fzus61 kbuf 091502
glflo 
expires:202512092200;;280937

open lake forecast for lake ontario
national weather service buffalo ny
1002 am est tue dec 9 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 29.5 inch surface low will move across the upper great 
lakes tuesday, then a stronger low averaging 29.2 inches will 
approach the region tuesday night and potentially move northwest of 
the lake wednesday. a 29.9 inch high is expected to move into the 
great lakes region thursday, followed by a 29.6 inch low which may 
approach the lake from the northwest late friday. 30.0 inches will 
average across the lower great lakes region saturday.


loz064-065-092200-
lake ontario open waters from sodus bay to the saint lawrence
river-
1002 am est tue dec 9 2025

.this afternoon...south winds 15 to 25 knots. snow showers likely
late. waves 3 to 6 feet building to 4 to 7 feet. waves
occasionally around 9 feet. 
.tonight...south winds to 30 knots. snow showers likely early,
then a chance of snow. snow likely with a chance of rain late.
waves 5 to 8 feet. waves occasionally around 10 feet. 
.wednesday...south winds 20 to 25 knots becoming southwest. rain
and snow. waves 3 to 6 feet building to 4 to 7 feet. waves
occasionally around 9 feet. 
.wednesday night...west winds to 30 knots becoming northwest.
snow showers and rain in the evening, then snow showers
overnight. waves 5 to 9 feet. waves occasionally around 11 feet. 
.thursday...west winds to 30 knots becoming northwest 15 to
25 knots. snow showers likely during the day, then a chance of
snow showers thursday night. waves 7 to 10 feet subsiding to 5 to
8 feet. waves occasionally around 13 feet. 
.friday...northwest winds 15 to 20 knots becoming southwest. a
chance of snow showers during the day, then snow showers likely
friday night. waves 4 to 7 feet subsiding to 2 to 4 feet. waves
occasionally around 9 feet. 
.saturday...southwest winds to 30 knots becoming west and
diminishing to 15 to 20 knots. snow showers likely. waves 5 to
8 feet building to 7 to 10 feet, then subsiding to 5 to 8 feet.
waves occasionally around 13 feet. 

$$

fzus61 kbuf 091502
glflo 
expires:202512092200;;280935

open lake forecast for lake ontario
national weather service buffalo ny
1002 am est tue dec 9 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 29.5 inch surface low will move across the upper great 
lakes tuesday, then a stronger low averaging 29.2 inches will 
approach the region tuesday night and potentially move northwest of 
the lake wednesday. a 29.9 inch high is expected to move into the 
great lakes region thursday, followed by a 29.6 inch low which may 
approach the lake from the northwest late friday. 30.0 inches will 
average across the lower great lakes region saturday.


loz062-092200-
lake ontario open waters from the niagara river to hamlin beach-
1002 am est tue dec 9 2025

.this afternoon...south winds 15 to 25 knots. a chance of snow
showers early. snow showers likely late. waves
2 to 3 feet building to 3 to 6 feet. 
.tonight...southwest winds 15 to 25 knots becoming south. lake
effect snow showers in the evening, then snow likely after
midnight. snow with a chance of rain late. waves 4 to 7 feet
subsiding to 3 to 5 feet. waves occasionally around 9 feet. 
.wednesday...south winds 15 to 25 knots becoming west. rain and
snow in the morning, then rain in the afternoon. waves 2 to
4 feet building to 3 to 6 feet. 
.wednesday night...northwest winds 20 to 25 knots becoming west.
a chance of snow showers and rain in the evening, then a chance
of snow showers overnight. waves 5 to 7 feet. waves occasionally
around 9 feet. 
.thursday...west winds 15 to 25 knots. a chance of snow showers.
waves 5 to 8 feet subsiding to 3 to 6 feet. waves occasionally
around 10 feet. 
.friday...west winds 15 to 20 knots becoming southwest. a chance
of snow showers during the day, then snow showers likely friday
night. waves 3 to 5 feet. 
.saturday...west winds to 30 knots diminishing to 15 to 20 knots.
snow showers likely during the day, then a chance of snow showers
saturday night. waves 5 to 8 feet. waves occasionally around
10 feet. 

$$

fzus61 kbuf 091502
glflo 
expires:202512092200;;280936

open lake forecast for lake ontario
national weather service buffalo ny
1002 am est tue dec 9 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 29.5 inch surface low will move across the upper great 
lakes tuesday, then a stronger low averaging 29.2 inches will 
approach the region tuesday night and potentially move northwest of 
the lake wednesday. a 29.9 inch high is expected to move into the 
great lakes region thursday, followed by a 29.6 inch low which may 
approach the lake from the northwest late friday. 30.0 inches will 
average across the lower great lakes region saturday.


loz063-092200-
lake ontario open waters from hamlin beach to sodus bay-
1002 am est tue dec 9 2025

.this afternoon...south winds 15 to 25 knots. snow showers likely
late. waves 2 to 4 feet building to 3 to 5 feet. 
.tonight...south winds 15 to 25 knots. snow showers likely early,
then a chance of snow. snow with rain likely late. waves 3 to
6 feet. 
.wednesday...south winds 15 to 25 knots becoming southwest. rain
and snow in the morning, then rain in the afternoon. waves 3 to
6 feet. 
.wednesday night...west winds 20 to 25 knots becoming northwest.
snow showers likely with rain in the evening, then snow showers
likely overnight. waves 4 to 7 feet building to 6 to 9 feet.
waves occasionally around 11 feet. 
.thursday...west winds to 30 knots becoming northwest. a chance
of snow showers during the day, then snow showers likely thursday
night. waves 6 to 10 feet subsiding to 5 to 8 feet. waves
occasionally around 13 feet. 
.friday...west winds 15 to 20 knots becoming southwest. snow
showers likely. waves 3 to 6 feet subsiding to 2 to 4 feet. 
.saturday...southwest winds to 30 knots becoming west and
diminishing to 15 to 20 knots. snow showers likely during the
day, then a chance of snow showers saturday night. waves 5 to
8 feet building to 7 to 10 feet, then subsiding to 5 to 8 feet.
waves occasionally around 13 feet. 

