fzus61 kbuf 100202
glflo 
expires:202510100900;;407836

open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt thu oct 9 2025

for waters beyond five nautical miles of shore on lake ontario

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

.synopsis...a 30.4 inch high will build from the lower great lakes 
to off the new england coastline by friday, where it will linger 
through saturday. another 30.4 inch high will then build across 
quebec on sunday and monday, while a deepening 29.4 inch low slowly 
drifts north offshore of the carolinas and to the southern mid-
atlantic coastline.


loz062-100900-
lake ontario open waters from the niagara river to hamlin beach-
1002 pm edt thu oct 9 2025

.overnight...southeast winds 5 to 10 knots becoming south.
waves 1 foot or less. 
.friday...south winds 5 to 15 knots. waves 2 feet or less. 
.friday night...south winds 10 to 15 knots. a chance of showers.
waves 1 to 3 feet. 
.saturday...south winds 10 to 15 knots becoming east. a chance of
showers. waves 1 to 2 feet. 
.saturday night...east winds 10 to 15 knots increasing to 15 to
20 knots. showers likely. waves 2 to 4 feet. 
.sunday...east winds 15 to 25 knots. showers likely. waves 3 to
6 feet building to 4 to 7 feet. waves occasionally around 9 feet.
.monday...east winds 15 to 20 knots becoming northeast 5 to
15 knots. a chance of showers. waves 4 to 7 feet subsiding to
1 to 3 feet. waves occasionally around 9 feet. 
.tuesday...north winds 5 to 15 knots becoming northwest. a chance
of showers tuesday night. waves 2 feet or less. 

$$

fzus61 kbuf 100202
glflo 
expires:202510100900;;407837

open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt thu oct 9 2025

for waters beyond five nautical miles of shore on lake ontario

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

.synopsis...a 30.4 inch high will build from the lower great lakes 
to off the new england coastline by friday, where it will linger 
through saturday. another 30.4 inch high will then build across 
quebec on sunday and monday, while a deepening 29.4 inch low slowly 
drifts north offshore of the carolinas and to the southern mid-
atlantic coastline.


loz063>065-100900-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 pm edt thu oct 9 2025

.overnight...east winds 5 to 10 knots becoming south. waves
2 feet or less. 
.friday...south winds 10 to 15 knots. waves 1 to 3 feet. 
.friday night...south winds 15 to 25 knots. a chance of showers
overnight. waves 1 to 3 feet building to 3 to 5 feet. 
.saturday...south winds 15 to 20 knots becoming east 10 to
15 knots. a chance of showers. waves 2 to 4 feet subsiding to
1 to 3 feet. 
.saturday night...east winds 10 to 15 knots increasing to 15 to
20 knots. a chance of showers. waves 1 to 3 feet building to 2 to
4 feet. 
.sunday...east winds 15 to 25 knots. a chance of showers during
the day, then showers likely sunday night. waves 2 to 4 feet
building to 4 to 7 feet. waves occasionally around 9 feet. 
.monday...northeast winds 15 to 25 knots diminishing to 10 to
15 knots. showers likely during the day, then a chance of showers
monday night. waves 4 to 7 feet subsiding to 1 to 3 feet. waves
occasionally around 9 feet. 
.tuesday...north winds 5 to 15 knots becoming northwest. a chance
of showers. waves 1 to 3 feet. 

$$

fzus61 kcle 100126
glfle 
expires:202510100815;;407074

open lake forecast for lake erie
national weather service cleveland oh
926 pm edt thu oct 9 2025

for waters beyond five nautical miles of shore on lake erie

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

.synopsis...
high pressure 30.40 inches over the northeast will remain in
control through friday night. on saturday, a weak low of 29.90 
inches should drift southeastward across the northern great lakes 
and vicinity, and allow the trailing cold front to begin to sweep 
eastward across western lake erie. during sunday, the low should 
drift farther southeastward to lake erie, devolve into a trough 
averaging 30.00 inches over lake erie and the upper ohio valley, 
and the cold front should dissipate over and near central lake 
erie. a ridge averaging 30.20 inches should then build generally 
from the west sunday night through this tuesday.


lez164>167-100815-
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-
926 pm edt thu oct 9 2025

