fzus61 kbuf 041502
glflo 
expires:202512042200;;995702

open lake forecast for lake ontario
national weather service buffalo ny
1002 am est thu dec 4 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... behind a strong early morning cold front passing over 
the lake, a 30.4 inch high will build into the region its wake 
through tonight. the high will then quickly move east of the lake 
friday. another cold front will cross the lake late saturday and 
saturday night, this from a 29.3 inch low near northern james bay. 
then, another area of surface high pressure averaging 30.3 inches 
will build eastward across the great lakes through sunday, moving 
overhead monday.


loz064-065-042200-
lake ontario open waters from sodus bay to the saint lawrence
river-
1002 am est thu dec 4 2025

.this afternoon...northwest winds to 30 knots. a chance of snow
showers. waves 7 to 11 feet. waves occasionally around 14 feet. 
.tonight...northwest winds to 30 knots becoming southeast and
diminishing to 5 to 15 knots after midnight. a chance of snow
showers late. waves 6 to 9 feet subsiding to 2 feet or less.
waves occasionally around 11 feet. 
.friday...south winds 15 to 25 knots. waves 2 to 4 feet building
to 3 to 6 feet. 
.friday night...south winds 15 to 20 knots. waves 3 to 5 feet. 
.saturday...south winds 15 to 25 knots becoming northwest. snow
and rain showers likely. waves 3 to 6 feet building to 4 to
7 feet, then subsiding to 3 to 6 feet. waves occasionally around
9 feet. 
.sunday...north winds 10 to 15 knots. snow showers likely. waves
2 to 4 feet subsiding to 1 to 3 feet. 
.monday...north winds 5 to 15 knots becoming south 15 to
20 knots. a chance of snow showers monday night. waves 1 to
3 feet. 

$$

fzus61 kbuf 041502
glflo 
expires:202512042200;;995701

open lake forecast for lake ontario
national weather service buffalo ny
1002 am est thu dec 4 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... behind a strong early morning cold front passing over 
the lake, a 30.4 inch high will build into the region its wake 
through tonight. the high will then quickly move east of the lake 
friday. another cold front will cross the lake late saturday and 
saturday night, this from a 29.3 inch low near northern james bay. 
then, another area of surface high pressure averaging 30.3 inches 
will build eastward across the great lakes through sunday, moving 
overhead monday.


loz063-042200-
lake ontario open waters from hamlin beach to sodus bay-
1002 am est thu dec 4 2025

.this afternoon...northwest winds to 30 knots. lake effect snow
showers likely, then a chance of snow showers late. waves 8 to
12 feet subsiding to 7 to 10 feet. waves occasionally around
15 feet. 
.tonight...northwest winds 15 to 25 knots becoming south and
diminishing to 5 to 15 knots. waves 5 to 8 feet subsiding to 1 to
3 feet. waves occasionally around 10 feet. 
.friday...south winds 15 to 20 knots becoming southwest 10 to
15 knots. waves 1 to 3 feet building to 2 to 4 feet, then
subsiding to 1 to 3 feet. 
.friday night...southwest winds 10 to 15 knots becoming south
15 to 20 knots. waves 1 to 3 feet. 
.saturday...southwest winds 15 to 20 knots becoming northwest.
snow showers likely with a chance of rain showers during the day,
then a chance of snow and rain showers saturday night. waves 3 to
6 feet building to 4 to 7 feet, then subsiding to 3 to 5 feet.
waves occasionally around 9 feet. 
.sunday...north winds 10 to 15 knots. a chance of snow showers.
waves 2 to 4 feet subsiding to 1 to 3 feet. 
.monday...north winds 10 to 15 knots becoming south 15 to
20 knots. waves 1 to 3 feet. 

$$

fzus61 kbuf 041502
glflo 
expires:202512042200;;995700

open lake forecast for lake ontario
national weather service buffalo ny
1002 am est thu dec 4 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... behind a strong early morning cold front passing over 
the lake, a 30.4 inch high will build into the region its wake 
through tonight. the high will then quickly move east of the lake 
friday. another cold front will cross the lake late saturday and 
saturday night, this from a 29.3 inch low near northern james bay. 
then, another area of surface high pressure averaging 30.3 inches 
will build eastward across the great lakes through sunday, moving 
overhead monday.


loz062-042200-
lake ontario open waters from the niagara river to hamlin beach-
1002 am est thu dec 4 2025

