fzus61 kbuf 182002
glflo 
expires:202509190300;;208214

open lake forecast for lake ontario
national weather service buffalo ny
402 pm edt thu sep 18 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...high pressure averaging 30.0 inches draped from the ohio 
valley to new england will gradually weaken in place today. a weak 
cold front will then cross the lake this evening, with another 30.4 
inch high then settling from central ontario to new england friday 
through saturday night, then off the new england coast sunday and 
monday.


loz063>065-190300-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 pm edt thu sep 18 2025

.tonight...west winds 10 to 15 knots becoming north 15 to
20 knots. waves 1 to 3 feet building to 2 to 4 feet. 
.friday...north winds 15 to 20 knots diminishing to 5 to
15 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.friday night...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 diminishing to 10 to
15 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.saturday night...northeast winds 10 to 15 knots becoming
southeast 15 to 20 knots. waves 1 to 3 feet. 
.sunday...southeast winds 15 to 20 knots becoming south. a chance
of showers sunday night. waves 1 to 3 feet building to 2 to
4 feet. 
.monday...south winds 15 to 20 knots becoming southwest and
diminishing to 5 to 10 knots. a chance of showers. waves 2 to
4 feet subsiding to 1 to 3 feet. 
.tuesday...southwest winds 5 to 10 knots becoming west. a chance
of showers. waves 2 feet or less. 

$$

fzus61 kbuf 182002
glflo 
expires:202509190300;;208213

open lake forecast for lake ontario
national weather service buffalo ny
402 pm edt thu sep 18 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...high pressure averaging 30.0 inches draped from the ohio 
valley to new england will gradually weaken in place today. a weak 
cold front will then cross the lake this evening, with another 30.4 
inch high then settling from central ontario to new england friday 
through saturday night, then off the new england coast sunday and 
monday.


loz062-190300-
lake ontario open waters from the niagara river to hamlin beach-
402 pm edt thu sep 18 2025

.tonight...northwest winds 10 to 15 knots becoming northeast.
waves 1 to 3 feet. 
.friday...northeast winds 5 to 15 knots becoming east less than
10 knots. waves 1 to 3 feet subsiding to 1 foot or less. 
.friday night...east winds 10 knots or less increasing to 15 to
20 knots overnight. waves 2 feet or less building to 3 to 5 feet.
.saturday...east winds 15 to 20 knots. waves 3 to 5 feet. 
.saturday night...east winds 15 to 20 knots. waves 3 to 5 feet
subsiding to 2 to 4 feet. 
.sunday...southeast winds 10 to 15 knots becoming south. a chance
of showers sunday night. waves 1 to 3 feet. 
.monday...south winds 10 to 15 knots becoming southwest. a chance
of showers. waves 1 to 2 feet. 
.tuesday...west winds 5 to 10 knots becoming north. a chance of
showers. waves 1 to 2 feet. 

$$

fzus61 kcle 181941
glfle 
expires:202509190215;;207359

open lake forecast for lake erie
national weather service cleveland oh
341 pm edt thu sep 18 2025

for waters beyond five nautical miles of shore on lake erie

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

.synopsis...
high pressure ridging averaging 30.20 inches and extending from
new england lingers over lake erie for the time being. a cold 
front will sweep southward across the lake this evening through
the wee hours of friday morning. behind the front, another ridge 
averaging 30.20 inches affects lake erie as the parent high 
pressure center moves from near hudson bay to near maine by
daybreak sunday. a warm front should drift northward across lake 
erie on sunday through sunday night. behind the front, another 
ridge averaging 30.00 inches should build from the southern 
appalachians through this tuesday.


lez162-163-190215-
detroit river lt. to maumee bay oh to reno beach oh beyond 5nm
offshoreline to us-canadian border-
reno beach to the islands oh beyond 5nm off shoreline to us-
canadian border-
341 pm edt thu sep 18 2025

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

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 181941
glfle 
expires:202509190215;;207360

open lake forecast for lake erie
national weather service cleveland oh
341 pm edt thu sep 18 2025

for waters beyond five nautical miles of shore on lake erie

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

.synopsis...
high pressure ridging averaging 30.20 inches and extending from
new england lingers over lake erie for the time being. a cold 
front will sweep southward across the lake this evening through
the wee hours of friday morning. behind the front, another ridge 
averaging 30.20 inches affects lake erie as the parent high 
pressure center moves from near hudson bay to near maine by
daybreak sunday. a warm front should drift northward across lake 
erie on sunday through sunday night. behind the front, another 
ridge averaging 30.00 inches should build from the southern 
appalachians through this tuesday.


