fzus63 kdtx 081335
glflh 
expires:202609082145;;111874

open lake forecast for lake huron
national weather service detroit/pontiac mi
935 am edt tue sep 8 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, 30.2 inches, will reside across the
eastern great lakes today. low pressure, 29.30 inches, will track
across northern ontario late today and tonight, driving a slow
moving cold front across the great lakes region tonight into
wednesday. this system will provide showers and few thunderstorms
to the lakes. high pressure will expand into the region from the
west thursday into friday.


lhz361-082145-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
935 am edt tue sep 8 2026

.rest of today...southeast winds 5 to 10 knots increasing to
10 to 15 knots late in the afternoon. waves 2 feet or less. 
.tonight...south winds 10 to 15 knots. a chance of showers in the
evening...then showers likely after midnight. waves 1 to 3 feet. 
.wednesday...southwest winds 10 to 15 knots becoming west 15 to
20 knots early in the afternoon. a chance of showers. waves 1 to
3 feet building to 3 to 5 feet early in the afternoon. 
.wednesday night...west winds 10 to 15 knots increasing to 15 to
20 knots after midnight. waves 2 to 4 feet. 
.thursday...northwest winds 10 to 15 knots becoming light and
variable. waves 2 to 4 feet subsiding to 1 to 3 feet late in the
evening. 
.friday...light and variable winds becoming south 5 to 10 knots
in the late morning and early afternoon...then becoming southeast
10 to 15 knots . waves 2 feet or less building to 2 to 4 feet by
midnight. 
.saturday...south winds 10 to 15 knots veering to the west early
in the evening...then decreasing to 5 to 10 knots by midnight. a
chance of showers. waves 2 to 4 feet subsiding to 1 to 3 feet . 


$$

fzus63 kdtx 081335
glflh 
expires:202609082145;;111875

open lake forecast for lake huron
national weather service detroit/pontiac mi
935 am edt tue sep 8 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, 30.2 inches, will reside across the
eastern great lakes today. low pressure, 29.30 inches, will track
across northern ontario late today and tonight, driving a slow
moving cold front across the great lakes region tonight into
wednesday. this system will provide showers and few thunderstorms
to the lakes. high pressure will expand into the region from the
west thursday into friday.


lhz362-363-082145-
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-
935 am edt tue sep 8 2026

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


$$

fzus63 kdtx 081335
glflh 
expires:202609082145;;111876

open lake forecast for lake huron
national weather service detroit/pontiac mi
935 am edt tue sep 8 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, 30.2 inches, will reside across the
eastern great lakes today. low pressure, 29.30 inches, will track
across northern ontario late today and tonight, driving a slow
moving cold front across the great lakes region tonight into
wednesday. this system will provide showers and few thunderstorms
to the lakes. high pressure will expand into the region from the
west thursday into friday.


lhz462>464-082145-
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-
935 am edt tue sep 8 2026

.rest of today...southeast winds 5 to 10 knots. waves 2 feet or
less. 
.tonight...southeast winds 10 to 15 knots veering to the south
early in the morning. a chance of showers. waves 1 to 3 feet
building to 2 to 4 feet after midnight. 
.wednesday...southwest winds 10 to 15 knots increasing to 15 to
20 knots early in the afternoon. showers likely in the morning...
then a chance of showers in the afternoon. waves 1 to 3 feet
building to 2 to 4 feet in the late morning and afternoon. 
.wednesday night...southwest winds 15 to 20 knots becoming west
10 to 15 knots in the late evening and overnight. a chance of
showers in the evening. waves 2 to 4 feet subsiding to 1 to
3 feet after midnight. 
.thursday...northwest winds 5 to 10 knots. waves 1 to 3 feet. 
.friday...northwest winds 5 to 10 knots early in the morning
becoming light and variable...then becoming east 5 to 10 knots
early in the evening becoming southeast 10 to 15 knots. waves
1 to 3 feet. 
.saturday...south winds 10 to 15 knots veering to the southwest
by midnight. waves 1 to 3 feet. 


$$

fzus63 kmkx 081359
glflm 
expires:202609082130;;112365

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
859 am cdt tue sep 8 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...