.overnight...east winds 10 to 15 knots becoming southeast.
waves 1 to 3 feet. 
.friday...south winds 15 to 20 knots diminishing to 10 to
15 knots. waves 1 to 3 feet. 
.friday night...south winds 15 to 20 knots becoming southwest. a
chance of showers in the evening, then showers likely overnight.
waves 1 to 3 feet building to 3 to 5 feet. 
.saturday...south winds 15 to 20 knots diminishing to 10 to
15 knots. showers likely. waves 3 to 5 feet subsiding to 1 to
3 feet. 
.saturday night...southeast winds 10 to 15 knots. showers likely
in the evening, then a chance of showers overnight. waves 2 feet
or less. 
.sunday...southeast winds 10 to 15 knots becoming east 15 to
20 knots. a chance of showers. waves 1 to 3 feet building to 3 to
5 feet. 
.monday...east winds 5 to 15 knots becoming northeast. waves 2 to
4 feet subsiding to 1 to 2 feet. 
.tuesday...northeast winds 5 to 15 knots becoming north. waves
1 to 3 feet. 

$$

fzus61 kcle 100126
glfle 
expires:202510100815;;407075

open lake forecast for lake erie
national weather service cleveland oh
926 pm edt thu oct 9 2025

for waters beyond five nautical miles of shore on lake erie

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

.synopsis...
high pressure 30.40 inches over the northeast will remain in
control through friday night. on saturday, a weak low of 29.90 
inches should drift southeastward across the northern great lakes 
and vicinity, and allow the trailing cold front to begin to sweep 
eastward across western lake erie. during sunday, the low should 
drift farther southeastward to lake erie, devolve into a trough 
averaging 30.00 inches over lake erie and the upper ohio valley, 
and the cold front should dissipate over and near central lake 
erie. a ridge averaging 30.20 inches should then build generally 
from the west sunday night through this tuesday.


lez061-168-169-100815-
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-
926 pm edt thu oct 9 2025

.overnight...east winds 10 to 15 knots becoming south.
waves 1 to 2 feet. 
.friday...south winds 15 to 20 knots diminishing to 10 to
15 knots. waves 1 to 3 feet. 
.friday night...south winds 10 to 15 knots increasing to 15 to
20 knots. a chance of showers overnight. waves 1 to 3 feet
building to 2 to 4 feet. 
.saturday...south winds 15 to 20 knots becoming southeast 5 to
15 knots. a chance of showers in the morning, then showers likely
in the afternoon. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.saturday night...east winds 5 to 15 knots becoming southeast.
showers likely. waves 1 to 2 feet. 
.sunday...east winds 10 to 15 knots increasing to 15 to 20 knots.
showers likely. waves 1 to 3 feet building to 2 to 4 feet. 
.monday...northeast winds 5 to 15 knots. waves 1 to 3 feet. 
.tuesday...northeast winds 5 to 10 knots becoming north. a chance
of showers tuesday night. waves 2 feet or less. 

$$

fzus61 kcle 100126
glfle 
expires:202510100815;;407073

open lake forecast for lake erie
national weather service cleveland oh
926 pm edt thu oct 9 2025

for waters beyond five nautical miles of shore on lake erie

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

.synopsis...
high pressure 30.40 inches over the northeast will remain in
control through friday night. on saturday, a weak low of 29.90 
inches should drift southeastward across the northern great lakes 
and vicinity, and allow the trailing cold front to begin to sweep 
eastward across western lake erie. during sunday, the low should 
drift farther southeastward to lake erie, devolve into a trough 
averaging 30.00 inches over lake erie and the upper ohio valley, 
and the cold front should dissipate over and near central lake 
erie. a ridge averaging 30.20 inches should then build generally 
from the west sunday night through this tuesday.


lez162-163-100815-
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-
926 pm edt thu oct 9 2025

.overnight...east winds 5 to 10 knots becoming south. waves
2 feet or less. 
.friday...south winds 5 to 10 knots becoming southwest. waves
2 feet or less. 
.friday night...south winds 10 to 15 knots becoming southwest
15 to 20 knots. a chance of showers. waves 1 to 3 feet. 
.saturday...southwest winds 5 to 15 knots becoming north. a
chance of showers. waves 2 feet or less. 
.saturday night...northeast winds 5 to 10 knots becoming east. a
chance of showers. waves 1 foot or less. 
.sunday...east winds 10 to 15 knots. waves 1 to 3 feet. 
.monday...northeast winds 5 to 10 knots becoming southeast. waves
1 to 3 feet subsiding to 1 foot or less. 
.tuesday...northwest winds 5 to 10 knots becoming north. waves
2 feet or less. 

