fzus63 kdtx 311944
glflh 
expires:202608010345;;405149

open lake forecast for lake huron
national weather service detroit/pontiac mi
344 pm edt fri jul 31 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...high pressure, 30.30 inches, will continue to bring
quieter weather to eastern portions of the great lakes region.
low pressure, averaging around 29.90 inches, out over the upper
mississippi river valley today will track eastward towards the
ohio valley through the weekend. this brings rain and isolated
thunderstorm chances to the great lakes friday night into sunday
along with elevated winds and waves into saginaw bay and the
thumb nearshores.


lhz361-010345-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
344 pm edt fri jul 31 2026

.tonight...southwest winds 5 to 10 knots veering to the northwest
after midnight. showers likely and a chance of thunderstorms in
the evening...then showers likely after midnight. waves 2 feet or
less. 
.saturday...light and variable winds. a chance of showers in the
morning...then showers likely in the afternoon. waves 2 feet or
less. 
.saturday night...light and variable winds becoming northeast
10 to 15 knots. a chance of showers. waves 2 feet or less. 
.sunday...northeast winds 10 to 15 knots decreasing to 5 to
10 knots early in the afternoon. waves 1 to 3 feet. 
.sunday night...light and variable winds becoming northeast 5 to
10 knots in the late evening and overnight. waves 2 feet or less.
.monday...north winds 5 to 10 knots in the morning becoming light
and variable. waves 2 feet or less. 
.tuesday...east winds 5 to 10 knots early in the morning veering
to the southeast...then backing to the east early in the evening
becoming light and variable. waves 2 feet or less. 
.wednesday...light and variable winds becoming northwest 5 to
10 knots by midnight. waves 2 feet or less. 


$$

fzus63 kdtx 311944
glflh 
expires:202608010345;;405150

open lake forecast for lake huron
national weather service detroit/pontiac mi
344 pm edt fri jul 31 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...high pressure, 30.30 inches, will continue to bring
quieter weather to eastern portions of the great lakes region.
low pressure, averaging around 29.90 inches, out over the upper
mississippi river valley today will track eastward towards the
ohio valley through the weekend. this brings rain and isolated
thunderstorm chances to the great lakes friday night into sunday
along with elevated winds and waves into saginaw bay and the
thumb nearshores.


lhz362-363-010345-
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-
344 pm edt fri jul 31 2026

.tonight...light and variable winds. a chance of showers. waves
2 feet or less. 
.saturday...light and variable winds becoming north 5 to 10 knots
late in the afternoon. a chance of showers in the morning...then
showers likely in the afternoon. waves 2 feet or less. 
.saturday night...northeast winds 5 to 10 knots increasing to
10 to 15 knots after midnight. showers likely in the evening...
then a chance of showers after midnight. waves 2 feet or less. 
.sunday...northeast winds 10 to 15 knots increasing to 15 to
20 knots with gusts to around 30 knots in the late morning and
afternoon. a chance of showers. waves 3 to 5 feet. 
.sunday night...north winds 10 to 15 knots. a chance of showers
in the evening. waves 3 to 5 feet subsiding to 1 to 3 feet in the
late evening and overnight. 
.monday...north winds 10 to 15 knots decreasing to 5 to 10 knots.
waves 2 feet or less. 
.tuesday...northeast winds 5 to 10 knots early in the morning
becoming light and variable...then becoming northeast 5 to
10 knots early in the evening veering to the east. waves 2 feet
or less. 
.wednesday...light and variable winds becoming east 5 to 10 knots
by midnight. waves 2 feet or less. 


$$

fzus63 kdtx 311944
glflh 
expires:202608010345;;405151

open lake forecast for lake huron
national weather service detroit/pontiac mi
344 pm edt fri jul 31 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...high pressure, 30.30 inches, will continue to bring
quieter weather to eastern portions of the great lakes region.
low pressure, averaging around 29.90 inches, out over the upper
mississippi river valley today will track eastward towards the
ohio valley through the weekend. this brings rain and isolated
thunderstorm chances to the great lakes friday night into sunday
along with elevated winds and waves into saginaw bay and the
thumb nearshores.


lhz462>464-010345-
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-
344 pm edt fri jul 31 2026

