fzus61 kbuf 230802
glflo 
expires:202606231500;;760804

open lake forecast for lake ontario
national weather service buffalo ny
402 am edt tue jun 23 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 29.8 inch low will move off the southern new england 
coast today. a 30.1 inch high will then build into the ohio valley 
tonight through wednesday, then drift to the eastern seaboard 
wednesday night through thursday. a weak 29.9 inch low is then 
forecast to move from the central great lakes thursday to southern 
quebec friday, then the canadian maritimes saturday.


loz062-231500-
lake ontario open waters from the niagara river to hamlin beach-
402 am edt tue jun 23 2026

.today...west winds 5 to 10 knots. patchy fog early. patchy
drizzle early. waves 1 foot or less. 
.tonight...west winds 5 to 15 knots becoming northwest. waves
2 feet or less. 
.wednesday...west winds 5 to 10 knots becoming southwest. waves
1 foot or less. 
.wednesday night...southwest winds 10 knots or less becoming
south. waves 1 foot or less. 
.thursday...southeast winds 10 knots or less becoming southwest.
showers with a chance of thunderstorms. waves 1 foot or less. 
.friday...northwest winds less than 10 knots becoming north.
waves 1 foot or less. 
.saturday...northeast winds less than 10 knots becoming
northwest. waves 1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 230802
glflo 
expires:202606231500;;760805

open lake forecast for lake ontario
national weather service buffalo ny
402 am edt tue jun 23 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 29.8 inch low will move off the southern new england 
coast today. a 30.1 inch high will then build into the ohio valley 
tonight through wednesday, then drift to the eastern seaboard 
wednesday night through thursday. a weak 29.9 inch low is then 
forecast to move from the central great lakes thursday to southern 
quebec friday, then the canadian maritimes saturday.


loz063>065-231500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 am edt tue jun 23 2026

.today...northwest winds 5 to 10 knots becoming west. patchy
drizzle early. patchy fog this morning. waves 1 foot or less. 
.tonight...west winds 5 to 15 knots becoming northwest. waves
1 to 2 feet. 
.wednesday...northwest winds 5 to 15 knots becoming west. waves
2 feet or less. 
.wednesday night...west winds 5 to 15 knots becoming south less
than 10 knots. waves 2 feet or less. 
.thursday...south winds 10 knots or less. showers with a chance
of thunderstorms. waves 1 foot or less. 
.friday...southwest winds 10 knots or less becoming west. a
chance of showers during the day. waves 1 foot or less. 
.saturday...north winds 10 knots or less becoming northwest.
waves 1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 230748
glfle 
expires:202606231430;;760442

open lake forecast for lake erie
national weather service cleveland oh
348 am edt tue jun 23 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...
high pressure of 30.20 inches over the upper great lakes will
build south into the region through wednesday. low pressure of 
29.90 inches will move east through the central great lakes on
thursday, pushing a cold front south of lake erie by friday. 
high pressure of 30.10 inches will remain over the central great 
lakes for the first half of the weekend.


lez162>164-231430-
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-
the islands to vermilion oh beyond 5 nm off shoreline to us-
canadian border-
348 am edt tue jun 23 2026

.today...north winds 5 to 15 knots. waves 2 feet or less. 
.tonight...north winds 10 knots or less becoming northeast. waves
1 foot or less. 
.wednesday...light and variable winds becoming east 5 to
10 knots. waves 1 foot or less. 
.wednesday night...east winds 5 to 10 knots becoming southwest.
showers likely overnight. waves 1 foot or less. 
.thursday...southwest winds 5 to 15 knots becoming west. a chance
of showers and thunderstorms during the day, then a chance of
showers thursday night. waves 2 feet or less. 
.friday...north winds 5 to 10 knots becoming northeast. a chance
of showers. waves 1 foot or less. 
.saturday...northeast winds 5 to 10 knots becoming east. a chance
of showers during the day. waves 1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 230748
glfle 
expires:202606231430;;760443

open lake forecast for lake erie
national weather service cleveland oh
348 am edt tue jun 23 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...
high pressure of 30.20 inches over the upper great lakes will
build south into the region through wednesday. low pressure of 
29.90 inches will move east through the central great lakes on
thursday, pushing a cold front south of lake erie by friday. 
high pressure of 30.10 inches will remain over the central great 
lakes for the first half of the weekend.


