fzus63 kdtx 120742
glflh 
expires:202610121545;;958417

open lake forecast for lake huron
national weather service detroit/pontiac mi
342 am edt mon oct 12 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...low pressure, 29.60 inches, will then push from the
central plains into the great lakes tomorrow morning, bringing
the next potential for rain showers and isolated thunderstorms.
departure of this system will then facilitate the passage of a
cold front wednesday morning, bringing breezy northwest flow
across northern lake huron.


lhz361-121545-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
342 am edt mon oct 12 2026

.today...light and variable winds becoming northeast 5 to
10 knots early in the afternoon...then becoming east 10 to
15 knots late in the afternoon. waves 2 feet or less. 
.tonight...east winds 15 to 20 knots. rain and a chance of
thunderstorms after midnight. waves 1 to 3 feet building to 2 to
4 feet in the late evening and overnight. 
.tuesday...east winds 10 to 15 knots becoming north 5 to 10 knots
early in the afternoon. a chance of rain and thunderstorms in the
morning...then a chance of rain in the afternoon. waves 2 to
4 feet. 
.tuesday night...northwest winds 5 to 10 knots increasing to
10 to 15 knots after midnight. waves 2 feet or less. 
.wednesday...northwest winds 10 to 15 knots becoming north 5 to
10 knots late in the evening. waves 1 to 3 feet building to 2 to
4 feet. 
.thursday...northeast winds 10 to 15 knots becoming southeast
5 to 10 knots. rain likely by midnight. waves 1 to 3 feet. 
.friday...west winds 10 to 15 knots with gusts to around 30 knots
becoming northwest to 30 knots with gusts to 45 knot gales until
early evening...then decreasing to 20 to 25 knots with gusts to
40 knot gales by midnight. rain likely early in the morning...
then a chance of rain until early evening. waves 3 to 5 feet
building to 8 to 12 feet. waves occasionally around 15 feet. 


$$

fzus63 kdtx 120742
glflh 
expires:202610121545;;958418

open lake forecast for lake huron
national weather service detroit/pontiac mi
342 am edt mon oct 12 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...low pressure, 29.60 inches, will then push from the
central plains into the great lakes tomorrow morning, bringing
the next potential for rain showers and isolated thunderstorms.
departure of this system will then facilitate the passage of a
cold front wednesday morning, bringing breezy northwest flow
across northern lake huron.


lhz362-363-121545-
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-
342 am edt mon oct 12 2026

.today...southwest winds 10 to 15 knots becoming south 5 to
10 knots early in the afternoon...then backing to the east late
in the afternoon. waves 1 to 3 feet. 
.tonight...east winds 10 to 15 knots becoming northeast 5 to
10 knots early in the morning. a chance of rain and thunderstorms
after midnight. waves 1 to 3 feet building to 2 to 4 feet in the
late evening and overnight. 
.tuesday...east winds 10 to 15 knots. a chance of rain. waves
1 to 3 feet. 
.tuesday night...northwest winds 10 to 15 knots decreasing to
5 to 10 knots in the late evening and overnight. waves 1 to
3 feet. 
.wednesday...northwest winds 10 to 15 knots increasing to 15 to
20 knots late in the afternoon...then becoming north 10 to
15 knots late in the evening. waves 2 to 4 feet building to 3 to
5 feet. 
.thursday...northeast winds 10 to 15 knots becoming east 5 to
10 knots until early evening...then veering to the southeast by
midnight. rain likely . waves 2 to 4 feet subsiding to 1 to
3 feet until early evening...then building to 2 to 4 feet by
midnight. 
.friday...west winds 15 to 20 knots with gusts to around 30 knots
becoming northwest to 30 knots with gusts to 45 knot gales in the
late morning and early afternoon...then increasing to 35 knot
gales with gusts to 45 knot gales early in the evening decreasing
to 30 knots with gusts to 45 knot gales by midnight. rain likely
until afternoon...then a chance of rain early in the evening.
waves 3 to 5 feet building to 12 to 16 feet. waves occasionally
around 20 feet. a gale warning may be needed. 


$$

fzus63 kdtx 120742
glflh 
expires:202610121545;;958419

open lake forecast for lake huron
national weather service detroit/pontiac mi
342 am edt mon oct 12 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...low pressure, 29.60 inches, will then push from the
central plains into the great lakes tomorrow morning, bringing
the next potential for rain showers and isolated thunderstorms.
departure of this system will then facilitate the passage of a
cold front wednesday morning, bringing breezy northwest flow
across northern lake huron.