$$

fzus61 kcle 091413
glfle 
expires:202512092115;;279624

open lake forecast for lake erie
national weather service cleveland oh
913 am est tue dec 9 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...
a warm front will move northward across lake erie today. a strong low
pressure system will track north of lake erie on wednesday and
deepen to 29.20 inches as it moves towards southern quebec. a
strong cold front will sweep eastward across lake erie on 
wednesday. behind the cold front, a trough averaging 29.90 inches 
will linger over the lake erie region through thursday. on 
friday, a ridge averaging 30.10 inches will build from the west 
before a cold front sweeps generally eastward across lake erie on 
saturday.


lez162-092115-
detroit river lt. to maumee bay oh to reno beach oh beyond 5nm
offshoreline to us-canadian border-
913 am est tue dec 9 2025

.rest of today...south winds 20 to 25 knots becoming southwest.
snow late this morning. waves 3 to 5 feet. 
.tonight...southwest winds 15 to 25 knots increasing to 30 knots.
rain and snow from late evening on. waves 2 to 4 feet building to
3 to 6 feet. 
.wednesday...southwest winds to 30 knots becoming northwest. rain
and snow. waves 3 to 6 feet. 
.wednesday night...northwest winds 15 to 25 knots becoming west.
snow likely in the evening. waves 2 to 4 feet. 
.thursday...west winds 15 to 20 knots diminishing to 10 to
15 knots. waves 1 to 3 feet. 
.friday...west winds 10 to 15 knots increasing to 15 to 25 knots.
a chance of snow. waves 1 to 3 feet building to 3 to 5 feet. 
.saturday...west winds 15 to 25 knots. a chance of snow. waves
3 to 5 feet subsiding to 2 to 4 feet. 

$$

fzus61 kcle 091413
glfle 
expires:202512092115;;279625

open lake forecast for lake erie
national weather service cleveland oh
913 am est tue dec 9 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...
a warm front will move northward across lake erie today. a strong low
pressure system will track north of lake erie on wednesday and
deepen to 29.20 inches as it moves towards southern quebec. a
strong cold front will sweep eastward across lake erie on 
wednesday. behind the cold front, a trough averaging 29.90 inches 
will linger over the lake erie region through thursday. on 
friday, a ridge averaging 30.10 inches will build from the west 
before a cold front sweeps generally eastward across lake erie on 
saturday.


lez163-164-092115-
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-
913 am est tue dec 9 2025

...gale warning in effect from late tonight through wednesday
evening...

.rest of today...south winds to 30 knots becoming southwest. snow
late this morning, then a slight chance of snow early this
afternoon. waves 3 to 5 feet building to 4 to 7 feet, then
subsiding to 3 to 6 feet. waves occasionally around 9 feet. 
.tonight...southwest winds to 30 knots. a chance of rain and snow
late in the evening. rain and snow after midnight. waves 3 to
6 feet building to 4 to 7 feet. waves occasionally around 9 feet.
.wednesday...southwest gales to 40 knots becoming west. rain in
the morning, then snow and rain in the afternoon. waves 5 to
9 feet. waves occasionally around 11 feet. 
.wednesday night...northwest winds to 30 knots. snow in the
evening. waves 4 to 7 feet subsiding to 3 to 6 feet. waves
occasionally around 9 feet. 
.thursday...west winds 15 to 20 knots diminishing to 10 to
15 knots. waves 3 to 5 feet subsiding to 1 to 3 feet. 
.friday...west winds 10 to 15 knots increasing to 30 knots. a
chance of snow. waves 1 to 3 feet building to 4 to 7 feet. waves
occasionally around 9 feet. 
.saturday...west winds to 30 knots diminishing to 15 to 25 knots.
a chance of snow. waves 4 to 7 feet subsiding to 2 to 4 feet.
waves occasionally around 9 feet. 

$$

fzus61 kcle 091413
glfle 
expires:202512092115;;279626

open lake forecast for lake erie
national weather service cleveland oh
913 am est tue dec 9 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...
a warm front will move northward across lake erie today. a strong low
pressure system will track north of lake erie on wednesday and
deepen to 29.20 inches as it moves towards southern quebec. a
strong cold front will sweep eastward across lake erie on 
wednesday. behind the cold front, a trough averaging 29.90 inches 
will linger over the lake erie region through thursday. on 
friday, a ridge averaging 30.10 inches will build from the west 
before a cold front sweeps generally eastward across lake erie on 
saturday.


lez165>167-092115-
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-
913 am est tue dec 9 2025

...gale warning in effect from late tonight through wednesday
evening...

