averaging 29.8 inches should linger 
over lake ontario through monday. a 30.0 inch high will build from 
the upper midwest monday night and traverse lake ontario tuesday. 
the ridge will begin to exit east tuesday night before a cold front 
sweeps southeastward across the lake wednesday through wednesday 
night. a 30.1 inch high will build across the great lakes thursday 
through friday.


loz062-170900-
lake ontario open waters from the niagara river to hamlin beach-
1002 pm edt sun aug 16 2026

.overnight...west winds 10 knots or less. waves 1 to
2 feet. 
.monday...northwest winds 5 to 15 knots becoming west. waves
2 feet or less. 
.monday night...west winds 5 to 10 knots becoming northwest.
waves 2 feet or less. 
.tuesday...northwest winds 10 knots or less becoming southwest.
waves 1 foot or less. 
.tuesday night...southwest winds 10 to 15 knots becoming west. a
chance of showers overnight. waves 2 feet or less. 
.wednesday...west winds 5 to 15 knots becoming northwest. a
chance of showers during the day. waves 1 to 2 feet. 
.thursday...northwest winds 5 to 10 knots. waves 1 foot or less. 
.friday...north winds 10 knots or less becoming south. waves
1 foot or less. 

$$

fzus61 kcle 170146
glfle 
expires:202608170815;;321312

open lake forecast for lake erie
national weather service cleveland oh
946 pm 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 cold front will cross the lake tonight. high pressure 30.00 
inches will build from the north on monday and move south of the
lake on tuesday. a cold front will cross the lake on wednesday.
high pressure 30.20 inches will build back over the lake on
thursday and friday.


lez162>164-170815-
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-
946 pm edt sun aug 16 2026

.rest of tonight...west winds 10 to 15 knots becoming northwest
15 to 20 knots. a slight chance of showers and thunderstorms late
this evening. 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
southwest. waves 1 foot or less. 
.tuesday...west winds 5 to 10 knots becoming southwest. waves
1 foot or less. 
.tuesday night...southwest winds 10 to 15 knots becoming west. a
chance of showers overnight. waves 1 to 2 feet. 
.wednesday...west winds 5 to 10 knots becoming northeast. showers
likely with a chance of thunderstorms during the day. waves
2 feet or less. 
.thursday...northeast winds 5 to 10 knots becoming east. waves
1 foot or less. 
.friday...east winds 5 to 10 knots becoming south. waves 1 foot
or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 170146
glfle 
expires:202608170815;;321313

open lake forecast for lake erie
national weather service cleveland oh
946 pm 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 cold front will cross the lake tonight. high pressure 30.00 
inches will build from the north on monday and move south of the
lake on tuesday. a cold front will cross the lake on wednesday.
high pressure 30.20 inches will build back over the lake on
thursday and friday.


lez165>167-170815-
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-
946 pm edt sun aug 16 2026

.rest of tonight...west winds 10 to 15 knots becoming northwest
15 to 20 knots. a chance of showers and thunderstorms. waves 1 to
3 feet. 
.monday...north winds 15 to 20 knots becoming northwest 5 to
15 knots. waves 1 to 3 feet. 
.monday night...northwest winds 5 to 15 knots diminishing to less
than 10 knots. waves 2 feet or less. 
.tuesday...west winds 5 to 15 knots. waves 2 feet or less. 
.tuesday night...southwest winds 10 to 15 knots becoming west. a
chance of showers overnight. waves 1 to 3 feet. 
.wednesday...northwest winds 5 to 15 knots becoming northeast. a
chance of showers. waves 1 to 3 feet. 
.thursday...northeast winds 5 to 10 knots. waves 1 foot or less. 
.friday...east winds 10 knots or less becoming south. waves
1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 170146
glfle 
expires:202608170815;;321314

open lake forecast for lake erie
national weather service cleveland oh
946 pm 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 cold front will cross the lake tonight. high pressure 30.00 
inches will build from the north on monday and move south of the
lake on tuesday. a cold front will cross the lake on wednesday.
high pressure 30.20 inches will build back over the lake on
thursday and friday.