lez165>167-231430-
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-
348 am edt tue jun 23 2026

.today...north winds 5 to 15 knots becoming northwest. waves 1 to
3 feet this morning, decreasing to around 1 foot this afternoon.
.tonight...northwest winds 5 to 15 knots becoming north. waves
1 foot or less. 
.wednesday...north winds less than 10 knots. waves 1 foot or
less. 
.wednesday night...east winds 10 knots or less becoming south.
showers likely overnight. waves 2 feet or less. 
.thursday...south winds 5 to 15 knots becoming southwest. showers
likely with a chance of thunderstorms during the day, then a
chance of showers thursday night. waves 1 to 2 feet. 
.friday...southwest winds 10 knots or less becoming northeast. a
chance of showers. waves 1 foot or less. 
.saturday...northeast winds 5 to 10 knots becoming east. waves
1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kcle 230748
glfle 
expires:202606231430;;760444

open lake forecast for lake erie
national weather service cleveland oh
348 am edt tue jun 23 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...
high pressure of 30.20 inches over the upper great lakes will
build south into the region through wednesday. low pressure of 
29.90 inches will move east through the central great lakes on
thursday, pushing a cold front south of lake erie by friday. 
high pressure of 30.10 inches will remain over the central great 
lakes for the first half of the weekend.


lez061-168-169-231430-
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-
348 am edt tue jun 23 2026

.today...north winds 5 to 10 knots becoming west. waves 1 foot or
less. 
.tonight...west winds 5 to 15 knots becoming north. waves 2 feet
or less. 
.wednesday...northwest winds less than 10 knots becoming west.
waves 1 foot or less. 
.wednesday night...west winds 10 knots or less becoming south. a
chance of showers overnight. waves 1 foot or less. 
.thursday...south winds 5 to 15 knots becoming southwest. showers
likely with a chance of thunderstorms during the day, then a
chance of showers thursday night. waves 2 feet or less. 
.friday...southwest winds less than 10 knots becoming east. a
chance of showers during the day. waves 1 foot or less. 
.saturday...northeast winds 10 knots or less. waves 1 foot or
less. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 230758
glfsc 
expires:202606231600;;760546

lake st clair forecast
national weather service detroit/pontiac mi
358 am edt tue jun 23 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, 30.20 inches, will build into the great
lakes region, producing light winds today through wednesday. low
pressure, 29.90 inches will move toward lower michigan thursday
bringing a slight increase in winds speeds as they become south
or southwest.


lcz460-231600-
lake st clair-
358 am edt tue jun 23 2026

.today...north winds 10 to 15 knots diminishing to 5 to 10 knots in
the late morning and afternoon. mostly sunny. waves 2 feet or less.
.tonight...northeast winds 5 to 10 knots becoming light and
variable. clear. waves 2 feet or less.
.wednesday...light and variable winds becoming south 5 to 10 knots
in the late morning and afternoon. mostly sunny. waves 2 feet or
less.
.wednesday night...south winds 5 to 10 knots. partly cloudy with a
chance of light showers ...then light showers after midnight. waves
2 feet or less.
.thursday...southwest winds 5 to 10 knots. partly cloudy. light
showers in the morning...then a chance of thunderstorms in the
afternoon. light showers likely in the afternoon and evening. waves
2 feet or less.
.friday...northeast winds 5 to 10 knots. partly cloudy. waves 2 feet
or less.
.saturday...northeast winds 5 to 10 knots. partly cloudy. waves 2
feet or less.

$$

fzus63 kdtx 230757
glflh 
expires:202606231600;;760543

open lake forecast for lake huron
national weather service detroit/pontiac mi
357 am edt tue jun 23 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, 30.20 inches, will build into the great
lakes region, producing light winds today through wednesday. low
pressure, 29.90 inches will move toward lower michigan thursday
bringing a slight increase in winds speeds as they become south
or southwest.


lhz462>464-231600-
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-
357 am edt tue jun 23 2026

