fzus61 kbuf 180802
glflo 
expires:202606181500;;945494

open lake forecast for lake ontario
national weather service buffalo ny
402 am edt thu jun 18 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...an unseasonably strong low over southern ontario this 
morning will track to southern quebec this afternoon, deepening to 
29.1 inches. the trailing cold front will move across the lake 
today. this low will move slowly east to the canadian maritimes 
friday while filling to 29.4 inches, eventually moving east of 
newfoundland by saturday night. a weak ridge of high pressure 
averaging 29.9 inches will then build into the great lakes saturday 
night through sunday. a 29.7 inch low is then forecast to move over 
or just south of the lower great lakes monday before moving off the 
new england coast by tuesday.


loz063>065-181500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 am edt thu jun 18 2026

.today...south winds to 30 knots becoming west. showers with a
chance of thunderstorms this morning, then a chance of showers
this afternoon. waves 5 to 9 feet. waves occasionally around
11 feet. 
.tonight...west winds to 30 knots. waves 6 to 9 feet. waves
occasionally around 11 feet. 
.friday...west winds 20 to 25 knots. waves 6 to 9 feet. waves
occasionally around 11 feet. 
.friday night...west winds 15 to 25 knots. waves 5 to 9 feet
subsiding to 4 to 7 feet. waves occasionally around 11 feet. 
.saturday...west winds 15 to 20 knots diminishing to 5 to
10 knots. waves 4 to 7 feet subsiding to 1 to 3 feet. waves
occasionally around 9 feet. 
.sunday...west winds 10 knots or less becoming south. a chance of
showers sunday night. waves 2 feet or less. 
.monday...east winds 5 to 10 knots becoming northwest. a chance
of showers. waves 1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 180802
glflo 
expires:202606181500;;945493

open lake forecast for lake ontario
national weather service buffalo ny
402 am edt thu jun 18 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...an unseasonably strong low over southern ontario this 
morning will track to southern quebec this afternoon, deepening to 
29.1 inches. the trailing cold front will move across the lake 
today. this low will move slowly east to the canadian maritimes 
friday while filling to 29.4 inches, eventually moving east of 
newfoundland by saturday night. a weak ridge of high pressure 
averaging 29.9 inches will then build into the great lakes saturday 
night through sunday. a 29.7 inch low is then forecast to move over 
or just south of the lower great lakes monday before moving off the 
new england coast by tuesday.


loz062-181500-
lake ontario open waters from the niagara river to hamlin beach-
402 am edt thu jun 18 2026

.today...southwest winds 15 to 25 knots becoming west. showers
early, then a chance of showers. waves 3 to 5 feet building to
5 to 8 feet. waves occasionally around 10 feet. 
.tonight...west winds 15 to 25 knots. waves 5 to 8 feet subsiding
to 3 to 6 feet. waves occasionally around 10 feet. 
.friday...west winds 15 to 25 knots. waves 3 to 6 feet. 
.friday night...west winds 15 to 20 knots. waves 3 to 6 feet
subsiding to 2 to 4 feet. 
.saturday...west winds 15 to 20 knots diminishing to 5 to
15 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.sunday...west winds 10 knots or less becoming east. a chance of
showers sunday night. waves 1 foot or less. 
.monday...northeast winds 5 to 15 knots becoming northwest. a
chance of showers during the day. waves 2 feet or less. 

$$

fzus61 kcle 180744
glfle 
expires:202606181415;;944820

open lake forecast for lake erie
national weather service cleveland oh
344 am edt thu jun 18 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 moves east of the area this morning. a surface 
trough averaging 29.60 inches lingers across the lake through 
saturday with high pressure 30.00 inches building overhead on 
sunday. low pressure 29.80 inches impacts the region for the start
of next week.


lez165>168-181415-
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-
344 am edt thu jun 18 2026

...gale warning in effect through this afternoon...

