fzus63 kdtx 151939
glflh 
expires:202507160345;;497733

open lake forecast for lake huron
national weather service detroit/pontiac mi
339 pm edt tue jul 15 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...a hybrid cold front and low pressure trough, averaging
29.80 inches, moves into the great lakes wednesday and thursday
which brings showers and thunderstorms to the marine zones.
strong to severe thunderstorms will be possible wednesday
afternoon and evening. !-- not sent--!


lhz361-362-160345-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
lake huron from presque isle light to sturgeon point mi beyond
5nm off shore-
339 pm edt tue jul 15 2025

.tonight...south-southeast winds around 15 knots with gusts to 20
knots decreasing to 5 to 10 knots after midnight. waves 1 to 3 
feet.
.wednesday...south winds 5 to 10 knots backing to the east late
in the afternoon. a chance of showers and thunderstorms in the
afternoon. some thunderstorms may produce heavy rainfall in the
afternoon. waves 2 feet or less. 
.wednesday night...northeast winds 5 to 10 knots. showers likely
and a chance of thunderstorms. some thunderstorms may produce
heavy rainfall in the evening. waves 2 feet or less. 
.thursday...north winds 10 to 15 knots backing to the northwest
in the late morning and afternoon. a chance of showers. waves
1 to 3 feet building to 2 to 4 feet early in the afternoon. 
.thursday night...north winds 10 to 15 knots decreasing to 5 to
10 knots in the late evening and overnight. waves 2 to 4 feet
subsiding to 1 to 3 feet in the late evening and overnight. 
.friday...north winds 5 to 10 knots in the morning becoming light
and variable...then becoming southeast 5 to 10 knots late in the
evening. waves 2 feet or less. 
.saturday...south winds 5 to 10 knots backing to the east until
early morning. a chance of showers early in the evening. waves
2 feet or less. 
.sunday...northeast winds 5 to 10 knots. waves 2 feet or less. 


$$

fzus63 kdtx 151939
glflh 
expires:202507160345;;497735

open lake forecast for lake huron
national weather service detroit/pontiac mi
339 pm edt tue jul 15 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...a hybrid cold front and low pressure trough, averaging
29.80 inches, moves into the great lakes wednesday and thursday
which brings showers and thunderstorms to the marine zones.
strong to severe thunderstorms will be possible wednesday
afternoon and evening. !-- not sent--!


lhz462>464-160345-
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-
339 pm edt tue jul 15 2025

.tonight...south winds 5 to 10 knots. waves 2 feet or less. 
.wednesday...south winds 5 to 10 knots. a chance of showers and
thunderstorms in the afternoon. some thunderstorms may produce
heavy rainfall in the afternoon. waves 2 feet or less. 
.wednesday night...south winds 5 to 10 knots. a chance of showers
and thunderstorms. some thunderstorms may produce heavy rainfall
in the evening. waves 2 feet or less. 
.thursday...south winds 5 to 10 knots becoming west 10 to
15 knots in the late morning and early afternoon...then veering
to the northwest early in the afternoon. a chance of showers.
waves 1 to 3 feet building to 2 to 4 feet early in the afternoon.
.thursday night...north winds 15 to 20 knots decreasing to 10 to
15 knots in the late evening and overnight. waves 2 to 4 feet. 
.friday...northeast winds 10 to 15 knots decreasing to 5 to
10 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.saturday...southeast winds 5 to 10 knots. a chance of showers
until early morning. waves 2 feet or less. 
.sunday...northeast winds 5 to 10 knots backing to the north
until early morning. a chance of showers early in the morning.
waves 2 feet or less. 


$$

fzus63 kdtx 151939
glflh 
expires:202507160345;;497734

open lake forecast for lake huron
national weather service detroit/pontiac mi
339 pm edt tue jul 15 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...a hybrid cold front and low pressure trough, averaging
29.80 inches, moves into the great lakes wednesday and thursday
which brings showers and thunderstorms to the marine zones.
strong to severe thunderstorms will be possible wednesday
afternoon and evening. !-- not sent--!


lhz363-160345-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
339 pm edt tue jul 15 2025