.today...north winds 10 to 15 knots decreasing to 5 to 10 knots
late in the afternoon. waves 1 to 3 feet. 
.tonight...northwest winds 5 to 10 knots early in the evening
becoming light and variable. waves 2 feet or less. 
.wednesday...light and variable winds becoming southeast 5 to
10 knots early in the afternoon. waves 2 feet or less. 
.wednesday night...southeast winds 5 to 10 knots. showers. waves
2 feet or less. 
.thursday...southeast winds 5 to 10 knots backing to the north
late in the afternoon. showers in the morning. rain showers
likely late in the morning...then a chance of showers late in the
afternoon. waves 2 feet or less. 
.friday...north winds 5 to 10 knots becoming light and variable.
waves 2 feet or less. 
.saturday...light and variable winds becoming north 5 to
10 knots. waves 2 feet or less. 


$$

fzus63 kdtx 230757
glflh 
expires:202606231600;;760542

open lake forecast for lake huron
national weather service detroit/pontiac mi
357 am edt tue jun 23 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, 30.20 inches, will build into the great
lakes region, producing light winds today through wednesday. low
pressure, 29.90 inches will move toward lower michigan thursday
bringing a slight increase in winds speeds as they become south
or southwest.


lhz362-363-231600-
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-
357 am edt tue jun 23 2026

.today...north winds 5 to 10 knots. waves 1 to 3 feet. 
.tonight...northeast winds 5 to 10 knots backing to the northwest
in the late evening and overnight. waves 2 feet or less. 
.wednesday...light and variable winds becoming southeast 5 to
10 knots early in the afternoon. waves 2 feet or less. 
.wednesday night...southeast winds 5 to 10 knots. a chance of
showers in the evening...then showers after midnight. waves
2 feet or less. 
.thursday...southeast winds 5 to 10 knots becoming light and
variable. a chance of showers. waves 2 feet or less. 
.friday...north winds 5 to 10 knots early in the morning becoming
light and variable. waves 2 feet or less. 
.saturday...light and variable winds. waves 2 feet or less. 


$$

fzus63 kdtx 230757
glflh 
expires:202606231600;;760541

open lake forecast for lake huron
national weather service detroit/pontiac mi
357 am edt tue jun 23 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, 30.20 inches, will build into the great
lakes region, producing light winds today through wednesday. low
pressure, 29.90 inches will move toward lower michigan thursday
bringing a slight increase in winds speeds as they become south
or southwest.


lhz361-231600-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
357 am edt tue jun 23 2026

.today...north winds 5 to 10 knots backing to the west in the
afternoon. waves 2 feet or less. 
.tonight...northwest winds 5 to 10 knots. waves 2 feet or less. 
.wednesday...light and variable winds becoming south 5 to
10 knots early in the afternoon. a chance of showers in the
afternoon. waves 2 feet or less. 
.wednesday night...east winds 5 to 10 knots. showers likely.
waves 2 feet or less. 
.thursday...east winds 5 to 10 knots becoming light and variable.
showers likely in the morning. a chance of showers late in the
morning. waves 2 feet or less. 
.friday...northwest winds 5 to 10 knots early in the morning
becoming light and variable. waves 2 feet or less. 
.saturday...light and variable winds. waves 2 feet or less. 


$$

fzus63 kmkx 230755
glflm 
expires:202606231515;;760519

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
255 am cdt tue jun 23 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 around 30.2 inches over the upper midwest will bring
light and variable winds throughout today and tonight. low 
pressure 29.9 inches developing over the northern plains tonight
and progressing into northern wisconsin on wednesday will bring
southwesterly winds and thunderstorms to the lake. winds shift
northwesterly as low pressure exits into lower michigan on
thursday, with isolated thunderstorms remaining possible. light
northerly winds expected thursday night, continuing through 
friday. friday night into saturday, expect light and variable
winds under high pressure around 30.1 inches, before winds shift
to become southeasterly ahead of developing strong low pressure in
the northern plains.


lmz261-362-364-366-563-565-567-868-231515-
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-
255 am cdt tue jun 23 2026

sheboygan wi to pentwater mi north...

