fzus61 kbuf 160202
glflo 
expires:202509160900;;054253

open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt mon sep 15 2025

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 large 30.3 inch high will slowly shift southeast 
across southern quebec into new england by late tuesday. the high 
will then drift slowly east off the new england coast wednesday into 
wednesday night while remaining ridged west over the lake. a cold 
front will cross the lake thursday night, with another large area of 
high pressure over western ontario building southeast across the 
lower great lakes friday and saturday.


loz062-160900-
lake ontario open waters from the niagara river to hamlin beach-
1002 pm edt mon sep 15 2025

.overnight...east winds 5 to 10 knots. waves 1 foot or
less. 
.tuesday...east winds 5 to 10 knots. patchy fog in the morning.
waves 1 to 2 feet. 
.tuesday night...east winds 10 knots or less. waves 1 foot or
less. 
.wednesday...east winds less than 10 knots becoming northeast.
waves 1 foot or less. 
.wednesday night...east winds less than 10 knots becoming west.
waves 1 foot or less. 
.thursday...west winds 5 to 10 knots becoming north. waves 2 feet
or less. 
.friday...northeast winds 15 to 20 knots becoming east. waves
1 to 3 feet building to 3 to 5 feet. 
.saturday...east winds 15 to 20 knots diminishing to 10 to
15 knots. waves 3 to 5 feet subsiding to 2 to 4 feet. 

$$

fzus61 kbuf 160202
glflo 
expires:202509160900;;054254

open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt mon sep 15 2025

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 large 30.3 inch high will slowly shift southeast 
across southern quebec into new england by late tuesday. the high 
will then drift slowly east off the new england coast wednesday into 
wednesday night while remaining ridged west over the lake. a cold 
front will cross the lake thursday night, with another large area of 
high pressure over western ontario building southeast across the 
lower great lakes friday and saturday.


loz063>065-160900-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 pm edt mon sep 15 2025

.overnight...northeast winds 5 to 10 knots becoming east.
waves 1 foot or less. 
.tuesday...east winds 5 to 10 knots becoming northeast. waves
1 foot or less. 
.tuesday night...northeast winds less than 10 knots becoming
southeast. waves 1 foot or less. 
.wednesday...south winds 10 knots or less becoming east. waves
1 foot or less. 
.wednesday night...east winds less than 10 knots becoming
southwest. waves 1 foot or less. 
.thursday...southwest winds 5 to 15 knots becoming north. waves
1 foot or less building to 1 to 3 feet. 
.friday...north winds 15 to 20 knots becoming northeast. waves
2 to 4 feet. 
.saturday...east winds 15 to 20 knots becoming southeast 10 to
15 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 

$$

fzus61 kcle 160150
glfle 
expires:202509160815;;053867

open lake forecast for lake erie
national weather service cleveland oh
950 pm edt mon sep 15 2025

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...
high pressure 30.20 inches over quebec will continue to influence
the region through the middle of the week. a weak cold front will
move south across lake erie thursday night into friday. another
area of high pressure 30.20 inches will build across the eastern
great lakes region behind the cold front on saturday.


lez162-163-160815-
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-
950 pm edt mon sep 15 2025

.overnight...east winds 10 to 15 knots. waves 1 to 3 feet. 
.tuesday...east winds 5 to 10 knots. waves 1 to 3 feet subsiding
to 1 foot or less. 
.tuesday night...east winds 5 to 10 knots. waves 1 foot or less. 
.wednesday...northeast winds 10 knots or less becoming east.
waves 1 foot or less. 
.wednesday night...southeast winds 10 knots or less becoming
southwest. waves 1 foot or less. 
.thursday...west winds 10 knots or less becoming northeast. waves
1 foot or less. 
.friday...northeast winds 5 to 15 knots becoming east 15 to
20 knots. waves 2 feet or less building to 2 to 4 feet. 
.saturday...east winds 15 to 20 knots becoming southeast 10 to
15 knots. waves 2 to 4 feet building to 3 to 5 feet, then
subsiding to 2 to 4 feet. 