.rest of today...south winds to 30 knots becoming southwest.
snow, then a slight chance of rain and snow late. waves 4 to
7 feet building to 7 to 11 feet. waves occasionally around
14 feet. 
.tonight...southwest winds to 30 knots increasing to 35 knot
gales after midnight. a chance of rain and snow late in the
evening. rain with snow likely after midnight, then rain late.
waves 7 to 11 feet, then 8 to 11 feet. waves occasionally around
14 feet. 
.wednesday...southwest gales to 35 knots becoming west. rain in
the morning, then rain and snow in the afternoon. waves 10 to
15 feet. waves occasionally around 19 feet. 
.wednesday night...northwest winds to 30 knots. snow and rain in
the evening. waves 7 to 11 feet subsiding to 5 to 9 feet. waves
occasionally around 14 feet. 
.thursday...west winds 15 to 25 knots. a chance of snow. waves
5 to 8 feet subsiding to 3 to 5 feet. waves occasionally around
10 feet. 
.friday...west winds 15 to 20 knots increasing to 30 knots. a
chance of snow during the day, then snow likely friday night.
waves 2 to 4 feet building to 7 to 10 feet. waves occasionally
around 13 feet. 
.saturday...west winds to 30 knots. snow likely during the day,
then a chance of snow saturday night. waves 7 to 10 feet
subsiding to 5 to 8 feet. waves occasionally around 13 feet. 

$$

fzus61 kcle 091413
glfle 
expires:202512092115;;279627

open lake forecast for lake erie
national weather service cleveland oh
913 am est tue dec 9 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...
a warm front will move northward across lake erie today. a strong low
pressure system will track north of lake erie on wednesday and
deepen to 29.20 inches as it moves towards southern quebec. a
strong cold front will sweep eastward across lake erie on 
wednesday. behind the cold front, a trough averaging 29.90 inches 
will linger over the lake erie region through thursday. on 
friday, a ridge averaging 30.10 inches will build from the west 
before a cold front sweeps generally eastward across lake erie on 
saturday.


lez061-168-169-092115-
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-
913 am est tue dec 9 2025

...gale warning in effect from late tonight through wednesday
evening...

.rest of today...south winds to 30 knots becoming southwest. a
slight chance of snow late this morning, then snow early this
afternoon. a chance of snow late. waves 3 to 5 feet building to
7 to 10 feet. waves occasionally around 13 feet. 
.tonight...southwest winds to 30 knots becoming south. a chance
of rain and snow through the early overnight, then rain and snow
late. waves 6 to 10 feet. waves occasionally around 13 feet. 
.wednesday...southwest gales to 35 knots becoming west. rain in
the morning, then rain and snow in the afternoon. waves 10 to
14 feet building to 11 to 16 feet. waves occasionally around
20 feet. 
.wednesday night...northwest winds to 30 knots becoming west.
snow likely with rain in the evening, then a chance of snow
overnight. waves 9 to 12 feet subsiding to 5 to 9 feet. waves
occasionally around 15 feet. 
.thursday...west winds 15 to 25 knots. a chance of snow. waves
5 to 8 feet subsiding to 3 to 5 feet. waves occasionally around
10 feet. 
.friday...west winds 15 to 25 knots. a chance of snow during the
day, then snow likely friday night. waves 2 to 4 feet building to
6 to 9 feet. waves occasionally around 11 feet. 
.saturday...west winds to 30 knots diminishing to 15 to 20 knots.
snow likely. waves 5 to 9 feet subsiding to 4 to 6 feet. waves
occasionally around 11 feet. 

$$

fzus63 kdtx 091442
glfsc 
expires:202512092245;;280204

lake st clair forecast
national weather service detroit/pontiac mi
942 am est tue dec 9 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...the next low pressure system will track through lake
superior tonight into tuesday, leading to strong south-southwest
winds gusting to around 30 knots. an even stronger low, 29.30
inches, is on track to move through lower michigan on wednesday
bringing snow and rain.


lcz460-092245-
lake st clair-
942 am est tue dec 9 2025

...small craft advisory in effect through late wednesday night...

.rest of today...southwest winds 20 to 25 knots diminishing to 15 to
20 knots late in the afternoon. snow late in the morning.. then a
chance of light snow early in the afternoon. patchy light freezing
drizzle early in the afternoon. waves 2 to 4 feet.
.tonight...southwest winds 15 to 20 knots becoming south to 30
knots. light snow after midnight. rain and light snow early in the
morning. waves 2 to 4 feet building to 3 to 5 feet after midnight.
waves occasionally around 7 feet.
.wednesday...southwest winds to 30 knots becoming west 20 to 25
knots in the late morning and afternoon. light rain until late
afternoon. light snow in the late morning and early afternoon...
then light snow likely early in the afternoon. waves 2 to 4 feet.
.wednesday night...northwest winds to 30 knots diminishing to 20 to
25 knots in the late evening and overnight. partly cloudy. waves 2
to 4 feet subsiding to 1 to 3 feet after midnight.
.thursday...west winds 15 to 20 knots diminishing to 10 to 15 knots
in the afternoon and evening. partly sunny becoming mostly cloudy.
waves 1 to 3 feet.
.friday...southwest winds 20 to 25 knots. mostly cloudy. a chance of
light snow. waves 1 to 3 feet.
.saturday...west winds to 30 knots. mostly cloudy with a chance of
light snow. waves 2 to 4 feet. a small craft advisory may be needed.

$$

fzus63 kdtx 091440
glflh 
expires:202512092245;;280175

open lake forecast for lake huron
national weather service detroit/pontiac mi
940 am est tue dec 9 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...the next low pressure system will track through lake
superior this morning, leading to strong south-southwest winds 
gusting to around 30 knots. an even stronger low, 29.30 inches, is
on track to move through lower michigan on wednesday bringing 
snow and rain.


lhz361-362-092245-
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-
940 am est tue dec 9 2025

