fzus61 kbuf 180302
glflo 
expires:202512181000;;773159

open lake forecast for lake ontario
national weather service buffalo ny
1002 pm est wed dec 17 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 29.1 inch low near lake superior thursday will deepen 
to 28.9 inches while moving to central quebec by friday, with its 
trailing strong cold front crossing the lake early friday morning. 
in its wake, a 30.1 inch high will slowly build across the lake 
friday night and early saturday, then will drift off the atlantic 
coastline later saturday and saturday night, with a 29.5 inch low 
moving across ontario and quebec and pushing its attendant cold 
front across the lake sunday. a large 30.6 inch high will then build 
east across the lake monday.


loz062-181000-
lake ontario open waters from the niagara river to hamlin beach-
1002 pm est wed dec 17 2025

...gale watch in effect from thursday evening through late friday
night...

.overnight...southwest winds 10 to 15 knots becoming south.
waves 2 to 4 feet subsiding to 1 to 3 feet. 
.thursday...south winds 10 to 15 knots increasing to 15 to
25 knots. waves 1 to 3 feet building to 3 to 5 feet. 
.thursday night...south winds to 30 knots becoming southwest.
showers. waves 3 to 6 feet building to 6 to 9 feet. waves
occasionally around 11 feet. 
.friday...southwest winds to 30 knots becoming west and
increasing to 40 knot gales in the afternoon. snow likely with
rain showers in the morning, then snow likely in the afternoon.
waves 8 to 11 feet building to 12 to 16 feet. waves occasionally
around 20 feet. 
.friday night...west gales to 35 knots diminishing to 15 to
20 knots. a chance of snow showers in the evening. waves 12 to
16 feet subsiding to 4 to 7 feet. waves occasionally around
20 feet. 
.saturday...southwest winds 15 to 25 knots becoming west to
30 knots. a chance of rain and snow showers. waves 3 to 5 feet
building to 7 to 10 feet. waves occasionally around 13 feet. 
.sunday...west gales to 35 knots becoming northwest and
diminishing to 15 to 20 knots. a chance of snow showers during
the day. waves 9 to 12 feet subsiding to 4 to 7 feet. waves
occasionally around 15 feet. 
.monday...northwest winds 10 to 15 knots becoming south. a chance
of rain and snow monday night. waves 2 to 4 feet subsiding to
1 to 2 feet. 

$$

fzus61 kbuf 180302
glflo 
expires:202512181000;;773161

open lake forecast for lake ontario
national weather service buffalo ny
1002 pm est wed dec 17 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 29.1 inch low near lake superior thursday will deepen 
to 28.9 inches while moving to central quebec by friday, with its 
trailing strong cold front crossing the lake early friday morning. 
in its wake, a 30.1 inch high will slowly build across the lake 
friday night and early saturday, then will drift off the atlantic 
coastline later saturday and saturday night, with a 29.5 inch low 
moving across ontario and quebec and pushing its attendant cold 
front across the lake sunday. a large 30.6 inch high will then build 
east across the lake monday.


loz064-065-181000-
lake ontario open waters from sodus bay to the saint lawrence
river-
1002 pm est wed dec 17 2025

...gale watch in effect from thursday evening through late friday
night...

.overnight...west winds 15 to 20 knots becoming south.
waves 4 to 7 feet subsiding to 2 to 4 feet. waves occasionally
around 9 feet. 
.thursday...south winds to 30 knots. waves 3 to 5 feet building
to 6 to 9 feet. waves occasionally around 11 feet. 
.thursday night...south gales to 35 knots. showers. waves 7 to
10 feet. waves occasionally around 13 feet. 
.friday...southwest winds to 30 knots becoming west and
increasing to 45 knot gales in the afternoon. rain and snow in
the morning, then snow in the afternoon. waves 7 to 10 feet
building to 15 to 20 feet. waves occasionally around 26 feet. 
.friday night...west gales to 45 knots becoming northwest and
diminishing to 15 to 25 knots overnight. snow in the evening,
then snow showers likely overnight. waves 16 to 21 feet subsiding
to 8 to 11 feet. waves occasionally around 27 feet. 
.saturday...west winds 10 to 15 knots becoming southwest and
increasing to 30 knots. a chance of snow showers during the day,
then rain and snow showers likely saturday night. waves 4 to
7 feet building to 8 to 11 feet. waves occasionally around
14 feet. 
.sunday...west gales to 40 knots becoming northwest and
diminishing to 15 to 25 knots. snow and rain showers likely
during the day, then a chance of snow showers sunday night. waves
11 to 16 feet subsiding to 7 to 10 feet. waves occasionally
around 20 feet. 
.monday...northwest winds 15 to 20 knots becoming south. a chance
of snow monday night. waves 3 to 6 feet subsiding to 2 to 4 feet.

$$

fzus61 kbuf 180302
glflo 
expires:202512181000;;773160

open lake forecast for lake ontario
national weather service buffalo ny
1002 pm est wed dec 17 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 29.1 inch low near lake superior thursday will deepen 
to 28.9 inches while moving to central quebec by friday, with its 
trailing strong cold front crossing the lake early friday morning. 
in its wake, a 30.1 inch high will slowly build across the lake 
friday night and early saturday, then will drift off the atlantic 
coastline later saturday and saturday night, with a 29.5 inch low 
moving across ontario and quebec and pushing its attendant cold 
front across the lake sunday. a large 30.6 inch high will then build 
east across the lake monday.


loz063-181000-
lake ontario open waters from hamlin beach to sodus bay-
1002 pm est wed dec 17 2025

...gale watch in effect from thursday evening through late friday
night...