29.4 inch low pressure is centered over the canadian great plains
this morning, with 30.4 inch high pressure positioned along the
eastern shores of the hudson bay. generally light southerly winds
thus prevail across the open waters. southerly winds will increase
today into tonight as the aforementioned low shifts northeast 
toward the hudson bay. a cold front will move across lake michigan
on wednesday, bringing a generally westerly wind shift across the
lake. periods of showers and occasional thunderstorms will
accompany the approaching/passing surface front this afternoon
through wednesday morning. severe weather isn't expected.

a new area of 30.1 inch high pressure will move from the northern
great plains across lake michigan wednesday night through thursday
night, bringing a period of light and variable winds to the
waters. the next area of 29.3 inch low pressure will shift from
the canadian great plains across the hudson bay friday afternoon
through saturday night, bringing increasing southwest winds. a few
gale force gusts are possible during this time frame, particularly
over the northern third of lake michigan. will be monitoring
trends through late week for possible headlines. a cold front will
move over lake michigan sunday morning, bringing a northwest wind
shift to the waters.


lmz261-362-364-366-563-565-567-868-082130-
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-
859 am cdt tue sep 8 2026

sheboygan wi to pentwater mi north...

.rest of today...south winds 10 to 20 kt increasing to 30 kt.
chance of showers through mid morning, then slight chance of
showers this afternoon. waves 4 to 6 ft occasionally to 8 ft. 
.tonight...south winds to 30 kt becoming southwest. chance of
showers and thunderstorms. waves 4 to 6 ft occasionally to 8 ft. 
.wednesday...southwest winds to 30 kt. chance of showers in the
morning. waves 4 to 6 ft occasionally to 8 ft. 
.wednesday night...west winds to 30 kt becoming northwest 15 to
25 kt. waves 3 to 5 ft. 
.thursday...northwest winds 10 to 20 kt. waves 2 to 4 ft. 
.thursday night...southwest winds 10 to 15 kt becoming south.
waves 1 to 2 ft. 
.friday...south winds 15 to 25 kt increasing to 30 kt. waves 2 to
4 ft building to 4 to 6 ft occasionally to 8 ft.
.saturday...southwest gales to 35 kt diminishing to 30 kt. chance
of showers. waves 5 to 8 ft occasionally to 10 ft subsiding to
4 to 7 ft occasionally to 9 ft.  

$$

fzus63 kmkx 081359
glflm 
expires:202609082130;;112366

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
859 am cdt tue sep 8 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...

29.4 inch low pressure is centered over the canadian great plains
this morning, with 30.4 inch high pressure positioned along the
eastern shores of the hudson bay. generally light southerly winds
thus prevail across the open waters. southerly winds will increase
today into tonight as the aforementioned low shifts northeast 
toward the hudson bay. a cold front will move across lake michigan
on wednesday, bringing a generally westerly wind shift across the
lake. periods of showers and occasional thunderstorms will
accompany the approaching/passing surface front this afternoon
through wednesday morning. severe weather isn't expected.

a new area of 30.1 inch high pressure will move from the northern
great plains across lake michigan wednesday night through thursday
night, bringing a period of light and variable winds to the
waters. the next area of 29.3 inch low pressure will shift from
the canadian great plains across the hudson bay friday afternoon
through saturday night, bringing increasing southwest winds. a few
gale force gusts are possible during this time frame, particularly
over the northern third of lake michigan. will be monitoring
trends through late week for possible headlines. a cold front will
move over lake michigan sunday morning, bringing a northwest wind
shift to the waters.


lmz080-669-671-673-675-777-779-870-872-874-876-878-082130-
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-
859 am cdt tue sep 8 2026

sheboygan wi to pentwater mi south...