lez061-168-169-170815-
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-
946 pm edt sun aug 16 2026

.rest of tonight...west winds 10 to 15 knots becoming northwest.
a chance of showers and thunderstorms, then a chance of showers
with a slight chance of thunderstorms late. waves 1 to 3 feet. 
.monday...northwest winds 15 to 20 knots becoming west 5 to
15 knots. waves 1 to 3 feet. 
.monday night...west winds 5 to 15 knots becoming north less than
10 knots. waves 2 feet or less. 
.tuesday...northwest winds 10 knots or less becoming west. waves
2 feet or less. 
.tuesday night...southwest winds 10 to 15 knots becoming west.
showers likely overnight. waves 1 to 3 feet. 
.wednesday...northwest winds 5 to 15 knots becoming north.
showers likely during the day. waves 1 to 3 feet subsiding to
1 foot or less. 
.thursday...northeast winds 5 to 10 knots. waves 1 foot or less. 
.friday...east winds 10 knots or less becoming south. waves
1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 170207
glfsc 
expires:202608171015;;321842

lake st clair forecast
national weather service detroit/pontiac mi
1007 pm 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...an area of low pressure, 29.80 inches, is tracking
east across ontario this afternoon and will pull 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. high pressure, 30.20
inches, builds in behind the front for monday and most of
tuesday.


lcz460-171015-
lake st clair-
1007 pm edt sun aug 16 2026

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

$$

fzus63 kdtx 170203
glflh 
expires:202608171015;;321669

open lake forecast for lake huron
national weather service detroit/pontiac mi
1003 pm 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...an area of low pressure, 29.80 inches, is tracking
east across ontario this afternoon and will pull 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. high pressure, 30.20
inches, builds in behind the front for monday and most of
tuesday.


lhz462>464-171015-
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-
1003 pm edt sun aug 16 2026

.rest of tonight...north winds 10 to 15 knots becoming northwest
15 to 20 knots after midnight. a chance of showers this evening.
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 becoming north 5 to
10 knots late in the afternoon. waves 3 to 5 feet. 
.monday night...light and variable winds. waves 2 feet or less. 
.tuesday...south winds 5 to 10 knots. waves 2 feet or less. 
.tuesday night...south winds 5 to 10 knots becoming west 10 to
15 knots in the late evening and overnight. showers likely. waves
1 to 3 feet. 
.wednesday...north winds 5 to 10 knots. a chance of showers.
waves 2 feet or less. 
.thursday...north winds 5 to 10 knots. waves 2 feet or less. 
.friday...south winds 5 to 10 knots increasing to 10 to 15 knots
by midnight. waves 2 feet or less. 


$$

fzus63 kdtx 170203
glflh 
expires:202608171015;;321668

open lake forecast for lake huron
national weather service detroit/pontiac mi
1003 pm 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...an area of low pressure, 29.80 inches, is tracking
east across ontario this afternoon and will pull 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. high pressure, 30.20
inches, builds in behind the front for monday and most of
tuesday.


lhz362-363-171015-
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-
1003 pm edt sun aug 16 2026

.rest of tonight...northwest winds 15 to 20 knots. waves 5 to
7 feet. waves occasionally around 10 feet. 
.monday...northwest winds 10 to 15 knots decreasing to 5 to
10 knots in the late morning and afternoon. waves 3 to 5 feet
subsiding to 1 to 3 feet late 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 in the late morning and afternoon. a chance of showers
and thunderstorms in the afternoon. waves 1 to 3 feet. 
.tuesday night...south winds 10 to 15 knots veering to the
northwest in the late evening and overnight. a chance of showers
and thunderstorms in the evening...then a chance of showers after
midnight. waves 2 to 4 feet. 
.wednesday...northwest winds 5 to 10 knots veering to the north
late in the afternoon. waves 1 to 3 feet. 
.thursday...north winds 5 to 10 knots veering to the east by
midnight. waves 2 feet or less. 
.friday...southwest winds 5 to 10 knots becoming south 10 to
15 knots . a chance of showers by midnight. waves 2 feet or less.


