fzus61 kbuf 192002
glflo 
expires:202509200300;;267678

open lake forecast for lake ontario
national weather service buffalo ny
402 pm edt fri sep 19 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 southeast from eastern 
ontario this evening to new england by saturday night, then off the 
new england coast sunday. broad low pressure averaging 29.8 inches 
will then push across the upper great lakes and into quebec monday 
and tuesday...while pushing a weak cold frontal boundary into the 
lower lakes region. on wednesday, the lake will be sandwiched 
between a 30.3 inch surface high to the north near james bay, and a 
29.9 inch surface low over the lower ohio valley.


loz062-200300-
lake ontario open waters from the niagara river to hamlin beach-
402 pm edt fri sep 19 2025

.tonight...northeast winds 10 knots or less becoming east and
increasing to 15 to 20 knots. waves 1 foot or less building to
2 to 4 feet. 
.saturday...east winds 15 to 25 knots. waves 4 to 7 feet. waves
occasionally around 9 feet. 
.saturday night...east winds 15 to 20 knots. waves 3 to 6 feet. 
.sunday...southeast winds 10 to 15 knots becoming east. waves
2 to 4 feet subsiding to 1 to 3 feet. 
.sunday night...southeast winds 10 to 15 knots becoming south. a
chance of showers and thunderstorms in the evening, then showers
likely with a chance of thunderstorms overnight. waves 1 to
2 feet. 
.monday...southwest winds 5 to 10 knots. showers likely with a
chance of thunderstorms. waves 1 to 2 feet. 
.tuesday...southwest winds 5 to 10 knots becoming north. showers
likely during the day, then a chance of showers tuesday night.
waves 1 foot or less. 
.wednesday...north winds 5 to 15 knots becoming northeast. waves
1 to 2 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 192002
glflo 
expires:202509200300;;267679

open lake forecast for lake ontario
national weather service buffalo ny
402 pm edt fri sep 19 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 southeast from eastern 
ontario this evening to new england by saturday night, then off the 
new england coast sunday. broad low pressure averaging 29.8 inches 
will then push across the upper great lakes and into quebec monday 
and tuesday...while pushing a weak cold frontal boundary into the 
lower lakes region. on wednesday, the lake will be sandwiched 
between a 30.3 inch surface high to the north near james bay, and a 
29.9 inch surface low over the lower ohio valley.


loz063>065-200300-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 pm edt fri sep 19 2025

.tonight...north winds 5 to 15 knots becoming northeast 15 to
20 knots. waves 1 to 3 feet building to 2 to 4 feet. 
.saturday...northeast winds 15 to 20 knots. waves 3 to 6 feet
subsiding to 2 to 4 feet. 
.saturday night...northeast winds 15 to 20 knots becoming
southeast 10 to 15 knots. waves 2 to 4 feet. 
.sunday...southeast winds 10 to 15 knots. waves 1 to 3 feet. 
.sunday night...southeast winds 10 to 15 knots becoming south
15 to 20 knots. a chance of showers overnight. waves 1 to 3 feet
building to 2 to 4 feet. 
.monday...south winds 15 to 20 knots becoming southwest 5 to
15 knots. showers likely with a chance of thunderstorms. waves
2 to 4 feet subsiding to 1 to 3 feet. 
.tuesday...southwest winds 5 to 10 knots becoming north. showers
likely. waves 1 foot or less. 
.wednesday...north winds 5 to 15 knots becoming northeast. a
chance of showers during the day. waves 2 feet or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 191938
glfle 
expires:202509200215;;266507

open lake forecast for lake erie
national weather service cleveland oh
338 pm edt fri sep 19 2025

for waters beyond five nautical miles of shore on lake erie

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

.synopsis...
a ridge averaging 30.10 inches builds into lake erie as high 
pressure center moves from james bay to new england by daybreak 
sunday. a warm front will drift northward across lake erie late
saturday night into sunday morning with pressure falling to 29.90
inches by monday. a cold front moves into the southern great 
lakes late tuesday.



lez164>168-200215-
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-
338 pm edt fri sep 19 2025