$$

fzus63 kdtx 100140
glfsc 
expires:202510100945;;407318

lake st clair forecast
national weather service detroit/pontiac mi
940 pm edt thu oct 9 2025

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

.synopsis...high pressure, 30.50 inches, peels away from the
region by early friday morning with weakening low pressure,
averaging 29.90 inches, quickly trailing in its wake. this low
crosses the region late friday through saturday bringing a period
of unsettled weather including waterspout chances. weak induced
ridging then develops by late weekend.


lcz460-100945-
lake st clair-
940 pm edt thu oct 9 2025

.rest of tonight...southeast winds 5 to 10 knots. mostly clear.
waves 2 feet or less.
.friday...south winds 5 to 10 knots increasing to 10 to 15 knots in
the afternoon. mostly sunny. waves 2 feet or less.
.friday night...southwest winds 10 to 15 knots. partly cloudy early
in the evening becoming mostly cloudy. a chance of light showers.
waves 2 feet or less.
.saturday...west winds 10 to 15 knots diminishing to 5 to 10 knots
in the late morning and early afternoon...then veering to the north
early in the afternoon. partly sunny. a chance of light showers.
waves 2 feet or less.
.saturday night...northeast winds 5 to 10 knots. partly cloudy. a
chance of light showers. waves 2 feet or less.
.sunday...east winds 5 to 10 knots increasing to 10 to 15 knots in
the afternoon and evening. partly sunny in the morning becoming
mostly clear. waves 2 feet or less.
.monday...east winds 10 to 15 knots. mostly clear. waves 2 feet or
less.
.tuesday...north winds 10 to 15 knots. mostly clear. waves 2 feet or
less.

$$

fzus63 kdtx 100140
glflh 
expires:202510100945;;407314

open lake forecast for lake huron
national weather service detroit/pontiac mi
940 pm edt thu oct 9 2025

for waters beyond five nautical miles off shore on lake huron

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

.synopsis...high pressure, 30.50 inches, peels away from the
region by early friday morning with weakening low pressure,
averaging 29.90 inches, quickly trailing in its wake. this low
crosses the region late friday through saturday bringing a period
of unsettled weather including waterspout chances. weak induced
ridging then develops by late weekend.


lhz361-100945-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
940 pm edt thu oct 9 2025

.rest of tonight...south winds 10 to 15 knots. waves 1 to 3 feet
building to 2 to 4 feet after midnight. 
.friday...south winds 10 to 15 knots increasing to 15 to 20 knots
late in the morning...then decreasing to 10 to 15 knots in the
afternoon. a chance of showers. waves 3 to 5 feet. 
.friday night...southwest winds 10 to 15 knots veering to the
west after midnight. a chance of waterspouts in the evening. a
chance of showers. waves 3 to 5 feet subsiding to 2 to 4 feet
after midnight. 
.saturday...northeast winds 10 to 15 knots. a chance of showers
in the afternoon. waves 1 to 3 feet building to 2 to 4 feet in
the late morning and afternoon. 
.saturday night...east winds 5 to 10 knots increasing to 10 to
15 knots after midnight. waves 2 to 4 feet subsiding to 1 to
3 feet in the late evening and overnight. 
.sunday...east winds 10 to 15 knots. waves 2 to 4 feet. 
.monday...southeast winds 10 to 15 knots decreasing to 5 to
10 knots until early morning. a chance of showers until early
morning. waves 2 to 4 feet subsiding to 1 to 3 feet in the late
evening and early morning. 
.tuesday...southwest winds 5 to 10 knots becoming northwest 10 to
15 knots. waves 1 to 3 feet building to 2 to 4 feet until early
morning. 


$$

fzus63 kdtx 100140
glflh 
expires:202510100945;;407315

open lake forecast for lake huron
national weather service detroit/pontiac mi
940 pm edt thu oct 9 2025

for waters beyond five nautical miles off shore on lake huron

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

.synopsis...high pressure, 30.50 inches, peels away from the
region by early friday morning with weakening low pressure,
averaging 29.90 inches, quickly trailing in its wake. this low
crosses the region late friday through saturday bringing a period
of unsettled weather including waterspout chances. weak induced
ridging then develops by late weekend.


