fzus61 kbuf 102003
glflo 
expires:202609110300;;235127

open lake forecast for lake ontario
national weather service buffalo ny
402 pm edt thu sep 10 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 high pressure ridge averaging 30.0 inches builds from 
the western great lakes through friday, before exiting toward the 
new england coast on saturday. a warm front will sweep northeastward 
across lake ontario saturday evening through saturday night before a 
cold front sweeps eastward across lake ontario on sunday. behind the 
cold front, a 30.1 inch ridge will slide eastward across the lake 
through monday. on tuesday, the ridge should exit toward new england 
and allow a warm front to sweep northeastward across lake ontario.


loz062-110300-
lake ontario open waters from the niagara river to hamlin beach-
402 pm edt thu sep 10 2026

.tonight...northwest winds 15 to 20 knots diminishing to 10 to
15 knots. waves 1 to 3 feet. 
.friday...northwest winds 10 knots or less becoming southwest.
waves 1 foot or less. 
.friday night...southwest winds 10 knots or less becoming
southeast. waves 1 foot or less. 
.saturday...south winds 10 knots or less becoming southeast.
waves 1 foot or less. 
.saturday night...southeast winds 5 to 10 knots becoming
southwest. waves 1 foot or less. 
.sunday...west winds 10 to 15 knots becoming northwest. a chance
of showers sunday night. waves 1 to 2 feet. 
.monday...north winds 5 to 15 knots becoming southeast. waves
1 to 3 feet. 
.tuesday...south winds 15 to 20 knots becoming west 10 to
15 knots. a chance of showers during the day, then showers likely
tuesday night. waves 2 to 4 feet building to 3 to 5 feet, then
subsiding to 2 to 3 feet. 

$$

fzus61 kbuf 102003
glflo 
expires:202609110300;;235128

open lake forecast for lake ontario
national weather service buffalo ny
402 pm edt thu sep 10 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 high pressure ridge averaging 30.0 inches builds from 
the western great lakes through friday, before exiting toward the 
new england coast on saturday. a warm front will sweep northeastward 
across lake ontario saturday evening through saturday night before a 
cold front sweeps eastward across lake ontario on sunday. behind the 
cold front, a 30.1 inch ridge will slide eastward across the lake 
through monday. on tuesday, the ridge should exit toward new england 
and allow a warm front to sweep northeastward across lake ontario.


loz063>065-110300-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 pm edt thu sep 10 2026

.tonight...northwest winds 15 to 20 knots becoming north 10 to
15 knots. waves 3 to 5 feet subsiding to 1 to 3 feet. 
.friday...north winds 10 knots or less becoming west. waves
2 feet or less. 
.friday night...west winds 10 knots or less becoming south. waves
1 foot or less. 
.saturday...southeast winds 5 to 15 knots. waves 2 feet or less. 
.saturday night...southeast winds 10 to 15 knots becoming
southwest 15 to 20 knots. a chance of showers. waves 1 to 3 feet.
.sunday...southwest winds 10 to 15 knots becoming northwest 15 to
20 knots. a chance of showers. waves 1 to 3 feet. 
.monday...north winds 5 to 15 knots becoming southeast 15 to
20 knots. waves 1 to 3 feet. 
.tuesday...south winds 15 to 25 knots becoming southwest. a
chance of showers during the day, then showers likely tuesday
night. waves 3 to 5 feet subsiding to 2 to 4 feet. 

$$

fzus61 kcle 101949
glfle 
expires:202609110230;;234677

open lake forecast for lake erie
national weather service cleveland oh
349 pm edt thu sep 10 2026

for waters beyond five nautical miles of shore on lake erie

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

.synopsis...
a cold front will push south of the area tonight, allowing high 
pressure 30.10 inches to build over the area for friday. a warm 
front will lift across the area late friday into early saturday, 
followed by a cold front that will likely slow over northern ohio 
on sunday into monday. the front will lift northeast as a warm
front monday night as a cold front approaches from the west.


