fzus63 kdtx 190756
glflh 
expires:202510191600;;386225

open lake forecast for lake huron
national weather service detroit/pontiac mi
356 am edt sun oct 19 2025

for waters beyond five nautical miles off shore on lake huron

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

.synopsis...low pressure, 29.20 inches, rapidly develops along a
cold front over the mid-mississippi and moves over lower michigan
sunday, bringing the chance for southerly gales sunday morning
across central and southern lake huron with higher probabilities
for northwesterly gales over most of lake huron by late sunday
afternoon. elsewhere, near gale gusts can be expected. high
pressure builds in briefly on monday before another low pressure
moves through the region on tuesday bringing another chance at
gales.


lhz361-191600-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
356 am edt sun oct 19 2025

...gale warning in effect from 2 pm edt this afternoon through
late tonight...

.today...north winds 5 to 10 knots becoming northwest 15 to
20 knots late in the morning...then increasing to 20 to 25 knots
with gusts to around 30 knots early in the afternoon increasing
to 30 knots with gusts to 35 knot gales late in the afternoon.
showers. waves 1 to 3 feet building to 8 to 12 feet. waves
occasionally around 15 feet. 
.tonight...northwest winds to 30 knots with gusts to 35 knot
gales decreasing to 15 to 20 knots. a chance of showers in the
evening. waves 8 to 12 feet. waves occasionally around 15 feet. 
.monday...west winds 10 to 15 knots decreasing to 5 to 10 knots
early in the afternoon. waves 4 to 6 feet subsiding to 2 to
4 feet early in the afternoon. waves occasionally around 8 feet. 
.monday night...southeast winds 5 to 10 knots increasing to 15 to
20 knots. showers likely after midnight. waves 1 to 3 feet
building to 3 to 5 feet after midnight. 
.tuesday...south winds 15 to 20 knots veering to the southwest
late in the afternoon...then decreasing to 10 to 15 knots late in
the evening. showers likely in the morning...then showers. a
chance of waterspouts late in the evening. waves 5 to 7 feet.
waves occasionally around 10 feet. 
.wednesday...west winds 15 to 20 knots with gusts to around
30 knots becoming northwest 20 to 25 knots with gusts to 35 knot
gales early in the evening...then decreasing to 15 to 20 knots
with gusts to around 30 knots in the late evening and early
morning. showers. waves 4 to 6 feet. 
.thursday...northwest winds 15 to 20 knots with gusts to around
30 knots decreasing to 10 to 15 knots in the late evening and
early morning. showers likely. waves 3 to 5 feet. waves
occasionally around 8 feet. 


$$

fzus63 kdtx 190756
glflh 
expires:202510191600;;386226

open lake forecast for lake huron
national weather service detroit/pontiac mi
356 am edt sun oct 19 2025

for waters beyond five nautical miles off shore on lake huron

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

.synopsis...low pressure, 29.20 inches, rapidly develops along a
cold front over the mid-mississippi and moves over lower michigan
sunday, bringing the chance for southerly gales sunday morning
across central and southern lake huron with higher probabilities
for northwesterly gales over most of lake huron by late sunday
afternoon. elsewhere, near gale gusts can be expected. high
pressure builds in briefly on monday before another low pressure
moves through the region on tuesday bringing another chance at
gales.


lhz362-191600-
lake huron from presque isle light to sturgeon point mi beyond
5nm off shore-
356 am edt sun oct 19 2025

...gale warning in effect from 2 pm edt this afternoon through
late tonight...

