fzus63 kdtx 302002
glflh 
expires:202607010415;;183294

open lake forecast for lake huron
national weather service detroit/pontiac mi
402 pm edt tue jun 30 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 hot and humid air mass maintains residence through
the week with modest south to southwest winds. the central great
lakes will largely remain dry and stable through thursday.
however, the prevailing storm track directed over the northern
great lakes may bring occasional rounds of storms to northern
lake huron.


lhz361-010415-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
402 pm edt tue jun 30 2026

.tonight...light and variable winds becoming south 5 to 10 knots
after midnight. scattered showers and thunderstorms. areas of
fog. waves 1 to 3 feet. 
.wednesday...southwest winds 10 to 15 knots decreasing to 5 to
10 knots in the late morning and early afternoon...then veering
to the southwest 5 to 10 knots late in the afternoon. scattered
showers and thunderstorms in the morning. waves 1 to 3 feet. 
.wednesday night...south winds 5 to 10 knots increasing to 10 to
15 knots after midnight. scattered showers and thunderstorms in
the evening...then scattered showers after midnight. waves 1 to
3 feet building to 2 to 4 feet after midnight. 
.thursday...southwest winds 10 to 15 knots. scattered showers in
the morning. waves 2 to 4 feet. 
.thursday night...west winds 10 to 15 knots decreasing to 5 to
10 knots in the late evening and overnight. waves 1 to 3 feet. 
.friday...west winds 5 to 10 knots. a chance of thunderstorms
late in the morning. a chance of showers. waves 2 feet or less. 
.saturday...northwest winds 5 to 10 knots backing to the west. a 
chance of showers early in the morning. waves 2 feet or less. 
.sunday...northeast winds 5 to 10 knots until afternoon becoming
light and variable. waves 2 feet or less. 


$$

fzus63 kdtx 302002
glflh 
expires:202607010415;;183295

open lake forecast for lake huron
national weather service detroit/pontiac mi
402 pm edt tue jun 30 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 hot and humid air mass maintains residence through
the week with modest south to southwest winds. the central great
lakes will largely remain dry and stable through thursday.
however, the prevailing storm track directed over the northern
great lakes may bring occasional rounds of storms to northern
lake huron.


lhz362-363-010415-
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-
402 pm edt tue jun 30 2026

.tonight...southwest winds 10 to 15 knots. areas of fog. waves
2 to 4 feet. 
.wednesday...southwest winds 5 to 10 knots. waves 2 to 4 feet. 
.wednesday night...south winds 5 to 10 knots becoming southwest
10 to 15 knots after midnight. waves 2 to 4 feet. 
.thursday...southwest winds 10 to 15 knots becoming south 5 to
10 knots early in the afternoon. scattered showers in the
morning...then scattered showers and thunderstorms in the
afternoon. waves 2 to 4 feet. 
.thursday night...southwest winds 5 to 10 knots early in the
evening becoming light and variable. scattered showers in the
evening. waves 2 to 4 feet subsiding to 1 to 3 feet in the late
evening and overnight. 
.friday...light and variable winds becoming southwest 5 to
10 knots late in the morning...then backing to the southeast late
in the afternoon veering to the west late in the evening. a
chance of showers and thunderstorms. waves 2 feet or less. 
.saturday...west winds 5 to 10 knots becoming light and variable.
a chance of showers early in the morning. waves 2 feet or less. 
.sunday...north winds 5 to 10 knots. waves 2 feet or less. 


$$

fzus63 kdtx 302002
glflh 
expires:202607010415;;183296

open lake forecast for lake huron
national weather service detroit/pontiac mi
402 pm edt tue jun 30 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 hot and humid air mass maintains residence through
the week with modest south to southwest winds. the central great
lakes will largely remain dry and stable through thursday.
however, the prevailing storm track directed over the northern
great lakes may bring occasional rounds of storms to northern
lake huron.


lhz462>464-010415-
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-
402 pm edt tue jun 30 2026