.overnight...west winds 15 to 20 knots becoming south.
waves 3 to 6 feet subsiding to 2 to 4 feet. 
.thursday...south winds 15 to 25 knots increasing to 30 knots.
waves 3 to 6 feet building to 5 to 8 feet. waves occasionally
around 10 feet. 
.thursday night...south winds to 30 knots. showers. waves 5 to
9 feet. waves occasionally around 11 feet. 
.friday...southwest winds to 30 knots becoming west and
increasing to 40 knot gales. rain showers with snow likely in the
morning, then snow likely in the afternoon. waves 7 to 10 feet
building to 15 to 19 feet. waves occasionally around 24 feet. 
.friday night...west gales to 40 knots diminishing to 15 to
20 knots. a chance of snow showers. waves 14 to 19 feet subsiding
to 7 to 10 feet. waves occasionally around 24 feet. 
.saturday...southwest winds 10 to 15 knots becoming west and
increasing to 30 knots. a chance of rain and snow showers. waves
4 to 7 feet building to 8 to 11 feet. waves occasionally around
14 feet. 
.sunday...west gales to 40 knots becoming northwest and
diminishing to 20 to 25 knots. a chance of snow showers. waves
11 to 16 feet subsiding to 7 to 10 feet. waves occasionally
around 20 feet. 
.monday...northwest winds 15 to 20 knots becoming south. a chance
of rain and snow monday night. waves 3 to 6 feet subsiding to
1 to 3 feet. 

$$

fzus61 kcle 180200
glfle 
expires:202512180900;;770528

open lake forecast for lake erie
national weather service cleveland oh
900 pm est wed dec 17 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...
ridge of high pressure averaging 30.10 inches will quickly build 
in and allow winds to subside tonight. a surface low 28.50 inches
will track east thursday night. this low track will drag a strong
cold front eastward across lake erie thursday night. a trough 
averaging 30.00 inches should linger over lake erie on friday as 
a ridge attempts to build from the upper midwest. this ridge, 
averaging 30.20 inches, should abate winds across lake erie 
friday night and early saturday. during saturday night, a cold 
front should sweep eastward across lake erie. behind the front, a 
ridge averaging 30.30 inches should build from the upper midwest 
through sunday.


lez061-168-169-180900-
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-
900 pm est wed dec 17 2025

...gale watch in effect from thursday evening through friday
evening...

.overnight...south winds 10 to 15 knots. waves 2 to 4 feet
subsiding to 1 to 3 feet. 
.thursday...south winds 15 to 25 knots increasing to 30 knots. a
slight chance of rain early in the afternoon. a chance of rain
late. waves 2 to 4 feet building to 5 to 8 feet. waves
occasionally around 10 feet. 
.thursday night...south winds to 30 knots becoming southwest.
rain in the evening, then rain and snow overnight. waves 6 to
9 feet building to 10 to 13 feet. waves occasionally around
16 feet. 
.friday...southwest gales to 35 knots becoming west. snow and
rain in the morning, then a chance of snow in the afternoon.
waves 10 to 15 feet building to 12 to 16 feet. waves occasionally
around 20 feet. 
.friday night...west gales to 35 knots becoming southwest and
diminishing to 15 to 25 knots overnight. waves 10 to 14 feet
subsiding to 5 to 8 feet. waves occasionally around 18 feet. 
.saturday...south winds 15 to 25 knots becoming west to 30 knots.
a chance of rain saturday night. waves 3 to 5 feet building to
6 to 10 feet. waves occasionally around 13 feet. 
.sunday...west winds to 30 knots becoming northwest 15 to
25 knots. waves 6 to 10 feet subsiding to 3 to 5 feet. waves
occasionally around 13 feet. 
.monday...west winds 10 to 15 knots becoming south 15 to
20 knots. waves 1 to 3 feet. 

$$

fzus61 kcle 180200
glfle 
expires:202512180900;;770527

open lake forecast for lake erie
national weather service cleveland oh
900 pm est wed dec 17 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...
ridge of high pressure averaging 30.10 inches will quickly build 
in and allow winds to subside tonight. a surface low 28.50 inches
will track east thursday night. this low track will drag a strong
cold front eastward across lake erie thursday night. a trough 
averaging 30.00 inches should linger over lake erie on friday as 
a ridge attempts to build from the upper midwest. this ridge, 
averaging 30.20 inches, should abate winds across lake erie 
friday night and early saturday. during saturday night, a cold 
front should sweep eastward across lake erie. behind the front, a 
ridge averaging 30.30 inches should build from the upper midwest 
through sunday.


lez165>167-180900-
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-
900 pm est wed dec 17 2025

...gale watch in effect from thursday evening through friday
evening...

.overnight...south winds 10 to 15 knots increasing to 15 to
20 knots. waves 1 to 3 feet building to 3 to 5 feet. 
.thursday...south winds 15 to 25 knots increasing to 30 knots. a
slight chance of rain in the morning, then a chance of rain early
in the afternoon. rain likely late. waves 3 to 6 feet building to
5 to 8 feet. waves occasionally around 10 feet. 
.thursday night...south winds to 30 knots becoming southwest and
increasing to 35 knot gales overnight. rain in the evening, then
rain likely with a chance of snow overnight. waves 6 to 10 feet
building to 10 to 13 feet. waves occasionally around 16 feet. 
.friday...west gales to 35 knots. a chance of snow in the
morning. waves 10 to 14 feet. waves occasionally around 18 feet. 
.friday night...west gales to 35 knots becoming southwest and
diminishing to 15 to 20 knots overnight. waves 9 to 12 feet
subsiding to 3 to 5 feet. waves occasionally around 15 feet. 
.saturday...south winds to 30 knots becoming west. waves 5 to
8 feet building to 6 to 9 feet. waves occasionally around
11 feet. 
.sunday...west winds to 30 knots becoming northwest 15 to
25 knots. waves 5 to 9 feet subsiding to 2 to 4 feet. waves
occasionally around 11 feet. 
.monday...west winds 10 to 15 knots becoming south and increasing
to 15 to 25 knots. waves 1 to 3 feet building to 2 to 4 feet. 

