fzus63 kdtx 190134
glflh 
expires:202607190945;;207157

open lake forecast for lake huron
national weather service detroit/pontiac mi
934 pm edt sat jul 18 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 low pressure system tracking through the northern
lakes region will drag a cold front through the eastern lakes
through this evening. high pressure will then build in tonight
and remain across the region through the rest of the weekend.


lhz361-362-190945-
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-
934 pm edt sat jul 18 2026

.rest of tonight...north winds 10 to 15 knots. areas of smoke.
waves 3 to 5 feet. 
.sunday...north winds 5 to 10 knots in the morning becoming light
and variable. areas of smoke in the morning. waves 2 to 4 feet
subsiding to 1 to 3 feet in the late morning and afternoon. 
.sunday night...south winds 5 to 10 knots increasing to 10 to
15 knots after midnight. waves 2 feet or less. 
.monday...south winds 10 to 15 knots increasing to 15 to 20 knots
with gusts to around 30 knots early in the afternoon. a chance of
showers in the afternoon. waves 1 to 3 feet building to 4 to
6 feet early in the afternoon. waves occasionally around 8 feet. 
.monday night...south winds 15 to 20 knots. gusts to 30 knots
early in the evening then 30 knots after midnight. showers. waves
6 to 9 feet. waves occasionally around 12 feet. 
.tuesday...southwest winds 10 to 15 knots becoming west 15 to
20 knots with gusts to around 30 knots late in the morning...then
becoming northwest to 30 knots with gusts to 35 knot gales late
in the afternoon. showers likely in the morning. a chance of
showers. waves 5 to 7 feet building to 10 to 14 feet late in the
afternoon. waves occasionally around 18 feet. 
.wednesday...northwest winds to 30 knots decreasing to 15 to
20 knots by midnight. gusts to 35 knot gales. a chance of showers
early in the morning. waves 10 to 14 feet. waves occasionally
around 18 feet. 
.thursday...west winds 5 to 10 knots backing to the south by
midnight. waves 3 to 5 feet subsiding to 1 to 3 feet. 


$$

fzus63 kdtx 190134
glflh 
expires:202607190945;;207158

open lake forecast for lake huron
national weather service detroit/pontiac mi
934 pm edt sat jul 18 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 low pressure system tracking through the northern
lakes region will drag a cold front through the eastern lakes
through this evening. high pressure will then build in tonight
and remain across the region through the rest of the weekend.


lhz363-462>464-190945-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
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-
934 pm edt sat jul 18 2026

.rest of tonight...north winds 15 to 20 knots decreasing to 10 to
15 knots early in the morning. smoke. waves 5 to 7 feet. waves
occasionally around 10 feet. 
.sunday...north winds 10 to 15 knots becoming light and variable.
areas of smoke in the morning. waves 2 to 4 feet subsiding to
1 to 3 feet late in the afternoon. 
.sunday night...light and variable winds becoming south 5 to
10 knots after midnight. waves 1 to 3 feet. 
.monday...south winds 5 to 10 knots increasing to 10 to 15 knots
in the late morning and afternoon. waves 1 to 3 feet building to
4 to 6 feet. waves occasionally around 8 feet. 
.monday night...south winds 15 to 20 knots. gusts to 30 knots in
the late evening and overnight. showers. waves 5 to 7 feet. waves
occasionally around 10 feet. 
.tuesday...south winds 15 to 20 knots becoming southwest 10 to
15 knots late in the morning...then becoming northwest 15 to
20 knots with gusts to 35 knot gales late in the afternoon
increasing to 20 to 25 knots with gusts to 35 knot gales late in
the evening. showers. a chance of thunderstorms. a chance of
showers late in the afternoon. waves 4 to 6 feet building to
10 to 14 feet late in the afternoon. waves occasionally around
18 feet. 
.wednesday...northwest winds 20 to 25 knots decreasing to 15 to
20 knots by midnight. gusts to 35 knot gales. a chance of showers
early in the morning. waves 10 to 14 feet. waves occasionally
around 18 feet. 
.thursday...northwest winds 5 to 10 knots backing to the south by
midnight. waves 4 to 6 feet subsiding to 1 to 3 feet. waves
occasionally around 8 feet. 


