fzus63 kdtx 211953
glflh 
expires:202607220400;;366472

open lake forecast for lake huron
national weather service detroit/pontiac mi
353 pm edt tue jul 21 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 cold front tracks across the great lakes tonight
shifting winds to the northwest and diminishing thunderstorm
chances. a brief pop in wind gusts to gales will be possible
along the front. breezy northwest flow through mid-week before
high pressure fills in for the rest of the week.


lhz361-220400-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
353 pm edt tue jul 21 2026

.tonight...northwest winds to 30 knots decreasing to 20 to
25 knots after midnight. isolated gusts to 35 knot gales. waves 8
to 12 feet. waves occasionally around 15 feet. 
.wednesday...northwest winds 20 to 25 knots with gusts to around
30 knots decreasing to 15 to 20 knots late in the afternoon.
waves 6 to 9 feet. waves occasionally around 12 feet. 
.wednesday night...northwest winds 15 to 20 knots decreasing to
10 to 15 knots in the late evening and overnight. waves 4 to
6 feet subsiding to 2 to 4 feet after midnight. waves
occasionally around 8 feet. 
.thursday...west winds 5 to 10 knots increasing to 10 to 15 knots
in the late morning and early afternoon...then decreasing to 5 to
10 knots early in the afternoon. waves 1 to 3 feet. 
.thursday night...southwest winds 5 to 10 knots. waves 1 to
3 feet. 
.friday...southwest winds 10 to 15 knots becoming south 5 to
10 knots late in the morning...then backing to the southeast late
in the afternoon veering to the south late in the evening. waves
1 to 3 feet building to 2 to 4 feet late in the afternoon. 
.saturday...southwest winds 10 to 15 knots becoming south 5 to
10 knots in the late morning and early afternoon...then backing
to the southeast early in the evening veering to the south by
midnight. showers likely by midnight. waves 1 to 3 feet. 
.sunday...west winds 10 to 15 knots. showers likely early in the
morning. waves 1 to 3 feet. 


$$

fzus63 kdtx 211953
glflh 
expires:202607220400;;366473

open lake forecast for lake huron
national weather service detroit/pontiac mi
353 pm edt tue jul 21 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 cold front tracks across the great lakes tonight
shifting winds to the northwest and diminishing thunderstorm
chances. a brief pop in wind gusts to gales will be possible
along the front. breezy northwest flow through mid-week before
high pressure fills in for the rest of the week.


lhz362-363-220400-
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-
353 pm edt tue jul 21 2026

.tonight...northwest winds to 30 knots decreasing to 20 to
25 knots early in the morning. isolated gusts to 35 knot gales. 
waves 10 to 14 feet. waves occasionally around 18 feet. 
.wednesday...northwest winds 20 to 25 knots with gusts to around
30 knots decreasing to 15 to 20 knots late in the afternoon.
waves 8 to 12 feet. waves occasionally around 15 feet. 
.wednesday night...northwest winds 15 to 20 knots with gusts to
around 30 knots decreasing to 10 to 15 knots in the late evening
and overnight. waves 4 to 6 feet. 
.thursday...west winds 5 to 10 knots backing to the south early
in the afternoon. waves 2 to 4 feet subsiding to 1 to 3 feet in
the late morning and afternoon. waves occasionally around 8 feet.
.thursday night...south winds 10 to 15 knots decreasing to 5 to
10 knots in the late evening and overnight. waves 1 to 3 feet. 
.friday...southwest winds 5 to 10 knots becoming south 10 to
15 knots late in the afternoon. waves 1 to 3 feet building to
2 to 4 feet late in the afternoon. 
.saturday...south winds 5 to 10 knots increasing to 10 to
15 knots . a chance of showers by midnight. waves 1 to 3 feet
building to 2 to 4 feet . 
.sunday...southwest winds 5 to 10 knots backing to the east early
in the evening...then increasing to 10 to 15 knots by midnight. a
chance of showers early in the morning. a chance of showers .
waves 1 to 3 feet. 


