fzus63 kdtx 151352
glflh 
expires:202609152200;;492765

open lake forecast for lake huron
national weather service detroit/pontiac mi
952 am edt tue sep 15 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...low pressure, 29.30 inches, tracks across northern
ontario today which elevates wind gusts to gale force across
central and northern lake huron. a gale warning is in effect
there through this afternoon. the low pressure system ushers a
weak cold front across the region tuesday night, then high
pressure passes across northern ontario on wednesday.


lhz361-152200-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
952 am edt tue sep 15 2026

...gale warning in effect until 4 pm edt this afternoon...

.rest of today...south winds 20 to 25 knots decreasing to 15 to
20 knots in the afternoon. gusts to 35 knot gales. waves 6 to
9 feet. waves occasionally around 12 feet. 
.tonight...southwest winds 10 to 15 knots veering to the
northwest by midnight...then decreasing to 5 to 10 knots early in
the morning. waves 3 to 5 feet subsiding to 1 to 3 feet early in
the morning. 
.wednesday...northwest winds 5 to 10 knots early in the morning
becoming light and variable. waves 2 feet or less. 
.wednesday night...light and variable winds. waves 2 feet or
less. 
.thursday...light and variable winds becoming west 5 to 10 knots
late in the afternoon...then becoming northwest 10 to 15 knots
late in the evening. waves 2 feet or less. 
.friday...north winds 10 to 15 knots becoming northeast 5 to
10 knots in the late morning and early afternoon...then becoming
light and variable early in the evening becoming southeast 10 to
15 knots by midnight. a chance of. waves 2 feet or less. 
.saturday...southeast winds 15 to 20 knots with gusts to around
30 knots. showers likely. a chance of showers by midnight. waves
3 to 5 feet building to 5 to 7 feet. waves occasionally around
10 feet. 


$$

fzus63 kdtx 151352
glflh 
expires:202609152200;;492767

open lake forecast for lake huron
national weather service detroit/pontiac mi
952 am edt tue sep 15 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...low pressure, 29.30 inches, tracks across northern
ontario today which elevates wind gusts to gale force across
central and northern lake huron. a gale warning is in effect
there through this afternoon. the low pressure system ushers a
weak cold front across the region tuesday night, then high
pressure passes across northern ontario on wednesday.


lhz462>464-152200-
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-
952 am edt tue sep 15 2026

.rest of today...south winds 20 to 25 knots decreasing to 15 to
20 knots late in the afternoon. gusts to 35 knot gales. a chance
of showers late in the morning. waves 6 to 9 feet. waves
occasionally around 12 feet. 
.tonight...southwest winds 10 to 15 knots decreasing to 5 to
10 knots late in the evening...then veering to the west after
midnight becoming west 5 to 10 knots early in the morning. waves
3 to 5 feet subsiding to 1 to 3 feet in the late evening and
overnight. 
.wednesday...north winds 10 to 15 knots. waves 1 to 3 feet. 
.wednesday night...northeast winds 5 to 10 knots. a chance of
showers after midnight. waves 2 feet or less. 
.thursday...north winds 5 to 10 knots increasing to 10 to
15 knots late in the evening. a chance of showers. waves 2 feet
or less. 
.friday...north winds 10 to 15 knots veering to the northeast by
midnight. waves 2 to 4 feet. 
.saturday...southeast winds 10 to 15 knots increasing to 15 to
20 knots. showers likely and a chance of thunderstorms. waves
3 to 5 feet. 


$$

fzus63 kdtx 151352
glflh 
expires:202609152200;;492766

open lake forecast for lake huron
national weather service detroit/pontiac mi
952 am edt tue sep 15 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...low pressure, 29.30 inches, tracks across northern
ontario today which elevates wind gusts to gale force across
central and northern lake huron. a gale warning is in effect
there through this afternoon. the low pressure system ushers a
weak cold front across the region tuesday night, then high
pressure passes across northern ontario on wednesday.


lhz362-363-152200-
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-
952 am edt tue sep 15 2026

...gale warning in effect until 4 pm edt this afternoon...

