fzus61 kbuf 090820
glflo 
expires:202609091500;;155857

open lake forecast for lake ontario
national weather service buffalo ny
420 am edt wed sep 9 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 30.2 inch ridge of high pressure over the east coast 
will move further east today. a cold front will cross the lake while 
averaging 29.8 inches tonight. behind the cold front, another ridge 
averaging 30.0 inches should build from the western great lakes 
through friday and then exit toward new england on saturday. a warm 
front should sweep northeastward across lake ontario saturday night 
and be followed by a cold front sweeping eastward across the lake 
later on sunday.


loz062-091500-
lake ontario open waters from the niagara river to hamlin beach-
420 am edt wed sep 9 2026

.today...south winds 5 to 15 knots becoming southwest 15 to
20 knots. a chance of showers early, then showers. showers with a
chance of thunderstorms late. waves 1 to 3 feet building to 2 to
4 feet. 
.tonight...southwest winds 15 to 20 knots becoming west. showers
likely with a chance of thunderstorms early, then a chance of
showers late in the evening. waves 3 to 5 feet subsiding to 2 to
4 feet. 
.thursday...west winds 15 to 20 knots. waves 2 to 4 feet. 
.thursday night...northwest winds 15 to 20 knots diminishing to
10 to 15 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.friday...northwest winds 10 knots or less becoming south. waves
2 feet or less. 
.saturday...south winds 10 knots or less becoming southwest. a
chance of showers saturday night. waves 1 foot or less. 
.sunday...west winds 5 to 10 knots becoming northwest. a chance
of showers during the day. waves 1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 090820
glflo 
expires:202609091500;;155858

open lake forecast for lake ontario
national weather service buffalo ny
420 am edt wed sep 9 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 30.2 inch ridge of high pressure over the east coast 
will move further east today. a cold front will cross the lake while 
averaging 29.8 inches tonight. behind the cold front, another ridge 
averaging 30.0 inches should build from the western great lakes 
through friday and then exit toward new england on saturday. a warm 
front should sweep northeastward across lake ontario saturday night 
and be followed by a cold front sweeping eastward across the lake 
later on sunday.


loz063>065-091500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
420 am edt wed sep 9 2026

.today...south winds 15 to 20 knots. showers likely this morning,
then showers with a chance of thunderstorms this afternoon. waves
1 to 3 feet building to 2 to 4 feet. 
.tonight...southwest winds 15 to 25 knots becoming west. showers
with a chance of thunderstorms in the evening, then a chance of
showers after midnight. waves 2 to 4 feet building to 3 to
5 feet. 
.thursday...west winds 15 to 20 knots. waves 3 to 6 feet. 
.thursday night...northwest winds 15 to 20 knots diminishing to
10 to 15 knots. waves 3 to 6 feet subsiding to 2 to 4 feet. 
.friday...northwest winds 5 to 10 knots becoming south. waves
2 feet or less. 
.saturday...south winds 5 to 15 knots increasing to 15 to
20 knots. a chance of showers saturday night. waves 1 to 3 feet. 
.sunday...southwest winds 5 to 15 knots becoming northwest. a
chance of showers. waves 1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 090749
glfle 
expires:202609091415;;154075

open lake forecast for lake erie
national weather service cleveland oh
349 am edt wed sep 9 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...
pressure will fall, and a trough averaging 29.90 inches moves 
across lake erie today followed by a cold front late tonight into
thursday. high pressure 30.10 inches builds back in for late thursday
into friday, weakening to 30.00 inches for saturday. 



lez164>167-091415-
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-
349 am edt wed sep 9 2026

.today...southwest winds 15 to 20 knots. a slight chance of
showers late this morning. a chance of showers with a slight
chance of thunderstorms early this afternoon, then showers with a
chance of thunderstorms late. waves 2 to 4 feet. 
.tonight...west winds 15 to 20 knots diminishing to 10 to
15 knots. showers with a chance of thunderstorms early, then a
slight chance of showers and thunderstorms late in the evening.
waves 3 to 5 feet subsiding to 1 to 3 feet. 
.thursday...northwest winds 5 to 10 knots. waves 1 to 2 feet. 
.thursday night...northwest winds 5 to 10 knots becoming
northeast. waves 1 to 2 feet. 
.friday...east winds 10 knots or less becoming southeast. waves
2 feet or less. 
.saturday...south winds 5 to 10 knots becoming southwest. a
chance of showers saturday night. waves 1 to 3 feet. 
.sunday...southwest winds 5 to 15 knots becoming east. waves 1 to
3 feet building to 2 to 4 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 090749
glfle 
expires:202609091415;;154076

open lake forecast for lake erie
national weather service cleveland oh
349 am edt wed sep 9 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...
pressure will fall, and a trough averaging 29.90 inches moves 
across lake erie today followed by a cold front late tonight into
thursday. high pressure 30.10 inches builds back in for late thursday
into friday, weakening to 30.00 inches for saturday. 



