fzus63 kdtx 201354
glflh 
expires:202607202200;;291084

open lake forecast for lake huron
national weather service detroit/pontiac mi
954 am edt mon jul 20 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 influence wanes across the central great
lakes today with dry initial conditions, then a cold front passes
through tonight into tuesday. this leads to periods of showers
and thunderstorms. wet weather could persist on tuesday before
high pressure from alberta/manitoba builds in by tuesday evening
with a drying effect.


lhz361-202200-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
954 am edt mon jul 20 2026

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


$$

fzus63 kdtx 201354
glflh 
expires:202607202200;;291085

open lake forecast for lake huron
national weather service detroit/pontiac mi
954 am edt mon jul 20 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 influence wanes across the central great
lakes today with dry initial conditions, then a cold front passes
through tonight into tuesday. this leads to periods of showers
and thunderstorms. wet weather could persist on tuesday before
high pressure from alberta/manitoba builds in by tuesday evening
with a drying effect.


lhz362-363-202200-
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-
954 am edt mon jul 20 2026

.rest of today...south winds 10 to 15 knots increasing to 15 to
20 knots with gusts to around 30 knots in the afternoon. patchy
smoke. waves 1 to 3 feet building to 5 to 7 feet. waves
occasionally around 10 feet. 
.tonight...south winds 15 to 20 knots increasing to 20 to
25 knots after midnight. gusts to 30 knots. a chance of showers
and thunderstorms. 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. a chance of showers.
waves 6 to 9 feet. waves occasionally around 12 feet. 
.tuesday night...northwest winds to 30 knots. 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 backing to the south .
waves 2 feet or less. 


$$

fzus63 kdtx 201354
glflh 
expires:202607202200;;291086

open lake forecast for lake huron
national weather service detroit/pontiac mi
954 am edt mon jul 20 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 influence wanes across the central great
lakes today with dry initial conditions, then a cold front passes
through tonight into tuesday. this leads to periods of showers
and thunderstorms. wet weather could persist on tuesday before
high pressure from alberta/manitoba builds in by tuesday evening
with a drying effect.


lhz462>464-202200-
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-
954 am edt mon jul 20 2026

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


$$

fzus63 kmkx 201354
glflm 
expires:202607202115;;291081

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
854 am cdt mon jul 20 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 still encompasses parts of the lake but it is no
longer dense and no longer significantly impacting visibilities
and thus the marine dense smoke advisory is no longer in effect.

low pressure around 29.4 inches tracking southeast across manitoba
into ontario will drag a cold front across the lake tonight. 
south to southwest winds ahead of the front will become gusty. an 
occasional gale force gust will be possible this afternoon and 
evening over the northern half of the lake. strong to severe 
thunderstorms will also be possible this afternoon through tonight
across the entire lake. winds will veer northwest behind the cold
front and remain gusty. then winds veer due north later tuesday 
into tuesday night with gusts to gale force possible. heading into
wednesday winds are expected to diminish becoming light and 
variable by wednesday night as high pressures around 30.1 inches builds
into the great lakes region.


lmz261-362-364-366-563-565-567-868-202115-
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-
854 am cdt mon jul 20 2026

sheboygan wi to pentwater mi north...

.rest of today...southwest winds 10 to 20 kt becoming south gales
to 35 kt. chance of showers and slight chance of thunderstorms
this afternoon. waves 3 to 5 ft building to 6 to 9 ft
occasionally to 12 ft. 
.tonight...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. showers likely
with a chance of thunderstorms in the evening, then slight chance
of showers overnight. waves 7 to 10 ft occasionally to 13 ft
subsiding to 4 to 7 ft occasionally to 9 ft. 
.tuesday...west winds 15 to 25 kt becoming northwest to 30 kt
late in the morning, then increasing to gales to 35 kt early in
the afternoon becoming northwest gales to 35 kt late. 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 winds to 30 kt. waves 7 to 10 ft occasionally
to 13 ft subsiding to 4 to 7 ft occasionally to 9 ft. 
.wednesday night...west winds 15 to 25 kt becoming southwest 5 to
10 kt. waves 2 to 4 ft subsiding to 1 to 2 ft. 
.thursday...southwest winds 10 to 20 kt increasing to 15 to
25 kt. waves 1 to 3 ft. 
.friday...southwest winds 10 to 20 kt increasing to 15 to 25 kt.
waves 1 to 3 ft.  

$$

fzus63 kmkx 201354
glflm 
expires:202607202115;;291082

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
854 am cdt mon jul 20 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 still encompasses parts of the lake but it is no
longer dense and no longer significantly impacting visibilities
and thus the marine dense smoke advisory is no longer in effect.

low pressure around 29.4 inches tracking southeast across manitoba
into ontario will drag a cold front across the lake tonight. 
south to southwest winds ahead of the front will become gusty. an 
occasional gale force gust will be possible this afternoon and 
evening over the northern half of the lake. strong to severe 
thunderstorms will also be possible this afternoon through tonight
across the entire lake. winds will veer northwest behind the cold
front and remain gusty. then winds veer due north later tuesday 
into tuesday night with gusts to gale force possible. heading into
wednesday winds are expected to diminish becoming light and 
variable by wednesday night as high pressures around 30.1 inches builds
into the great lakes region.


lmz080-669-671-673-675-777-779-870-872-874-876-878-202115-
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-
854 am cdt mon jul 20 2026

sheboygan wi to pentwater mi south...

