fzus63 kdtx 091347
glflh 
expires:202604092200;;083510

open lake forecast for lake huron
national weather service detroit/pontiac mi
947 am edt thu apr 9 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 cold front partially sweeps through the area today
offering a chance for a thunderstorm over the southern lakes. a
weak low, 30.10 inches, slides along the front and across the
region tonight into friday bringing wider spread showers but very
limited potential for thunderstorms. high pressure then builds
out of the upper midwest to start the weekend, but active weather
will be possible again sunday through tuesday.


lhz361-092200-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
947 am edt thu apr 9 2026

.rest of today...southwest winds 10 to 15 knots becoming west
15 to 20 knots early in the afternoon...then decreasing to 10 to
15 knots late in the afternoon. waves 3 to 5 feet. 
.tonight...west winds 10 to 15 knots decreasing to 5 to 10 knots
late in the evening...then becoming light and variable after
midnight. waves 3 to 5 feet subsiding to 1 to 3 feet in the late
evening and overnight. 
.friday...light and variable winds becoming west 5 to 10 knots
early in the afternoon. waves 2 feet or less. 
.friday night...northwest winds 5 to 10 knots. waves 2 feet or
less. 
.saturday...west winds 5 to 10 knots backing to the southeast
late in the afternoon...then increasing to 10 to 15 knots late in
the evening. a chance of rain late in the evening. waves 2 feet
or less building to 2 to 4 feet late in the evening. 
.sunday...southeast winds 15 to 20 knots becoming south 20 to
25 knots with gusts to around 30 knots by midnight. rain. waves
5 to 7 feet building to 6 to 9 feet by midnight. waves
occasionally around 12 feet. 
.monday...southwest winds 20 to 25 knots with gusts to around
30 knots decreasing to 15 to 20 knots in the late morning and
early afternoon...then becoming west 10 to 15 knots early in the
evening veering to the northeast by midnight. rain likely early
in the morning...then a chance of rain until early evening. rain
likely by midnight. waves 6 to 9 feet subsiding to 2 to 4 feet.
waves occasionally around 12 feet. 


$$

fzus63 kdtx 091347
glflh 
expires:202604092200;;083511

open lake forecast for lake huron
national weather service detroit/pontiac mi
947 am edt thu apr 9 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 cold front partially sweeps through the area today
offering a chance for a thunderstorm over the southern lakes. a
weak low, 30.10 inches, slides along the front and across the
region tonight into friday bringing wider spread showers but very
limited potential for thunderstorms. high pressure then builds
out of the upper midwest to start the weekend, but active weather
will be possible again sunday through tuesday.


lhz362-363-092200-
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-
947 am edt thu apr 9 2026

.rest of today...southwest winds 10 to 15 knots. waves 5 to
7 feet. waves occasionally around 10 feet. 
.tonight...north winds 10 to 15 knots becoming light and
variable. a chance of rain and snow after midnight. waves 3 to
5 feet subsiding to 1 to 3 feet after midnight. 
.friday...light and variable winds becoming north 5 to 10 knots
in the late morning and afternoon. a chance of rain and snow.
waves 2 feet or less. 
.friday night...north winds 5 to 10 knots backing to the
northwest in the late evening and overnight. waves 1 to 3 feet. 
.saturday...west winds 5 to 10 knots backing to the southeast
late in the afternoon...then increasing to 10 to 15 knots late in
the evening. waves 2 feet or less building to 2 to 4 feet late in
the evening. 
.sunday...southeast winds 15 to 20 knots becoming south 20 to
25 knots with gusts to around 30 knots . rain likely in the late
morning and early afternoon. a chance of rain early in the
evening...then rain likely by midnight. waves 5 to 7 feet
building to 8 to 12 feet . waves occasionally around 15 feet. 
.monday...southwest winds 20 to 25 knots with gusts to around
30 knots decreasing to 10 to 15 knots. rain likely early in the
morning...then a chance of rain until early evening. rain likely
by midnight. waves 8 to 12 feet subsiding to 3 to 5 feet by
midnight. waves occasionally around 15 feet. 


$$

fzus63 kdtx 091347
glflh 
expires:202604092200;;083512

open lake forecast for lake huron
national weather service detroit/pontiac mi
947 am edt thu apr 9 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 cold front partially sweeps through the area today
offering a chance for a thunderstorm over the southern lakes. a
weak low, 30.10 inches, slides along the front and across the
region tonight into friday bringing wider spread showers but very
limited potential for thunderstorms. high pressure then builds
out of the upper midwest to start the weekend, but active weather
will be possible again sunday through tuesday.