.today...north winds 10 to 15 kt becoming west. waves 1 to 2 ft. 
.tonight...west winds 10 to 15 kt backing to south. slight chance
of showers overnight. waves 1 to 2 ft. 
.wednesday...south winds 10 to 15 kt becoming southeast 10 to
20 kt. chance of showers. waves 1 ft or less building to 2 to
4 ft. 
.wednesday night...south winds 10 to 20 kt diminishing to 10 to
15 kt. chance of showers. waves 2 to 4 ft subsiding to 1 to 3 ft.
.thursday...northwest winds 10 to 15 kt increasing to 10 to
20 kt. waves 1 to 2 ft. 
.thursday night...northwest winds 10 to 15 kt becoming north.
waves 1 to 2 ft. 
.friday...north winds 5 to 10 kt becoming northwest 10 to 20 kt.
waves 1 to 2 ft. 
.saturday...northeast winds 5 to 10 kt increasing to 10 to 20 kt.
waves 1 to 2 ft.  

$$

fzus63 kmkx 230755
glflm 
expires:202606231515;;760520

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
255 am cdt tue jun 23 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 around 30.2 inches over the upper midwest will bring
light and variable winds throughout today and tonight. low 
pressure 29.9 inches developing over the northern plains tonight
and progressing into northern wisconsin on wednesday will bring
southwesterly winds and thunderstorms to the lake. winds shift
northwesterly as low pressure exits into lower michigan on
thursday, with isolated thunderstorms remaining possible. light
northerly winds expected thursday night, continuing through 
friday. friday night into saturday, expect light and variable
winds under high pressure around 30.1 inches, before winds shift
to become southeasterly ahead of developing strong low pressure in
the northern plains.


lmz080-669-671-673-675-777-779-870-872-874-876-878-231515-
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-
255 am cdt tue jun 23 2026

sheboygan wi to pentwater mi south...

.today...north winds 10 to 15 kt increasing to 10 to 20 kt. waves
1 to 3 ft. 
.tonight...north winds 10 to 15 kt diminishing to 5 to 10 kt late
in the evening, then backing to west after midnight becoming
south late. waves 1 to 3 ft subsiding to 1 to 2 ft. 
.wednesday...south winds 10 to 15 kt increasing to 10 to 20 kt.
chance of showers in the morning, then chance of showers and
thunderstorms in the afternoon. waves 1 ft or less building to
2 to 4 ft. 
.wednesday night...south winds 10 to 20 kt becoming southwest
10 to 15 kt. chance of showers and thunderstorms in the evening,
then chance of showers overnight. waves 2 to 4 ft subsiding to
1 to 3 ft. 
.thursday...west winds 10 to 15 kt becoming northwest 10 to
20 kt. waves 1 to 2 ft. 
.thursday night...north winds 10 to 15 kt diminishing to 5 to
10 kt. waves 1 to 2 ft. 
.friday...northeast winds 5 to 10 kt becoming north 10 to 15 kt.
waves 1 to 2 ft. 
.saturday...northeast winds 5 to 10 kt increasing to 10 to 20 kt.
waves 1 to 2 ft.  

$$

fzus63 kmqt 230801
glfls 
expires:202606232000;;760683

open lake forecast for lake superior
national weather service marquette mi
400 am edt tue jun 23 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 30.2 inch high over lake superior this morning remains until this 
evening. tonight through wednesday, expect a 29.9 inch clipper low 
to dig through the northern plains and upper midwest, before moving 
through lower michigan towards the st. lawrence seaway on thursday. 
as the clipper leaves the upper midwest, expect weak 30.0 inch 
ridging to return to lake superior on thursday, building to 30.1 
inches by friday morning and remaining that way into saturday as a 
29.5 inch low begins to lift off of the northern rockies. 




lsz264-232000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
400 am edt tue jun 23 2026

.early this morning...northwest winds 5 to 15 knots. waves calm
to 2 feet. 
.today...northwest winds less than 10 knots backing southwest
late. waves calm to 2 feet. 
.tonight...southeast winds less than 10 knots increasing to 5 to
15 knots late. a slight chance of rain showers after midnight.
waves calm to 2 feet. 
.wednesday...east winds 5 to 15 knots. a chance of rain showers.
waves calm to 2 feet. 
.wednesday night...northeast winds 5 to 15 knots. waves calm to
2 feet. 
.thursday...north winds less than 10 knots backing west by mid
afternoon. waves calm to 2 feet. 
.thursday night...west winds less than 10 knots. waves calm to
2 feet. 
.friday...north winds less than 10 knots veering east. waves calm
to 2 feet. 
.saturday...east winds 5 to 15 knots becoming southeast 10 to
20 knots. a chance of rain showers. waves calm to 2 feet. 

