fzus63 kdtx 200149
glflh 
expires:202607201000;;262951

open lake forecast for lake huron
national weather service detroit/pontiac mi
949 pm edt sun jul 19 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 encompasses the great lakes tonight, 
then exits into the mid-atlantic on monday as a cold front reaches
the western great lakes. this front will pass across the region 
monday night into tuesday leading to periods of showers and 
thunderstorms. wet weather could persist into tuesday before high 
pressure from alberta/manitoba builds in by tuesday evening with a
drying effect.


lhz361-201000-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
949 pm edt sun jul 19 2026

.rest of tonight...south winds 5 to 10 knots increasing to 10 to
15 knots early in the morning. patchy smoke. waves 2 feet or
less. 
.monday...south winds 10 to 15 knots. patchy smoke. waves 1 to
3 feet building to 3 to 5 feet late in the afternoon. 
.monday night...south winds 10 to 15 knots increasing to 15 to
20 knots in the late evening and overnight. patchy smoke in the
evening. a chance of showers and thunderstorms in the evening...
then showers and a chance of thunderstorms after midnight. waves
4 to 6 feet. waves occasionally around 8 feet. 
.tuesday...southwest winds 15 to 20 knots veering to the west
with gusts to around 30 knots in the late morning and early
afternoon...then increasing to 20 to 25 knots with gusts to
around 30 knots early in the afternoon. a chance of showers in
the morning. waves 4 to 6 feet building to 6 to 9 feet early in
the afternoon. waves occasionally around 12 feet. 
.tuesday night...northwest winds to 30 knots decreasing to 20 to
25 knots in the late evening and overnight. waves 8 to 12 feet.
waves occasionally around 15 feet. 
.wednesday...northwest winds to 30 knots decreasing to 10 to
15 knots. waves 6 to 9 feet. waves occasionally around 12 feet. 
.thursday...southwest winds 5 to 10 knots. waves 1 to 3 feet. 
.friday...west winds 10 to 15 knots decreasing to 5 to 10 knots.
waves 2 feet or less. 


$$

fzus63 kdtx 200149
glflh 
expires:202607201000;;262952

open lake forecast for lake huron
national weather service detroit/pontiac mi
949 pm edt sun jul 19 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 encompasses the great lakes tonight, 
then exits into the mid-atlantic on monday as a cold front reaches
the western great lakes. this front will pass across the region 
monday night into tuesday leading to periods of showers and 
thunderstorms. wet weather could persist into tuesday before high 
pressure from alberta/manitoba builds in by tuesday evening with a
drying effect.


lhz362-363-201000-
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-
949 pm edt sun jul 19 2026

.rest of tonight...southeast winds 5 to 10 knots veering to the
south after midnight. waves 2 feet or less. 
.monday...south winds 5 to 10 knots increasing to 15 to 20 knots
with gusts to around 30 knots. patchy smoke in the afternoon.
waves 1 to 3 feet building to 5 to 7 feet. waves occasionally
around 10 feet. 
.monday night...south winds 15 to 20 knots increasing to 20 to
25 knots after midnight. gusts to 30 knots. a chance of showers
in the evening...then showers likely after midnight. patchy
smoke. waves 6 to 9 feet. waves occasionally around 12 feet. 
.tuesday...southwest winds 15 to 20 knots with gusts to around
30 knots decreasing to 10 to 15 knots in the late morning and
early afternoon...then becoming west 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 6 to
9 feet. waves occasionally around 12 feet. 
.tuesday night...northwest winds to 30 knots. a chance of showers
in the evening. waves 10 to 14 feet. waves occasionally around
18 feet. 
.wednesday...northwest winds to 30 knots decreasing to 10 to
15 knots. waves 8 to 12 feet. waves occasionally around 15 feet. 
.thursday...west winds 5 to 10 knots backing to the south . waves
3 to 5 feet subsiding to 1 to 3 feet. 
.friday...southwest winds 5 to 10 knots. waves 2 feet or less. 


$$

fzus63 kdtx 200149
glflh 
expires:202607201000;;262953

open lake forecast for lake huron
national weather service detroit/pontiac mi
949 pm edt sun jul 19 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 encompasses the great lakes tonight, 
then exits into the mid-atlantic on monday as a cold front reaches
the western great lakes. this front will pass across the region 
monday night into tuesday leading to periods of showers and 
thunderstorms. wet weather could persist into tuesday before high 
pressure from alberta/manitoba builds in by tuesday evening with a
drying effect.