.this afternoon...northwest winds to 30 knots diminishing to 15 to
25 knots. a chance of lake effect snow showers. waves 5 to
9 feet. waves occasionally around 11 feet. 
.tonight...northwest winds 15 to 20 knots becoming south 10 to
15 knots. waves 3 to 5 feet subsiding to 1 to 2 feet. 
.friday...south winds 10 to 15 knots becoming southwest 15 to
20 knots. waves 1 to 3 feet building to 2 to 4 feet. 
.friday night...southwest winds 10 to 15 knots increasing to
15 to 20 knots. waves 1 to 3 feet building to 2 to 4 feet. 
.saturday...southwest winds 15 to 25 knots becoming northwest and
diminishing to 10 to 15 knots. snow showers likely with a chance
of rain showers during the day, then a chance of snow and rain
showers saturday night. waves 3 to 6 feet subsiding to 2 to
4 feet. 
.sunday...north winds 10 to 15 knots. a chance of snow showers.
waves 1 to 3 feet. 
.monday...north winds 10 to 15 knots becoming southwest. waves
1 to 2 feet. 

$$

fzus61 kcle 041418
glfle 
expires:202512042130;;994261

open lake forecast for lake erie
national weather service cleveland oh
918 am est thu dec 4 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 ridge averaging 30.40 inches affects lake erie through friday
night as the embedded high pressure center wobbles east-northeastward
from the iowa area to atlantic waters near nova scotia. on 
saturday, a cold front should sweep generally eastward across lake
erie. behind the front, another ridge averaging 30.50 inches 
should impact lake erie on sunday through the first-half of monday
as the embedded high pressure center moves from the northern 
great plains toward the northeast united states. later on monday 
through this tuesday, the ridge should begin to exit eastward and 
allow a warm front to sweep northeastward across lake erie during 
the second-half of monday. 


lez162>164-042130-
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-
918 am est thu dec 4 2025

.rest of today...northwest winds 15 to 20 knots diminishing to
5 to 15 knots. waves 3 to 5 feet subsiding to 2 feet or less. 
.tonight...west winds 10 knots or less becoming south. waves
1 foot or less. 
.friday...southwest winds 10 to 15 knots. waves 1 to 2 feet. 
.friday night...southwest winds 10 to 15 knots increasing to
15 to 20 knots. waves 1 to 3 feet building to 2 to 4 feet. 
.saturday...southwest winds 15 to 20 knots becoming northwest
5 to 15 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.sunday...northwest winds 5 to 10 knots becoming north and
increasing to 15 to 20 knots. waves 1 to 3 feet building to 2 to
4 feet. 
.monday...northeast winds 10 to 15 knots becoming southwest 15 to
20 knots. a chance of snow showers monday night. waves 2 to
4 feet. 

$$

fzus61 kcle 041418
glfle 
expires:202512042130;;994262

open lake forecast for lake erie
national weather service cleveland oh
918 am est thu dec 4 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 ridge averaging 30.40 inches affects lake erie through friday
night as the embedded high pressure center wobbles east-northeastward
from the iowa area to atlantic waters near nova scotia. on 
saturday, a cold front should sweep generally eastward across lake
erie. behind the front, another ridge averaging 30.50 inches 
should impact lake erie on sunday through the first-half of monday
as the embedded high pressure center moves from the northern 
great plains toward the northeast united states. later on monday 
through this tuesday, the ridge should begin to exit eastward and 
allow a warm front to sweep northeastward across lake erie during 
the second-half of monday. 


lez165-166-042130-
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-
918 am est thu dec 4 2025

.rest of today...northwest winds 15 to 25 knots diminishing to
10 to 15 knots. a slight chance of snow showers late this
morning. waves 4 to 7 feet subsiding to 2 to 4 feet. waves
occasionally around 9 feet. 
.tonight...northwest winds 5 to 15 knots becoming south. waves
1 to 3 feet. 
.friday...south winds 10 to 15 knots becoming southwest 15 to
20 knots. waves 1 to 3 feet building to 2 to 4 feet. 
.friday night...southwest winds 15 to 25 knots. waves 2 to 4 feet
building to 4 to 7 feet. waves occasionally around 9 feet. 
.saturday...southwest winds 15 to 25 knots becoming northwest and
diminishing to around 10 knots. a chance of snow showers during
the day. waves 4 to 7 feet subsiding to 1 to 3 feet. waves
occasionally around 9 feet. 
.sunday...northwest winds around 10 knots becoming northeast and
increasing to 15 to 20 knots. a chance of snow showers during the
day. waves 1 to 3 feet building to 3 to 5 feet. 
.monday...northeast winds 15 to 25 knots becoming southwest. a
chance of snow showers monday night. waves 2 to 4 feet building
to 3 to 6 feet. 

