fzus63 kdtx 181346
glflh 
expires:202610182200;;310359

open lake forecast for lake huron
national weather service detroit/pontiac mi
946 am edt sun oct 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 ridge of high pressure settles across the ohio
valley today. this produces gusty westerly winds through the day
as deep low pressure tracks across northern ontario. the high
pressure then builds northward and stalls over the great lakes
through the middle of the week.


lhz361-182200-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
946 am edt sun oct 18 2026

.rest of today...southwest winds 15 to 20 knots with gusts to
around 30 knots decreasing to 10 to 15 knots late in the
afternoon. waves 3 to 5 feet. 
.tonight...southwest winds 10 to 15 knots increasing to 15 to
20 knots by midnight...then decreasing to 10 to 15 knots early in
the morning. waves 2 to 4 feet. 
.monday...southwest winds 10 to 15 knots becoming west 5 to
10 knots in the late morning and afternoon. waves 1 to 3 feet. 
.monday night...light and variable winds. waves 2 feet or less. 
.tuesday...east winds 5 to 10 knots. waves 2 feet or less. 
.wednesday...south winds 5 to 10 knots early in the morning
becoming light and variable. waves 2 feet or less. 
.thursday...light and variable winds becoming north 5 to 10 knots
in the late morning and early afternoon...then becoming light and
variable . waves 2 feet or less. 


$$

fzus63 kdtx 181346
glflh 
expires:202610182200;;310360

open lake forecast for lake huron
national weather service detroit/pontiac mi
946 am edt sun oct 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 ridge of high pressure settles across the ohio
valley today. this produces gusty westerly winds through the day
as deep low pressure tracks across northern ontario. the high
pressure then builds northward and stalls over the great lakes
through the middle of the week.


lhz362-363-182200-
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-
946 am edt sun oct 18 2026

.rest of today...southwest winds 20 to 25 knots with gusts to
35 knot gales. waves 6 to 9 feet. waves occasionally around
12 feet. 
.tonight...southwest winds 20 to 25 knots with gusts to 35 knot
gales decreasing to 15 to 20 knots with gusts to around 30 knots
after midnight. waves 6 to 9 feet. waves occasionally around
12 feet. 
.monday...southwest winds 10 to 15 knots becoming south 5 to
10 knots early in the afternoon. waves 3 to 5 feet subsiding to
1 to 3 feet early in the afternoon. 
.monday night...light and variable winds. waves 2 feet or less. 
.tuesday...east winds 5 to 10 knots. waves 2 feet or less. 
.wednesday...south winds 5 to 10 knots veering to the southwest
by midnight. waves 2 feet or less. 
.thursday...west winds 5 to 10 knots veering to the north. waves
2 feet or less. 


$$

fzus63 kdtx 181346
glflh 
expires:202610182200;;310361

open lake forecast for lake huron
national weather service detroit/pontiac mi
946 am edt sun oct 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 ridge of high pressure settles across the ohio
valley today. this produces gusty westerly winds through the day
as deep low pressure tracks across northern ontario. the high
pressure then builds northward and stalls over the great lakes
through the middle of the week.


lhz462>464-182200-
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-
946 am edt sun oct 18 2026

.rest of today...southwest winds 15 to 20 knots. waves 3 to
5 feet. 
.tonight...southwest winds 15 to 20 knots decreasing to 10 to
15 knots early in the morning. waves 3 to 5 feet. 
.monday...southwest winds 10 to 15 knots becoming light and
variable. waves 1 to 3 feet. 
.monday night...light and variable winds becoming northeast 5 to
10 knots after midnight. waves 2 feet or less. 
.tuesday...northeast winds 5 to 10 knots in the morning becoming
light and variable...then becoming north 5 to 10 knots late in
the afternoon veering to the east. waves 2 feet or less. 
.wednesday...southeast winds 5 to 10 knots early in the morning
becoming light and variable. waves 2 feet or less. 
.thursday...west winds 5 to 10 knots becoming northeast 10 to
15 knots by midnight. waves 2 feet or less. 


$$

fzus63 kmkx 181359
glflm 
expires:202610182115;;310764

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
859 am cdt sun oct 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...

strong high pressure around 30.6 inches will slowly move east 
through the northeast us today. strong low pressure around 29.2 
inches will move eastward into hudson bay today while deepening 
to around 29.0 inches. southwest gales are expected across the
northern half of lake michigan now into tonight. a gale warning 
is in effect during this period. the southwest gales will diminish
tonight ahead of an approaching high pressure around 30.5 inches.
light and variable winds will develop across lake michigan monday
night through tuesday afternoon. 


lmz080-669-671-673-675-777-779-870-872-874-876-878-182115-
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-
859 am cdt sun oct 18 2026

sheboygan wi to pentwater mi south...