lez061-168-169-091415-
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-
349 am edt wed sep 9 2026

.today...southwest winds 10 to 15 knots. a chance of showers this
morning, then showers with a chance of thunderstorms this
afternoon. waves 1 to 3 feet building to 2 to 4 feet. 
.tonight...southwest winds 15 to 20 knots becoming west 10 to
15 knots. showers with a chance of thunderstorms early, then a
chance of showers and thunderstorms late in the evening. waves
3 to 5 feet. 
.thursday...northwest winds 5 to 10 knots becoming west. waves
1 to 3 feet. 
.thursday night...northwest winds 5 to 15 knots becoming north.
waves 2 feet or less. 
.friday...north winds 10 knots or less becoming southeast. waves
1 foot or less. 
.saturday...south winds 5 to 10 knots. a chance of showers
saturday night. waves 1 foot or less building to 1 to 3 feet. 
.sunday...southwest winds 5 to 10 knots becoming northeast. waves
1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 090749
glfle 
expires:202609091415;;154074

open lake forecast for lake erie
national weather service cleveland oh
349 am edt wed sep 9 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...
pressure will fall, and a trough averaging 29.90 inches moves 
across lake erie today followed by a cold front late tonight into
thursday. high pressure 30.10 inches builds back in for late thursday
into friday, weakening to 30.00 inches for saturday. 



lez162-163-091415-
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-
349 am edt wed sep 9 2026

.today...southwest winds 10 to 15 knots becoming west. a chance
of showers and thunderstorms early this afternoon. showers likely
with a chance of thunderstorms late. waves 1 to 3 feet. 
.tonight...west winds 10 to 15 knots. a chance of showers and
thunderstorms early. waves 2 feet or less. 
.thursday...northwest winds 5 to 10 knots. waves 1 foot or less. 
.thursday night...northwest winds 5 to 10 knots becoming north.
waves 1 foot or less. 
.friday...northeast winds 10 knots or less becoming southeast.
waves 1 foot or less. 
.saturday...south winds 5 to 10 knots becoming southwest. waves
1 foot or less. 
.sunday...west winds 10 knots or less becoming southeast. waves
1 foot or less building to 1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 090723
glfsc 
expires:202609091530;;153387

lake st clair forecast
national weather service detroit/pontiac mi
323 am edt wed sep 9 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, 29.30 inches, will track across northern
ontario today, driving a slow moving cold front across the great
lakes region. this system will provide showers and few
thunderstorms to the lakes. high pressure will expand into the
region from the west thursday into friday.


lcz460-091530-
lake st clair-
323 am edt wed sep 9 2026

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

$$

fzus63 kdtx 090722
glflh 
expires:202609091530;;153193

open lake forecast for lake huron
national weather service detroit/pontiac mi
322 am edt wed sep 9 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, 29.30 inches, will track across northern
ontario today, driving a slow moving cold front across the great
lakes region. this system will provide showers and few
thunderstorms to the lakes. high pressure will expand into the
region from the west thursday into friday.


lhz462>464-091530-
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-
322 am edt wed sep 9 2026

.today...south winds 10 to 15 knots becoming southwest 15 to
20 knots with gusts to around 30 knots in the afternoon. showers
in the morning...then a chance of showers in the afternoon. waves
1 to 3 feet building to 2 to 4 feet in the afternoon. 
.tonight...southwest winds 15 to 20 knots becoming west 10 to
15 knots in the late evening and overnight. waves 2 to 4 feet
subsiding to 1 to 3 feet after midnight. 
.thursday...northwest winds 5 to 10 knots. waves 1 to 3 feet. 
.thursday night...north winds 5 to 10 knots. waves 1 to 3 feet. 
.friday...west winds 5 to 10 knots in the morning becoming light
and variable...then becoming southeast 5 to 10 knots late in the
afternoon becoming south 10 to 15 knots. waves 1 to 3 feet. 
.saturday...south winds 10 to 15 knots becoming southwest 5 to
10 knots by midnight. waves 2 to 4 feet. 
.sunday...west winds 5 to 10 knots veering to the northeast by
midnight. a chance of. waves 1 to 3 feet building to 2 to 4 feet
by midnight. 