.rest of today...south winds 20 to 25 knots with gusts to around
30 knots becoming southwest 15 to 20 knots late in the afternoon.
snow late in the morning...then a chance of snow in the
afternoon. patchy freezing drizzle in the afternoon. snow may be
heavy at times late in the morning. waves 8 to 12 feet. waves
occasionally around 15 feet. 
.tonight...west winds 10 to 15 knots becoming south 5 to 10 knots
after midnight...then increasing to 10 to 15 knots early in the
morning. a chance of snow after midnight. waves 5 to 7 feet
subsiding to 2 to 4 feet. waves occasionally around 10 feet. 
.wednesday...northeast winds 15 to 20 knots becoming north 20 to
25 knots with gusts to around 30 knots in the late morning and
afternoon. a chance of snow in the morning. waves 3 to 5 feet
building to 8 to 12 feet in the late morning and afternoon. waves
occasionally around 15 feet. 
.wednesday night...northwest winds 20 to 25 knots. gusts to
30 knots early in the evening. waves 8 to 12 feet. waves
occasionally around 15 feet. 
.thursday...northwest winds 15 to 20 knots decreasing to 10 to
15 knots late in the evening. waves 6 to 9 feet. waves
occasionally around 12 feet. 
.friday...west winds 10 to 15 knots becoming southwest 15 to
20 knots. a chance of snow in the late morning and early
afternoon. snow likely until early morning. waves 3 to 5 feet
building to 6 to 9 feet in the late evening and early morning.
waves occasionally around 12 feet. 
.saturday...west winds 20 to 25 knots decreasing to 15 to
20 knots in the late evening and early morning. a chance of snow.
waves 6 to 9 feet. waves occasionally around 12 feet. 


$$

fzus63 kdtx 091440
glflh 
expires:202512092245;;280176

open lake forecast for lake huron
national weather service detroit/pontiac mi
940 am est tue dec 9 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...the next low pressure system will track through lake
superior this morning, leading to strong south-southwest winds 
gusting to around 30 knots. an even stronger low, 29.30 inches, is
on track to move through lower michigan on wednesday bringing 
snow and rain.


lhz363-462>464-092245-
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-
940 am est tue dec 9 2025

.rest of today...south winds to 30 knots becoming southwest 20 to
25 knots in the afternoon. snow late in the morning...then a
chance of snow in the afternoon. snow may be heavy at times late
in the morning. waves 8 to 12 feet. waves occasionally around
15 feet. 
.tonight...southwest winds 15 to 20 knots becoming south 10 to
15 knots after midnight. snow after midnight. waves 5 to 7 feet.
waves occasionally around 10 feet. 
.wednesday...south winds 15 to 20 knots becoming north 20 to
25 knots with gusts to around 30 knots in the late morning and
early afternoon...then increasing to 30 knots with gusts to
35 knot gales early in the afternoon. snow in the morning...then
a chance of snow in the afternoon. waves 4 to 6 feet building to
10 to 14 feet in the late morning and afternoon. waves
occasionally around 18 feet. 
.wednesday night...northwest winds to 30 knots becoming west
20 to 25 knots after midnight. gusts to 35 knot gales. a chance
of snow. waves 10 to 14 feet. waves occasionally around 18 feet. 
.thursday...west winds 20 to 25 knots decreasing to 15 to
20 knots. waves 6 to 9 feet. waves occasionally around 12 feet. 
.friday...west winds 10 to 15 knots becoming southwest 20 to
25 knots. a chance of snow in the late morning and early
afternoon. snow likely until early morning. waves 3 to 5 feet
building to 6 to 9 feet in the late evening and early morning.
waves occasionally around 12 feet. 
.saturday...west winds to 30 knots decreasing to 20 to 25 knots
with gusts to around 30 knots. a chance of snow. waves 6 to
9 feet. waves occasionally around 12 feet. 


$$

fzus63 kmkx 091513
glflm 
expires:202512092215;;281790

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
913 am cst tue dec 9 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...

low pressure around 29.7 inches over lake superior this morning
has brought southwest gales to the northern half of the lake. the
winds will gradually weaken over the next few hours to below gale
force.

a much stronger low around 29.2 inches will then track from
minnesota across southern lake mi and into lower mi tonight. 
southwest to westerly gales will develop ahead of the low over 
the southern third of the lake tonight, followed by the potential
for northwest to northerly gales on wednesday after the low 
passes. the northwest gales will bring more widespread gales
across the southern two thirds of the lake. a gale warning is now
in effect for the south third starting mid evening tonight and
starting for the central third early wednesday morning (11z). the
brisk winds will then gradually diminish wednesday night. a 
period of northwesterly gales may then return friday night into 
saturday as a strong arctic front moves through the great lakes 
region. heavy freezing spray may develop.


lmz080-673-675-777-779-874-876-878-092215-
lake michigan from michigan city in to st. joseph mi 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 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-
913 am cst tue dec 9 2025

north point light wi to grand haven mi south...

...gale warning in effect from 9 pm cst this evening through
wednesday afternoon...

.rest of today...southwest winds to 30 kt diminishing to 10 to
20 kt. chance of rain this afternoon. waves 8 to 11 ft
occasionally to 14 ft subsiding to 4 to 7 ft occasionally to
9 ft. 
.tonight...southwest winds to 30 kt becoming south gales to 35 kt
late in the evening, then becoming southwest gales to 40 kt after
midnight becoming west late. chance of rain. waves 4 to 6 ft
occasionally to 8 ft building to 8 to 12 ft occasionally to
16 ft. 
.wednesday...west gales to 40 kt becoming northwest gales to
35 kt. snow and rain in the morning, then chance of snow in the
afternoon. waves 8 to 12 ft occasionally to 16 ft building to
14 to 18 ft occasionally to 23 ft. 
.wednesday night...northwest winds to 30 kt diminishing to 15 to
25 kt. chance of snow in the evening. waves 10 to 14 ft
occasionally to 18 ft subsiding to 7 to 10 ft occasionally to
13 ft. 
.thursday...northwest winds 10 to 20 kt becoming west. chance of
snow in the morning. waves 4 to 7 ft occasionally to 9 ft
subsiding to 4 to 6 ft occasionally to 8 ft. 
.thursday night...west winds 10 to 15 kt increasing to 10 to
20 kt. chance of snow. waves 2 to 4 ft. 
.friday...west winds 15 to 25 kt increasing to 30 kt. chance of
snow. waves 4 to 6 ft occasionally to 8 ft building to 6 to 9 ft
occasionally to 12 ft. 
.saturday...northwest winds to 30 kt. freezing spray. chance of
snow. waves 8 to 12 ft occasionally to 16 ft subsiding to 7 to
10 ft occasionally to 13 ft.  