.tonight...east winds 10 to 15 knots increasing to 15 to
20 knots. waves 1 to 3 feet building to 3 to 5 feet. 
.saturday...east winds 15 to 25 knots becoming northeast. waves
3 to 5 feet building to 4 to 7 feet. waves occasionally around
9 feet. 
.saturday night...east winds 15 to 25 knots becoming southeast
and diminishing to 10 to 15 knots. waves 5 to 8 feet subsiding to
2 to 4 feet. waves occasionally around 10 feet. 
.sunday...southeast winds 5 to 15 knots becoming south. a chance
of showers in the afternoon. waves 1 to 3 feet. 
.sunday night...south winds 10 to 15 knots becoming southwest
15 to 20 knots. showers with a chance of thunderstorms. waves
1 to 3 feet building to 2 to 4 feet. 
.monday...southwest winds 15 to 20 knots diminishing to 5 to
15 knots. showers likely during the day, then showers likely with
a chance of thunderstorms monday night. waves 2 to 4 feet
subsiding to 2 feet or less. 
.tuesday...southwest winds 5 to 10 knots becoming northeast. a
chance of showers and thunderstorms during the day, then a chance
of showers tuesday night. waves 2 feet or less. 
.wednesday...northeast winds 10 to 15 knots. a chance of showers
during the day. waves 1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 191938
glfle 
expires:202509200215;;266508

open lake forecast for lake erie
national weather service cleveland oh
338 pm edt fri sep 19 2025

for waters beyond five nautical miles of shore on lake erie

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

.synopsis...
a ridge averaging 30.10 inches builds into lake erie as high 
pressure center moves from james bay to new england by daybreak 
sunday. a warm front will drift northward across lake erie late
saturday night into sunday morning with pressure falling to 29.90
inches by monday. a cold front moves into the southern great 
lakes late tuesday.



lez061-169-200215-
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-
338 pm edt fri sep 19 2025

.tonight...northeast winds 10 to 15 knots becoming east 15 to
20 knots. waves 1 to 3 feet building to 2 to 4 feet. 
.saturday...east winds 15 to 25 knots becoming northeast. waves
2 to 4 feet building to 3 to 6 feet. 
.saturday night...northeast winds 15 to 25 knots becoming
southeast and diminishing to 10 to 15 knots. waves 3 to 6 feet
subsiding to 1 to 3 feet. 
.sunday...southeast winds 5 to 15 knots becoming south. a chance
of showers in the afternoon. waves 1 to 3 feet. 
.sunday night...south winds 10 to 15 knots increasing to 15 to
20 knots. a chance of showers and thunderstorms in the evening,
then showers likely with a chance of thunderstorms overnight.
waves 1 to 3 feet building to 2 to 4 feet. 
.monday...southwest winds 15 to 20 knots diminishing to 5 to
15 knots. showers likely during the day, then showers likely with
a chance of thunderstorms monday night. waves 2 to 4 feet
subsiding to 1 to 2 feet. 
.tuesday...southwest winds 5 to 10 knots becoming northeast.
showers likely with a chance of thunderstorms during the day,
then a chance of showers tuesday night. waves around 1 foot. 
.wednesday...northeast winds 5 to 10 knots. a chance of showers
during the day. waves 2 feet or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 191938
glfle 
expires:202509200215;;266506

open lake forecast for lake erie
national weather service cleveland oh
338 pm edt fri sep 19 2025

for waters beyond five nautical miles of shore on lake erie

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

.synopsis...
a ridge averaging 30.10 inches builds into lake erie as high 
pressure center moves from james bay to new england by daybreak 
sunday. a warm front will drift northward across lake erie late
saturday night into sunday morning with pressure falling to 29.90
inches by monday. a cold front moves into the southern great 
lakes late tuesday.



lez162-163-200215-
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-
338 pm edt fri sep 19 2025