.rest of today...south winds to 30 knots decreasing to 20 to
25 knots late in the afternoon. gusts to 40 knot gales. a chance
of showers late in the morning. waves 10 to 14 feet. waves
occasionally around 18 feet. 
.tonight...southwest winds 10 to 15 knots veering to the
northwest after midnight...then veering to the northwest 10 to
15 knots early in the morning. waves 5 to 7 feet subsiding to
2 to 4 feet after midnight. waves occasionally around 10 feet. 
.wednesday...north winds 5 to 10 knots. waves 1 to 3 feet. 
.wednesday night...light and variable winds. waves 2 feet or
less. 
.thursday...light and variable winds becoming north 5 to 10 knots
late in the afternoon...then becoming northwest 10 to 15 knots
late in the evening. waves 2 feet or less. 
.friday...north winds 10 to 15 knots veering to the northeast in
the late morning and early afternoon...then decreasing to 5 to
10 knots early in the evening becoming east 10 to 15 knots by
midnight. a chance of. waves 1 to 3 feet. 
.saturday...southeast winds 10 to 15 knots increasing to 15 to
20 knots with gusts to around 30 knots. showers likely. a chance
of thunderstorms. a chance of showers by midnight. waves 2 to
4 feet building to 4 to 6 feet. waves occasionally around 8 feet.


$$

fzus63 kmkx 151348
glflm 
expires:202609152130;;492725

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
848 am cdt tue sep 15 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...

a gale warning is in effect through 1 pm cdt for the northern 
third of the lake, with south to southwest winds of 20-25 kt with
a few gusts up to 35 kt. isolated gales may continue for a few 
hours after the expiration time, but will gradually diminish as 
low pressure around 29.3 inches tracks into hudson bay this 
afternoon. a trailing cold front with isolated thunderstorms ahead
of it will slow and weaken as it moves across the lake early this
evening, turning winds to northwesterly. winds will shift to 
northeasterly by early wednesday morning as high pressure around 
30.4 inches moves across the northern great lakes. lighter and 
variable winds will then prevail wednesday night into friday until
stronger southerly winds return friday night and saturday ahead 
of another low pressure area approaching from the great plains.


lmz080-669-671-673-675-777-779-870-872-874-876-878-152130-
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-
848 am cdt tue sep 15 2026

sheboygan wi to pentwater mi south...

.rest of today...south winds to 30 kt becoming southwest 15 to
25 kt. showers and slight chance of thunderstorms through mid
morning, then slight chance of showers and thunderstorms this
afternoon. waves 8 to 12 ft occasionally to 16 ft subsiding to
7 to 10 ft occasionally to 13 ft. 
.tonight...northwest winds 10 to 20 kt veering to northeast.
slight chance of showers and thunderstorms in the evening, then
slight chance of showers overnight. waves 4 to 6 ft occasionally
to 8 ft subsiding to 3 to 5 ft. 
.wednesday...northeast winds 10 to 20 kt diminishing to 10 to
15 kt. chance of showers in the morning. waves 3 to 5 ft
subsiding to 2 to 4 ft. 
.wednesday night...east winds 10 to 20 kt becoming southeast
10 to 15 kt. chance of showers. waves 1 to 3 ft. 
.thursday...northwest winds 10 to 15 kt becoming north. chance of
showers in the morning. waves 1 to 2 ft. 
.thursday night...northeast winds 10 to 20 kt diminishing to
10 to 15 kt. waves 2 to 4 ft. 
.friday...east winds 10 to 15 kt. chance of showers. waves 3 to
5 ft. 
.saturday...south winds to 30 kt. showers likely with a chance of
thunderstorms. waves 8 to 11 ft occasionally to 14 ft. 

$$

fzus63 kmkx 151348
glflm 
expires:202609152130;;492723

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
848 am cdt tue sep 15 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...