.tonight...south winds 5 to 10 knots becoming southwest 10 to
15 knots after midnight. waves 2 to 4 feet. 
.wednesday...southwest winds 5 to 10 knots backing to the south
in the afternoon. waves 1 to 3 feet. 
.wednesday night...southwest winds 5 to 10 knots increasing to
10 to 15 knots after midnight. waves 1 to 3 feet. 
.thursday...southwest winds 10 to 15 knots. waves 1 to 3 feet
building to 2 to 4 feet in the late morning and afternoon. 
.thursday night...southwest winds 10 to 15 knots becoming west
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...southwest winds 5 to 10 knots backing to the south late
in the afternoon...then veering to the southwest late in the
evening. showers likely and a chance of thunderstorms. waves
2 feet or less. 
.saturday...west winds 5 to 10 knots veering to the north. a
chance of thunderstorms early in the morning. a chance of showers
early in the morning. waves 2 feet or less. 
.sunday...north winds 5 to 10 knots. a chance of showers early in
the evening. waves 2 feet or less. 


$$

fzus63 kmkx 302034
glflm 
expires:202607010300;;184860

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
333 pm cdt tue jun 30 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...

modest to breezy southerly winds will prevail into thursday then
lighter into friday as high pressure around 30.1 inches remains 
to the southeast of the great lakes, while troughs of low pressure
around 29.2 inches continue over canada into the northern great 
plains. scattered thunderstorms are forecast across the northern 
half tonight through wednesday night, and across the southern two 
thirds thursday into friday, and across the whole lake friday into
saturday as a cold front shifts winds to northerly. patchy marine
fog will be possible at times, primarily over the northern half of
the lake, as a warm moist air mass moves over the lake.


lmz080-669-671-673-675-777-779-870-872-874-876-878-010300-
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-
333 pm cdt tue jun 30 2026

sheboygan wi to pentwater mi south...

.tonight...south winds 15 to 25 kt becoming southwest 10 to
20 kt. waves 4 to 6 ft occasionally to 8 ft subsiding to 3 to
5 ft. 
.wednesday...southwest winds 10 to 20 kt becoming south 15 to
25 kt. waves 2 to 4 ft building to 3 to 5 ft. 
.wednesday night...south winds 15 to 25 kt becoming southwest
10 to 20 kt. scattered showers overnight. waves 4 to 6 ft
occasionally to 8 ft. 
.thursday...southwest winds 10 to 20 kt. scattered showers with a
chance of thunderstorms in the afternoon. waves 3 to 5 ft. 
.thursday night...southwest winds 10 to 15 kt. scattered showers
with a chance of thunderstorms in the evening, then scattered
showers overnight. waves 2 to 4 ft. 
.friday...southwest winds 10 to 15 kt becoming south 10 to 20 kt.
scattered showers in the morning, then scattered showers with a
chance of thunderstorms in the afternoon. waves 1 to 2 ft. 
.friday night...southwest winds 10 to 15 kt becoming west.
showers likely with a chance of thunderstorms. waves 1 to 2 ft.
.saturday...northwest winds 10 to 15 kt becoming north 10 to
20 kt. waves 1 to 3 ft. 
.sunday...northeast winds 10 to 15 kt becoming north 10 to 20 kt.
waves 1 to 3 ft.  

$$

fzus63 kmkx 302034
glflm 
expires:202607010300;;184859

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
333 pm cdt tue jun 30 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...

modest to breezy southerly winds will prevail into thursday then
lighter into friday as high pressure around 30.1 inches remains 
to the southeast of the great lakes, while troughs of low pressure
around 29.2 inches continue over canada into the northern great 
plains. scattered thunderstorms are forecast across the northern 
half tonight through wednesday night, and across the southern two 
thirds thursday into friday, and across the whole lake friday into
saturday as a cold front shifts winds to northerly. patchy marine
fog will be possible at times, primarily over the northern half of
the lake, as a warm moist air mass moves over the lake.


lmz261-362-364-366-563-565-567-868-010300-
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-
333 pm cdt tue jun 30 2026

sheboygan wi to pentwater mi north...

