fzus61 kbuf 152003
glflo 
expires:202610160300;;156364

open lake forecast for lake ontario
national weather service buffalo ny
403 pm edt thu oct 15 2026

for waters beyond five nautical miles of shore on lake ontario

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...a 30.4 inch high will drift east across quebec and new 
england through tonight. meanwhile, a 29.5 inch low will move from 
southern lower michigan tonight to just north of the lake friday 
morning, while pushing an attendant warm front across the lake. the 
low will then reach the saint lawrence valley by late friday 
afternoon, while dragging an attendant cold front across the lake. 
this low will deepen to 29.1 inches as it moves from the saint 
lawrence valley friday night to the canadian maritimes saturday. a 
strong and broad 30.6 inch high is then forecast to build from the 
ohio valley saturday night to the mid atlantic and southern new 
england by sunday night, before drifting south of the canadian 
maritimes monday. another 30.4 inch high over northwestern ontario 
province will then build southeast across the lower great lakes 
monday night into tuesday.


loz062-160300-
lake ontario open waters from the niagara river to hamlin beach-
403 pm edt thu oct 15 2026

.tonight...east winds 15 to 20 knots becoming southeast 10 to
15 knots. rain likely late this evening. rain after midnight.
waves 3 to 5 feet subsiding to 2 to 4 feet. 
.friday...southwest winds 15 to 20 knots becoming northwest and
increasing to 30 knots. rain in the morning, then a chance of
rain in the afternoon. waves 2 to 4 feet building to 5 to 9 feet.
waves occasionally around 11 feet. 
.friday night...northwest winds to 30 knots becoming north. waves
5 to 8 feet. waves occasionally around 10 feet. 
.saturday...north winds 15 to 25 knots becoming west and
diminishing to 10 to 15 knots. waves 4 to 7 feet subsiding to
1 to 3 feet. waves occasionally around 9 feet. 
.saturday night...west winds 10 to 15 knots increasing to 15 to
20 knots. waves 2 to 4 feet building to 3 to 5 feet. 
.sunday...southwest winds 15 to 20 knots. waves 3 to 5 feet. 
.monday...southwest winds 5 to 15 knots becoming west. waves 2 to
4 feet subsiding to 2 feet or less. 
.tuesday...northwest winds less than 10 knots becoming northeast.
waves 1 foot or less. 

$$

fzus61 kbuf 152003
glflo 
expires:202610160300;;156365

open lake forecast for lake ontario
national weather service buffalo ny
403 pm edt thu oct 15 2026

for waters beyond five nautical miles of shore on lake ontario

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...a 30.4 inch high will drift east across quebec and new 
england through tonight. meanwhile, a 29.5 inch low will move from 
southern lower michigan tonight to just north of the lake friday 
morning, while pushing an attendant warm front across the lake. the 
low will then reach the saint lawrence valley by late friday 
afternoon, while dragging an attendant cold front across the lake. 
this low will deepen to 29.1 inches as it moves from the saint 
lawrence valley friday night to the canadian maritimes saturday. a 
strong and broad 30.6 inch high is then forecast to build from the 
ohio valley saturday night to the mid atlantic and southern new 
england by sunday night, before drifting south of the canadian 
maritimes monday. another 30.4 inch high over northwestern ontario 
province will then build southeast across the lower great lakes 
monday night into tuesday.


loz063>065-160300-
lake ontario open waters from hamlin beach to the saint lawrence
river-
403 pm edt thu oct 15 2026

.tonight...east winds 10 to 15 knots becoming southeast and
increasing to 30 knots after midnight. a chance of rain late this
evening. rain after midnight. waves 1 to 3 feet building to 4 to
7 feet. waves occasionally around 9 feet. 
.friday...south winds to 30 knots becoming west. rain through
early afternoon, then a chance of rain late. waves 4 to 7 feet
building to 6 to 9 feet. waves occasionally around 11 feet. 
.friday night...northwest winds to 30 knots becoming north. a
chance of rain in the evening. waves 5 to 9 feet. waves
occasionally around 11 feet. 
.saturday...north winds to 30 knots becoming northwest and
diminishing to 10 to 15 knots in the afternoon. waves 5 to 8 feet
subsiding to 2 to 4 feet. waves occasionally around 10 feet. 
.saturday night...west winds 15 to 20 knots. waves 2 to 4 feet
building to 3 to 5 feet. 
.sunday...southwest winds 15 to 20 knots. waves 3 to 5 feet
subsiding to 2 to 4 feet. 
.monday...southwest winds 15 to 20 knots diminishing to 5 to
15 knots. waves 2 to 4 feet subsiding to 1 foot or less. 
.tuesday...west winds 10 knots or less becoming northeast. waves
1 foot or less. 

$$

fzus61 kcle 151941
glfle 
expires:202610160215;;155713

open lake forecast for lake erie
national weather service cleveland oh
341 pm edt thu oct 15 2026

for waters beyond five nautical miles of shore on lake erie

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis... 
a warm front will lift north across the lake late this evening as
low pressure 29.60 inches moves into the great lakes. a cold 
front will sweep across the lake early friday with high pressure 
30.50 inches building into the ohio valley this weekend.