.today...south winds 10 to 15 knots becoming northwest 20 to
25 knots with gusts to around 30 knots early in the afternoon...
then increasing to 30 knots with gusts to 35 knot gales late in
the afternoon. showers. waves 4 to 6 feet building to 8 to
12 feet in the late morning and afternoon. waves occasionally
around 15 feet. 
.tonight...northwest winds to 30 knots decreasing to 20 to
25 knots after midnight. gusts to 35 knot gales. a chance of
showers in the evening. waves 12 to 16 feet. waves occasionally
around 20 feet. 
.monday...northwest winds 15 to 20 knots becoming west 5 to
10 knots. waves 8 to 12 feet subsiding to 4 to 6 feet early in
the afternoon. waves occasionally around 15 feet. 
.monday night...southwest winds 5 to 10 knots becoming south
15 to 20 knots. a chance of showers after midnight. waves 2 to
4 feet subsiding to 1 to 3 feet in the late evening and early
morning...then building to 4 to 6 feet after midnight. waves
occasionally around 8 feet. 
.tuesday...south winds 15 to 20 knots increasing to 20 to
25 knots late in the morning...then becoming southwest 15 to
20 knots late in the afternoon. showers. a chance of waterspouts
late in the afternoon. waves 8 to 12 feet. waves occasionally
around 15 feet. 
.wednesday...southwest winds 15 to 20 knots becoming west 20 to
25 knots with gusts to around 30 knots. a chance of waterspouts
early in the morning. showers. waves 6 to 9 feet. waves
occasionally around 12 feet. 
.thursday...northwest winds 20 to 25 knots with gusts to around
30 knots decreasing to 15 to 20 knots in the late evening and
early morning. showers likely...then a chance of showers in the
late evening and early morning. waves 5 to 7 feet. waves
occasionally around 10 feet. 


$$

fzus63 kdtx 190756
glflh 
expires:202510191600;;386227

open lake forecast for lake huron
national weather service detroit/pontiac mi
356 am edt sun oct 19 2025

for waters beyond five nautical miles off shore on lake huron

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

.synopsis...low pressure, 29.20 inches, rapidly develops along a
cold front over the mid-mississippi and moves over lower michigan
sunday, bringing the chance for southerly gales sunday morning
across central and southern lake huron with higher probabilities
for northwesterly gales over most of lake huron by late sunday
afternoon. elsewhere, near gale gusts can be expected. high
pressure builds in briefly on monday before another low pressure
moves through the region on tuesday bringing another chance at
gales.


lhz363-462-463-191600-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
lake huron from port austin to harbor beach beyond 5nm off shore-
lake huron from harbor beach to port sanilac beyond 5nm off shore-
356 am edt sun oct 19 2025

...gale warning in effect from 8 am edt this morning through late
tonight...

.today...south winds 15 to 20 knots with gusts to 35 knot gales
becoming northwest 20 to 25 knots with gusts to 35 knot gales
late in the afternoon. showers. waves 6 to 9 feet building to
10 to 14 feet in the afternoon. waves occasionally around
18 feet. 
.tonight...northwest winds to 30 knots decreasing to 20 to
25 knots after midnight. gusts to 35 knot gales. a chance of
showers in the evening. waves 12 to 16 feet. waves occasionally
around 20 feet. 
.monday...northwest winds 15 to 20 knots becoming west 10 to
15 knots in the late morning and afternoon. waves 8 to 12 feet
subsiding to 5 to 7 feet early in the afternoon. waves
occasionally around 15 feet. 
.monday night...southwest winds 5 to 10 knots becoming south
15 to 20 knots. a chance of showers after midnight. waves 2 to
4 feet building to 4 to 6 feet after midnight. waves occasionally
around 8 feet. 
.tuesday...south winds 20 to 25 knots with gusts to around
30 knots veering to the southwest with gusts to around 30 knots
late in the afternoon. showers...then showers likely late in the
afternoon. rain showers late in the evening. a chance of
waterspouts late in the afternoon. waves 8 to 12 feet. waves
occasionally around 15 feet. 
.wednesday...west winds 20 to 25 knots increasing to 30 knots
early in the evening...then decreasing to 20 to 25 knots in the
late evening and early morning. showers. waves 8 to 12 feet.
waves occasionally around 15 feet. 
.thursday...west winds 20 to 25 knots with gusts to around
30 knots decreasing to 15 to 20 knots in the late evening and
early morning. showers likely until afternoon...then showers
early in the evening. a chance of showers in the late evening and
early morning. waves 6 to 9 feet. waves occasionally around
12 feet. 


$$

fzus63 kmkx 190748
glflm 
expires:202510191530;;386039

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
248 am cdt sun oct 19 2025

for waters beyond five nautical miles of shore on lake michigan.

waves are provided as a range of significant wave heights, which
is the average of the highest 1/3 of the wave, along with the
average height of the highest 10% of the waves which will
occasionally be encountered.