.tonight...southeast winds 5 to 10 knots becoming south 10 to
15 knots in the late evening and overnight. waves 1 to 3 feet. 
.wednesday...south winds 5 to 10 knots backing to the southeast
late in the afternoon. a chance of showers in the afternoon.
waves 2 feet or less. 
.wednesday night...southeast winds 5 to 10 knots backing to the
east in the late evening and early morning...then veering to the
south after midnight. a chance of showers and thunderstorms. some
thunderstorms may produce heavy rainfall in the evening. waves
2 feet or less. 
.thursday...southwest winds 10 to 15 knots veering to the
northwest in the late morning and early afternoon...then
increasing to 15 to 20 knots early in the afternoon. a chance of
showers. waves 1 to 3 feet building to 2 to 4 feet early in the
afternoon. 
.thursday night...north winds 15 to 20 knots decreasing to 10 to
15 knots in the late evening and overnight. waves 2 to 4 feet. 
.friday...northeast winds 5 to 10 knots. waves 2 feet or less. 
.saturday...south winds 5 to 10 knots. a chance of showers until
early morning. waves 2 feet or less. 
.sunday...north winds 5 to 10 knots. a chance of showers early in
the morning. waves 2 feet or less. 


$$

fzus63 kdtx 151344
glflh 
expires:202507152145;;483520

open lake forecast for lake huron
national weather service detroit/pontiac mi
944 am edt tue jul 15 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...high pressure, 30.10 inches, departs into the eastern
great lakes today maintaining dry conditions. a hybrid cold front
and low pressure trough, averaging 29.80 inches, moves into the
great lakes wednesday and thursday which brings showers and
thunderstorms to the marine zones. strong to severe thunderstorms
will be possible wednesday afternoon and evening.


lhz362-363-152145-
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-
944 am edt tue jul 15 2025

.rest of today...light and variable winds becoming south 5 to
10 knots in the afternoon. waves 2 feet or less. 
.tonight...south winds 10 to 15 knots decreasing to 5 to 10 knots
early in the morning. waves 1 to 3 feet. 
.wednesday...south winds 5 to 10 knots backing to the southeast
early in the afternoon. a chance of showers in the afternoon.
waves 2 feet or less. 
.wednesday night...southeast winds 5 to 10 knots backing to the
northeast after midnight. a chance of showers and thunderstorms.
waves 2 feet or less. 
.thursday...west winds 10 to 15 knots veering to the north. a
chance of showers. waves 1 to 3 feet building to 2 to 4 feet. 
.friday...north winds 5 to 10 knots early in the morning becoming
light and variable. waves 2 feet or less. 
.saturday...east winds 5 to 10 knots veering to the southeast. a
chance of showers in the late evening and early morning. waves
2 feet or less. 


$$

fzus63 kdtx 151344
glflh 
expires:202507152145;;483519

open lake forecast for lake huron
national weather service detroit/pontiac mi
944 am edt tue jul 15 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...high pressure, 30.10 inches, departs into the eastern
great lakes today maintaining dry conditions. a hybrid cold front
and low pressure trough, averaging 29.80 inches, moves into the
great lakes wednesday and thursday which brings showers and
thunderstorms to the marine zones. strong to severe thunderstorms
will be possible wednesday afternoon and evening.


lhz361-152145-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
944 am edt tue jul 15 2025

.rest of today...southeast winds 5 to 10 knots. waves 2 feet or
less. 
.tonight...light and variable winds. waves 1 to 3 feet. 
.wednesday...light and variable winds becoming east 5 to 10 knots
early in the afternoon. a chance of showers in the afternoon.
waves 2 feet or less. 
.wednesday night...north winds 5 to 10 knots veering to the
northeast after midnight. a chance of showers and thunderstorms.
waves 2 feet or less. 
.thursday...north winds 10 to 15 knots decreasing to 5 to
10 knots late in the evening. a chance of showers. waves 1 to
3 feet. 
.friday...light and variable winds. waves 2 feet or less. 
.saturday...light and variable winds becoming south 5 to 10 knots
in the late morning and early afternoon...then backing to the
east until early morning. a chance of showers until early
morning. waves 2 feet or less. 


$$

fzus63 kmkx 151917
glflm 
expires:202507160330;;497260

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
217 pm cdt tue jul 15 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... 