$$

fzus63 kmkx 190301
glflm 
expires:202607190930;;210094

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
1001 pm cdt sat jul 18 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 has returned to lake michigan this evening and may
become dense once again. the smoke is expected to reduce 
visibility to 1 nautical mile at times, and a marine dense smoke 
advisory is in effect across lake michigan into early monday 
morning.

gusty northwest winds have come around to north to northeast  
and will quickly taper off over the next few hours, as high 
pressure around 30.1 inches moves over the northern great lakes. 
northeast to light and variable winds are then expected sunday 
into sunday night. 

gusty south to southwest winds may then develop monday into
monday night, with gusty west to northwest winds possible into 
the middle of next week. a few southerly gales are possible 
monday afternoon and evening, with a few northwest gales possible 
tuesday night into wednesday.


lmz080-669-671-673-675-777-779-870-872-874-876-878-190930-
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-
1001 pm cdt sat jul 18 2026

sheboygan wi to pentwater mi south...

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

.rest of tonight...northeast winds to 30 kt diminishing to 10 to
15 kt. areas of smoke. waves 4 to 7 ft occasionally to 9 ft
subsiding to 4 to 6 ft occasionally to 8 ft. 
.sunday...northeast winds 10 to 15 kt becoming northwest 10 to
20 kt. areas of smoke. waves 3 to 5 ft subsiding to 1 to 3 ft. 
.sunday night...north winds 10 to 15 kt backing to south 10 to
20 kt. areas of smoke. waves 1 to 2 ft. 
.monday...southwest winds 15 to 25 kt becoming south to 30 kt.
areas of smoke. waves 2 to 4 ft building to 5 to 8 ft
occasionally to 10 ft. 
.monday night...southwest winds to 30 kt. showers with a chance
of thunderstorms. waves 5 to 8 ft occasionally to 10 ft. 
.tuesday...west winds 15 to 25 kt becoming northwest gales to
35 kt in the afternoon. waves 5 to 8 ft occasionally to 10 ft. 
.tuesday night...north gales to 40 kt diminishing to gales to
35 kt. waves 8 to 12 ft occasionally to 16 ft. 
.wednesday...north gales to 35 kt. waves 8 to 12 ft occasionally
to 16 ft. 
.thursday...west winds 10 to 15 kt backing to south 10 to 20 kt.
waves 1 to 3 ft.  

$$

fzus63 kmkx 190301
glflm 
expires:202607190930;;210093

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
1001 pm cdt sat jul 18 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 has returned to lake michigan this evening and may
become dense once again. the smoke is expected to reduce 
visibility to 1 nautical mile at times, and a marine dense smoke 
advisory is in effect across lake michigan into early monday 
morning.

gusty northwest winds have come around to north to northeast  
and will quickly taper off over the next few hours, as high 
pressure around 30.1 inches moves over the northern great lakes. 
northeast to light and variable winds are then expected sunday 
into sunday night. 

gusty south to southwest winds may then develop monday into
monday night, with gusty west to northwest winds possible into 
the middle of next week. a few southerly gales are possible 
monday afternoon and evening, with a few northwest gales possible 
tuesday night into wednesday.


lmz261-362-364-366-563-565-567-868-190930-
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-
1001 pm cdt sat jul 18 2026

sheboygan wi to pentwater mi north...