.synopsis...

low pressure of 29.4 inches over lower michigan will deepen to
29.3 inches as it moves into eastern ontario this morning. northwest
gales are expected over the lake today into this evening. rain 
and thunderstorms are expected over the lake into this afternoon.

winds briefly weaken late tonight into early monday, then turn 
south and accelerate to roughly 30 knots mid day monday as 29.5 
inch low pressure tracks east across northern minnesota. this low 
will then drag another cold front across the lake monday night, 
with west gales looking likely behind the front late monday night 
through tuesday night, possibly into wednesday as the 
aforementioned low pressure lingers over southern canada.


lmz261-362-364-366-563-565-567-868-191530-
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-
248 am cdt sun oct 19 2025

sheboygan wi to pentwater mi north...

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

.today...north gales to 35 kt becoming northwest. showers this
morning, then slight chance of showers this afternoon. waves 8 to
11 ft occasionally to 14 ft building to 8 to 12 ft occasionally
to 16 ft, then subsiding to 7 to 10 ft occasionally to 13 ft. 
.tonight...northwest winds to 30 kt diminishing to 10 to 20 kt.
waves 6 to 9 ft occasionally to 12 ft subsiding to 3 to 5 ft. 
.monday...west winds 10 to 15 kt becoming southwest 10 to 20 kt
late in the morning, then increasing to 15 to 25 kt early in the
afternoon becoming south to 30 kt late. waves 2 to 4 ft building
to 7 to 10 ft occasionally to 13 ft. 
.monday night...south winds to 30 kt becoming southwest. showers.
waves 10 to 14 ft occasionally to 18 ft. 
.tuesday...west winds to 30 kt increasing to gales to 35 kt.
chance of showers in the morning, then showers in the afternoon.
waves 8 to 11 ft occasionally to 14 ft building to 10 to 14 ft
occasionally to 18 ft. 
.tuesday night...west gales to 35 kt becoming northwest. rain
showers. waves 10 to 14 ft occasionally to 18 ft. 
.wednesday...northwest gales to 35 kt. rain showers. waves 8 to
12 ft occasionally to 16 ft subsiding to 8 to 11 ft occasionally
to 14 ft. 
.thursday...northwest winds to 30 kt diminishing to 15 to 25 kt.
chance of rain showers. waves 4 to 7 ft occasionally to 9 ft
subsiding to 4 to 6 ft occasionally to 8 ft.  

$$

fzus63 kmkx 190748
glflm 
expires:202510191530;;386040

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
248 am cdt sun oct 19 2025

for waters beyond five nautical miles of shore on lake michigan.

waves are provided as a range of significant wave heights, which
is the average of the highest 1/3 of the wave, along with the
average height of the highest 10% of the waves which will
occasionally be encountered.

.synopsis...

low pressure of 29.4 inches over lower michigan will deepen to
29.3 inches as it moves into eastern ontario this morning. northwest
gales are expected over the lake today into this evening. rain 
and thunderstorms are expected over the lake into this afternoon.

winds briefly weaken late tonight into early monday, then turn 
south and accelerate to roughly 30 knots mid day monday as 29.5 
inch low pressure tracks east across northern minnesota. this low 
will then drag another cold front across the lake monday night, 
with west gales looking likely behind the front late monday night 
through tuesday night, possibly into wednesday as the 
aforementioned low pressure lingers over southern canada.


lmz080-669-671-673-675-777-779-870-872-874-876-878-191530-
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-
248 am cdt sun oct 19 2025

sheboygan wi to pentwater mi south...