$$

fzus61 kcle 041418
glfle 
expires:202512042130;;994263

open lake forecast for lake erie
national weather service cleveland oh
918 am est thu dec 4 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 ridge averaging 30.40 inches affects lake erie through friday
night as the embedded high pressure center wobbles east-northeastward
from the iowa area to atlantic waters near nova scotia. on 
saturday, a cold front should sweep generally eastward across lake
erie. behind the front, another ridge averaging 30.50 inches 
should impact lake erie on sunday through the first-half of monday
as the embedded high pressure center moves from the northern 
great plains toward the northeast united states. later on monday 
through this tuesday, the ridge should begin to exit eastward and 
allow a warm front to sweep northeastward across lake erie during 
the second-half of monday. 


lez061-167>169-042130-
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-
918 am est thu dec 4 2025

.rest of today...northwest winds 15 to 25 knots. a chance of snow
showers. waves 4 to 7 feet subsiding to 3 to 6 feet. waves
occasionally around 9 feet. 
.tonight...northwest winds 5 to 15 knots becoming south. a slight
chance of snow showers early. waves 2 to 4 feet subsiding to 1 to
2 feet. 
.friday...south winds 10 to 15 knots becoming southwest 15 to
20 knots. waves 1 to 3 feet building to 2 to 4 feet. 
.friday night...southwest winds 15 to 25 knots. waves 2 to 4 feet
building to 4 to 7 feet. waves occasionally around 9 feet. 
.saturday...southwest winds 15 to 25 knots becoming northwest and
diminishing to 10 to 15 knots. a chance of snow and rain showers.
waves 4 to 7 feet subsiding to 2 to 4 feet. waves occasionally
around 9 feet. 
.sunday...northwest winds around 10 knots becoming northeast and
increasing to 15 to 20 knots. a chance of snow showers during the
day. waves 1 to 3 feet building to 2 to 4 feet. 
.monday...northeast winds 10 to 15 knots becoming south and
increasing to 15 to 25 knots. waves 2 to 4 feet building to 3 to
6 feet. 

$$

fzus63 kdtx 041453
glfsc 
expires:202512042300;;995084

lake st clair forecast
national weather service detroit/pontiac mi
953 am est thu dec 4 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...a strong arctic cold front brings gusty northwest
winds to the central great lakes today. much colder air activates
lake effect snow showers through the late week period.


lcz460-042300-
lake st clair-
953 am est thu dec 4 2025

.rest of today...northwest winds 15 to 20 knots diminishing to 10 to
15 knots late in the afternoon. mostly sunny. waves 2 feet or less.
.tonight...southwest winds 5 to 10 knots increasing to 10 to 15
knots early in the morning. mostly clear. waves 2 feet or less.
.friday...southwest winds 10 to 15 knots. partly sunny. waves 1 to 3
feet.
.friday night...southwest winds 15 to 20 knots. partly cloudy early
in the evening becoming cloudy. waves 1 to 3 feet.
.saturday...southwest winds 15 to 20 knots becoming west 10 to 15
knots in the afternoon...then diminishing to 5 to 10 knots in the
evening. mostly cloudy. waves 2 feet or less.
.sunday...north winds 10 to 15 knots. partly cloudy. a chance of
light snow. waves 2 feet or less.
.monday...south winds 10 to 15 knots. partly cloudy. waves 2 feet or
less.

$$

fzus63 kdtx 041450
glflh 
expires:202512042300;;995011

open lake forecast for lake huron
national weather service detroit/pontiac mi
950 am est thu dec 4 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...a strong arctic cold front brings gusty northwest
winds to the central great lakes today. much colder air activates
lake effect snow showers and is favorable for freezing spray 
through the late week period.


lhz363-462-042300-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
lake huron from port austin to harbor beach beyond 5nm off shore-
950 am est thu dec 4 2025

.rest of today...northwest winds to 30 knots becoming west 15 to
20 knots. freezing spray late in the morning. waves 8 to 12 feet.
waves occasionally around 15 feet. 
.tonight...west winds 10 to 15 knots becoming southwest to
30 knots. waves 3 to 5 feet building to 6 to 9 feet after
midnight. waves occasionally around 12 feet. 
.friday...southwest winds to 30 knots decreasing to 20 to
25 knots early in the afternoon. waves 10 to 14 feet. waves 
occasionally around 18 feet. 
.friday night...southwest winds 20 to 25 knots. snow likely.
waves 8 to 12 feet. waves occasionally around 15 feet. 
.saturday...southwest winds 15 to 20 knots veering to the west
late in the afternoon...then becoming northwest 10 to 15 knots
late in the evening. waves 4 to 6 feet. 
.sunday...northwest winds 10 to 15 knots increasing to 15 to
20 knots early in the evening...then decreasing to 10 to 15 knots
in the late evening and early morning. a chance of snow early in
the morning. waves 4 to 6 feet. waves occasionally around 8 feet.
.monday...northwest winds 10 to 15 knots backing to the west in
the late morning and early afternoon...then becoming southwest
15 to 20 knots early in the evening increasing to 20 to 25 knots
in the late evening and early morning. a chance of. waves 4 to
6 feet. waves occasionally around 8 feet. 