$$

fzus63 kmkx 091513
glflm 
expires:202512092215;;281788

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
913 am cst tue dec 9 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...

low pressure around 29.7 inches over lake superior this morning
has brought southwest gales to the northern half of the lake. the
winds will gradually weaken over the next few hours to below gale
force.

a much stronger low around 29.2 inches will then track from
minnesota across southern lake mi and into lower mi tonight. 
southwest to westerly gales will develop ahead of the low over 
the southern third of the lake tonight, followed by the potential
for northwest to northerly gales on wednesday after the low 
passes. the northwest gales will bring more widespread gales
across the southern two thirds of the lake. a gale warning is now
in effect for the south third starting mid evening tonight and
starting for the central third early wednesday morning (11z). the
brisk winds will then gradually diminish wednesday night. a 
period of northwesterly gales may then return friday night into 
saturday as a strong arctic front moves through the great lakes 
region. heavy freezing spray may develop.


lmz261-362-364-563-092215-
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 rock island passage to sturgeon bay wi-
913 am cst tue dec 9 2025

sturgeon bay wi to point betsie mi north...

.rest of today...west winds 15 to 25 kt diminishing to 10 to
20 kt. chance of snow late this morning. waves 7 to 10 ft
occasionally to 13 ft subsiding to 4 to 6 ft occasionally to
8 ft. 
.tonight...southwest winds 10 to 15 kt becoming south 10 to 20 kt
late in the evening, then becoming east after midnight becoming
northeast to 30 kt late. chance of snow in the evening, then snow
and slight chance of rain overnight. waves 2 to 4 ft building to
4 to 7 ft occasionally to 9 ft. 
.wednesday...northeast winds to 30 kt becoming northwest. chance
of snow in the morning. waves 7 to 10 ft occasionally to 13 ft
subsiding to 6 to 9 ft occasionally to 12 ft. 
.wednesday night...northwest winds to 30 kt diminishing to 15 to
25 kt. waves 4 to 7 ft occasionally to 9 ft subsiding to 4 to
6 ft occasionally to 8 ft. 
.thursday...northwest winds 15 to 25 kt diminishing to 10 to
20 kt. waves 2 to 4 ft subsiding to 1 to 3 ft. 
.thursday night...northwest winds 10 to 15 kt becoming west.
waves 1 to 3 ft. 
.friday...west winds 10 to 20 kt increasing to 30 kt. chance of
snow. waves 1 to 3 ft building to 4 to 6 ft occasionally to 8 ft.
.saturday...northwest winds to 30 kt. chance of snow. waves 4 to
7 ft occasionally to 9 ft subsiding to 3 to 5 ft.  

$$

fzus63 kmkx 091513
glflm 
expires:202512092215;;281791

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
913 am cst tue dec 9 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...

low pressure around 29.7 inches over lake superior this morning
has brought southwest gales to the northern half of the lake. the
winds will gradually weaken over the next few hours to below gale
force.

a much stronger low around 29.2 inches will then track from
minnesota across southern lake mi and into lower mi tonight. 
southwest to westerly gales will develop ahead of the low over 
the southern third of the lake tonight, followed by the potential
for northwest to northerly gales on wednesday after the low 
passes. the northwest gales will bring more widespread gales
across the southern two thirds of the lake. a gale warning is now
in effect for the south third starting mid evening tonight and
starting for the central third early wednesday morning (11z). the
brisk winds will then gradually diminish wednesday night. a 
period of northwesterly gales may then return friday night into 
saturday as a strong arctic front moves through the great lakes 
region. heavy freezing spray may develop.


lmz366-565-567-868-092215-
lake michigan from point betsie to manistee mi 5 nm offshore to
mid lake-
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-
913 am cst tue dec 9 2025

sturgeon bay wi to point betsie mi south to sheboygan wi to
pentwater mi...

...gale warning in effect from late tonight through wednesday
afternoon...

.rest of today...west winds 15 to 25 kt diminishing to 10 to
20 kt. chance of snow late this morning. waves 8 to 11 ft
occasionally to 14 ft subsiding to 4 to 6 ft occasionally to
8 ft. 
.tonight...south winds 10 to 20 kt increasing to 15 to 25 kt late
in the evening, then increasing to 30 kt after midnight veering
to north late. snow and rain. waves 2 to 4 ft building to 5 to
8 ft occasionally to 10 ft. 
.wednesday...north gales to 35 kt diminishing to 30 kt. snow
likely in the morning. waves 10 to 14 ft occasionally to 18 ft. 
.wednesday night...northwest winds to 30 kt diminishing to 10 to
20 kt overnight. waves 8 to 11 ft occasionally to 14 ft subsiding
to 4 to 7 ft occasionally to 9 ft. 
.thursday...northwest winds 10 to 20 kt. waves 4 to 6 ft
occasionally to 8 ft subsiding to 2 to 4 ft. 
.thursday night...northwest winds 10 to 15 kt becoming west.
waves 1 to 3 ft. 
.friday...west winds 10 to 20 kt increasing to 30 kt. snow
likely. waves 2 to 4 ft building to 4 to 7 ft occasionally to
9 ft. 
.saturday...northwest winds to 30 kt diminishing to 15 to 25 kt.
freezing spray. chance of snow. waves 7 to 10 ft occasionally to
13 ft subsiding to 5 to 8 ft occasionally to 10 ft.  