.today...west gales to 35 knots. a slight chance of showers
early. a slight chance of showers late. waves 8 to 12 feet. waves
occasionally around 15 feet. 
.tonight...west winds 15 to 25 knots diminishing to 10 to
15 knots. waves 6 to 9 feet subsiding to 2 to 4 feet. waves
occasionally around 11 feet. 
.friday...west winds 10 to 15 knots. waves 2 to 4 feet. 
.friday night...west winds 10 to 15 knots becoming northwest.
waves 1 to 3 feet. 
.saturday...west winds 5 to 10 knots becoming northwest. waves
1 to 3 feet. 
.sunday...north winds less than 10 knots becoming northeast and
increasing to 15 to 20 knots. a chance of showers during the day,
then showers likely sunday night. waves 1 to 3 feet. 
.monday...northeast winds 15 to 20 knots becoming north 10 to
15 knots. a chance of showers during the day. waves 3 to 5 feet
subsiding to 1 to 3 feet. 

$$

fzus61 kcle 180744
glfle 
expires:202606181415;;944819

open lake forecast for lake erie
national weather service cleveland oh
344 am edt thu jun 18 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 moves east of the area this morning. a surface 
trough averaging 29.60 inches lingers across the lake through 
saturday with high pressure 30.00 inches building overhead on 
sunday. low pressure 29.80 inches impacts the region for the start
of next week.


lez162>164-181415-
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-
344 am edt thu jun 18 2026

...low water advisory in effect until 4 pm edt this afternoon...

.today...west winds to 30 knots. waves 5 to 8 feet. waves
occasionally around 10 feet. 
.tonight...west winds 15 to 20 knots diminishing to 10 to
15 knots. waves 3 to 5 feet subsiding to 1 to 3 feet. 
.friday...west winds 10 to 15 knots increasing to 15 to 20 knots.
waves 1 to 3 feet. 
.friday night...west winds 10 to 15 knots. waves 1 to 3 feet. 
.saturday...west winds 5 to 10 knots becoming northwest. waves
2 feet or less. 
.sunday...north winds 10 knots or less becoming northeast and
increasing to 15 to 20 knots. a chance of showers during the day,
then showers likely sunday night. waves 2 feet or less building
to 2 to 4 feet. 
.monday...northeast winds 15 to 20 knots becoming north 10 to
15 knots. a chance of showers during the day. waves 3 to 5 feet
subsiding to 1 to 3 feet. 

$$

fzus61 kcle 180744
glfle 
expires:202606181415;;944821

open lake forecast for lake erie
national weather service cleveland oh
344 am edt thu jun 18 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 moves east of the area this morning. a surface 
trough averaging 29.60 inches lingers across the lake through 
saturday with high pressure 30.00 inches building overhead on 
sunday. low pressure 29.80 inches impacts the region for the start
of next week.


lez061-169-181415-
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-
344 am edt thu jun 18 2026

...gale warning in effect through this afternoon...

.today...southwest winds to 30 knots becoming west gales to 35 
knots.. a chance of showers with a slight chance of thunderstorms 
early, then a slight chance of showers and thunderstorms from late
morning on. waves 7 to 10 feet building to 9 to 13 feet. waves 
occasionally around 16 feet. 
.tonight...west winds 15 to 25 knots diminishing to 10 to
15 knots. a slight chance of showers and thunderstorms early,
then a slight chance of showers late in the evening. waves 7 to
10 feet subsiding to 3 to 5 feet. waves occasionally around
13 feet. 
.friday...west winds 10 to 15 knots increasing to 15 to 20 knots.
waves 2 to 4 feet. 
.friday night...west winds 15 to 20 knots becoming northwest and
diminishing to around 10 knots. waves 2 to 4 feet subsiding to
1 to 2 feet. 
.saturday...west winds 5 to 15 knots diminishing to less than
10 knots. waves 1 to 2 feet. 
.sunday...northwest winds 10 knots or less becoming east. a
chance of showers sunday night. waves 1 foot or less. 
.monday...northeast winds 5 to 15 knots becoming north. a chance
of showers during the day. waves 2 feet or less. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 180752
glflh 
expires:202606181600;;945093

open lake forecast for lake huron
national weather service detroit/pontiac mi
352 am edt thu jun 18 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...a very strong low pressure system, 29.20 inches, will
depart from lake huron into quebec today. this will re-orient
winds from the west-northwest for all locations by the afternoon.
breezy conditions will persist through the day in the wake of
this low pressure system.