lhz362-363-100945-
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-
940 pm edt thu oct 9 2025

.rest of tonight...south winds 10 to 15 knots increasing to 15 to
20 knots early in the morning. waves 1 to 3 feet building to 2 to
4 feet after midnight. 
.friday...south winds 15 to 20 knots. a chance of. waves 4 to
6 feet. waves occasionally around 8 feet. 
.friday night...south winds 15 to 20 knots decreasing to 10 to
15 knots in the late evening and overnight. a chance of showers.
a chance of waterspouts after midnight. waves 4 to 6 feet. 
.saturday...north winds 10 to 15 knots veering to the northeast
in the late morning and afternoon. a chance of waterspouts in the
morning. a chance of showers. waves 2 to 4 feet. waves
occasionally around 8 feet. 
.saturday night...east winds 10 to 15 knots. a chance of showers
in the evening. waves 2 to 4 feet. 
.sunday...east winds 10 to 15 knots. waves 2 to 4 feet. 
.monday...southeast winds 10 to 15 knots becoming east 5 to
10 knots until early morning. waves 2 to 4 feet subsiding to 1 to
3 feet until early morning. 
.tuesday...southwest winds 5 to 10 knots becoming west 10 to
15 knots in the late morning and early afternoon...then becoming
northwest 15 to 20 knots until early morning. waves 1 to 3 feet
building to 3 to 5 feet until early morning. 


$$

fzus63 kdtx 100140
glflh 
expires:202510100945;;407316

open lake forecast for lake huron
national weather service detroit/pontiac mi
940 pm edt thu oct 9 2025

for waters beyond five nautical miles off shore on lake huron

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

.synopsis...high pressure, 30.50 inches, peels away from the
region by early friday morning with weakening low pressure,
averaging 29.90 inches, quickly trailing in its wake. this low
crosses the region late friday through saturday bringing a period
of unsettled weather including waterspout chances. weak induced
ridging then develops by late weekend.


lhz462>464-100945-
lake huron from port austin to harbor beach beyond 5nm off shore-
lake huron from harbor beach to port sanilac beyond 5nm off shore-
lake huron from port sanilac to port huron beyond 5nm off shore-
940 pm edt thu oct 9 2025

.rest of tonight...southeast winds 5 to 10 knots increasing to
10 to 15 knots after midnight. waves 1 to 3 feet building to 2 to
4 feet early in the morning. 
.friday...south winds 10 to 15 knots increasing to 15 to 20 knots
late in the afternoon. a chance of. waves 2 to 4 feet. 
.friday night...south winds 15 to 20 knots becoming southwest
10 to 15 knots in the late evening and overnight. a chance of
showers. waves 3 to 5 feet. 
.saturday...south winds 10 to 15 knots backing to the east in the
late morning and afternoon. a chance of showers. a chance of
waterspouts in the afternoon. waves 2 to 4 feet subsiding to 1 to
3 feet early in the afternoon. 
.saturday night...east winds 10 to 15 knots. a chance of showers.
waves 1 to 3 feet. 
.sunday...east winds 10 to 15 knots. waves 2 to 4 feet. 
.monday...east winds 10 to 15 knots decreasing to 5 to 10 knots.
waves 1 to 3 feet. 
.tuesday...south winds 5 to 10 knots veering to the west in the
late morning and early afternoon...then becoming north 10 to
15 knots until early morning. waves 2 feet or less building to
3 to 5 feet until early morning. 


$$

fzus63 kmkx 100144
glflm 
expires:202510100915;;407343

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
844 pm cdt thu oct 9 2025

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

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

.synopsis...