$$

fzus63 kmkx 091513
glflm 
expires:202512092215;;281789

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
913 am cst tue dec 9 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...

low pressure around 29.7 inches over lake superior this morning
has brought southwest gales to the northern half of the lake. the
winds will gradually weaken over the next few hours to below gale
force.

a much stronger low around 29.2 inches will then track from
minnesota across southern lake mi and into lower mi tonight. 
southwest to westerly gales will develop ahead of the low over 
the southern third of the lake tonight, followed by the potential
for northwest to northerly gales on wednesday after the low 
passes. the northwest gales will bring more widespread gales
across the southern two thirds of the lake. a gale warning is now
in effect for the south third starting mid evening tonight and
starting for the central third early wednesday morning (11z). the
brisk winds will then gradually diminish wednesday night. a 
period of northwesterly gales may then return friday night into 
saturday as a strong arctic front moves through the great lakes 
region. heavy freezing spray may develop.


lmz669-671-870-872-092215-
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 whitehall to pentwater mi 5 nm offshore to mid
lake-
lake michigan from grand haven to whitehall mi 5 nm offshore to
mid lake-
913 am cst tue dec 9 2025

sheboygan wi to pentwater mi south to north point light wi to
grand haven mi...

...gale warning in effect from late tonight through wednesday
afternoon...

.rest of today...west winds to 30 kt becoming southwest 10 to
20 kt. waves 8 to 11 ft occasionally to 14 ft subsiding to 4 to
7 ft occasionally to 9 ft. 
.tonight...southwest winds 15 to 25 kt becoming south to 30 kt
late in the evening, then becoming southwest gales to 35 kt after
midnight becoming west late. rain and snow. waves 3 to 5 ft
building to 8 to 11 ft occasionally to 14 ft. 
.wednesday...northwest gales to 40 kt diminishing to gales to
35 kt. snow and rain in the morning, then chance of snow in the
afternoon. waves 10 to 14 ft occasionally to 18 ft building to
14 to 18 ft occasionally to 23 ft. 
.wednesday night...northwest winds to 30 kt diminishing to 15 to
25 kt. waves 10 to 14 ft occasionally to 18 ft subsiding to 6 to
9 ft occasionally to 12 ft. 
.thursday...northwest winds 10 to 20 kt. waves 4 to 7 ft
occasionally to 9 ft subsiding to 3 to 5 ft. 
.thursday night...northwest winds 10 to 15 kt becoming west.
chance of snow. waves 2 to 4 ft. 
.friday...west winds 15 to 25 kt increasing to 30 kt. chance of
snow. waves 4 to 6 ft occasionally to 8 ft building to 6 to 9 ft
occasionally to 12 ft. 
.saturday...northwest winds to 30 kt. freezing spray. chance of
snow. waves 8 to 12 ft occasionally to 16 ft subsiding to 7 to
10 ft occasionally to 13 ft.  

$$

fzus63 kmqt 091501
glfls 
expires:202512092100;;280788

open lake forecast for lake superior
national weather service marquette mi
1000 am est tue dec 9 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 29.6 inch low over lake superior this morning will move east into 
ontario this afternoon, but troughing over the lake will persist and 
deepen to 29.5 inches as a 29.3 inch low currently over southern 
saskatchewan crosses central lake michigan at 29.2 inches tonight. 
29.6 inch troughing lingers over lake superior into wednesday as the 
low moves into southern quebec at 29.2 inches by wednesday night. 
this will allow 30.3 inch high pressure to rebuild over the northern 
plains late wednesday through thursday while extending weak ridging 
over lake superior. this may break down slightly early friday, but 
30.5 inch ridging over the northern plains then extends back into 
the great lakes this weekend.



lsz162-092100-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 am est tue dec 9 2025 /900 am cst tue dec 9 2025/

.rest of today...northwest winds 10 to 20 knots becoming west
5 to 15 knots by late morning, then backing south by mid
afternoon. a chance of snow showers in the afternoon. waves calm
to 2 feet. 
.tonight...east winds 10 to 20 knots becoming northeast 20 to
30 knots by midnight. snow showers likely in the evening, then a
chance of snow showers after midnight. freezing spray after
midnight. waves building to 6 to 9 feet occasionally to 11 feet. 
.wednesday...north winds 20 to 30 knots diminishing to 15 to
25 knots by late morning, then backing northwest by mid
afternoon. freezing spray in the morning. waves subsiding to 2 to
4 feet. 
.wednesday night...northwest winds 10 to 20 knots. waves
subsiding to calm to 2 feet. 
.thursday...northwest winds 5 to 15 knots backing west in the
afternoon. waves calm to 2 feet. 
.thursday night...northwest winds 10 to 20 knots backing west
after midnight. a chance of snow showers after midnight. waves
calm to 2 feet. 
.friday...northwest winds 20 to 30 knots. snow showers likely.
waves building to 3 to 6 feet occasionally to 8 feet, then
subsiding to 2 to 4 feet. 
.saturday...northwest winds 15 to 25 knots diminishing to 10 to
20 knots. waves subsiding to calm to 2 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 091501
glfls 
expires:202512092100;;280789

open lake forecast for lake superior
national weather service marquette mi
1000 am est tue dec 9 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 29.6 inch low over lake superior this morning will move east into 
ontario this afternoon, but troughing over the lake will persist and 
deepen to 29.5 inches as a 29.3 inch low currently over southern 
saskatchewan crosses central lake michigan at 29.2 inches tonight. 
29.6 inch troughing lingers over lake superior into wednesday as the 
low moves into southern quebec at 29.2 inches by wednesday night. 
this will allow 30.3 inch high pressure to rebuild over the northern 
plains late wednesday through thursday while extending weak ridging 
over lake superior. this may break down slightly early friday, but 
30.5 inch ridging over the northern plains then extends back into 
the great lakes this weekend.



lsz263-092100-
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-
1000 am est tue dec 9 2025

...gale warning in effect from late tonight through wednesday
morning...