lhz462>464-121545-
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-
342 am edt mon oct 12 2026

.today...southwest winds 10 to 15 knots becoming south 5 to
10 knots in the afternoon. waves 1 to 3 feet. 
.tonight...south winds 10 to 15 knots decreasing to 5 to 10 knots
after midnight. rain likely and a chance of thunderstorms after
midnight. waves 2 to 4 feet subsiding to 1 to 3 feet after
midnight. 
.tuesday...southwest winds 10 to 15 knots. a chance of rain.
waves 1 to 3 feet. 
.tuesday night...west winds 10 to 15 knots becoming northwest
5 to 10 knots in the late evening and overnight. waves 2 to
4 feet. 
.wednesday...northwest winds 5 to 10 knots becoming north 10 to
15 knots. waves 1 to 3 feet building to 3 to 5 feet late in the
afternoon. 
.thursday...northeast winds 10 to 15 knots becoming southeast
5 to 10 knots . rain likely . waves 3 to 5 feet subsiding to 1 to
3 feet early in the evening...then building to 2 to 4 feet by
midnight. 
.friday...west winds 15 to 20 knots becoming northwest at 35 knot
gales with gusts to 45 knot gales. rain likely until afternoon...
then a chance of rain . waves 2 to 4 feet building to 12 to
16 feet. waves occasionally around 20 feet. a gale warning may be
needed. 


$$

fzus63 kmkx 120645
glflm 
expires:202610121515;;956514

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
145 am cdt mon oct 12 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...

broad low pressure around 29.5 inches over the central plains to
minnesota will drive south-southwesterly winds into today. this 
low is expected to lift into minnesota and eventually central 
wisconsin by this evening. expecting scattered showers and 
isolated thunderstorms to develop tonight as the low approaches 
and crosses the open waters. winds shift to northwesterly on 
tuesday as an associated cold front crosses the lake and the low 
pressure exits east. the front may stall just south of the lake 
tuesday night, with a light northerly breeze across the lake and 
shower / thunderstorm potential towards the southern end of the 
lake. 

high pressure around 30.2 inches building into the northern plains
will keep winds northerly into wednesday, turning northeasterly
wednesday night and easterly into thursday as the high pressure
passes north of the lake and low pressure of 29.9 inches develops
near missouri / illinois. 

low pressure looks to cross lake michigan thursday night, with
strong high pressure descending from western canada into the
dakotas / nebraska into friday. the pressure gradient between
these two systems will drive strong northwest winds across the 
lake friday through friday night, with confidence increasing for a
period of sustained gales. depending on the central pressures of
the low, high & affiliated pressure gradient, a few gusts
approaching storm force could be possible. will be monitoring
trends for possible headlines over coming updates. 


lmz080-669-671-673-675-777-779-870-872-874-876-878-121515-
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-
145 am cdt mon oct 12 2026

sheboygan wi to pentwater mi south...

.today...southwest winds 10 to 20 kt becoming south. waves 3 to
5 ft. 
.tonight...south winds 10 to 20 kt becoming southwest 15 to
25 kt. slight chance of showers and thunderstorms. waves 3 to
5 ft building to 4 to 6 ft occasionally to 8 ft. 
.tuesday...west winds 15 to 25 kt becoming northwest 10 to 20 kt.
waves 4 to 7 ft occasionally to 9 ft subsiding to 3 to 5 ft. 
.tuesday night...north winds 10 to 15 kt. chance of showers.
waves 2 to 4 ft subsiding to 1 to 3 ft. 
.wednesday...northeast winds 10 to 20 kt becoming north. chance
of showers. waves 3 to 5 ft. 
.wednesday night...northeast winds 10 to 20 kt. waves 4 to 6 ft
occasionally to 8 ft. 
.thursday...east winds 15 to 25 kt diminishing to 10 to 20 kt.
showers likely. waves 4 to 6 ft occasionally to 8 ft. 
.friday...northwest gales to 45 kt. chance of showers. waves 10 
to 14 ft occasionally to 18 ft building to 14 to 18 ft 
occasionally to 23 ft. 

$$

fzus63 kmkx 120645
glflm 
expires:202610121515;;956513

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
145 am cdt mon oct 12 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...