lez164>167-110230-
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 pm edt thu sep 10 2026

.tonight...northwest winds 5 to 10 knots becoming northeast.
waves 1 foot or less. 
.friday...northeast winds 5 to 10 knots. waves 1 foot or less. 
.friday night...east winds 5 to 10 knots becoming southeast.
waves 2 feet or less. 
.saturday...south winds 5 to 10 knots becoming southwest. a
chance of showers. waves 2 feet or less. 
.saturday night...southwest winds 5 to 15 knots. a chance of
showers in the evening. waves 2 feet or less. 
.sunday...west winds 5 to 15 knots becoming north 15 to 20 knots.
waves 1 to 3 feet. 
.monday...northeast winds 15 to 20 knots becoming south. waves
2 to 4 feet subsiding to 1 to 3 feet. 
.tuesday...south winds 15 to 20 knots becoming west 10 to
15 knots. a chance of showers during the day, then showers likely
with a chance of thunderstorms tuesday night. waves 2 to 4 feet
subsiding to 1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 101949
glfle 
expires:202609110230;;234676

open lake forecast for lake erie
national weather service cleveland oh
349 pm edt thu sep 10 2026

for waters beyond five nautical miles of shore on lake erie

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

.synopsis...
a cold front will push south of the area tonight, allowing high 
pressure 30.10 inches to build over the area for friday. a warm 
front will lift across the area late friday into early saturday, 
followed by a cold front that will likely slow over northern ohio 
on sunday into monday. the front will lift northeast as a warm
front monday night as a cold front approaches from the west.


lez162-163-110230-
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 pm edt thu sep 10 2026

.tonight...northwest winds 5 to 10 knots becoming northeast.
waves 1 foot or less. 
.friday...northeast winds 5 to 10 knots becoming east. waves
1 foot or less. 
.friday night...east winds around 10 knots becoming southeast.
waves 2 feet or less. 
.saturday...south winds 5 to 10 knots. a chance of showers. waves
1 foot or less. 
.saturday night...southwest winds 5 to 10 knots becoming west.
waves 1 foot or less. 
.sunday...west winds 5 to 15 knots becoming north 15 to 20 knots.
waves 1 to 3 feet. 
.monday...northeast winds 15 to 20 knots becoming south. waves
1 to 3 feet. 
.tuesday...south winds 15 to 20 knots becoming west 10 to
15 knots. a chance of showers and thunderstorms during the day,
then showers likely tuesday night. waves 1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 101949
glfle 
expires:202609110230;;234678

open lake forecast for lake erie
national weather service cleveland oh
349 pm edt thu sep 10 2026

for waters beyond five nautical miles of shore on lake erie

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

.synopsis...
a cold front will push south of the area tonight, allowing high 
pressure 30.10 inches to build over the area for friday. a warm 
front will lift across the area late friday into early saturday, 
followed by a cold front that will likely slow over northern ohio 
on sunday into monday. the front will lift northeast as a warm
front monday night as a cold front approaches from the west.


lez061-168-169-110230-
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 pm edt thu sep 10 2026

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

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 101940
glfsc 
expires:202609110345;;234432

lake st clair forecast
national weather service detroit/pontiac mi
340 pm edt thu sep 10 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...high pressure, 30.00 inches, expands into the region
latter half of thursday. this high then drifts over the central
great lakes through friday night.