$$

fzus63 kdtx 041450
glflh 
expires:202512042300;;995012

open lake forecast for lake huron
national weather service detroit/pontiac mi
950 am est thu dec 4 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...a strong arctic cold front brings gusty northwest
winds to the central great lakes today. much colder air activates
lake effect snow showers and is favorable for freezing spray 
through the late week period.


lhz463-464-042300-
lake huron from harbor beach to port sanilac beyond 5nm off shore-
lake huron from port sanilac to port huron beyond 5nm off shore-
950 am est thu dec 4 2025

.rest of today...northwest winds 20 to 25 knots with gusts to
around 30 knots becoming west 15 to 20 knots late in the
afternoon. waves 8 to 12 feet. waves occasionally around 15 feet.
.tonight...southwest winds 10 to 15 knots increasing to 20 to
25 knots. waves 3 to 5 feet building to 5 to 7 feet early in the
morning. waves occasionally around 10 feet. 
.friday...southwest winds 20 to 25 knots with gusts to around
30 knots decreasing to 15 to 20 knots early in the afternoon.
waves 5 to 7 feet. waves occasionally around 10 feet. 
.friday night...southwest winds 15 to 20 knots increasing to
20 to 25 knots in the late evening and overnight. a chance of
snow. waves 5 to 7 feet. waves occasionally around 10 feet. 
.saturday...southwest winds 15 to 20 knots becoming west 10 to
15 knots late in the afternoon. a chance of snow and rain. a
chance of snow late in the evening. waves 3 to 5 feet. 
.sunday...northwest winds 10 to 15 knots increasing to 15 to
20 knots early in the evening...then becoming north 10 to
15 knots in the late evening and early morning. a chance of snow.
waves 4 to 6 feet. waves occasionally around 8 feet. 
.monday...north winds 10 to 15 knots veering to the southeast in
the late morning and early afternoon...then veering to the
southwest early in the evening becoming south 15 to 20 knots in
the late evening and early morning. a chance of. waves 3 to
5 feet. 


$$

fzus63 kdtx 041450
glflh 
expires:202512042300;;995010

open lake forecast for lake huron
national weather service detroit/pontiac mi
950 am est thu dec 4 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...a strong arctic cold front brings gusty northwest
winds to the central great lakes today. much colder air activates
lake effect snow showers and is favorable for freezing spray 
through the late week period.


lhz361-362-042300-
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-
950 am est thu dec 4 2025

.rest of today...northwest winds 20 to 25 knots with gusts to
around 30 knots becoming west 15 to 20 knots with gusts to around
30 knots in the afternoon. a chance of snow showers late in the
morning. freezing spray. waves 8 to 12 feet. waves occasionally
around 15 feet. 
.tonight...southwest winds 10 to 15 knots increasing to 30 knots.
waves 5 to 7 feet building to 8 to 12 feet early in the morning.
waves occasionally around 15 feet. 
.friday...southwest winds to 30 knots decreasing to 15 to 20 
knots. a chance of snow. waves 10 to 14 feet. waves occasionally 
around 18 feet. 
.friday night...southwest winds 15 to 20 knots. snow likely in
the evening...then a chance of snow after midnight. waves 8 to
12 feet. waves occasionally around 15 feet. 
.saturday...west winds 15 to 20 knots veering to the northwest
late in the afternoon...then decreasing to 10 to 15 knots late in
the evening. a chance of snow in the morning. waves 4 to 6 feet. 
.sunday...northwest winds 10 to 15 knots increasing to northwest
15 to 20 knots early in the evening...then decreasing to 10 to
15 knots in the late evening and early morning. waves 3 to
5 feet. waves occasionally around 8 feet. 
.monday...west winds 10 to 15 knots becoming southwest 15 to
20 knots until early morning. a chance of snow in the late
evening and early morning. waves 3 to 5 feet building to 5 to
7 feet in the late evening and early morning. waves occasionally
around 10 feet. 


$$

fzus63 kmkx 041443
glflm 
expires:202512042215;;994912

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
843 am cst thu dec 4 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...

breezy northwest winds will continue through the morning, 
especially across the eastern half of the lake. moderate freezing
spray will remain a concern for the next few hours across the 
eastern half of the lake as well. high pressure of 30.4 inches 
will move across iowa and then through northern illinois and 
indiana today, shifting winds to a southwesterly direction by 
tonight.

winds will increase this evening to gale force over the northern
half of the lake as an area of low pressure around 29.7 inches 
moves across southwestern ontario. a gale warning is in effect 
from late this evening through mid morning friday. freezing spray 
is also expected during this time. 

a cold front will drape across the open waters friday into friday
night, bringing lighter westerly winds. winds shift to become
northwesterly into saturday as low pressure exits to the east,
continuing through sunday before high pressure builds over the
lake sunday night into monday and brings light and variable winds.


lmz080-669-671-673-675-777-779-870-872-874-876-878-042215-
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-
843 am cst thu dec 4 2025

sheboygan wi to pentwater mi south...