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

.today...northwest gales to 35 kt increasing to gales to 40 kt.
showers this morning, then chance of showers this afternoon.
waves 8 to 12 ft occasionally to 16 ft building to 12 to 16 ft
occasionally to 21 ft. 
.tonight...northwest gales to 35 kt diminishing to 10 to 20 kt.
waves 10 to 14 ft occasionally to 18 ft subsiding to 5 to 8 ft
occasionally to 10 ft. 
.monday...west winds 10 to 20 kt becoming southwest late in the
morning, then becoming south to 30 kt in the afternoon. waves
4 to 6 ft occasionally to 8 ft building to 8 to 11 ft
occasionally to 14 ft. 
.monday night...south gales to 35 kt becoming southwest to 30 kt.
showers likely in the evening, then showers overnight. waves
10 to 14 ft occasionally to 18 ft. 
.tuesday...west gales to 35 kt increasing to gales to 40 kt.
chance of showers in the morning, then showers likely in the
afternoon. waves 10 to 14 ft occasionally to 18 ft building to
12 to 16 ft occasionally to 21 ft. 
.tuesday night...west gales to 40 kt. showers. waves 14 to 18 ft
occasionally to 23 ft. 
.wednesday...northwest gales to 40 kt diminishing to gales to
35 kt. chance of rain showers. waves 12 to 16 ft occasionally to
21 ft. 
.thursday...northwest winds to 30 kt diminishing to 15 to 25 kt.
chance of rain showers. waves 8 to 11 ft occasionally to 14 ft
subsiding to 6 to 9 ft occasionally to 12 ft.  

$$

fzus63 kmqt 190801
glfls 
expires:202510192000;;386611

open lake forecast for lake superior
national weather service marquette mi
401 am edt sun oct 19 2025

for waters beyond 5 nautical miles of shore on lake superior.

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

.synopsis...

a 29.4 inch low over lower michigan will deepen to 29.3 inches as it 
crosses lake huron this morning. by this evening, the low will be 
along the eastern shores of james bay while 29.9 inch ridging moves 
over lake superior associated with 30.1 inch high pressure over the 
us southeast. ridging remains over the lake until monday afternoon, 
when a 29.5 inch low moves over minnesota, deepening to 29.4 inches 
over western lake superior tuesday morning. the low weakens to 29.6 
inches as it reaches the eastern part of the lake tuesday night and 
the ontario/quebec line wednesday afternoon. as the low shifts into 
quebec at 29.5 inches thursday afternoon, ridging of 30.1 inches 
builds over the great plains, moving over lake superior by the end 
of the week into the weekend.



lsz162-192000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 am edt sun oct 19 2025 /301 am cdt sun oct 19 2025/

.early this morning...northwest winds 15 to 25 knots. waves 1 to
3 feet. 
.today...northwest winds 15 to 25 knots. waves building to 2 to
4 feet. 
.tonight...northwest winds 10 to 20 knots diminishing to 5 to
15 knots after midnight, then backing west late. waves subsiding
to calm to 2 feet. 
.monday...southeast winds 5 to 15 knots becoming east 10 to
20 knots in the afternoon, then increasing to 15 to 25 knots
late. a slight chance of showers through early afternoon, then
showers likely by mid afternoon. waves building to 2 to 4 feet. 
.monday night...southeast winds 15 to 25 knots becoming west
20 to 30 knots after midnight. showers. waves building to 3 to
5 feet occasionally to 7 feet. 
.tuesday...west winds 20 to 30 knots becoming north gales to
35 knots by mid afternoon. showers. waves building to 4 to 7 feet
occasionally to 9 feet. 
.tuesday night...north gales to 35 knots becoming northwest 20 to
30 knots after midnight. rain showers likely through midnight,
then a chance of rain showers after midnight. waves building to
5 to 8 feet occasionally to 10 feet, then subsiding to 3 to
6 feet occasionally to 8 feet. 
.wednesday...northwest winds 20 to 30 knots diminishing to 15 to
25 knots. rain showers likely. waves subsiding to 1 to 3 feet. 
.thursday...northwest winds 10 to 20 knots diminishing to 5 to
15 knots. waves subsiding to calm to 2 feet. 

$$

fzus63 kmqt 190801
glfls 
expires:202510192000;;386612

open lake forecast for lake superior
national weather service marquette mi
401 am edt sun oct 19 2025

for waters beyond 5 nautical miles of shore on lake superior.