lcz460-110345-
lake st clair-
340 pm edt thu sep 10 2026

.tonight...north winds 5 to 10 knots veering to the northeast after
midnight. partly cloudy in the evening then clearing. waves 2 feet
or less.
.friday...northeast winds 5 to 10 knots in the morning becoming
light and variable...then becoming southeast 5 to 10 knots late in
the afternoon. sunny. waves 2 feet or less.
.friday night...southeast winds 10 to 15 knots diminishing to 5 to
10 knots after midnight. partly cloudy. waves 2 feet or less.
.saturday...south winds 5 to 10 knots increasing to 10 to 15 knots
in the late morning and afternoon. partly sunny. waves 2 feet or
less.
.saturday night...southwest winds 5 to 10 knots veering to the west
after midnight. partly cloudy. waves 2 feet or less.
.sunday...northwest winds 5 to 10 knots becoming north 10 to 15
knots in the evening. mostly sunny in the morning becoming partly
cloudy. waves 2 feet or less.
.monday...southeast winds 15 to 20 knots. partly cloudy. waves 1 to
3 feet.
.tuesday...west winds 15 to 20 knots. partly cloudy. showers likely.
waves 1 to 3 feet.

$$

fzus63 kdtx 101939
glflh 
expires:202609110345;;234430

open lake forecast for lake huron
national weather service detroit/pontiac mi
339 pm edt thu sep 10 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...high pressure, 30.00 inches, expands into the region
latter half of thursday. this high then drifts over the central
great lakes through friday night.


lhz463-464-110345-
lake huron from harbor beach to port sanilac beyond 5nm off shore-
lake huron from port sanilac to port huron beyond 5nm off shore-
339 pm edt thu sep 10 2026

.tonight...north winds 5 to 10 knots  becoming light and
variable. waves 2 feet or less. 
.friday...light and variable winds becoming southeast 5 to
10 knots late in the afternoon. waves 2 feet or less. 
.friday night...southeast winds 5 to 10 knots increasing to 10 to
15 knots in the late evening and overnight. waves 2 feet or less.
.saturday...south winds 10 to 15 knots. waves 1 to 3 feet. 
.saturday night...south winds 10 to 15 knots veering to the west
after midnight. waves 2 feet or less. 
.sunday...north winds 5 to 10 knots increasing to 15 to 20 knots.
waves 1 to 3 feet. 
.monday...north winds 10 to 15 knots becoming northeast 5 to
10 knots in the late morning and early afternoon...then veering
to the east early in the evening becoming southeast 15 to
20 knots with gusts to around 30 knots by midnight. a chance of.
waves 1 to 3 feet building to 3 to 5 feet . 
.tuesday...south winds 20 to 25 knots with gusts to 35 knot gales
decreasing to 15 to 20 knots with gusts to around 30 knots until
early evening...then becoming west 10 to 15 knots by midnight. a
chance of showers. waves 3 to 5 feet. 


$$

fzus63 kdtx 101939
glflh 
expires:202609110345;;234428

open lake forecast for lake huron
national weather service detroit/pontiac mi
339 pm edt thu sep 10 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...high pressure, 30.00 inches, expands into the region
latter half of thursday. this high then drifts over the central
great lakes through friday night.


lhz361-362-110345-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
lake huron from presque isle light to sturgeon point mi beyond
5nm off shore-
339 pm edt thu sep 10 2026

.tonight...northwest winds 10 to 15 knots decreasing to 5 to
10 knots by midnight...then becoming light and variable early in
the morning. waves 2 to 4 feet subsiding to 1 to 3 feet in the
late evening and overnight. 
.friday...light and variable winds becoming south 10 to 15 knots.
waves 2 feet or less. 
.friday night...south winds 10 to 15 knots. waves 2 to 4 feet. 
.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 afternoon. a chance of
showers in the afternoon. waves 2 to 4 feet. 
.saturday night...south winds 10 to 15 knots veering to the
northwest in the late evening and overnight. a chance of showers
in the evening. waves 2 to 4 feet subsiding to 1 to 3 feet in the
late evening and overnight. 
.sunday...west winds 10 to 15 knots becoming northwest 15 to
20 knots with gusts to around 30 knots late in the afternoon...
then decreasing to 10 to 15 knots late in the evening. waves 1 to
3 feet building to 2 to 4 feet. 
.monday...north winds 5 to 10 knots veering to the northeast in
the late morning and early afternoon...then becoming southeast
15 to 20 knots with gusts to 35 knot gales early in the evening
becoming south 20 to 25 knots with gusts to 40 knot gales by
midnight. a chance of thunderstorms early in the evening. a
chance of showers and thunderstorms by midnight. waves 1 to
3 feet building to 6 to 9 feet. waves occasionally around
12 feet. 
.tuesday...south winds to 30 knots with gusts to 40 knot gales
decreasing to 20 to 25 knots with gusts to 40 knot gales in the
late morning and early afternoon...then becoming southwest 15 to
20 knots with gusts to around 30 knots early in the evening
veering to the west by midnight. showers likely early in the
morning. a chance of showers in the late morning and early
afternoon. waves 6 to 9 feet. waves occasionally around 12 feet. 