$$

fzus63 kdtx 170203
glflh 
expires:202608171015;;321667

open lake forecast for lake huron
national weather service detroit/pontiac mi
1003 pm 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...an area of low pressure, 29.80 inches, is tracking
east across ontario this afternoon and will pull 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. high pressure, 30.20
inches, builds in behind the front for monday and most of
tuesday.


lhz361-171015-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
1003 pm edt sun aug 16 2026

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


$$

fzus63 kmkx 170158
glflm 
expires:202608170915;;321454

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
858 pm 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...

an area of 30.1 inch high pressure will build in from the 
northern great plains late tonight into monday, bringing light and
variable winds to the waters through the majority of monday and 
monday night. a slow-moving cold front will approach from the 
northern great plains tuesday into wednesday, bringing increasing 
southwest winds and chances for thunderstorms. tuesday evening and
night appears most favored for storm potential, with storm 
chances expected to move well south of the waters on wednesday. 
30.0 inch high pressure will move through the western great lakes 
wednesday through thursday, with light and variable winds 
prevailing across the waters. the next thunderstorm chances arrive
friday afternoon and evening, when the next cold front is 
expected to move across lake michigan.


lmz080-669-671-673-675-777-779-870-872-874-876-878-170915-
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 sun aug 16 2026

sheboygan wi to pentwater mi south...

.rest of tonight...northwest winds 10 to 20 kt becoming
northeast. waves 2 to 4 ft. 
.monday...north winds 10 to 20 kt diminishing to 10 to 15 kt.
waves 2 to 4 ft subsiding to 1 to 2 ft. 
.monday night...southwest winds 10 to 15 kt increasing to 10 to
20 kt. waves 1 to 3 ft. 
.tuesday...southwest winds 10 to 20 kt. waves 2 to 4 ft. 
.tuesday night...west winds 10 to 20 kt veering to north. chance
of showers. waves 2 to 4 ft. 
.wednesday...northeast winds 10 to 15 kt becoming north 10 to
20 kt. chance of showers in the morning. waves 1 to 3 ft. 
.wednesday night...northeast winds 10 to 15 kt diminishing to
5 to 10 kt. waves 1 to 2 ft. 
.thursday...northeast winds 5 to 10 kt increasing to 10 to 15 kt.
waves 1 to 2 ft. 
.friday...south winds 10 to 20 kt increasing to 15 to 25 kt.
waves 2 to 4 ft.  

$$

fzus63 kmkx 170158
glflm 
expires:202608170915;;321453

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
858 pm 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...

an area of 30.1 inch high pressure will build in from the 
northern great plains late tonight into monday, bringing light and
variable winds to the waters through the majority of monday and 
monday night. a slow-moving cold front will approach from the 
northern great plains tuesday into wednesday, bringing increasing 
southwest winds and chances for thunderstorms. tuesday evening and
night appears most favored for storm potential, with storm 
chances expected to move well south of the waters on wednesday. 
30.0 inch high pressure will move through the western great lakes 
wednesday through thursday, with light and variable winds 
prevailing across the waters. the next thunderstorm chances arrive
friday afternoon and evening, when the next cold front is 
expected to move across lake michigan.


lmz261-362-364-366-563-565-567-868-170915-
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 sun aug 16 2026

sheboygan wi to pentwater mi north...

.rest of tonight...north winds 15 to 25 kt diminishing to 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 2 ft. 
.monday night...southwest winds 10 to 20 kt. waves 1 to 3 ft. 
.tuesday...west winds 15 to 25 kt. chance of showers in the
afternoon. waves 2 to 4 ft. 
.tuesday night...north winds 10 to 20 kt. chance of showers in
the evening. waves 2 to 4 ft. 
.wednesday...northwest winds 10 to 15 kt increasing to 10 to
20 kt. waves 1 to 2 ft. 
.wednesday night...northeast winds 10 to 20 kt diminishing to
5 to 10 kt. waves 1 to 2 ft. 
.thursday...east winds 5 to 10 kt veering to west 10 to 20 kt.
waves 1 ft or less. 
.friday...southwest winds 15 to 25 kt increasing to 30 kt. waves
2 to 4 ft.  