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

.synopsis...

a 29.4 inch low over lower michigan will deepen to 29.3 inches as it 
crosses lake huron this morning. by this evening, the low will be 
along the eastern shores of james bay while 29.9 inch ridging moves 
over lake superior associated with 30.1 inch high pressure over the 
us southeast. ridging remains over the lake until monday afternoon, 
when a 29.5 inch low moves over minnesota, deepening to 29.4 inches 
over western lake superior tuesday morning. the low weakens to 29.6 
inches as it reaches the eastern part of the lake tuesday night and 
the ontario/quebec line wednesday afternoon. as the low shifts into 
quebec at 29.5 inches thursday afternoon, ridging of 30.1 inches 
builds over the great plains, moving over lake superior by the end 
of the week into the weekend.



lsz263-192000-
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 19 2025

.early this morning...northwest winds 10 to 20 knots. waves 1 to
3 feet. 
.today...northwest winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. a slight chance of showers by mid
afternoon. waves building to 3 to 5 feet occasionally to 7 feet. 
.tonight...northwest winds 15 to 25 knots diminishing to 10 to
20 knots after midnight, then becoming west 5 to 15 knots late.
waves subsiding to calm to 2 feet. 
.monday...south winds 5 to 15 knots becoming southeast 10 to
20 knots in the afternoon, then increasing to 15 to 25 knots
late. a chance of showers by mid afternoon. waves building to
2 to 4 feet. 
.monday night...southeast winds 20 to 30 knots becoming south
15 to 25 knots after midnight. showers. waves building to 4 to
7 feet occasionally to 9 feet. 
.tuesday...west gales to 35 knots veering north by mid afternoon.
showers. waves building to 6 to 10 feet occasionally to 13 feet. 
.tuesday night...north gales to 35 knots backing northwest after
midnight. rain showers. waves 7 to 10 feet occasionally to
13 feet. 
.wednesday...northwest gales to 35 knots diminishing to 20 to
30 knots. rain showers likely, then a chance of rain showers.
waves subsiding to 3 to 6 feet occasionally to 8 feet. 
.thursday...northwest winds 20 to 30 knots diminishing to 10 to
20 knots. waves subsiding to calm to 2 feet. 

$$

fzus63 kmqt 190801
glfls 
expires:202510192000;;386613

open lake forecast for lake superior
national weather service marquette mi
401 am edt sun oct 19 2025

for waters beyond 5 nautical miles of shore on lake superior.

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

.synopsis...

a 29.4 inch low over lower michigan will deepen to 29.3 inches as it 
crosses lake huron this morning. by this evening, the low will be 
along the eastern shores of james bay while 29.9 inch ridging moves 
over lake superior associated with 30.1 inch high pressure over the 
us southeast. ridging remains over the lake until monday afternoon, 
when a 29.5 inch low moves over minnesota, deepening to 29.4 inches 
over western lake superior tuesday morning. the low weakens to 29.6 
inches as it reaches the eastern part of the lake tuesday night and 
the ontario/quebec line wednesday afternoon. as the low shifts into 
quebec at 29.5 inches thursday afternoon, ridging of 30.1 inches 
builds over the great plains, moving over lake superior by the end 
of the week into the weekend.



lsz264-192000-
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 19 2025

.early this morning...northwest winds 10 to 20 knots. waves calm
to 2 feet building to 1 to 3 feet. 
.today...northwest winds 15 to 25 knots. a slight chance of
showers by mid afternoon. waves building to 3 to 5 feet
occasionally to 7 feet. 
.tonight...northwest winds 15 to 25 knots diminishing to 5 to
15 knots. a slight chance of showers through midnight. waves
subsiding to 1 to 3 feet. 
.monday...west winds 5 to 15 knots becoming south 10 to 20 knots
in the afternoon, then becoming southeast 20 to 30 knots late. a
slight chance of showers by mid afternoon. waves subsiding to
calm to 2 feet, then building to 2 to 4 feet. 
.monday night...southeast winds 20 to 30 knots. showers. waves
building to 6 to 9 feet occasionally to 11 feet. 
.tuesday...east winds 20 to 30 knots becoming northeast gales to
35 knots by mid afternoon. showers. waves building to 6 to
10 feet occasionally to 13 feet. 
.tuesday night...north gales to 35 knots. rain showers. waves
subsiding to 5 to 8 feet occasionally to 10 feet, then building
to 8 to 11 feet occasionally to 14 feet. 
.wednesday...northwest gales to 35 knots veering north. rain
showers, then a chance of rain showers. waves subsiding to 5 to
8 feet occasionally to 10 feet. 
.thursday...northwest gales to 35 knots diminishing to 10 to
20 knots. a chance of rain showers. waves building to 6 to 9 feet
occasionally to 11 feet, then subsiding to 1 to 3 feet. 

$$

fzus63 kmqt 190801
glfls 
expires:202510192000;;386614

open lake forecast for lake superior
national weather service marquette mi
401 am edt sun oct 19 2025

for waters beyond 5 nautical miles of shore on lake superior.