$$

fzus63 kdtx 101939
glflh 
expires:202609110345;;234429

open lake forecast for lake huron
national weather service detroit/pontiac mi
339 pm edt thu sep 10 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...high pressure, 30.00 inches, expands into the region
latter half of thursday. this high then drifts over the central
great lakes through friday night.


lhz363-462-110345-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
lake huron from port austin to harbor beach beyond 5nm off shore-
339 pm edt thu sep 10 2026

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


$$

fzus63 kmkx 101851
glflm 
expires:202609110315;;232522

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
151 pm cdt thu sep 10 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...

high pressure near 30.1 inches will linger through tonight across
the open waters, bringing light and variable winds. a new area of
low pressure near 30.0 inches will shift from central canada 
toward the hudson bay friday morning through the day saturday, 
bringing increasing south-southwest winds followed by a west- 
northwest wind shift behind a cold front. occasional wind gusts 
near gale force are possible during this time frame, though 
whether or not they will be widespread enough to warrant headlines
remains uncertain. trends will continue to be monitored through 
the end of this week. scattered showers and storms will accompany 
the approaching/passing front, with widespread severe weather not 
currently anticipated.

high pressure near 30.1 inches will shift from the northern great
plains across lake michigan saturday night through sunday night, 
bringing light and variable winds. the next area of low pressure &
cold front will approach from the west early next week, bringing 
increasing winds & additional chances for showers and storms. 
depending on the strength of the low and front, periods of gales &
some stronger storms could be possible. will be providing 
additional details as this portion of the period draws closer. 


lmz261-362-364-366-563-565-567-868-110315-
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-
151 pm cdt thu sep 10 2026

sheboygan wi to pentwater mi north...

.tonight...south winds 10 to 15 kt becoming southwest 10 to
20 kt. waves 1 to 3 ft. 
.friday...southwest winds 10 to 20 kt becoming south to 30 kt.
waves 2 to 4 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. chance of showers. waves
4 to 6 ft occasionally to 8 ft. 
.saturday night...northwest winds 10 to 20 kt. waves 4 to 6 ft
occasionally to 8 ft. 
.sunday...northwest winds 10 to 20 kt. waves 4 to 6 ft
occasionally to 8 ft. 
.sunday night...north winds 15 to 25 kt becoming northeast 10 to
20 kt. waves 4 to 6 ft occasionally to 8 ft. 
.monday...east winds 15 to 25 kt becoming southeast gales to
35 kt. chance of showers. waves 4 to 6 ft occasionally to 8 ft. 
.tuesday...southwest gales to 35 kt becoming west gales to 35 kt.
chance of showers. waves 4 to 6 ft occasionally to 8 ft. 

$$

fzus63 kmkx 101851
glflm 
expires:202609110315;;232523

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
151 pm cdt thu sep 10 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...

high pressure near 30.1 inches will linger through tonight across
the open waters, bringing light and variable winds. a new area of
low pressure near 30.0 inches will shift from central canada 
toward the hudson bay friday morning through the day saturday, 
bringing increasing south-southwest winds followed by a west- 
northwest wind shift behind a cold front. occasional wind gusts 
near gale force are possible during this time frame, though 
whether or not they will be widespread enough to warrant headlines
remains uncertain. trends will continue to be monitored through 
the end of this week. scattered showers and storms will accompany 
the approaching/passing front, with widespread severe weather not 
currently anticipated.