lhz361-181600-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
352 am edt thu jun 18 2026

.today...north winds 10 to 15 knots backing to the northwest
early in the afternoon...then becoming west 15 to 20 knots late
in the afternoon. showers likely in the morning. patchy fog in
the morning. waves 3 to 5 feet. 
.tonight...west winds 15 to 20 knots decreasing to 10 to 15 knots
in the late evening and overnight. waves 2 to 4 feet. 
.friday...west winds 10 to 15 knots increasing to 15 to 20 knots
early in the afternoon. waves 2 to 4 feet. 
.friday night...west winds 10 to 15 knots becoming northwest 5 to
10 knots in the late evening and overnight. waves 2 to 4 feet
subsiding to 1 to 3 feet after midnight. 
.saturday...west winds 5 to 10 knots. waves 2 feet or less. 
.sunday...northwest winds 5 to 10 knots. waves 2 feet or less. 
.monday...northwest winds 5 to 10 knots increasing to 10 to
15 knots . waves 1 to 3 feet. 


$$

fzus63 kdtx 180752
glflh 
expires:202606181600;;945094

open lake forecast for lake huron
national weather service detroit/pontiac mi
352 am edt thu jun 18 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...a very strong low pressure system, 29.20 inches, will
depart from lake huron into quebec today. this will re-orient
winds from the west-northwest for all locations by the afternoon.
breezy conditions will persist through the day in the wake of
this low pressure system.


lhz362-363-181600-
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-
352 am edt thu jun 18 2026

.today...north winds 10 to 15 knots backing to the west in the
afternoon. a chance of showers in the morning. waves 4 to 6 feet.
waves occasionally around 8 feet. 
.tonight...west winds 10 to 15 knots. waves 3 to 5 feet. 
.friday...west winds 10 to 15 knots. waves 3 to 5 feet. 
.friday night...northwest winds 10 to 15 knots decreasing to 5 to
10 knots in the late evening and overnight. waves 3 to 5 feet. 
.saturday...west winds 5 to 10 knots in the morning becoming
light and variable...then becoming northwest 5 to 10 knots late
in the evening. waves 1 to 3 feet. 
.sunday...northwest winds 5 to 10 knots early in the morning
becoming light and variable...then becoming northeast 5 to
10 knots by midnight. waves 2 feet or less. 
.monday...north winds 5 to 10 knots increasing to 10 to 15 knots.
waves 1 to 3 feet. 


$$

fzus63 kdtx 180752
glflh 
expires:202606181600;;945095

open lake forecast for lake huron
national weather service detroit/pontiac mi
352 am edt thu jun 18 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...a very strong low pressure system, 29.20 inches, will
depart from lake huron into quebec today. this will re-orient
winds from the west-northwest for all locations by the afternoon.
breezy conditions will persist through the day in the wake of
this low pressure system.


lhz462>464-181600-
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-
352 am edt thu jun 18 2026

.today...west winds 15 to 20 knots decreasing to 10 to 15 knots
late in the afternoon. waves 3 to 5 feet. 
.tonight...west winds 10 to 15 knots. waves 2 to 4 feet subsiding
to 1 to 3 feet early in the morning. 
.friday...west winds 10 to 15 knots decreasing to 5 to 10 knots
in the late morning and afternoon. waves 1 to 3 feet. 
.friday night...light and variable winds becoming west 5 to
10 knots after midnight. waves 2 feet or less. 
.saturday...west winds 5 to 10 knots in the morning becoming
light and variable. waves 2 feet or less. 
.sunday...light and variable winds becoming northeast 5 to
10 knots . waves 2 feet or less. 
.monday...north winds 10 to 15 knots. waves 2 to 4 feet. 