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

.synopsis...

a 29.4 inch low over lower michigan will deepen to 29.3 inches as it 
crosses lake huron this morning. by this evening, the low will be 
along the eastern shores of james bay while 29.9 inch ridging moves 
over lake superior associated with 30.1 inch high pressure over the 
us southeast. ridging remains over the lake until monday afternoon, 
when a 29.5 inch low moves over minnesota, deepening to 29.4 inches 
over western lake superior tuesday morning. the low weakens to 29.6 
inches as it reaches the eastern part of the lake tuesday night and 
the ontario/quebec line wednesday afternoon. as the low shifts into 
quebec at 29.5 inches thursday afternoon, ridging of 30.1 inches 
builds over the great plains, moving over lake superior by the end 
of the week into the weekend.



lsz265-192000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
401 am edt sun oct 19 2025

.early this morning...north winds 20 to 30 knots. a slight chance
of showers. waves 1 to 3 feet building to 2 to 4 feet. 
.today...northwest winds 20 to 30 knots increasing to 30 knots
with a few gale force gusts to 35 knots possible in the
afternoon. a slight chance of showers. waves building to 4 to
7 feet occasionally to 9 feet. 
.tonight...northwest winds to 30 knots with a few gale force
gusts to 35 knots possible diminishing to 15 to 25 knots after
midnight, then becoming west 10 to 20 knots late. a slight chance
of showers through midnight. waves subsiding to calm to 2 feet. 
.monday...west winds 10 to 20 knots backing south in the
afternoon, then becoming southeast 20 to 30 knots late. a slight
chance of showers by mid afternoon. waves building to 1 to
3 feet. 
.monday night...southeast winds 20 to 30 knots veering south
after midnight. showers. waves building to 3 to 5 feet
occasionally to 7 feet. 
.tuesday...west winds 20 to 30 knots veering northwest by mid
afternoon. showers. waves building to 4 to 7 feet occasionally to
9 feet. 
.tuesday night...north gales to 35 knots backing northwest after
midnight. showers. waves building to 6 to 9 feet occasionally to
11 feet. 
.wednesday...northwest gales to 35 knots. rain showers. waves
building to 7 to 10 feet occasionally to 13 feet, then subsiding
to 3 to 6 feet occasionally to 8 feet. 
.thursday...northwest gales to 35 knots diminishing to 15 to
25 knots. rain showers likely, then a chance of rain showers.
waves subsiding to calm to 2 feet. 

$$

fzus63 kmqt 190801
glfls 
expires:202510192000;;386615

open lake forecast for lake superior
national weather service marquette mi
401 am edt sun oct 19 2025

for waters beyond 5 nautical miles of shore on lake superior.

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

.synopsis...

a 29.4 inch low over lower michigan will deepen to 29.3 inches as it 
crosses lake huron this morning. by this evening, the low will be 
along the eastern shores of james bay while 29.9 inch ridging moves 
over lake superior associated with 30.1 inch high pressure over the 
us southeast. ridging remains over the lake until monday afternoon, 
when a 29.5 inch low moves over minnesota, deepening to 29.4 inches 
over western lake superior tuesday morning. the low weakens to 29.6 
inches as it reaches the eastern part of the lake tuesday night and 
the ontario/quebec line wednesday afternoon. as the low shifts into 
quebec at 29.5 inches thursday afternoon, ridging of 30.1 inches 
builds over the great plains, moving over lake superior by the end 
of the week into the weekend.