$$

fzus61 kcle 180200
glfle 
expires:202512180900;;770526

open lake forecast for lake erie
national weather service cleveland oh
900 pm est wed dec 17 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...
ridge of high pressure averaging 30.10 inches will quickly build 
in and allow winds to subside tonight. a surface low 28.50 inches
will track east thursday night. this low track will drag a strong
cold front eastward across lake erie thursday night. a trough 
averaging 30.00 inches should linger over lake erie on friday as 
a ridge attempts to build from the upper midwest. this ridge, 
averaging 30.20 inches, should abate winds across lake erie 
friday night and early saturday. during saturday night, a cold 
front should sweep eastward across lake erie. behind the front, a 
ridge averaging 30.30 inches should build from the upper midwest 
through sunday.


lez162-163-180900-
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-
900 pm est wed dec 17 2025

.overnight...southeast winds 5 to 10 knots becoming south
and increasing to 15 to 20 knots. waves in ice free areas 1 to
3 feet. 
.thursday...south winds to 30 knots. a chance of rain in the
morning, then rain in the afternoon. waves 2 to 4 feet building
to 3 to 5 feet. 
.thursday night...south winds to 30 knots becoming west. rain in
the evening, then a chance of snow and rain overnight. waves 3 to
5 feet subsiding to 2 to 4 feet. 
.friday...west winds to 30 knots. waves 2 to 4 feet. 
.friday night...west winds 15 to 25 knots becoming south 15 to
20 knots. waves 1 to 3 feet. 
.saturday...south winds 15 to 20 knots becoming west. waves 1 to
3 feet. 
.sunday...west winds 15 to 20 knots diminishing to 10 to
15 knots. waves 2 feet or less. 
.monday...southwest winds 5 to 10 knots becoming south and
increasing to 15 to 20 knots. waves 2 feet or less. 

wave heights are for ice free areas.

$$

fzus61 kcle 180200
glfle 
expires:202512180900;;770525

open lake forecast for lake erie
national weather service cleveland oh
900 pm est wed dec 17 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...
ridge of high pressure averaging 30.10 inches will quickly build 
in and allow winds to subside tonight. a surface low 28.50 inches
will track east thursday night. this low track will drag a strong
cold front eastward across lake erie thursday night. a trough 
averaging 30.00 inches should linger over lake erie on friday as 
a ridge attempts to build from the upper midwest. this ridge, 
averaging 30.20 inches, should abate winds across lake erie 
friday night and early saturday. during saturday night, a cold 
front should sweep eastward across lake erie. behind the front, a 
ridge averaging 30.30 inches should build from the upper midwest 
through sunday.


lez164-180900-
the islands to vermilion oh beyond 5 nm off shoreline to us-
canadian border-
900 pm est wed dec 17 2025

...gale watch in effect from thursday evening through friday
evening...

.overnight...southeast winds 5 to 15 knots becoming south
15 to 20 knots. waves 2 feet or less building to 2 to 3 feet. 
.thursday...south winds to 30 knots. a slight chance of rain
early, then a chance of rain. rain late. waves 2 to 4 feet
building to 5 to 7 feet. waves occasionally around 9 feet. 
.thursday night...south winds to 30 knots becoming southwest and
increasing to 35 knot gales overnight. rain in the evening, then
a chance of rain and snow overnight. waves 5 to 8 feet. waves
occasionally around 10 feet. 
.friday...west gales to 35 knots. a chance of snow in the
morning. waves 5 to 9 feet. waves occasionally around 11 feet. 
.friday night...west winds to 30 knots becoming southwest and
diminishing to 15 to 20 knots. waves 3 to 6 feet subsiding to
1 to 3 feet. 
.saturday...south winds 20 to 25 knots becoming west. waves 3 to
5 feet. 
.sunday...west winds 15 to 25 knots diminishing to 10 to
15 knots. waves 3 to 5 feet subsiding to 1 foot or less. 
.monday...southwest winds 5 to 10 knots becoming south and
increasing to 15 to 20 knots. waves 1 to 3 feet. 

$$

fzus63 kdtx 180207
glfsc 
expires:202512181015;;770946

lake st clair forecast
national weather service detroit/pontiac mi
907 pm est wed dec 17 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...low pressure, 29.10 inches, tracks toward lake
superior thursday and draws a cold front across the southern 
great lakes thursday evening. southerly winds increase thursday 
ahead of the front before shifting to the northwest friday behind 
the front. gale force gusts are possible today and friday, with 
snow squalls possible on friday.


lcz460-181015-
lake st clair-
907 pm est wed dec 17 2025

...small craft advisory in effect from 7 am est thursday through
friday evening...