$$

fzus61 kcle 160150
glfle 
expires:202509160815;;053868

open lake forecast for lake erie
national weather service cleveland oh
950 pm edt mon sep 15 2025

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...
high pressure 30.20 inches over quebec will continue to influence
the region through the middle of the week. a weak cold front will
move south across lake erie thursday night into friday. another
area of high pressure 30.20 inches will build across the eastern
great lakes region behind the cold front on saturday.


lez164>166-160815-
the islands to vermilion oh beyond 5 nm off shoreline to us-
canadian border-
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-
950 pm edt mon sep 15 2025

.overnight...east winds 15 to 20 knots diminishing to 10 to
15 knots. waves 2 to 4 feet. 
.tuesday...east winds 5 to 10 knots becoming northeast. waves
1 to 3 feet. 
.tuesday night...east winds 5 to 10 knots. waves 1 foot or less. 
.wednesday...southeast winds 10 knots or less becoming northeast.
waves 1 foot or less. 
.wednesday night...east winds 10 knots or less becoming south.
waves 1 foot or less. 
.thursday...southwest winds 10 knots or less becoming southeast.
waves 1 foot or less. 
.friday...northeast winds 10 to 15 knots becoming east 15 to
20 knots. waves 2 feet or less building to 3 to 6 feet. 
.saturday...east winds 15 to 20 knots becoming southeast. waves
3 to 5 feet. 

$$

fzus61 kcle 160150
glfle 
expires:202509160815;;053869

open lake forecast for lake erie
national weather service cleveland oh
950 pm edt mon sep 15 2025

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...
high pressure 30.20 inches over quebec will continue to influence
the region through the middle of the week. a weak cold front will
move south across lake erie thursday night into friday. another
area of high pressure 30.20 inches will build across the eastern
great lakes region behind the cold front on saturday.


lez061-167>169-160815-
ripley to buffalo ny extending from 5nm off shoreline to us-
canadian border-willowick to geneva-on-the-
lake oh beyond 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-
950 pm edt mon sep 15 2025

.overnight...northeast winds 15 to 20 knots becoming east
10 to 15 knots. waves 2 to 4 feet. 
.tuesday...southeast winds 10 knots or less becoming northeast.
waves 1 to 3 feet subsiding to 1 foot or less. 
.tuesday night...east winds 5 to 10 knots becoming southeast.
waves 1 foot or less. 
.wednesday...southeast winds less than 10 knots becoming
northeast. waves 1 foot or less. 
.wednesday night...east winds less than 10 knots becoming south.
waves 1 foot or less. 
.thursday...west winds 10 knots or less becoming northwest. waves
1 foot or less. 
.friday...northeast winds 10 to 15 knots becoming east 15 to
20 knots. waves 1 to 2 feet building to 3 to 5 feet. 
.saturday...east winds 15 to 20 knots becoming southeast. waves
3 to 5 feet subsiding to 2 to 4 feet. 

$$

fzus63 kdtx 160148
glfsc 
expires:202509161000;;053817

lake st clair forecast
national weather service detroit/pontiac mi
948 pm edt mon sep 15 2025

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, 30.30 inches, holds over the eastern
great lakes through the middle of the week, which will continue
to support dry weather and light winds. a second high pressure
system will then drop in from the central canadian provinces,
centering over eastern ontario by the end of the week.


lcz460-161000-
lake st clair-
948 pm edt mon sep 15 2025

.rest of tonight...east winds 5 to 10 knots. mostly clear. waves 2
feet or less.
.tuesday...northeast winds 5 to 10 knots. mostly sunny. waves 2 feet
or less.
.tuesday night...east winds 5 to 10 knots until early morning
becoming light and variable. mostly clear. waves 2 feet or less.
.wednesday...light and variable winds. sunny. waves 2 feet or less.
.wednesday night...light and variable winds. clear. waves nearly
calm.
.thursday...light and variable winds becoming south 5 to 10 knots in
the afternoon...then backing to the east in the evening. sunny
becoming mostly clear. waves 2 feet or less.
.friday...northeast winds 15 to 20 knots. mostly clear. waves 2 feet
or less.
.saturday...east winds 15 to 20 knots. partly cloudy. waves 1 to 3
feet.