lez164>168-190215-
the islands to vermilion oh beyond 5 nm off shoreline to us-
canadian border-
vermilion to avon point oh beyond 5 nm off shoreline to us-
canadian border-
avon point to willowick oh beyond 5 nm off shoreline to us-
canadian border-willowick to geneva-on-the-
lake oh beyond 5nm off shoreline to us-canadian border-geneva-on-
the-lake to conneaut oh beyond 5 nm off shoreline to us-
canadian border-
341 pm edt thu sep 18 2025

.tonight...southwest winds 5 to 10 knots becoming northeast.
waves 1 foot or less. 
.friday...northeast winds 5 to 15 knots. waves 2 feet or less. 
.friday night...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
10 to 15 knots. waves 3 to 6 feet subsiding to 2 to 4 feet. 
.sunday...south winds 5 to 15 knots increasing to 15 to 20 knots.
a chance of showers and thunderstorms sunday night. waves 1 to
3 feet building to 2 to 4 feet. 
.monday...southwest winds 15 to 20 knots diminishing to 5 to
15 knots. a chance of showers. waves 2 to 4 feet subsiding to
1 to 3 feet. 
.tuesday...west winds 5 to 10 knots becoming south. a chance of
showers. waves 2 feet or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 181941
glfle 
expires:202509190215;;207361

open lake forecast for lake erie
national weather service cleveland oh
341 pm edt thu sep 18 2025

for waters beyond five nautical miles of shore on lake erie

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

.synopsis...
high pressure ridging averaging 30.20 inches and extending from
new england lingers over lake erie for the time being. a cold 
front will sweep southward across the lake this evening through
the wee hours of friday morning. behind the front, another ridge 
averaging 30.20 inches affects lake erie as the parent high 
pressure center moves from near hudson bay to near maine by
daybreak sunday. a warm front should drift northward across lake 
erie on sunday through sunday night. behind the front, another 
ridge averaging 30.00 inches should build from the southern 
appalachians through this tuesday.


lez061-169-190215-
ripley to buffalo ny extending from 5nm off shoreline to us-
canadian border-
conneaut oh to ripley ny beyond 5 nm off shoreline to us-
canadian border-
341 pm edt thu sep 18 2025

.tonight...southwest winds 5 to 10 knots becoming northeast.
waves 1 to 2 feet. 
.friday...northeast winds 5 to 10 knots. waves 2 feet or less. 
.friday night...northeast winds 10 to 15 knots becoming east.
waves 1 to 3 feet. 
.saturday...east winds 10 to 15 knots increasing to 15 to
20 knots. waves 1 to 3 feet building to 3 to 5 feet. 
.saturday night...northeast winds 15 to 20 knots becoming
southeast 10 to 15 knots. waves 3 to 5 feet subsiding to 1 to
3 feet. 
.sunday...southeast winds 10 to 15 knots becoming south 15 to
20 knots. a chance of showers sunday night. waves 1 to 3 feet
building to 2 to 4 feet. 
.monday...south winds 15 to 20 knots diminishing to 5 to
15 knots. a chance of showers. waves 2 to 4 feet subsiding to
1 to 3 feet. 
.tuesday...southwest winds 5 to 10 knots becoming southeast. a
chance of showers. waves 1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 181937
glfsc 
expires:202509190345;;207287

lake st clair forecast
national weather service detroit/pontiac mi
337 pm edt thu sep 18 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...a weak cold front drops through the region bringing a
chance for scattered rain and storms this afternoon into the
evening, focusing mainly across the saginaw bay region. another
strong high pressure system then begins to build in from northern
ontario, reaching southern quebec on saturday and new england by
sunday.


lcz460-190345-
lake st clair-
337 pm edt thu sep 18 2025

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

$$

fzus63 kdtx 181936
glflh 
expires:202509190345;;207284

open lake forecast for lake huron
national weather service detroit/pontiac mi
336 pm edt thu sep 18 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...a weak cold front drops through the region bringing a
chance for scattered rain and storms this afternoon into the
evening, focusing mainly across the saginaw bay region. another
strong high pressure system then begins to build in from northern
ontario, reaching southern quebec on saturday and new england by
sunday.


lhz462>464-190345-
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-
336 pm edt thu sep 18 2025

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


$$

fzus63 kdtx 181936
glflh 
expires:202509190345;;207283

open lake forecast for lake huron
national weather service detroit/pontiac mi
336 pm edt thu sep 18 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...a weak cold front drops through the region bringing a
chance for scattered rain and storms this afternoon into the
evening, focusing mainly across the saginaw bay region. another
strong high pressure system then begins to build in from northern
ontario, reaching southern quebec on saturday and new england by
sunday.