.rest of tonight...south winds 10 to 15 knots. partly cloudy.
.thursday...south winds 15 to 20 knots increasing to 20 to 25 knots
with gusts to 30 knots in the afternoon. a chance of light rain in
the morning...then rain in the afternoon.
.thursday night...south winds 20 to 25 knots with gusts to 30 knots
becoming southwest 15 to 20 knots in the late evening and early
morning...then becoming west 20 to 25 knots with gusts to 30 knots
after midnight. light rain until early morning. a chance of light
snow in the late evening and overnight.
.friday...west winds 20 to 25 knots with gusts to 30 knots. mostly
cloudy. a chance of light snow until late afternoon.
.friday night...west winds 15 to 20 knots diminishing to 10 to 15
knots in the late evening and early morning...then becoming
southwest 15 to 20 knots after midnight. mostly cloudy.
.saturday...south winds 15 to 20 knots veering to the southwest in
the evening. mostly cloudy.
.sunday...northwest winds 15 to 20 knots. partly cloudy.
.monday...south winds 10 to 15 knots. partly cloudy.

waves omitted due to ice coverage.

$$

fzus63 kdtx 180206
glflh 
expires:202512181015;;770937

open lake forecast for lake huron
national weather service detroit/pontiac mi
906 pm est wed dec 17 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...low pressure, 29.10 inches, tracks toward lake
superior thursday and draws a cold front across the southern 
great lakes thursday evening. southerly winds increase thursday 
ahead of the front before shifting to the northwest friday behind 
the front. gale force gusts are possible today and friday, with 
snow squalls possible on friday.


lhz361>363-462-181015-
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-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
lake huron from port austin to harbor beach beyond 5nm off shore-
906 pm est wed dec 17 2025

...gale warning in effect through friday evening...

.rest of tonight...south winds 15 to 20 knots increasing to 20 to
25 knots with gusts to 35 knot gales after midnight. waves 3 to
5 feet building to 8 to 12 feet after midnight. waves
occasionally around 15 feet. 
.thursday...south winds to 30 knots with gusts to 40 knot gales.
a chance of rain in the morning...then rain in the afternoon.
waves 12 to 16 feet. waves occasionally around 20 feet. 
.thursday night...south winds 20 to 25 knots becoming southwest
to 30 knots after midnight. gusts to 35 knot gales. rain in the
evening...then a chance of snow after midnight. waves 10 to
14 feet. waves occasionally around 18 feet. 
.friday...west winds to 30 knots increasing to 35 knot gales in
the late morning and early afternoon...then decreasing to
30 knots early in the afternoon. a chance of snow. freezing
spray. waves 12 to 16 feet. waves occasionally around 20 feet. a
gale warning may be needed. 
.friday night...northwest winds 15 to 20 knots with gusts to
around 30 knots becoming west 10 to 15 knots in the late evening
and early morning...then becoming southwest 15 to 20 knots after
midnight. waves 10 to 14 feet subsiding to 6 to 9 feet in the
late evening and overnight. waves occasionally around 18 feet. 
.saturday...south winds 20 to 25 knots becoming west to 30 knots
late in the evening. gusts to 35 knot gales. a chance of snow. a
chance of rain late in the morning. waves 8 to 12 feet building
to 12 to 16 feet late in the evening. waves occasionally around
20 feet. 
.sunday...west winds to 30 knots with gusts to 35 knot gales
decreasing to 15 to 20 knots. waves 10 to 14 feet subsiding to
8 to 12 feet in the late evening and early morning. waves
occasionally around 18 feet. 
.monday...west winds 15 to 20 knots backing to the southwest
early in the evening...then becoming south 20 to 25 knots in the
late evening and early morning. waves 5 to 7 feet building to
8 to 12 feet in the late evening and early morning. waves
occasionally around 15 feet. 


$$

fzus63 kdtx 180206
glflh 
expires:202512181015;;770938

open lake forecast for lake huron
national weather service detroit/pontiac mi
906 pm est wed dec 17 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...low pressure, 29.10 inches, tracks toward lake
superior thursday and draws a cold front across the southern 
great lakes thursday evening. southerly winds increase thursday 
ahead of the front before shifting to the northwest friday behind 
the front. gale force gusts are possible today and friday, with 
snow squalls possible on friday.


lhz463-464-181015-
lake huron from harbor beach to port sanilac beyond 5nm off shore-
lake huron from port sanilac to port huron beyond 5nm off shore-
906 pm est wed dec 17 2025

...gale warning in effect from 7 am est thursday through friday
evening...

.rest of tonight...south winds 15 to 20 knots increasing to 20 to
25 knots with gusts to 35 knot gales after midnight. waves 2 to
4 feet building to 5 to 7 feet after midnight. waves occasionally
around 10 feet. 
.thursday...south winds to 30 knots with gusts to 40 knot gales.
a chance of rain. waves 8 to 12 feet. waves occasionally around
15 feet. 
.thursday night...south winds 20 to 25 knots becoming southwest
to 30 knots after midnight. gusts to 35 knot gales. rain in the
evening...then rain and a chance of snow after midnight. waves
8 to 12 feet. waves occasionally around 15 feet. 
.friday...west winds to 30 knots with gusts to 35 knot gales. a
chance of snow. waves 8 to 12 feet. waves occasionally around
15 feet. 
.friday night...west winds 20 to 25 knots with gusts to around
30 knots decreasing to 15 to 20 knots in the late evening and
early morning...then backing to the southwest after midnight.
waves 8 to 12 feet subsiding to 4 to 6 feet after midnight. waves
occasionally around 15 feet. 
.saturday...south winds 20 to 25 knots becoming west to 30 knots
late in the evening. gusts to 35 knot gales. a chance of rain
late in the morning. a chance of snow late in the morning. waves
6 to 9 feet. waves occasionally around 12 feet. 
.sunday...west winds to 30 knots with gusts to 35 knot gales
decreasing to 15 to 20 knots. waves 6 to 9 feet. waves
occasionally around 12 feet. 
.monday...west winds 15 to 20 knots decreasing to 10 to 15 knots
in the late morning and early afternoon...then becoming south
15 to 20 knots early in the evening increasing to 20 to 25 knots
in the late evening and early morning. waves 3 to 5 feet building
to 5 to 7 feet until early morning. waves occasionally around
10 feet. 