a gale warning is in effect through 1 pm cdt for the northern 
third of the lake, with south to southwest winds of 20-25 kt with
a few gusts up to 35 kt. isolated gales may continue for a few 
hours after the expiration time, but will gradually diminish as 
low pressure around 29.3 inches tracks into hudson bay this 
afternoon. a trailing cold front with isolated thunderstorms ahead
of it will slow and weaken as it moves across the lake early this
evening, turning winds to northwesterly. winds will shift to 
northeasterly by early wednesday morning as high pressure around 
30.4 inches moves across the northern great lakes. lighter and 
variable winds will then prevail wednesday night into friday until
stronger southerly winds return friday night and saturday ahead 
of another low pressure area approaching from the great plains.


lmz261-362-364-563-152130-
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 rock island passage to sturgeon bay wi-
848 am cdt tue sep 15 2026

sturgeon bay wi to point betsie mi north...

...gale warning in effect until 1 pm cdt this afternoon...

.rest of today...south gales to 35 kt becoming southwest. slight 
chance of showers through mid morning. waves 10 to 14 ft 
occasionally to 18 ft subsiding to 6 to 9 ft occasionally to 12 
ft. 
.tonight...northwest winds to 30 kt diminishing to 10 to 20 kt
late in the evening, then becoming northwest 10 to 20 kt after
midnight becoming north 10 to 15 kt late. waves 4 to 7 ft
occasionally to 9 ft subsiding to 2 to 4 ft. 
.wednesday...north winds 5 to 10 kt becoming northeast. waves
1 to 3 ft subsiding to 1 ft or less. 
.wednesday night...east winds 10 to 15 kt becoming southeast.
waves 1 ft or less. 
.thursday...south winds 10 to 15 kt veering to northwest. waves
nearly calm. 
.thursday night...north winds 10 to 15 kt becoming northeast 5 to
10 kt. waves 1 to 2 ft. 
.friday...east winds 5 to 10 kt. waves 1 to 2 ft. 
.saturday...southeast winds to 30 kt. showers likely with a 
chance of thunderstorms. waves 5 to 8 ft occasionally to 10 ft.


$$

fzus63 kmkx 151348
glflm 
expires:202609152130;;492724

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
848 am cdt tue sep 15 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...

a gale warning is in effect through 1 pm cdt for the northern 
third of the lake, with south to southwest winds of 20-25 kt with
a few gusts up to 35 kt. isolated gales may continue for a few 
hours after the expiration time, but will gradually diminish as 
low pressure around 29.3 inches tracks into hudson bay this 
afternoon. a trailing cold front with isolated thunderstorms ahead
of it will slow and weaken as it moves across the lake early this
evening, turning winds to northwesterly. winds will shift to 
northeasterly by early wednesday morning as high pressure around 
30.4 inches moves across the northern great lakes. lighter and 
variable winds will then prevail wednesday night into friday until
stronger southerly winds return friday night and saturday ahead 
of another low pressure area approaching from the great plains.


lmz366-565-567-868-152130-
lake michigan from point betsie to manistee mi 5 nm offshore to
mid lake-
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-
848 am cdt tue sep 15 2026

sturgeon bay wi to point betsie mi south to sheboygan wi to
pentwater mi...

.rest of today...south winds to 30 kt becoming southwest, then 
diminishing to 15 to 25 kt late. chance of showers and slight 
chance of thunderstorms through mid morning. waves 10 to 14 ft 
occasionally to 18 ft subsiding to 6 to 9 ft occasionally to 12 
ft. 
.tonight...west winds 10 to 20 kt veering to north. waves 4 to
7 ft occasionally to 9 ft subsiding to 2 to 4 ft. 
.wednesday...northeast winds 10 to 15 kt diminishing to 5 to
10 kt. waves 2 to 4 ft subsiding to 1 to 3 ft. 
.wednesday night...east winds 10 to 15 kt becoming southeast.
waves 1 to 2 ft. 
.thursday...northeast winds 10 to 15 kt becoming north. waves
1 to 2 ft. 
.thursday night...northeast winds 10 to 15 kt. waves 1 to 3 ft. 
.friday...east winds 10 to 15 kt. chance of showers. waves 1 to
3 ft. 
.saturday...southeast winds to 30 kt becoming south. showers with
a chance of thunderstorms. waves 8 to 11 ft occasionally to 14 
ft.