.rest of today...northwest winds 10 to 20 kt diminishing to 5 to
10 kt early this afternoon, then becoming southwest 10 to 15 kt
late. waves 5 to 8 ft occasionally to 10 ft subsiding to 2 to
4 ft. 
.tonight...southwest winds 10 to 20 kt increasing to 30 kt. waves
2 to 4 ft building to 8 to 11 ft occasionally to 14 ft. 
.friday...southwest winds to 30 kt. chance of snow in the
afternoon. waves 8 to 12 ft occasionally to 16 ft subsiding to
8 to 11 ft occasionally to 14 ft. 
.friday night...southwest winds to 30 kt becoming west 15 to
25 kt. snow in the evening. waves 7 to 10 ft occasionally to
13 ft. 
.saturday...northwest winds 15 to 25 kt diminishing to 10 to
20 kt. chance of rain and snow in the morning. waves 5 to 8 ft
occasionally to 10 ft subsiding to 4 to 6 ft occasionally to
8 ft. 
.saturday night...northwest winds 10 to 15 kt becoming north
10 to 20 kt. chance of snow. waves 3 to 5 ft. 
.sunday...north winds 10 to 20 kt. chance of snow. waves 4 to
6 ft occasionally to 8 ft. 
.monday...south winds 10 to 20 kt becoming southwest 15 to 25 kt.
waves 3 to 5 ft building to 4 to 7 ft occasionally to 9 ft.  

$$

fzus63 kmkx 041443
glflm 
expires:202512042215;;994911

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
843 am cst thu dec 4 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...

breezy northwest winds will continue through the morning, 
especially across the eastern half of the lake. moderate freezing
spray will remain a concern for the next few hours across the 
eastern half of the lake as well. high pressure of 30.4 inches 
will move across iowa and then through northern illinois and 
indiana today, shifting winds to a southwesterly direction by 
tonight.

winds will increase this evening to gale force over the northern
half of the lake as an area of low pressure around 29.7 inches 
moves across southwestern ontario. a gale warning is in effect 
from late this evening through mid morning friday. freezing spray 
is also expected during this time. 

a cold front will drape across the open waters friday into friday
night, bringing lighter westerly winds. winds shift to become
northwesterly into saturday as low pressure exits to the east,
continuing through sunday before high pressure builds over the
lake sunday night into monday and brings light and variable winds.


lmz261-362-364-366-563-565-567-868-042215-
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-
843 am cst thu dec 4 2025

sheboygan wi to pentwater mi north...

...gale warning in effect from this evening through friday
morning...

.rest of today...northwest winds to 30 kt diminishing to 15 to
25 kt late this morning, then becoming west 10 to 20 kt early
this afternoon becoming southwest late. waves 4 to 7 ft
occasionally to 9 ft subsiding to 1 to 3 ft. 
.tonight...southwest winds to 30 kt increasing to gales to 40 kt.
chance of snow overnight. waves 4 to 6 ft occasionally to 8 ft
building to 10 to 14 ft occasionally to 18 ft. 
.friday...southwest gales to 40 kt diminishing to 30 kt. chance
of snow in the morning, then snow likely in the afternoon. waves
10 to 14 ft occasionally to 18 ft subsiding to 7 to 10 ft
occasionally to 13 ft. 
.friday night...southwest winds to 30 kt becoming west. snow in
the evening. waves 6 to 9 ft occasionally to 12 ft. 
.saturday...northwest winds 15 to 25 kt. waves 4 to 6 ft
occasionally to 8 ft subsiding to 3 to 5 ft. 
.saturday night...northwest winds 10 to 20 kt. waves 2 to 4 ft. 
.sunday...northwest winds 10 to 20 kt becoming north. waves 2 to
4 ft. 
.monday...southwest winds 10 to 20 kt increasing to 15 to 25 kt.
chance of snow. waves 2 to 4 ft building to 4 to 7 ft
occasionally to 9 ft.  

$$

fzus63 kmqt 041501
glfls 
expires:202512042100;;995538

open lake forecast for lake superior
national weather service marquette mi
1000 am est thu dec 4 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...