lhz462>464-092200-
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-
947 am edt thu apr 9 2026

.rest of today...south winds 15 to 20 knots becoming southwest
10 to 15 knots in the afternoon. a chance of rain late in the
morning. waves 4 to 6 feet. waves occasionally around 8 feet. 
.tonight...west winds 10 to 15 knots becoming northeast early in
the morning. a chance of rain after midnight. waves 2 to 4 feet
subsiding to 1 to 3 feet in the late evening and overnight. 
.friday...northeast winds 5 to 10 knots. rain in the morning.
waves 2 feet or less. 
.friday night...north winds 5 to 10 knots. waves 2 feet or less. 
.saturday...northwest winds 5 to 10 knots in the morning becoming
light and variable...then becoming northeast 5 to 10 knots late
in the afternoon veering to the southeast. waves 2 feet or less. 
.sunday...southeast winds 10 to 15 knots becoming south 20 to
25 knots with gusts to around 30 knots. a chance of rain. waves
3 to 5 feet building to 5 to 7 feet . waves occasionally around
10 feet. 
.monday...southwest winds 20 to 25 knots with gusts to around
30 knots decreasing to 10 to 15 knots. a chance of rain. rain
likely by midnight. waves 5 to 7 feet subsiding to 3 to 5 feet by
midnight. waves occasionally around 10 feet. 


$$

fzus63 kmkx 091353
glflm 
expires:202604092115;;083583

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
853 am cdt thu apr 9 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...

low pressure around 29.7 inches over far western ontario will
track north of lake superior through late morning. the winds
behind the associated front dropping down lake michigan early this
morning will be westerly and light. the gale warning will be
allowed to expire at 4 am.

light and variable winds will prevail this afternoon through 
saturday morning, until breezy southerly winds return later in the
weekend. southerly gales are possible over the north half 
sunday into monday morning.


lmz261-362-364-366-563-565-567-868-092115-
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-
853 am cdt thu apr 9 2026

sheboygan wi to pentwater mi north...

.rest of today...southwest winds 10 to 20 kt becoming west 15 to
25 kt, then becoming southwest 10 to 20 kt late. waves 4 to 6 ft
occasionally to 8 ft subsiding to 2 to 4 ft. 
.tonight...south winds 10 to 15 kt backing to northeast. slight
chance of rain and snow showers overnight. waves 1 to 3 ft
subsiding to 1 to 2 ft. 
.friday...north winds 5 to 10 kt increasing to 10 to 15 kt. waves
1 to 2 ft. 
.friday night...northeast winds 10 to 15 kt veering to south.
waves 1 ft or less. 
.saturday...south winds 5 to 10 kt increasing to 10 to 15 kt.
waves 1 to 2 ft. 
.saturday night...southeast winds 10 to 15 kt increasing to 15 to
25 kt. chance of rain showers. waves 1 to 3 ft building to 4 to
7 ft occasionally to 9 ft. 
.sunday...south winds to 30 kt increasing to gales to 35 kt. rain
showers. waves 6 to 9 ft occasionally to 12 ft building to 8 to
11 ft occasionally to 14 ft. 
.monday...southwest gales to 35 kt diminishing to 15 to 25 kt.
chance of rain showers. waves 8 to 12 ft occasionally to 16 ft
subsiding to 6 to 9 ft occasionally to 12 ft.  

$$

fzus63 kmkx 091353
glflm 
expires:202604092115;;083584

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
853 am cdt thu apr 9 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...

low pressure around 29.7 inches over far western ontario will
track north of lake superior through late morning. the winds
behind the associated front dropping down lake michigan early this
morning will be westerly and light. the gale warning will be
allowed to expire at 4 am.

light and variable winds will prevail this afternoon through 
saturday morning, until breezy southerly winds return later in the
weekend. southerly gales are possible over the north half 
sunday into monday morning.


lmz080-669-671-673-675-777-779-870-872-874-876-878-092115-
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-
853 am cdt thu apr 9 2026

sheboygan wi to pentwater mi south...