.rest of today...south winds 10 to 15 kt increasing to 30 kt.
patchy smoke this afternoon. waves 2 to 4 ft building to 5 to
8 ft occasionally to 10 ft. 
.tonight...south gales to 35 kt becoming west to 30 kt. chance of
showers and thunderstorms. waves 5 to 8 ft occasionally to 10 ft.
.tuesday...west winds to 30 kt becoming northwest. waves 4 to
7 ft occasionally to 9 ft. 
.tuesday night...north winds to 30 kt. waves 8 to 12 ft
occasionally to 16 ft. 
.wednesday...north winds to 30 kt. waves 8 to 11 ft occasionally
to 14 ft subsiding to 6 to 9 ft occasionally to 12 ft. 
.wednesday night...northeast winds to 30 kt becoming northwest
5 to 10 kt. waves 4 to 7 ft occasionally to 9 ft subsiding to
2 to 4 ft. 
.thursday...west winds 10 to 15 kt becoming southwest 10 to
20 kt. waves 1 to 3 ft. 
.friday...southwest winds 10 to 15 kt becoming south 10 to 20 kt.
waves 1 to 3 ft.  

$$

fzus63 kmqt 201401
glfls 
expires:202607202000;;291261

open lake forecast for lake superior
national weather service marquette mi
1001 am edt mon jul 20 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 low pressure will track into ontario and deepen to 29.4 inches 
tonight 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.




lsz162-202000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 am edt mon jul 20 2026 /901 am cdt mon jul 20 2026/

.rest of today...southwest winds to 30 knots with a few gale
force gusts to 35 knots possible diminishing to 20 to 30 knots in
the afternoon, then veering west late. patchy smoke by mid
afternoon. a slight chance of showers and thunderstorms by mid
afternoon. some thunderstorms may be severe. waves 3 to 6 feet
occasionally to 8 feet. 
.tonight...west winds 20 to 30 knots diminishing to 15 to
25 knots after midnight. patchy smoke through midnight. waves
subsiding to 1 to 3 feet, then building to 2 to 4 feet. 
.tuesday...northwest winds 15 to 25 knots becoming north 20 to
30 knots in the afternoon. waves subsiding to 1 to 3 feet, then
building to 2 to 4 feet. 
.tuesday night...northwest winds 10 to 20 knots. waves 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...west winds 5 to 15 knots. waves calm to
2 feet. 
.thursday...southwest winds 10 to 20 knots diminishing to 5 to
15 knots. a chance of showers. waves building to 1 to 3 feet,
then subsiding to calm to 2 feet. 
.friday...southwest winds 5 to 15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 201401
glfls 
expires:202607202000;;291262

open lake forecast for lake superior
national weather service marquette mi
1001 am edt mon jul 20 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 low pressure will track into ontario and deepen to 29.4 inches 
tonight 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.




lsz263-202000-
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-
1001 am edt mon jul 20 2026

.rest of today...southwest winds 20 to 30 knots. patchy smoke by
late morning. a slight chance of showers and thunderstorms by mid
afternoon. some thunderstorms may be severe. waves 4 to 7 feet
occasionally to 9 feet subsiding to 3 to 6 feet occasionally to
8 feet. 
.tonight...west winds 20 to 30 knots diminishing to 15 to
25 knots after midnight. patchy smoke through midnight. a slight
chance of thunderstorms through midnight. a slight chance of
showers. some thunderstorms may be severe. 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 in the
afternoon. waves building to 3 to 6 feet occasionally to 8 feet,
then subsiding to 2 to 4 feet. 
.tuesday night...northwest winds 10 to 20 knots. 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 veering west
after midnight. waves subsiding to calm to 2 feet, then building
to 1 to 3 feet. 
.thursday...southwest winds 10 to 20 knots diminishing to 5 to
15 knots. a chance of showers. waves subsiding to calm to 2 feet.
.friday...south winds 5 to 15 knots veering southwest. waves calm
to 2 feet. 

$$

fzus63 kmqt 201401
glfls 
expires:202607202000;;291263

open lake forecast for lake superior
national weather service marquette mi
1001 am edt mon jul 20 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 low pressure will track into ontario and deepen to 29.4 inches 
tonight 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.




lsz264-202000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
1001 am edt mon jul 20 2026