lez164>168-160215-
the islands to vermilion oh beyond 5 nm off shoreline to us-
canadian border-
vermilion to avon point oh beyond 5 nm off shoreline to us-
canadian border-
avon point to willowick oh beyond 5 nm off shoreline to us-
canadian border-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-
341 pm edt thu oct 15 2026

.tonight...east winds 10 to 15 knots becoming southwest and
increasing to 30 knots after midnight. a chance of showers early,
then a chance of showers and thunderstorms late this evening.
showers likely with a slight chance of thunderstorms after
midnight. waves 1 to 3 feet building to 4 to 7 feet. waves
occasionally around 9 feet. 
.friday...southwest winds to 30 knots becoming northwest. a
chance of showers with a slight chance of thunderstorms in the
morning, then a slight chance of showers early in the afternoon.
showers likely late. waves 5 to 9 feet. waves occasionally around
11 feet. 
.friday night...north winds to 30 knots. a chance of showers.
waves 6 to 10 feet building to 7 to 11 feet. waves occasionally
around 14 feet. 
.saturday...north winds to 30 knots becoming northwest and
diminishing to 5 to 10 knots in the afternoon. waves 5 to 9 feet
subsiding to 2 to 4 feet. waves occasionally around 11 feet. 
.saturday night...northwest winds 5 to 15 knots becoming
southwest 15 to 20 knots. waves 1 to 3 feet building to 2 to
4 feet. 
.sunday...southwest winds 15 to 20 knots. waves 2 to 4 feet. 
.monday...southwest winds 5 to 15 knots. waves 2 to 4 feet
subsiding to 1 foot or less. 
.tuesday...west winds 10 knots or less becoming northeast. waves
1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 151941
glfle 
expires:202610160215;;155714

open lake forecast for lake erie
national weather service cleveland oh
341 pm edt thu oct 15 2026

for waters beyond five nautical miles of shore on lake erie

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis... 
a warm front will lift north across the lake late this evening as
low pressure 29.60 inches moves into the great lakes. a cold 
front will sweep across the lake early friday with high pressure 
30.50 inches building into the ohio valley this weekend.


lez061-169-160215-
ripley to buffalo ny extending from 5nm off shoreline to us-
canadian border-
conneaut oh to ripley ny beyond 5 nm off shoreline to us-
canadian border-
341 pm edt thu oct 15 2026

.tonight...east winds 10 to 15 knots becoming southwest and
increasing to 15 to 25 knots. a chance of showers with a slight
chance of thunderstorms late this evening. showers with a chance
of thunderstorms after midnight. waves 1 to 3 feet building to
3 to 6 feet. 
.friday...southwest winds to 30 knots becoming northwest. showers
likely with a chance of thunderstorms early, then showers likely
with a slight chance of thunderstorms late in the morning. a
chance of showers in the afternoon. waves 5 to 8 feet building to
6 to 9 feet. waves occasionally around 11 feet. 
.friday night...northwest winds 20 to 25 knots becoming north. a
chance of showers in the evening. waves 5 to 8 feet. waves
occasionally around 10 feet. 
.saturday...north winds 15 to 25 knots becoming northwest and
diminishing to 10 to 15 knots. waves 3 to 6 feet subsiding to
1 to 3 feet. 
.saturday night...northwest winds 10 to 15 knots becoming
southwest 15 to 20 knots. waves 1 to 3 feet. 
.sunday...southwest winds 15 to 20 knots. waves 2 to 4 feet
subsiding to 1 to 3 feet. 
.monday...southwest winds 5 to 15 knots. waves 1 to 3 feet. 
.tuesday...west winds less than 10 knots becoming northeast.
waves 1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 151941
glfle 
expires:202610160215;;155712

open lake forecast for lake erie
national weather service cleveland oh
341 pm edt thu oct 15 2026

for waters beyond five nautical miles of shore on lake erie

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis... 
a warm front will lift north across the lake late this evening as
low pressure 29.60 inches moves into the great lakes. a cold 
front will sweep across the lake early friday with high pressure 
30.50 inches building into the ohio valley this weekend.


lez162-163-160215-
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-
341 pm edt thu oct 15 2026

.tonight...east winds 10 to 15 knots becoming southwest and
increasing to 15 to 25 knots. a chance of showers with a slight
chance of thunderstorms early, then showers likely with a slight
chance of thunderstorms. a chance of showers with a slight chance
of thunderstorms late. waves 1 to 2 feet building to 2 to 4 feet.
.friday...west winds 20 to 25 knots becoming northwest. a slight
chance of showers and thunderstorms early, then a slight chance
of showers. a chance of showers late. waves 3 to 6 feet. 
.friday night...north winds to 30 knots. a chance of showers in
the evening. waves 3 to 6 feet building to 4 to 7 feet. waves
occasionally around 9 feet. 
.saturday...north winds to 30 knots becoming northwest and
diminishing to 5 to 15 knots in the afternoon. waves 3 to 6 feet
subsiding to 1 to 3 feet. 
.saturday night...west winds 5 to 15 knots becoming southwest.
waves 2 feet or less. 
.sunday...southwest winds 10 to 15 knots. waves 1 to 2 feet. 
.monday...southwest winds 10 knots or less becoming west. waves
2 feet or less. 
.tuesday...northwest winds less than 10 knots. waves 1 foot or
less. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 151944
glfsc 
expires:202610160400;;155820

lake st clair forecast
national weather service detroit/pontiac mi
344 pm edt thu oct 15 2026

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...low pressure is forecast to strengthen to 29.50 
inches as it tracks across the central great lakes tonight and 
early friday. a strong cold front in its wake brings northerly 
gales friday afternoon and evening. a ridge of high pressure then 
builds across the ohio valley on saturday and sunday.


lcz460-160400-
lake st clair-
344 pm edt thu oct 15 2026

...small craft advisory in effect from 10 pm edt this evening
through saturday morning...