.rest of today...southwest winds 10 to 15 kt backing to southeast
5 to 10 kt. waves 4 to 6 ft occasionally to 8 ft subsiding to
1 to 3 ft. 
.tonight...east winds 5 to 10 kt becoming northeast 10 to 15 kt,
then increasing to 10 to 20 kt late. chance of rain showers and
slight chance of thunderstorms in the evening, then rain showers
overnight. waves 1 to 2 ft. 
.friday...north winds 10 to 20 kt. chance of rain showers in the
morning. waves 1 to 2 ft. 
.friday night...northeast winds 10 to 15 kt diminishing to 5 to
10 kt. waves 1 to 2 ft. 
.saturday...southeast winds 5 to 10 kt increasing to 10 to 15 kt.
waves 1 to 2 ft. 
.saturday night...southeast winds 10 to 20 kt increasing to 15 to
25 kt. chance of rain showers. waves 1 to 3 ft building to 4 to
7 ft occasionally to 9 ft. 
.sunday...south winds to 30 kt. chance of rain showers. waves
6 to 9 ft occasionally to 12 ft building to 7 to 10 ft
occasionally to 13 ft. 
.monday...southwest winds to 30 kt becoming south 15 to 25 kt.
chance of showers. waves 8 to 11 ft occasionally to 14 ft
subsiding to 6 to 9 ft occasionally to 12 ft.  

$$

fzus63 kmqt 091401
glfls 
expires:202604092000;;083858

open lake forecast for lake superior
national weather service marquette mi
1000 am edt thu apr 9 2026

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

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

.synopsis...

a 29.6 inch low over far northeastern ontario this morning reaches 
james bay by this afternoon as a 30.2 inch high pressure builds into 
the upper great lakes. the high builds to 30.5 inches over the lower 
great lakes by saturday. on sunday, a 29.3 inch low pressure lifts 
through the northern plains while the 30.5 inch high pushes off of 
the eastern seaboard into the atlantic. this low pushes east through 
the upper great lakes sunday night before continuing into northern 
quebec monday. another low will take shape over the central plains 
on monday, deepening to 29.5 inches on tuesday with a weak 29.8 inch 
trough extending through the upper great lakes.



lsz162-092000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 am edt thu apr 9 2026 /900 am cdt thu apr 9 2026/

.rest of today...west winds 20 to 30 knots diminishing to 10 to
20 knots. waves 3 to 5 feet occasionally to 7 feet subsiding to
calm to 2 feet. 
.tonight...west winds 5 to 15 knots veering northwest after
midnight. waves calm to 2 feet. 
.friday...west winds 5 to 15 knots backing southwest in the
afternoon. waves calm to 2 feet. 
.friday night...west winds 5 to 15 knots. waves calm to 2 feet. 
.saturday...south winds 5 to 15 knots backing east by mid
afternoon. a slight chance of rain showers by mid afternoon.
waves calm to 2 feet. 
.saturday night...east winds 10 to 20 knots. rain showers. waves
building to 2 to 4 feet. 
.sunday...east winds 10 to 20 knots veering west. rain showers,
then a chance of rain showers. waves subsiding to 1 to 3 feet,
then building to 2 to 4 feet. 
.monday...northeast winds 10 to 20 knots increasing to 20 to
30 knots. a chance of rain showers, then rain showers, possibly
mixed with snow. waves subsiding to calm to 2 feet, then building
to 6 to 9 feet occasionally to 11 feet. 

$$

fzus63 kmqt 091401
glfls 
expires:202604092000;;083859

open lake forecast for lake superior
national weather service marquette mi
1000 am edt thu apr 9 2026

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

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

.synopsis...

a 29.6 inch low over far northeastern ontario this morning reaches 
james bay by this afternoon as a 30.2 inch high pressure builds into 
the upper great lakes. the high builds to 30.5 inches over the lower 
great lakes by saturday. on sunday, a 29.3 inch low pressure lifts 
through the northern plains while the 30.5 inch high pushes off of 
the eastern seaboard into the atlantic. this low pushes east through 
the upper great lakes sunday night before continuing into northern 
quebec monday. another low will take shape over the central plains 
on monday, deepening to 29.5 inches on tuesday with a weak 29.8 inch 
trough extending through the upper great lakes.



lsz263-092000-
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-
1000 am edt thu apr 9 2026

.rest of today...west winds 20 to 30 knots diminishing to 15 to
25 knots late. waves 6 to 9 feet occasionally to 11 feet
subsiding to 3 to 5 feet occasionally to 7 feet. 
.tonight...west winds 5 to 15 knots becoming northwest less than
10 knots after midnight. waves subsiding to calm to 2 feet. 
.friday...west winds 5 to 15 knots backing southwest late. waves
calm to 2 feet. 
.friday night...southwest winds 5 to 15 knots diminishing to less
than 10 knots after midnight. waves calm to 2 feet. 
.saturday...south winds less than 10 knots becoming east 5 to
15 knots by mid afternoon. a slight chance of rain showers by mid
afternoon. waves calm to 2 feet. 
.saturday night...southeast winds 10 to 20 knots increasing to
15 to 25 knots after midnight. rain showers. waves building to
3 to 5 feet occasionally to 7 feet. 
.sunday...south winds 15 to 25 knots veering southwest. rain
showers. a chance of thunderstorms. a chance of rain showers.
waves building to 3 to 6 feet occasionally to 8 feet. 
.monday...northeast winds 10 to 20 knots increasing to 20 to
30 knots. rain showers, possibly mixed with snow. waves subsiding
to 1 to 3 feet, then building to 6 to 9 feet occasionally to
11 feet. 