$$

fzus63 kdtx 211953
glflh 
expires:202607220400;;366474

open lake forecast for lake huron
national weather service detroit/pontiac mi
353 pm edt tue jul 21 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 cold front tracks across the great lakes tonight
shifting winds to the northwest and diminishing thunderstorm
chances. a brief pop in wind gusts to gales will be possible
along the front. breezy northwest flow through mid-week before
high pressure fills in for the rest of the week.


lhz462>464-220400-
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-
353 pm edt tue jul 21 2026

.tonight...northwest winds 15 to 20 knots increasing to 20 to
25 knots with gusts to around 30 knots in the late evening and
overnight. scattered showers and thunderstorms in the evening.
waves 6 to 9 feet building to 8 to 12 feet in the late evening
and overnight. waves occasionally around 15 feet. 
.wednesday...northwest winds 20 to 25 knots decreasing to 10 to
15 knots. waves 6 to 9 feet. waves occasionally around 12 feet. 
.wednesday night...northwest winds 10 to 15 knots. waves 4 to
6 feet. waves occasionally around 8 feet. 
.thursday...west winds 5 to 10 knots until late afternoon
becoming light and variable. waves 2 to 4 feet subsiding to 1 to
3 feet in the late morning and afternoon. 
.thursday night...southeast winds 5 to 10 knots veering to the
south in the late evening and overnight. waves 2 feet or less. 
.friday...south winds 5 to 10 knots backing to the southeast late
in the afternoon. waves 2 feet or less. 
.saturday...south winds 5 to 10 knots increasing to 10 to
15 knots by midnight. a chance of. waves 2 feet or less. 
.sunday...southwest winds 5 to 10 knots backing to the southeast
early in the evening...then backing to the southeast 5 to
10 knots by midnight. a chance of showers. waves 1 to 3 feet. 


$$

fzus63 kmkx 211949
glflm 
expires:202607220330;;366293

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
249 pm cdt tue jul 21 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...

low pressure near 29.3 inches will move eastward across the 
james bay though this afternoon which will bring a secondary 
cold front across the lake through tonight. breezy northwest 
winds are expected and will veer to be from the north behind the
cold front. gusts are expected with a gale force wind possible 
for a brief period behind the front. wind speeds will start to 
decrease later tonight into wednesday as high pressure near 30.1 
inches begins to build into the region from the west.


lmz261-362-364-366-563-565-567-868-220330-
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-
249 pm cdt tue jul 21 2026

sheboygan wi to pentwater mi north...

.tonight...north gales to 35 kt becoming northwest to 30 kt.
waves 8 to 11 ft occasionally to 14 ft subsiding to 5 to 8 ft
occasionally to 10 ft. 
.wednesday...northwest winds to 30 kt becoming north 15 to 25 kt.
waves 4 to 7 ft occasionally to 9 ft subsiding to 3 to 5 ft. 
.wednesday night...northwest winds 10 to 20 kt becoming west
10 to 15 kt. waves 2 to 4 ft subsiding to 1 to 2 ft. 
.thursday...west winds 10 to 20 kt becoming southwest 15 to
25 kt. waves 2 to 4 ft. 
.thursday night...southwest winds 15 to 25 kt. waves 2 to 4 ft. 
.friday...southwest winds 10 to 20 kt becoming south 15 to 25 kt.
waves 2 to 4 ft. 
.friday night...south winds 15 to 25 kt becoming southwest. waves
1 to 3 ft. 
.saturday...southwest winds to 30 kt becoming south. waves 2 to
4 ft. 
.sunday...west winds 10 to 20 kt becoming southwest 15 to 25 kt.
waves 3 to 5 ft.  

$$

fzus63 kmkx 211949
glflm 
expires:202607220330;;366294

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
249 pm cdt tue jul 21 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...

low pressure near 29.3 inches will move eastward across the 
james bay though this afternoon which will bring a secondary 
cold front across the lake through tonight. breezy northwest 
winds are expected and will veer to be from the north behind the
cold front. gusts are expected with a gale force wind possible 
for a brief period behind the front. wind speeds will start to 
decrease later tonight into wednesday as high pressure near 30.1 
inches begins to build into the region from the west.


lmz080-669-671-673-675-777-779-870-872-874-876-878-220330-
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-
249 pm cdt tue jul 21 2026

sheboygan wi to pentwater mi south...