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

.rest of tonight...north winds to 30 kt becoming northeast 10 to
15 kt. areas of smoke. waves 4 to 6 ft occasionally to 8 ft
subsiding to 2 to 4 ft. 
.sunday...northeast winds 5 to 10 kt becoming southeast late in
the morning, then veering to southwest 10 to 20 kt in the
afternoon. areas of smoke. waves 1 to 3 ft subsiding to 1 to
2 ft. 
.sunday night...southwest winds 10 to 20 kt increasing to 15 to
25 kt. areas of smoke. waves 2 to 4 ft. 
.monday...southwest winds to 30 kt becoming south gales to 35 kt.
areas of smoke. showers likely with a chance of thunderstorms in
the afternoon. waves 3 to 5 ft building to 5 to 8 ft occasionally
to 10 ft. 
.monday night...southwest gales to 35 kt diminishing to 30 kt.
showers with a chance of thunderstorms in the evening, then
showers overnight. waves 6 to 9 ft occasionally to 12 ft
subsiding to 5 to 8 ft occasionally to 10 ft. 
.tuesday...northwest winds to 30 kt increasing to gales to 40 kt
in the afternoon. waves 4 to 7 ft occasionally to 9 ft. 
.tuesday night...north gales to 40 kt diminishing to gales to
35 kt. waves 8 to 11 ft occasionally to 14 ft. 
.wednesday...north gales to 35 kt. waves 7 to 10 ft occasionally
to 13 ft subsiding to 6 to 9 ft occasionally to 12 ft. 
.thursday...southwest winds 10 to 20 kt increasing to 15 to
25 kt. waves 1 to 3 ft.  

$$

fzus63 kmqt 190201
glfls 
expires:202607190800;;207820

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt sat jul 18 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 30.0 inch high builds over the upper great lakes tonight. the high 
then moves east as a 29.5 inch low moves into manitoba by late 
sunday night, 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.




lsz264-190800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
1001 pm edt sat jul 18 2026

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

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

$$

fzus63 kmqt 190201
glfls 
expires:202607190800;;207821

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt sat jul 18 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 30.0 inch high builds over the upper great lakes tonight. the high 
then moves east as a 29.5 inch low moves into manitoba by late 
sunday night, 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.




lsz265-190800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
1001 pm edt sat jul 18 2026

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

.rest of tonight...northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight, then backing south late. smoke.
waves calm to 2 feet. 
.sunday...south winds 5 to 15 knots increasing to 10 to 20 knots
in the afternoon, then backing southeast late. areas of smoke. a
slight chance of showers by mid afternoon. waves calm to 2 feet. 
.sunday night...south winds 10 to 20 knots increasing to 15 to
25 knots after midnight, then veering southwest late. areas of
smoke. a chance of showers. a slight chance of thunderstorms
after midnight. waves building to 1 to 3 feet. 
.monday...southwest winds 20 to 30 knots becoming south 15 to
25 knots by mid afternoon. a chance of showers through early
afternoon. a chance of thunderstorms. showers by mid afternoon.
waves 1 to 3 feet. 
.monday night...southwest winds 15 to 25 knots becoming west
20 to 30 knots after midnight. showers likely and a chance of
thunderstorms through midnight, then a slight chance of showers
after midnight. waves building to 3 to 5 feet occasionally to
7 feet. 
.tuesday...northwest gales to 40 knots. waves building to 6 to
10 feet occasionally to 13 feet. 
.tuesday night...northwest gales to 35 knots. waves subsiding to
4 to 7 feet occasionally to 9 feet. 
.wednesday...northwest gales to 35 knots becoming southwest 10 to
20 knots. waves subsiding to calm to 2 feet. 
.thursday...southwest winds 10 to 20 knots. waves calm to 2 feet.

$$

fzus63 kmqt 190201
glfls 
expires:202607190800;;207822

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt sat jul 18 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 30.0 inch high builds over the upper great lakes tonight. the high 
then moves east as a 29.5 inch low moves into manitoba by late 
sunday night, 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.




lsz266-190800-
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 pm edt sat jul 18 2026