.tonight...southeast winds 5 to 10 knots backing to the north
after midnight. waves 2 feet or less. 
.saturday...north winds 5 to 10 knots. a chance of showers. waves
2 feet or less. 
.saturday night...northeast winds 10 to 15 knots. a chance of
showers in the evening...then showers likely after midnight.
waves 1 to 3 feet. 
.sunday...northeast winds 10 to 15 knots becoming north 15 to
20 knots with gusts to around 30 knots early in the afternoon.
showers likely in the morning...then a chance of showers in the
afternoon. waves 1 to 3 feet building to 3 to 5 feet in the late
morning and afternoon. 
.sunday night...north winds 15 to 20 knots decreasing to 10 to
15 knots after midnight. a chance of showers in the evening.
waves 3 to 5 feet. 
.monday...north winds 10 to 15 knots decreasing to 5 to 10 knots
late in the evening. waves 1 to 3 feet. 
.tuesday...northeast winds 5 to 10 knots veering to the east by
midnight. waves 2 feet or less. 
.wednesday...south winds 5 to 10 knots early in the morning
becoming light and variable...then becoming east 5 to 10 knots .
a chance of showers by midnight. waves 2 feet or less. 


$$

fzus63 kmkx 312031 aaa
glflm 
expires:202608010315;;407219

open lake forecast for lake michigan...updated
national weather service milwaukee/sullivan wi
331 pm cdt fri jul 31 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 will continue to track
southeastward across ia this evening and deepen to around 29.5 
inches as it pushes into il overnight into saturday. will see 
southeasterly winds across the lake shift more easterly through 
the evening and increase as the low pressure slowly moves through 
the region. then looking at stronger northeasterly winds with 
gusts up to 25-30 knots across southern half of lake michigan 
through the day saturday and lingering into sunday as the low 
pressure slowly tracks over the eastern great lakes. isolated and 
infrequent gusts to gale-force will be possible at times this 
weekend on the backside of the deepening low pressure. winds then 
diminish into the start of next week as the low pressure pushes 
further east while high pressure begins to build across the upper 
great lakes region monday and tuesday. this will bring lighter and
more variable winds to lake michigan before southerly winds 
return by midweek as another low pressure system develops over the
plains.


lmz080-669-671-673-675-777-779-870-872-874-876-878-010315-
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-
331 pm cdt fri jul 31 2026

sheboygan wi to pentwater mi south...

.tonight...southeast winds 10 to 20 kt becoming east late this
evening, then becoming northeast 15 to 25 kt after midnight
becoming east to 30 kt late. showers likely with slight chance of
thunderstorms this evening, then showers and slight chance of
thunderstorms overnight. waves 2 to 4 ft building to 5 to 8 ft
occasionally to 10 ft. 
.saturday...east winds to 30 kt becoming northeast. showers and
slight chance of thunderstorms in the morning, then showers
likely with slight chance of thunderstorms in the afternoon.
waves 6 to 9 ft occasionally to 12 ft. 
.saturday night...northeast winds to 30 kt. chance of showers in
the evening. waves 6 to 9 ft occasionally to 12 ft. 
.sunday...north winds to 30 kt. waves 6 to 9 ft occasionally to
12 ft building to 8 to 11 ft occasionally to 14 ft. 
.sunday night...north winds to 30 kt becoming northeast 10 to
20 kt overnight. waves 7 to 10 ft occasionally to 13 ft subsiding
to 5 to 8 ft occasionally to 10 ft. 
.monday...northeast winds 10 to 15 kt becoming north 10 to 20 kt.
waves 3 to 5 ft subsiding to 2 to 4 ft. 
.monday night...northeast winds 10 to 20 kt becoming east 5 to
10 kt. waves 1 to 3 ft. 
.tuesday...east winds 5 to 10 kt veering to southwest 10 to
20 kt. waves 1 to 2 ft. 
.wednesday...southwest winds 10 to 15 kt becoming south. waves
1 to 2 ft.  

$$

fzus63 kmkx 312031 aaa
glflm 
expires:202608010315;;407218

open lake forecast for lake michigan...updated
national weather service milwaukee/sullivan wi
331 pm cdt fri jul 31 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 will continue to track
southeastward across ia this evening and deepen to around 29.5 
inches as it pushes into il overnight into saturday. will see 
southeasterly winds across the lake shift more easterly through 
the evening and increase as the low pressure slowly moves through 
the region. then looking at stronger northeasterly winds with 
gusts up to 25-30 knots across southern half of lake michigan 
through the day saturday and lingering into sunday as the low 
pressure slowly tracks over the eastern great lakes. isolated and 
infrequent gusts to gale-force will be possible at times this 
weekend on the backside of the deepening low pressure. winds then 
diminish into the start of next week as the low pressure pushes 
further east while high pressure begins to build across the upper 
great lakes region monday and tuesday. this will bring lighter and
more variable winds to lake michigan before southerly winds 
return by midweek as another low pressure system develops over the
plains.


lmz261-362-364-366-563-565-567-868-010315-
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-
331 pm cdt fri jul 31 2026

sheboygan wi to pentwater mi north...