$$

fzus63 kmqt 170201
glfls 
expires:202608170800;;321553

open lake forecast for lake superior
national weather service marquette mi
1001 pm 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...

a 30.1 inch high pressure expands over the midwest tonight, 
extending a 30.0 inch ridge over lake superior. this high weakens to 
30.0 inches on monday and shifts south as a 29.8 inch trough, 
associated with a 29.6 inch low over the hudson bay, builds over 
lake superior. troughing lingers until tuesday afternoon when weak 
29.9 inch ridging returns to lake superior. 30.0 inch high pressure 
settles over the northern plains tuesday afternoon and night, 
eventually moving over lake superior wednesday evening before 
expanding to cover much of the great lakes by thursday afternoon. 
friday into the weekend, a low pressure of around 29.8 inches 
transits across northern ontario.




lsz162-170800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 pm edt sun aug 16 2026 /901 pm cdt sun aug 16 2026/

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

$$

fzus63 kmqt 170201
glfls 
expires:202608170800;;321554

open lake forecast for lake superior
national weather service marquette mi
1001 pm 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...

a 30.1 inch high pressure expands over the midwest tonight, 
extending a 30.0 inch ridge over lake superior. this high weakens to 
30.0 inches on monday and shifts south as a 29.8 inch trough, 
associated with a 29.6 inch low over the hudson bay, builds over 
lake superior. troughing lingers until tuesday afternoon when weak 
29.9 inch ridging returns to lake superior. 30.0 inch high pressure 
settles over the northern plains tuesday afternoon and night, 
eventually moving over lake superior wednesday evening before 
expanding to cover much of the great lakes by thursday afternoon. 
friday into the weekend, a low pressure of around 29.8 inches 
transits across northern ontario.




lsz263-170800-
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 sun aug 16 2026

.rest of tonight...northwest winds 5 to 15 knots backing west
late. waves calm to 2 feet. 
.monday...west winds 5 to 15 knots becoming southwest 15 to
25 knots in the afternoon. waves building to 2 to 4 feet. 
.monday night...southwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight, then veering west late. 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 building to 1 to
3 feet. 
.tuesday night...west winds 10 to 20 knots becoming northwest
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.wednesday...northwest winds 5 to 15 knots backing southwest by
mid afternoon. waves calm to 2 feet. 
.wednesday night...southwest winds 5 to 15 knots diminishing to
less than 10 knots after midnight. waves calm to 2 feet. 
.thursday...southwest winds 10 to 20 knots backing south. a
chance of showers. waves calm to 2 feet. 
.friday...southwest winds 15 to 25 knots becoming northwest 5 to
15 knots. a chance of showers. waves building to 1 to 3 feet,
then subsiding to calm to 2 feet. 

$$

fzus63 kmqt 170201
glfls 
expires:202608170800;;321555

open lake forecast for lake superior
national weather service marquette mi
1001 pm 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...

a 30.1 inch high pressure expands over the midwest tonight, 
extending a 30.0 inch ridge over lake superior. this high weakens to 
30.0 inches on monday and shifts south as a 29.8 inch trough, 
associated with a 29.6 inch low over the hudson bay, builds over 
lake superior. troughing lingers until tuesday afternoon when weak 
29.9 inch ridging returns to lake superior. 30.0 inch high pressure 
settles over the northern plains tuesday afternoon and night, 
eventually moving over lake superior wednesday evening before 
expanding to cover much of the great lakes by thursday afternoon. 
friday into the weekend, a low pressure of around 29.8 inches 
transits across northern ontario.




lsz264-170800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
1001 pm edt sun aug 16 2026