$$

fzus63 kdtx 160147
glflh 
expires:202509161000;;053814

open lake forecast for lake huron
national weather service detroit/pontiac mi
947 pm edt mon sep 15 2025

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, 30.30 inches, holds over the eastern
great lakes through the middle of the week, which will continue
to support dry weather and light winds. a second high pressure
system will then drop in from the central canadian provinces,
centering over eastern ontario by the end of the week.


lhz361-362-161000-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
lake huron from presque isle light to sturgeon point mi beyond
5nm off shore-
947 pm edt mon sep 15 2025

.rest of tonight...east winds 5 to 10 knots becoming light and 
variable. waves 2 feet or less. 
.tuesday...light and variable winds. waves 2 feet or less. 
.tuesday night...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. waves 2 feet or
less. 
.thursday...light and variable winds becoming northwest 5 to
10 knots late in the morning...then becoming northeast 10 to
15 knots late in the evening. waves 2 feet or less. 
.friday...northeast winds 15 to 20 knots becoming east 5 to
10 knots early in the evening...then increasing to 10 to 15 knots
in the late evening and early morning. waves 4 to 6 feet. waves
occasionally around 8 feet. 
.saturday...east winds 15 to 20 knots decreasing to 10 to
15 knots until early morning. waves 3 to 5 feet. 


$$

fzus63 kdtx 160147
glflh 
expires:202509161000;;053815

open lake forecast for lake huron
national weather service detroit/pontiac mi
947 pm edt mon sep 15 2025

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, 30.30 inches, holds over the eastern
great lakes through the middle of the week, which will continue
to support dry weather and light winds. a second high pressure
system will then drop in from the central canadian provinces,
centering over eastern ontario by the end of the week.


lhz363-462>464-161000-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
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-
947 pm edt mon sep 15 2025

.rest of tonight...east winds 5 to 10 knots. waves 2 feet or
less. 
.tuesday...light and variable winds. waves 2 feet or less. 
.tuesday night...north winds 5 to 10 knots early in the evening
becoming light and variable. waves 2 feet or less. 
.wednesday...light and variable winds. waves 2 feet or less. 
.wednesday night...light and variable winds. waves 2 feet or
less. 
.thursday...light and variable winds becoming west 5 to 10 knots
late in the morning...then veering to the north late in the
afternoon. waves 2 feet or less. 
.friday...northeast winds 15 to 20 knots. waves 5 to 7 feet.
waves occasionally around 10 feet. 
.saturday...east winds 15 to 20 knots decreasing to 10 to
15 knots. waves 3 to 5 feet subsiding to 1 to 3 feet in the late
evening and early morning. 


$$

fzus63 kmkx 160148
glflm 
expires:202509160915;;053820

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
848 pm cdt mon sep 15 2025

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...

high pressure around 30.2 inches will remain over lake michigan
through wednesday as weak low pressure of 29.7 inches slowly lifts
from northern north dakota into the hudson bay today through
wednesday. expect light, generally southeasterly winds through
wednesday. a few areas of fog are possible each night through
wednesday as warm water and high pressure dominate the weather 
pattern. 

expecting winds to become easterly into thursday as low
pressure develops in the central plains, increasing and becoming
northeasterly thursday night into friday as low pressure 
approaches. a few thunderstorms are possible along a warm front
thursday night in the northern half of the open waters.


lmz080-671-673-675-777-779-872-874-876-878-160915-
lake michigan from michigan city in to st. joseph mi 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 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-
848 pm cdt mon sep 15 2025

port washington wi to whitehall mi south...