.tonight...east winds 10 to 15 knots increasing to 15 to
20 knots. waves 1 to 3 feet building to 2 to 4 feet. 
.saturday...east winds 15 to 20 knots. waves 2 to 4 feet building
to 3 to 6 feet. 
.saturday night...east winds 15 to 20 knots becoming southeast
and diminishing to around 10 knots. waves 3 to 6 feet subsiding
to 1 to 3 feet. 
.sunday...south winds around 10 knots. showers likely with a
chance of thunderstorms in the afternoon. waves 1 to 3 feet
subsiding to 1 foot or less. 
.sunday night...south winds 10 to 15 knots becoming southwest.
showers with a chance of thunderstorms. waves 2 feet or less. 
.monday...southwest winds 5 to 15 knots. showers likely during
the day, then showers likely with a chance of thunderstorms
monday night. waves 2 feet or less. 
.tuesday...southwest winds 5 to 10 knots becoming north. a chance
of showers and thunderstorms during the day, then a chance of
showers tuesday night. waves 1 foot or less. 
.wednesday...northeast winds 10 to 15 knots. a chance of showers
during the day. waves 1 to 2 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 191943
glfsc 
expires:202509200400;;266763

lake st clair forecast
national weather service detroit/pontiac mi
343 pm edt fri sep 19 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 tracks from northern ontario into the
eastern great lakes tonight through saturday before passing over
new england sunday morning. meanwhile, a weakening low pressure
system tracks northward across the upper midwest. this sustains an
easterly pressure gradient over the central lakes early this 
weekend. a warm front then tracks through on sunday bringing a 
chance of showers and storms.


lcz460-200400-
lake st clair-
343 pm edt fri sep 19 2025

.tonight...northeast winds 10 to 15 knots. mostly clear. waves 1 to
3 feet.
.saturday...east winds 10 to 15 knots. partly sunny. waves 1 to 3
feet.
.saturday night...east winds 15 to 20 knots. partly cloudy. waves 1
to 3 feet.
.sunday...south winds 10 to 15 knots. partly sunny. showers likely
and a chance of thunderstorms early in the afternoon. waves 2 feet
or less.
.sunday night...southwest winds 10 to 15 knots. showers and a chance
of thunderstorms until early morning...then a chance of light
showers after midnight. waves 2 feet or less.
.monday...southwest winds 10 to 15 knots diminishing to 5 to 10
knots in the afternoon and evening. partly sunny becoming mostly
cloudy. a chance of light showers. showers likely and a chance of
thunderstorms in the evening. waves 2 feet or less.
.tuesday...north winds 5 to 10 knots. partly cloudy. showers likely
and a chance of thunderstorms. waves 2 feet or less.
.wednesday...northeast winds 10 to 15 knots. partly cloudy. a chance
of showers. waves 2 feet or less.

$$

fzus63 kdtx 191943
glflh 
expires:202509200400;;266758

open lake forecast for lake huron
national weather service detroit/pontiac mi
343 pm edt fri sep 19 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 tracks from northern ontario into the
eastern great lakes tonight through saturday before passing over
new england sunday morning. meanwhile, a weakening low pressure
system tracks northward across the upper midwest. this sustains a
easterly pressure gradient over the central lakes early this
weekend. a warm front then tracks through on sunday bringing a
chance of showers and storms.


lhz361-200400-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
343 pm edt fri sep 19 2025

.tonight...east winds 5 to 10 knots increasing to 15 to 20 knots.
waves 1 to 3 feet building to 4 to 6 feet. waves occasionally
around 8 feet. 
.saturday...east winds 15 to 20 knots. waves 6 to 9 feet. waves
occasionally around 12 feet. 
.saturday night...east winds 15 to 20 knots becoming southeast
10 to 15 knots after midnight. a chance of showers after
midnight. waves 5 to 7 feet. waves occasionally around 10 feet. 
.sunday...southeast winds 10 to 15 knots. showers likely. waves
3 to 5 feet. 
.sunday night...southeast winds 5 to 10 knots until early morning
becoming light and variable. showers likely. waves 2 to 4 feet
subsiding to 1 to 3 feet in the late evening and overnight. 
.monday...light and variable winds. a chance of showers. waves
2 feet or less. 
.tuesday...light and variable winds becoming north 5 to 10 knots
in the late evening and early morning. waves 2 feet or less. 
.wednesday...north winds 5 to 10 knots. waves 2 feet or less. 


$$

fzus63 kdtx 191943
glflh 
expires:202509200400;;266759

open lake forecast for lake huron
national weather service detroit/pontiac mi
343 pm edt fri sep 19 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 tracks from northern ontario into the
eastern great lakes tonight through saturday before passing over
new england sunday morning. meanwhile, a weakening low pressure
system tracks northward across the upper midwest. this sustains a
easterly pressure gradient over the central lakes early this
weekend. a warm front then tracks through on sunday bringing a
chance of showers and storms.