a slow moving front will approach lake michigan from the 
northwest tonight as high pressure of 30.0 inches retreats east 
toward the east coast. low pressure of 29.7 inches will then 
approach lake michigan from the iowa/minnesota border by wednesday
evening, bringin chances for thunderstorms over most of the lake.

winds will remain southerly and light to moderate over most of the
lake through tonight, until the front sinks south over the lake 
during the post dawn hours tomorrow. the front will then stay
stationary over the lake with north winds over the northern half
and south winds over the southern half of the lake into wednesday
night. winds will then come around to northwesterly following the
passage of the surface low wednesday night into thursday morning.
gusty winds are then expected thursday as the pressure gradient
gets squeezed between the departing low pressure, and strong high
pressure of 30.2 inches over the northern plains.


lmz080-669-671-673-675-777-779-870-872-874-876-878-160330-
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-
217 pm cdt tue jul 15 2025

sheboygan wi to pentwater mi south...

.tonight...southeast winds 10 to 20 kt becoming south 10 to
15 kt. slight chance of showers overnight. waves 1 to 3 ft
subsiding to 1 to 2 ft. 
.wednesday...south winds 10 to 15 kt increasing to 10 to 20 kt.
chance of thunderstorms and slight chance of showers in the
afternoon. waves 1 to 2 ft. 
.wednesday night...south winds 10 to 20 kt veering to northwest.
showers and thunderstorms likely in the evening, then chance of
showers overnight. waves 2 to 4 ft. 
.thursday...northwest winds 15 to 25 kt becoming north to 30 kt.
chance of showers in the morning. waves 4 to 6 ft occasionally to
8 ft building to 4 to 7 ft occasionally to 9 ft. 
.thursday night...north winds 15 to 25 kt becoming northeast
10 to 20 kt. waves 4 to 7 ft occasionally to 9 ft subsiding to
4 to 6 ft occasionally to 8 ft. 
.friday...east winds 10 to 15 kt becoming northeast. waves 3 to
5 ft subsiding to 1 to 3 ft. 
.friday night...northeast winds 5 to 10 kt veering to southeast.
waves 1 to 2 ft. 
.saturday...south winds 10 to 15 kt. chance of showers. waves
1 to 2 ft. 
.sunday...north winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 3 ft.  

$$

fzus63 kmkx 151917
glflm 
expires:202507160330;;497259

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
217 pm cdt tue jul 15 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... 

a slow moving front will approach lake michigan from the 
northwest tonight as high pressure of 30.0 inches retreats east 
toward the east coast. low pressure of 29.7 inches will then 
approach lake michigan from the iowa/minnesota border by wednesday
evening, bringin chances for thunderstorms over most of the lake.

winds will remain southerly and light to moderate over most of the
lake through tonight, until the front sinks south over the lake 
during the post dawn hours tomorrow. the front will then stay
stationary over the lake with north winds over the northern half
and south winds over the southern half of the lake into wednesday
night. winds will then come around to northwesterly following the
passage of the surface low wednesday night into thursday morning.
gusty winds are then expected thursday as the pressure gradient
gets squeezed between the departing low pressure, and strong high
pressure of 30.2 inches over the northern plains.


lmz261-362-364-366-563-565-567-868-160330-
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-
217 pm cdt tue jul 15 2025

sheboygan wi to pentwater mi north...

.tonight...south winds to 30 kt diminishing to 10 to 20 kt. waves
3 to 5 ft subsiding to 1 to 3 ft. 
.wednesday...southwest winds 10 to 15 kt veering to north 10 to
20 kt. slight chance of showers and thunderstorms in the
afternoon. waves 1 to 3 ft. 
.wednesday night...northeast winds 10 to 20 kt becoming north.
showers likely with a chance of thunderstorms in the evening,
then showers likely overnight. waves 2 to 4 ft. 
.thursday...north winds 15 to 25 kt increasing to 30 kt. waves
4 to 6 ft occasionally to 8 ft. 
.thursday night...north winds 15 to 25 kt becoming northeast
10 to 20 kt. waves 4 to 6 ft occasionally to 8 ft subsiding to
2 to 4 ft. 
.friday...east winds 10 to 15 kt backing to west. waves 1 to
3 ft. 
.friday night...east winds 5 to 10 kt becoming south. waves 1 ft
or less. 
.saturday...south winds 10 to 15 kt. chance of showers. waves
1 to 2 ft. 
.sunday...north winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 2 ft.  