$$

fzus63 kmqt 091401
glfls 
expires:202604092000;;083860

open lake forecast for lake superior
national weather service marquette mi
1000 am edt thu apr 9 2026

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

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

.synopsis...

a 29.6 inch low over far northeastern ontario this morning reaches 
james bay by this afternoon as a 30.2 inch high pressure builds into 
the upper great lakes. the high builds to 30.5 inches over the lower 
great lakes by saturday. on sunday, a 29.3 inch low pressure lifts 
through the northern plains while the 30.5 inch high pushes off of 
the eastern seaboard into the atlantic. this low pushes east through 
the upper great lakes sunday night before continuing into northern 
quebec monday. another low will take shape over the central plains 
on monday, deepening to 29.5 inches on tuesday with a weak 29.8 inch 
trough extending through the upper great lakes.



lsz264-092000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
1000 am edt thu apr 9 2026

.rest of today...west winds 20 to 30 knots diminishing to 15 to
25 knots late. waves 6 to 9 feet occasionally to 11 feet
subsiding to 3 to 5 feet occasionally to 7 feet. 
.tonight...west winds 5 to 15 knots becoming northwest less than
10 knots after midnight, then backing west late. waves subsiding
to calm to 2 feet. 
.friday...west winds 5 to 15 knots. waves calm to 2 feet. 
.friday night...west winds 5 to 15 knots. waves calm to 2 feet. 
.saturday...southwest winds less than 10 knots becoming southeast
5 to 15 knots by mid afternoon. waves calm to 2 feet. 
.saturday night...southeast winds 15 to 25 knots increasing to
20 to 30 knots after midnight. a chance of rain showers through
midnight, then rain showers after midnight. waves building to
4 to 7 feet occasionally to 9 feet. 
.sunday...southeast winds 20 to 30 knots becoming southwest 15 to
25 knots. rain showers and a chance of thunderstorms. waves
building to 5 to 8 feet occasionally to 10 feet, then subsiding
to 3 to 6 feet occasionally to 8 feet. 
.monday...northwest winds 15 to 25 knots becoming northeast 20 to
30 knots. a chance of rain showers. a chance of snow showers.
waves subsiding to 1 to 3 feet, then building to 6 to 9 feet
occasionally to 11 feet. 

$$

fzus63 kmqt 091401
glfls 
expires:202604092000;;083861

open lake forecast for lake superior
national weather service marquette mi
1000 am edt thu apr 9 2026

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

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

.synopsis...

a 29.6 inch low over far northeastern ontario this morning reaches 
james bay by this afternoon as a 30.2 inch high pressure builds into 
the upper great lakes. the high builds to 30.5 inches over the lower 
great lakes by saturday. on sunday, a 29.3 inch low pressure lifts 
through the northern plains while the 30.5 inch high pushes off of 
the eastern seaboard into the atlantic. this low pushes east through 
the upper great lakes sunday night before continuing into northern 
quebec monday. another low will take shape over the central plains 
on monday, deepening to 29.5 inches on tuesday with a weak 29.8 inch 
trough extending through the upper great lakes.



lsz265-092000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
1000 am edt thu apr 9 2026

.rest of today...west winds 20 to 30 knots diminishing to 15 to
25 knots late. waves 3 to 6 feet occasionally to 8 feet subsiding
to 1 to 3 feet. 
.tonight...west winds 10 to 20 knots diminishing to 5 to 15 knots
after midnight. waves subsiding to calm to 2 feet. 
.friday...west winds 5 to 15 knots increasing to 10 to 20 knots
in the afternoon. waves calm to 2 feet. 
.friday night...west winds 10 to 20 knots backing southwest after
midnight. waves calm to 2 feet. 
.saturday...southwest winds 5 to 15 knots becoming southeast
10 to 20 knots by mid afternoon. waves calm to 2 feet. 
.saturday night...southeast winds 15 to 25 knots increasing to
20 to 30 knots after midnight. a chance of rain showers through
midnight, then rain showers after midnight. waves building to
4 to 7 feet occasionally to 9 feet. 
.sunday...south gales to 35 knots becoming southwest 20 to
30 knots. rain showers and a chance of thunderstorms. waves
building to 5 to 8 feet occasionally to 10 feet, then subsiding
to 3 to 5 feet occasionally to 7 feet. 
.monday...west winds 15 to 25 knots becoming northeast 20 to
30 knots. rain showers likely. waves subsiding to calm to 2 feet,
then building to 5 to 8 feet occasionally to 10 feet. 