lhz362-363-200400-
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-
343 pm edt fri sep 19 2025

.tonight...northeast winds 10 to 15 knots becoming east 15 to
20 knots after midnight. waves 3 to 5 feet building to 4 to
6 feet early in the morning. waves occasionally around 8 feet. 
.saturday...east winds 15 to 20 knots decreasing to 10 to
15 knots in the afternoon. waves 5 to 7 feet. waves occasionally
around 10 feet. 
.saturday night...east winds 10 to 15 knots increasing to 15 to
20 knots in the late evening and early morning...then becoming
southeast 10 to 15 knots after midnight. a chance of showers
after midnight. waves 4 to 6 feet. 
.sunday...southeast winds 10 to 15 knots. a chance of showers in
the morning...then showers likely and a chance of thunderstorms
in the afternoon. waves 3 to 5 feet. waves occasionally around
8 feet. 
.sunday night...southeast winds 5 to 10 knots becoming south
10 to 15 knots in the late evening and early morning...then
decreasing to 5 to 10 knots after midnight. showers likely and a
chance of thunderstorms in the evening...then a chance of showers
after midnight. waves 2 to 4 feet subsiding to 1 to 3 feet in the
late evening and overnight. 
.monday...southwest winds 5 to 10 knots becoming light and
variable. a chance of showers. waves 1 to 3 feet. 
.tuesday...north winds 5 to 10 knots. waves 2 feet or less. 
.wednesday...north winds 10 to 15 knots decreasing to 5 to
10 knots until early morning. waves 1 to 3 feet. 


$$

fzus63 kdtx 191943
glflh 
expires:202509200400;;266760

open lake forecast for lake huron
national weather service detroit/pontiac mi
343 pm edt fri sep 19 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 tracks from northern ontario into the
eastern great lakes tonight through saturday before passing over
new england sunday morning. meanwhile, a weakening low pressure
system tracks northward across the upper midwest. this sustains a
easterly pressure gradient over the central lakes early this
weekend. a warm front then tracks through on sunday bringing a
chance of showers and storms.


lhz462>464-200400-
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-
343 pm edt fri sep 19 2025

.tonight...north winds 10 to 15 knots becoming northeast 15 to
20 knots late in the evening...then becoming east 10 to 15 knots
after midnight. waves 3 to 5 feet. 
.saturday...east winds 10 to 15 knots decreasing to 5 to 10 knots
late in the afternoon. waves 3 to 5 feet. 
.saturday night...east winds 10 to 15 knots becoming southeast
15 to 20 knots in the late evening and overnight. waves 3 to
5 feet. 
.sunday...southeast winds 10 to 15 knots. a chance of showers in
the morning...then showers likely and a chance of thunderstorms
in the afternoon. waves 2 to 4 feet. 
.sunday night...south winds 10 to 15 knots. showers likely and a
chance of thunderstorms in the evening...then a chance of showers
after midnight. waves 1 to 3 feet. 
.monday...southwest winds 5 to 10 knots backing to the south late
in the afternoon. a chance of showers. waves 2 feet or less. 
.tuesday...south winds 5 to 10 knots. a chance of showers. waves
2 feet or less. 
.wednesday...north winds 10 to 15 knots. waves 1 to 3 feet. 


$$

fzus63 kmkx 192001
glflm 
expires:202509200330;;267569

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
301 pm cdt fri sep 19 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...

east to northeast winds gradually build today, reaching 15 to 
20 kt speeds over northern portions of the lake as high pressure
of 30.3 inches drifts southeastward across ontario canada. high
pressure deepens to 30.4 inches tonight, working with weak 
surface low pressure over the northern great plains to veer 
winds east to southeast, with the fastest speeds tonight (around
25 kts) over the southern half of the lake. southeast winds 
gradually subside throughout saturday, remaining a bit breezy 
over the northern tip of the lake. slower winds will veer due 
south into sunday.

intermittent rounds of showers and thunderstorms are expected
tonight through monday night. 


lmz080-669-671-673-675-777-779-870-872-874-876-878-200330-
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-
301 pm cdt fri sep 19 2025

sheboygan wi to pentwater mi south...