$$

fzus63 kmqt 151454
glfls 
expires:202507152300;;486155

open lake forecast for lake superior
national weather service marquette mi
1054 am edt tue jul 15 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...

today through tonight, a 29.7 inch low over the high plains will 
pass a 29.9 inch trough over lake superior. as the parent low 
weakens to 29.8 inches and moves over lakes michigan and huron 
wednesday, a 30.1 inch high pressure will build over the northern 
plains. this high will maintain 30.1 inches as it slowly moves over 
lake superior thursday, briefly building to 30.2 inches over lake 
huron friday before reaching the lower great lakes saturday at 30.1 
inches. saturday evening, a 29.9 inch trough will move from the 
northern plains over the lake before a 30.0 inch high is established 
over lake superior sunday.



lsz267-152300-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
1054 am edt tue jul 15 2025

.rest of today...south winds 10 to 20 knots. a chance of showers
and thunderstorms. waves calm to 2 feet building to 1 to 3 feet,
then subsiding to calm to 2 feet. 
.tonight...west winds 5 to 15 knots veering north late. a chance
of showers and thunderstorms. waves calm to 2 feet. 
.wednesday...north winds 10 to 20 knots veering northeast late.
showers likely and a slight chance of thunderstorms. waves
building to 2 to 4 feet. 
.wednesday night...northeast winds 15 to 25 knots backing north
after midnight. a chance of showers through midnight. a slight
chance of thunderstorms. showers likely after midnight. waves
2 to 4 feet. 
.thursday...north winds 15 to 25 knots becoming northwest 10 to
20 knots by mid afternoon. a chance of showers through early
afternoon. waves subsiding to calm to 2 feet. 
.thursday night...northwest winds 10 to 20 knots becoming west
5 to 15 knots after midnight. waves calm to 2 feet. 
.friday...southwest winds 5 to 15 knots backing south. waves calm
to 2 feet. 
.saturday...southeast winds 10 to 20 knots veering south. a
chance of showers. waves calm to 2 feet. 

$$

fzus63 kmqt 151454
glfls 
expires:202507152300;;486153

open lake forecast for lake superior
national weather service marquette mi
1054 am edt tue jul 15 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...

today through tonight, a 29.7 inch low over the high plains will 
pass a 29.9 inch trough over lake superior. as the parent low 
weakens to 29.8 inches and moves over lakes michigan and huron 
wednesday, a 30.1 inch high pressure will build over the northern 
plains. this high will maintain 30.1 inches as it slowly moves over 
lake superior thursday, briefly building to 30.2 inches over lake 
huron friday before reaching the lower great lakes saturday at 30.1 
inches. saturday evening, a 29.9 inch trough will move from the 
northern plains over the lake before a 30.0 inch high is established 
over lake superior sunday.



lsz265-152300-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
1054 am edt tue jul 15 2025

.rest of today...south winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon, then backing north late. haze by late
morning. a chance of showers and thunderstorms. waves calm to
2 feet. 
.tonight...north winds 5 to 15 knots increasing to 15 to
25 knots. showers likely through midnight. a chance of
thunderstorms. a chance of showers after midnight. waves building
to 2 to 4 feet. 
.wednesday...north winds 10 to 20 knots becoming northeast 15 to
25 knots in the afternoon. showers likely and a slight chance of
thunderstorms through early afternoon, then a chance of showers
by mid afternoon. waves subsiding to 1 to 3 feet. 
.wednesday night...north winds 10 to 20 knots. a chance of
showers and a slight chance of thunderstorms through midnight,
then showers likely after midnight. waves subsiding to calm to
2 feet. 
.thursday...north winds 10 to 20 knots backing northwest by mid
afternoon. waves calm to 2 feet. 
.thursday night...west winds 5 to 15 knots. waves calm to 2 feet.
.friday...southwest winds 5 to 15 knots becoming south 10 to
20 knots. a chance of showers. waves calm to 2 feet. 
.saturday...southeast winds 10 to 20 knots becoming northwest
5 to 15 knots. a chance of showers. waves calm to 2 feet. 