broad low pressure around 29.5 inches over the central plains to
minnesota will drive south-southwesterly winds into today. this 
low is expected to lift into minnesota and eventually central 
wisconsin by this evening. expecting scattered showers and 
isolated thunderstorms to develop tonight as the low approaches 
and crosses the open waters. winds shift to northwesterly on 
tuesday as an associated cold front crosses the lake and the low 
pressure exits east. the front may stall just south of the lake 
tuesday night, with a light northerly breeze across the lake and 
shower / thunderstorm potential towards the southern end of the 
lake. 

high pressure around 30.2 inches building into the northern plains
will keep winds northerly into wednesday, turning northeasterly
wednesday night and easterly into thursday as the high pressure
passes north of the lake and low pressure of 29.9 inches develops
near missouri / illinois. 

low pressure looks to cross lake michigan thursday night, with
strong high pressure descending from western canada into the
dakotas / nebraska into friday. the pressure gradient between
these two systems will drive strong northwest winds across the 
lake friday through friday night, with confidence increasing for a
period of sustained gales. depending on the central pressures of
the low, high & affiliated pressure gradient, a few gusts
approaching storm force could be possible. will be monitoring
trends for possible headlines over coming updates. 


lmz261-362-364-366-563-565-567-868-121515-
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-
145 am cdt mon oct 12 2026

sheboygan wi to pentwater mi north...

.today...southwest winds 10 to 20 kt becoming southeast. waves
3 to 5 ft. 
.tonight...southeast winds 15 to 25 kt becoming south to 30 kt.
chance of showers and thunderstorms. waves 3 to 5 ft.
.tuesday...northwest winds 15 to 25 kt diminishing to 10 to
20 kt. chance of showers in the morning. waves 4 to 6 ft
occasionally to 8 ft subsiding to 2 to 4 ft. 
.tuesday night...north winds 10 to 15 kt. waves 1 to 3 ft. 
.wednesday...north winds 10 to 20 kt. waves 2 to 4 ft. 
.wednesday night...north winds 10 to 20 kt becoming northeast.
waves 2 to 4 ft. 
.thursday...east winds 10 to 20 kt becoming southeast 10 to
15 kt. chance of rain showers. waves 2 to 4 ft. 
.friday...northwest gales to 45 kt. chance of showers. waves 8 to
11 ft occasionally to 14 ft building to 10 to 14 ft occasionally 
to 18 ft. 

$$

fzus63 kmqt 120801
glfls 
expires:202610122000;;958862

open lake forecast for lake superior
national weather service marquette mi
401 am edt mon oct 12 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...

lake superior is currently under a 29.8 inch trough associated with 
a 29.5 inch colorado low. to the north, a 30.4 inch high is sprawled 
out over central canada. by this afternoon, the high will weaken to 
30.2 inches along the hudson bay shore of northern ontario while the 
colorado low moves to the missouri river basin, weakening to 29.6 
inches. this low weakens further to 29.7 inches over northern lake 
michigan tuesday morning as the high shifts into quebec. ridging 
dominates over lake superior midweek as the low continues marching 
east and high pressure of 30.2 inches builds over the dakotas by 
wednesday afternoon. the high further builds to 30.3 inches over the 
lake wednesday night while a 29.9 inch low develops over 
saskatchewan. by thursday evening, this low weakens to 30.0 inches 
over northern ontario as the high moves to new england. behind the 
low, a 30.7 inch high builds over eastern montana before expanding 
over the plains for friday.




lsz266-122000-
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 mon oct 12 2026

.early this morning...northeast winds 20 to 30 knots. a slight
chance of showers. waves 5 to 8 feet occasionally to 10 feet. 
.today...northeast winds 20 to 30 knots veering east in the
afternoon. a chance of showers. waves building to 6 to 10 feet
occasionally to 13 feet. 
.tonight...east winds 20 to 30 knots diminishing to 15 to
25 knots late. showers and a slight chance of thunderstorms.
waves subsiding to 4 to 7 feet occasionally to 9 feet. 
.tuesday...northeast winds 15 to 25 knots becoming north 10 to
20 knots in the afternoon, then backing northwest late. a chance
of showers through early afternoon. waves subsiding to 1 to
3 feet. 
.tuesday night...northwest winds 10 to 20 knots increasing to
15 to 25 knots after midnight. waves subsiding to calm to 2 feet,
then building to 1 to 3 feet. 
.wednesday...northwest winds 15 to 25 knots. waves building to
2 to 4 feet. 
.wednesday night...north winds 10 to 20 knots becoming east 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.thursday...south winds 10 to 20 knots becoming northwest gales
to 45 knots. a chance of showers, then showers. waves building to
9 to 12 feet occasionally to 15 feet. 
.friday...north gales to 45 knots backing northwest. a chance of
rain showers. waves building to 15 to 20 feet occasionally to
25 feet, then subsiding to 3 to 6 feet occasionally to 8 feet. 