.rest of today...southwest winds 20 to 30 knots. patchy smoke by
late morning. a chance of showers and thunderstorms. waves 3 to
6 feet occasionally to 8 feet. 
.tonight...west winds 15 to 25 knots. patchy smoke through
midnight. a slight chance of thunderstorms through midnight. a
slight 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 becoming north to
30 knots with a few gale force gusts to 35 knots possible in the
afternoon, then backing northwest late. a slight chance of
showers through early afternoon. waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet. 
.tuesday night...northwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. waves subsiding to 1 to 3 feet. 
.wednesday...west winds 10 to 20 knots diminishing to 5 to
15 knots by mid afternoon. waves subsiding to calm to 2 feet. 
.wednesday night...southwest winds 5 to 15 knots becoming west
10 to 20 knots after midnight. waves building to 1 to 3 feet,
then subsiding to calm to 2 feet. 
.thursday...southwest winds 10 to 20 knots becoming west 5 to
15 knots. waves subsiding to calm to 2 feet. 
.friday...south winds 5 to 15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 201401
glfls 
expires:202607202000;;291264

open lake forecast for lake superior
national weather service marquette mi
1001 am edt mon jul 20 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 low pressure will track into ontario and deepen to 29.4 inches 
tonight 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.




lsz265-202000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
1001 am edt mon jul 20 2026

...gale watch in effect from tuesday morning through late tuesday
night...

.rest of today...south winds 20 to 30 knots becoming southwest
15 to 25 knots in the afternoon. patchy smoke. a slight chance of
showers and thunderstorms. some thunderstorms may be severe by
mid afternoon. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.tonight...west winds 20 to 30 knots increasing to gales to
35 knots late. patchy smoke. a chance of thunderstorms through
midnight. a slight chance of showers. some thunderstorms may be
severe. waves building to 2 to 4 feet, then subsiding to 1 to
3 feet. 
.tuesday...northwest gales to 45 knots. a slight chance of
showers. waves building to 8 to 11 feet occasionally to 14 feet. 
.tuesday night...northwest gales to 40 knots diminishing to 20 to
30 knots after midnight. waves subsiding to 3 to 6 feet
occasionally to 8 feet. 
.wednesday...northwest winds 20 to 30 knots becoming west 10 to
20 knots by mid afternoon. waves subsiding to calm to 2 feet. 
.wednesday night...west winds 10 to 20 knots increasing to 15 to
25 knots after midnight. waves calm to 2 feet. 
.thursday...west winds 10 to 20 knots backing southwest. waves
building to 1 to 3 feet, then subsiding to calm to 2 feet. 
.friday...east winds 10 to 20 knots veering southwest. waves calm
to 2 feet. 

$$

fzus63 kmqt 201401
glfls 
expires:202607202000;;291265

open lake forecast for lake superior
national weather service marquette mi
1001 am edt mon jul 20 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 low pressure will track into ontario and deepen to 29.4 inches 
tonight 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.




lsz266-202000-
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-
1001 am edt mon jul 20 2026

...gale watch in effect from tuesday morning through late tuesday
night...

.rest of today...south winds 20 to 30 knots diminishing to 15 to
25 knots in the afternoon. patchy smoke. a slight chance of
thunderstorms by late morning. a chance of showers. a chance of
thunderstorms by mid afternoon. some thunderstorms may be severe
by mid afternoon. waves 2 to 4 feet building to 3 to 5 feet
occasionally to 7 feet. 
.tonight...southwest 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. patchy smoke
after midnight. waves subsiding to 2 to 4 feet, then building to
3 to 5 feet occasionally to 7 feet. 
.tuesday...northwest gales to 40 knots. a slight chance of
showers. waves building to 9 to 12 feet occasionally to 15 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 10 to
20 knots by mid afternoon. waves subsiding to 2 to 4 feet. 
.wednesday night...west winds 10 to 20 knots. waves subsiding to
calm to 2 feet, then building to 1 to 3 feet. 
.thursday...west winds 10 to 20 knots becoming southwest 5 to
15 knots. waves subsiding to calm to 2 feet. 
.friday...south winds 5 to 15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 201401
glfls 
expires:202607202000;;291266

open lake forecast for lake superior
national weather service marquette mi
1001 am edt mon jul 20 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 low pressure will track into ontario and deepen to 29.4 inches 
tonight 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.




lsz267-202000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
1001 am edt mon jul 20 2026

...gale watch in effect from tuesday morning through late tuesday
night...

.rest of today...south winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon. patchy smoke. a chance of showers by
late morning. showers likely and a chance of thunderstorms by mid
afternoon. some thunderstorms may be severe. waves 2 to 4 feet
building to 3 to 5 feet occasionally to 7 feet. 
.tonight...south winds 15 to 25 knots veering west late. showers
and a chance of thunderstorms through midnight, then a chance of
showers after midnight. patchy smoke after midnight. waves
subsiding to 2 to 4 feet, then building to 3 to 5 feet
occasionally to 7 feet. 
.tuesday...west winds 20 to 30 knots becoming northwest gales to
40 knots in the afternoon. a slight chance of showers through
early afternoon. waves building to 8 to 11 feet occasionally to
14 feet. 
.tuesday night...northwest gales to 35 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 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...west winds 5 to 15 knots backing southwest. waves
building to 1 to 3 feet, then subsiding to calm to 2 feet. 
.friday...west winds 5 to 15 knots backing south. waves calm to
2 feet. 

$$