.rest of today...southwest winds to 30 kt becoming south. waves
7 to 10 ft occasionally to 13 ft. 
.tonight...south winds to 30 kt becoming southwest 10 to 20 kt.
waves 7 to 10 ft occasionally to 13 ft subsiding to 4 to 7 ft
occasionally to 9 ft. 
.monday...southwest winds 10 to 20 kt diminishing to 10 to 15 kt
late in the morning, then diminishing to 5 to 10 kt early in the
afternoon becoming south late. waves 4 to 6 ft occasionally to
8 ft subsiding to 1 to 3 ft. 
.monday night...southeast winds 5 to 10 kt becoming east. waves
1 to 2 ft. 
.tuesday...southeast winds 5 to 10 kt. waves 1 ft or less. 
.tuesday night...southeast winds 5 to 10 kt. waves 1 to 2 ft. 
.wednesday...south winds 10 to 15 kt. waves 1 to 2 ft. 
.thursday...east winds 5 to 10 kt increasing to 10 to 15 kt.
waves 1 ft or less.  

$$

fzus63 kmkx 181359
glflm 
expires:202610182115;;310762

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
859 am cdt sun oct 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...

strong high pressure around 30.6 inches will slowly move east 
through the northeast us today. strong low pressure around 29.2 
inches will move eastward into hudson bay today while deepening 
to around 29.0 inches. southwest gales are expected across the
northern half of lake michigan now into tonight. a gale warning 
is in effect during this period. the southwest gales will diminish
tonight ahead of an approaching high pressure around 30.5 inches.
light and variable winds will develop across lake michigan monday
night through tuesday afternoon. 


lmz261-362-364-563-182115-
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 rock island passage to sturgeon bay wi-
859 am cdt sun oct 18 2026

sturgeon bay wi to point betsie mi north...

...gale warning in effect through late tonight...

.rest of today...southwest gales to 35 kt increasing to gales to
40 kt. waves 12 to 16 ft occasionally to 21 ft. 
.tonight...southwest gales to 40 kt becoming west to 30 kt. waves
10 to 14 ft occasionally to 18 ft subsiding to 6 to 9 ft
occasionally to 12 ft. 
.monday...west winds 10 to 20 kt diminishing to 5 to 10 kt late
in the morning, then becoming west 5 to 10 kt early in the
afternoon becoming southwest late. waves 4 to 7 ft occasionally
to 9 ft subsiding to 2 to 4 ft. 
.monday night...northeast winds 5 to 10 kt becoming east. waves
1 to 2 ft. 
.tuesday...southeast winds 10 to 15 kt diminishing to 5 to 10 kt.
waves 1 to 2 ft. 
.tuesday night...southeast winds 5 to 10 kt becoming south. waves
1 to 2 ft. 
.wednesday...south winds 10 to 15 kt becoming southwest 10 to
20 kt. waves 1 to 2 ft. 
.thursday...northeast winds 5 to 10 kt increasing to 10 to 15 kt.
waves 1 ft or less.  

$$

fzus63 kmkx 180826
glflm 
expires:202610181530;;299263

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
326 am cdt sun oct 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...

strong high pressure around 30.6 inches will slowly move east 
through the northeast us today. strong low pressure around 29.2 
inches will move eastward into hudson bay today while deepening 
to around 29.0 inches. this will bring southwest gales to far 
northern portions of lake michigan now into tonight. a gale 
warning is in effect during this period for the northern third of 
lake michigan but we have expanded the gale warning southward a
bit to include the entire north half as wind appear likely to be a
bit more expansive than originally expected. building waves are 
also expected during this period.

high pressure around 30.5 inches will then develop east-northeast
of the region this week, bringing dry conditions and light to 
modest winds.


lmz366-565-567-868-181530-
lake michigan from point betsie to manistee mi 5 nm offshore to
mid lake-
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-
326 am cdt sun oct 18 2026

sturgeon bay wi to point betsie mi south to sheboygan wi to
pentwater mi...

...gale warning in effect from 7 am cdt this morning through this
evening...