$$

fzus63 kmqt 120801
glfls 
expires:202610122000;;958863

open lake forecast for lake superior
national weather service marquette mi
401 am edt mon oct 12 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...

lake superior is currently under a 29.8 inch trough associated with 
a 29.5 inch colorado low. to the north, a 30.4 inch high is sprawled 
out over central canada. by this afternoon, the high will weaken to 
30.2 inches along the hudson bay shore of northern ontario while the 
colorado low moves to the missouri river basin, weakening to 29.6 
inches. this low weakens further to 29.7 inches over northern lake 
michigan tuesday morning as the high shifts into quebec. ridging 
dominates over lake superior midweek as the low continues marching 
east and high pressure of 30.2 inches builds over the dakotas by 
wednesday afternoon. the high further builds to 30.3 inches over the 
lake wednesday night while a 29.9 inch low develops over 
saskatchewan. by thursday evening, this low weakens to 30.0 inches 
over northern ontario as the high moves to new england. behind the 
low, a 30.7 inch high builds over eastern montana before expanding 
over the plains for friday.




lsz267-122000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
401 am edt mon oct 12 2026

.early this morning...northeast winds 20 to 30 knots. waves 2 to
4 feet building to 4 to 7 feet occasionally to 9 feet. 
.today...northeast winds 20 to 30 knots veering east in the
afternoon. a chance of showers. waves building to 4 to 8 feet
occasionally to 10 feet. 
.tonight...east winds 20 to 30 knots diminishing to 15 to
25 knots late. a slight chance of showers through midnight, then
showers and a slight chance of thunderstorms after midnight.
waves subsiding to 3 to 5 feet occasionally to 7 feet. 
.tuesday...east winds 10 to 20 knots becoming north 5 to 15 knots
in the afternoon, then becoming northwest 10 to 20 knots late. a
chance of showers through early afternoon. waves subsiding to
calm to 2 feet. 
.tuesday night...northwest winds 10 to 20 knots increasing to
15 to 25 knots after midnight. waves building to 2 to 4 feet. 
.wednesday...northwest winds 15 to 25 knots. waves building to
3 to 5 feet occasionally to 7 feet, then subsiding to 2 to
4 feet. 
.wednesday night...north winds 10 to 20 knots veering east after
midnight. waves subsiding to calm to 2 feet. 
.thursday...southeast winds 10 to 20 knots becoming south gales
to 40 knots. a chance of showers, then showers. waves building to
7 to 10 feet occasionally to 13 feet. 
.friday...north gales to 45 knots. a chance of rain showers.
waves building to 15 to 20 feet occasionally to 25 feet, then
subsiding to 3 to 6 feet occasionally to 8 feet. 

$$

fzus63 kmqt 120801
glfls 
expires:202610122000;;958858

open lake forecast for lake superior
national weather service marquette mi
401 am edt mon oct 12 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...

lake superior is currently under a 29.8 inch trough associated with 
a 29.5 inch colorado low. to the north, a 30.4 inch high is sprawled 
out over central canada. by this afternoon, the high will weaken to 
30.2 inches along the hudson bay shore of northern ontario while the 
colorado low moves to the missouri river basin, weakening to 29.6 
inches. this low weakens further to 29.7 inches over northern lake 
michigan tuesday morning as the high shifts into quebec. ridging 
dominates over lake superior midweek as the low continues marching 
east and high pressure of 30.2 inches builds over the dakotas by 
wednesday afternoon. the high further builds to 30.3 inches over the 
lake wednesday night while a 29.9 inch low develops over 
saskatchewan. by thursday evening, this low weakens to 30.0 inches 
over northern ontario as the high moves to new england. behind the 
low, a 30.7 inch high builds over eastern montana before expanding 
over the plains for friday.




lsz162-122000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 am edt mon oct 12 2026 /301 am cdt mon oct 12 2026/