a cold front will progress into the upper mississippi river valley 
tonight, resulting in increasing southerly winds through friday 
morning across the open waters. southerlies will become particularly 
gusty following sunrise, when widespread 25-30 knot readings are 
forecast. gusts will be strongest over the northern third of lake 
michigan, where a few gales will be possible between ~7 am-1 pm cdt. 
any such gusts will be brief, with conditions not expected to be 
widespread enough to warrant gale warnings. the aforementioned cold 
front will cross the waters friday afternoon, resulting in a 
northwest wind shift. showers and isolated thunderstorms will be 
possible during the frontal passage, with severe weather not 
expected. breezy north-northwest winds will continue friday night, 
gradually tapering during the day saturday as 30.2 inch high 
pressure moves across lake michigan. winds will turn out of the 
southeast sunday, when 29.2 inch low pressure is forecast to form
over the northern great plains. the low will advance toward the 
hudson bay by monday evening, dragging a cold front across lake 
michigan in the process. additional showers and isolated 
thunderstorms will accompany the passing front, with severe 
weather not expected at this time. 


lmz080-669-671-673-675-777-779-870-872-874-876-878-100915-
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-
844 pm cdt thu oct 9 2025

sheboygan wi to pentwater mi south...

.rest of tonight...southeast winds 10 to 20 kt becoming south
15 to 25 kt. waves 3 to 5 ft building to 4 to 7 ft occasionally
to 9 ft. 
.friday...south winds to 30 kt becoming southwest. isolated
showers. waves 8 to 11 ft occasionally to 14 ft. 
.friday night...west winds 15 to 25 kt becoming north 10 to
20 kt. chance of showers in the evening. waves 7 to 10 ft
occasionally to 13 ft. 
.saturday...north winds 10 to 20 kt. waves 4 to 7 ft occasionally
to 9 ft subsiding to 4 to 6 ft occasionally to 8 ft. 
.saturday night...northeast winds 10 to 15 kt becoming east.
waves 2 to 4 ft. 
.sunday...east winds 10 to 20 kt becoming southeast. waves 2 to
4 ft. 
.sunday night...southeast winds 10 to 20 kt increasing to 15 to
25 kt. waves 3 to 5 ft building to 4 to 7 ft occasionally to
9 ft. 
.monday...southeast winds 15 to 25 kt becoming south 10 to 20 kt.
waves 5 to 8 ft occasionally to 10 ft subsiding to 4 to 7 ft
occasionally to 9 ft. 
.tuesday...north winds 10 to 20 kt. waves 4 to 6 ft occasionally
to 8 ft.  

$$

fzus63 kmkx 100144
glflm 
expires:202510100915;;407342

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
844 pm cdt thu oct 9 2025

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

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

.synopsis...

a cold front will progress into the upper mississippi river valley 
tonight, resulting in increasing southerly winds through friday 
morning across the open waters. southerlies will become particularly 
gusty following sunrise, when widespread 25-30 knot readings are 
forecast. gusts will be strongest over the northern third of lake 
michigan, where a few gales will be possible between ~7 am-1 pm cdt. 
any such gusts will be brief, with conditions not expected to be 
widespread enough to warrant gale warnings. the aforementioned cold 
front will cross the waters friday afternoon, resulting in a 
northwest wind shift. showers and isolated thunderstorms will be 
possible during the frontal passage, with severe weather not 
expected. breezy north-northwest winds will continue friday night, 
gradually tapering during the day saturday as 30.2 inch high 
pressure moves across lake michigan. winds will turn out of the 
southeast sunday, when 29.2 inch low pressure is forecast to form
over the northern great plains. the low will advance toward the 
hudson bay by monday evening, dragging a cold front across lake 
michigan in the process. additional showers and isolated 
thunderstorms will accompany the passing front, with severe 
weather not expected at this time. 


lmz261-362-364-366-563-565-567-868-100915-
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-
844 pm cdt thu oct 9 2025

sheboygan wi to pentwater mi north...

.rest of tonight...south winds 10 to 20 kt increasing to 30 kt.
waves 3 to 5 ft building to 4 to 7 ft occasionally to 9 ft. 
.friday...southwest winds to 30 kt becoming west. scattered
showers. waves 7 to 10 ft occasionally to 13 ft building to 8 to
11 ft occasionally to 14 ft. 
.friday night...northwest winds to 30 kt becoming north 15 to
25 kt. chance of showers in the evening. waves 6 to 9 ft
occasionally to 12 ft subsiding to 4 to 7 ft occasionally to
9 ft. 
.saturday...northeast winds 10 to 20 kt. waves 4 to 6 ft
occasionally to 8 ft subsiding to 3 to 5 ft. 
.saturday night...east winds 10 to 20 kt becoming southeast 10 to
15 kt. waves 1 to 3 ft. 
.sunday...southeast winds 10 to 20 kt increasing to 15 to 25 kt.
waves 2 to 4 ft. 
.sunday night...southeast winds 15 to 25 kt. waves 3 to 5 ft
building to 4 to 7 ft occasionally to 9 ft. 
.monday...south winds 15 to 25 kt diminishing to 10 to 20 kt.
chance of showers. waves 5 to 8 ft occasionally to 10 ft. 
.tuesday...north winds 10 to 20 kt becoming northwest. waves 2 to
4 ft.  