.tonight...southeast winds 10 to 15 knots becoming south 15 to 20
knots after midnight...then becoming southwest 20 to 25 knots early
in the morning. a chance of light rain early in the evening...then
rain by midnight. a chance of light rain early in the morning. waves
1 to 3 feet building to 2 to 4 feet after midnight.
.friday...west winds 20 to 25 knots with gusts to 30 knots becoming
northwest 15 to 20 knots early in the afternoon...then increasing to
20 to 25 knots with gusts to 30 knots late in the afternoon. mostly
cloudy. a chance of light rain early in the morning. a chance of
light rain early in the afternoon...then light rain likely late in
the afternoon. waves 2 to 4 feet subsiding to 1 to 3 feet in the
late morning and afternoon.
.friday night...north winds to 30 knots with gusts to 35 knot gales.
mostly cloudy early in the evening becoming mostly clear. waves 3 to
5 feet. waves occasionally around 7 feet. a gale warning may be 
needed.
.saturday...north winds 20 to 25 knots with gusts to 30 knots
becoming northwest 5 to 10 knots. sunny. waves 2 to 4 feet subsiding
to 2 feet or less in the late morning and afternoon.
.saturday night...southwest winds 10 to 15 knots. clear. waves 2
feet or less.
.sunday...southwest winds 10 to 15 knots. clear. waves 1 to 3 feet.
.monday...southwest winds 10 to 15 knots. mostly clear. waves 2 feet
or less.
.tuesday...light and variable winds. mostly clear. waves 2 feet or
less.

$$

fzus63 kdtx 151944
glflh 
expires:202610160400;;155769

open lake forecast for lake huron
national weather service detroit/pontiac mi
344 pm edt thu oct 15 2026

for waters beyond five nautical miles off shore on lake huron

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...low pressure is forecast to strengthen to 29.50 inches
as it tracks across the central great lakes tonight and early
friday. a strong cold front in its wake brings northerly gales
friday afternoon and evening. a ridge of high pressure then
builds across the ohio valley on saturday and sunday.


lhz361-160400-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
344 pm edt thu oct 15 2026

...gale warning in effect from friday afternoon through late
friday night...

.tonight...southeast winds 10 to 15 knots backing to the
northeast early in the morning. rain. waves 3 to 5 feet subsiding
to 2 to 4 feet after midnight. 
.friday...north winds 15 to 20 knots increasing to 30 knots with
gusts to 35 knot gales. a chance of rain in the morning. waves
2 to 4 feet building to 5 to 7 feet in the afternoon. waves
occasionally around 10 feet. 
.friday night...north winds to 30 knots with gusts to 35 knot
gales decreasing to 15 to 20 knots. waves 4 to 6 feet. 
.saturday...north winds 5 to 10 knots becoming west 10 to
15 knots in the late morning and early afternoon...then
increasing to 20 to 25 knots with gusts to around 30 knots early
in the afternoon. waves 1 to 3 feet building to 4 to 6 feet early
in the afternoon. waves occasionally around 8 feet. 
.saturday night...southwest winds 15 to 20 knots with gusts to
around 30 knots. waves 4 to 6 feet. waves occasionally around
8 feet. 
.sunday...southwest winds 15 to 20 knots with gusts to around
30 knots. waves 3 to 5 feet. 
.monday...southwest winds 10 to 15 knots becoming light and
variable. waves 1 to 3 feet. 
.tuesday...light and variable winds. waves 2 feet or less. 


$$

fzus63 kdtx 151944
glflh 
expires:202610160400;;155770

open lake forecast for lake huron
national weather service detroit/pontiac mi
344 pm edt thu oct 15 2026

for waters beyond five nautical miles off shore on lake huron

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...low pressure is forecast to strengthen to 29.50 inches
as it tracks across the central great lakes tonight and early
friday. a strong cold front in its wake brings northerly gales
friday afternoon and evening. a ridge of high pressure then
builds across the ohio valley on saturday and sunday.


lhz362-363-160400-
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-
344 pm edt thu oct 15 2026

...gale warning in effect from friday afternoon through late
friday night...