.rest of today...south winds 10 to 20 kt increasing to 15 to
25 kt. chance of showers through mid morning. waves 3 to 5 ft. 
.tonight...south winds 15 to 25 kt becoming southwest. slight
chance of showers and thunderstorms in the evening, then chance
of showers and slight chance of thunderstorms overnight. waves
3 to 5 ft. 
.wednesday...southwest winds 15 to 25 kt becoming west 10 to
20 kt. showers likely in the morning. waves 4 to 6 ft
occasionally to 8 ft subsiding to 3 to 5 ft. 
.wednesday night...west winds 10 to 20 kt becoming northwest.
waves 2 to 4 ft. 
.thursday...northwest winds 10 to 20 kt becoming north. waves
2 to 4 ft. 
.thursday night...north winds 5 to 10 kt veering to southeast
10 to 15 kt. waves 1 to 3 ft subsiding to 1 to 2 ft. 
.friday...south winds 10 to 20 kt increasing to 30 kt. waves 2 to
4 ft building to 4 to 6 ft occasionally to 8 ft.
.saturday...southwest winds to 30 kt becoming west. waves 5 to
8 ft occasionally to 10 ft subsiding to 4 to 7 ft occasionally to
9 ft.  

$$

fzus63 kmqt 081401
glfls 
expires:202609082000;;112480

open lake forecast for lake superior
national weather service marquette mi
1001 am edt tue sep 8 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...

this morning, a 29.5 inch low currently over the canadian prairies 
swings northeast toward northern quebec, deepening to 29.1 by the 
time it reaches hudson bay wednesday afternoon. this sends a 29.8 
inch trough over lake superior and drives gusty surface southerly 
flow on lake superior through tuesday evening, at which point winds 
shift west with frontal passage. strong postfrontal westerlies 
persist until thursday morning; widespread gale-force winds are 
anticipated. ridging to 30.0 inches and subsequent calmer conditions 
follow until friday morning, when a trough of 29.3 inches tracks 
from the great plains north toward hudson bay. friday through 
saturday morning, a tight pressure gradient between 29.6 and 29.9 
inches sits over lake superior as the plains shifts rapidly north, 
tracking through minnesota. expect breezy southerly flow friday 
afternoon through saturday morning as a result of this low's 
passage, and strong westerlies throughout the day on saturday as 
pressure. ridging begins to build back in saturday, reaching 29.9 
inches by sunday morning.




lsz267-082000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
1001 am edt tue sep 8 2026

...gale watch in effect from wednesday afternoon through late
wednesday night...

.rest of today...south winds 15 to 25 knots increasing to 20 to
30 knots late. a chance of showers. a slight chance of
thunderstorms by mid afternoon. waves 1 to 3 feet building to
3 to 5 feet occasionally to 7 feet. 
.tonight...south winds 20 to 30 knots veering southwest late. a
chance of showers and a slight chance of thunderstorms. waves
building to 3 to 6 feet occasionally to 8 feet. 
.wednesday...west winds 15 to 25 knots increasing to gales to
40 knots in the afternoon. waves building to 9 to 12 feet
occasionally to 15 feet. 
.wednesday night...west gales to 40 knots becoming northwest
gales to 35 knots after midnight. waves subsiding to 6 to 9 feet
occasionally to 11 feet. 
.thursday...northwest winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. waves subsiding to 2 to 4 feet. 
.thursday night...west winds 5 to 15 knots becoming south 10 to
20 knots after midnight. waves subsiding to calm to 2 feet. 
.friday...south winds 15 to 25 knots increasing to 20 to
30 knots. showers likely. waves building to 4 to 7 feet
occasionally to 9 feet. 
.saturday...west winds 20 to 30 knots. a chance of showers. waves
building to 5 to 8 feet occasionally to 10 feet, then subsiding
to 3 to 5 feet occasionally to 7 feet. 

$$

fzus63 kmqt 081401
glfls 
expires:202609082000;;112475

open lake forecast for lake superior
national weather service marquette mi
1001 am edt tue sep 8 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...