$$

fzus63 kmqt 150801
glfls 
expires:202609152000;;480098

open lake forecast for lake superior
national weather service marquette mi
400 am edt tue sep 15 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 29.3 inch low currently over manitoba moves to southern hudson bay 
at 29.4 inches by this afternoon, bringing 29.7 inch troughing 
across lake superior. meanwhile, 30.2 inch high pressure develops 
over the northern plains this afternoon, strengthening to 30.4 
inches as it crosses the upper great lakes on wednesday. high 
pressure ridging of 30.2 to 30.3 inches then looks to remain over 
lake superior through the rest of the workweek. 




lsz265-152000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
400 am edt tue sep 15 2026

...gale warning in effect through this evening...

.early this morning...south gales to 40 knots. waves 4 to 8 feet
occasionally to 10 feet. 
.today...southwest gales to 35 knots becoming west gales to
40 knots in the afternoon. waves subsiding to 3 to 6 feet
occasionally to 8 feet, then building to 7 to 10 feet
occasionally to 13 feet. 
.tonight...west winds 20 to 30 knots diminishing to 15 to
25 knots after midnight, then becoming northwest 10 to 20 knots
late. waves subsiding to calm to 2 feet. 
.wednesday...northwest winds 5 to 15 knots veering north in the
afternoon, then veering east late. waves calm to 2 feet. 
.wednesday night...southeast winds 10 to 20 knots veering south
after midnight. waves calm to 2 feet. 
.thursday...west winds 10 to 20 knots veering northwest by mid
afternoon. waves calm to 2 feet. 
.thursday night...north winds 10 to 20 knots veering northeast
after midnight. waves calm to 2 feet. 
.friday...east winds 15 to 25 knots becoming southeast 20 to
30 knots. a chance of showers. waves building to 3 to 5 feet
occasionally to 7 feet. 
.saturday...southeast gales to 40 knots becoming northeast 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 150801
glfls 
expires:202609152000;;480097

open lake forecast for lake superior
national weather service marquette mi
400 am edt tue sep 15 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 29.3 inch low currently over manitoba moves to southern hudson bay 
at 29.4 inches by this afternoon, bringing 29.7 inch troughing 
across lake superior. meanwhile, 30.2 inch high pressure develops 
over the northern plains this afternoon, strengthening to 30.4 
inches as it crosses the upper great lakes on wednesday. high 
pressure ridging of 30.2 to 30.3 inches then looks to remain over 
lake superior through the rest of the workweek. 




lsz264-152000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
400 am edt tue sep 15 2026

...gale warning in effect from 8 am edt this morning through this
evening...

.early this morning...south winds 20 to 30 knots. waves 6 to
10 feet occasionally to 13 feet. 
.today...southwest gales to 45 knots veering west in the
afternoon. waves subsiding to 5 to 8 feet occasionally to
10 feet, then building to 10 to 14 feet occasionally to 18 feet. 
.tonight...west winds 20 to 30 knots diminishing to 10 to
20 knots after midnight, then becoming northwest 5 to 15 knots
late. waves subsiding to 1 to 3 feet. 
.wednesday...northwest winds 5 to 15 knots becoming north less
than 10 knots in the afternoon, then veering southeast late.
waves subsiding to calm to 2 feet. 
.wednesday night...south winds 5 to 15 knots. waves calm to
2 feet. 
.thursday...west winds 5 to 15 knots. waves calm to 2 feet. 
.thursday night...north winds 5 to 15 knots veering northeast
after midnight. waves calm to 2 feet. 
.friday...east winds 10 to 20 knots becoming southeast 15 to
25 knots. a chance of showers. waves building to 2 to 4 feet. 
.saturday...east winds 20 to 30 knots becoming northeast 15 to
25 knots. a chance of showers. waves building to 3 to 6 feet
occasionally to 8 feet, then subsiding to 2 to 4 feet. 