$$

fzus63 kdtx 090722
glflh 
expires:202609091530;;153192

open lake forecast for lake huron
national weather service detroit/pontiac mi
322 am edt wed sep 9 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, 29.30 inches, will track across northern
ontario today, driving a slow moving cold front across the great
lakes region. this system will provide showers and few
thunderstorms to the lakes. high pressure will expand into the
region from the west thursday into friday.


lhz362-363-091530-
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-
322 am edt wed sep 9 2026

.today...southwest winds 15 to 20 knots with gusts to around
30 knots decreasing to 10 to 15 knots with gusts to around
30 knots late in the afternoon. showers likely in the morning...
then a chance of showers in the afternoon. waves 3 to 5 feet. 
.tonight...west winds 10 to 15 knots veering to the northwest
after midnight. a chance of waterspouts in the evening. waves
3 to 5 feet. 
.thursday...northwest winds 10 to 15 knots. waves 2 to 4 feet. 
.thursday night...northwest winds 10 to 15 knots decreasing to
northwest after midnight. waves 2 to 4 feet subsiding to 1 to
3 feet after midnight. 
.friday...light and variable winds becoming southwest 5 to
10 knots late in the morning...then becoming south 10 to 15 knots
late in the afternoon. waves 2 feet or less building to 2 to
4 feet late in the afternoon. 
.saturday...south winds 10 to 15 knots increasing to 15 to
20 knots in the late morning and early afternoon...then
decreasing to 10 to 15 knots early in the evening becoming west
5 to 10 knots by midnight. a chance of showers early in the
evening. waves 3 to 5 feet. 
.sunday...northwest winds 5 to 10 knots. a chance of showers by
midnight. waves 1 to 3 feet building to 3 to 5 feet . 


$$

fzus63 kdtx 090722
glflh 
expires:202609091530;;153191

open lake forecast for lake huron
national weather service detroit/pontiac mi
322 am edt wed sep 9 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, 29.30 inches, will track across northern
ontario today, driving a slow moving cold front across the great
lakes region. this system will provide showers and few
thunderstorms to the lakes. high pressure will expand into the
region from the west thursday into friday.


lhz361-091530-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
322 am edt wed sep 9 2026

.today...southwest winds 10 to 15 knots veering to the west early
in the afternoon...then increasing to 15 to 20 knots late in the
afternoon. a chance of showers in the morning. waves 2 to 4 feet
building to 3 to 5 feet late in the afternoon. 
.tonight...west winds 10 to 15 knots becoming northwest 15 to
20 knots with gusts to around 30 knots after midnight. waves 2 to
4 feet. 
.thursday...northwest winds 10 to 15 knots. waves 2 to 4 feet. 
.thursday night...northwest winds 10 to 15 knots becoming light
and variable. waves 1 to 3 feet. 
.friday...south winds 5 to 10 knots backing to the southeast late
in the afternoon...then becoming south 10 to 15 knots late in the
evening. waves 2 feet or less building to 2 to 4 feet late in the
afternoon. 
.saturday...south winds 10 to 15 knots becoming southwest 5 to
10 knots early in the evening...then veering to the northwest by
midnight. a chance of showers until early evening. waves 2 to
4 feet subsiding to 1 to 3 feet by midnight. 
.sunday...west winds 5 to 10 knots. a chance of showers by
midnight. waves 1 to 3 feet building to 2 to 4 feet . 


$$

fzus63 kmkx 090801
glflm 
expires:202609091515;;154383

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
301 am cdt wed sep 9 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...

low pressure around 29.3 inches will continue lifting northward
through the hudson bay today, as high pressure of 30.2 inches
builds into the central plains. expect southwesterly winds to
shift to northwesterly this morning into this afternoon as a
cold front moves southeastward. thunderstorms are possible ahead
of and along this front. high pressure gradually moves eastward
into the ohio valley by friday, leading to light and variable
winds across the lake tonight through friday morning. winds then
become southerly and increase as low pressure deepens in the 
central plains once again. isolated gales are possible in the
northern third friday afternoon into friday night. low pressure
lifts into southern ontario friday night, bringing a cold front
with showers and storms and shifting winds to northwesterly 
saturday through saturday night. additional rain and storms are 
possible sunday into monday as a warm front from another 
developing low pressure system lifts through the region.


lmz261-362-364-366-563-565-567-868-091515-
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 am cdt wed sep 9 2026

sheboygan wi to pentwater mi north...