.rest of tonight...northeast winds 10 to 15 kt veering to
southeast. waves 1 to 2 ft. 
.tuesday...southeast winds 5 to 10 kt backing to north 10 to
15 kt. waves 1 to 2 ft. 
.tuesday night...north winds 10 to 15 kt becoming east. waves
1 to 2 ft. 
.wednesday...southeast winds 5 to 10 kt backing to northwest.
waves 1 ft or less. 
.wednesday night...east winds 5 to 10 kt veering to southeast.
waves nearly calm. 
.thursday...south winds 5 to 10 kt backing to northeast. waves
1 ft or less. 
.thursday night...northeast winds 10 to 15 kt becoming east.
waves 2 to 4 ft. 
.friday...east winds 10 to 15 kt becoming northeast. waves 2 to
4 ft. 
.saturday...southeast winds 10 to 20 kt. waves 4 to 6 ft
occasionally to 8 ft subsiding to 3 to 5 ft.  

$$

fzus63 kmkx 160148
glflm 
expires:202509160915;;053819

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
848 pm cdt mon sep 15 2025

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...

high pressure around 30.2 inches will remain over lake michigan
through wednesday as weak low pressure of 29.7 inches slowly lifts
from northern north dakota into the hudson bay today through
wednesday. expect light, generally southeasterly winds through
wednesday. a few areas of fog are possible each night through
wednesday as warm water and high pressure dominate the weather 
pattern. 

expecting winds to become easterly into thursday as low
pressure develops in the central plains, increasing and becoming
northeasterly thursday night into friday as low pressure 
approaches. a few thunderstorms are possible along a warm front
thursday night in the northern half of the open waters.


lmz261-362-364-366-563-565-567-669-868-870-160915-
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 sheboygan to port washington wi 5 nm offshore
to mid lake-
lake michigan from pentwater to manistee mi 5 nm offshore to mid
lake-
lake michigan from whitehall to pentwater mi 5 nm offshore to mid
lake-
848 pm cdt mon sep 15 2025

port washington wi to whitehall mi north...

.rest of tonight...east winds 10 to 15 kt becoming southeast.
waves 1 to 2 ft. 
.tuesday...south winds 10 to 15 kt. waves 1 to 2 ft. 
.tuesday night...south winds 5 to 10 kt. waves 1 ft or less.
.wednesday...south winds 10 to 15 kt becoming southwest. waves
1 ft or less. 
.wednesday night...southwest winds 5 to 10 kt backing to
southeast. waves 1 ft or less. 
.thursday...northeast winds 5 to 10 kt becoming north 10 to
15 kt. waves 1 to 2 ft. 
.thursday night...northeast winds 10 to 20 kt. waves 2 to 4 ft. 
.friday...northeast winds 10 to 20 kt. waves 2 to 4 ft. 
.saturday...southeast winds 10 to 20 kt. waves 4 to 6 ft
occasionally to 8 ft subsiding to 3 to 5 ft.  

$$

fzus63 kmqt 160201
glfls 
expires:202509160800;;054125

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt mon sep 15 2025

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 30.3 inch high over quebec will maintain a 30.1 inch ridge over 
lake superior through tonight. on tuesday the high will begin to 
weaken as it moves to and over new england. a 29.7 inch low moving 
through far northern ontario into the hudson bay area tuesday night 
brings troughing of 30.0 inches back to lake superior tuesday night 
through wednesday, before a 30.3 inch high stretching from the 
canadian prairies to northern ontario brings 30.1 inch ridging back 
over lake superior wednesday night into thursday morning. ridging is 
expected to strengthen to 30.3 inches on friday as the high digs 
through northern ontario towards the st. lawrence seaway. the ridge 
will weaken to 30.1 inches on saturday as the high pressure pushes 
away from the area, into the northeastern u.s.



lsz265-160800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
1001 pm edt mon sep 15 2025