.tonight...north winds to 30 kt diminishing to 15 to 25 kt.
slight chance of showers this evening. waves 7 to 10 ft
occasionally to 13 ft building to 8 to 11 ft occasionally to
14 ft, then subsiding to 7 to 10 ft occasionally to 13 ft. 
.wednesday...north winds 15 to 25 kt. waves 5 to 8 ft
occasionally to 10 ft subsiding to 4 to 7 ft occasionally to
9 ft. 
.wednesday night...north winds 10 to 20 kt diminishing to 5 to
10 kt after midnight, then becoming northwest late. waves 4 to
6 ft occasionally to 8 ft subsiding to 2 to 4 ft. 
.thursday...west winds 10 to 15 kt becoming south 10 to 20 kt.
waves 1 to 3 ft. 
.thursday night...south winds 10 to 20 kt becoming southwest
10 to 15 kt. waves 1 to 3 ft. 
.friday...southwest winds 10 to 15 kt becoming south 10 to 20 kt.
waves 1 to 2 ft. 
.friday night...south winds 10 to 20 kt becoming southwest. waves
1 to 3 ft. 
.saturday...southwest winds 10 to 20 kt becoming south to 30 kt.
waves 1 to 2 ft building to 1 to 3 ft. 
.sunday...southwest winds 10 to 20 kt becoming south 15 to 25 kt.
waves 3 to 5 ft.  

$$

fzus63 kmqt 212001
glfls 
expires:202607220800;;366727

open lake forecast for lake superior
national weather service marquette mi
401 pm edt tue jul 21 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... 

heights continue to rise over the lake this evening into tonight as 
29.3 inch low pressure east of james bay continues to track through 
northern quebec and ridging over the northern plains expands 
eastward. the ridge over lake superior becomes maximized at 30.1 
inches over the western lake on wednesday before the high flattens 
and moves east towards new england thursday into friday morning. 
while ridging of around 30.0 inches looks to remain over lake 
superior on thursday, a weak 29.9 to 30.0 inch low could move over 
the northwestern half of the lake by thursday night into friday 
morning. as a low around 29.3 inches lifts from far northern ontario 
into hudson bay friday night into saturday morning, expect troughing 
of around 29.8 inches to move into lake superior in response by 
saturday morning. troughing of at least 29.8 inches looks to remain 
over the lake for the rest of the day. 




lsz162-220800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt tue jul 21 2026 /301 pm cdt tue jul 21 2026/

.late this afternoon...north winds 10 to 20 knots. waves calm to
2 feet. 
.tonight...northwest winds 10 to 20 knots. waves calm to 2 feet. 
.wednesday...west winds 5 to 15 knots backing southwest in the
afternoon, then increasing to 10 to 20 knots late. waves building
to 1 to 3 feet. 
.wednesday night...southwest winds 5 to 15 knots. waves subsiding
to calm to 2 feet. 
.thursday...southwest winds 10 to 20 knots. waves building to
1 to 3 feet. 
.thursday night...southwest winds 10 to 20 knots. waves subsiding
to calm to 2 feet. 
.friday...southwest winds 15 to 25 knots increasing to 20 to
30 knots by mid afternoon. waves building to 2 to 4 feet, then
subsiding to 1 to 3 feet. 
.friday night...southwest winds 20 to 30 knots increasing to
gales to 35 knots after midnight. a chance of showers. waves
subsiding to calm to 2 feet, then building to 2 to 4 feet. 
.saturday...southwest winds 20 to 30 knots becoming north 5 to
15 knots. a chance of showers. waves subsiding to calm to 2 feet.
.sunday...east winds 5 to 15 knots backing northeast. waves calm
to 2 feet. 