.tonight...southeast winds 10 to 15 knots increasing to 15 to
20 knots late in the evening...then becoming east 10 to 15 knots
after midnight. rain. waves 1 to 3 feet building to 2 to 4 feet
in the late evening and overnight. 
.friday...west winds 15 to 20 knots becoming north 20 to 25 knots
late in the morning...then increasing to 30 knots with gusts to
35 knot gales in the afternoon. a chance of rain. waves 3 to
5 feet building to 8 to 12 feet in the afternoon. waves
occasionally around 15 feet. 
.friday night...north winds to 30 knots decreasing to 20 to
25 knots after midnight. gusts to 35 knot gales. a chance of rain
in the evening. waves 10 to 14 feet. waves occasionally around
18 feet. 
.saturday...north winds 15 to 20 knots becoming west 10 to
15 knots in the late morning and afternoon. waves 6 to 9 feet
subsiding to 3 to 5 feet in the late morning and afternoon. waves
occasionally around 12 feet. 
.saturday night...southwest winds 15 to 20 knots. waves 4 to
6 feet. 
.sunday...southwest winds 20 to 25 knots decreasing to 15 to
20 knots late in the evening. gusts to 35 knot gales. waves 6 to
9 feet. waves occasionally around 12 feet. 
.monday...southwest winds 15 to 20 knots decreasing to 5 to
10 knots. waves 4 to 6 feet subsiding to 1 to 3 feet. waves 
occasionally around 8 feet. 
.tuesday...light and variable winds. waves 2 feet or less. 


$$

fzus63 kdtx 151944
glflh 
expires:202610160400;;155771

open lake forecast for lake huron
national weather service detroit/pontiac mi
344 pm edt thu oct 15 2026

for waters beyond five nautical miles off shore on lake huron

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...low pressure is forecast to strengthen to 29.50 inches
as it tracks across the central great lakes tonight and early
friday. a strong cold front in its wake brings northerly gales
friday afternoon and evening. a ridge of high pressure then
builds across the ohio valley on saturday and sunday.


lhz462>464-160400-
lake huron from port austin to harbor beach beyond 5nm off shore-
lake huron from harbor beach to port sanilac beyond 5nm off shore-
lake huron from port sanilac to port huron beyond 5nm off shore-
344 pm edt thu oct 15 2026

...gale warning in effect from friday afternoon through late
friday night...

.tonight...southeast winds 10 to 15 knots increasing to 15 to
20 knots in the late evening and overnight. rain. waves 2 to
4 feet building to 3 to 5 feet in the late evening and overnight.
.friday...southwest winds 15 to 20 knots becoming west 20 to
25 knots with gusts to around 30 knots late in the morning...then
veering to the northwest with gusts to around 30 knots early in
the afternoon becoming north to 30 knots with gusts to 35 knot
gales late in the afternoon. a chance of rain in the morning...
then rain in the afternoon. waves 3 to 5 feet building to 8 to
12 feet in the afternoon. waves occasionally around 15 feet. 
.friday night...north at 35 knot gales with gusts to 40 knot
gales decreasing to 30 knots after midnight. a chance of rain.
waves 12 to 16 feet. waves occasionally around 20 feet.
.saturday...north winds 20 to 25 knots becoming northwest 10 to
15 knots in the late morning and early afternoon...then backing
to the west early in the afternoon. waves 8 to 12 feet subsiding
to 3 to 5 feet early in the afternoon. waves occasionally around
15 feet. 
.saturday night...southwest winds 15 to 20 knots. waves 3 to
5 feet. 
.sunday...southwest winds 15 to 20 knots. gusts to 30 knots late
in the morning. waves 4 to 6 feet. waves occasionally around
8 feet. 
.monday...southwest winds 10 to 15 knots decreasing to 5 to
10 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.tuesday...west winds 5 to 10 knots early in the morning becoming
light and variable...then becoming northeast 5 to 10 knots by
midnight. waves 2 feet or less. 


$$

fzus63 kmkx 151944
glflm 
expires:202610160315;;155815

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
244 pm cdt thu oct 15 2026

for waters beyond five nautical miles of shore on lake michigan.

waves are provided as a range of significant wave heights, which
is the average of the highest 1/3 of the wave, along with the
average height of the highest 10% of the waves which will
occasionally be encountered.

.synopsis...

two areas of low pressure are progged to merge over the great 
lakes region into a single low pressure later today into tonight
and deepen to around 29.4 inches as it shifts into the eastern 
great lakes through friday. expect a northerly wind shift to 
ramp up and increase to gales and nearing storm force at times 
friday on the backside of the departing low pressure while a 
strong high pressure around 30.7 inches builds to the west. a 
gale warning remains in effect for all of the open waters of 
lake michigan friday morning into friday night. 

widespread rain is expected this afternoon into tonight, with a 
few thunderstorms possible over the southern open waters. lake 
effect showers & a few thunderstorms may linger into friday 
along the back side of departing low pressure. a few waterspouts
are possible in the friday showers/thunderstorms, particularly 
over the southern half of lake michigan. 

as the high sinks toward the ohio river valley on saturday, strong low
pressure around 29.0 inches will develop in northern manitoba
through the weekend. the tight pressure gradient may bring 
southwest gales to lake michigan on sunday.


lmz080-669-671-673-675-777-779-870-872-874-876-878-160315-
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-
244 pm cdt thu oct 15 2026

sheboygan wi to pentwater mi south...

...gale warning in effect from friday morning through late friday
night...