$$

fzus63 kmkx 180249
glflm 
expires:202512181030;;772448

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
849 pm cst wed dec 17 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 29.0 inches over northeastern north dakota
will track into lake superior by thursday afternoon. expect
increasing southwesterly winds tonight, becoming gales late
tonight and continuing through at least thursday morning. a brief lull
in the gales is possible thursday afternoon as low pressure 
crosses the upper peninsula of michigan, but then winds become 
westerly and increase back to gale force behind a strong cold 
front thursday evening, then turn northwesterly thursday night and
remain gales through friday morning. a gale warning is in effect 
for all open waters for these time frames. moderate freezing 
spray is expected to accompany the gales late thursday night into 
friday morning as a bitterly cold airmass enters the region. 

winds diminish briefly friday as low pressure exits to the west,
but another low pressure system will swing through southern canada
friday night, bringing potential for south-southwest gales once
again. winds will shift to become northwesterly behind the
trailing cold front of this low saturday afternoon, increasing to
near gales once again saturday night before diminishing again into
sunday. winds remain light through sunday night.


lmz261-362-364-366-563-565-567-868-181030-
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-
849 pm cst wed dec 17 2025

sheboygan wi to pentwater mi north...

...gale warning in effect through friday morning...

.rest of tonight...south winds 15 to 25 kt increasing to gales to
40 kt. chance of rain overnight. waves 3 to 5 ft building to 8 to
12 ft occasionally to 16 ft. 
.thursday...south gales to 40 kt diminishing to gales to 35 kt
late in the morning, then becoming southwest early in the
afternoon diminishing to 30 kt late. rain in the morning, then
chance of rain in the afternoon. waves 10 to 14 ft occasionally
to 18 ft subsiding to 8 to 12 ft occasionally to 16 ft. 
.thursday night...west gales to 35 kt becoming northwest gales to
40 kt. chance of snow in the evening, then snow likely overnight.
freezing spray overnight. waves 12 to 16 ft occasionally to
21 ft. 
.friday...northwest gales to 40 kt diminishing to 30 kt in the
afternoon. freezing spray in the morning. waves 12 to 16 ft
occasionally to 21 ft subsiding to 7 to 10 ft occasionally to
13 ft. 
.friday night...southwest winds to 30 kt becoming south. chance
of snow. waves 5 to 8 ft occasionally to 10 ft building to 10 to
14 ft occasionally to 18 ft. 
.saturday...south winds to 30 kt becoming west. chance of snow.
waves 12 to 16 ft occasionally to 21 ft subsiding to 8 to 12 ft
occasionally to 16 ft. 
.saturday night...west gales to 35 kt. waves 8 to 12 ft
occasionally to 16 ft. 
.sunday...northwest winds to 30 kt diminishing to 15 to 25 kt.
waves 8 to 11 ft occasionally to 14 ft subsiding to 5 to 8 ft
occasionally to 10 ft. 
.monday...southwest winds 15 to 25 kt becoming south. waves 5 to
8 ft occasionally to 10 ft building to 7 to 10 ft occasionally to
13 ft.  

$$

fzus63 kmkx 180249
glflm 
expires:202512181030;;772449

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
849 pm cst wed dec 17 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 29.0 inches over northeastern north dakota
will track into lake superior by thursday afternoon. expect
increasing southwesterly winds tonight, becoming gales late
tonight and continuing through at least thursday morning. a brief lull
in the gales is possible thursday afternoon as low pressure 
crosses the upper peninsula of michigan, but then winds become 
westerly and increase back to gale force behind a strong cold 
front thursday evening, then turn northwesterly thursday night and
remain gales through friday morning. a gale warning is in effect 
for all open waters for these time frames. moderate freezing 
spray is expected to accompany the gales late thursday night into 
friday morning as a bitterly cold airmass enters the region. 

winds diminish briefly friday as low pressure exits to the west,
but another low pressure system will swing through southern canada
friday night, bringing potential for south-southwest gales once
again. winds will shift to become northwesterly behind the
trailing cold front of this low saturday afternoon, increasing to
near gales once again saturday night before diminishing again into
sunday. winds remain light through sunday night.


lmz080-669-671-673-675-777-779-870-872-874-876-878-181030-
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-
849 pm cst wed dec 17 2025

sheboygan wi to pentwater mi south...

...gale warning in effect through friday morning...

.rest of tonight...south winds 15 to 25 kt increasing to gales to
40 kt. chance of rain overnight. waves 3 to 5 ft building to 8 to
11 ft occasionally to 14 ft. 
.thursday...south gales to 35 kt becoming west to 30 kt. rain.
waves 10 to 14 ft occasionally to 18 ft. 
.thursday night...west gales to 40 kt. freezing spray. chance of
snow. waves 14 to 18 ft occasionally to 23 ft. 
.friday...northwest gales to 40 kt becoming west to 30 kt in the
afternoon. freezing spray. waves 14 to 18 ft occasionally to
23 ft subsiding to 10 to 14 ft occasionally to 18 ft. 
.friday night...southwest winds to 30 kt becoming south. waves
5 to 8 ft occasionally to 10 ft building to 10 to 14 ft
occasionally to 18 ft. 
.saturday...south winds to 30 kt becoming west. chance of snow.
waves 12 to 16 ft occasionally to 21 ft. 
.saturday night...northwest gales to 35 kt. waves 10 to 14 ft
occasionally to 18 ft. 
.sunday...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. 
.monday...south winds to 30 kt. waves 7 to 10 ft occasionally to
13 ft.  

$$

fzus63 kmqt 180301
glfls 
expires:202512180900;;772962

open lake forecast for lake superior
national weather service marquette mi
1000 pm est wed dec 17 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 28.9 inch alberta clipper tracks from the canadian prairies to 
lake superior tonight, weakening to 29.1 inches as it does so. 
tomorrow, the low tracks east over the lake before reaching quebec 
by friday. a 30.0 inch ridge then returns to the lake on friday via 
a 30.2 inch high over the lower mississippi valley and a weakening 
30.0 inch high over northern ontario. another low pressure of around 
29.5 inches tracks north of lake superior on saturday. this is then 
followed by a 30.3 inch high over the canadian prairies sliding 
southeast into the great lakes late this weekend, building to 30.6 
inches by monday morning.



lsz265-180900-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
1000 pm est wed dec 17 2025

...gale warning in effect through friday morning...
...heavy freezing spray warning in effect from thursday evening
through friday morning...