lsz266-192000-
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 19 2025

.early this morning...north winds 15 to 25 knots. a chance of
showers. waves 1 to 3 feet building to 3 to 5 feet occasionally
to 7 feet. 
.today...north winds 20 to 30 knots becoming northwest to
30 knots with a few gale force gusts to 35 knots possible in the
afternoon. a chance of showers. waves building to 7 to 10 feet
occasionally to 13 feet. 
.tonight...northwest winds 20 to 30 knots diminishing to 10 to
20 knots. a slight chance of showers. waves subsiding to 3 to
5 feet occasionally to 7 feet. 
.monday...west winds 10 to 20 knots backing south in the
afternoon, then becoming southeast 20 to 30 knots late. a slight
chance of showers by mid afternoon. waves subsiding to calm to
2 feet, then building to 1 to 3 feet. 
.monday night...southeast winds 20 to 30 knots. showers. waves
building to 6 to 9 feet occasionally to 11 feet. 
.tuesday...southeast winds 20 to 30 knots backing northeast by
mid afternoon. showers. waves subsiding to 5 to 8 feet
occasionally to 10 feet. 
.tuesday night...north winds 20 to 30 knots increasing to gales
to 35 knots after midnight. showers. waves subsiding to 4 to
7 feet occasionally to 9 feet, then building to 7 to 10 feet
occasionally to 13 feet. 
.wednesday...northwest gales to 35 knots veering north. rain
showers. waves building to 9 to 12 feet occasionally to 15 feet,
then subsiding to 6 to 9 feet occasionally to 11 feet. 
.thursday...northwest winds 20 to 30 knots diminishing to 15 to
25 knots. rain showers likely, then a chance of rain showers.
waves subsiding to 2 to 4 feet. 

$$

fzus63 kmqt 190801
glfls 
expires:202510192000;;386616

open lake forecast for lake superior
national weather service marquette mi
401 am edt sun oct 19 2025

for waters beyond 5 nautical miles of shore on lake superior.

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

.synopsis...

a 29.4 inch low over lower michigan will deepen to 29.3 inches as it 
crosses lake huron this morning. by this evening, the low will be 
along the eastern shores of james bay while 29.9 inch ridging moves 
over lake superior associated with 30.1 inch high pressure over the 
us southeast. ridging remains over the lake until monday afternoon, 
when a 29.5 inch low moves over minnesota, deepening to 29.4 inches 
over western lake superior tuesday morning. the low weakens to 29.6 
inches as it reaches the eastern part of the lake tuesday night and 
the ontario/quebec line wednesday afternoon. as the low shifts into 
quebec at 29.5 inches thursday afternoon, ridging of 30.1 inches 
builds over the great plains, moving over lake superior by the end 
of the week into the weekend.



lsz267-192000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
401 am edt sun oct 19 2025

.early this morning...north winds 15 to 25 knots. showers. waves
calm to 2 feet building to 1 to 3 feet. 
.today...north winds 20 to 30 knots becoming northwest to
30 knots with a few gale force gusts to 35 knots possible in the
afternoon. a chance of showers. waves building to 7 to 10 feet
occasionally to 13 feet. 
.tonight...northwest winds to 30 knots with a few gale force
gusts to 35 knots possible diminishing to 15 to 25 knots. a
slight chance of showers. waves subsiding to 3 to 5 feet
occasionally to 7 feet. 
.monday...northwest winds 10 to 20 knots backing southwest in the
afternoon, then backing southeast late. waves subsiding to calm
to 2 feet. 
.monday night...southeast winds 15 to 25 knots increasing to
gales to 35 knots after midnight. a chance of showers through
midnight, then showers after midnight. waves building to 5 to
8 feet occasionally to 10 feet. 
.tuesday...southeast winds 20 to 30 knots becoming west 15 to
25 knots by mid afternoon. showers. waves subsiding to 3 to
6 feet occasionally to 8 feet. 
.tuesday night...north winds 15 to 25 knots. showers. waves
subsiding to 3 to 5 feet occasionally to 7 feet, then building to
5 to 8 feet occasionally to 10 feet. 
.wednesday...northwest winds 20 to 30 knots veering north. rain
showers. waves building to 8 to 11 feet occasionally to 14 feet,
then subsiding to 5 to 8 feet occasionally to 10 feet. 
.thursday...northwest winds 20 to 30 knots diminishing to 15 to
25 knots. rain showers likely. waves subsiding to 2 to 4 feet. 

$$