.today...southwest winds 15 to 25 kt increasing to 30 kt. chance
of showers and slight chance of thunderstorms this morning. waves
4 to 6 ft occasionally to 8 ft. 
.tonight...west winds to 30 kt becoming northwest 15 to 25 kt,
then diminishing to 10 to 20 kt late. waves 3 to 5 ft. 
.thursday...northwest winds 10 to 20 kt. waves 1 to 3 ft
subsiding to 1 to 2 ft. 
.thursday night...southeast winds 10 to 15 kt becoming south.
waves 1 to 2 ft. 
.friday...southwest winds 15 to 25 kt becoming south to 30 kt.
waves 1 to 3 ft building to 4 to 6 ft occasionally to 8 ft. 
.friday night...south winds to 30 kt. waves 4 to 7 ft
occasionally to 9 ft. 
.saturday...southwest winds to 30 kt. waves 4 to 7 ft
occasionally to 9 ft subsiding to 4 to 6 ft occasionally to 8 ft.
.sunday...north winds 10 to 15 kt. waves 1 to 2 ft.  

$$

fzus63 kmkx 090801
glflm 
expires:202609091515;;154384

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
301 am cdt wed sep 9 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...

low pressure around 29.3 inches will continue lifting northward
through the hudson bay today, as high pressure of 30.2 inches
builds into the central plains. expect southwesterly winds to
shift to northwesterly this morning into this afternoon as a
cold front moves southeastward. thunderstorms are possible ahead
of and along this front. high pressure gradually moves eastward
into the ohio valley by friday, leading to light and variable
winds across the lake tonight through friday morning. winds then
become southerly and increase as low pressure deepens in the 
central plains once again. isolated gales are possible in the
northern third friday afternoon into friday night. low pressure
lifts into southern ontario friday night, bringing a cold front
with showers and storms and shifting winds to northwesterly 
saturday through saturday night. additional rain and storms are 
possible sunday into monday as a warm front from another 
developing low pressure system lifts through the region.


lmz080-669-671-673-675-777-779-870-872-874-876-878-091515-
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 am cdt wed sep 9 2026

sheboygan wi to pentwater mi south...

.today...southwest winds 15 to 25 kt diminishing to 10 to 20 kt.
showers likely with slight chance of thunderstorms this morning.
waves 4 to 6 ft occasionally to 8 ft subsiding to 3 to 5 ft. 
.tonight...southwest winds 10 to 20 kt veering to northwest.
waves 2 to 4 ft. 
.thursday...north winds 10 to 15 kt increasing to 10 to 20 kt.
waves 2 to 4 ft. 
.thursday night...northeast winds 10 to 15 kt veering to
southeast 5 to 10 kt. waves 1 to 3 ft. 
.friday...south winds 10 to 20 kt increasing to 30 kt in the
afternoon. waves 1 to 3 ft building to 3 to 5 ft. 
.friday night...south winds 15 to 25 kt. waves 4 to 6 ft
occasionally to 8 ft. 
.saturday...south winds to 30 kt becoming southwest. waves 4 to
6 ft occasionally to 8 ft. 
.sunday...north winds 10 to 15 kt. waves 1 to 3 ft.  

$$

fzus63 kmqt 090801
glfls 
expires:202609092000;;154365

open lake forecast for lake superior
national weather service marquette mi
400 am edt wed sep 9 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 29.4 inch low near hudson bay continues to deepen to around 29.1 
inches by this afternoon, then moves into northern quebec by early 
thursday. an associated cold front moves through today, shifting 
winds over to the west with widespread gales through the daytime 
hours. ridging to 30.0 inches and subsequent calmer conditions 
follow from early thursday morning until friday morning, when a 
trough of 29.3 inches tracks from the great plains north toward 
hudson bay. friday through saturday morning, a tight pressure 
gradient between 29.6 and 29.9 inches sits over lake superior as the 
plains low shifts rapidly north, tracking through minnesota. expect 
breezy southerly flow friday afternoon through saturday morning as a 
result of this low's passage, and strong westerlies throughout the 
day on saturday. ridging begins to build back in saturday, reaching 
29.9 inches by sunday morning.




lsz267-092000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
400 am edt wed sep 9 2026

...gale warning in effect from 3 pm edt this afternoon through
late tonight...