.rest of tonight...south winds 20 to 30 knots increasing to gales
to 40 knots by midnight. a chance of drizzle, freezing drizzle
and snow showers. waves 4 to 7 feet occasionally to 9 feet
building to 7 to 10 feet occasionally to 13 feet, then subsiding
to 4 to 7 feet occasionally to 9 feet. 
.thursday...south winds 20 to 30 knots veering west by mid
afternoon. a chance of rain showers in the morning, then rain
showers likely with pockets of snow showers in the afternoon.
waves subsiding to 1 to 3 feet, then building to 4 to 7 feet
occasionally to 9 feet. 
.thursday night...north gales to 35 knots increasing to gales to
45 knots with a few storm force gusts to 50 knots possible by
midnight, then diminishing to gales to 45 knots late. freezing
spray. snow showers. waves building to 15 to 20 feet occasionally
to 25 feet. 
.friday...north gales to 40 knots becoming northwest 15 to
25 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. 
.friday night...south winds 20 to 30 knots increasing to gales to
35 knots after midnight. a chance of snow showers. freezing spray
after midnight. waves subsiding to 2 to 4 feet, then building to
5 to 8 feet occasionally to 10 feet. 
.saturday...southwest gales to 35 knots becoming west gales to
40 knots in the afternoon. snow showers likely in the morning,
then a chance of snow showers in the afternoon. freezing spray in
the afternoon. waves subsiding to 3 to 6 feet occasionally to
8 feet, then building to 8 to 11 feet occasionally to 14 feet. 
.saturday night...west gales to 45 knots becoming northwest gales
to 40 knots after midnight. freezing spray. a chance of snow
showers. waves building to 9 to 12 feet occasionally to 15 feet,
then subsiding to 7 to 10 feet occasionally to 13 feet. 
.sunday...northwest winds 20 to 30 knots becoming west 15 to
25 knots. waves subsiding to calm to 2 feet. 
.monday...south 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 180301
glfls 
expires:202512180900;;772963

open lake forecast for lake superior
national weather service marquette mi
1000 pm est wed dec 17 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 28.9 inch alberta clipper tracks from the canadian prairies to 
lake superior tonight, weakening to 29.1 inches as it does so. 
tomorrow, the low tracks east over the lake before reaching quebec 
by friday. a 30.0 inch ridge then returns to the lake on friday via 
a 30.2 inch high over the lower mississippi valley and a weakening 
30.0 inch high over northern ontario. another low pressure of around 
29.5 inches tracks north of lake superior on saturday. this is then 
followed by a 30.3 inch high over the canadian prairies sliding 
southeast into the great lakes late this weekend, building to 30.6 
inches by monday morning.



lsz266-180900-
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 pm est wed dec 17 2025

...gale warning in effect through friday morning...
...heavy freezing spray warning in effect from thursday evening
through friday morning...

.rest of tonight...south gales to 40 knots. a chance of freezing
drizzle late in the evening. a chance of drizzle and snow
showers. a chance of rain showers after midnight. waves 5 to
8 feet occasionally to 10 feet building to 10 to 14 feet
occasionally to 18 feet, then subsiding to 9 to 12 feet
occasionally to 15 feet. 
.thursday...south gales to 35 knots diminishing to 20 to 30 knots
by late morning, then becoming southwest gales to 35 knots by mid
afternoon. drizzle likely in the morning. rain showers. snow
showers in the afternoon. waves subsiding to 3 to 6 feet
occasionally to 8 feet, then building to 7 to 10 feet
occasionally to 13 feet. 
.thursday night...north gales to 45 knots. heavy freezing spray.
rain showers in the evening. snow showers. waves building to
15 to 20 feet occasionally to 25 feet. 
.friday...north gales to 40 knots diminishing to 15 to 25 knots
in the afternoon. freezing spray. a chance of snow showers. waves
subsiding to 3 to 6 feet occasionally to 8 feet. 
.friday night...south gales to 35 knots. a chance of snow showers
in the evening, then snow showers likely after midnight. freezing
spray after midnight. waves subsiding to 2 to 4 feet, then
building to 8 to 11 feet occasionally to 14 feet. 
.saturday...south winds 20 to 30 knots becoming west gales to
40 knots in the afternoon. snow showers likely in the morning,
then a chance of snow showers in the afternoon. waves subsiding
to 7 to 10 feet occasionally to 13 feet, then building to 10 to
14 feet occasionally to 18 feet. 
.saturday night...west gales to 45 knots becoming northwest gales
to 40 knots after midnight. freezing spray. snow showers likely
in the evening. a chance of snow showers after midnight. waves
building to 12 to 17 feet occasionally to 21 feet, then subsiding
to 10 to 14 feet occasionally to 18 feet. 
.sunday...northwest winds 20 to 30 knots becoming west 15 to
25 knots. freezing spray. a chance of snow showers. waves
subsiding to 3 to 5 feet occasionally to 7 feet. 
.monday...south winds 15 to 25 knots increasing to 20 to
30 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.