lhz362-363-190345-
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-
336 pm edt thu sep 18 2025

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


$$

fzus63 kdtx 181936
glflh 
expires:202509190345;;207282

open lake forecast for lake huron
national weather service detroit/pontiac mi
336 pm edt thu sep 18 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...a weak cold front drops through the region bringing a
chance for scattered rain and storms this afternoon into the
evening, focusing mainly across the saginaw bay region. another
strong high pressure system then begins to build in from northern
ontario, reaching southern quebec on saturday and new england by
sunday.


lhz361-190345-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
336 pm edt thu sep 18 2025

.tonight...light and variable winds becoming northeast 5 to
10 knots in the late evening and early morning...then increasing
to 10 to 15 knots early in the morning. waves 2 feet or less. 
.friday...northeast winds 10 to 15 knots becoming east 5 to
10 knots in the afternoon. waves 1 to 3 feet. 
.friday night...east winds 5 to 10 knots increasing to 15 to
20 knots after midnight. waves 2 feet or less building to 2 to
4 feet after midnight. 
.saturday...east winds 15 to 20 knots. gusts to 30 knots early in
the afternoon. waves 4 to 6 feet. waves occasionally around
8 feet. 
.saturday night...east winds 15 to 20 knots becoming southeast
10 to 15 knots in the late evening and overnight. a chance of
showers after midnight. waves 3 to 5 feet. 
.sunday...southeast winds 10 to 15 knots decreasing to 5 to
10 knots late in the afternoon. a chance of showers...then
showers likely late in the afternoon. waves 2 to 4 feet subsiding
to 1 to 3 feet late in the evening. 
.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 morning and early afternoon...then becoming light and
variable early in the evening becoming north 5 to 10 knots in the
late evening and early morning. waves 2 feet or less. 


$$

fzus63 kmkx 181939
glflm 
expires:202509190315;;207300

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
239 pm cdt thu sep 18 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...

light to modest northeast winds over the northern half of the 
lake will gradually expand into the southern half of the lake this
afternoon with the passage of a weak backdoor cold front. light 
to modest northeast winds are then expected tonight becoming 
easterly on friday. breezy east to southeast winds will then 
prevail friday night through saturday morning as canadian high 
pressure strengthens to around 30.4 inches as it moves into the
lower great lakes and southern quebec, and as low pressure around
29.9 inches moves from the eastern dakotas into minnesota. 
intermittent showers and thunderstorms are expected friday night 
through sunday.


lmz080-669-671-673-675-777-779-870-872-874-876-878-190315-
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-
239 pm cdt thu sep 18 2025

sheboygan wi to pentwater mi south...

.tonight...northeast winds 10 to 15 kt becoming east. waves 1 to
3 ft. 
.friday...east winds 10 to 15 kt becoming northeast. waves 1 to
3 ft. 
.friday night...northeast winds 10 to 15 kt becoming east 15 to
25 kt late in the evening, then becoming southeast after midnight
becoming southeast 15 to 25 kt late. chance of showers overnight.
waves 1 to 3 ft building to 4 to 6 ft occasionally to 8 ft. 
.saturday...southeast winds 10 to 20 kt. chance of showers. waves
4 to 6 ft occasionally to 8 ft subsiding to 3 to 5 ft. 
.saturday night...southeast winds 10 to 15 kt increasing to 10 to
20 kt. chance of showers. waves 2 to 4 ft. 
.sunday...south winds 10 to 20 kt. chance of showers in the
morning, then chance of showers and thunderstorms in the
afternoon. waves 2 to 4 ft. 
.sunday night...south winds 10 to 15 kt becoming southwest.
showers likely. waves 2 to 4 ft. 
.monday...southwest winds 10 to 15 kt becoming south. chance of
showers and thunderstorms. waves 1 to 3 ft. 
.tuesday...south winds 10 to 15 kt backing to east. waves 1 to
3 ft.  

$$

fzus63 kmkx 181939
glflm 
expires:202509190315;;207299

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
239 pm cdt thu sep 18 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...

light to modest northeast winds over the northern half of the 
lake will gradually expand into the southern half of the lake this
afternoon with the passage of a weak backdoor cold front. light 
to modest northeast winds are then expected tonight becoming 
easterly on friday. breezy east to southeast winds will then 
prevail friday night through saturday morning as canadian high 
pressure strengthens to around 30.4 inches as it moves into the
lower great lakes and southern quebec, and as low pressure around
29.9 inches moves from the eastern dakotas into minnesota. 
intermittent showers and thunderstorms are expected friday night 
through sunday.


lmz261-362-364-366-563-565-567-868-190315-
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-
239 pm cdt thu sep 18 2025

sheboygan wi to pentwater mi north...