high pressure near 30.1 inches will shift from the northern great
plains across lake michigan saturday night through sunday night, 
bringing light and variable winds. the next area of low pressure &
cold front will approach from the west early next week, bringing 
increasing winds & additional chances for showers and storms. 
depending on the strength of the low and front, periods of gales &
some stronger storms could be possible. will be providing 
additional details as this portion of the period draws closer. 


lmz080-669-671-673-675-777-779-870-872-874-876-878-110315-
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-
151 pm cdt thu sep 10 2026

sheboygan wi to pentwater mi south...

.tonight...northeast winds 10 to 15 kt veering to southeast.
waves 1 to 2 ft. 
.friday...south winds 10 to 15 kt increasing to 15 to 25 kt.
waves 2 to 4 ft. 
.friday night...southeast winds 15 to 25 kt becoming south 10 to
20 kt. waves 3 to 5 ft. 
.saturday...southwest winds 15 to 25 kt. waves 4 to 6 ft
occasionally to 8 ft. 
.saturday night...west winds 10 to 20 kt becoming northwest.
waves 3 to 5 ft. 
.sunday...north winds 10 to 20 kt. waves 3 to 5 ft. 
.sunday night...north winds 10 to 20 kt becoming northeast. waves
3 to 5 ft. 
.monday...east winds to 30 kt becoming southeast gales to 35 kt.
chance of showers. waves 3 to 5 ft. 
.tuesday...southwest gales to 35 kt becoming west to 30 kt.
chance of showers. waves 3 to 5 ft.  

$$

fzus63 kmqt 102001
glfls 
expires:202609110800;;235047

open lake forecast for lake superior
national weather service marquette mi
401 pm edt thu sep 10 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...

30.0 inch ridging remains over the lake through tonight. a trough 
averaging 29.5 inches tracks from the great plains north toward 
hudson bay by friday afternoon, bringing 29.8 inch troughing to the 
lake. a cold front and 29.7 inch trough passes through on saturday 
with ridging in its wake reaching 30.0 inches by sunday. this 
strengthens further to 30.2 inches monday. 




lsz162-110800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt thu sep 10 2026 /301 pm cdt thu sep 10 2026/

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

$$

fzus63 kmqt 102001
glfls 
expires:202609110800;;235048

open lake forecast for lake superior
national weather service marquette mi
401 pm edt thu sep 10 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...

30.0 inch ridging remains over the lake through tonight. a trough 
averaging 29.5 inches tracks from the great plains north toward 
hudson bay by friday afternoon, bringing 29.8 inch troughing to the 
lake. a cold front and 29.7 inch trough passes through on saturday 
with ridging in its wake reaching 30.0 inches by sunday. this 
strengthens further to 30.2 inches monday. 




lsz263-110800-
lake superior from saxon harbor wi to upper entrance to portage
canal mi 5nm off shore to the us/canadian border including isle
royale national park-
401 pm edt thu sep 10 2026