.early this morning...southwest winds 15 to 25 knots. waves 3 to
5 feet occasionally to 7 feet. 
.today...west winds 15 to 25 knots increasing to gales to
35 knots. waves subsiding to 2 to 4 feet, then building to 7 to
10 feet occasionally to 13 feet. 
.tonight...northwest gales to 40 knots diminishing to 20 to
30 knots late. waves subsiding to 6 to 9 feet occasionally to
11 feet. 
.thursday...northwest winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon. waves subsiding to 2 to 4 feet. 
.thursday night...west winds 5 to 15 knots becoming south 10 to
20 knots after midnight. waves subsiding to calm to 2 feet, then
building to 1 to 3 feet. 
.friday...south winds 15 to 25 knots. waves building to 3 to
5 feet occasionally to 7 feet. 
.friday night...south winds 20 to 30 knots. a chance of showers
after midnight. waves building to 3 to 6 feet occasionally to
8 feet. 
.saturday...west winds 20 to 30 knots diminishing to 15 to
25 knots. showers likely. waves 3 to 6 feet occasionally to
8 feet. 
.sunday...northwest winds 10 to 20 knots. waves subsiding to calm
to 2 feet. 

$$

fzus63 kmqt 090801
glfls 
expires:202609092000;;154360

open lake forecast for lake superior
national weather service marquette mi
400 am edt wed sep 9 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 29.4 inch low near hudson bay continues to deepen to around 29.1 
inches by this afternoon, then moves into northern quebec by early 
thursday. an associated cold front moves through today, shifting 
winds over to the west with widespread gales through the daytime 
hours. ridging to 30.0 inches and subsequent calmer conditions 
follow from early thursday morning until friday morning, when a 
trough of 29.3 inches tracks from the great plains north toward 
hudson bay. friday through saturday morning, a tight pressure 
gradient between 29.6 and 29.9 inches sits over lake superior as the 
plains low shifts rapidly north, tracking through minnesota. expect 
breezy southerly flow friday afternoon through saturday morning as a 
result of this low's passage, and strong westerlies throughout the 
day on saturday. ridging begins to build back in saturday, reaching 
29.9 inches by sunday morning.




lsz162-092000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am edt wed sep 9 2026 /300 am cdt wed sep 9 2026/

...gale warning in effect from 8 am edt /7 am cdt/ this morning
through this afternoon...

.early this morning...southwest winds 20 to 30 knots. waves 3 to
5 feet occasionally to 7 feet. 
.today...west gales to 35 knots diminishing to 20 to 30 knots
late. waves building to 3 to 6 feet occasionally to 8 feet, then
subsiding to 2 to 4 feet. 
.tonight...west winds 15 to 25 knots diminishing to 5 to
15 knots. waves subsiding to calm to 2 feet. 
.thursday...west winds 5 to 15 knots backing south late. waves
calm to 2 feet. 
.thursday night...south winds 5 to 15 knots increasing to 15 to
25 knots after midnight. waves building to 1 to 3 feet. 
.friday...southwest winds 20 to 30 knots backing south by mid
afternoon. a chance of showers by mid afternoon. waves building
to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to
4 feet. 
.friday night...south winds 20 to 30 knots becoming west 15 to
25 knots after midnight. showers and a chance of thunderstorms.
waves subsiding to 1 to 3 feet, then building to 3 to 5 feet
occasionally to 7 feet. 
.saturday...west winds 15 to 25 knots. waves subsiding to calm to
2 feet. 
.sunday...northwest winds 5 to 15 knots becoming northeast gales
to 35 knots. a chance of showers. waves building to 2 to 4 feet. 

$$

fzus63 kmqt 090801
glfls 
expires:202609092000;;154361

open lake forecast for lake superior
national weather service marquette mi
400 am edt wed sep 9 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 29.4 inch low near hudson bay continues to deepen to around 29.1 
inches by this afternoon, then moves into northern quebec by early 
thursday. an associated cold front moves through today, shifting 
winds over to the west with widespread gales through the daytime 
hours. ridging to 30.0 inches and subsequent calmer conditions 
follow from early thursday morning until friday morning, when a 
trough of 29.3 inches tracks from the great plains north toward 
hudson bay. friday through saturday morning, a tight pressure 
gradient between 29.6 and 29.9 inches sits over lake superior as the 
plains low shifts rapidly north, tracking through minnesota. expect 
breezy southerly flow friday afternoon through saturday morning as a 
result of this low's passage, and strong westerlies throughout the 
day on saturday. ridging begins to build back in saturday, reaching 
29.9 inches by sunday morning.




lsz263-092000-
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-
400 am edt wed sep 9 2026

...gale warning in effect from 8 am edt this morning through this
evening...