.rest of today...northwest winds 5 to 15 knots. waves 2 to 4 feet
subsiding to calm to 2 feet. 
.tonight...east winds 10 to 20 knots becoming northeast 20 to
30 knots by midnight, then increasing to gales to 35 knots late.
a chance of snow showers. freezing spray after midnight. waves
building to 7 to 10 feet occasionally to 13 feet. 
.wednesday...north gales to 35 knots diminishing to 20 to
30 knots by late morning, then becoming northwest 15 to 25 knots
by mid afternoon. freezing spray in the morning. a slight chance
of snow showers in the morning. waves building to 8 to 11 feet
occasionally to 14 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet. 
.wednesday night...northwest winds 15 to 25 knots becoming north
10 to 20 knots after midnight. waves subsiding to 2 to 4 feet. 
.thursday...northwest winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon. waves subsiding to calm to 2 feet. 
.thursday night...northwest winds 5 to 15 knots backing west
after midnight. waves calm to 2 feet. 
.friday...west gales to 35 knots veering northwest. freezing
spray. snow showers likely. a chance of snow showers. waves
building to 5 to 9 feet occasionally to 11 feet. 
.saturday...northwest winds 20 to 30 knots diminishing to 15 to
25 knots. heavy freezing spray. waves subsiding to 2 to 4 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 091501
glfls 
expires:202512092100;;280790

open lake forecast for lake superior
national weather service marquette mi
1000 am est tue dec 9 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 29.6 inch low over lake superior this morning will move east into 
ontario this afternoon, but troughing over the lake will persist and 
deepen to 29.5 inches as a 29.3 inch low currently over southern 
saskatchewan crosses central lake michigan at 29.2 inches tonight. 
29.6 inch troughing lingers over lake superior into wednesday as the 
low moves into southern quebec at 29.2 inches by wednesday night. 
this will allow 30.3 inch high pressure to rebuild over the northern 
plains late wednesday through thursday while extending weak ridging 
over lake superior. this may break down slightly early friday, but 
30.5 inch ridging over the northern plains then extends back into 
the great lakes this weekend.



lsz264-092100-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
1000 am est tue dec 9 2025

...gale warning in effect from late tonight through wednesday
morning...

.rest of today...north winds 5 to 15 knots backing northwest.
waves 2 to 4 feet subsiding to calm to 2 feet. 
.tonight...northeast winds 10 to 20 knots increasing to gales to
35 knots. a slight chance of snow showers. freezing spray after
midnight. waves building to 7 to 10 feet occasionally to 13 feet.
.wednesday...north gales to 35 knots becoming northwest 20 to
30 knots. freezing spray. waves building to 8 to 11 feet
occasionally to 14 feet, then subsiding to 5 to 8 feet
occasionally to 10 feet. 
.wednesday night...northwest winds 20 to 30 knots becoming north
15 to 25 knots after midnight. waves subsiding to 3 to 6 feet
occasionally to 8 feet. 
.thursday...north winds 10 to 20 knots becoming northwest 5 to
15 knots in the afternoon. waves subsiding to 1 to 3 feet. 
.thursday night...northwest winds 5 to 15 knots. waves subsiding
to calm to 2 feet. 
.friday...west winds 20 to 30 knots becoming northwest gales to
35 knots. freezing spray. a chance of snow showers. waves
building to 7 to 10 feet occasionally to 13 feet. 
.saturday...northwest gales to 35 knots diminishing to 20 to
30 knots. freezing spray. a chance of snow showers. waves
subsiding to 3 to 6 feet occasionally to 8 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 091501
glfls 
expires:202512092100;;280791

open lake forecast for lake superior
national weather service marquette mi
1000 am est tue dec 9 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 29.6 inch low over lake superior this morning will move east into 
ontario this afternoon, but troughing over the lake will persist and 
deepen to 29.5 inches as a 29.3 inch low currently over southern 
saskatchewan crosses central lake michigan at 29.2 inches tonight. 
29.6 inch troughing lingers over lake superior into wednesday as the 
low moves into southern quebec at 29.2 inches by wednesday night. 
this will allow 30.3 inch high pressure to rebuild over the northern 
plains late wednesday through thursday while extending weak ridging 
over lake superior. this may break down slightly early friday, but 
30.5 inch ridging over the northern plains then extends back into 
the great lakes this weekend.



lsz265-092100-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
1000 am est tue dec 9 2025

...gale warning in effect wednesday morning...