.rest of tonight...west 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. waves building to 1 to 3 feet. 
.monday night...southwest winds 10 to 20 knots veering west late.
a slight chance of thunderstorms through midnight. a chance of
showers. waves building to 2 to 4 feet, then subsiding to calm to
2 feet. 
.tuesday...west winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. waves building to 1 to 3 feet. 
.tuesday night...west winds 10 to 20 knots becoming northwest
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.wednesday...northwest winds 5 to 15 knots backing west by mid
afternoon. waves calm to 2 feet. 
.wednesday night...west winds 5 to 15 knots diminishing to less
than 10 knots after midnight. waves calm to 2 feet. 
.thursday...southwest winds 5 to 15 knots becoming south 10 to
20 knots. waves calm to 2 feet. 
.friday...southwest winds 15 to 25 knots becoming northwest 5 to
15 knots. a chance of showers. waves building to 1 to 3 feet,
then subsiding to calm to 2 feet. 

$$

fzus63 kmqt 170201
glfls 
expires:202608170800;;321556

open lake forecast for lake superior
national weather service marquette mi
1001 pm 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...

a 30.1 inch high pressure expands over the midwest tonight, 
extending a 30.0 inch ridge over lake superior. this high weakens to 
30.0 inches on monday and shifts south as a 29.8 inch trough, 
associated with a 29.6 inch low over the hudson bay, builds over 
lake superior. troughing lingers until tuesday afternoon when weak 
29.9 inch ridging returns to lake superior. 30.0 inch high pressure 
settles over the northern plains tuesday afternoon and night, 
eventually moving over lake superior wednesday evening before 
expanding to cover much of the great lakes by thursday afternoon. 
friday into the weekend, a low pressure of around 29.8 inches 
transits across northern ontario.




lsz265-170800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
1001 pm edt sun aug 16 2026

.rest of tonight...west winds 10 to 20 knots. waves calm to
2 feet. 
.monday...west winds 10 to 20 knots becoming southwest 5 to
15 knots late. waves calm to 2 feet. 
.monday night...south winds 10 to 20 knots veering southwest
after midnight, then becoming west 15 to 25 knots late. a chance
of showers. waves calm to 2 feet. 
.tuesday...west winds 15 to 25 knots. waves building to 2 to
4 feet, then subsiding 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 veering north by mid
afternoon. waves calm to 2 feet. 
.wednesday night...southwest winds 5 to 15 knots veering west
after midnight. waves calm to 2 feet. 
.thursday...southeast winds 5 to 15 knots becoming south 10 to
20 knots. waves calm to 2 feet. 
.friday...southwest winds 10 to 20 knots veering northwest. a
chance of showers. waves calm to 2 feet. 

$$

fzus63 kmqt 170201
glfls 
expires:202608170800;;321557

open lake forecast for lake superior
national weather service marquette mi
1001 pm 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...

a 30.1 inch high pressure expands over the midwest tonight, 
extending a 30.0 inch ridge over lake superior. this high weakens to 
30.0 inches on monday and shifts south as a 29.8 inch trough, 
associated with a 29.6 inch low over the hudson bay, builds over 
lake superior. troughing lingers until tuesday afternoon when weak 
29.9 inch ridging returns to lake superior. 30.0 inch high pressure 
settles over the northern plains tuesday afternoon and night, 
eventually moving over lake superior wednesday evening before 
expanding to cover much of the great lakes by thursday afternoon. 
friday into the weekend, a low pressure of around 29.8 inches 
transits across northern ontario.




lsz266-170800-
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 sun aug 16 2026

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

$$

fzus63 kmqt 170201
glfls 
expires:202608170800;;321558

open lake forecast for lake superior
national weather service marquette mi
1001 pm 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...

a 30.1 inch high pressure expands over the midwest tonight, 
extending a 30.0 inch ridge over lake superior. this high weakens to 
30.0 inches on monday and shifts south as a 29.8 inch trough, 
associated with a 29.6 inch low over the hudson bay, builds over 
lake superior. troughing lingers until tuesday afternoon when weak 
29.9 inch ridging returns to lake superior. 30.0 inch high pressure 
settles over the northern plains tuesday afternoon and night, 
eventually moving over lake superior wednesday evening before 
expanding to cover much of the great lakes by thursday afternoon. 
friday into the weekend, a low pressure of around 29.8 inches 
transits across northern ontario.




lsz267-170800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
1001 pm edt sun aug 16 2026

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

$$