$$

fzus63 kmqt 091401
glfls 
expires:202604092000;;083862

open lake forecast for lake superior
national weather service marquette mi
1000 am edt thu apr 9 2026

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

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

.synopsis...

a 29.6 inch low over far northeastern ontario this morning reaches 
james bay by this afternoon as a 30.2 inch high pressure builds into 
the upper great lakes. the high builds to 30.5 inches over the lower 
great lakes by saturday. on sunday, a 29.3 inch low pressure lifts 
through the northern plains while the 30.5 inch high pushes off of 
the eastern seaboard into the atlantic. this low pushes east through 
the upper great lakes sunday night before continuing into northern 
quebec monday. another low will take shape over the central plains 
on monday, deepening to 29.5 inches on tuesday with a weak 29.8 inch 
trough extending through the upper great lakes.



lsz266-092000-
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-
1000 am edt thu apr 9 2026

.rest of today...west winds 20 to 30 knots. waves 5 to 8 feet
occasionally to 10 feet subsiding to 3 to 6 feet occasionally to
8 feet. 
.tonight...west winds 10 to 20 knots becoming northwest 5 to
15 knots after midnight, then backing west late. waves subsiding
to calm to 2 feet. 
.friday...west winds 5 to 15 knots increasing to 10 to 20 knots
in the afternoon. waves calm to 2 feet. 
.friday night...west winds 10 to 20 knots becoming southwest 5 to
15 knots after midnight. waves calm to 2 feet. 
.saturday...southwest winds 5 to 15 knots backing southeast by
mid afternoon. waves calm to 2 feet. 
.saturday night...southeast winds 15 to 25 knots increasing to
gales to 35 knots after midnight. a chance of rain showers
through midnight, then rain showers likely after midnight. waves
building to 4 to 7 feet occasionally to 9 feet. 
.sunday...south gales to 35 knots veering southwest. rain
showers. a chance of rain showers. waves building to 5 to 9 feet
occasionally to 11 feet. 
.monday...west winds 15 to 25 knots becoming northeast 20 to
30 knots. rain showers likely, possibly mixed with snow showers.
waves subsiding to 2 to 4 feet, then building to 5 to 8 feet
occasionally to 10 feet. 

$$

fzus63 kmqt 091401
glfls 
expires:202604092000;;083863

open lake forecast for lake superior
national weather service marquette mi
1000 am edt thu apr 9 2026

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

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

.synopsis...

a 29.6 inch low over far northeastern ontario this morning reaches 
james bay by this afternoon as a 30.2 inch high pressure builds into 
the upper great lakes. the high builds to 30.5 inches over the lower 
great lakes by saturday. on sunday, a 29.3 inch low pressure lifts 
through the northern plains while the 30.5 inch high pushes off of 
the eastern seaboard into the atlantic. this low pushes east through 
the upper great lakes sunday night before continuing into northern 
quebec monday. another low will take shape over the central plains 
on monday, deepening to 29.5 inches on tuesday with a weak 29.8 inch 
trough extending through the upper great lakes.



lsz267-092000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
1000 am edt thu apr 9 2026

.rest of today...west winds to 30 knots with a few gale force
gusts to 35 knots possible diminishing to 20 to 30 knots late.
waves 5 to 9 feet occasionally to 11 feet, then subsiding to 4 to
7 feet occasionally to 9 feet. 
.tonight...northwest winds 5 to 15 knots. waves subsiding to calm
to 2 feet. 
.friday...west winds 5 to 15 knots increasing to 10 to 20 knots
late. waves calm to 2 feet. 
.friday night...west winds 5 to 15 knots backing southwest after
midnight. waves calm to 2 feet. 
.saturday...southwest winds 5 to 15 knots backing southeast by
mid afternoon. waves calm to 2 feet. 
.saturday night...southeast winds 10 to 20 knots increasing to
20 to 30 knots after midnight. rain showers likely after
midnight. waves building to 3 to 6 feet occasionally to 8 feet. 
.sunday...southeast gales to 35 knots veering southwest. rain
showers. waves building to 4 to 8 feet occasionally to 10 feet. 
.monday...west winds 15 to 25 knots becoming northeast 20 to
30 knots. a chance of rain showers, then rain showers likely.
waves subsiding to 2 to 4 feet, then building to 4 to 7 feet
occasionally to 9 feet. 

$$