lhz462>464-201000-
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-
949 pm edt sun jul 19 2026

.rest of tonight...light and variable winds. waves 2 feet or
less. 
.monday...southwest winds 5 to 10 knots becoming south 10 to
15 knots in the afternoon. patchy smoke. waves 1 to 3 feet. 
.monday night...south winds 15 to 20 knots. gusts to 30 knots
after midnight. patchy smoke. a chance of showers after midnight.
waves 3 to 5 feet building to 5 to 7 feet after midnight. waves
occasionally around 10 feet. 
.tuesday...southwest winds 15 to 20 knots with gusts to around
30 knots becoming west 10 to 15 knots early in the afternoon.
showers likely. waves 4 to 6 feet. waves occasionally around
8 feet. 
.tuesday night...northwest winds 15 to 20 knots increasing to
20 to 25 knots in the late evening and overnight. gusts to
30 knots. a chance of showers. waves 8 to 12 feet. waves
occasionally around 15 feet. 
.wednesday...northwest winds 20 to 25 knots with gusts to around
30 knots becoming northwest 20 to 25 knots. waves 8 to 12 feet.
waves occasionally around 15 feet. 
.thursday...west winds 5 to 10 knots backing to the southeast
early in the evening...then veering to the south by midnight.
waves 3 to 5 feet subsiding to 1 to 3 feet. 
.friday...southwest winds 5 to 10 knots veering to the north by
midnight. waves 2 feet or less. 


$$

fzus63 kmkx 200218
glflm 
expires:202607200930;;264165

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
918 pm cdt sun jul 19 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...

wildfire smoke currently overspreads lake michigan, with areas of
denser smoke reducing visibility to around 1 nautical mile at 
times. a marine dense smoke advisory is in effect across lake 
michigan into early monday morning.

high pressure will continue to exit southeastward tonight, with 
29.4 inch low pressure tracking southeastward across manitoba and 
ontario canada into monday. south to southwest winds build across
the lake tonight, becoming gusty into monday. a few gusts to gale
force will be possible monday afternoon and evening over the 
northern half of the lake. strong to severe thunderstorms will 
also be possible monday afternoon through monday night across the 
lake. 

a cold front crosses the lake monday night into tuesday morning.
winds veer northwest and become gusty again as it passes. winds
veer due north later tuesday into tuesday night with gusts to 
gale force possible.


lmz261-362-364-366-563-565-567-868-200930-
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-
918 pm cdt sun jul 19 2026

sheboygan wi to pentwater mi north...

...dense smoke advisory in effect until 7 am cdt monday...

.rest of tonight...south winds 10 to 20 kt becoming southwest
15 to 25 kt. patchy smoke. waves 2 to 4 ft. 
.monday...southwest winds 15 to 25 kt becoming south gales to
35 kt. patchy smoke. chance of showers and thunderstorms in the
afternoon. waves 3 to 5 ft building to 6 to 9 ft occasionally to
12 ft. 
.monday night...south gales to 40 kt becoming southwest gales to
35 kt late in the evening, then diminishing to 30 kt after
midnight becoming west late. patchy smoke in the evening. chance
of showers and thunderstorms. waves 6 to 9 ft occasionally to
12 ft subsiding to 4 to 7 ft occasionally to 9 ft. 
.tuesday...northwest winds to 30 kt increasing to gales to 35 kt.
waves 4 to 7 ft occasionally to 9 ft building to 5 to 8 ft
occasionally to 10 ft. 
.tuesday night...north gales to 35 kt. waves 8 to 11 ft
occasionally to 14 ft. 
.wednesday...north gales to 35 kt diminishing to 30 kt. waves
8 to 11 ft occasionally to 14 ft subsiding to 6 to 9 ft
occasionally to 12 ft. 
.wednesday night...west winds 15 to 25 kt becoming southwest 5 to
10 kt. waves 3 to 5 ft subsiding to 1 to 2 ft. 
.thursday...southwest winds 10 to 20 kt increasing to 15 to
25 kt. waves 1 to 2 ft building to 1 to 3 ft. 
.friday...west winds 10 to 20 kt becoming northwest. waves 1 to
3 ft.  

$$

fzus63 kmkx 200218
glflm 
expires:202607200930;;264166

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
918 pm cdt sun jul 19 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...