this morning, a 29.5 inch low currently over the canadian prairies 
swings northeast toward northern quebec, deepening to 29.1 by the 
time it reaches hudson bay wednesday afternoon. this sends a 29.8 
inch trough over lake superior and drives gusty surface southerly 
flow on lake superior through tuesday evening, at which point winds 
shift west with frontal passage. strong postfrontal westerlies 
persist until thursday morning; widespread gale-force winds are 
anticipated. ridging to 30.0 inches and subsequent calmer conditions 
follow until friday morning, when a trough of 29.3 inches tracks 
from the great plains north toward hudson bay. friday through 
saturday morning, a tight pressure gradient between 29.6 and 29.9 
inches sits over lake superior as the plains shifts rapidly north, 
tracking through minnesota. expect breezy southerly flow friday 
afternoon through saturday morning as a result of this low's 
passage, and strong westerlies throughout the day on saturday as 
pressure. ridging begins to build back in saturday, reaching 29.9 
inches by sunday morning.




lsz162-082000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 am edt tue sep 8 2026 /901 am cdt tue sep 8 2026/

...gale watch in effect from wednesday morning through wednesday
afternoon...

.rest of today...south winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon. a slight chance of showers. waves 2 to
4 feet subsiding to 1 to 3 feet. 
.tonight...southwest winds 20 to 30 knots veering west after
midnight. waves building to 3 to 5 feet occasionally to 7 feet. 
.wednesday...west gales to 35 knots. waves building to 4 to
7 feet occasionally to 9 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet. 
.wednesday night...west winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. waves subsiding to calm to 2 feet. 
.thursday...west winds 5 to 15 knots backing south by mid
afternoon. waves 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...south gales to 35 knots veering west. a chance of
showers, then showers likely. waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 2 to 4 feet. 
.saturday...west gales to 35 knots diminishing to 20 to 30 knots.
waves building to 3 to 6 feet occasionally to 8 feet, then
subsiding to calm to 2 feet. 

$$

fzus63 kmqt 081401
glfls 
expires:202609082000;;112476

open lake forecast for lake superior
national weather service marquette mi
1001 am edt tue sep 8 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...

this morning, a 29.5 inch low currently over the canadian prairies 
swings northeast toward northern quebec, deepening to 29.1 by the 
time it reaches hudson bay wednesday afternoon. this sends a 29.8 
inch trough over lake superior and drives gusty surface southerly 
flow on lake superior through tuesday evening, at which point winds 
shift west with frontal passage. strong postfrontal westerlies 
persist until thursday morning; widespread gale-force winds are 
anticipated. ridging to 30.0 inches and subsequent calmer conditions 
follow until friday morning, when a trough of 29.3 inches tracks 
from the great plains north toward hudson bay. friday through 
saturday morning, a tight pressure gradient between 29.6 and 29.9 
inches sits over lake superior as the plains shifts rapidly north, 
tracking through minnesota. expect breezy southerly flow friday 
afternoon through saturday morning as a result of this low's 
passage, and strong westerlies throughout the day on saturday as 
pressure. ridging begins to build back in saturday, reaching 29.9 
inches by sunday morning.




lsz263-082000-
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 tue sep 8 2026

...gale watch in effect from wednesday morning through wednesday
evening...

.rest of today...south winds 20 to 30 knots increasing to gales
to 35 knots in the afternoon, then diminishing to 20 to 30 knots
late. a chance of showers. waves 3 to 6 feet occasionally to
8 feet, then subsiding to 2 to 4 feet. 
.tonight...southwest winds 20 to 30 knots increasing to gales to
35 knots after midnight, then veering west late. waves building
to 4 to 7 feet occasionally to 9 feet. 
.wednesday...west gales to 40 knots. waves building to 8 to
11 feet occasionally to 14 feet, then subsiding to 6 to 9 feet
occasionally to 11 feet. 
.wednesday night...west gales to 35 knots becoming northwest
15 to 25 knots after midnight. waves subsiding to 2 to 4 feet. 
.thursday...northwest winds 10 to 20 knots backing southwest by
mid afternoon. waves subsiding to calm to 2 feet. 
.thursday night...south winds 10 to 20 knots increasing to 20 to
30 knots after midnight. waves building to 2 to 4 feet. 
.friday...south gales to 40 knots. a chance of showers, then
showers likely. waves building to 3 to 6 feet occasionally to
8 feet. 
.saturday...west gales to 40 knots. waves building to 5 to 8 feet
occasionally to 10 feet, then subsiding to 1 to 3 feet. 