.tonight...northeast winds 10 to 20 kt becoming east to 30 kt,
then becoming southeast 15 to 25 kt late. slight chance of
showers and thunderstorms this evening, then chance of showers
and slight chance of thunderstorms overnight. waves 1 to 3 ft
building to 4 to 7 ft occasionally to 9 ft. 
.saturday...southeast winds 15 to 25 kt diminishing to 10 to
15 kt. chance of showers and slight chance of thunderstorms in
the morning, then chance of showers and thunderstorms in the
afternoon. waves 4 to 7 ft occasionally to 9 ft subsiding to 2 to
4 ft. 
.saturday night...southeast winds 10 to 15 kt becoming south.
showers likely with a chance of thunderstorms in the evening,
then showers likely overnight. waves 1 to 3 ft. 
.sunday...south winds 10 to 15 kt increasing to 10 to 20 kt.
showers likely in the morning, then chance of showers in the
afternoon. waves 1 to 3 ft. 
.sunday night...southwest winds 10 to 15 kt. chance of showers.
waves 1 to 3 ft. 
.monday...southwest winds 10 to 15 kt becoming south. chance of
showers in the morning, then chance of showers and thunderstorms
in the afternoon. waves 1 to 2 ft. 
.monday night...south winds 5 to 10 kt veering to north. chance
of showers. waves 1 to 2 ft. 
.tuesday...north winds 5 to 10 kt increasing to 10 to 20 kt.
chance of showers. waves 1 to 2 ft. 
.wednesday...northeast winds 10 to 20 kt. waves 2 to 4 ft.  

$$

fzus63 kmkx 192001
glflm 
expires:202509200330;;267568

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
301 pm cdt fri sep 19 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...

east to northeast winds gradually build today, reaching 15 to 
20 kt speeds over northern portions of the lake as high pressure
of 30.3 inches drifts southeastward across ontario canada. high
pressure deepens to 30.4 inches tonight, working with weak 
surface low pressure over the northern great plains to veer 
winds east to southeast, with the fastest speeds tonight (around
25 kts) over the southern half of the lake. southeast winds 
gradually subside throughout saturday, remaining a bit breezy 
over the northern tip of the lake. slower winds will veer due 
south into sunday.

intermittent rounds of showers and thunderstorms are expected
tonight through monday night. 


lmz261-362-364-366-563-565-567-868-200330-
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-
301 pm cdt fri sep 19 2025

sheboygan wi to pentwater mi north...

.tonight...northeast winds 15 to 25 kt becoming southeast. slight
chance of showers and thunderstorms this evening, then chance of
showers and thunderstorms overnight. waves 4 to 6 ft occasionally
to 8 ft. 
.saturday...southeast winds 15 to 25 kt becoming east. chance of
showers and slight chance of thunderstorms. waves 4 to 6 ft
occasionally to 8 ft subsiding to 3 to 5 ft. 
.saturday night...southeast winds 15 to 25 kt diminishing to
10 to 20 kt. showers with a chance of thunderstorms in the
evening, then showers likely with a chance of thunderstorms
overnight. waves 3 to 5 ft subsiding to 2 to 4 ft. 
.sunday...south winds 10 to 20 kt. showers likely in the morning,
then chance of showers in the afternoon. waves 1 to 3 ft. 
.sunday night...south winds 10 to 15 kt becoming southwest 5 to
10 kt. chance of showers. waves 1 to 3 ft. 
.monday...southwest winds 10 to 15 kt. chance of showers in the
afternoon. waves 1 to 2 ft. 
.monday night...south winds 5 to 10 kt backing to northeast.
waves 1 to 2 ft. 
.tuesday...north winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 2 ft. 
.wednesday...northeast winds 10 to 15 kt increasing to 10 to
20 kt. waves 1 to 3 ft.  

$$

fzus63 kmqt 192001
glfls 
expires:202509200800;;267586

open lake forecast for lake superior
national weather service marquette mi
401 pm edt fri sep 19 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...