wildfire smoke currently overspreads lake michigan, with areas of
denser smoke reducing visibility to around 1 nautical mile at 
times. a marine dense smoke advisory is in effect across lake 
michigan into early monday morning.

high pressure will continue to exit southeastward tonight, with 
29.4 inch low pressure tracking southeastward across manitoba and 
ontario canada into monday. south to southwest winds build across
the lake tonight, becoming gusty into monday. a few gusts to gale
force will be possible monday afternoon and evening over the 
northern half of the lake. strong to severe thunderstorms will 
also be possible monday afternoon through monday night across the 
lake. 

a cold front crosses the lake monday night into tuesday morning.
winds veer northwest and become gusty again as it passes. winds
veer due north later tuesday into tuesday night with gusts to 
gale force possible.


lmz080-669-671-673-675-777-779-870-872-874-876-878-200930-
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-
918 pm cdt sun jul 19 2026

sheboygan wi to pentwater mi south...

...dense smoke advisory in effect until 7 am cdt monday...

.rest of tonight...east winds 5 to 10 kt veering to south. patchy
smoke. waves 1 to 2 ft. 
.monday...south winds 10 to 20 kt increasing to 30 kt. patchy
smoke. waves 2 to 4 ft building to 4 to 7 ft occasionally to
9 ft. 
.monday night...south winds to 30 kt becoming west. chance of
showers and thunderstorms. waves 5 to 8 ft occasionally to 10 ft.
.tuesday...west winds to 30 kt becoming northwest. waves 5 to
8 ft occasionally to 10 ft. 
.tuesday night...north gales to 35 kt. waves 8 to 12 ft
occasionally to 16 ft. 
.wednesday...north gales to 35 kt diminishing to 30 kt. waves
8 to 12 ft occasionally to 16 ft subsiding to 8 to 11 ft
occasionally to 14 ft. 
.wednesday night...northeast winds to 30 kt becoming northwest
5 to 10 kt. waves 5 to 8 ft occasionally to 10 ft subsiding to
3 to 5 ft. 
.thursday...west winds 10 to 15 kt becoming southwest 10 to
20 kt. waves 1 to 3 ft. 
.friday...west winds 10 to 15 kt becoming south 10 to 20 kt.
waves 1 to 3 ft.  

$$

fzus63 kmqt 200201
glfls 
expires:202607200800;;263237

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt sun jul 19 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... 

30.0 high pressure moves east as a 29.5 inch low moves into manitoba 
tonight, bringing troughing of 29.7 inches to the upper midwest. the 
low will track into ontario and deepen to 29.4 inches monday night 
with a 29.5 inch trough over lake superior. the low will then push 
east into quebec and retrograde to northern quebec for midweek. 
meanwhile a 30.1 inch ridge descends southeast over the midwest 
tuesday through wednesday night, moving into the ohio river valley 
on thursday with weak ridging of 29.9 inches extending back 
northwest over lake superior. another high pressure of 30.1 inches 
will move south through ontario on friday building to 30.2 inches 
over eastern ontario by saturday morning, extending a 30.1 inch 
ridge over lake superior.




lsz162-200800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 pm edt sun jul 19 2026 /900 pm cdt sun jul 19 2026/

.rest of tonight...southeast winds 5 to 15 knots becoming south
10 to 20 knots after midnight, then veering southwest late.
patchy smoke. a chance of showers and a slight chance of
thunderstorms. waves calm to 2 feet building to 1 to 3 feet. 
.monday...southwest winds 20 to 30 knots. a slight chance of
thunderstorms through early afternoon. a chance of showers. a
chance of thunderstorms by mid afternoon. some thunderstorms may
be severe by mid afternoon. waves building to 3 to 6 feet
occasionally to 8 feet, then subsiding to 2 to 4 feet. 
.monday night...west winds 20 to 30 knots diminishing to 15 to
25 knots after midnight. a slight chance of showers and
thunderstorms through midnight. waves subsiding to 1 to 3 feet. 
.tuesday...northwest winds 15 to 25 knots becoming north 20 to
30 knots by mid afternoon. waves building to 2 to 4 feet, then
subsiding to 1 to 3 feet. 
.tuesday night...northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.wednesday...west winds 5 to 15 knots becoming southwest 10 to
20 knots by mid afternoon. waves calm to 2 feet. 
.wednesday night...southwest winds 5 to 15 knots veering west
after midnight. waves calm to 2 feet. 
.thursday...southwest winds 10 to 20 knots becoming west 5 to
15 knots. waves building to 1 to 3 feet, then subsiding to calm
to 2 feet. 
.friday...east winds 5 to 15 knots backing northeast. waves calm
to 2 feet. 

$$

fzus63 kmqt 200201
glfls 
expires:202607200800;;263238

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt sun jul 19 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... 