.today...southwest gales to 35 kt. waves 8 to 12 ft occasionally
to 16 ft. 
.tonight...southwest gales to 35 kt diminishing to 10 to 20 kt.
waves 8 to 12 ft occasionally to 16 ft subsiding to 7 to 10 ft
occasionally to 13 ft. 
.monday...southwest winds 10 to 20 kt diminishing to 10 to 15 kt
late in the morning, then becoming southwest 10 to 15 kt early in
the afternoon becoming south 5 to 10 kt late. waves 4 to 6 ft
occasionally to 8 ft subsiding to 2 to 4 ft. 
.monday night...south winds 5 to 10 kt diminishing to less than
10 kt. waves 1 to 2 ft. 
.tuesday...southeast winds 5 to 10 kt becoming south. waves
nearly calm. 
.tuesday night...south winds 5 to 10 kt. waves 1 ft or less.
.wednesday...south winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 2 ft. 
.thursday...north winds 5 to 10 kt becoming northeast 10 to
15 kt. waves 1 ft or less.  

$$

fzus63 kmqt 180801
glfls 
expires:202610182000;;297888

open lake forecast for lake superior
national weather service marquette mi
401 am edt sun oct 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...

30.5 inch high pressure will stretch from new england to texas while 
a 29.1 inch low moves into hudson bay today, putting lake superior 
around 30.0 inches between these features. high pressure gradually 
strengthens to 30.6 inches over the canadian maritimes through 
monday as 30.4 inch ridge extends southwest to the tennessee valley. 
meanwhile, 30.2 inch high pressure builds over the northern plains 
sunday night and tracks east across ontario at 30.4 inches on 
monday, strengthening to 30.5 inches over quebec by tuesday. as this 
occurs, ridging over lake superior will strengthen from 30.1 inches 
tonight to 30.4 inches monday night into tuesday. ridging then 
weakens to 30.1 inches over the lake on wednesday as a 29.7 inch 
trough crosses 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-
401 am edt sun oct 18 2026

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

.early this morning...southwest gales to 40 knots. waves 8 to
11 feet occasionally to 14 feet building to 9 to 12 feet
occasionally to 15 feet. 
.today...southwest gales to 40 knots. waves building to 10 to
14 feet occasionally to 18 feet, then subsiding to 7 to 10 feet
occasionally to 13 feet. 
.tonight...southwest winds 20 to 30 knots becoming west 10 to
20 knots after midnight, then becoming northwest 5 to 15 knots
late. waves subsiding to calm to 2 feet. 
.monday...north winds less than 10 knots becoming northeast 5 to
15 knots in the afternoon. waves calm to 2 feet. 
.monday night...east winds 5 to 15 knots. waves calm to 2 feet. 
.tuesday...southeast winds 5 to 15 knots. waves calm to 2 feet. 
.tuesday night...south winds 10 to 20 knots veering southwest
after midnight. waves building to 1 to 3 feet. 
.wednesday...southwest winds 10 to 20 knots becoming northeast
5 to 15 knots. waves subsiding to calm to 2 feet. 
.thursday...east winds 5 to 15 knots veering southeast. waves
calm to 2 feet. 

$$

fzus63 kmqt 180801
glfls 
expires:202610182000;;297890

open lake forecast for lake superior
national weather service marquette mi
401 am edt sun oct 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...

30.5 inch high pressure will stretch from new england to texas while 
a 29.1 inch low moves into hudson bay today, putting lake superior 
around 30.0 inches between these features. high pressure gradually 
strengthens to 30.6 inches over the canadian maritimes through 
monday as 30.4 inch ridge extends southwest to the tennessee valley. 
meanwhile, 30.2 inch high pressure builds over the northern plains 
sunday night and tracks east across ontario at 30.4 inches on 
monday, strengthening to 30.5 inches over quebec by tuesday. as this 
occurs, ridging over lake superior will strengthen from 30.1 inches 
tonight to 30.4 inches monday night into tuesday. ridging then 
weakens to 30.1 inches over the lake on wednesday as a 29.7 inch 
trough crosses hudson bay.




lsz265-182000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
401 am edt sun oct 18 2026

...gale warning in effect from 8 am this morning to 2 pm edt this
afternoon...