.early this morning...west gales to 35 knots. waves 3 to 6 feet
occasionally to 8 feet building to 4 to 7 feet occasionally to
9 feet. 
.today...west gales to 40 knots. waves building to 7 to 10 feet
occasionally to 13 feet, then subsiding to 5 to 8 feet
occasionally to 10 feet. 
.tonight...west gales to 35 knots becoming northwest 20 to
30 knots after midnight, then diminishing to 10 to 20 knots late.
waves subsiding to 1 to 3 feet. 
.thursday...northwest winds 5 to 15 knots becoming southwest
10 to 20 knots in the afternoon. waves subsiding to calm to
2 feet. 
.thursday night...south winds 10 to 20 knots increasing to 15 to
25 knots after midnight. waves building to 2 to 4 feet. 
.friday...south gales to 35 knots. waves building to 3 to 6 feet
occasionally to 8 feet, then subsiding to 2 to 4 feet. 
.friday night...south winds 20 to 30 knots veering southwest
after midnight. showers and a chance of thunderstorms. waves
building to 3 to 5 feet occasionally to 7 feet. 
.saturday...west winds 20 to 30 knots. waves building to 4 to
7 feet occasionally to 9 feet, then subsiding to 2 to 4 feet. 
.sunday...northwest winds 10 to 20 knots becoming east 15 to
25 knots. waves subsiding to calm to 2 feet. 

$$

fzus63 kmqt 090801
glfls 
expires:202609092000;;154362

open lake forecast for lake superior
national weather service marquette mi
400 am edt wed sep 9 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 29.4 inch low near hudson bay continues to deepen to around 29.1 
inches by this afternoon, then moves into northern quebec by early 
thursday. an associated cold front moves through today, shifting 
winds over to the west with widespread gales through the daytime 
hours. ridging to 30.0 inches and subsequent calmer conditions 
follow from early thursday morning until friday morning, when a 
trough of 29.3 inches tracks from the great plains north toward 
hudson bay. friday through saturday morning, a tight pressure 
gradient between 29.6 and 29.9 inches sits over lake superior as the 
plains low shifts rapidly north, tracking through minnesota. expect 
breezy southerly flow friday afternoon through saturday morning as a 
result of this low's passage, and strong westerlies throughout the 
day on saturday. ridging begins to build back in saturday, reaching 
29.9 inches by sunday morning.




lsz264-092000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
400 am edt wed sep 9 2026

...gale warning in effect from 8 am edt this morning through this
evening...

.early this morning...west gales to 35 knots. waves 3 to 6 feet
occasionally to 8 feet building to 4 to 7 feet occasionally to
9 feet. 
.today...west gales to 45 knots. waves building to 7 to 11 feet
occasionally to 14 feet. 
.tonight...northwest gales to 35 knots diminishing to 10 to
20 knots. waves subsiding to 2 to 4 feet. 
.thursday...northwest winds 5 to 15 knots backing southwest late.
waves subsiding to calm to 2 feet. 
.thursday night...south winds 5 to 15 knots increasing to 15 to
25 knots after midnight. waves building to 1 to 3 feet. 
.friday...south winds 20 to 30 knots diminishing to 15 to
25 knots by mid afternoon. waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 2 to 4 feet. 
.friday night...south winds 15 to 25 knots. showers and a chance
of thunderstorms. waves building to 3 to 6 feet occasionally to
8 feet. 
.saturday...west gales to 35 knots diminishing to 20 to 30 knots.
waves building to 4 to 7 feet occasionally to 9 feet, then
subsiding to 3 to 5 feet occasionally to 7 feet. 
.sunday...west winds 5 to 15 knots increasing to 10 to 20 knots.
waves subsiding to calm to 2 feet. 