30.0 high pressure moves east as a 29.5 inch low moves into manitoba 
tonight, bringing troughing of 29.7 inches to the upper midwest. the 
low will track into ontario and deepen to 29.4 inches monday night 
with a 29.5 inch trough over lake superior. the low will then push 
east into quebec and retrograde to northern quebec for midweek. 
meanwhile a 30.1 inch ridge descends southeast over the midwest 
tuesday through wednesday night, moving into the ohio river valley 
on thursday with weak ridging of 29.9 inches extending back 
northwest over lake superior. another high pressure of 30.1 inches 
will move south through ontario on friday building to 30.2 inches 
over eastern ontario by saturday morning, extending a 30.1 inch 
ridge over lake superior.




lsz263-200800-
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 pm edt sun jul 19 2026

...dense smoke advisory in effect until 8 am edt monday...

.rest of tonight...south winds 5 to 15 knots increasing to 15 to
25 knots. patchy smoke. a slight chance of showers by midnight. a
slight chance of thunderstorms. showers likely after midnight.
waves calm to 2 feet building to 2 to 4 feet. 
.monday...southwest winds 20 to 30 knots diminishing to 15 to
25 knots late. showers likely and a slight chance of
thunderstorms through early afternoon, then a chance of showers
and thunderstorms by mid afternoon. some thunderstorms may be
severe by mid afternoon. waves building to 3 to 6 feet
occasionally to 8 feet. 
.monday night...west winds 15 to 25 knots. a slight chance of
thunderstorms through midnight. a chance of showers. waves
subsiding to 2 to 4 feet, then building to 3 to 5 feet
occasionally to 7 feet. 
.tuesday...northwest winds 20 to 30 knots veering north by mid
afternoon. a slight chance of showers through early afternoon.
waves 3 to 5 feet occasionally to 7 feet. 
.tuesday night...northwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. waves subsiding to calm to 2 feet.
.wednesday...west winds 5 to 15 knots becoming southwest 10 to
20 knots by mid afternoon. waves building to 1 to 3 feet. 
.wednesday night...southwest winds 10 to 20 knots. waves
subsiding to calm to 2 feet. 
.thursday...southwest winds 10 to 20 knots becoming west 5 to
15 knots. waves building to 1 to 3 feet, then subsiding to calm
to 2 feet. 
.friday...northeast winds 5 to 15 knots veering east. waves calm
to 2 feet. 

$$

fzus63 kmqt 200201
glfls 
expires:202607200800;;263239

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt sun jul 19 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... 

30.0 high pressure moves east as a 29.5 inch low moves into manitoba 
tonight, bringing troughing of 29.7 inches to the upper midwest. the 
low will track into ontario and deepen to 29.4 inches monday night 
with a 29.5 inch trough over lake superior. the low will then push 
east into quebec and retrograde to northern quebec for midweek. 
meanwhile a 30.1 inch ridge descends southeast over the midwest 
tuesday through wednesday night, moving into the ohio river valley 
on thursday with weak ridging of 29.9 inches extending back 
northwest over lake superior. another high pressure of 30.1 inches 
will move south through ontario on friday building to 30.2 inches 
over eastern ontario by saturday morning, extending a 30.1 inch 
ridge over lake superior.




lsz264-200800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
1000 pm edt sun jul 19 2026

...dense smoke advisory in effect until 8 am edt monday...