.rest of tonight...south winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. waves 2 to 4 feet subsiding to
calm to 2 feet. 
.tuesday...south winds 10 to 20 knots backing southeast in the
afternoon. waves calm to 2 feet. 
.tuesday night...south winds 10 to 20 knots veering southwest
after midnight, then diminishing to 5 to 15 knots late. a slight
chance of showers and thunderstorms after midnight. waves calm to
2 feet. 
.wednesday...west winds 5 to 15 knots veering north by mid
afternoon. a chance of showers and a slight chance of
thunderstorms. waves calm to 2 feet. 
.wednesday night...north winds 5 to 15 knots. a slight chance of
thunderstorms through midnight. a chance of showers. waves calm
to 2 feet. 
.thursday...northeast winds 10 to 20 knots. waves calm to 2 feet.
.thursday night...northeast winds 10 to 20 knots veering east
after midnight. waves calm to 2 feet. 
.friday...east winds 10 to 20 knots veering southeast. waves
building to 1 to 3 feet, then subsiding to calm to 2 feet. 
.saturday...southeast winds 10 to 20 knots. a chance of showers.
waves calm to 2 feet. 

$$

fzus63 kmqt 160201
glfls 
expires:202509160800;;054126

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt mon sep 15 2025

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 30.3 inch high over quebec will maintain a 30.1 inch ridge over 
lake superior through tonight. on tuesday the high will begin to 
weaken as it moves to and over new england. a 29.7 inch low moving 
through far northern ontario into the hudson bay area tuesday night 
brings troughing of 30.0 inches back to lake superior tuesday night 
through wednesday, before a 30.3 inch high stretching from the 
canadian prairies to northern ontario brings 30.1 inch ridging back 
over lake superior wednesday night into thursday morning. ridging is 
expected to strengthen to 30.3 inches on friday as the high digs 
through northern ontario towards the st. lawrence seaway. the ridge 
will weaken to 30.1 inches on saturday as the high pressure pushes 
away from the area, into the northeastern u.s.



lsz266-160800-
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 mon sep 15 2025

.rest of tonight...south winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. waves 2 to 4 feet. 
.tuesday...south winds 10 to 20 knots. waves subsiding to calm to
2 feet. 
.tuesday night...south winds 10 to 20 knots becoming southwest
5 to 15 knots late. a slight chance of showers and thunderstorms
after midnight. waves building to 1 to 3 feet, then subsiding to
calm to 2 feet. 
.wednesday...west winds 5 to 15 knots. a slight chance of showers
and thunderstorms. waves calm to 2 feet. 
.wednesday night...north winds 5 to 15 knots. a slight chance of
thunderstorms through midnight. a chance of showers. waves calm
to 2 feet. 
.thursday...north winds 10 to 20 knots. waves calm to 2 feet. 
.thursday night...north winds 10 to 20 knots veering northeast
after midnight. waves building to 1 to 3 feet. 
.friday...east winds 10 to 20 knots veering southeast. waves
building to 2 to 4 feet, then subsiding to calm to 2 feet. 
.saturday...southeast winds 10 to 20 knots. a chance of showers.
waves subsiding to calm to 2 feet. 

$$

fzus63 kmqt 160201
glfls 
expires:202509160800;;054127

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt mon sep 15 2025

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 30.3 inch high over quebec will maintain a 30.1 inch ridge over 
lake superior through tonight. on tuesday the high will begin to 
weaken as it moves to and over new england. a 29.7 inch low moving 
through far northern ontario into the hudson bay area tuesday night 
brings troughing of 30.0 inches back to lake superior tuesday night 
through wednesday, before a 30.3 inch high stretching from the 
canadian prairies to northern ontario brings 30.1 inch ridging back 
over lake superior wednesday night into thursday morning. ridging is 
expected to strengthen to 30.3 inches on friday as the high digs 
through northern ontario towards the st. lawrence seaway. the ridge 
will weaken to 30.1 inches on saturday as the high pressure pushes 
away from the area, into the northeastern u.s.