30.5 inch high pressure over iowa this morning will shift east to 
the lower great lakes through thursday evening, sending a 30.2 inch 
ridge over lake superior. meanwhile, a 29.7 inch low will move over 
lake winnipeg this afternoon before passing north of lake superior 
overnight into friday. another 29.6 inch trough will pass over the 
lake friday night, extending from a 29.4 inch low over hudson bay. 
as the trough shifts east, another 30.4 inch high builds over the 
northern plains and shifts east across the great lakes through the 
weekend ahead of the next clipper low arriving over lake superior at 
around 29.6 inches on monday and into tuesday morning.



lsz267-042100-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
1000 am est thu dec 4 2025

...gale warning in effect from 7 pm est this evening through
friday morning...

.rest of today...northwest winds 20 to 30 knots backing southwest
by mid afternoon. freezing spray. a chance of snow showers. waves
9 to 12 feet occasionally to 15 feet subsiding to 3 to 6 feet
occasionally to 8 feet. 
.tonight...southwest gales to 45 knots. freezing spray. a chance
of snow showers in the evening. snow showers after midnight.
waves building to 10 to 14 feet occasionally to 18 feet, then
subsiding to 7 to 10 feet occasionally to 13 feet. 
.friday...southwest winds 20 to 30 knots diminishing to 15 to
25 knots. snow showers likely. waves subsiding to 3 to 5 feet
occasionally to 7 feet. 
.friday night...southwest winds 15 to 25 knots becoming west
20 to 30 knots after midnight. snow showers. waves subsiding to
2 to 4 feet, then building to 6 to 9 feet occasionally to
11 feet. 
.saturday...northwest gales to 35 knots diminishing to 20 to
30 knots in the afternoon. freezing spray. snow showers. waves
building to 8 to 11 feet occasionally to 14 feet, then subsiding
to 6 to 9 feet occasionally to 11 feet. 
.saturday night...northwest winds 15 to 25 knots. snow showers.
waves subsiding to 3 to 6 feet occasionally to 8 feet. 
.sunday...northwest winds 15 to 25 knots backing west. snow
showers likely, then a chance of snow showers. waves subsiding to
3 to 5 feet occasionally to 7 feet. 
.monday...southwest winds 15 to 25 knots increasing to 20 to
30 knots. a chance of snow showers, then snow showers likely.
waves subsiding to 2 to 4 feet, then building to 3 to 6 feet
occasionally to 8 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 041501
glfls 
expires:202512042100;;995533

open lake forecast for lake superior
national weather service marquette mi
1000 am est thu dec 4 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...

30.5 inch high pressure over iowa this morning will shift east to 
the lower great lakes through thursday evening, sending a 30.2 inch 
ridge over lake superior. meanwhile, a 29.7 inch low will move over 
lake winnipeg this afternoon before passing north of lake superior 
overnight into friday. another 29.6 inch trough will pass over the 
lake friday night, extending from a 29.4 inch low over hudson bay. 
as the trough shifts east, another 30.4 inch high builds over the 
northern plains and shifts east across the great lakes through the 
weekend ahead of the next clipper low arriving over lake superior at 
around 29.6 inches on monday and into tuesday morning.



lsz162-042100-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 am est thu dec 4 2025 /900 am cst thu dec 4 2025/

...gale warning in effect from 4 pm est /3 pm cst/ this afternoon
through late tonight...

.rest of today...southwest winds 15 to 25 knots increasing to
gales to 35 knots. freezing spray in the afternoon. a slight
chance of snow showers in the afternoon. waves 1 to 3 feet
building to 7 to 10 feet occasionally to 13 feet. 
.tonight...southwest gales to 40 knots becoming west 20 to
30 knots late. freezing spray. a chance of snow showers. waves
building to 10 to 14 feet occasionally to 18 feet, then subsiding
to 4 to 7 feet occasionally to 9 feet. 
.friday...west winds 10 to 20 knots. a chance of snow showers.
waves subsiding to calm to 2 feet. 
.friday night...northwest winds 15 to 25 knots. a slight chance
of snow showers. waves building to 2 to 4 feet. 
.saturday...northwest winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon. waves subsiding to calm to 2 feet. 
.saturday night...northwest winds 10 to 20 knots. waves calm to
2 feet. 
.sunday...northwest winds 10 to 20 knots becoming west 5 to
15 knots. waves calm to 2 feet. 
.monday...southwest winds 10 to 20 knots. a chance of snow
showers. waves building to 1 to 3 feet, then subsiding to calm to
2 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 041501
glfls 
expires:202512042100;;995534

open lake forecast for lake superior
national weather service marquette mi
1000 am est thu dec 4 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...