$$

fzus63 kmqt 212001
glfls 
expires:202607220800;;366728

open lake forecast for lake superior
national weather service marquette mi
401 pm edt tue jul 21 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... 

heights continue to rise over the lake this evening into tonight as 
29.3 inch low pressure east of james bay continues to track through 
northern quebec and ridging over the northern plains expands 
eastward. the ridge over lake superior becomes maximized at 30.1 
inches over the western lake on wednesday before the high flattens 
and moves east towards new england thursday into friday morning. 
while ridging of around 30.0 inches looks to remain over lake 
superior on thursday, a weak 29.9 to 30.0 inch low could move over 
the northwestern half of the lake by thursday night into friday 
morning. as a low around 29.3 inches lifts from far northern ontario 
into hudson bay friday night into saturday morning, expect troughing 
of around 29.8 inches to move into lake superior in response by 
saturday morning. troughing of at least 29.8 inches looks to remain 
over the lake for the rest of the day. 




lsz263-220800-
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 jul 21 2026

.late this afternoon...north winds 10 to 20 knots. waves 2 to
4 feet. 
.tonight...northwest winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.wednesday...northwest winds 5 to 15 knots backing west in the
afternoon, then becoming southwest 10 to 20 knots late. waves
building to 1 to 3 feet. 
.wednesday night...southwest winds 10 to 20 knots becoming west
5 to 15 knots after midnight, then increasing to 10 to 20 knots
late. waves subsiding to calm to 2 feet, then building to 1 to
3 feet. 
.thursday...southwest winds 15 to 25 knots. waves building to
2 to 4 feet. 
.thursday night...southwest winds 10 to 20 knots increasing to
15 to 25 knots after midnight. waves subsiding to 1 to 3 feet. 
.friday...southwest winds 20 to 30 knots. waves building to 2 to
4 feet, then subsiding to 1 to 3 feet. 
.friday night...southwest winds 20 to 30 knots increasing to
gales to 35 knots after midnight. a chance of showers after
midnight. waves building to 2 to 4 feet. 
.saturday...southwest gales to 35 knots becoming north 5 to
15 knots. a chance of showers. waves subsiding to calm to 2 feet.
.sunday...east winds 5 to 15 knots. a chance of showers. waves
calm to 2 feet. 

$$

fzus63 kmqt 212001
glfls 
expires:202607220800;;366729

open lake forecast for lake superior
national weather service marquette mi
401 pm edt tue jul 21 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... 

heights continue to rise over the lake this evening into tonight as 
29.3 inch low pressure east of james bay continues to track through 
northern quebec and ridging over the northern plains expands 
eastward. the ridge over lake superior becomes maximized at 30.1 
inches over the western lake on wednesday before the high flattens 
and moves east towards new england thursday into friday morning. 
while ridging of around 30.0 inches looks to remain over lake 
superior on thursday, a weak 29.9 to 30.0 inch low could move over 
the northwestern half of the lake by thursday night into friday 
morning. as a low around 29.3 inches lifts from far northern ontario 
into hudson bay friday night into saturday morning, expect troughing 
of around 29.8 inches to move into lake superior in response by 
saturday morning. troughing of at least 29.8 inches looks to remain 
over the lake for the rest of the day. 




lsz264-220800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
401 pm edt tue jul 21 2026