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

.early this morning...northeast gales to 35 knots. a slight
chance of showers. waves 4 to 7 feet occasionally to 9 feet
building to 6 to 9 feet occasionally to 11 feet. 
.today...northeast gales to 40 knots. a chance of showers. waves
building to 8 to 12 feet occasionally to 15 feet. 
.tonight...northeast gales to 35 knots diminishing to 20 to
30 knots late. showers and a slight chance of thunderstorms
through midnight, then a chance of showers after midnight. waves
subsiding to 5 to 8 feet occasionally to 10 feet. 
.tuesday...northeast winds 10 to 20 knots becoming west 5 to
15 knots in the afternoon. waves subsiding to 1 to 3 feet. 
.tuesday night...northwest winds 5 to 15 knots. waves subsiding
to calm to 2 feet. 
.wednesday...northwest winds 5 to 15 knots. waves calm to 2 feet.
.wednesday night...northeast winds 5 to 15 knots veering
southeast after midnight. waves calm to 2 feet. 
.thursday...southwest winds 10 to 20 knots becoming northwest
gales to 40 knots. a chance of showers. waves building to 5 to
8 feet occasionally to 10 feet. 
.friday...northwest gales to 40 knots diminishing to 20 to
30 knots. waves building to 7 to 10 feet occasionally to 13 feet,
then subsiding to calm to 2 feet. 

$$

fzus63 kmqt 120801
glfls 
expires:202610122000;;958859

open lake forecast for lake superior
national weather service marquette mi
401 am edt mon oct 12 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...

lake superior is currently under a 29.8 inch trough associated with 
a 29.5 inch colorado low. to the north, a 30.4 inch high is sprawled 
out over central canada. by this afternoon, the high will weaken to 
30.2 inches along the hudson bay shore of northern ontario while the 
colorado low moves to the missouri river basin, weakening to 29.6 
inches. this low weakens further to 29.7 inches over northern lake 
michigan tuesday morning as the high shifts into quebec. ridging 
dominates over lake superior midweek as the low continues marching 
east and high pressure of 30.2 inches builds over the dakotas by 
wednesday afternoon. the high further builds to 30.3 inches over the 
lake wednesday night while a 29.9 inch low develops over 
saskatchewan. by thursday evening, this low weakens to 30.0 inches 
over northern ontario as the high moves to new england. behind the 
low, a 30.7 inch high builds over eastern montana before expanding 
over the plains for friday.




lsz263-122000-
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 mon oct 12 2026

...gale warning in effect until noon edt today...

.early this morning...northeast winds 20 to 30 knots. a chance of
showers. waves 5 to 9 feet occasionally to 11 feet. 
.today...northeast gales to 35 knots diminishing to 20 to
30 knots late. a chance of showers. waves building to 7 to
11 feet occasionally to 14 feet. 
.tonight...northeast winds 20 to 30 knots diminishing to 15 to
25 knots late. a slight chance of thunderstorms through midnight.
showers. waves subsiding to 5 to 8 feet occasionally to 10 feet. 
.tuesday...northeast winds 10 to 20 knots becoming north 5 to
15 knots in the afternoon, then backing west late. a slight
chance of showers through early afternoon. waves subsiding to
1 to 3 feet. 
.tuesday night...northwest winds 5 to 15 knots. waves subsiding
to calm to 2 feet. 
.wednesday...northwest winds 5 to 15 knots. waves calm to 2 feet.
.wednesday night...north winds 5 to 15 knots veering southeast
after midnight. waves calm to 2 feet. 
.thursday...south winds 15 to 25 knots becoming northwest gales
to 45 knots. a chance of rain showers. waves building to 8 to
11 feet occasionally to 14 feet. 
.friday...north gales to 45 knots becoming northwest gales to
40 knots. waves building to 10 to 14 feet occasionally to
18 feet, then subsiding to 1 to 3 feet. 

$$

fzus63 kmqt 120801
glfls 
expires:202610122000;;958860

open lake forecast for lake superior
national weather service marquette mi
401 am edt mon oct 12 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...

lake superior is currently under a 29.8 inch trough associated with 
a 29.5 inch colorado low. to the north, a 30.4 inch high is sprawled 
out over central canada. by this afternoon, the high will weaken to 
30.2 inches along the hudson bay shore of northern ontario while the 
colorado low moves to the missouri river basin, weakening to 29.6 
inches. this low weakens further to 29.7 inches over northern lake 
michigan tuesday morning as the high shifts into quebec. ridging 
dominates over lake superior midweek as the low continues marching 
east and high pressure of 30.2 inches builds over the dakotas by 
wednesday afternoon. the high further builds to 30.3 inches over the 
lake wednesday night while a 29.9 inch low develops over 
saskatchewan. by thursday evening, this low weakens to 30.0 inches 
over northern ontario as the high moves to new england. behind the 
low, a 30.7 inch high builds over eastern montana before expanding 
over the plains for friday.