.tonight...northwest winds 10 to 15 kt becoming north 10 to 20 kt
late this evening, then becoming northeast 15 to 25 kt overnight.
showers likely with slight chance of thunderstorms this evening,
then chance of showers overnight. waves 1 to 2 ft building to
3 to 5 ft. 
.saturday...northeast winds 15 to 25 kt. chance of showers. waves
4 to 6 ft occasionally to 8 ft. 
.saturday night...northeast winds 15 to 25 kt. waves 4 to 7 ft
occasionally to 9 ft. 
.sunday...northeast winds to 30 kt. waves 5 to 8 ft occasionally
to 10 ft. 
.sunday night...north winds to 30 kt becoming northeast 10 to
20 kt overnight. waves 4 to 7 ft occasionally to 9 ft subsiding
to 2 to 4 ft. 
.monday...northeast winds 10 to 15 kt becoming north 10 to 20 kt.
waves 1 to 3 ft. 
.monday night...east winds 10 to 20 kt becoming southeast 5 to
10 kt. waves 1 to 2 ft. 
.tuesday...south winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 2 ft. 
.wednesday...west winds 10 to 15 kt becoming southwest 10 to
20 kt. waves 1 to 2 ft.  

$$

fzus63 kmqt 312001
glfls 
expires:202608010800;;405536

open lake forecast for lake superior
national weather service marquette mi
401 pm edt fri jul 31 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 pressure present over northern quebec this afternoon 
is dragging a 29.9 inch trough over the lake. troughing lingers over 
the lake into early saturday morning as the parent low continues to 
move northward through quebec. a 30.0 inch high will build over 
james bay on saturday, extending a weak 29.9 inch ridge over the 
lake. ridging over the lake builds further to 30.0 inches on sunday, 
lingering into monday. a weak trough of 29.9 inches then moves 
through the area on tuesday followed by 30.0 inch ridging on 
wednesday.




lsz264-010800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
401 pm edt fri jul 31 2026

.late this afternoon...west winds 5 to 15 knots. patchy fog and
smoke. a slight chance of showers. waves calm to 2 feet. 
.tonight...west winds 5 to 15 knots veering north late. patchy
fog. waves calm to 2 feet. 
.saturday...northeast winds 5 to 15 knots. patchy fog through
early afternoon. waves calm to 2 feet. 
.saturday night...north winds 5 to 15 knots veering northeast
after midnight. waves calm to 2 feet. 
.sunday...northeast winds 5 to 15 knots backing north by mid
afternoon. waves calm to 2 feet. 
.sunday night...northwest winds 5 to 15 knots becoming southeast
less than 10 knots after midnight. waves calm to 2 feet. 
.monday...southeast winds less than 10 knots increasing to 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.monday night...southeast winds 5 to 15 knots becoming south
10 to 20 knots after midnight. waves calm to 2 feet. 
.tuesday...southwest winds 5 to 15 knots veering northwest. waves
building to 1 to 3 feet, then subsiding to calm to 2 feet. 
.wednesday...west winds 5 to 15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 312001
glfls 
expires:202608010800;;405537

open lake forecast for lake superior
national weather service marquette mi
401 pm edt fri jul 31 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 pressure present over northern quebec this afternoon 
is dragging a 29.9 inch trough over the lake. troughing lingers over 
the lake into early saturday morning as the parent low continues to 
move northward through quebec. a 30.0 inch high will build over 
james bay on saturday, extending a weak 29.9 inch ridge over the 
lake. ridging over the lake builds further to 30.0 inches on sunday, 
lingering into monday. a weak trough of 29.9 inches then moves 
through the area on tuesday followed by 30.0 inch ridging on 
wednesday.




lsz265-010800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
401 pm edt fri jul 31 2026

