fzus63 kdtx 290756
glflh 
expires:202609291600;;235211

open lake forecast for lake huron
national weather service detroit/pontiac mi
356 am edt tue sep 29 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...broad high pressure, 30.10 inches, drifts across the
great lakes this morning. calm winds organize out of the
southwest ahead of a more unsettled pattern to close out of the
work week. a strong cold front brings a pattern shift friday into
this weekend.


lhz361-291600-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
356 am edt tue sep 29 2026

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


$$

fzus63 kdtx 290756
glflh 
expires:202609291600;;235212

open lake forecast for lake huron
national weather service detroit/pontiac mi
356 am edt tue sep 29 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...broad high pressure, 30.10 inches, drifts across the
great lakes this morning. calm winds organize out of the
southwest ahead of a more unsettled pattern to close out of the
work week. a strong cold front brings a pattern shift friday into
this weekend.


lhz362-363-291600-
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-
356 am edt tue sep 29 2026

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


$$

fzus63 kdtx 290756
glflh 
expires:202609291600;;235213

open lake forecast for lake huron
national weather service detroit/pontiac mi
356 am edt tue sep 29 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...broad high pressure, 30.10 inches, drifts across the
great lakes this morning. calm winds organize out of the
southwest ahead of a more unsettled pattern to close out of the
work week. a strong cold front brings a pattern shift friday into
this weekend.


lhz462>464-291600-
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-
356 am edt tue sep 29 2026

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


$$

fzus63 kmkx 290815
glflm 
expires:202609291515;;236616

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
315 am cdt tue sep 29 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...

the center of high pressure of 30.1 inches will shift over lake
huron today. look for areas of fog, dense possible, over the 
northern quarter of lake michigan through the early morning hours
today, but expect it to diminish by mid morning. southerly winds 
will develop by early afternoon and continue into thursday as a 
low pressure trough 29.6 inches approaches from the northern 
plains. wind gusts to 30 knots are possible wednesday afternoon 
along with building waves, particularly across central and 
northern portions of the lake.

expect northerly winds in the wake of the trough thursday night
into friday. strong high pressure of 30.3 inches will overspread
the great lakes friday night. a fast-moving trough of 29.7 inches
should cross lake superior early sunday.


lmz261-362-364-366-563-565-567-868-291515-
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-
315 am cdt tue sep 29 2026

sheboygan wi to pentwater mi north...

.today...south winds 5 to 10 kt increasing to 10 to 20 kt. patchy
fog this morning. waves 1 to 2 ft building to 2 to 4 ft. 
.tonight...south winds 10 to 20 kt increasing to 15 to 25 kt.
slight chance of showers in the evening, then showers likely with
slight chance of thunderstorms overnight. waves 3 to 5 ft
building to 4 to 6 ft occasionally to 8 ft. 
.wednesday...south winds to 30 kt. chance of showers. waves 4 to
7 ft occasionally to 9 ft building to 6 to 9 ft occasionally to
12 ft. 
.wednesday night...southwest winds to 30 kt diminishing to 15 to
25 kt. showers likely. waves 6 to 9 ft occasionally to 12 ft
subsiding to 4 to 6 ft occasionally to 8 ft. 
.thursday...west winds 10 to 20 kt becoming northwest. chance of
showers. waves 2 to 4 ft. 
.thursday night...north winds 10 to 20 kt. waves 1 to 3 ft
building to 2 to 4 ft. 
.friday...north winds 10 to 20 kt. waves 2 to 4 ft. 
.saturday...east winds 10 to 15 kt becoming southeast. waves 1 to
3 ft.  

$$

fzus63 kmkx 290815
glflm 
expires:202609291515;;236617

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
315 am cdt tue sep 29 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...