.late this afternoon...south winds 10 to 20 knots. waves calm to
2 feet. 
.tonight...south winds 5 to 15 knots increasing to 10 to 20 knots
after midnight, then becoming southwest 20 to 30 knots late.
waves building to 2 to 4 feet. 
.friday...southwest winds to 30 knots with a few gale force gusts
to 35 knots possible diminishing to 20 to 30 knots late. waves
building to 3 to 6 feet occasionally to 8 feet, then subsiding to
1 to 3 feet. 
.friday night...south winds 20 to 30 knots veering southwest
after midnight. a slight chance of showers through midnight. a
chance of thunderstorms. showers after midnight. waves building
to 2 to 4 feet. 
.saturday...west winds 20 to 30 knots increasing to gales to
35 knots by mid afternoon. a slight chance of showers through
early afternoon. waves building to 3 to 6 feet occasionally to
8 feet. 
.saturday night...northwest winds 20 to 30 knots diminishing to
15 to 25 knots after midnight. waves subsiding to 2 to 4 feet. 
.sunday...northwest winds 15 to 25 knots becoming west 10 to
20 knots by mid afternoon. waves subsiding to calm to 2 feet. 
.sunday night...northwest winds 5 to 15 knots backing southeast
after midnight. waves calm to 2 feet. 
.monday...southeast gales to 35 knots becoming south gales to
40 knots. showers. waves building to 5 to 8 feet occasionally to
10 feet. 
.tuesday...west gales to 40 knots becoming northwest 20 to
30 knots. waves building to 6 to 9 feet occasionally to 11 feet,
then subsiding to calm to 2 feet. 

$$

fzus63 kmqt 102001
glfls 
expires:202609110800;;235049

open lake forecast for lake superior
national weather service marquette mi
401 pm edt thu sep 10 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...

30.0 inch ridging remains over the lake through tonight. a trough 
averaging 29.5 inches tracks from the great plains north toward 
hudson bay by friday afternoon, bringing 29.8 inch troughing to the 
lake. a cold front and 29.7 inch trough passes through on saturday 
with ridging in its wake reaching 30.0 inches by sunday. this 
strengthens further to 30.2 inches monday. 




lsz264-110800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
401 pm edt thu sep 10 2026

.late this afternoon...southwest winds 5 to 15 knots. waves calm
to 2 feet. 
.tonight...south winds 5 to 15 knots increasing to 15 to
25 knots. waves building to 2 to 4 feet. 
.friday...southwest winds 20 to 30 knots diminishing to 15 to
25 knots in the afternoon. waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 1 to 3 feet. 
.friday night...south winds 10 to 20 knots increasing to 15 to
25 knots after midnight, then veering southwest late. a chance of
showers and a slight chance of thunderstorms. waves building to
2 to 4 feet. 
.saturday...west winds 20 to 30 knots increasing to gales to
35 knots by mid afternoon. a slight chance of showers through
early afternoon. waves building to 3 to 6 feet occasionally to
8 feet. 
.saturday night...west winds 20 to 30 knots becoming northwest
15 to 25 knots after midnight. waves subsiding to 3 to 5 feet
occasionally to 7 feet. 
.sunday...northwest winds 15 to 25 knots. waves subsiding to 1 to
3 feet. 
.sunday night...northwest winds 5 to 15 knots veering north after
midnight. waves subsiding to calm to 2 feet. 
.monday...southeast gales to 35 knots veering south. a chance of
showers, then showers. waves building to 5 to 9 feet occasionally
to 11 feet. 
.tuesday...west gales to 40 knots becoming northwest 20 to
30 knots. waves building to 6 to 9 feet occasionally to 11 feet,
then subsiding to 1 to 3 feet. 

$$

fzus63 kmqt 102001
glfls 
expires:202609110800;;235050

open lake forecast for lake superior
national weather service marquette mi
401 pm edt thu sep 10 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...

30.0 inch ridging remains over the lake through tonight. a trough 
averaging 29.5 inches tracks from the great plains north toward 
hudson bay by friday afternoon, bringing 29.8 inch troughing to the 
lake. a cold front and 29.7 inch trough passes through on saturday 
with ridging in its wake reaching 30.0 inches by sunday. this 
strengthens further to 30.2 inches monday. 




lsz265-110800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
401 pm edt thu sep 10 2026