.late this afternoon...west winds 5 to 15 knots. patchy fog. a
chance of showers and a slight chance of thunderstorms. waves
calm to 2 feet. 
.tonight...southwest winds 5 to 15 knots veering west after
midnight, then becoming northwest 10 to 20 knots late. a chance
of showers and a slight chance of thunderstorms through midnight.
patchy fog and smoke. waves calm to 2 feet. 
.saturday...north winds 10 to 20 knots. patchy fog through early
afternoon. a slight chance of showers. waves calm to 2 feet. 
.saturday night...north winds 10 to 20 knots veering northeast
late. waves calm to 2 feet. 
.sunday...northeast winds 10 to 20 knots becoming north 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.sunday night...north winds 5 to 15 knots veering east after
midnight. waves calm to 2 feet. 
.monday...southeast winds 5 to 15 knots becoming east 10 to
20 knots by mid afternoon. waves calm to 2 feet. 
.monday night...southeast winds 10 to 20 knots veering south
after midnight. waves calm to 2 feet. 
.tuesday...south winds 10 to 20 knots veering west. a chance of
showers. waves calm to 2 feet. 
.wednesday...northwest winds 10 to 20 knots backing west. waves
calm to 2 feet. 

$$

fzus63 kmqt 312001
glfls 
expires:202608010800;;405538

open lake forecast for lake superior
national weather service marquette mi
401 pm edt fri jul 31 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 pressure present over northern quebec this afternoon 
is dragging a 29.9 inch trough over the lake. troughing lingers over 
the lake into early saturday morning as the parent low continues to 
move northward through quebec. a 30.0 inch high will build over 
james bay on saturday, extending a weak 29.9 inch ridge over the 
lake. ridging over the lake builds further to 30.0 inches on sunday, 
lingering into monday. a weak trough of 29.9 inches then moves 
through the area on tuesday followed by 30.0 inch ridging on 
wednesday.




lsz266-010800-
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 pm edt fri jul 31 2026

.late this afternoon...west winds 5 to 15 knots. patchy fog. a
chance of showers and a slight chance of thunderstorms. waves
calm to 2 feet. 
.tonight...west winds 5 to 15 knots veering northwest late.
patchy fog. a slight chance of thunderstorms through midnight. a
chance of showers. waves calm to 2 feet. 
.saturday...north winds 5 to 15 knots becoming northeast 10 to
20 knots in the afternoon, then backing north late. patchy fog
through early afternoon. a slight chance of showers. waves calm
to 2 feet. 
.saturday night...north winds 10 to 20 knots veering northeast
after midnight. waves building to 1 to 3 feet. 
.sunday...northeast winds 10 to 20 knots becoming north 5 to
15 knots by mid afternoon. waves subsiding to calm to 2 feet. 
.sunday night...north winds 5 to 15 knots veering east after
midnight. waves calm to 2 feet. 
.monday...southeast winds 5 to 15 knots backing east by mid
afternoon. waves calm to 2 feet. 
.monday night...southeast winds 10 to 20 knots veering south
after midnight. waves building to 1 to 3 feet. 
.tuesday...south winds 5 to 15 knots becoming west 10 to
20 knots. a chance of showers. waves subsiding to calm to 2 feet.
.wednesday...northwest winds 5 to 15 knots backing west. waves
calm to 2 feet. 

$$

fzus63 kmqt 312001
glfls 
expires:202608010800;;405539

open lake forecast for lake superior
national weather service marquette mi
401 pm edt fri jul 31 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 pressure present over northern quebec this afternoon 
is dragging a 29.9 inch trough over the lake. troughing lingers over 
the lake into early saturday morning as the parent low continues to 
move northward through quebec. a 30.0 inch high will build over 
james bay on saturday, extending a weak 29.9 inch ridge over the 
lake. ridging over the lake builds further to 30.0 inches on sunday, 
lingering into monday. a weak trough of 29.9 inches then moves 
through the area on tuesday followed by 30.0 inch ridging on 
wednesday.




lsz267-010800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
401 pm edt fri jul 31 2026