.tonight...southeast winds 15 to 25 kt veering to northwest to
30 kt. showers and slight chance of thunderstorms this evening,
then slight chance of showers overnight. slight chance of
waterspouts overnight. waves 3 to 5 ft building to 8 to 12 ft
occasionally to 16 ft. 
.friday...northwest winds to 30 kt increasing to gales to 35 kt
late in the morning, then becoming north gales to 40 kt early in
the afternoon increasing to gales to 45 kt late. slight chance of
waterspouts. chance of showers in the morning, then showers in
the afternoon. waves 10 to 14 ft occasionally to 18 ft building
to 18 to 23 ft occasionally to 30 ft. 
.friday night...north gales to 45 kt diminishing to 30 kt. chance
of rain showers in the evening. waves 18 to 23 ft occasionally to
30 ft subsiding to 10 to 14 ft occasionally to 18 ft. 
.saturday...north winds 10 to 20 kt backing to southwest 15 to
25 kt. waves 7 to 10 ft occasionally to 13 ft subsiding to 4 to
6 ft occasionally to 8 ft. 
.saturday night...southwest winds to 30 kt. waves 7 to 10 ft
occasionally to 13 ft. 
.sunday...southwest gales to 35 kt increasing to gales to 40 kt.
waves 8 to 12 ft occasionally to 16 ft. 
.sunday night...southwest gales to 35 kt diminishing to 15 to
25 kt. waves 8 to 12 ft occasionally to 16 ft subsiding to 6 to
9 ft occasionally to 12 ft. 
.monday...southwest winds 10 to 20 kt. waves 4 to 6 ft
occasionally to 8 ft subsiding to 2 to 4 ft. 
.tuesday...southwest winds 5 to 10 kt backing to southeast. waves
1 to 2 ft.  

$$

fzus63 kmkx 151944
glflm 
expires:202610160315;;155814

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
244 pm cdt thu oct 15 2026

for waters beyond five nautical miles of shore on lake michigan.

waves are provided as a range of significant wave heights, which
is the average of the highest 1/3 of the wave, along with the
average height of the highest 10% of the waves which will
occasionally be encountered.

.synopsis...

two areas of low pressure are progged to merge over the great 
lakes region into a single low pressure later today into tonight
and deepen to around 29.4 inches as it shifts into the eastern 
great lakes through friday. expect a northerly wind shift to 
ramp up and increase to gales and nearing storm force at times 
friday on the backside of the departing low pressure while a 
strong high pressure around 30.7 inches builds to the west. a 
gale warning remains in effect for all of the open waters of 
lake michigan friday morning into friday night. 

widespread rain is expected this afternoon into tonight, with a 
few thunderstorms possible over the southern open waters. lake 
effect showers & a few thunderstorms may linger into friday 
along the back side of departing low pressure. a few waterspouts
are possible in the friday showers/thunderstorms, particularly 
over the southern half of lake michigan. 

as the high sinks toward the ohio river valley on saturday, strong low
pressure around 29.0 inches will develop in northern manitoba
through the weekend. the tight pressure gradient may bring 
southwest gales to lake michigan on sunday.


lmz261-362-364-366-563-565-567-868-160315-
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-
244 pm cdt thu oct 15 2026

sheboygan wi to pentwater mi north...

...gale warning in effect from friday morning through late friday
night...

.tonight...east winds 10 to 20 kt backing to northeast after
midnight, then becoming north to 30 kt late. showers. slight
chance of waterspouts overnight. waves 3 to 5 ft building to 5 to
8 ft occasionally to 10 ft. 
.friday...north winds to 30 kt increasing to gales to 45 kt.
slight chance of waterspouts. showers in the morning, then chance
of showers in the afternoon. waves 7 to 10 ft occasionally to
13 ft building to 14 to 18 ft occasionally to 23 ft. 
.friday night...north gales to 40 kt becoming northwest 10 to
20 kt. waves 14 to 18 ft occasionally to 23 ft subsiding to 6 to
9 ft occasionally to 12 ft. 
.saturday...west winds 15 to 25 kt becoming southwest to 30 kt.
waves 4 to 6 ft occasionally to 8 ft building to 5 to 8 ft
occasionally to 10 ft. 
.saturday night...southwest gales to 35 kt increasing to gales to
40 kt. waves 6 to 9 ft occasionally to 12 ft building to 8 to
12 ft occasionally to 16 ft. 
.sunday...southwest gales to 40 kt. waves 10 to 14 ft
occasionally to 18 ft. 
.sunday night...southwest gales to 40 kt. waves 8 to 12 ft
occasionally to 16 ft subsiding to 7 to 10 ft occasionally to
13 ft. 
.monday...southwest winds 15 to 25 kt diminishing to 10 to 20 kt.
waves 4 to 7 ft occasionally to 9 ft subsiding to 2 to 4 ft. 
.tuesday...northeast winds 5 to 10 kt becoming east. waves 1 to
2 ft.  

$$

fzus63 kmqt 152001
glfls 
expires:202610160800;;156240

open lake forecast for lake superior
national weather service marquette mi
401 pm edt thu oct 15 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

a phased 29.6 inch low forms over lower michigan tonight before 
lifting into southern ontario at 29.5 inches friday morning. in its 
wake, a 30.8 inch high lifting off of the central rockies tonight 
weakens to 30.6 inches on friday as it moves east over the plains. 
as it does so, the aforementioned low deepens to 29.4 inches and 
heads towards the mouth of the st. lawrence river. the high then 
slides south of the great lakes at 30.5 inches by saturday night as 
a 29.2 inch alberta clipper moves through the canadian prairies 
towards hudson bay, deepening to 29.0 inches by the time it arrives 
on sunday. this low is projected to bring troughing of 29.9 inches 
over lake superior on sunday. as the low moves east over hudson bay 
and weakens with time sunday night into monday, expect high pressure 
ridging of 30.3 inches to return to the upper great lakes by late 
monday. the high pressure ridging strengthens to 30.4 inches over 
lake superior by tuesday as the high pressure center at 30.5 inches 
over northern ontario lifts towards james bay. 