lsz267-160800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
1001 pm edt mon sep 15 2025

.rest of tonight...southeast winds 10 to 20 knots veering south
after midnight. waves calm to 2 feet. 
.tuesday...southeast winds 10 to 20 knots. waves calm to 2 feet. 
.tuesday night...south winds 10 to 20 knots. waves calm to
2 feet. 
.wednesday...southwest winds 10 to 20 knots becoming west 5 to
15 knots by mid afternoon. a slight chance of showers and
thunderstorms. waves calm to 2 feet. 
.wednesday night...northwest winds 5 to 15 knots veering north
after midnight. a slight chance of thunderstorms through
midnight. a chance of showers. waves calm to 2 feet. 
.thursday...north winds 10 to 20 knots. waves calm to 2 feet. 
.thursday night...north winds 10 to 20 knots becoming northeast
15 to 25 knots after midnight. waves building to 1 to 3 feet. 
.friday...northeast winds 10 to 20 knots veering southeast. waves
subsiding to calm to 2 feet, then building to 1 to 3 feet. 
.saturday...southeast winds 10 to 20 knots. a chance of showers.
waves subsiding to calm to 2 feet. 

$$

fzus63 kmqt 160201
glfls 
expires:202509160800;;054122

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt mon sep 15 2025

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 30.3 inch high over quebec will maintain a 30.1 inch ridge over 
lake superior through tonight. on tuesday the high will begin to 
weaken as it moves to and over new england. a 29.7 inch low moving 
through far northern ontario into the hudson bay area tuesday night 
brings troughing of 30.0 inches back to lake superior tuesday night 
through wednesday, before a 30.3 inch high stretching from the 
canadian prairies to northern ontario brings 30.1 inch ridging back 
over lake superior wednesday night into thursday morning. ridging is 
expected to strengthen to 30.3 inches on friday as the high digs 
through northern ontario towards the st. lawrence seaway. the ridge 
will weaken to 30.1 inches on saturday as the high pressure pushes 
away from the area, into the northeastern u.s.



lsz162-160800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 pm edt mon sep 15 2025 /901 pm cdt mon sep 15 2025/

.rest of tonight...northeast winds 5 to 15 knots veering east
after midnight, then veering south late. a slight chance of
showers after midnight. waves calm to 2 feet. 
.tuesday...south winds 5 to 15 knots. waves calm to 2 feet. 
.tuesday night...southwest winds 5 to 15 knots veering west late.
a slight chance of showers and thunderstorms after midnight.
waves calm to 2 feet. 
.wednesday...west winds 5 to 15 knots backing southwest by mid
afternoon. a slight chance of showers and thunderstorms. waves
calm to 2 feet. 
.wednesday night...north winds 5 to 15 knots veering northeast
after midnight. a slight chance of showers and thunderstorms.
waves calm to 2 feet. 
.thursday...northeast winds 10 to 20 knots. waves building to
2 to 4 feet. 
.thursday night...northeast winds 10 to 20 knots increasing to
15 to 25 knots after midnight. waves subsiding to 1 to 3 feet,
then building to 2 to 4 feet. 
.friday...east winds 15 to 25 knots diminishing to 10 to
20 knots. waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to 1 to 3 feet. 
.saturday...east winds 10 to 20 knots diminishing to 5 to
15 knots. a chance of showers. waves subsiding to calm to 2 feet.

$$

fzus63 kmqt 160201
glfls 
expires:202509160800;;054123

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt mon sep 15 2025

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 30.3 inch high over quebec will maintain a 30.1 inch ridge over 
lake superior through tonight. on tuesday the high will begin to 
weaken as it moves to and over new england. a 29.7 inch low moving 
through far northern ontario into the hudson bay area tuesday night 
brings troughing of 30.0 inches back to lake superior tuesday night 
through wednesday, before a 30.3 inch high stretching from the 
canadian prairies to northern ontario brings 30.1 inch ridging back 
over lake superior wednesday night into thursday morning. ridging is 
expected to strengthen to 30.3 inches on friday as the high digs 
through northern ontario towards the st. lawrence seaway. the ridge 
will weaken to 30.1 inches on saturday as the high pressure pushes 
away from the area, into the northeastern u.s.