.rest of tonight...south winds 5 to 15 knots increasing to 10 to
20 knots after midnight. areas of smoke. a chance of showers by
midnight. a chance of thunderstorms. showers likely after
midnight. waves calm to 2 feet building to 1 to 3 feet. 
.monday...south winds 15 to 25 knots becoming southwest 20 to
30 knots in the afternoon, then diminishing to 15 to 25 knots
late. patchy smoke through early afternoon. showers likely and a
chance of thunderstorms through early afternoon, then a chance of
showers and a slight chance of thunderstorms by mid afternoon.
some thunderstorms may be severe by mid afternoon. waves building
to 3 to 6 feet occasionally to 8 feet. 
.monday night...west winds 15 to 25 knots. a slight chance of
thunderstorms through midnight. a chance of showers. waves
subsiding to 2 to 4 feet, then building to 3 to 5 feet
occasionally to 7 feet. 
.tuesday...northwest winds 20 to 30 knots. a slight chance of
showers through early afternoon. waves building to 3 to 6 feet
occasionally to 8 feet. 
.tuesday night...northwest winds 20 to 30 knots diminishing to
15 to 25 knots after midnight. waves subsiding to 1 to 3 feet. 
.wednesday...northwest winds 10 to 20 knots becoming west 5 to
15 knots by mid afternoon. waves subsiding to calm to 2 feet. 
.wednesday night...southwest winds 5 to 15 knots veering west
after midnight. waves calm to 2 feet. 
.thursday...southwest winds 10 to 20 knots becoming west 5 to
15 knots. waves building to 1 to 3 feet, then subsiding to calm
to 2 feet. 
.friday...northeast winds 5 to 15 knots veering southeast. waves
calm to 2 feet. 

$$

fzus63 kmqt 200201
glfls 
expires:202607200800;;263240

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt sun jul 19 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... 

30.0 high pressure moves east as a 29.5 inch low moves into manitoba 
tonight, bringing troughing of 29.7 inches to the upper midwest. the 
low will track into ontario and deepen to 29.4 inches monday night 
with a 29.5 inch trough over lake superior. the low will then push 
east into quebec and retrograde to northern quebec for midweek. 
meanwhile a 30.1 inch ridge descends southeast over the midwest 
tuesday through wednesday night, moving into the ohio river valley 
on thursday with weak ridging of 29.9 inches extending back 
northwest over lake superior. another high pressure of 30.1 inches 
will move south through ontario on friday building to 30.2 inches 
over eastern ontario by saturday morning, extending a 30.1 inch 
ridge over lake superior.




lsz265-200800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
1000 pm edt sun jul 19 2026

...dense smoke advisory in effect until 8 am edt monday...

.rest of tonight...south winds 10 to 20 knots increasing to 15 to
25 knots after midnight. areas of smoke. a chance of showers and
thunderstorms. waves calm to 2 feet building to 1 to 3 feet. 
.monday...south winds 20 to 30 knots veering southwest in the
afternoon, then becoming south 15 to 25 knots late. patchy smoke.
a slight chance of thunderstorms through early afternoon. showers
likely. a chance of thunderstorms by mid afternoon. some
thunderstorms may be severe by mid afternoon. waves 1 to 3 feet. 
.monday night...southwest winds 15 to 25 knots becoming west
20 to 30 knots after midnight, then increasing to 30 knots with a
few gale force gusts to 35 knots possible late. a slight chance
of thunderstorms through midnight. a chance of showers. waves
building to 3 to 6 feet occasionally to 8 feet. 
.tuesday...northwest gales to 40 knots. a slight chance of
showers. waves building to 8 to 11 feet occasionally to 14 feet. 
.tuesday night...northwest gales to 40 knots. waves subsiding to
4 to 7 feet occasionally to 9 feet. 
.wednesday...northwest winds 20 to 30 knots becoming west 15 to
25 knots by mid afternoon. waves subsiding to calm to 2 feet. 
.wednesday night...west winds 10 to 20 knots becoming southwest
15 to 25 knots after midnight. waves calm to 2 feet. 
.thursday...west winds 10 to 20 knots. waves building to 1 to
3 feet, then subsiding to calm to 2 feet. 
.friday...northeast winds 5 to 15 knots veering southeast. waves
calm to 2 feet. 

$$

fzus63 kmqt 200201
glfls 
expires:202607200800;;263241

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt sun jul 19 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... 

30.0 high pressure moves east as a 29.5 inch low moves into manitoba 
tonight, bringing troughing of 29.7 inches to the upper midwest. the 
low will track into ontario and deepen to 29.4 inches monday night 
with a 29.5 inch trough over lake superior. the low will then push 
east into quebec and retrograde to northern quebec for midweek. 
meanwhile a 30.1 inch ridge descends southeast over the midwest 
tuesday through wednesday night, moving into the ohio river valley 
on thursday with weak ridging of 29.9 inches extending back 
northwest over lake superior. another high pressure of 30.1 inches 
will move south through ontario on friday building to 30.2 inches 
over eastern ontario by saturday morning, extending a 30.1 inch 
ridge over lake superior.




lsz266-200800-
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 pm edt sun jul 19 2026

...dense smoke advisory in effect until 8 am edt monday...