$$

fzus63 kmqt 081401
glfls 
expires:202609082000;;112477

open lake forecast for lake superior
national weather service marquette mi
1001 am edt tue sep 8 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...

this morning, a 29.5 inch low currently over the canadian prairies 
swings northeast toward northern quebec, deepening to 29.1 by the 
time it reaches hudson bay wednesday afternoon. this sends a 29.8 
inch trough over lake superior and drives gusty surface southerly 
flow on lake superior through tuesday evening, at which point winds 
shift west with frontal passage. strong postfrontal westerlies 
persist until thursday morning; widespread gale-force winds are 
anticipated. ridging to 30.0 inches and subsequent calmer conditions 
follow until friday morning, when a trough of 29.3 inches tracks 
from the great plains north toward hudson bay. friday through 
saturday morning, a tight pressure gradient between 29.6 and 29.9 
inches sits over lake superior as the plains shifts rapidly north, 
tracking through minnesota. expect breezy southerly flow friday 
afternoon through saturday morning as a result of this low's 
passage, and strong westerlies throughout the day on saturday as 
pressure. ridging begins to build back in saturday, reaching 29.9 
inches by sunday morning.




lsz264-082000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
1001 am edt tue sep 8 2026

...gale watch in effect from wednesday morning through wednesday
evening...

.rest of today...south winds 15 to 25 knots increasing to gales
to 35 knots in the afternoon, then diminishing to 20 to 30 knots
late. showers likely and a slight chance of thunderstorms by late
morning, then a slight chance of showers by mid afternoon. waves
3 to 5 feet occasionally to 7 feet building to 5 to 8 feet
occasionally to 10 feet, then subsiding to 4 to 7 feet
occasionally to 9 feet. 
.tonight...south winds 20 to 30 knots veering southwest after
midnight, then becoming west gales to 35 knots late. a slight
chance of showers and thunderstorms through midnight. waves
subsiding to 3 to 5 feet occasionally to 7 feet, then building to
4 to 7 feet occasionally to 9 feet. 
.wednesday...west gales to 40 knots. waves building to 8 to
12 feet occasionally to 15 feet. 
.wednesday night...west gales to 35 knots becoming northwest
15 to 25 knots after midnight. waves subsiding to 2 to 4 feet. 
.thursday...northwest winds 10 to 20 knots becoming southwest
5 to 15 knots by mid afternoon. waves subsiding to calm to
2 feet. 
.thursday night...south winds 5 to 15 knots increasing to 15 to
25 knots after midnight. waves building to 1 to 3 feet. 
.friday...south winds 20 to 30 knots increasing to gales to
35 knots. showers likely. waves building to 3 to 6 feet
occasionally to 8 feet. 
.saturday...west gales to 40 knots. waves building to 5 to 8 feet
occasionally to 10 feet, then subsiding to 2 to 4 feet. 

$$

fzus63 kmqt 081401
glfls 
expires:202609082000;;112478

open lake forecast for lake superior
national weather service marquette mi
1001 am edt tue sep 8 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...

this morning, a 29.5 inch low currently over the canadian prairies 
swings northeast toward northern quebec, deepening to 29.1 by the 
time it reaches hudson bay wednesday afternoon. this sends a 29.8 
inch trough over lake superior and drives gusty surface southerly 
flow on lake superior through tuesday evening, at which point winds 
shift west with frontal passage. strong postfrontal westerlies 
persist until thursday morning; widespread gale-force winds are 
anticipated. ridging to 30.0 inches and subsequent calmer conditions 
follow until friday morning, when a trough of 29.3 inches tracks 
from the great plains north toward hudson bay. friday through 
saturday morning, a tight pressure gradient between 29.6 and 29.9 
inches sits over lake superior as the plains shifts rapidly north, 
tracking through minnesota. expect breezy southerly flow friday 
afternoon through saturday morning as a result of this low's 
passage, and strong westerlies throughout the day on saturday as 
pressure. ridging begins to build back in saturday, reaching 29.9 
inches by sunday morning.




lsz265-082000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
1001 am edt tue sep 8 2026