.rest of today...west winds 15 to 25 knots becoming northwest
10 to 20 knots by mid afternoon. waves 1 to 3 feet subsiding to
calm to 2 feet. 
.tonight...north winds 10 to 20 knots veering northeast by
midnight, then increasing to 20 to 30 knots late. a chance of
snow showers. waves building to 5 to 8 feet occasionally to
10 feet. 
.wednesday...north gales to 40 knots becoming northwest gales to
35 knots by mid afternoon. a chance of snow showers. waves
building to 6 to 10 feet occasionally to 13 feet. 
.wednesday night...northwest gales to 35 knots diminishing to
20 to 30 knots after midnight. a slight chance of snow showers.
waves subsiding to 3 to 6 feet occasionally to 8 feet. 
.thursday...northwest winds 15 to 25 knots. a slight chance of
snow showers. waves subsiding to 1 to 3 feet. 
.thursday night...northwest winds 10 to 20 knots backing west
after midnight. waves subsiding to calm to 2 feet. 
.friday...west winds 20 to 30 knots becoming northwest gales to
40 knots. a chance of snow showers, then snow showers. freezing
spray. waves building to 7 to 10 feet occasionally to 13 feet. 
.saturday...northwest gales to 35 knots diminishing to 20 to
30 knots. freezing spray. snow showers likely, then a chance of
snow showers. waves subsiding to 3 to 5 feet occasionally to
7 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 091501
glfls 
expires:202512092100;;280792

open lake forecast for lake superior
national weather service marquette mi
1000 am est tue dec 9 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 29.6 inch low over lake superior this morning will move east into 
ontario this afternoon, but troughing over the lake will persist and 
deepen to 29.5 inches as a 29.3 inch low currently over southern 
saskatchewan crosses central lake michigan at 29.2 inches tonight. 
29.6 inch troughing lingers over lake superior into wednesday as the 
low moves into southern quebec at 29.2 inches by wednesday night. 
this will allow 30.3 inch high pressure to rebuild over the northern 
plains late wednesday through thursday while extending weak ridging 
over lake superior. this may break down slightly early friday, but 
30.5 inch ridging over the northern plains then extends back into 
the great lakes this weekend.



lsz266-092100-
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-
1000 am est tue dec 9 2025

...gale warning in effect from wednesday morning through
wednesday evening...

.rest of today...west winds 15 to 25 knots becoming northwest
10 to 20 knots by mid afternoon. a chance of snow showers. waves
3 to 5 feet occasionally to 7 feet subsiding to 1 to 3 feet. 
.tonight...north winds 10 to 20 knots becoming northeast 15 to
25 knots by midnight, then increasing to gales to 35 knots late.
a chance of snow showers. waves subsiding to calm to 2 feet, then
building to 5 to 8 feet occasionally to 10 feet. 
.wednesday...north gales to 40 knots backing northwest by mid
afternoon. freezing spray. a chance of snow showers. waves
building to 8 to 11 feet occasionally to 14 feet. 
.wednesday night...northwest gales to 35 knots becoming north
20 to 30 knots after midnight. a chance of snow showers. waves
building to 9 to 12 feet occasionally to 15 feet, then subsiding
to 5 to 8 feet occasionally to 10 feet. 
.thursday...north winds 15 to 25 knots backing northwest in the
afternoon. a chance of snow showers. waves subsiding to 2 to
4 feet. 
.thursday night...northwest winds 10 to 20 knots. a chance of
snow showers. waves subsiding to 1 to 3 feet. 
.friday...west winds 20 to 30 knots becoming northwest gales to
35 knots. a chance of snow showers, then snow showers. freezing
spray. waves building to 10 to 14 feet occasionally to 18 feet. 
.saturday...northwest gales to 35 knots. freezing spray. snow
showers. a chance of snow showers. waves subsiding to 5 to 8 feet
occasionally to 10 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 091501
glfls 
expires:202512092100;;280793

open lake forecast for lake superior
national weather service marquette mi
1000 am est tue dec 9 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 29.6 inch low over lake superior this morning will move east into 
ontario this afternoon, but troughing over the lake will persist and 
deepen to 29.5 inches as a 29.3 inch low currently over southern 
saskatchewan crosses central lake michigan at 29.2 inches tonight. 
29.6 inch troughing lingers over lake superior into wednesday as the 
low moves into southern quebec at 29.2 inches by wednesday night. 
this will allow 30.3 inch high pressure to rebuild over the northern 
plains late wednesday through thursday while extending weak ridging 
over lake superior. this may break down slightly early friday, but 
30.5 inch ridging over the northern plains then extends back into 
the great lakes this weekend.



lsz267-092100-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
1000 am est tue dec 9 2025

.rest of today...west winds 15 to 25 knots diminishing to 10 to
20 knots. a chance of snow showers. waves 3 to 5 feet
occasionally to 7 feet subsiding to 1 to 3 feet. 
.tonight...west winds 10 to 20 knots backing east by midnight,
then becoming northeast 20 to 30 knots late. a chance of snow
showers. waves subsiding to calm to 2 feet, then building to 3 to
5 feet occasionally to 7 feet. 
.wednesday...northeast winds 20 to 30 knots becoming north to
30 knots with a few gale force gusts to 35 knots possible by late
morning, then backing northwest by mid afternoon. freezing spray
in the morning. a chance of snow showers. waves building to 7 to
10 feet occasionally to 13 feet. 
.wednesday night...northwest gales to 35 knots becoming north
20 to 30 knots after midnight. a chance of snow showers. waves
building to 9 to 12 feet occasionally to 15 feet, then subsiding
to 5 to 8 feet occasionally to 10 feet. 
.thursday...north winds 15 to 25 knots backing northwest in the
afternoon. a chance of snow showers. waves subsiding to 2 to
4 feet. 
.thursday night...northwest winds 10 to 20 knots. a chance of
snow showers. waves subsiding to 1 to 3 feet. 
.friday...west winds 15 to 25 knots becoming northwest 20 to
30 knots. a chance of snow showers, then snow showers. freezing
spray. waves building to 9 to 12 feet occasionally to 15 feet. 
.saturday...northwest winds 20 to 30 knots diminishing to 15 to
25 knots. freezing spray. snow showers likely. waves subsiding to
4 to 7 feet occasionally to 9 feet. 

note, wave height forecasts are for ice free areas.

$$