.tonight...north winds 10 to 15 kt becoming east. waves 1 to
3 ft. 
.friday...east winds 10 to 20 kt becoming northeast. waves 2 to
4 ft. 
.friday night...east winds 15 to 25 kt becoming southeast. waves
4 to 6 ft occasionally to 8 ft. 
.saturday...southeast winds 15 to 25 kt. chance of showers. waves
4 to 6 ft occasionally to 8 ft. 
.saturday night...southeast winds 15 to 25 kt becoming south
10 to 20 kt. chance of showers in the evening, then chance of
showers and thunderstorms overnight. waves 2 to 4 ft. 
.sunday...south winds 10 to 20 kt. chance of showers. waves 2 to
4 ft. 
.sunday night...south winds 10 to 15 kt becoming southwest.
chance of showers. waves 2 to 4 ft. 
.monday...southwest winds 10 to 15 kt. chance of showers. waves
1 to 3 ft. 
.tuesday...northeast winds 10 to 15 kt. waves 1 to 3 ft.  

$$

fzus63 kmqt 182001
glfls 
expires:202509190800;;208096

open lake forecast for lake superior
national weather service marquette mi
401 pm edt thu sep 18 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...

a 30.3 inch high over manitoba shifts over northern ontario through 
friday and strengthens to 30.4 inches on saturday over eastern 
ontario and western quebec. the 30.4 inch high will move to new 
england by sunday morning. this brings 30.2 inch ridging back over 
lake superior late today and friday, weakening to 30.1 inches by the 
end of the day saturday. troughing then begins to spread over lake 
superior sunday into the beginning of next week as low pressure 
deepens over the canadian prairie to around 29.5 inches.



lsz162-190800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt thu sep 18 2025 /301 pm cdt thu sep 18 2025/

.late this afternoon...east winds 15 to 25 knots. a slight chance
of showers. waves 3 to 6 feet occasionally to 8 feet. 
.tonight...east winds 15 to 25 knots. a slight chance of showers
and thunderstorms. waves subsiding to 3 to 5 feet occasionally to
7 feet. 
.friday...east winds 15 to 25 knots increasing to 20 to 30 knots
in the afternoon. a chance of showers and a slight chance of
thunderstorms. waves building to 5 to 8 feet occasionally to
10 feet. 
.friday night...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. 
.saturday...east winds 10 to 20 knots. showers likely and a
slight chance of thunderstorms. waves subsiding to 1 to 3 feet. 
.saturday night...southeast winds 5 to 15 knots veering south
after midnight. a chance of showers. waves subsiding to calm to
2 feet. 
.sunday...south winds 5 to 15 knots. a chance of showers. waves
calm to 2 feet. 
.sunday night...south winds 5 to 15 knots veering west after
midnight. waves calm to 2 feet. 
.monday...east winds 5 to 15 knots backing northeast. waves calm
to 2 feet. 
.tuesday...northeast winds 5 to 15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 182001
glfls 
expires:202509190800;;208097

open lake forecast for lake superior
national weather service marquette mi
401 pm edt thu sep 18 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...

a 30.3 inch high over manitoba shifts over northern ontario through 
friday and strengthens to 30.4 inches on saturday over eastern 
ontario and western quebec. the 30.4 inch high will move to new 
england by sunday morning. this brings 30.2 inch ridging back over 
lake superior late today and friday, weakening to 30.1 inches by the 
end of the day saturday. troughing then begins to spread over lake 
superior sunday into the beginning of next week as low pressure 
deepens over the canadian prairie to around 29.5 inches.