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

.rest of today...south winds 20 to 30 knots increasing to gales
to 35 knots in the afternoon. showers likely by late morning. a
slight chance of thunderstorms. a chance of showers by mid
afternoon. waves 2 to 4 feet building to 4 to 7 feet occasionally
to 9 feet, then subsiding to 3 to 5 feet occasionally to 7 feet. 
.tonight...south winds 20 to 30 knots veering west late. a slight
chance of showers through midnight. waves subsiding to 2 to
4 feet. 
.wednesday...west gales to 45 knots. waves building to 6 to
10 feet occasionally to 13 feet. 
.wednesday night...west gales to 40 knots becoming northwest
20 to 30 knots after midnight. waves subsiding to 3 to 5 feet
occasionally to 7 feet. 
.thursday...northwest winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. waves subsiding to calm to 2 feet. 
.thursday night...south winds 5 to 15 knots increasing to 15 to
25 knots after midnight. waves building to 1 to 3 feet. 
.friday...south winds 20 to 30 knots increasing to gales to
35 knots. showers likely. waves building to 3 to 6 feet
occasionally to 8 feet. 
.saturday...west gales to 40 knots diminishing to 20 to 30 knots.
waves building to 5 to 8 feet occasionally to 10 feet, then
subsiding to 2 to 4 feet. 

$$

fzus63 kmqt 081401
glfls 
expires:202609082000;;112479

open lake forecast for lake superior
national weather service marquette mi
1001 am edt tue sep 8 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...

this morning, a 29.5 inch low currently over the canadian prairies 
swings northeast toward northern quebec, deepening to 29.1 by the 
time it reaches hudson bay wednesday afternoon. this sends a 29.8 
inch trough over lake superior and drives gusty surface southerly 
flow on lake superior through tuesday evening, at which point winds 
shift west with frontal passage. strong postfrontal westerlies 
persist until thursday morning; widespread gale-force winds are 
anticipated. ridging to 30.0 inches and subsequent calmer conditions 
follow until friday morning, when a trough of 29.3 inches tracks 
from the great plains north toward hudson bay. friday through 
saturday morning, a tight pressure gradient between 29.6 and 29.9 
inches sits over lake superior as the plains shifts rapidly north, 
tracking through minnesota. expect breezy southerly flow friday 
afternoon through saturday morning as a result of this low's 
passage, and strong westerlies throughout the day on saturday as 
pressure. ridging begins to build back in saturday, reaching 29.9 
inches by sunday morning.




lsz266-082000-
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 tue sep 8 2026

...gale warning in effect until 8 pm edt this evening...
...gale watch in effect from wednesday afternoon through late
wednesday night...

.rest of today...south winds 20 to 30 knots increasing to gales
to 40 knots in the afternoon. showers likely by late morning. a
slight chance of thunderstorms. a chance of showers by mid
afternoon. waves 3 to 5 feet occasionally to 7 feet building to
5 to 8 feet occasionally to 10 feet, then subsiding to 4 to
7 feet occasionally to 9 feet. 
.tonight...south gales to 35 knots diminishing to 20 to 30 knots
after midnight, then veering southwest late. a slight chance of
thunderstorms through midnight. a slight chance of showers. waves
building to 5 to 8 feet occasionally to 10 feet, then subsiding
to 3 to 6 feet occasionally to 8 feet. 
.wednesday...west gales to 40 knots. waves building to 8 to
12 feet occasionally to 15 feet. 
.wednesday night...west gales to 40 knots becoming northwest
20 to 30 knots after midnight. waves subsiding to 4 to 7 feet
occasionally to 9 feet. 
.thursday...northwest winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. waves subsiding to 1 to 3 feet. 
.thursday night...south winds 5 to 15 knots increasing to 15 to
25 knots after midnight. waves subsiding to calm to 2 feet, then
building to 1 to 3 feet. 
.friday...south gales to 40 knots. showers likely. waves building
to 5 to 8 feet occasionally to 10 feet. 
.saturday...west gales to 40 knots diminishing to 20 to 30 knots.
a chance of showers. waves subsiding to 3 to 5 feet occasionally
to 7 feet. 

$$