$$

fzus63 kmqt 180301
glfls 
expires:202512180900;;772964

open lake forecast for lake superior
national weather service marquette mi
1000 pm est wed dec 17 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 28.9 inch alberta clipper tracks from the canadian prairies to 
lake superior tonight, weakening to 29.1 inches as it does so. 
tomorrow, the low tracks east over the lake before reaching quebec 
by friday. a 30.0 inch ridge then returns to the lake on friday via 
a 30.2 inch high over the lower mississippi valley and a weakening 
30.0 inch high over northern ontario. another low pressure of around 
29.5 inches tracks north of lake superior on saturday. this is then 
followed by a 30.3 inch high over the canadian prairies sliding 
southeast into the great lakes late this weekend, building to 30.6 
inches by monday morning.



lsz267-180900-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
1000 pm est wed dec 17 2025

...gale warning in effect through friday morning...
...heavy freezing spray warning in effect from thursday evening
through friday morning...

.rest of tonight...south winds 20 to 30 knots increasing to gales
to 40 knots by midnight. a chance of snow showers. a chance of
drizzle after midnight. waves 3 to 6 feet occasionally to 8 feet
building to 7 to 10 feet occasionally to 13 feet. 
.thursday...south gales to 35 knots diminishing to 15 to
25 knots. drizzle likely in the morning. rain showers. waves
subsiding to 2 to 4 feet. 
.thursday night...west winds 20 to 30 knots becoming northwest
gales to 35 knots by midnight, then becoming north gales to
40 knots late. rain showers in the evening. snow showers.
freezing spray after midnight. waves building to 10 to 14 feet
occasionally to 18 feet. 
.friday...north gales to 35 knots diminishing to 15 to 25 knots
in the afternoon. freezing spray. snow showers likely in the
morning. a slight chance of snow showers in the afternoon. waves
subsiding to 3 to 5 feet occasionally to 7 feet. 
.friday night...southeast winds 15 to 25 knots becoming south
gales to 35 knots after midnight. a chance of snow showers in the
evening, then snow showers likely after midnight. freezing spray
after midnight. waves subsiding to 1 to 3 feet, then building to
5 to 8 feet occasionally to 10 feet. 
.saturday...south gales to 35 knots veering west in the
afternoon. snow showers. waves building to 5 to 9 feet
occasionally to 11 feet. 
.saturday night...west gales to 40 knots becoming northwest gales
to 35 knots after midnight. freezing spray. snow showers. waves
building to 12 to 17 feet occasionally to 21 feet, then subsiding
to 10 to 14 feet occasionally to 18 feet. 
.sunday...northwest winds 20 to 30 knots becoming west 15 to
25 knots. freezing spray. a chance of snow showers. waves
subsiding to 3 to 5 feet occasionally to 7 feet. 
.monday...south winds 15 to 25 knots increasing to 20 to
30 knots. a chance of snow showers, then snow showers likely.
waves building to 3 to 6 feet occasionally to 8 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 180301
glfls 
expires:202512180900;;772959

open lake forecast for lake superior
national weather service marquette mi
1000 pm est wed dec 17 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 28.9 inch alberta clipper tracks from the canadian prairies to 
lake superior tonight, weakening to 29.1 inches as it does so. 
tomorrow, the low tracks east over the lake before reaching quebec 
by friday. a 30.0 inch ridge then returns to the lake on friday via 
a 30.2 inch high over the lower mississippi valley and a weakening 
30.0 inch high over northern ontario. another low pressure of around 
29.5 inches tracks north of lake superior on saturday. this is then 
followed by a 30.3 inch high over the canadian prairies sliding 
southeast into the great lakes late this weekend, building to 30.6 
inches by monday morning.



lsz162-180900-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 pm est wed dec 17 2025 /900 pm cst wed dec 17 2025/

...gale warning in effect from thursday afternoon through late
thursday night...
...heavy freezing spray warning in effect from thursday evening
through friday morning...

.rest of tonight...south winds 15 to 25 knots increasing to 20 to
30 knots by midnight, then veering southwest late. a chance of
freezing drizzle late in the evening. a chance of rain showers
and drizzle, possibly mixed with snow showers. waves 3 to 5 feet
occasionally to 7 feet building to 4 to 7 feet occasionally to
9 feet, then subsiding to 3 to 6 feet occasionally to 8 feet. 
.thursday...southwest winds 15 to 25 knots veering west by late
morning, then becoming north gales to 35 knots by mid afternoon.
a chance of drizzle in the morning. a chance of rain showers.
snow showers likely in the afternoon. waves subsiding to 3 to
5 feet occasionally to 7 feet, then building to 5 to 8 feet
occasionally to 10 feet. 
.thursday night...north gales to 40 knots. heavy freezing spray.
snow showers likely in the evening. a slight chance of snow
showers after midnight. waves building to 7 to 10 feet
occasionally to 13 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet. 
.friday...north winds 15 to 25 knots becoming southeast 5 to
15 knots in the afternoon. a chance of snow showers in the
afternoon. waves subsiding to calm to 2 feet. 
.friday night...south winds 20 to 30 knots veering southwest
after midnight. a chance of snow showers. waves building to 4 to
7 feet occasionally to 9 feet. 
.saturday...west winds 20 to 30 knots increasing to gales to
35 knots in the afternoon. freezing spray in the afternoon. waves
building to 4 to 8 feet occasionally to 10 feet. 
.saturday night...west winds 20 to 30 knots becoming northwest
15 to 25 knots after midnight. freezing spray in the evening.
waves subsiding to 2 to 4 feet. 
.sunday...west winds 10 to 20 knots. waves subsiding to calm to
2 feet. 
.monday...south winds 10 to 20 knots veering southwest. waves
building to 1 to 3 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 180301
glfls 
expires:202512180900;;772960