.tonight...southwest winds to 30 kt diminishing to 10 to 20 kt.
slight chance of thunderstorms with isolated showers this
evening, then scattered showers and slight chance of
thunderstorms overnight. waves 4 to 6 ft occasionally to 8 ft
subsiding to 3 to 5 ft. 
.wednesday...southwest winds 10 to 20 kt becoming south 15 to
25 kt. patchy fog in the morning. slight chance of thunderstorms
with isolated showers in the morning, then scattered showers and
slight chance of thunderstorms in the afternoon. waves 2 to 4 ft
building to 3 to 5 ft. 
.wednesday night...south winds 15 to 25 kt becoming southwest.
scattered showers with a chance of thunderstorms in the evening,
then numerous showers with a chance of thunderstorms overnight.
waves 4 to 6 ft occasionally to 8 ft. 
.thursday...southwest winds 15 to 25 kt. scattered showers. waves
3 to 5 ft. 
.thursday night...southwest winds 10 to 20 kt diminishing to 5 to
10 kt overnight. scattered showers with a chance of thunderstorms
in the evening, then numerous showers overnight. waves 2 to 4 ft.
.friday...south winds 10 to 15 kt becoming southwest 10 to 20 kt.
numerous showers in the morning, then numerous showers with a
chance of thunderstorms in the afternoon. waves 1 to 2 ft. 
.friday night...southwest winds 10 to 15 kt veering to north.
showers likely with a chance of thunderstorms. waves 1 to 2 ft.
.saturday...northeast winds 10 to 15 kt increasing to 10 to
20 kt. waves 1 to 3 ft. 
.sunday...northeast winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 2 ft.  

$$

fzus63 kmqt 302001
glfls 
expires:202607010800;;183222

open lake forecast for lake superior
national weather service marquette mi
401 pm edt tue jun 30 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 29.2 inch low will remain stalled near lake winnipeg tonight and 
gradually weaken to 29.5 inches by wednesday morning. it will then 
weaken further with a broad 29.6 inch low over ontario and quebec by 
late wednesday afternoon. the low will push toward the hudson bay 
and quebec wednesday night into thursday dragging a 29.7 inch trough 
over lake superior. thereafter a 30.0 inch high will build over 
ontario, extending south into the upper great lakes through the 
weekend.




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 tue jun 30 2026

...dense fog advisory in effect until 11 am edt wednesday...

.late this afternoon...south winds 5 to 15 knots. areas of dense
fog. a slight chance of showers and thunderstorms. waves 1 to
3 feet. 
.tonight...south winds 10 to 20 knots becoming southwest 5 to
15 knots after midnight. patchy fog. waves 1 to 3 feet. 
.wednesday...southwest winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon, then backing south late. waves
building to 2 to 4 feet. 
.wednesday night...southwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. a slight chance of showers and
thunderstorms through midnight. waves subsiding to calm to
2 feet, then building to 1 to 3 feet. 
.thursday...southwest winds 10 to 20 knots. waves building to
1 to 3 feet. 
.thursday night...west winds 5 to 15 knots veering north after
midnight. waves subsiding to calm to 2 feet. 
.friday...northeast winds less than 10 knots. waves calm to
2 feet. 
.friday night...northwest winds less than 10 knots veering north
after midnight. waves calm to 2 feet. 
.saturday...northeast winds 5 to 15 knots veering east. waves
calm to 2 feet. 
.sunday...east winds 5 to 15 knots veering southeast. waves calm
to 2 feet. 

$$

fzus63 kmqt 302001
glfls 
expires:202607010800;;183223

open lake forecast for lake superior
national weather service marquette mi
401 pm edt tue jun 30 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 29.2 inch low will remain stalled near lake winnipeg tonight and 
gradually weaken to 29.5 inches by wednesday morning. it will then 
weaken further with a broad 29.6 inch low over ontario and quebec by 
late wednesday afternoon. the low will push toward the hudson bay 
and quebec wednesday night into thursday dragging a 29.7 inch trough 
over lake superior. thereafter a 30.0 inch high will build over 
ontario, extending south into the upper great lakes through the 
weekend.




lsz265-010800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
401 pm edt tue jun 30 2026

...dense fog advisory in effect until 11 am edt wednesday...

.late this afternoon...south winds 10 to 20 knots. patchy dense
fog. a chance of showers and thunderstorms. some thunderstorms
may be severe. waves calm to 2 feet. 
.tonight...south winds 10 to 20 knots veering southwest after
midnight. a slight chance of showers and thunderstorms through
midnight. patchy fog. some thunderstorms may be severe. waves
calm to 2 feet. 
.wednesday...southwest winds 10 to 20 knots backing south in the
afternoon. a slight chance of showers and thunderstorms by mid
afternoon. waves calm to 2 feet. 
.wednesday night...south winds 10 to 20 knots veering southwest
after midnight. a chance of showers and thunderstorms. waves calm
to 2 feet. 
.thursday...west winds 10 to 20 knots diminishing to 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.thursday night...southwest winds 10 to 20 knots becoming west
5 to 15 knots after midnight. waves calm to 2 feet. 
.friday...northeast winds 5 to 15 knots. a chance of showers.
waves calm to 2 feet. 
.friday night...northwest winds 5 to 15 knots veering north after
midnight. a chance of showers. waves calm to 2 feet. 
.saturday...northeast winds 5 to 15 knots veering east. waves
calm to 2 feet. 
.sunday...east winds 5 to 15 knots veering south. waves calm to
2 feet. 