30.5 inch high pressure over iowa this morning will shift east to 
the lower great lakes through thursday evening, sending a 30.2 inch 
ridge over lake superior. meanwhile, a 29.7 inch low will move over 
lake winnipeg this afternoon before passing north of lake superior 
overnight into friday. another 29.6 inch trough will pass over the 
lake friday night, extending from a 29.4 inch low over hudson bay. 
as the trough shifts east, another 30.4 inch high builds over the 
northern plains and shifts east across the great lakes through the 
weekend ahead of the next clipper low arriving over lake superior at 
around 29.6 inches on monday and into tuesday morning.



lsz263-042100-
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 thu dec 4 2025

...gale warning in effect from 4 pm est this afternoon through
late tonight...

.rest of today...west winds 10 to 20 knots becoming southwest
20 to 30 knots by late morning, then increasing to gales to
35 knots by mid afternoon. a slight chance of snow showers.
freezing spray in the afternoon. waves 2 to 4 feet building to
7 to 10 feet occasionally to 13 feet. 
.tonight...southwest gales to 40 knots becoming west gales to
35 knots late. freezing spray in the evening. snow showers in the
evening, then a chance of snow showers after midnight. waves
building to 10 to 14 feet occasionally to 18 feet, then subsiding
to 7 to 10 feet occasionally to 13 feet. 
.friday...west winds 15 to 25 knots diminishing to 10 to
20 knots. a chance of snow showers. waves subsiding to 2 to
4 feet. 
.friday night...west winds 15 to 25 knots becoming northwest
20 to 30 knots after midnight. a chance of snow showers. waves
building to 4 to 7 feet occasionally to 9 feet. 
.saturday...northwest winds 20 to 30 knots diminishing to 15 to
25 knots in the afternoon. freezing spray in the morning. waves
building to 5 to 8 feet occasionally to 10 feet, then subsiding
to 2 to 4 feet. 
.saturday night...northwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. waves 2 to 4 feet. 
.sunday...northwest winds 10 to 20 knots backing west. waves
subsiding to calm to 2 feet, then building to 1 to 3 feet. 
.monday...southwest winds 15 to 25 knots. a chance of snow
showers. waves building to 2 to 4 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 041501
glfls 
expires:202512042100;;995535

open lake forecast for lake superior
national weather service marquette mi
1000 am est thu dec 4 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...

30.5 inch high pressure over iowa this morning will shift east to 
the lower great lakes through thursday evening, sending a 30.2 inch 
ridge over lake superior. meanwhile, a 29.7 inch low will move over 
lake winnipeg this afternoon before passing north of lake superior 
overnight into friday. another 29.6 inch trough will pass over the 
lake friday night, extending from a 29.4 inch low over hudson bay. 
as the trough shifts east, another 30.4 inch high builds over the 
northern plains and shifts east across the great lakes through the 
weekend ahead of the next clipper low arriving over lake superior at 
around 29.6 inches on monday and into tuesday morning.



lsz264-042100-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
1000 am est thu dec 4 2025

...gale warning in effect from 7 pm est this evening through
friday morning...

.rest of today...northwest winds 10 to 20 knots becoming west
20 to 30 knots by late morning, then becoming southwest gales to
35 knots by mid afternoon. freezing spray in the afternoon. a
chance of snow showers in the afternoon. waves 4 to 7 feet
occasionally to 9 feet subsiding to 2 to 4 feet, then building to
6 to 9 feet occasionally to 11 feet. 
.tonight...southwest gales to 35 knots veering west late.
freezing spray in the evening. snow showers. waves building to
10 to 14 feet occasionally to 18 feet, then subsiding to 8 to
11 feet occasionally to 14 feet. 
.friday...west winds 15 to 25 knots diminishing to 10 to
20 knots. a chance of snow showers. waves subsiding to 2 to
4 feet. 
.friday night...west winds 15 to 25 knots becoming northwest
20 to 30 knots after midnight. a chance of snow showers. freezing
spray after midnight. waves building to 5 to 8 feet occasionally
to 10 feet. 
.saturday...northwest winds 20 to 30 knots. freezing spray. a
slight chance of snow showers. waves building to 6 to 9 feet
occasionally to 11 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet. 
.saturday night...northwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. freezing spray in the evening.
waves subsiding to 3 to 6 feet occasionally to 8 feet. 
.sunday...northwest winds 10 to 20 knots backing west. waves
subsiding to 1 to 3 feet. 
.monday...southwest winds 15 to 25 knots diminishing to 10 to
20 knots. a chance of snow showers. waves building to 3 to 5 feet
occasionally to 7 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 041501
glfls 
expires:202512042100;;995536

open lake forecast for lake superior
national weather service marquette mi
1000 am est thu dec 4 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...