lsz264-122000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
401 am edt mon oct 12 2026

.early this morning...northeast winds 20 to 30 knots. a chance of
showers. waves 5 to 9 feet occasionally to 11 feet. 
.today...northeast winds 20 to 30 knots veering east in the
afternoon. showers through early afternoon, then a chance of
showers by mid afternoon. waves building to 7 to 10 feet
occasionally to 13 feet, then subsiding to 5 to 8 feet
occasionally to 10 feet. 
.tonight...east winds 20 to 30 knots becoming northeast 15 to
25 knots late. showers. waves subsiding to 4 to 7 feet
occasionally to 9 feet. 
.tuesday...northeast winds 10 to 20 knots becoming north 5 to
15 knots in the afternoon, then backing northwest late. a slight
chance of showers through early afternoon. waves subsiding to
1 to 3 feet. 
.tuesday night...northwest winds 5 to 15 knots increasing to
10 to 20 knots after midnight. waves subsiding to calm to 2 feet,
then building to 1 to 3 feet. 
.wednesday...northwest winds 10 to 20 knots. waves subsiding to
calm to 2 feet. 
.wednesday night...north winds 5 to 15 knots veering east after
midnight. waves calm to 2 feet. 
.thursday...south winds 5 to 15 knots becoming northwest gales to
45 knots. a chance of showers, then showers likely. waves
building to 7 to 10 feet occasionally to 13 feet. 
.friday...north gales to 45 knots becoming northwest gales to
40 knots. a chance of rain showers. waves building to 11 to
15 feet occasionally to 19 feet, then subsiding to 1 to 3 feet. 

$$

fzus63 kmqt 120801
glfls 
expires:202610122000;;958861

open lake forecast for lake superior
national weather service marquette mi
401 am edt mon oct 12 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...

lake superior is currently under a 29.8 inch trough associated with 
a 29.5 inch colorado low. to the north, a 30.4 inch high is sprawled 
out over central canada. by this afternoon, the high will weaken to 
30.2 inches along the hudson bay shore of northern ontario while the 
colorado low moves to the missouri river basin, weakening to 29.6 
inches. this low weakens further to 29.7 inches over northern lake 
michigan tuesday morning as the high shifts into quebec. ridging 
dominates over lake superior midweek as the low continues marching 
east and high pressure of 30.2 inches builds over the dakotas by 
wednesday afternoon. the high further builds to 30.3 inches over the 
lake wednesday night while a 29.9 inch low develops over 
saskatchewan. by thursday evening, this low weakens to 30.0 inches 
over northern ontario as the high moves to new england. behind the 
low, a 30.7 inch high builds over eastern montana before expanding 
over the plains for friday.




lsz265-122000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
401 am edt mon oct 12 2026

.early this morning...northeast winds 15 to 25 knots. waves 3 to
6 feet occasionally to 8 feet. 
.today...northeast winds 20 to 30 knots veering east in the
afternoon. a chance of showers. waves building to 6 to 9 feet
occasionally to 11 feet. 
.tonight...east winds 20 to 30 knots. showers and a slight chance
of thunderstorms. waves subsiding to 4 to 7 feet occasionally to
9 feet. 
.tuesday...northeast winds 15 to 25 knots becoming north 10 to
20 knots in the afternoon, then backing northwest late. a slight
chance of showers through early afternoon. waves subsiding to
1 to 3 feet. 
.tuesday night...northwest winds 10 to 20 knots increasing to
15 to 25 knots after midnight. waves subsiding to calm to 2 feet,
then building to 1 to 3 feet. 
.wednesday...northwest winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. waves building to 2 to 4 feet, then
subsiding to 1 to 3 feet. 
.wednesday night...north winds 5 to 15 knots veering east after
midnight. waves subsiding to calm to 2 feet. 
.thursday...south winds 10 to 20 knots becoming northwest gales
to 45 knots. a chance of showers, then showers. waves building to
8 to 11 feet occasionally to 14 feet. 
.friday...north storm force winds to 50 knots becoming northwest
gales to 45 knots. a chance of rain showers. waves building to
15 to 20 feet occasionally to 25 feet, then subsiding to 2 to
4 feet. 

$$