$$

fzus63 kdtx 180752
glfsc 
expires:202606181600;;945098

lake st clair forecast
national weather service detroit/pontiac mi
352 am edt thu jun 18 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...a very strong low pressure system, 29.20 inches, will
depart from lake huron into quebec today. this will re-orient
winds from the west-northwest for all locations by the afternoon.
breezy conditions will persist through the day in the wake of
this low pressure system.


lcz460-181600-
lake st clair-
352 am edt thu jun 18 2026

...small craft advisory in effect through this evening...

.today...west winds 20 to 25 knots with gusts to 30 knots. partly
sunny. waves 2 to 4 feet.
.tonight...west winds 15 to 20 knots diminishing to 10 to 15 knots
in the late evening and overnight. mostly clear. waves 1 to 3 feet.
.friday...west winds 5 to 10 knots increasing to 10 to 15 knots in
the late morning and afternoon. sunny. waves 2 feet or less.
.friday night...northwest winds 10 to 15 knots diminishing to 5 to
10 knots after midnight. mostly clear. waves 2 feet or less.
.saturday...west winds 5 to 10 knots. mostly sunny in the
morning...then mostly clear with a chance of light showers in the
afternoon and evening. waves 2 feet or less.
.sunday...east winds 10 to 15 knots. partly cloudy. a chance of
showers. waves 2 feet or less.
.monday...northeast winds 15 to 20 knots. partly cloudy. a chance of
showers. waves 1 to 3 feet.

$$

fzus63 kmkx 180745
glflm 
expires:202606181515;;944893

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
245 am cdt thu jun 18 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...

as low pressure of 29.3 exits eastward into michigan early this 
morning, expect winds to shift to northwesterly and diminish 
gradually today. winds remain light and northwesterly through friday
as high pressure around 30.0 inches progresses southeastward into
the lower mississippi valley. winds may briefly turn 
southwesterly friday night as weak low pressure moves through the 
region, but high pressure will rapidly regain dominance by 
saturday, keeping winds light and variable. stronger low pressure 
will approach from the central plains on sunday, bringing more 
widespread rain and thunderstorms and turning winds to 
northeasterly. northeast winds will continue into early next week.


lmz261-362-364-366-563-565-567-868-181515-
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-
245 am cdt thu jun 18 2026

sheboygan wi to pentwater mi north...

.today...northwest winds 15 to 25 kt backing to southwest 10 to
20 kt. chance of showers this morning. waves 3 to 5 ft subsiding
to 1 to 3 ft. 
.tonight...southwest winds 10 to 20 kt becoming northwest.
isolated showers in the evening. waves 1 to 3 ft. 
.friday...northwest winds 10 to 20 kt becoming southwest. waves
1 to 3 ft. 
.friday night...southwest winds 10 to 20 kt diminishing to 5 to
10 kt overnight. chance of showers overnight. waves 1 to 3 ft. 
.saturday...west winds 10 to 15 kt becoming southwest 10 to
20 kt. waves 1 to 2 ft. 
.saturday night...west winds 10 to 15 kt veering to northeast.
waves 1 to 2 ft. 
.sunday...north winds 5 to 10 kt increasing to 10 to 20 kt. waves
1 ft or less building to 1 to 2 ft. 
.monday...north winds 15 to 25 kt increasing to 30 kt. waves 3 to
5 ft.  

$$

fzus63 kmkx 180745
glflm 
expires:202606181515;;944894

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
245 am cdt thu jun 18 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...