.early this morning...southwest winds 20 to 30 knots. waves 3 to
5 feet occasionally to 7 feet. 
.today...southwest gales to 35 knots diminishing to 15 to
25 knots. waves building to 3 to 6 feet occasionally to 8 feet,
then subsiding to 1 to 3 feet. 
.tonight...southwest winds 15 to 25 knots veering west after
midnight, then diminishing to 10 to 20 knots late. waves building
to 2 to 4 feet, then subsiding to calm to 2 feet. 
.monday...northwest winds 5 to 15 knots veering northeast late.
waves calm to 2 feet. 
.monday night...east winds 5 to 15 knots veering southeast after
midnight. waves calm to 2 feet. 
.tuesday...southeast winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. waves calm to 2 feet. 
.tuesday night...south winds 10 to 20 knots. waves calm to
2 feet. 
.wednesday...southwest winds 5 to 15 knots veering north. waves
calm to 2 feet. 
.thursday...east winds 5 to 15 knots becoming southeast 10 to
20 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 180801
glfls 
expires:202610182000;;297891

open lake forecast for lake superior
national weather service marquette mi
401 am edt sun oct 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...

30.5 inch high pressure will stretch from new england to texas while 
a 29.1 inch low moves into hudson bay today, putting lake superior 
around 30.0 inches between these features. high pressure gradually 
strengthens to 30.6 inches over the canadian maritimes through 
monday as 30.4 inch ridge extends southwest to the tennessee valley. 
meanwhile, 30.2 inch high pressure builds over the northern plains 
sunday night and tracks east across ontario at 30.4 inches on 
monday, strengthening to 30.5 inches over quebec by tuesday. as this 
occurs, ridging over lake superior will strengthen from 30.1 inches 
tonight to 30.4 inches monday night into tuesday. ridging then 
weakens to 30.1 inches over the lake on wednesday as a 29.7 inch 
trough crosses 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-
401 am edt sun oct 18 2026

.early this morning...southwest winds 20 to 30 knots. waves 4 to
8 feet occasionally to 10 feet. 
.today...southwest winds 20 to 30 knots increasing to 30 knots
with a few gale force gusts to 35 knots possible in the
afternoon, then diminishing to 20 to 30 knots late. waves
building to 9 to 12 feet occasionally to 15 feet, then subsiding
to 7 to 10 feet occasionally to 13 feet. 
.tonight...southwest winds 15 to 25 knots veering west after
midnight, then diminishing to 10 to 20 knots late. waves
subsiding to 2 to 4 feet. 
.monday...northwest winds 5 to 15 knots veering north in the
afternoon. waves subsiding to calm to 2 feet. 
.monday night...northeast winds 5 to 15 knots veering east after
midnight. waves calm to 2 feet. 
.tuesday...southeast winds 5 to 15 knots. waves calm to 2 feet. 
.tuesday night...south winds 10 to 20 knots increasing to 15 to
25 knots after midnight. waves building to 1 to 3 feet. 
.wednesday...southwest winds 10 to 20 knots becoming north 5 to
15 knots. waves subsiding to calm to 2 feet. 
.thursday...east winds 5 to 15 knots veering southeast. waves
calm to 2 feet. 

$$

fzus63 kmqt 180801
glfls 
expires:202610182000;;297892

open lake forecast for lake superior
national weather service marquette mi
401 am edt sun oct 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...

30.5 inch high pressure will stretch from new england to texas while 
a 29.1 inch low moves into hudson bay today, putting lake superior 
around 30.0 inches between these features. high pressure gradually 
strengthens to 30.6 inches over the canadian maritimes through 
monday as 30.4 inch ridge extends southwest to the tennessee valley. 
meanwhile, 30.2 inch high pressure builds over the northern plains 
sunday night and tracks east across ontario at 30.4 inches on 
monday, strengthening to 30.5 inches over quebec by tuesday. as this 
occurs, ridging over lake superior will strengthen from 30.1 inches 
tonight to 30.4 inches monday night into tuesday. ridging then 
weakens to 30.1 inches over the lake on wednesday as a 29.7 inch 
trough crosses hudson bay.




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

.early this morning...southwest winds to 30 knots with a few gale
force gusts to 35 knots possible. waves 4 to 8 feet occasionally
to 10 feet. 
.today...southwest winds to 30 knots with a few gale force gusts
to 35 knots possible. waves building to 6 to 9 feet occasionally
to 11 feet, then subsiding to 3 to 6 feet occasionally to 8 feet.
.tonight...southwest winds 20 to 30 knots becoming west 10 to
20 knots late. waves subsiding to 2 to 4 feet. 
.monday...west winds 5 to 15 knots veering north in the
afternoon. waves subsiding to calm to 2 feet. 
.monday night...north winds 5 to 15 knots veering east after
midnight. waves calm to 2 feet. 
.tuesday...southeast winds 10 to 20 knots. waves calm to 2 feet. 
.tuesday night...south winds 10 to 20 knots. waves calm to
2 feet. 
.wednesday...southwest winds 5 to 15 knots. waves calm to 2 feet.
.thursday...northeast winds 5 to 15 knots veering southeast.
waves calm to 2 feet. 

$$

fzus63 kmqt 180801
glfls 
expires:202610182000;;297887

open lake forecast for lake superior
national weather service marquette mi
401 am edt sun oct 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...