lsz162-160800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt thu oct 15 2026 /301 pm cdt thu oct 15 2026/

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

.late this afternoon...west winds 5 to 15 knots. rain. waves calm
to 2 feet. 
.tonight...northwest winds 5 to 15 knots becoming north 15 to
25 knots after midnight, then increasing to gales to 35 knots
late. a chance of rain. waves building to 6 to 9 feet
occasionally to 11 feet. 
.friday...north gales to 40 knots diminishing to 15 to 25 knots
late. waves building to 9 to 12 feet occasionally to 15 feet,
then subsiding to 3 to 6 feet occasionally to 8 feet. 
.friday night...northwest winds 10 to 20 knots backing west after
midnight, then increasing to 20 to 30 knots late. waves subsiding
to calm to 2 feet, then building to 3 to 5 feet occasionally to
7 feet. 
.saturday...southwest gales to 35 knots. waves building to 7 to
10 feet occasionally to 13 feet, then subsiding to 5 to 8 feet
occasionally to 10 feet. 
.saturday night...southwest gales to 35 knots. waves building to
7 to 10 feet occasionally to 13 feet. 
.sunday...southwest gales to 35 knots. waves building to 8 to
11 feet occasionally to 14 feet, then subsiding to 5 to 8 feet
occasionally to 10 feet. 
.sunday night...southwest winds 20 to 30 knots becoming west 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.monday...west winds 5 to 15 knots veering north. waves calm to
2 feet. 
.tuesday...east winds 5 to 15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 152001
glfls 
expires:202610160800;;156241

open lake forecast for lake superior
national weather service marquette mi
401 pm edt thu oct 15 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

a phased 29.6 inch low forms over lower michigan tonight before 
lifting into southern ontario at 29.5 inches friday morning. in its 
wake, a 30.8 inch high lifting off of the central rockies tonight 
weakens to 30.6 inches on friday as it moves east over the plains. 
as it does so, the aforementioned low deepens to 29.4 inches and 
heads towards the mouth of the st. lawrence river. the high then 
slides south of the great lakes at 30.5 inches by saturday night as 
a 29.2 inch alberta clipper moves through the canadian prairies 
towards hudson bay, deepening to 29.0 inches by the time it arrives 
on sunday. this low is projected to bring troughing of 29.9 inches 
over lake superior on sunday. as the low moves east over hudson bay 
and weakens with time sunday night into monday, expect high pressure 
ridging of 30.3 inches to return to the upper great lakes by late 
monday. the high pressure ridging strengthens to 30.4 inches over 
lake superior by tuesday as the high pressure center at 30.5 inches 
over northern ontario lifts towards james bay. 




lsz263-160800-
lake superior from saxon harbor wi to upper entrance to portage
canal mi 5nm off shore to the us/canadian border including isle
royale national park-
401 pm edt thu oct 15 2026

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

.late this afternoon...south winds 5 to 15 knots. rain. waves
calm to 2 feet. 
.tonight...northwest winds 5 to 15 knots becoming north 20 to
30 knots after midnight, then increasing to gales to 40 knots
late. rain. waves building to 8 to 11 feet occasionally to
14 feet. 
.friday...north gales to 40 knots diminishing to 20 to 30 knots
late. a chance of rain showers through early afternoon. waves
building to 11 to 15 feet occasionally to 19 feet, then subsiding
to 5 to 8 feet occasionally to 10 feet. 
.friday night...northwest winds 15 to 25 knots becoming west 5 to
15 knots after midnight, then increasing to 20 to 30 knots late.
waves subsiding to 1 to 3 feet, then building to 3 to 6 feet
occasionally to 8 feet. 
.saturday...southwest gales to 35 knots. waves building to 8 to
11 feet occasionally to 14 feet, then subsiding to 6 to 9 feet
occasionally to 11 feet. 
.saturday night...southwest gales to 40 knots. waves subsiding to
5 to 8 feet occasionally to 10 feet, then building to 8 to
11 feet occasionally to 14 feet. 
.sunday...southwest gales to 40 knots. waves building to 9 to
12 feet occasionally to 15 feet, then subsiding to 6 to 9 feet
occasionally to 11 feet. 
.sunday night...southwest gales to 35 knots becoming west 10 to
20 knots after midnight. waves subsiding to 1 to 3 feet. 
.monday...west winds 5 to 15 knots. waves subsiding to calm to
2 feet. 
.tuesday...east winds 5 to 15 knots veering southeast. waves calm
to 2 feet. 