as low pressure of 29.3 exits eastward into michigan early this 
morning, expect winds to shift to northwesterly and diminish 
gradually today. winds remain light and northwesterly through friday
as high pressure around 30.0 inches progresses southeastward into
the lower mississippi valley. winds may briefly turn 
southwesterly friday night as weak low pressure moves through the 
region, but high pressure will rapidly regain dominance by 
saturday, keeping winds light and variable. stronger low pressure 
will approach from the central plains on sunday, bringing more 
widespread rain and thunderstorms and turning winds to 
northeasterly. northeast winds will continue into early next week.


lmz080-669-671-673-675-777-779-870-872-874-876-878-181515-
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-
245 am cdt thu jun 18 2026

sheboygan wi to pentwater mi south...

.today...northwest winds to 30 kt becoming west 10 to 20 kt early
this afternoon, then becoming southwest late. waves 5 to 8 ft
occasionally to 10 ft subsiding to 3 to 5 ft. 
.tonight...southwest winds 10 to 15 kt becoming northwest 10 to
20 kt. waves 2 to 4 ft. 
.friday...northwest winds 10 to 20 kt becoming southwest 10 to
15 kt. waves 2 to 4 ft. 
.friday night...south winds 10 to 15 kt becoming southwest.
chance of showers. waves 1 to 2 ft. 
.saturday...west winds 10 to 15 kt. waves 1 to 3 ft. 
.saturday night...south winds 5 to 10 kt backing to northeast.
waves 1 to 2 ft. 
.sunday...northeast winds 10 to 15 kt increasing to 15 to 25 kt.
chance of showers. waves 1 to 2 ft building to 2 to 4 ft. 
.monday...north winds to 30 kt. waves 5 to 8 ft occasionally to
10 ft.  

$$

fzus63 kmqt 180801
glfls 
expires:202606182000;;945335

open lake forecast for lake superior
national weather service marquette mi
400 am edt thu jun 18 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... 

29.2 inch low pressure currently over central lower michigan tracks 
into southern quebec by this afternoon. this low slowly fills on 
friday while a 30.0 inch high builds over the upper mississippi 
valley, persisting into saturday. moving into early next week, a 
30.0 inch high pressure over northern canada drops  south over lake 
superior on sunday, increasing to 30.2 inches by monday as the 
parent high strengthens to 30.3 inches as it moves into western 
hudson bay.




lsz162-182000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am edt thu jun 18 2026 /300 am cdt thu jun 18 2026/

.early this morning...west winds 5 to 15 knots. waves calm to
2 feet. 
.today...west winds 10 to 20 knots. a slight chance of showers
and thunderstorms by mid afternoon. waves calm to 2 feet. 
.tonight...west winds 10 to 20 knots diminishing to 5 to 15 knots
late. waves calm to 2 feet. 
.friday...west winds 5 to 15 knots backing southwest in the
afternoon. a slight chance of showers by mid afternoon. waves
calm to 2 feet. 
.friday night...southwest winds 5 to 15 knots veering west after
midnight. a chance of rain showers. waves calm to 2 feet. 
.saturday...west winds 5 to 15 knots. waves calm to 2 feet. 
.saturday night...northwest winds 5 to 15 knots becoming north
less than 10 knots after midnight. waves calm to 2 feet. 
.sunday...east winds 5 to 15 knots becoming north less than
10 knots. waves calm to 2 feet. 
.monday...north winds less than 10 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 180801
glfls 
expires:202606182000;;945336

open lake forecast for lake superior
national weather service marquette mi
400 am edt thu jun 18 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... 