.late this afternoon...northwest winds 20 to 30 knots. waves 4 to
7 feet occasionally to 9 feet subsiding to 3 to 6 feet
occasionally to 8 feet. 
.tonight...northwest winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. waves subsiding to 1 to 3 feet. 
.wednesday...northwest winds 5 to 15 knots backing west in the
afternoon, then increasing to 10 to 20 knots late. waves
subsiding to calm to 2 feet. 
.wednesday night...west winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. waves building to 1 to 3 feet. 
.thursday...southwest winds 10 to 20 knots. waves building to
2 to 4 feet. 
.thursday night...southwest winds 10 to 20 knots increasing to
15 to 25 knots after midnight. a chance of showers. waves
subsiding to 1 to 3 feet. 
.friday...southwest winds 15 to 25 knots. waves building to 2 to
4 feet, then subsiding to 1 to 3 feet. 
.friday night...south winds 20 to 30 knots veering southwest
after midnight. a chance of showers. waves subsiding to calm to
2 feet, then building to 2 to 4 feet. 
.saturday...southwest winds 20 to 30 knots becoming north 5 to
15 knots. a chance of showers. waves subsiding to calm to 2 feet.
.sunday...southeast winds 5 to 15 knots backing east. waves calm
to 2 feet. 

$$

fzus63 kmqt 212001
glfls 
expires:202607220800;;366730

open lake forecast for lake superior
national weather service marquette mi
401 pm edt tue jul 21 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... 

heights continue to rise over the lake this evening into tonight as 
29.3 inch low pressure east of james bay continues to track through 
northern quebec and ridging over the northern plains expands 
eastward. the ridge over lake superior becomes maximized at 30.1 
inches over the western lake on wednesday before the high flattens 
and moves east towards new england thursday into friday morning. 
while ridging of around 30.0 inches looks to remain over lake 
superior on thursday, a weak 29.9 to 30.0 inch low could move over 
the northwestern half of the lake by thursday night into friday 
morning. as a low around 29.3 inches lifts from far northern ontario 
into hudson bay friday night into saturday morning, expect troughing 
of around 29.8 inches to move into lake superior in response by 
saturday morning. troughing of at least 29.8 inches looks to remain 
over the lake for the rest of the day. 




lsz265-220800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
401 pm edt tue jul 21 2026

...gale warning in effect until 8 pm edt this evening...

.late this afternoon...northwest gales to 40 knots. waves 6 to
9 feet occasionally to 11 feet. 
.tonight...northwest winds 20 to 30 knots diminishing to 15 to
25 knots late. waves subsiding to 2 to 4 feet. 
.wednesday...northwest winds 15 to 25 knots becoming west 10 to
20 knots late. waves subsiding to calm to 2 feet. 
.wednesday night...west winds 10 to 20 knots increasing to 15 to
25 knots late. waves calm to 2 feet. 
.thursday...west winds 10 to 20 knots backing southwest by mid
afternoon. waves building to 1 to 3 feet, then subsiding to calm
to 2 feet. 
.thursday night...south winds 10 to 20 knots becoming southwest
15 to 25 knots after midnight. waves building to 1 to 3 feet. 
.friday...southwest winds 10 to 20 knots backing south by mid
afternoon. waves subsiding to calm to 2 feet. 
.friday night...south winds 15 to 25 knots becoming southwest
20 to 30 knots after midnight. a chance of showers after
midnight. waves calm to 2 feet. 
.saturday...southwest winds 15 to 25 knots becoming south 10 to
20 knots. a chance of showers. waves calm to 2 feet. 
.sunday...east winds 10 to 20 knots. a chance of showers. waves
building to 1 to 3 feet, then subsiding to calm to 2 feet. 

$$

fzus63 kmqt 212001
glfls 
expires:202607220800;;366731

open lake forecast for lake superior
national weather service marquette mi
401 pm edt tue jul 21 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... 

heights continue to rise over the lake this evening into tonight as 
29.3 inch low pressure east of james bay continues to track through 
northern quebec and ridging over the northern plains expands 
eastward. the ridge over lake superior becomes maximized at 30.1 
inches over the western lake on wednesday before the high flattens 
and moves east towards new england thursday into friday morning. 
while ridging of around 30.0 inches looks to remain over lake 
superior on thursday, a weak 29.9 to 30.0 inch low could move over 
the northwestern half of the lake by thursday night into friday 
morning. as a low around 29.3 inches lifts from far northern ontario 
into hudson bay friday night into saturday morning, expect troughing 
of around 29.8 inches to move into lake superior in response by 
saturday morning. troughing of at least 29.8 inches looks to remain 
over the lake for the rest of the day. 




lsz266-220800-
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 jul 21 2026

...gale warning in effect until 8 pm edt this evening...