$$

fzus63 kmqt 151454
glfls 
expires:202507152300;;486152

open lake forecast for lake superior
national weather service marquette mi
1054 am edt tue jul 15 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...

today through tonight, a 29.7 inch low over the high plains will 
pass a 29.9 inch trough over lake superior. as the parent low 
weakens to 29.8 inches and moves over lakes michigan and huron 
wednesday, a 30.1 inch high pressure will build over the northern 
plains. this high will maintain 30.1 inches as it slowly moves over 
lake superior thursday, briefly building to 30.2 inches over lake 
huron friday before reaching the lower great lakes saturday at 30.1 
inches. saturday evening, a 29.9 inch trough will move from the 
northern plains over the lake before a 30.0 inch high is established 
over lake superior sunday.



lsz264-152300-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
1054 am edt tue jul 15 2025

.rest of today...southeast winds 5 to 15 knots veering west in
the afternoon, then veering north late. haze. showers likely and
a chance of thunderstorms. waves calm to 2 feet. 
.tonight...north winds 5 to 15 knots increasing to 10 to 20 knots
after midnight. haze through midnight. a chance of showers and
thunderstorms. waves building to 2 to 4 feet. 
.wednesday...northeast winds 10 to 20 knots. a chance of showers.
waves subsiding to calm to 2 feet. 
.wednesday night...north winds 5 to 15 knots. a chance of
showers. waves calm to 2 feet. 
.thursday...north winds 5 to 15 knots backing west by mid
afternoon. waves calm to 2 feet. 
.thursday night...west winds 5 to 15 knots backing southwest
after midnight. waves calm to 2 feet. 
.friday...southwest winds 5 to 15 knots backing south. a chance
of showers. waves calm to 2 feet. 
.saturday...east winds 5 to 15 knots backing north. a chance of
showers. waves calm to 2 feet. 

$$

fzus63 kmqt 151454
glfls 
expires:202507152300;;486151

open lake forecast for lake superior
national weather service marquette mi
1054 am edt tue jul 15 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...

today through tonight, a 29.7 inch low over the high plains will 
pass a 29.9 inch trough over lake superior. as the parent low 
weakens to 29.8 inches and moves over lakes michigan and huron 
wednesday, a 30.1 inch high pressure will build over the northern 
plains. this high will maintain 30.1 inches as it slowly moves over 
lake superior thursday, briefly building to 30.2 inches over lake 
huron friday before reaching the lower great lakes saturday at 30.1 
inches. saturday evening, a 29.9 inch trough will move from the 
northern plains over the lake before a 30.0 inch high is established 
over lake superior sunday.



lsz263-152300-
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-
1054 am edt tue jul 15 2025

.rest of today...east winds 5 to 15 knots backing northwest in
the afternoon, then veering north late. haze. a chance of showers
and thunderstorms by late morning. showers and thunderstorms
likely by mid afternoon. waves calm to 2 feet. 
.tonight...north winds 5 to 15 knots becoming northeast 10 to
20 knots after midnight, then increasing to 15 to 25 knots late.
showers likely through midnight. a chance of thunderstorms. a
chance of showers after midnight. waves building to 3 to 5 feet
occasionally to 7 feet. 
.wednesday...northeast winds 15 to 25 knots diminishing to 10 to
20 knots late. showers likely through early afternoon. a slight
chance of thunderstorms. a chance of showers by mid afternoon.
waves subsiding to 2 to 4 feet. 
.wednesday night...northeast winds 5 to 15 knots backing north
after midnight. a chance of showers. waves subsiding to calm to
2 feet. 
.thursday...north winds 5 to 15 knots backing southwest by mid
afternoon. waves calm to 2 feet. 
.thursday night...southwest winds 5 to 15 knots. waves calm to
2 feet. 
.friday...southwest winds 5 to 15 knots backing south. a chance
of showers. waves calm to 2 feet. 
.saturday...east winds 5 to 15 knots backing northeast. a chance
of showers. waves calm to 2 feet. 