open lake forecast for lake superior
national weather service marquette mi
1000 pm est wed dec 17 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 28.9 inch alberta clipper tracks from the canadian prairies to 
lake superior tonight, weakening to 29.1 inches as it does so. 
tomorrow, the low tracks east over the lake before reaching quebec 
by friday. a 30.0 inch ridge then returns to the lake on friday via 
a 30.2 inch high over the lower mississippi valley and a weakening 
30.0 inch high over northern ontario. another low pressure of around 
29.5 inches tracks north of lake superior on saturday. this is then 
followed by a 30.3 inch high over the canadian prairies sliding 
southeast into the great lakes late this weekend, building to 30.6 
inches by monday morning.



lsz263-180900-
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 pm est wed dec 17 2025

...gale warning in effect from thursday afternoon through friday
morning...
...heavy freezing spray warning in effect from thursday evening
through friday morning...

.rest of tonight...south winds 15 to 25 knots increasing to gales
to 35 knots by midnight, then becoming southwest 20 to 30 knots
late. a chance of freezing drizzle and snow showers late in the
evening. a chance of drizzle. a chance of rain showers after
midnight. waves 3 to 5 feet occasionally to 7 feet building to
4 to 7 feet occasionally to 9 feet. 
.thursday...southwest winds 15 to 25 knots becoming north gales
to 40 knots. a chance of rain showers in the morning, then snow
showers, possibly mixed with rain in the afternoon. waves
subsiding to 3 to 5 feet occasionally to 7 feet, then building to
7 to 10 feet occasionally to 13 feet. 
.thursday night...north gales to 45 knots. heavy 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...north gales to 35 knots becoming southeast 10 to
20 knots in the afternoon. freezing spray in the morning. a
slight chance of snow showers. waves subsiding to 1 to 3 feet. 
.friday night...south winds 20 to 30 knots. a chance of snow
showers. freezing spray after midnight. waves building to 4 to
8 feet occasionally to 10 feet. 
.saturday...southwest gales to 35 knots becoming west gales to
40 knots in the afternoon. a chance of snow showers. freezing
spray in the afternoon. waves building to 9 to 12 feet
occasionally to 15 feet. 
.saturday night...west gales to 35 knots becoming northwest 20 to
30 knots after midnight. freezing spray. waves subsiding to 4 to
7 feet occasionally to 9 feet. 
.sunday...northwest winds 10 to 20 knots backing west. waves
subsiding to 1 to 3 feet. 
.monday...south winds 10 to 20 knots becoming southwest 15 to
25 knots. waves building to 3 to 5 feet occasionally to 7 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 180301
glfls 
expires:202512180900;;772961

open lake forecast for lake superior
national weather service marquette mi
1000 pm est wed dec 17 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 28.9 inch alberta clipper tracks from the canadian prairies to 
lake superior tonight, weakening to 29.1 inches as it does so. 
tomorrow, the low tracks east over the lake before reaching quebec 
by friday. a 30.0 inch ridge then returns to the lake on friday via 
a 30.2 inch high over the lower mississippi valley and a weakening 
30.0 inch high over northern ontario. another low pressure of around 
29.5 inches tracks north of lake superior on saturday. this is then 
followed by a 30.3 inch high over the canadian prairies sliding 
southeast into the great lakes late this weekend, building to 30.6 
inches by monday morning.



lsz264-180900-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
1000 pm est wed dec 17 2025

...gale warning in effect from thursday afternoon through friday
morning...
...heavy freezing spray warning in effect from thursday evening
through friday morning...

.rest of tonight...south winds 15 to 25 knots increasing to gales
to 35 knots by midnight. a chance of drizzle and freezing drizzle
late in the evening. a chance of snow showers. a chance of rain
showers after midnight. waves 4 to 7 feet occasionally to 9 feet
building to 8 to 11 feet occasionally to 14 feet, then subsiding
to 6 to 9 feet occasionally to 11 feet. 
.thursday...south winds 15 to 25 knots increasing to gales to
35 knots by late morning, then becoming north gales to 40 knots
by mid afternoon. a slight chance of snow showers in the morning.
rain showers likely. snow showers in the afternoon. waves
subsiding to 3 to 6 feet occasionally to 8 feet, then building to
8 to 11 feet occasionally to 14 feet. 
.thursday night...north gales to 45 knots. heavy freezing spray.
snow showers. waves building to 12 to 17 feet occasionally to
21 feet, then subsiding to 11 to 15 feet occasionally to 19 feet.
.friday...north gales to 40 knots diminishing to 10 to 20 knots
in the afternoon. heavy freezing spray in the morning. a slight
chance of snow showers. waves subsiding to 1 to 3 feet. 
.friday night...south winds 20 to 30 knots increasing to gales to
35 knots after midnight. a chance of snow showers. freezing spray
after midnight. waves building to 7 to 10 feet occasionally to
13 feet. 
.saturday...southwest gales to 35 knots becoming west gales to
40 knots in the afternoon. a chance of snow showers. freezing
spray in the afternoon. waves subsiding to 6 to 9 feet
occasionally to 11 feet, then building to 10 to 14 feet
occasionally to 18 feet. 
.saturday night...northwest gales to 40 knots. freezing spray.
waves subsiding to 6 to 9 feet occasionally to 11 feet. 
.sunday...northwest winds 15 to 25 knots becoming west 10 to
20 knots. waves subsiding to 1 to 3 feet. 
.monday...south winds 10 to 20 knots becoming southwest 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.

$$