30.3 inch high pressure is centered near james bay this afternoon, 
and will continue sliding eastward into quebec tonight while 
strengthening to 30.4 inches. the 30.4 inch high will move to new 
england by sunday morning. this keeps 30.2 inch ridging over lake 
superior through early saturday, which weakens to 30.0 inches by 
saturday night. troughing then spreads over lake superior sunday 
into the beginning of next week as low pressure deepens over the 
canadian prairie to around 29.5 inches. high pressure then builds in 
from the north on tuesday, reaching 30.2 inches by wednesday.



lsz162-200800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt fri sep 19 2025 /301 pm cdt fri sep 19 2025/

.late this afternoon...east winds 20 to 30 knots. a slight chance
of showers. waves 5 to 8 feet occasionally to 10 feet. 
.tonight...east winds 20 to 30 knots diminishing to 15 to
25 knots late. a chance of showers and a slight chance of
thunderstorms. waves subsiding to 3 to 5 feet occasionally to
7 feet. 
.saturday...east winds 10 to 20 knots. a chance of showers and a
slight chance of thunderstorms. waves subsiding to 1 to 3 feet. 
.saturday night...east winds 5 to 15 knots veering southeast
after midnight. a slight chance of thunderstorms through
midnight. a chance of showers. waves subsiding to calm to 2 feet.
.sunday...south winds 5 to 15 knots backing southeast by mid
afternoon. a chance of showers. a slight chance of thunderstorms
by mid afternoon. waves calm to 2 feet. 
.sunday night...east winds 5 to 15 knots backing north after
midnight. waves calm to 2 feet. 
.monday...north winds 5 to 15 knots veering northeast by mid
afternoon. waves calm to 2 feet. 
.monday night...northeast winds 5 to 15 knots. waves calm to
2 feet. 
.tuesday...northeast winds 5 to 15 knots. waves calm to 2 feet. 
.wednesday...northeast winds 5 to 15 knots. waves calm to 2 feet.

$$

fzus63 kmqt 192001
glfls 
expires:202509200800;;267587

open lake forecast for lake superior
national weather service marquette mi
401 pm edt fri sep 19 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...

30.3 inch high pressure is centered near james bay this afternoon, 
and will continue sliding eastward into quebec tonight while 
strengthening to 30.4 inches. the 30.4 inch high will move to new 
england by sunday morning. this keeps 30.2 inch ridging over lake 
superior through early saturday, which weakens to 30.0 inches by 
saturday night. troughing then spreads over lake superior sunday 
into the beginning of next week as low pressure deepens over the 
canadian prairie to around 29.5 inches. high pressure then builds in 
from the north on tuesday, reaching 30.2 inches by wednesday.



lsz263-200800-
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 fri sep 19 2025

.late this afternoon...east winds 15 to 25 knots. a slight chance
of showers. waves 3 to 6 feet occasionally to 8 feet building to
4 to 7 feet occasionally to 9 feet. 
.tonight...east winds 20 to 30 knots diminishing to 10 to
20 knots. a chance of showers and a slight chance of
thunderstorms. waves subsiding to 2 to 4 feet, then building to
3 to 5 feet occasionally to 7 feet. 
.saturday...southeast winds 10 to 20 knots becoming east 15 to
25 knots in the afternoon, then diminishing to 10 to 20 knots
late. a chance of showers and a slight chance of thunderstorms.
waves building to 3 to 6 feet occasionally to 8 feet. 
.saturday night...southeast winds 10 to 20 knots diminishing to
5 to 15 knots after midnight, then veering south late. a chance
of showers and a slight chance of thunderstorms. waves subsiding
to 2 to 4 feet. 
.sunday...south winds 5 to 15 knots becoming east less than
10 knots by mid afternoon. a chance of showers. a slight chance
of thunderstorms by mid afternoon. waves subsiding to calm to
2 feet. 
.sunday night...east winds less than 10 knots backing northeast
after midnight. waves calm to 2 feet. 
.monday...north winds less than 10 knots veering northeast by mid
afternoon. waves calm to 2 feet. 
.monday night...northeast winds less than 10 knots. waves calm to
2 feet. 
.tuesday...northeast winds 5 to 15 knots. waves calm to 2 feet. 
.wednesday...northeast winds 5 to 15 knots veering east. waves
calm to 2 feet. 

$$

fzus63 kmqt 192001
glfls 
expires:202509200800;;267588

open lake forecast for lake superior
national weather service marquette mi
401 pm edt fri sep 19 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...