$$

fzus63 kmqt 100207 cca
glfls 
expires:202510100800;;408060

open lake forecast for lake superior...corrected
national weather service marquette mi
1007 pm edt thu oct 9 2025

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

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

.synopsis...

30.5 inch high pressure continues to slide eastward this evening, 
becoming centered over new england later tonight. this allows a 30.0 
inch trough to move into the upper great lakes as a 29.4 inch low 
moves over hudson bay. along this trough, a 29.9 inch low develops 
near thunder bay, then moves over lake superior friday afternoon and 
evening. the low then drops into lower michigan friday night and 
saturday while 30.2 inch ridging builds over lake superior. this 
ridge gradually weakens through the weekend as the next system 
organizes upstream in the northern plains. by early monday, a 
weakening 29.4 inch low pressure moves from manitoba into northern 
ontario, causing a 29.8 to 29.9 inch trough to move over lake 
superior before ridging returns late monday into tuesday, building 
to 30.4 inches by tuesday morning.



lsz162-100800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1007 pm edt thu oct 9 2025 /907 pm cdt thu oct 9 2025/

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

$$

fzus63 kmqt 100207 cca
glfls 
expires:202510100800;;408061

open lake forecast for lake superior...corrected
national weather service marquette mi
1007 pm edt thu oct 9 2025

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

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

.synopsis...

30.5 inch high pressure continues to slide eastward this evening, 
becoming centered over new england later tonight. this allows a 30.0 
inch trough to move into the upper great lakes as a 29.4 inch low 
moves over hudson bay. along this trough, a 29.9 inch low develops 
near thunder bay, then moves over lake superior friday afternoon and 
evening. the low then drops into lower michigan friday night and 
saturday while 30.2 inch ridging builds over lake superior. this 
ridge gradually weakens through the weekend as the next system 
organizes upstream in the northern plains. by early monday, a 
weakening 29.4 inch low pressure moves from manitoba into northern 
ontario, causing a 29.8 to 29.9 inch trough to move over lake 
superior before ridging returns late monday into tuesday, building 
to 30.4 inches by tuesday morning.



lsz263-100800-
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-
1007 pm edt thu oct 9 2025

...gale warning in effect from 8 am edt friday through friday
evening...

.rest of tonight...south winds 15 to 25 knots becoming southwest
20 to 30 knots after midnight. a chance of showers. waves 2 to
4 feet building to 3 to 6 feet occasionally to 8 feet. 
.friday...west gales to 35 knots veering northwest in the
afternoon. a chance of showers. waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet. 
.friday night...north winds 20 to 30 knots diminishing to 15 to
25 knots after midnight, then becoming northeast 10 to 20 knots
late. waves subsiding to 2 to 4 feet. 
.saturday...east winds 5 to 15 knots. waves subsiding to calm to
2 feet. 
.saturday night...southeast winds 10 to 20 knots becoming south
15 to 25 knots after midnight. waves building to 2 to 4 feet. 
.sunday...southeast winds 15 to 25 knots increasing to 20 to
30 knots by mid afternoon. waves building to 4 to 7 feet
occasionally to 9 feet. 
.sunday night...southeast gales to 35 knots veering south after
midnight. a chance of showers through midnight, then showers
likely after midnight. waves building to 4 to 8 feet occasionally
to 10 feet. 
.monday...southwest gales to 35 knots becoming west 20 to
30 knots. waves building to 5 to 8 feet occasionally to 10 feet,
then subsiding to 3 to 6 feet occasionally to 8 feet. 
.tuesday...northwest winds 15 to 25 knots becoming north 10 to
20 knots. waves subsiding to calm to 2 feet. 

$$

fzus63 kmqt 100207 cca
glfls 
expires:202510100800;;408062

open lake forecast for lake superior...corrected
national weather service marquette mi
1007 pm edt thu oct 9 2025

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

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

.synopsis...