$$

fzus63 kmqt 230801
glfls 
expires:202606232000;;760684

open lake forecast for lake superior
national weather service marquette mi
400 am edt tue jun 23 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 30.2 inch high over lake superior this morning remains until this 
evening. tonight through wednesday, expect a 29.9 inch clipper low 
to dig through the northern plains and upper midwest, before moving 
through lower michigan towards the st. lawrence seaway on thursday. 
as the clipper leaves the upper midwest, expect weak 30.0 inch 
ridging to return to lake superior on thursday, building to 30.1 
inches by friday morning and remaining that way into saturday as a 
29.5 inch low begins to lift off of the northern rockies. 




lsz265-232000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
400 am edt tue jun 23 2026

.early this morning...northwest winds 5 to 15 knots. waves calm
to 2 feet. 
.today...northwest winds 5 to 15 knots veering east in the
afternoon. waves calm to 2 feet. 
.tonight...southeast winds 5 to 15 knots. a slight chance of
showers after midnight. waves calm to 2 feet. 
.wednesday...southeast winds 10 to 20 knots backing east in the
afternoon. a chance of showers. a slight chance of thunderstorms
by mid afternoon. waves calm to 2 feet. 
.wednesday night...east winds 5 to 15 knots backing northeast
after midnight. a chance of showers. waves calm to 2 feet. 
.thursday...north winds 5 to 15 knots. waves calm to 2 feet. 
.thursday night...north winds 5 to 15 knots backing west after
midnight. waves calm to 2 feet. 
.friday...northeast winds 5 to 15 knots veering east. waves calm
to 2 feet. 
.saturday...east winds 5 to 15 knots veering southeast. waves
calm to 2 feet. 

$$

fzus63 kmqt 230801
glfls 
expires:202606232000;;760681

open lake forecast for lake superior
national weather service marquette mi
400 am edt tue jun 23 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 30.2 inch high over lake superior this morning remains until this 
evening. tonight through wednesday, expect a 29.9 inch clipper low 
to dig through the northern plains and upper midwest, before moving 
through lower michigan towards the st. lawrence seaway on thursday. 
as the clipper leaves the upper midwest, expect weak 30.0 inch 
ridging to return to lake superior on thursday, building to 30.1 
inches by friday morning and remaining that way into saturday as a 
29.5 inch low begins to lift off of the northern rockies. 




lsz162-232000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am edt tue jun 23 2026 /300 am cdt tue jun 23 2026/

.early this morning...north winds less than 10 knots. waves calm
to 2 feet. 
.today...north winds less than 10 knots becoming east 5 to
15 knots in the afternoon. waves calm to 2 feet. 
.tonight...east winds 5 to 15 knots backing northeast after
midnight, then increasing to 10 to 20 knots late. a chance of
rain showers through midnight. a slight chance of thunderstorms.
rain showers likely after midnight. waves calm to 2 feet. 
.wednesday...northeast winds 10 to 20 knots. a chance of showers
and a slight chance of thunderstorms. waves building to 1 to
3 feet. 
.wednesday night...northeast winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. a slight chance of rain showers.
waves subsiding to calm to 2 feet. 
.thursday...northeast winds 5 to 15 knots backing north by mid
afternoon. waves calm to 2 feet. 
.thursday night...north winds less than 10 knots. waves calm to
2 feet. 
.friday...northeast winds 5 to 15 knots. waves calm to 2 feet. 
.saturday...northeast winds 10 to 20 knots veering east. a chance
of rain showers. waves building to 1 to 3 feet. 

$$

fzus63 kmqt 230801
glfls 
expires:202606232000;;760686

open lake forecast for lake superior
national weather service marquette mi
400 am edt tue jun 23 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 30.2 inch high over lake superior this morning remains until this 
evening. tonight through wednesday, expect a 29.9 inch clipper low 
to dig through the northern plains and upper midwest, before moving 
through lower michigan towards the st. lawrence seaway on thursday. 
as the clipper leaves the upper midwest, expect weak 30.0 inch 
ridging to return to lake superior on thursday, building to 30.1 
inches by friday morning and remaining that way into saturday as a 
29.5 inch low begins to lift off of the northern rockies. 




lsz267-232000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
400 am edt tue jun 23 2026