lsz263-190800-
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 18 2025

.late this afternoon...east winds 15 to 25 knots. waves 3 to
6 feet occasionally to 8 feet. 
.tonight...east winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. a slight chance of showers. waves
subsiding to 2 to 4 feet. 
.friday...east winds 15 to 25 knots. a slight chance of showers.
waves building to 3 to 6 feet occasionally to 8 feet. 
.friday night...east winds 15 to 25 knots diminishing to 10 to
20 knots late. a chance of showers and a slight chance of
thunderstorms. waves subsiding to 2 to 4 feet. 
.saturday...southeast winds 10 to 20 knots. 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 becoming south
5 to 15 knots after midnight. a chance of showers. waves
subsiding to 1 to 3 feet. 
.sunday...south winds 5 to 15 knots. a chance of showers. waves
subsiding to calm to 2 feet. 
.sunday night...south winds 5 to 15 knots becoming west less than
10 knots after midnight. waves calm to 2 feet. 
.monday...southwest winds 5 to 15 knots backing northeast. waves
calm to 2 feet. 
.tuesday...northeast winds 5 to 15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 182001
glfls 
expires:202509190800;;208098

open lake forecast for lake superior
national weather service marquette mi
401 pm edt thu sep 18 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...

a 30.3 inch high over manitoba shifts over northern ontario through 
friday and strengthens to 30.4 inches on saturday over eastern 
ontario and western quebec. the 30.4 inch high will move to new 
england by sunday morning. this brings 30.2 inch ridging back over 
lake superior late today and friday, weakening to 30.1 inches by the 
end of the day saturday. troughing then begins to spread over lake 
superior sunday into the beginning of next week as low pressure 
deepens over the canadian prairie to around 29.5 inches.



lsz264-190800-
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 18 2025

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

$$

fzus63 kmqt 182001
glfls 
expires:202509190800;;208099

open lake forecast for lake superior
national weather service marquette mi
401 pm edt thu sep 18 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...

a 30.3 inch high over manitoba shifts over northern ontario through 
friday and strengthens to 30.4 inches on saturday over eastern 
ontario and western quebec. the 30.4 inch high will move to new 
england by sunday morning. this brings 30.2 inch ridging back over 
lake superior late today and friday, weakening to 30.1 inches by the 
end of the day saturday. troughing then begins to spread over lake 
superior sunday into the beginning of next week as low pressure 
deepens over the canadian prairie to around 29.5 inches.



lsz265-190800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
401 pm edt thu sep 18 2025

.late this afternoon...northeast winds 10 to 20 knots. waves 1 to
3 feet subsiding to calm to 2 feet. 
.tonight...northeast winds 10 to 20 knots veering east after
midnight. waves building to 1 to 3 feet. 
.friday...east winds 15 to 25 knots. waves building to 2 to
4 feet. 
.friday night...east winds 15 to 25 knots veering southeast after
midnight. a slight chance of showers and thunderstorms after
midnight. waves 2 to 4 feet. 
.saturday...southeast winds 15 to 25 knots. a slight chance of
thunderstorms through early afternoon. a chance of showers. waves
subsiding to 1 to 3 feet. 
.saturday night...southeast winds 15 to 25 knots becoming south
10 to 20 knots after midnight. a chance of showers. waves
subsiding to calm to 2 feet. 
.sunday...south winds 10 to 20 knots backing southeast by mid
afternoon. a chance of showers. waves calm to 2 feet. 
.sunday night...south winds 5 to 15 knots veering southwest after
midnight. a chance of showers. waves calm to 2 feet. 
.monday...west winds 5 to 15 knots veering northeast. waves calm
to 2 feet. 
.tuesday...northeast winds 5 to 15 knots becoming north 10 to
20 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 182001
glfls 
expires:202509190800;;208100

open lake forecast for lake superior
national weather service marquette mi
401 pm edt thu sep 18 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...

a 30.3 inch high over manitoba shifts over northern ontario through 
friday and strengthens to 30.4 inches on saturday over eastern 
ontario and western quebec. the 30.4 inch high will move to new 
england by sunday morning. this brings 30.2 inch ridging back over 
lake superior late today and friday, weakening to 30.1 inches by the 
end of the day saturday. troughing then begins to spread over lake 
superior sunday into the beginning of next week as low pressure 
deepens over the canadian prairie to around 29.5 inches.



lsz266-190800-
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 18 2025

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

$$

fzus63 kmqt 182001
glfls 
expires:202509190800;;208101

open lake forecast for lake superior
national weather service marquette mi
401 pm edt thu sep 18 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...

a 30.3 inch high over manitoba shifts over northern ontario through 
friday and strengthens to 30.4 inches on saturday over eastern 
ontario and western quebec. the 30.4 inch high will move to new 
england by sunday morning. this brings 30.2 inch ridging back over 
lake superior late today and friday, weakening to 30.1 inches by the 
end of the day saturday. troughing then begins to spread over lake 
superior sunday into the beginning of next week as low pressure 
deepens over the canadian prairie to around 29.5 inches.



lsz267-190800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
401 pm edt thu sep 18 2025

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

$$