30.5 inch high pressure continues to slide eastward this evening, 
becoming centered over new england later tonight. this allows a 30.0 
inch trough to move into the upper great lakes as a 29.4 inch low 
moves over hudson bay. along this trough, a 29.9 inch low develops 
near thunder bay, then moves over lake superior friday afternoon and 
evening. the low then drops into lower michigan friday night and 
saturday while 30.2 inch ridging builds over lake superior. this 
ridge gradually weakens through the weekend as the next system 
organizes upstream in the northern plains. by early monday, a 
weakening 29.4 inch low pressure moves from manitoba into northern 
ontario, causing a 29.8 to 29.9 inch trough to move over lake 
superior before ridging returns late monday into tuesday, building 
to 30.4 inches by tuesday morning.



lsz264-100800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
1007 pm edt thu oct 9 2025

...gale warning in effect from 8 am edt friday through friday
evening...

.rest of tonight...south winds 15 to 25 knots increasing to 20 to
30 knots after midnight. a chance of showers by midnight, then
showers after midnight. waves 3 to 5 feet occasionally to 7 feet
building to 4 to 7 feet occasionally to 9 feet. 
.friday...west gales to 35 knots veering north late. showers
likely through early afternoon, then a chance of showers by mid
afternoon. waves 4 to 7 feet occasionally to 9 feet. 
.friday night...north winds 20 to 30 knots diminishing to 15 to
25 knots after midnight, then becoming northeast 10 to 20 knots
late. waves subsiding to 2 to 4 feet. 
.saturday...east winds 5 to 15 knots. waves subsiding to calm to
2 feet. 
.saturday night...southeast winds 10 to 20 knots veering south
after midnight. waves building to 2 to 4 feet. 
.sunday...south winds 20 to 30 knots becoming southeast gales to
35 knots by mid afternoon. waves building to 6 to 9 feet
occasionally to 11 feet. 
.sunday night...southeast gales to 35 knots veering south after
midnight. a chance of showers. waves building to 7 to 10 feet
occasionally to 13 feet. 
.monday...south gales to 35 knots becoming west 20 to 30 knots.
showers likely. waves subsiding to 4 to 7 feet occasionally to
9 feet. 
.tuesday...northwest winds 20 to 30 knots becoming north 10 to
20 knots. waves subsiding to 1 to 3 feet. 

$$

fzus63 kmqt 100207 cca
glfls 
expires:202510100800;;408063

open lake forecast for lake superior...corrected
national weather service marquette mi
1007 pm edt thu oct 9 2025

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

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

.synopsis...

30.5 inch high pressure continues to slide eastward this evening, 
becoming centered over new england later tonight. this allows a 30.0 
inch trough to move into the upper great lakes as a 29.4 inch low 
moves over hudson bay. along this trough, a 29.9 inch low develops 
near thunder bay, then moves over lake superior friday afternoon and 
evening. the low then drops into lower michigan friday night and 
saturday while 30.2 inch ridging builds over lake superior. this 
ridge gradually weakens through the weekend as the next system 
organizes upstream in the northern plains. by early monday, a 
weakening 29.4 inch low pressure moves from manitoba into northern 
ontario, causing a 29.8 to 29.9 inch trough to move over lake 
superior before ridging returns late monday into tuesday, building 
to 30.4 inches by tuesday morning.



lsz265-100800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
1007 pm edt thu oct 9 2025

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

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

$$

fzus63 kmqt 100207 cca
glfls 
expires:202510100800;;408064

open lake forecast for lake superior...corrected
national weather service marquette mi
1007 pm edt thu oct 9 2025

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

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

.synopsis...