$$

fzus63 kmqt 151454
glfls 
expires:202507152300;;486150

open lake forecast for lake superior
national weather service marquette mi
1054 am edt tue jul 15 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...

today through tonight, a 29.7 inch low over the high plains will 
pass a 29.9 inch trough over lake superior. as the parent low 
weakens to 29.8 inches and moves over lakes michigan and huron 
wednesday, a 30.1 inch high pressure will build over the northern 
plains. this high will maintain 30.1 inches as it slowly moves over 
lake superior thursday, briefly building to 30.2 inches over lake 
huron friday before reaching the lower great lakes saturday at 30.1 
inches. saturday evening, a 29.9 inch trough will move from the 
northern plains over the lake before a 30.0 inch high is established 
over lake superior sunday.



lsz162-152300-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1054 am edt tue jul 15 2025 /954 am cdt tue jul 15 2025/

.rest of today...east winds 5 to 15 knots backing north in the
afternoon. haze by late morning. a chance of showers and
thunderstorms by late morning, then showers and thunderstorms
likely by mid afternoon. waves calm to 2 feet. 
.tonight...northeast winds 5 to 15 knots increasing to 15 to
25 knots. a chance of showers through midnight. a chance of
thunderstorms. showers likely after midnight. waves building to
3 to 5 feet occasionally to 7 feet. 
.wednesday...northeast winds 15 to 25 knots becoming east 10 to
20 knots late. showers likely and a slight chance of
thunderstorms through early afternoon, then a chance of showers
by mid afternoon. waves subsiding to 2 to 4 feet. 
.wednesday night...northeast winds 10 to 20 knots backing north
after midnight. a chance of showers. waves subsiding to calm to
2 feet. 
.thursday...north winds 10 to 20 knots becoming southwest 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.thursday night...southwest winds 5 to 15 knots. waves calm to
2 feet. 
.friday...southwest winds 5 to 15 knots backing east. a chance of
showers. waves calm to 2 feet. 
.saturday...east winds 10 to 20 knots becoming northeast 5 to
15 knots. a chance of showers. waves calm to 2 feet. 

$$

fzus63 kmqt 151454
glfls 
expires:202507152300;;486154

open lake forecast for lake superior
national weather service marquette mi
1054 am edt tue jul 15 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...

today through tonight, a 29.7 inch low over the high plains will 
pass a 29.9 inch trough over lake superior. as the parent low 
weakens to 29.8 inches and moves over lakes michigan and huron 
wednesday, a 30.1 inch high pressure will build over the northern 
plains. this high will maintain 30.1 inches as it slowly moves over 
lake superior thursday, briefly building to 30.2 inches over lake 
huron friday before reaching the lower great lakes saturday at 30.1 
inches. saturday evening, a 29.9 inch trough will move from the 
northern plains over the lake before a 30.0 inch high is established 
over lake superior sunday.



lsz266-152300-
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-
1054 am edt tue jul 15 2025

.rest of today...south winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon, then becoming north 10 to 20 knots
late. haze by late morning. a chance of showers and
thunderstorms. waves calm to 2 feet building to 1 to 3 feet, then
subsiding to calm to 2 feet. 
.tonight...north winds 5 to 15 knots increasing to 10 to 20 knots
after midnight. showers likely through midnight. a chance of
thunderstorms. a chance of showers after midnight. waves building
to 2 to 4 feet. 
.wednesday...north winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon, then diminishing to 10 to 20 knots
late. showers likely and a slight chance of thunderstorms through
early afternoon, then a chance of showers by mid afternoon. waves
2 to 4 feet. 
.wednesday night...north winds 10 to 20 knots increasing to 15 to
25 knots after midnight. a chance of showers through midnight. a
slight chance of thunderstorms. showers likely after midnight.
waves 2 to 4 feet. 
.thursday...north winds 10 to 20 knots backing northwest by mid
afternoon. a slight chance of showers through early afternoon.
waves subsiding to calm to 2 feet. 
.thursday night...west winds 5 to 15 knots. waves calm to 2 feet.
.friday...southwest winds 5 to 15 knots backing south. waves calm
to 2 feet. 
.saturday...south winds 10 to 20 knots diminishing to 5 to
15 knots. a chance of showers. waves calm to 2 feet. 

$$