.early this morning...northwest winds 5 to 15 knots. waves calm
to 2 feet. 
.today...northwest winds 5 to 15 knots backing west in the
afternoon, then veering northwest late. waves calm to 2 feet. 
.tonight...west winds 5 to 15 knots diminishing to less than
10 knots after midnight, then backing southwest late. waves calm
to 2 feet. 
.wednesday...east winds 5 to 15 knots backing northeast late. a
chance of rain showers by mid afternoon. waves calm to 2 feet. 
.wednesday night...east winds 5 to 15 knots backing northeast
after midnight. a chance of rain showers. waves calm to 2 feet. 
.thursday...north winds 5 to 15 knots backing northwest by mid
afternoon. waves calm to 2 feet. 
.thursday night...northwest winds 5 to 15 knots. waves calm to
2 feet. 
.friday...northwest winds 5 to 15 knots. waves calm to 2 feet. 
.saturday...north winds 5 to 15 knots veering southeast. waves
calm to 2 feet. 

$$

fzus63 kmqt 230801
glfls 
expires:202606232000;;760685

open lake forecast for lake superior
national weather service marquette mi
400 am edt tue jun 23 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 30.2 inch high over lake superior this morning remains until this 
evening. tonight through wednesday, expect a 29.9 inch clipper low 
to dig through the northern plains and upper midwest, before moving 
through lower michigan towards the st. lawrence seaway on thursday. 
as the clipper leaves the upper midwest, expect weak 30.0 inch 
ridging to return to lake superior on thursday, building to 30.1 
inches by friday morning and remaining that way into saturday as a 
29.5 inch low begins to lift off of the northern rockies. 




lsz266-232000-
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 tue jun 23 2026

.early this morning...northwest winds 5 to 15 knots. waves calm
to 2 feet. 
.today...northwest winds 5 to 15 knots. waves calm to 2 feet. 
.tonight...northwest winds 5 to 15 knots backing southeast after
midnight. waves calm to 2 feet. 
.wednesday...southeast winds 5 to 15 knots backing east in the
afternoon. a chance of rain showers. a slight chance of
thunderstorms by mid afternoon. waves calm to 2 feet. 
.wednesday night...east winds 5 to 15 knots backing northeast
after midnight. a chance of rain showers. waves calm to 2 feet. 
.thursday...north winds 5 to 15 knots backing northwest by mid
afternoon. waves calm to 2 feet. 
.thursday night...northwest winds 5 to 15 knots. waves calm to
2 feet. 
.friday...north winds 5 to 15 knots. waves calm to 2 feet. 
.saturday...east winds 5 to 15 knots veering southeast. waves
calm to 2 feet. 

$$

fzus63 kmqt 230801
glfls 
expires:202606232000;;760682

open lake forecast for lake superior
national weather service marquette mi
400 am edt tue jun 23 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 30.2 inch high over lake superior this morning remains until this 
evening. tonight through wednesday, expect a 29.9 inch clipper low 
to dig through the northern plains and upper midwest, before moving 
through lower michigan towards the st. lawrence seaway on thursday. 
as the clipper leaves the upper midwest, expect weak 30.0 inch 
ridging to return to lake superior on thursday, building to 30.1 
inches by friday morning and remaining that way into saturday as a 
29.5 inch low begins to lift off of the northern rockies. 




lsz263-232000-
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 tue jun 23 2026

.early this morning...west winds less than 10 knots. waves calm
to 2 feet. 
.today...south winds less than 10 knots increasing to 5 to
15 knots in the afternoon, then backing northeast late. waves
calm to 2 feet. 
.tonight...east winds 5 to 15 knots. a chance of rain showers and
a slight chance of thunderstorms. waves calm to 2 feet. 
.wednesday...east winds 5 to 15 knots becoming northeast 10 to
20 knots in the afternoon. a chance of showers and a slight
chance of thunderstorms. waves calm to 2 feet. 
.wednesday night...northeast winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. a slight chance of rain showers.
waves calm to 2 feet. 
.thursday...north winds less than 10 knots. waves calm to 2 feet.
.thursday night...west winds less than 10 knots. waves calm to
2 feet. 
.friday...northeast winds 5 to 15 knots veering east. waves calm
to 2 feet. 
.saturday...east winds 10 to 20 knots. a chance of rain showers.
waves building to 1 to 3 feet. 

$$