$$

fzus63 kmqt 150801
glfls 
expires:202609152000;;480096

open lake forecast for lake superior
national weather service marquette mi
400 am edt tue sep 15 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 29.3 inch low currently over manitoba moves to southern hudson bay 
at 29.4 inches by this afternoon, bringing 29.7 inch troughing 
across lake superior. meanwhile, 30.2 inch high pressure develops 
over the northern plains this afternoon, strengthening to 30.4 
inches as it crosses the upper great lakes on wednesday. high 
pressure ridging of 30.2 to 30.3 inches then looks to remain over 
lake superior through the rest of the workweek. 




lsz263-152000-
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-
400 am edt tue sep 15 2026

...gale warning in effect from 8 am edt this morning through this
evening...

.early this morning...southwest winds 20 to 30 knots. waves 4 to
7 feet occasionally to 9 feet. 
.today...southwest gales to 45 knots veering west in the
afternoon. waves building to 10 to 14 feet occasionally to
18 feet, then subsiding to 7 to 10 feet occasionally to 13 feet. 
.tonight...west winds 15 to 25 knots diminishing to 10 to
20 knots after midnight, then veering northwest late. waves
subsiding to calm to 2 feet. 
.wednesday...north winds 5 to 15 knots becoming northeast less
than 10 knots in the afternoon, then becoming east 5 to 15 knots
late. waves calm to 2 feet. 
.wednesday night...east winds 5 to 15 knots veering south after
midnight. waves calm to 2 feet. 
.thursday...west winds 5 to 15 knots. waves calm to 2 feet. 
.thursday night...north winds 5 to 15 knots veering east after
midnight. waves calm to 2 feet. 
.friday...east winds 10 to 20 knots increasing to 15 to 25 knots.
a chance of showers. waves building to 2 to 4 feet. 
.saturday...east winds 20 to 30 knots backing northeast. a chance
of showers. waves building to 3 to 5 feet occasionally to 7 feet.

$$

fzus63 kmqt 150801
glfls 
expires:202609152000;;480095

open lake forecast for lake superior
national weather service marquette mi
400 am edt tue sep 15 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 29.3 inch low currently over manitoba moves to southern hudson bay 
at 29.4 inches by this afternoon, bringing 29.7 inch troughing 
across lake superior. meanwhile, 30.2 inch high pressure develops 
over the northern plains this afternoon, strengthening to 30.4 
inches as it crosses the upper great lakes on wednesday. high 
pressure ridging of 30.2 to 30.3 inches then looks to remain over 
lake superior through the rest of the workweek. 




lsz162-152000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am edt tue sep 15 2026 /300 am cdt tue sep 15 2026/

...gale warning in effect from 8 am edt /7 am cdt/ this morning
to 4 pm edt /3 pm cdt/ this afternoon...

.early this morning...southwest winds 20 to 30 knots. waves 3 to
6 feet occasionally to 8 feet. 
.today...southwest gales to 40 knots veering west in the
afternoon, then diminishing to 20 to 30 knots late. waves
building to 7 to 10 feet occasionally to 13 feet, then subsiding
to 3 to 5 feet occasionally to 7 feet. 
.tonight...west winds 10 to 20 knots diminishing to 5 to 15 knots
after midnight, then veering northwest late. waves subsiding to
calm to 2 feet. 
.wednesday...north winds 5 to 15 knots veering east in the
afternoon. waves calm to 2 feet. 
.wednesday night...east winds 5 to 15 knots. waves calm to
2 feet. 
.thursday...northwest winds 5 to 15 knots backing west by mid
afternoon. waves calm to 2 feet. 
.thursday night...north winds 5 to 15 knots becoming northeast
10 to 20 knots after midnight. waves calm to 2 feet. 
.friday...east winds 15 to 25 knots increasing to 20 to 30 knots.
a chance of showers. waves building to 2 to 4 feet. 
.saturday...northeast winds 20 to 30 knots. a chance of showers.
waves building to 3 to 5 feet occasionally to 7 feet. 

$$

fzus63 kmqt 150801
glfls 
expires:202609152000;;480099

open lake forecast for lake superior
national weather service marquette mi
400 am edt tue sep 15 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 29.3 inch low currently over manitoba moves to southern hudson bay 
at 29.4 inches by this afternoon, bringing 29.7 inch troughing 
across lake superior. meanwhile, 30.2 inch high pressure develops 
over the northern plains this afternoon, strengthening to 30.4 
inches as it crosses the upper great lakes on wednesday. high 
pressure ridging of 30.2 to 30.3 inches then looks to remain over 
lake superior through the rest of the workweek. 




lsz266-152000-
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-
400 am edt tue sep 15 2026

...gale warning in effect through this evening...