$$

fzus63 kmqt 302001
glfls 
expires:202607010800;;183224

open lake forecast for lake superior
national weather service marquette mi
401 pm edt tue jun 30 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 29.2 inch low will remain stalled near lake winnipeg tonight and 
gradually weaken to 29.5 inches by wednesday morning. it will then 
weaken further with a broad 29.6 inch low over ontario and quebec by 
late wednesday afternoon. the low will push toward the hudson bay 
and quebec wednesday night into thursday dragging a 29.7 inch trough 
over lake superior. thereafter a 30.0 inch high will build over 
ontario, extending south into the upper great lakes through the 
weekend.




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 tue jun 30 2026

...dense fog advisory in effect until 11 am edt wednesday...

.late this afternoon...south winds 10 to 20 knots. patchy dense
fog. a chance of showers and thunderstorms. some thunderstorms
may be severe. waves calm to 2 feet. 
.tonight...south winds 10 to 20 knots becoming southwest 15 to
25 knots after midnight, then diminishing to 10 to 20 knots late.
a slight chance of showers and thunderstorms through midnight.
patchy fog. some thunderstorms may be severe. waves building to
1 to 3 feet. 
.wednesday...southwest winds 5 to 15 knots backing south in the
afternoon. patchy dense fog through early afternoon. a slight
chance of showers and thunderstorms by mid afternoon. waves
subsiding to calm to 2 feet. 
.wednesday night...south winds 10 to 20 knots veering southwest
after midnight. a chance of showers and a slight chance of
thunderstorms. waves building to 1 to 3 feet, then subsiding to
calm to 2 feet. 
.thursday...southwest winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. waves building to 1 to 3 feet. 
.thursday night...southwest winds 5 to 15 knots veering west
after midnight. waves subsiding to calm to 2 feet. 
.friday...northeast winds 5 to 15 knots backing north by mid
afternoon. a chance of showers. waves calm to 2 feet. 
.friday night...northwest winds 5 to 15 knots veering north after
midnight. a chance of showers. waves calm to 2 feet. 
.saturday...north winds 5 to 15 knots. waves calm to 2 feet. 
.sunday...east winds 5 to 15 knots veering south. waves calm to
2 feet. 

$$

fzus63 kmqt 302001
glfls 
expires:202607010800;;183225

open lake forecast for lake superior
national weather service marquette mi
401 pm edt tue jun 30 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 29.2 inch low will remain stalled near lake winnipeg tonight and 
gradually weaken to 29.5 inches by wednesday morning. it will then 
weaken further with a broad 29.6 inch low over ontario and quebec by 
late wednesday afternoon. the low will push toward the hudson bay 
and quebec wednesday night into thursday dragging a 29.7 inch trough 
over lake superior. thereafter a 30.0 inch high will build over 
ontario, extending south into the upper great lakes through the 
weekend.




lsz267-010800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
401 pm edt tue jun 30 2026

...dense fog advisory in effect until 11 am edt wednesday...

.late this afternoon...south winds 10 to 20 knots. patchy dense
fog. a chance of showers and thunderstorms. some thunderstorms
may be severe. waves calm to 2 feet. 
.tonight...south winds 10 to 20 knots veering southwest after
midnight, then diminishing to 5 to 15 knots late. patchy fog
through midnight. areas of dense fog after midnight. a chance of
thunderstorms through midnight. a chance of showers. a slight
chance of thunderstorms after midnight. some thunderstorms may be
severe through midnight. waves building to 1 to 3 feet, then
subsiding to calm to 2 feet. 
.wednesday...southwest winds 5 to 15 knots backing southeast in
the afternoon, then veering south late. areas of dense fog
through early afternoon. a slight chance of showers and
thunderstorms by mid afternoon. waves calm to 2 feet. 
.wednesday night...south winds 10 to 20 knots veering southwest
late. showers likely through midnight. a chance of thunderstorms.
a chance of showers after midnight. waves building to 1 to
3 feet, then subsiding to calm to 2 feet. 
.thursday...west winds 5 to 15 knots. waves calm to 2 feet. 
.thursday night...south winds 5 to 15 knots backing north after
midnight. waves calm to 2 feet. 
.friday...northwest winds 5 to 15 knots. a chance of showers.
waves calm to 2 feet. 
.friday night...northwest winds 5 to 15 knots. a chance of
showers. waves calm to 2 feet. 
.saturday...northwest winds 5 to 15 knots. waves calm to 2 feet. 
.sunday...east winds 5 to 15 knots veering south. waves calm to
2 feet. 