29.2 inch low pressure currently over central lower michigan tracks 
into southern quebec by this afternoon. this low slowly fills on 
friday while a 30.0 inch high builds over the upper mississippi 
valley, persisting into saturday. moving into early next week, a 
30.0 inch high pressure over northern canada drops  south over lake 
superior on sunday, increasing to 30.2 inches by monday as the 
parent high strengthens to 30.3 inches as it moves into western 
hudson bay.




lsz263-182000-
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 thu jun 18 2026

.early this morning...west winds 5 to 15 knots. waves calm to
2 feet. 
.today...west winds 5 to 15 knots increasing to 10 to 20 knots in
the afternoon. a slight chance of showers and thunderstorms by
mid afternoon. waves building to 1 to 3 feet. 
.tonight...west winds 10 to 20 knots becoming northwest 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.friday...west winds 5 to 15 knots becoming southwest 10 to
20 knots in the afternoon. waves building to 1 to 3 feet. 
.friday night...southwest winds 5 to 15 knots veering west after
midnight. a slight chance of rain showers. waves subsiding to
calm to 2 feet. 
.saturday...west winds 5 to 15 knots. waves calm to 2 feet. 
.saturday night...west winds 5 to 15 knots becoming northwest
less than 10 knots after midnight. waves calm to 2 feet. 
.sunday...north winds less than 10 knots increasing to 5 to
15 knots. waves calm to 2 feet. 
.monday...north winds 5 to 15 knots backing west. waves calm to
2 feet. 

$$

fzus63 kmqt 180801
glfls 
expires:202606182000;;945337

open lake forecast for lake superior
national weather service marquette mi
400 am edt thu jun 18 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... 

29.2 inch low pressure currently over central lower michigan tracks 
into southern quebec by this afternoon. this low slowly fills on 
friday while a 30.0 inch high builds over the upper mississippi 
valley, persisting into saturday. moving into early next week, a 
30.0 inch high pressure over northern canada drops  south over lake 
superior on sunday, increasing to 30.2 inches by monday as the 
parent high strengthens to 30.3 inches as it moves into western 
hudson bay.




lsz264-182000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
400 am edt thu jun 18 2026

.early this morning...northwest winds 5 to 15 knots. waves calm
to 2 feet. 
.today...west winds 10 to 20 knots. a slight chance of showers by
mid afternoon. waves building to 1 to 3 feet. 
.tonight...west winds 5 to 15 knots veering northwest after
midnight. a slight chance of showers through midnight. waves 1 to
3 feet. 
.friday...northwest winds 5 to 15 knots backing southwest late.
waves subsiding to calm to 2 feet. 
.friday night...southwest winds 5 to 15 knots veering west after
midnight. a slight chance of showers after midnight. waves calm
to 2 feet. 
.saturday...west winds 5 to 15 knots. waves calm to 2 feet. 
.saturday night...west winds 5 to 15 knots becoming northwest
less than 10 knots after midnight. waves calm to 2 feet. 
.sunday...northwest winds less than 10 knots increasing to 5 to
15 knots. waves calm to 2 feet. 
.monday...west winds 5 to 15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 180801
glfls 
expires:202606182000;;945338

open lake forecast for lake superior
national weather service marquette mi
400 am edt thu jun 18 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... 

29.2 inch low pressure currently over central lower michigan tracks 
into southern quebec by this afternoon. this low slowly fills on 
friday while a 30.0 inch high builds over the upper mississippi 
valley, persisting into saturday. moving into early next week, a 
30.0 inch high pressure over northern canada drops  south over lake 
superior on sunday, increasing to 30.2 inches by monday as the 
parent high strengthens to 30.3 inches as it moves into western 
hudson bay.




lsz265-182000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
400 am edt thu jun 18 2026

.early this morning...northwest winds 10 to 20 knots. a slight
chance of showers. waves calm to 2 feet. 
.today...west winds 15 to 25 knots. waves building to 2 to
4 feet, then subsiding to 1 to 3 feet. 
.tonight...west winds 15 to 25 knots. waves subsiding to calm to
2 feet. 
.friday...west winds 15 to 25 knots diminishing to 10 to 20 knots
in the afternoon. waves calm to 2 feet. 
.friday night...west winds 5 to 15 knots. a slight chance of
showers after midnight. waves calm to 2 feet. 
.saturday...west winds 5 to 15 knots veering northwest by mid
afternoon. waves calm to 2 feet. 
.saturday night...west winds 5 to 15 knots. waves calm to 2 feet.
.sunday...north winds 5 to 15 knots backing northwest. waves calm
to 2 feet. 
.monday...north winds 5 to 15 knots backing west. waves calm to
2 feet. 

$$

fzus63 kmqt 180801
glfls 
expires:202606182000;;945339

open lake forecast for lake superior
national weather service marquette mi
400 am edt thu jun 18 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... 