.late this afternoon...southeast winds 5 to 15 knots. waves calm
to 2 feet. 
.tonight...south winds 5 to 15 knots increasing to 15 to 25 knots
after midnight, then veering southwest late. waves calm to
2 feet. 
.friday...southwest winds 20 to 30 knots becoming south 15 to
25 knots in the afternoon, then increasing to 20 to 30 knots
late. waves building to 1 to 3 feet. 
.friday night...south winds 15 to 25 knots increasing to 20 to
30 knots after midnight. a chance of showers. a slight chance of
thunderstorms after midnight. waves building to 2 to 4 feet. 
.saturday...west winds 20 to 30 knots increasing to gales to
35 knots by mid afternoon. a slight chance of showers through
early afternoon. waves building to 3 to 6 feet occasionally to
8 feet. 
.saturday night...west winds 20 to 30 knots veering northwest
after midnight. waves subsiding to 3 to 6 feet occasionally to
8 feet. 
.sunday...northwest winds 20 to 30 knots. waves subsiding to 2 to
4 feet. 
.sunday night...northwest winds 10 to 20 knots. waves subsiding
to calm to 2 feet. 
.monday...southeast gales to 40 knots veering south. a chance of
showers, then showers. waves building to 5 to 9 feet occasionally
to 11 feet. 
.tuesday...west gales to 40 knots becoming northwest 20 to
30 knots. waves building to 6 to 9 feet occasionally to 11 feet,
then subsiding to 1 to 3 feet. 

$$

fzus63 kmqt 102001
glfls 
expires:202609110800;;235051

open lake forecast for lake superior
national weather service marquette mi
401 pm edt thu sep 10 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...

30.0 inch ridging remains over the lake through tonight. a trough 
averaging 29.5 inches tracks from the great plains north toward 
hudson bay by friday afternoon, bringing 29.8 inch troughing to the 
lake. a cold front and 29.7 inch trough passes through on saturday 
with ridging in its wake reaching 30.0 inches by sunday. this 
strengthens further to 30.2 inches monday. 




lsz266-110800-
lake superior east of a line from manitou island to marquette mi
and west of a line from grand marais mi to the us/canadian border
beyond 5nm from shore-
401 pm edt thu sep 10 2026

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

$$

fzus63 kmqt 102001
glfls 
expires:202609110800;;235052

open lake forecast for lake superior
national weather service marquette mi
401 pm edt thu sep 10 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...

30.0 inch ridging remains over the lake through tonight. a trough 
averaging 29.5 inches tracks from the great plains north toward 
hudson bay by friday afternoon, bringing 29.8 inch troughing to the 
lake. a cold front and 29.7 inch trough passes through on saturday 
with ridging in its wake reaching 30.0 inches by sunday. this 
strengthens further to 30.2 inches monday. 




lsz267-110800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
401 pm edt thu sep 10 2026

.late this afternoon...west winds 5 to 15 knots. waves 2 to
4 feet subsiding to 1 to 3 feet. 
.tonight...west winds 5 to 15 knots backing south after midnight,
then increasing to 10 to 20 knots late. waves subsiding to calm
to 2 feet, then building to 1 to 3 feet. 
.friday...south winds 15 to 25 knots. waves building to 2 to
4 feet. 
.friday night...south winds 20 to 30 knots. a chance of showers
and a slight chance of thunderstorms after midnight. waves
building to 3 to 6 feet occasionally to 8 feet. 
.saturday...southwest winds 20 to 30 knots veering west by mid
afternoon. a slight chance of thunderstorms through early
afternoon. a chance of showers. waves building to 3 to 6 feet
occasionally to 8 feet. 
.saturday night...west winds 20 to 30 knots veering northwest
after midnight. waves building to 4 to 7 feet occasionally to
9 feet. 
.sunday...northwest winds 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. 
.sunday night...northwest winds 10 to 20 knots becoming north
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.monday...southeast winds 15 to 25 knots becoming south gales to
40 knots. a chance of showers, then showers. waves building to
7 to 10 feet occasionally to 13 feet. 
.tuesday...west gales to 40 knots becoming northwest 15 to
25 knots. waves building to 8 to 11 feet occasionally to 14 feet,
then subsiding to 2 to 4 feet. 

$$