.rest of tonight...south winds 15 to 25 knots. areas of smoke. a
chance of showers and thunderstorms. waves calm to 2 feet
building to 2 to 4 feet, then subsiding to 1 to 3 feet. 
.monday...south winds 15 to 25 knots. patchy smoke. showers
likely and a chance of thunderstorms. some thunderstorms may be
severe by mid afternoon. waves building to 3 to 5 feet
occasionally to 7 feet. 
.monday night...south winds 15 to 25 knots veering west after
midnight, then increasing to 20 to 30 knots late. a chance of
thunderstorms through midnight. a chance of showers. waves
subsiding to 2 to 4 feet, then building to 3 to 6 feet
occasionally to 8 feet. 
.tuesday...northwest gales to 40 knots. a slight chance of
showers. waves building to 8 to 12 feet occasionally to 15 feet. 
.tuesday night...northwest gales to 40 knots. waves subsiding to
5 to 8 feet occasionally to 10 feet. 
.wednesday...northwest winds 20 to 30 knots becoming west 15 to
25 knots by mid afternoon. waves subsiding to 2 to 4 feet. 
.wednesday night...west winds 10 to 20 knots backing southwest
after midnight. waves subsiding to calm to 2 feet. 
.thursday...southwest winds 10 to 20 knots becoming west 5 to
15 knots. waves building to 1 to 3 feet, then subsiding to calm
to 2 feet. 
.friday...north winds 5 to 15 knots veering southeast. waves calm
to 2 feet. 

$$

fzus63 kmqt 200201
glfls 
expires:202607200800;;263242

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt sun jul 19 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... 

30.0 high pressure moves east as a 29.5 inch low moves into manitoba 
tonight, bringing troughing of 29.7 inches to the upper midwest. the 
low will track into ontario and deepen to 29.4 inches monday night 
with a 29.5 inch trough over lake superior. the low will then push 
east into quebec and retrograde to northern quebec for midweek. 
meanwhile a 30.1 inch ridge descends southeast over the midwest 
tuesday through wednesday night, moving into the ohio river valley 
on thursday with weak ridging of 29.9 inches extending back 
northwest over lake superior. another high pressure of 30.1 inches 
will move south through ontario on friday building to 30.2 inches 
over eastern ontario by saturday morning, extending a 30.1 inch 
ridge over lake superior.




lsz267-200800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
1000 pm edt sun jul 19 2026

...dense smoke advisory in effect until 8 am edt monday...

.rest of tonight...south winds 10 to 20 knots increasing to 15 to
25 knots late. areas of smoke. a chance of showers and
thunderstorms after midnight. waves calm to 2 feet building to
2 to 4 feet, then subsiding to 1 to 3 feet. 
.monday...south winds 15 to 25 knots increasing to 20 to 30 knots
late. patchy smoke. a slight chance of thunderstorms through
early afternoon. a chance of showers. a chance of thunderstorms
by mid afternoon. some thunderstorms may be severe by mid
afternoon. waves building to 3 to 5 feet occasionally to 7 feet. 
.monday night...south winds 15 to 25 knots veering west late.
patchy smoke through midnight. showers likely through midnight. a
chance of thunderstorms. a chance of showers after midnight.
waves subsiding to 2 to 4 feet. 
.tuesday...northwest winds 20 to 30 knots increasing to gales to
35 knots by mid afternoon. a slight chance of showers. waves
building to 7 to 10 feet occasionally to 13 feet. 
.tuesday night...northwest gales to 35 knots. a slight chance of
showers through midnight. waves subsiding to 5 to 8 feet
occasionally to 10 feet. 
.wednesday...northwest gales to 35 knots becoming west 20 to
30 knots by mid afternoon. waves subsiding to 3 to 6 feet
occasionally to 8 feet. 
.wednesday night...west winds 10 to 20 knots becoming southwest
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.thursday...southwest winds 5 to 15 knots. waves calm to 2 feet. 
.friday...north winds 5 to 15 knots veering southeast. waves calm
to 2 feet. 

$$