30.3 inch high pressure is centered near james bay this afternoon, 
and will continue sliding eastward into quebec tonight while 
strengthening to 30.4 inches. the 30.4 inch high will move to new 
england by sunday morning. this keeps 30.2 inch ridging over lake 
superior through early saturday, which weakens to 30.0 inches by 
saturday night. troughing then spreads over lake superior sunday 
into the beginning of next week as low pressure deepens over the 
canadian prairie to around 29.5 inches. high pressure then builds in 
from the north on tuesday, reaching 30.2 inches by wednesday.



lsz264-200800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
401 pm edt fri sep 19 2025

.late this afternoon...east winds 15 to 25 knots. waves 2 to
4 feet building to 3 to 5 feet occasionally to 7 feet. 
.tonight...east winds 15 to 25 knots diminishing to 10 to
20 knots after midnight, then becoming southeast 15 to 25 knots
late. a slight chance of showers after midnight. waves subsiding
to 2 to 4 feet, then building to 3 to 5 feet occasionally to
7 feet. 
.saturday...southeast winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon, then diminishing to 15 to 25 knots
late. a chance of showers and a slight chance of thunderstorms.
waves building to 3 to 6 feet occasionally to 8 feet. 
.saturday night...southeast winds 10 to 20 knots. a chance of
showers and a slight chance of thunderstorms. waves subsiding to
2 to 4 feet. 
.sunday...south winds 5 to 15 knots backing southeast by mid
afternoon. a chance of showers. waves subsiding to 1 to 3 feet. 
.sunday night...east winds less than 10 knots backing northeast
after midnight. waves subsiding to calm to 2 feet. 
.monday...northeast winds less than 10 knots backing north by mid
afternoon. waves calm to 2 feet. 
.monday night...north winds less than 10 knots. waves calm to
2 feet. 
.tuesday...northeast winds 5 to 15 knots diminishing to less than
10 knots. waves calm to 2 feet. 
.wednesday...northeast winds 5 to 15 knots veering south. waves
calm to 2 feet. 

$$

fzus63 kmqt 192001
glfls 
expires:202509200800;;267589

open lake forecast for lake superior
national weather service marquette mi
401 pm edt fri sep 19 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...

30.3 inch high pressure is centered near james bay this afternoon, 
and will continue sliding eastward into quebec tonight while 
strengthening to 30.4 inches. the 30.4 inch high will move to new 
england by sunday morning. this keeps 30.2 inch ridging over lake 
superior through early saturday, which weakens to 30.0 inches by 
saturday night. troughing then spreads over lake superior sunday 
into the beginning of next week as low pressure deepens over the 
canadian prairie to around 29.5 inches. high pressure then builds in 
from the north on tuesday, reaching 30.2 inches by wednesday.



lsz265-200800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
401 pm edt fri sep 19 2025

.late this afternoon...east winds 15 to 25 knots. waves 2 to
4 feet. 
.tonight...east winds 15 to 25 knots veering southeast after
midnight. a slight chance of showers after midnight. waves 2 to
4 feet. 
.saturday...southeast winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon, then diminishing to 15 to 25 knots
late. a slight chance of showers and thunderstorms. waves
building to 3 to 5 feet occasionally to 7 feet, then subsiding to
2 to 4 feet. 
.saturday night...southeast winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. a slight chance of thunderstorms
through midnight. a chance of showers. waves subsiding to 1 to
3 feet. 
.sunday...southeast winds 10 to 20 knots. a chance of showers. a
slight chance of thunderstorms by mid afternoon. waves subsiding
to calm to 2 feet. 
.sunday night...southeast winds 5 to 15 knots veering west after
midnight. a chance of showers. waves calm to 2 feet. 
.monday...northwest winds 5 to 15 knots veering north by mid
afternoon. waves calm to 2 feet. 
.monday night...northeast winds 5 to 15 knots backing north after
midnight. waves calm to 2 feet. 
.tuesday...north winds 5 to 15 knots. waves calm to 2 feet. 
.wednesday...northeast winds 5 to 15 knots veering east. waves
calm to 2 feet. 

$$

fzus63 kmqt 192001
glfls 
expires:202509200800;;267590

open lake forecast for lake superior
national weather service marquette mi
401 pm edt fri sep 19 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...