30.5 inch high pressure will stretch from new england to texas while 
a 29.1 inch low moves into hudson bay today, putting lake superior 
around 30.0 inches between these features. high pressure gradually 
strengthens to 30.6 inches over the canadian maritimes through 
monday as 30.4 inch ridge extends southwest to the tennessee valley. 
meanwhile, 30.2 inch high pressure builds over the northern plains 
sunday night and tracks east across ontario at 30.4 inches on 
monday, strengthening to 30.5 inches over quebec by tuesday. as this 
occurs, ridging over lake superior will strengthen from 30.1 inches 
tonight to 30.4 inches monday night into tuesday. ridging then 
weakens to 30.1 inches over the lake on wednesday as a 29.7 inch 
trough crosses hudson bay.




lsz162-182000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 am edt sun oct 18 2026 /301 am cdt sun oct 18 2026/

...gale warning in effect until 2 pm edt /1 pm cdt/ this
afternoon...

.early this morning...southwest gales to 35 knots. waves 7 to
11 feet occasionally to 13 feet. 
.today...southwest gales to 35 knots. waves building to 9 to
12 feet occasionally to 15 feet, then subsiding to 5 to 8 feet
occasionally to 10 feet. 
.tonight...southwest winds 15 to 25 knots becoming west 5 to
15 knots after midnight, then veering northwest late. waves
subsiding to calm to 2 feet. 
.monday...north winds 5 to 15 knots veering northeast in the
afternoon. waves calm to 2 feet. 
.monday night...east winds 5 to 15 knots. waves calm to 2 feet. 
.tuesday...east winds 5 to 15 knots. waves calm to 2 feet. 
.tuesday night...east winds 5 to 15 knots veering southwest after
midnight. waves calm to 2 feet. 
.wednesday...southwest winds 5 to 15 knots backing northeast.
waves calm to 2 feet. 
.thursday...east winds 5 to 15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 180801
glfls 
expires:202610182000;;297889

open lake forecast for lake superior
national weather service marquette mi
401 am edt sun oct 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...

30.5 inch high pressure will stretch from new england to texas while 
a 29.1 inch low moves into hudson bay today, putting lake superior 
around 30.0 inches between these features. high pressure gradually 
strengthens to 30.6 inches over the canadian maritimes through 
monday as 30.4 inch ridge extends southwest to the tennessee valley. 
meanwhile, 30.2 inch high pressure builds over the northern plains 
sunday night and tracks east across ontario at 30.4 inches on 
monday, strengthening to 30.5 inches over quebec by tuesday. as this 
occurs, ridging over lake superior will strengthen from 30.1 inches 
tonight to 30.4 inches monday night into tuesday. ridging then 
weakens to 30.1 inches over the lake on wednesday as a 29.7 inch 
trough crosses hudson bay.




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

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

.early this morning...southwest gales to 40 knots. waves 7 to
11 feet occasionally to 13 feet. 
.today...southwest gales to 40 knots. waves building to 10 to
14 feet occasionally to 18 feet, then subsiding to 7 to 10 feet
occasionally to 13 feet. 
.tonight...west winds 20 to 30 knots diminishing to 15 to
25 knots after midnight, then becoming northwest 5 to 15 knots
late. waves subsiding to 1 to 3 feet. 
.monday...northwest winds less than 10 knots veering north in the
afternoon, then becoming northeast 5 to 15 knots late. waves
subsiding to calm to 2 feet. 
.monday night...east winds 5 to 15 knots. waves calm to 2 feet. 
.tuesday...southeast winds 5 to 15 knots. waves calm to 2 feet. 
.tuesday night...south winds 5 to 15 knots increasing to 10 to
20 knots after midnight. waves building to 1 to 3 feet. 
.wednesday...southwest winds 5 to 15 knots backing northeast.
waves subsiding to calm to 2 feet. 
.thursday...east winds 5 to 15 knots veering southeast. waves
calm to 2 feet. 

$$