30.5 inch high pressure over iowa this morning will shift east to 
the lower great lakes through thursday evening, sending a 30.2 inch 
ridge over lake superior. meanwhile, a 29.7 inch low will move over 
lake winnipeg this afternoon before passing north of lake superior 
overnight into friday. another 29.6 inch trough will pass over the 
lake friday night, extending from a 29.4 inch low over hudson bay. 
as the trough shifts east, another 30.4 inch high builds over the 
northern plains and shifts east across the great lakes through the 
weekend ahead of the next clipper low arriving over lake superior at 
around 29.6 inches on monday and into tuesday morning.



lsz265-042100-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
1000 am est thu dec 4 2025

...gale warning in effect from 7 pm est this evening through
friday morning...

.rest of today...northwest winds 15 to 25 knots backing west by
late morning, then becoming southwest 20 to 30 knots by mid
afternoon. freezing spray late in the morning. a chance of snow
showers. waves 5 to 8 feet occasionally to 10 feet subsiding to
2 to 4 feet, then building to 3 to 5 feet occasionally to 7 feet.
.tonight...southwest gales to 35 knots becoming west 20 to
30 knots late. freezing spray. a chance of snow showers. waves
building to 4 to 8 feet occasionally to 10 feet. 
.friday...west winds 20 to 30 knots becoming southwest 15 to
25 knots. a chance of snow showers. waves subsiding to calm to
2 feet. 
.friday night...west winds 15 to 25 knots becoming northwest
gales to 35 knots after midnight. snow showers likely in the
evening, then a chance of snow showers after midnight. waves
building to 4 to 7 feet occasionally to 9 feet. 
.saturday...northwest gales to 35 knots diminishing to 20 to
30 knots in the afternoon. freezing spray in the morning. a
chance of snow showers. waves subsiding to 3 to 5 feet
occasionally to 7 feet. 
.saturday night...northwest winds 20 to 30 knots diminishing to
15 to 25 knots after midnight. a chance of snow showers. waves
subsiding to 2 to 4 feet. 
.sunday...northwest winds 20 to 30 knots becoming west 10 to
20 knots. waves subsiding to calm to 2 feet. 
.monday...southwest winds 10 to 20 knots increasing to 15 to
25 knots. a chance of snow showers. waves building to 1 to
3 feet, then subsiding to calm to 2 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 041501
glfls 
expires:202512042100;;995537

open lake forecast for lake superior
national weather service marquette mi
1000 am est thu dec 4 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...

30.5 inch high pressure over iowa this morning will shift east to 
the lower great lakes through thursday evening, sending a 30.2 inch 
ridge over lake superior. meanwhile, a 29.7 inch low will move over 
lake winnipeg this afternoon before passing north of lake superior 
overnight into friday. another 29.6 inch trough will pass over the 
lake friday night, extending from a 29.4 inch low over hudson bay. 
as the trough shifts east, another 30.4 inch high builds over the 
northern plains and shifts east across the great lakes through the 
weekend ahead of the next clipper low arriving over lake superior at 
around 29.6 inches on monday and into tuesday morning.



lsz266-042100-
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 thu dec 4 2025

...gale warning in effect from 7 pm est this evening through
friday morning...

.rest of today...northwest gales to 35 knots diminishing to 15 to
25 knots by late morning, then becoming southwest 20 to 30 knots
by mid afternoon. freezing spray late in the morning. a chance of
snow showers. waves 9 to 12 feet occasionally to 15 feet
subsiding to 3 to 6 feet occasionally to 8 feet, then building to
4 to 7 feet occasionally to 9 feet. 
.tonight...southwest gales to 40 knots. freezing spray. snow
showers. waves building to 10 to 14 feet occasionally to 18 feet,
then subsiding to 9 to 12 feet occasionally to 15 feet. 
.friday...west winds 15 to 25 knots backing southwest. a chance
of snow showers. waves subsiding to 3 to 5 feet occasionally to
7 feet. 
.friday night...west winds 15 to 25 knots becoming northwest
20 to 30 knots after midnight. snow showers. waves subsiding to
2 to 4 feet, then building to 6 to 9 feet occasionally to
11 feet. 
.saturday...northwest gales to 35 knots diminishing to 20 to
30 knots in the afternoon. freezing spray. snow showers in the
morning. a chance of snow showers in the afternoon. waves
building to 8 to 11 feet occasionally to 14 feet, then subsiding
to 6 to 9 feet occasionally to 11 feet. 
.saturday night...northwest winds 15 to 25 knots. freezing spray.
a chance of snow showers. waves subsiding to 3 to 6 feet
occasionally to 8 feet. 
.sunday...northwest winds 15 to 25 knots backing west. freezing
spray. a chance of snow showers. waves subsiding to 2 to 4 feet. 
.monday...southwest winds 15 to 25 knots. a chance of snow
showers. waves building to 3 to 6 feet occasionally to 8 feet. 

note, wave height forecasts are for ice free areas.

$$