lsz263-160800-
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 mon sep 15 2025

.rest of tonight...southeast winds 5 to 15 knots veering south
after midnight. a slight chance of showers after midnight. waves
calm to 2 feet building to 1 to 3 feet, then subsiding to calm to
2 feet. 
.tuesday...south winds 5 to 15 knots. a slight chance of showers
through early afternoon. waves calm to 2 feet. 
.tuesday night...south winds 5 to 15 knots veering west late. a
slight chance of showers and thunderstorms after midnight. waves
calm to 2 feet. 
.wednesday...west winds 5 to 15 knots. a slight chance of showers
and thunderstorms. waves calm to 2 feet. 
.wednesday night...northeast winds 5 to 15 knots increasing to
10 to 20 knots after midnight. a slight chance of showers and
thunderstorms. waves calm to 2 feet. 
.thursday...northeast winds 10 to 20 knots. waves building to
2 to 4 feet. 
.thursday night...northeast winds 10 to 20 knots veering east
after midnight. waves subsiding to 1 to 3 feet, then building to
2 to 4 feet. 
.friday...east winds 15 to 25 knots diminishing to 10 to
20 knots. waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to calm to 2 feet. 
.saturday...east winds 5 to 15 knots veering southeast. a chance
of showers. waves building to 1 to 3 feet, then subsiding to calm
to 2 feet. 

$$

fzus63 kmqt 160201
glfls 
expires:202509160800;;054124

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt mon sep 15 2025

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 30.3 inch high over quebec will maintain a 30.1 inch ridge over 
lake superior through tonight. on tuesday the high will begin to 
weaken as it moves to and over new england. a 29.7 inch low moving 
through far northern ontario into the hudson bay area tuesday night 
brings troughing of 30.0 inches back to lake superior tuesday night 
through wednesday, before a 30.3 inch high stretching from the 
canadian prairies to northern ontario brings 30.1 inch ridging back 
over lake superior wednesday night into thursday morning. ridging is 
expected to strengthen to 30.3 inches on friday as the high digs 
through northern ontario towards the st. lawrence seaway. the ridge 
will weaken to 30.1 inches on saturday as the high pressure pushes 
away from the area, into the northeastern u.s.



lsz264-160800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
1001 pm edt mon sep 15 2025

.rest of tonight...south winds 10 to 20 knots diminishing to 5 to
15 knots late. a slight chance of showers after midnight. waves
2 to 4 feet subsiding to 1 to 3 feet. 
.tuesday...south winds 5 to 15 knots. a slight chance of showers
through early afternoon. waves subsiding to calm to 2 feet. 
.tuesday night...south winds 5 to 15 knots veering west late. a
slight chance of showers and thunderstorms after midnight. waves
calm to 2 feet. 
.wednesday...west winds 5 to 15 knots. a slight chance of
thunderstorms through early afternoon. a slight chance of
showers. waves calm to 2 feet. 
.wednesday night...north winds 5 to 15 knots. waves calm to
2 feet. 
.thursday...northeast winds 10 to 20 knots. waves building to
1 to 3 feet, then subsiding to calm to 2 feet. 
.thursday night...northeast winds 5 to 15 knots becoming east
10 to 20 knots after midnight. waves building to 2 to 4 feet. 
.friday...east winds 15 to 25 knots becoming southeast 10 to
20 knots. waves subsiding to calm to 2 feet. 
.saturday...southeast winds 10 to 20 knots diminishing to 5 to
15 knots. waves building to 1 to 3 feet, then subsiding to calm
to 2 feet. 

$$