$$

fzus63 kmqt 152001
glfls 
expires:202610160800;;156242

open lake forecast for lake superior
national weather service marquette mi
401 pm edt thu oct 15 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

a phased 29.6 inch low forms over lower michigan tonight before 
lifting into southern ontario at 29.5 inches friday morning. in its 
wake, a 30.8 inch high lifting off of the central rockies tonight 
weakens to 30.6 inches on friday as it moves east over the plains. 
as it does so, the aforementioned low deepens to 29.4 inches and 
heads towards the mouth of the st. lawrence river. the high then 
slides south of the great lakes at 30.5 inches by saturday night as 
a 29.2 inch alberta clipper moves through the canadian prairies 
towards hudson bay, deepening to 29.0 inches by the time it arrives 
on sunday. this low is projected to bring troughing of 29.9 inches 
over lake superior on sunday. as the low moves east over hudson bay 
and weakens with time sunday night into monday, expect high pressure 
ridging of 30.3 inches to return to the upper great lakes by late 
monday. the high pressure ridging strengthens to 30.4 inches over 
lake superior by tuesday as the high pressure center at 30.5 inches 
over northern ontario lifts towards james bay. 




lsz264-160800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
401 pm edt thu oct 15 2026

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

.late this afternoon...south winds 5 to 15 knots. rain. waves
1 to 3 feet. 
.tonight...southeast winds 5 to 15 knots becoming northeast 15 to
25 knots after midnight, then becoming north gales to 35 knots
late. rain. waves subsiding to calm to 2 feet, then building to
7 to 10 feet occasionally to 13 feet. 
.friday...north gales to 45 knots. a slight chance of rain
showers through early afternoon. waves building to 11 to 15 feet
occasionally to 19 feet, then subsiding to 7 to 10 feet
occasionally to 13 feet. 
.friday night...northwest winds 20 to 30 knots diminishing to
10 to 20 knots after midnight, then becoming west 20 to 30 knots
late. waves subsiding to 1 to 3 feet, then building to 3 to
5 feet occasionally to 7 feet. 
.saturday...west gales to 35 knots backing southwest by mid
afternoon. waves building to 7 to 11 feet occasionally to
14 feet. 
.saturday night...southwest gales to 40 knots. waves subsiding to
5 to 8 feet occasionally to 10 feet, then building to 8 to
11 feet occasionally to 14 feet. 
.sunday...southwest gales to 40 knots. waves building to 9 to
12 feet occasionally to 15 feet, then subsiding to 7 to 10 feet
occasionally to 13 feet. 
.sunday night...west gales to 35 knots diminishing to 15 to
25 knots after midnight. waves subsiding to 1 to 3 feet. 
.monday...west winds 5 to 15 knots diminishing to less than
10 knots. waves subsiding to calm to 2 feet. 
.tuesday...east winds 5 to 15 knots veering southeast. waves calm
to 2 feet. 

$$

fzus63 kmqt 152001
glfls 
expires:202610160800;;156243

open lake forecast for lake superior
national weather service marquette mi
401 pm edt thu oct 15 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

a phased 29.6 inch low forms over lower michigan tonight before 
lifting into southern ontario at 29.5 inches friday morning. in its 
wake, a 30.8 inch high lifting off of the central rockies tonight 
weakens to 30.6 inches on friday as it moves east over the plains. 
as it does so, the aforementioned low deepens to 29.4 inches and 
heads towards the mouth of the st. lawrence river. the high then 
slides south of the great lakes at 30.5 inches by saturday night as 
a 29.2 inch alberta clipper moves through the canadian prairies 
towards hudson bay, deepening to 29.0 inches by the time it arrives 
on sunday. this low is projected to bring troughing of 29.9 inches 
over lake superior on sunday. as the low moves east over hudson bay 
and weakens with time sunday night into monday, expect high pressure 
ridging of 30.3 inches to return to the upper great lakes by late 
monday. the high pressure ridging strengthens to 30.4 inches over 
lake superior by tuesday as the high pressure center at 30.5 inches 
over northern ontario lifts towards james bay. 




lsz265-160800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
401 pm edt thu oct 15 2026

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

.late this afternoon...southeast winds 10 to 20 knots. rain.
waves calm to 2 feet. 
.tonight...southeast winds 5 to 15 knots becoming northeast 10 to
20 knots after midnight, then becoming north gales to 35 knots
late. rain. waves building to 4 to 7 feet occasionally to 9 feet.
.friday...north gales to 45 knots. a chance of showers. waves
building to 15 to 20 feet occasionally to 25 feet, then subsiding
to 10 to 14 feet occasionally to 18 feet. 
.friday night...north gales to 35 knots becoming northwest 15 to
25 knots after midnight, then backing west late. waves subsiding
to 2 to 4 feet. 
.saturday...west winds 20 to 30 knots backing southwest by mid
afternoon. waves building to 3 to 6 feet occasionally to 8 feet,
then subsiding to 2 to 4 feet. 
.saturday night...southwest winds 20 to 30 knots. waves subsiding
to 1 to 3 feet, then building to 3 to 5 feet occasionally to
7 feet. 
.sunday...southwest winds 20 to 30 knots. waves subsiding to 2 to
4 feet. 
.sunday night...southwest winds 20 to 30 knots becoming west
15 to 25 knots after midnight. waves subsiding to calm to 2 feet.
.monday...west winds 5 to 15 knots. waves calm to 2 feet. 
.tuesday...east winds 5 to 15 knots becoming southeast 10 to
20 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 152001
glfls 
expires:202610160800;;156244

open lake forecast for lake superior
national weather service marquette mi
401 pm edt thu oct 15 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