29.2 inch low pressure currently over central lower michigan tracks 
into southern quebec by this afternoon. this low slowly fills on 
friday while a 30.0 inch high builds over the upper mississippi 
valley, persisting into saturday. moving into early next week, a 
30.0 inch high pressure over northern canada drops  south over lake 
superior on sunday, increasing to 30.2 inches by monday as the 
parent high strengthens to 30.3 inches as it moves into western 
hudson bay.




lsz266-182000-
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 thu jun 18 2026

.early this morning...northwest winds 15 to 25 knots. a slight
chance of rain showers. waves calm to 2 feet building to 1 to
3 feet. 
.today...northwest winds 15 to 25 knots backing west late. a
slight chance of rain showers through early afternoon. waves
building to 3 to 5 feet occasionally to 7 feet, then subsiding to
2 to 4 feet. 
.tonight...west winds 15 to 25 knots veering northwest late.
waves subsiding to 1 to 3 feet, then building to 2 to 4 feet. 
.friday...northwest winds 15 to 25 knots becoming west 10 to
20 knots in the afternoon, then diminishing to 5 to 15 knots
late. waves subsiding to 1 to 3 feet. 
.friday night...west winds 5 to 15 knots. waves subsiding to calm
to 2 feet. 
.saturday...west winds 5 to 15 knots veering northwest by mid
afternoon. waves calm to 2 feet. 
.saturday night...west winds 5 to 15 knots veering northwest
after midnight. waves calm to 2 feet. 
.sunday...northwest winds 5 to 15 knots. waves calm to 2 feet. 
.monday...northwest winds 10 to 20 knots diminishing to 5 to
15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 180801
glfls 
expires:202606182000;;945340

open lake forecast for lake superior
national weather service marquette mi
400 am edt thu jun 18 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... 

29.2 inch low pressure currently over central lower michigan tracks 
into southern quebec by this afternoon. this low slowly fills on 
friday while a 30.0 inch high builds over the upper mississippi 
valley, persisting into saturday. moving into early next week, a 
30.0 inch high pressure over northern canada drops  south over lake 
superior on sunday, increasing to 30.2 inches by monday as the 
parent high strengthens to 30.3 inches as it moves into western 
hudson bay.




lsz267-182000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
400 am edt thu jun 18 2026

.early this morning...north winds 10 to 20 knots. a chance of
rain showers. waves calm to 2 feet. 
.today...northwest winds 10 to 20 knots becoming west 15 to
25 knots in the afternoon. a slight chance of rain showers
through early afternoon. waves building to 3 to 5 feet
occasionally to 7 feet. 
.tonight...west winds 10 to 20 knots. waves subsiding to 1 to
3 feet, then building to 2 to 4 feet. 
.friday...west winds 10 to 20 knots increasing to 15 to 25 knots
in the afternoon, then diminishing to 10 to 20 knots late. waves
2 to 4 feet. 
.friday night...west winds 5 to 15 knots. waves subsiding to calm
to 2 feet. 
.saturday...west winds 5 to 15 knots veering northwest by mid
afternoon. waves calm to 2 feet. 
.saturday night...northwest winds 5 to 15 knots. waves calm to
2 feet. 
.sunday...northwest winds 5 to 15 knots increasing to 10 to
20 knots. waves calm to 2 feet. 
.monday...northwest winds 10 to 20 knots diminishing to 5 to
15 knots. waves calm to 2 feet. 

$$