.late this afternoon...west winds 5 to 15 knots. patchy fog. a
chance of showers and a slight chance of thunderstorms. waves
calm to 2 feet. 
.tonight...west winds 5 to 15 knots veering northwest late. areas
of dense fog. a chance of showers and a slight chance of
thunderstorms. waves calm to 2 feet. 
.saturday...north winds 5 to 15 knots veering northeast in the
afternoon, then becoming north 10 to 20 knots late. patchy fog
through early afternoon. a chance of showers and a slight chance
of thunderstorms. waves calm to 2 feet. 
.saturday night...northeast winds 10 to 20 knots. waves building
to 1 to 3 feet. 
.sunday...north winds 10 to 20 knots. waves subsiding to calm to
2 feet. 
.sunday night...north winds 5 to 15 knots veering northeast after
midnight. waves calm to 2 feet. 
.monday...northeast winds 5 to 15 knots backing north by mid
afternoon. waves calm to 2 feet. 
.monday night...southeast winds 5 to 15 knots veering south after
midnight. waves calm to 2 feet. 
.tuesday...southeast winds 5 to 15 knots veering south. a chance
of showers. waves calm to 2 feet. 
.wednesday...west winds 5 to 15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 312001
glfls 
expires:202608010800;;405534

open lake forecast for lake superior
national weather service marquette mi
401 pm edt fri jul 31 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 pressure present over northern quebec this afternoon 
is dragging a 29.9 inch trough over the lake. troughing lingers over 
the lake into early saturday morning as the parent low continues to 
move northward through quebec. a 30.0 inch high will build over 
james bay on saturday, extending a weak 29.9 inch ridge over the 
lake. ridging over the lake builds further to 30.0 inches on sunday, 
lingering into monday. a weak trough of 29.9 inches then moves 
through the area on tuesday followed by 30.0 inch ridging on 
wednesday.




lsz162-010800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt fri jul 31 2026 /301 pm cdt fri jul 31 2026/

.late this afternoon...southwest winds 5 to 15 knots. patchy fog
and smoke. a slight chance of showers and thunderstorms. waves
calm to 2 feet. 
.tonight...southwest winds 5 to 15 knots veering west after
midnight, then veering north late. a slight chance of showers and
thunderstorms through midnight. patchy smoke. patchy fog after
midnight. waves calm to 2 feet. 
.saturday...northeast winds 5 to 15 knots veering east in the
afternoon, then backing northeast late. a slight chance of
showers by mid afternoon. waves calm to 2 feet. 
.saturday night...north winds 5 to 15 knots veering northeast
late. waves calm to 2 feet. 
.sunday...northeast winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. waves calm to 2 feet. 
.sunday night...northeast winds 5 to 15 knots veering east after
midnight. waves calm to 2 feet. 
.monday...east winds 5 to 15 knots. waves calm to 2 feet. 
.monday night...northeast winds 5 to 15 knots veering southwest
after midnight. a chance of showers after midnight. waves calm to
2 feet. 
.tuesday...southwest winds 5 to 15 knots veering northwest. waves
calm to 2 feet. 
.wednesday...southwest winds 5 to 15 knots veering northwest.
waves calm to 2 feet. 

$$

fzus63 kmqt 312001
glfls 
expires:202608010800;;405535

open lake forecast for lake superior
national weather service marquette mi
401 pm edt fri jul 31 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 pressure present over northern quebec this afternoon 
is dragging a 29.9 inch trough over the lake. troughing lingers over 
the lake into early saturday morning as the parent low continues to 
move northward through quebec. a 30.0 inch high will build over 
james bay on saturday, extending a weak 29.9 inch ridge over the 
lake. ridging over the lake builds further to 30.0 inches on sunday, 
lingering into monday. a weak trough of 29.9 inches then moves 
through the area on tuesday followed by 30.0 inch ridging on 
wednesday.




lsz263-010800-
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 pm edt fri jul 31 2026

.late this afternoon...southwest winds 5 to 15 knots. patchy fog
and smoke. a slight chance of showers and thunderstorms. waves
calm to 2 feet. 
.tonight...southwest winds 5 to 15 knots veering west after
midnight, then veering north late. a slight chance of showers and
thunderstorms through midnight. patchy fog and smoke. waves calm
to 2 feet. 
.saturday...northeast winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. waves calm to 2 feet. 
.saturday night...north winds 5 to 15 knots veering northeast
after midnight. waves calm to 2 feet. 
.sunday...northeast winds 5 to 15 knots. waves calm to 2 feet. 
.sunday night...east winds 5 to 15 knots becoming southeast less
than 10 knots after midnight. waves calm to 2 feet. 
.monday...southeast winds less than 10 knots becoming east 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.monday night...southeast winds 10 to 20 knots veering south
after midnight. waves building to 1 to 3 feet. 
.tuesday...southwest winds 5 to 15 knots veering northwest. waves
subsiding to calm to 2 feet. 
.wednesday...southwest winds 10 to 20 knots becoming west 5 to
15 knots. waves calm to 2 feet. 

$$