30.3 inch high pressure is centered near james bay this afternoon, 
and will continue sliding eastward into quebec tonight while 
strengthening to 30.4 inches. the 30.4 inch high will move to new 
england by sunday morning. this keeps 30.2 inch ridging over lake 
superior through early saturday, which weakens to 30.0 inches by 
saturday night. troughing then spreads over lake superior sunday 
into the beginning of next week as low pressure deepens over the 
canadian prairie to around 29.5 inches. high pressure then builds in 
from the north on tuesday, reaching 30.2 inches by wednesday.



lsz266-200800-
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 fri sep 19 2025

.late this afternoon...east winds 15 to 25 knots. waves 2 to
4 feet. 
.tonight...east winds 15 to 25 knots becoming southeast 10 to
20 knots after midnight, then increasing to 15 to 25 knots late.
waves building to 3 to 5 feet occasionally to 7 feet. 
.saturday...southeast winds 15 to 25 knots. a slight chance of
showers and thunderstorms. waves building to 3 to 6 feet
occasionally to 8 feet. 
.saturday night...southeast winds 15 to 25 knots diminishing to
10 to 20 knots late. a chance of showers through midnight. a
slight chance of thunderstorms. showers likely after midnight.
waves subsiding to 2 to 4 feet. 
.sunday...southeast winds 10 to 20 knots diminishing to 5 to
15 knots by mid afternoon. showers likely through early
afternoon. a slight chance of thunderstorms. a chance of showers
by mid afternoon. waves subsiding to 1 to 3 feet. 
.sunday night...southeast winds 5 to 15 knots veering south after
midnight. a chance of showers. waves subsiding to calm to 2 feet.
.monday...north winds 5 to 15 knots. a chance of showers. waves
calm to 2 feet. 
.monday night...north winds 5 to 15 knots. waves calm to 2 feet. 
.tuesday...north winds 5 to 15 knots veering northeast. waves
calm to 2 feet. 
.wednesday...northeast winds 5 to 15 knots backing north. waves
calm to 2 feet. 

$$

fzus63 kmqt 192001
glfls 
expires:202509200800;;267591

open lake forecast for lake superior
national weather service marquette mi
401 pm edt fri sep 19 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...

30.3 inch high pressure is centered near james bay this afternoon, 
and will continue sliding eastward into quebec tonight while 
strengthening to 30.4 inches. the 30.4 inch high will move to new 
england by sunday morning. this keeps 30.2 inch ridging over lake 
superior through early saturday, which weakens to 30.0 inches by 
saturday night. troughing then spreads over lake superior sunday 
into the beginning of next week as low pressure deepens over the 
canadian prairie to around 29.5 inches. high pressure then builds in 
from the north on tuesday, reaching 30.2 inches by wednesday.



lsz267-200800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
401 pm edt fri sep 19 2025

.late this afternoon...northeast winds 10 to 20 knots. waves calm
to 2 feet. 
.tonight...east winds 10 to 20 knots becoming southeast 15 to
25 knots after midnight. waves building to 2 to 4 feet. 
.saturday...southeast winds 15 to 25 knots. a slight chance of
showers. waves building to 3 to 5 feet occasionally to 7 feet. 
.saturday night...southeast winds 20 to 30 knots diminishing to
15 to 25 knots after midnight. a chance of showers through
midnight. a slight chance of thunderstorms. showers likely after
midnight. waves subsiding to 2 to 4 feet. 
.sunday...southeast winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. showers and a slight chance of
thunderstorms. waves subsiding to calm to 2 feet. 
.sunday night...southeast winds 10 to 20 knots becoming south
5 to 15 knots after midnight. showers likely through midnight. a
chance of showers after midnight. waves calm to 2 feet. 
.monday...southwest winds 5 to 15 knots veering northwest by mid
afternoon. a chance of showers. waves calm to 2 feet. 
.monday night...north winds 5 to 15 knots. waves calm to 2 feet. 
.tuesday...north winds 10 to 20 knots veering northeast. waves
calm to 2 feet. 
.wednesday...north winds 10 to 20 knots. waves calm to 2 feet. 

$$