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

.rest of tonight...northwest winds 10 to 20 knots becoming north
5 to 15 knots after midnight, then veering south late. smoke.
waves 2 to 4 feet subsiding to calm to 2 feet. 
.sunday...south winds 5 to 15 knots. smoke. a slight chance of
showers by mid afternoon. waves calm to 2 feet. 
.sunday night...south winds 10 to 20 knots increasing to 15 to
25 knots after midnight. patchy smoke. a chance of showers
through midnight. a slight chance of thunderstorms. showers
likely after midnight. waves building to 2 to 4 feet. 
.monday...south winds 15 to 25 knots. showers and a chance of
thunderstorms. waves 2 to 4 feet. 
.monday night...south winds 10 to 20 knots becoming west 20 to
30 knots after midnight. showers likely and a chance of
thunderstorms through midnight, then a slight chance of showers
after midnight. waves subsiding to 1 to 3 feet, then building to
3 to 6 feet occasionally to 8 feet. 
.tuesday...northwest gales to 40 knots. waves building to 8 to
11 feet occasionally to 14 feet. 
.tuesday night...northwest gales to 35 knots. waves subsiding to
4 to 7 feet occasionally to 9 feet. 
.wednesday...northwest gales to 35 knots becoming west 10 to
20 knots. waves subsiding to 1 to 3 feet. 
.thursday...southwest winds 5 to 15 knots becoming south 10 to
20 knots. waves subsiding to calm to 2 feet, then building to
1 to 3 feet. 

$$

fzus63 kmqt 190201
glfls 
expires:202607190800;;207823

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt sat jul 18 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 30.0 inch high builds over the upper great lakes tonight. the high 
then moves east as a 29.5 inch low moves into manitoba by late 
sunday night, 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.




lsz267-190800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
1001 pm edt sat jul 18 2026

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

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

$$

fzus63 kmqt 190201
glfls 
expires:202607190800;;207818

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt sat jul 18 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 30.0 inch high builds over the upper great lakes tonight. the high 
then moves east as a 29.5 inch low moves into manitoba by late 
sunday night, 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.




lsz162-190800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 pm edt sat jul 18 2026 /901 pm cdt sat jul 18 2026/

.rest of tonight...southeast winds 5 to 15 knots diminishing to
less than 10 knots after midnight, then becoming north 5 to
15 knots late. areas of smoke. waves calm to 2 feet. 
.sunday...southwest winds 5 to 15 knots backing south late. areas
of smoke. a slight chance of showers by mid afternoon. waves calm
to 2 feet. 
.sunday night...southwest winds 5 to 15 knots increasing to 10 to
20 knots late. a chance of showers and a slight chance of
thunderstorms. waves calm to 2 feet. 
.monday...southwest winds 15 to 25 knots increasing to 20 to
30 knots by mid afternoon. a chance of showers through early
afternoon. a chance of thunderstorms. showers likely by mid
afternoon. waves building to 2 to 4 feet, then subsiding to 1 to
3 feet. 
.monday night...west winds 15 to 25 knots. a chance of showers
and a slight chance of thunderstorms through midnight. waves
subsiding to calm to 2 feet, then building to 1 to 3 feet. 
.tuesday...northwest winds 15 to 25 knots becoming north 10 to
20 knots by mid afternoon. waves subsiding to calm to 2 feet. 
.tuesday night...north winds 10 to 20 knots becoming northwest
5 to 15 knots after midnight. waves building to 1 to 3 feet, then
subsiding to calm to 2 feet. 
.wednesday...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. 
.thursday...southwest winds 10 to 20 knots. waves building to
1 to 3 feet, then subsiding to calm to 2 feet. 

$$

fzus63 kmqt 190201
glfls 
expires:202607190800;;207819

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt sat jul 18 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 30.0 inch high builds over the upper great lakes tonight. the high 
then moves east as a 29.5 inch low moves into manitoba by late 
sunday night, 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.




lsz263-190800-
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 pm edt sat jul 18 2026

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

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

$$