$$

fzus63 kmqt 090801
glfls 
expires:202609092000;;154363

open lake forecast for lake superior
national weather service marquette mi
400 am edt wed sep 9 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 29.4 inch low near hudson bay continues to deepen to around 29.1 
inches by this afternoon, then moves into northern quebec by early 
thursday. an associated cold front moves through today, shifting 
winds over to the west with widespread gales through the daytime 
hours. ridging to 30.0 inches and subsequent calmer conditions 
follow from early thursday morning until friday morning, when a 
trough of 29.3 inches tracks from the great plains north toward 
hudson bay. friday through saturday morning, a tight pressure 
gradient between 29.6 and 29.9 inches sits over lake superior as the 
plains low shifts rapidly north, tracking through minnesota. expect 
breezy southerly flow friday afternoon through saturday morning as a 
result of this low's passage, and strong westerlies throughout the 
day on saturday. ridging begins to build back in saturday, reaching 
29.9 inches by sunday morning.




lsz265-092000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
400 am edt wed sep 9 2026

...gale warning in effect from 8 am edt this morning through this
evening...

.early this morning...west winds 20 to 30 knots. waves 2 to
4 feet. 
.today...west gales to 45 knots. waves building to 5 to 9 feet
occasionally to 11 feet. 
.tonight...west gales to 35 knots veering northwest after
midnight, then diminishing to 15 to 25 knots late. waves
subsiding to 2 to 4 feet. 
.thursday...northwest winds 15 to 25 knots diminishing to 5 to
15 knots. waves subsiding to calm to 2 feet. 
.thursday night...south winds 5 to 15 knots increasing to 15 to
25 knots after midnight. waves calm to 2 feet. 
.friday...south winds 20 to 30 knots diminishing to 15 to
25 knots by mid afternoon. waves building to 2 to 4 feet. 
.friday night...south winds 20 to 30 knots increasing to gales to
35 knots after midnight. a chance of showers through midnight. a
chance of thunderstorms. showers after midnight. waves building
to 3 to 5 feet occasionally to 7 feet. 
.saturday...west winds 20 to 30 knots diminishing to 15 to
25 knots. waves building to 3 to 6 feet occasionally to 8 feet. 
.sunday...northwest winds 10 to 20 knots increasing to 15 to
25 knots. a chance of showers. waves subsiding to calm to 2 feet.

$$

fzus63 kmqt 090801
glfls 
expires:202609092000;;154364

open lake forecast for lake superior
national weather service marquette mi
400 am edt wed sep 9 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 29.4 inch low near hudson bay continues to deepen to around 29.1 
inches by this afternoon, then moves into northern quebec by early 
thursday. an associated cold front moves through today, shifting 
winds over to the west with widespread gales through the daytime 
hours. ridging to 30.0 inches and subsequent calmer conditions 
follow from early thursday morning until friday morning, when a 
trough of 29.3 inches tracks from the great plains north toward 
hudson bay. friday through saturday morning, a tight pressure 
gradient between 29.6 and 29.9 inches sits over lake superior as the 
plains low shifts rapidly north, tracking through minnesota. expect 
breezy southerly flow friday afternoon through saturday morning as a 
result of this low's passage, and strong westerlies throughout the 
day on saturday. ridging begins to build back in saturday, reaching 
29.9 inches by sunday morning.




lsz266-092000-
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-
400 am edt wed sep 9 2026

...gale warning in effect from 8 am edt this morning through this
evening...

.early this morning...west winds 20 to 30 knots. waves 3 to
6 feet occasionally to 8 feet. 
.today...west gales to 40 knots. waves building to 7 to 11 feet
occasionally to 14 feet. 
.tonight...northwest gales to 35 knots diminishing to 15 to
25 knots. waves subsiding to 4 to 7 feet occasionally to 9 feet. 
.thursday...northwest winds 10 to 20 knots diminishing to 5 to
15 knots late. waves subsiding to 1 to 3 feet. 
.thursday night...south winds 5 to 15 knots increasing to 15 to
25 knots after midnight. waves subsiding to calm to 2 feet, then
building to 2 to 4 feet. 
.friday...south winds 20 to 30 knots. waves building to 3 to
6 feet occasionally to 8 feet. 
.friday night...south gales to 40 knots. a chance of
thunderstorms. showers after midnight. waves building to 5 to
8 feet occasionally to 10 feet. 
.saturday...west winds 20 to 30 knots. a chance of showers. waves
subsiding to 3 to 6 feet occasionally to 8 feet. 
.sunday...northwest winds 10 to 20 knots increasing to 15 to
25 knots. waves subsiding to calm to 2 feet. 

$$