.late this afternoon...northwest gales to 35 knots. waves 7 to
10 feet occasionally to 13 feet. 
.tonight...northwest winds 20 to 30 knots. waves subsiding to
3 to 5 feet occasionally to 7 feet. 
.wednesday...northwest winds 15 to 25 knots backing west late.
waves subsiding to 2 to 4 feet. 
.wednesday night...west winds 10 to 20 knots. waves subsiding to
1 to 3 feet. 
.thursday...west winds 10 to 20 knots backing southwest by mid
afternoon. waves 1 to 3 feet. 
.thursday night...south winds 10 to 20 knots becoming southwest
15 to 25 knots after midnight. a chance of showers. waves
subsiding to calm to 2 feet, then building to 1 to 3 feet. 
.friday...southwest winds 10 to 20 knots backing south by mid
afternoon. waves subsiding to calm to 2 feet. 
.friday night...south winds 20 to 30 knots. a chance of showers
after midnight. waves building to 2 to 4 feet. 
.saturday...south winds 15 to 25 knots becoming southwest 5 to
15 knots. showers likely. a chance of thunderstorms. a chance of
showers. waves subsiding to calm to 2 feet. 
.sunday...north winds 5 to 15 knots veering southeast. waves
building to 1 to 3 feet, then subsiding to calm to 2 feet. 

$$

fzus63 kmqt 212001
glfls 
expires:202607220800;;366732

open lake forecast for lake superior
national weather service marquette mi
401 pm edt tue jul 21 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... 

heights continue to rise over the lake this evening into tonight as 
29.3 inch low pressure east of james bay continues to track through 
northern quebec and ridging over the northern plains expands 
eastward. the ridge over lake superior becomes maximized at 30.1 
inches over the western lake on wednesday before the high flattens 
and moves east towards new england thursday into friday morning. 
while ridging of around 30.0 inches looks to remain over lake 
superior on thursday, a weak 29.9 to 30.0 inch low could move over 
the northwestern half of the lake by thursday night into friday 
morning. as a low around 29.3 inches lifts from far northern ontario 
into hudson bay friday night into saturday morning, expect troughing 
of around 29.8 inches to move into lake superior in response by 
saturday morning. troughing of at least 29.8 inches looks to remain 
over the lake for the rest of the day. 




lsz267-220800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
401 pm edt tue jul 21 2026

...gale warning in effect until 8 pm edt this evening...

.late this afternoon...northwest gales to 35 knots. waves 7 to
10 feet occasionally to 13 feet. 
.tonight...northwest gales to 35 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 15 to
25 knots late. waves subsiding to 3 to 5 feet occasionally to
7 feet. 
.wednesday night...west winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. waves subsiding to 1 to 3 feet. 
.thursday...southwest winds 5 to 15 knots. waves subsiding to
calm to 2 feet. 
.thursday night...south winds 10 to 20 knots increasing to 15 to
25 knots after midnight. waves building to 1 to 3 feet. 
.friday...southwest winds 5 to 15 knots backing south by mid
afternoon. waves subsiding to calm to 2 feet. 
.friday night...south winds 15 to 25 knots increasing to 20 to
30 knots after midnight. waves building to 2 to 4 feet. 
.saturday...south winds 15 to 25 knots becoming southwest 10 to
20 knots. a chance of showers. waves subsiding to calm to 2 feet.
.sunday...northwest winds 10 to 20 knots becoming southeast 5 to
15 knots. waves building to 1 to 3 feet, then subsiding to calm
to 2 feet. 

$$