30.5 inch high pressure continues to slide eastward this evening, 
becoming centered over new england later tonight. this allows a 30.0 
inch trough to move into the upper great lakes as a 29.4 inch low 
moves over hudson bay. along this trough, a 29.9 inch low develops 
near thunder bay, then moves over lake superior friday afternoon and 
evening. the low then drops into lower michigan friday night and 
saturday while 30.2 inch ridging builds over lake superior. this 
ridge gradually weakens through the weekend as the next system 
organizes upstream in the northern plains. by early monday, a 
weakening 29.4 inch low pressure moves from manitoba into northern 
ontario, causing a 29.8 to 29.9 inch trough to move over lake 
superior before ridging returns late monday into tuesday, building 
to 30.4 inches by tuesday morning.



lsz266-100800-
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-
1007 pm edt thu oct 9 2025

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

.rest of tonight...south winds 20 to 30 knots. showers after
midnight. waves 4 to 8 feet occasionally to 10 feet. 
.friday...southwest gales to 35 knots becoming northwest gales to
40 knots late. showers and a slight chance of thunderstorms.
waves subsiding to 4 to 7 feet occasionally to 9 feet. 
.friday night...north gales to 35 knots diminishing to 20 to
30 knots after midnight. a chance of showers through midnight.
waves building to 5 to 8 feet occasionally to 10 feet, then
subsiding to 3 to 6 feet occasionally to 8 feet. 
.saturday...northeast winds 10 to 20 knots becoming east 5 to
15 knots by mid afternoon. waves subsiding to calm to 2 feet. 
.saturday night...southeast winds 5 to 15 knots increasing to
10 to 20 knots after midnight. waves building to 2 to 4 feet. 
.sunday...southeast winds 15 to 25 knots increasing to gales to
35 knots by mid afternoon. waves building to 5 to 8 feet
occasionally to 10 feet. 
.sunday night...southeast gales to 35 knots veering south after
midnight. a chance of showers. waves building to 7 to 10 feet
occasionally to 13 feet. 
.monday...south gales to 35 knots becoming northwest 20 to
30 knots. showers likely. waves subsiding to 4 to 8 feet
occasionally to 10 feet. 
.tuesday...northwest winds 15 to 25 knots veering north. waves
subsiding to 2 to 4 feet. 

$$

fzus63 kmqt 100207 cca
glfls 
expires:202510100800;;408065

open lake forecast for lake superior...corrected
national weather service marquette mi
1007 pm edt thu oct 9 2025

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

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

.synopsis...

30.5 inch high pressure continues to slide eastward this evening, 
becoming centered over new england later tonight. this allows a 30.0 
inch trough to move into the upper great lakes as a 29.4 inch low 
moves over hudson bay. along this trough, a 29.9 inch low develops 
near thunder bay, then moves over lake superior friday afternoon and 
evening. the low then drops into lower michigan friday night and 
saturday while 30.2 inch ridging builds over lake superior. this 
ridge gradually weakens through the weekend as the next system 
organizes upstream in the northern plains. by early monday, a 
weakening 29.4 inch low pressure moves from manitoba into northern 
ontario, causing a 29.8 to 29.9 inch trough to move over lake 
superior before ridging returns late monday into tuesday, building 
to 30.4 inches by tuesday morning.



lsz267-100800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
1007 pm edt thu oct 9 2025

.rest of tonight...south winds 15 to 25 knots increasing to 20 to
30 knots late. a chance of showers after midnight. waves 3 to
6 feet occasionally to 8 feet. 
.friday...south winds to 30 knots with a few gale force gusts to
35 knots possible veering southwest in the afternoon, then
becoming west 20 to 30 knots late. showers. a slight chance of
thunderstorms 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. 
.friday night...north winds 15 to 25 knots veering northeast
after midnight, then increasing to 20 to 30 knots late. a chance
of showers through midnight. waves subsiding to 3 to 5 feet
occasionally to 7 feet. 
.saturday...northeast winds 10 to 20 knots becoming east 5 to
15 knots by mid afternoon. waves subsiding to calm to 2 feet. 
.saturday night...southeast winds 10 to 20 knots increasing to
15 to 25 knots after midnight. waves building to 1 to 3 feet. 
.sunday...southeast winds 15 to 25 knots increasing to 20 to
30 knots by mid afternoon. waves building to 3 to 5 feet
occasionally to 7 feet. 
.sunday night...southeast winds 20 to 30 knots. waves building to
3 to 6 feet occasionally to 8 feet. 
.monday...south winds 15 to 25 knots veering west. showers
likely, then a chance of showers. waves subsiding to 2 to 4 feet,
then building to 4 to 7 feet occasionally to 9 feet. 
.tuesday...northwest winds 15 to 25 knots veering north. waves
building to 5 to 8 feet occasionally to 10 feet, then subsiding
to 2 to 4 feet. 

$$