.early this morning...south gales to 40 knots. a slight chance of
showers. waves 8 to 11 feet occasionally to 14 feet. 
.today...south gales to 35 knots becoming west gales to 40 knots
in the afternoon. waves subsiding to 5 to 8 feet occasionally to
10 feet, then building to 10 to 14 feet occasionally to 18 feet. 
.tonight...west gales to 35 knots diminishing to 15 to 25 knots
after midnight, then becoming northwest 10 to 20 knots late.
waves subsiding to 2 to 4 feet. 
.wednesday...northwest winds 5 to 15 knots becoming north less
than 10 knots in the afternoon, then becoming east 5 to 15 knots
late. waves subsiding to calm to 2 feet. 
.wednesday night...southeast winds 5 to 15 knots veering south
after midnight. a slight chance of showers through midnight.
waves calm to 2 feet. 
.thursday...west winds 5 to 15 knots becoming northwest 10 to
20 knots by mid afternoon. waves calm to 2 feet. 
.thursday night...north winds 10 to 20 knots veering northeast
after midnight. waves calm to 2 feet. 
.friday...east winds 10 to 20 knots becoming southeast 20 to
30 knots. a chance of showers. waves building to 3 to 5 feet
occasionally to 7 feet. 
.saturday...southeast gales to 40 knots becoming northeast 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 150801
glfls 
expires:202609152000;;480100

open lake forecast for lake superior
national weather service marquette mi
400 am edt tue sep 15 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 29.3 inch low currently over manitoba moves to southern hudson bay 
at 29.4 inches by this afternoon, bringing 29.7 inch troughing 
across lake superior. meanwhile, 30.2 inch high pressure develops 
over the northern plains this afternoon, strengthening to 30.4 
inches as it crosses the upper great lakes on wednesday. high 
pressure ridging of 30.2 to 30.3 inches then looks to remain over 
lake superior through the rest of the workweek. 




lsz267-152000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
400 am edt tue sep 15 2026

...gale warning in effect until 9 am edt this morning...

.early this morning...south gales to 40 knots. a chance of
showers. waves 6 to 9 feet occasionally to 11 feet. 
.today...south gales to 35 knots becoming southwest 20 to
30 knots in the afternoon, then becoming west gales to 35 knots
late. a slight chance of showers through early afternoon. waves
subsiding to 4 to 7 feet occasionally to 9 feet, then building to
7 to 10 feet occasionally to 13 feet. 
.tonight...west gales to 35 knots becoming northwest 15 to
25 knots after midnight, then diminishing to 10 to 20 knots late.
waves subsiding to 2 to 4 feet. 
.wednesday...northwest winds 5 to 15 knots veering north late.
waves subsiding to calm to 2 feet. 
.wednesday night...southeast winds 5 to 15 knots veering south
after midnight. waves calm to 2 feet. 
.thursday...southwest winds 5 to 15 knots becoming northwest
10 to 20 knots by mid afternoon. waves calm to 2 feet. 
.thursday night...northwest winds 10 to 20 knots veering
northeast after midnight. waves building to 1 to 3 feet. 
.friday...east winds 5 to 15 knots becoming southeast 15 to
25 knots. a chance of showers. waves subsiding to calm to 2 feet,
then building to 2 to 4 feet. 
.saturday...southeast winds 20 to 30 knots backing northeast. a
chance of showers. waves building to 3 to 6 feet occasionally to
8 feet, then subsiding to 2 to 4 feet. 

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