a phased 29.6 inch low forms over lower michigan tonight before 
lifting into southern ontario at 29.5 inches friday morning. in its 
wake, a 30.8 inch high lifting off of the central rockies tonight 
weakens to 30.6 inches on friday as it moves east over the plains. 
as it does so, the aforementioned low deepens to 29.4 inches and 
heads towards the mouth of the st. lawrence river. the high then 
slides south of the great lakes at 30.5 inches by saturday night as 
a 29.2 inch alberta clipper moves through the canadian prairies 
towards hudson bay, deepening to 29.0 inches by the time it arrives 
on sunday. this low is projected to bring troughing of 29.9 inches 
over lake superior on sunday. as the low moves east over hudson bay 
and weakens with time sunday night into monday, expect high pressure 
ridging of 30.3 inches to return to the upper great lakes by late 
monday. the high pressure ridging strengthens to 30.4 inches over 
lake superior by tuesday as the high pressure center at 30.5 inches 
over northern ontario lifts towards james bay. 




lsz266-160800-
lake superior east of a line from manitou island to marquette mi
and west of a line from grand marais mi to the us/canadian border
beyond 5nm from shore-
401 pm edt thu oct 15 2026

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

.late this afternoon...southeast winds 10 to 20 knots. rain.
waves 1 to 3 feet. 
.tonight...southeast winds 5 to 15 knots becoming northeast 10 to
20 knots after midnight, then becoming north gales to 35 knots
late. rain. waves subsiding to calm to 2 feet, then building to
4 to 7 feet occasionally to 9 feet. 
.friday...north gales to 45 knots. a chance of showers. waves
building to 15 to 20 feet occasionally to 25 feet, then subsiding
to 12 to 17 feet occasionally to 21 feet. 
.friday night...north gales to 35 knots becoming northwest 15 to
25 knots after midnight, then backing west late. a slight chance
of rain showers. waves subsiding to 3 to 5 feet occasionally to
7 feet. 
.saturday...west gales to 35 knots backing southwest by mid
afternoon. waves building to 7 to 11 feet occasionally to
14 feet. 
.saturday night...southwest winds 20 to 30 knots. waves subsiding
to 4 to 8 feet occasionally to 10 feet. 
.sunday...southwest winds 20 to 30 knots. waves building to 6 to
10 feet occasionally to 13 feet. 
.sunday night...southwest winds 20 to 30 knots becoming west
10 to 20 knots after midnight. waves subsiding to 2 to 4 feet. 
.monday...west winds 5 to 15 knots. waves subsiding to calm to
2 feet. 
.tuesday...east winds 5 to 15 knots veering southeast. waves calm
to 2 feet. 

$$

fzus63 kmqt 152001
glfls 
expires:202610160800;;156245

open lake forecast for lake superior
national weather service marquette mi
401 pm edt thu oct 15 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

a phased 29.6 inch low forms over lower michigan tonight before 
lifting into southern ontario at 29.5 inches friday morning. in its 
wake, a 30.8 inch high lifting off of the central rockies tonight 
weakens to 30.6 inches on friday as it moves east over the plains. 
as it does so, the aforementioned low deepens to 29.4 inches and 
heads towards the mouth of the st. lawrence river. the high then 
slides south of the great lakes at 30.5 inches by saturday night as 
a 29.2 inch alberta clipper moves through the canadian prairies 
towards hudson bay, deepening to 29.0 inches by the time it arrives 
on sunday. this low is projected to bring troughing of 29.9 inches 
over lake superior on sunday. as the low moves east over hudson bay 
and weakens with time sunday night into monday, expect high pressure 
ridging of 30.3 inches to return to the upper great lakes by late 
monday. the high pressure ridging strengthens to 30.4 inches over 
lake superior by tuesday as the high pressure center at 30.5 inches 
over northern ontario lifts towards james bay. 




lsz267-160800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
401 pm edt thu oct 15 2026

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

.late this afternoon...southeast winds 10 to 20 knots. rain.
waves 1 to 3 feet. 
.tonight...southeast winds 10 to 20 knots backing east after
midnight, then becoming northeast 15 to 25 knots late. rain.
waves building to 3 to 5 feet occasionally to 7 feet. 
.friday...north gales to 40 knots. a chance of showers. waves
building to 10 to 14 feet occasionally to 18 feet. 
.friday night...north gales to 35 knots diminishing to 15 to
25 knots after midnight, then becoming west 10 to 20 knots late.
a slight chance of rain showers. waves subsiding to 3 to 5 feet
occasionally to 7 feet. 
.saturday...west winds 15 to 25 knots becoming southwest 20 to
30 knots by mid afternoon. waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet. 
.saturday night...southwest winds 20 to 30 knots. waves building
to 4 to 7 feet occasionally to 9 feet. 
.sunday...southwest gales to 35 knots diminishing to 20 to
30 knots by mid afternoon. waves building to 5 to 8 feet
occasionally to 10 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet. 
.sunday night...southwest winds 20 to 30 knots diminishing to
15 to 25 knots after midnight. waves subsiding to 2 to 4 feet. 
.monday...west winds 5 to 15 knots. waves subsiding to calm to
2 feet. 
.tuesday...northeast winds 5 to 15 knots veering southeast. waves
calm to 2 feet. 

$$