$$

fzus63 kmqt 302001
glfls 
expires:202607010800;;183220

open lake forecast for lake superior
national weather service marquette mi
401 pm edt tue jun 30 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 29.2 inch low will remain stalled near lake winnipeg tonight and 
gradually weaken to 29.5 inches by wednesday morning. it will then 
weaken further with a broad 29.6 inch low over ontario and quebec by 
late wednesday afternoon. the low will push toward the hudson bay 
and quebec wednesday night into thursday dragging a 29.7 inch trough 
over lake superior. thereafter a 30.0 inch high will build over 
ontario, extending south into the upper great lakes through the 
weekend.




lsz162-010800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt tue jun 30 2026 /301 pm cdt tue jun 30 2026/

...dense fog advisory in effect until 11 am edt /10 am cdt/
wednesday...

.late this afternoon...southwest winds 10 to 20 knots. waves calm
to 2 feet. 
.tonight...southwest winds 10 to 20 knots. waves calm to 2 feet. 
.wednesday...southwest winds 10 to 20 knots. a slight chance of
showers and thunderstorms by mid afternoon. waves building to
1 to 3 feet, then subsiding to calm to 2 feet. 
.wednesday night...southwest winds 5 to 15 knots. a chance of
showers and a slight chance of thunderstorms through midnight.
waves calm to 2 feet. 
.thursday...southwest winds 10 to 20 knots. waves building to
1 to 3 feet, then subsiding to calm to 2 feet. 
.thursday night...west winds 5 to 15 knots veering northeast
after midnight. waves calm to 2 feet. 
.friday...northeast winds 5 to 15 knots. a chance of showers.
waves calm to 2 feet. 
.friday night...northeast winds 5 to 15 knots. waves calm to
2 feet. 
.saturday...northeast winds 5 to 15 knots. a chance of showers.
waves calm to 2 feet. 
.sunday...northeast winds 5 to 15 knots becoming north less than
10 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 302001
glfls 
expires:202607010800;;183221

open lake forecast for lake superior
national weather service marquette mi
401 pm edt tue jun 30 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 29.2 inch low will remain stalled near lake winnipeg tonight and 
gradually weaken to 29.5 inches by wednesday morning. it will then 
weaken further with a broad 29.6 inch low over ontario and quebec by 
late wednesday afternoon. the low will push toward the hudson bay 
and quebec wednesday night into thursday dragging a 29.7 inch trough 
over lake superior. thereafter a 30.0 inch high will build over 
ontario, extending south into the upper great lakes through the 
weekend.




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 tue jun 30 2026

...dense fog advisory in effect until 11 am edt wednesday...

.late this afternoon...southwest winds 10 to 20 knots. patchy
dense fog. a slight chance of showers and thunderstorms. waves
calm to 2 feet building to 1 to 3 feet. 
.tonight...southwest winds 10 to 20 knots diminishing to 5 to
15 knots late. patchy dense fog through midnight. waves 1 to
3 feet. 
.wednesday...southwest winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. a slight chance of showers and
thunderstorms by mid afternoon. waves building to 2 to 4 feet. 
.wednesday night...southwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. a chance of showers and a slight
chance of thunderstorms through midnight. waves subsiding to calm
to 2 feet. 
.thursday...southwest winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. waves building to 2 to 4 feet, then
subsiding to 1 to 3 feet. 
.thursday night...west winds 10 to 20 knots becoming northeast
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.friday...northeast winds 5 to 15 knots. a chance of showers.
waves calm to 2 feet. 
.friday night...northeast winds 5 to 15 knots. waves calm to
2 feet. 
.saturday...northeast winds 5 to 15 knots veering east. waves
calm to 2 feet. 
.sunday...northeast winds 5 to 15 knots. waves calm to 2 feet. 

$$