the center of high pressure of 30.1 inches will shift over lake
huron today. look for areas of fog, dense possible, over the 
northern quarter of lake michigan through the early morning hours
today, but expect it to diminish by mid morning. southerly winds 
will develop by early afternoon and continue into thursday as a 
low pressure trough 29.6 inches approaches from the northern 
plains. wind gusts to 30 knots are possible wednesday afternoon 
along with building waves, particularly across central and 
northern portions of the lake.

expect northerly winds in the wake of the trough thursday night
into friday. strong high pressure of 30.3 inches will overspread
the great lakes friday night. a fast-moving trough of 29.7 inches
should cross lake superior early sunday.


lmz080-669-671-673-675-777-779-870-872-874-876-878-291515-
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-
315 am cdt tue sep 29 2026

sheboygan wi to pentwater mi south...

.today...south winds 5 to 10 kt increasing to 10 to 20 kt. waves
1 to 2 ft building to 2 to 4 ft. 
.tonight...south winds 10 to 20 kt. chance of showers overnight.
waves 3 to 5 ft. 
.wednesday...south winds 15 to 25 kt increasing to 30 kt. chance
of showers in the morning, then showers likely in the afternoon.
waves 4 to 7 ft occasionally to 9 ft building to 6 to 9 ft
occasionally to 12 ft. 
.wednesday night...south winds to 30 kt becoming southwest 10 to
20 kt overnight. showers. waves 5 to 8 ft occasionally to 10 ft
subsiding to 4 to 6 ft occasionally to 8 ft. 
.thursday...southwest winds 10 to 20 kt becoming northwest.
showers. waves 3 to 5 ft. 
.thursday night...north winds 10 to 20 kt. chance of showers.
waves 2 to 4 ft building to 4 to 6 ft occasionally to 8 ft.
.friday...northeast winds 10 to 20 kt becoming north 15 to 25 kt.
chance of showers. waves 4 to 7 ft occasionally to 9 ft. 
.saturday...east winds 10 to 20 kt diminishing to 10 to 15 kt.
waves 3 to 5 ft.  

$$

fzus63 kmqt 290801
glfls 
expires:202609292000;;235419

open lake forecast for lake superior
national weather service marquette mi
401 am edt tue sep 29 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...

ridging has weakened to 29.9 inches over lake superior this morning 
as 30.0 high pressure shifts east of the lake and extends from 
southern quebec to lower michigan. deep troughing of 29.3 inches is 
lifting out of the canadian rockies, with a 29.7 inch trough 
extending south through the plains. pressure will fall to 29.7 
inches over lake superior tonight and continue to deepen to 29.6 
inches on wednesday as the canadian trough strengthens into a 29.0 
inch low over hudson bay wednesday afternoon. 29.8 inch troughing 
lingers over the lake on thursday between this low and another 29.6 
low over the south plains. high pressure then builds to 30.3 inches 
over the northern plains thursday night into friday and shifts east 
to the great lakes friday night and saturday.




lsz162-292000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 am edt tue sep 29 2026 /301 am cdt tue sep 29 2026/

.early this morning...south winds 5 to 15 knots. waves calm to
2 feet. 
.today...south winds 10 to 20 knots increasing to 15 to 25 knots
in the afternoon. showers likely by mid afternoon. waves building
to 1 to 3 feet. 
.tonight...south winds 15 to 25 knots becoming southwest 10 to
20 knots after midnight. a chance of showers through midnight.
waves subsiding to calm to 2 feet. 
.wednesday...southwest winds 10 to 20 knots. waves calm to
2 feet. 
.wednesday night...southwest winds 10 to 20 knots veering
northwest after midnight. waves calm to 2 feet. 
.thursday...west winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. waves calm to 2 feet. 
.thursday night...northwest winds 10 to 20 knots. waves calm to
2 feet. 
.friday...west winds 5 to 15 knots backing south. waves calm to
2 feet. 
.saturday...south winds 5 to 15 knots becoming west 15 to
25 knots. a chance of showers. waves building to 1 to 3 feet. 

$$

fzus63 kmqt 290801
glfls 
expires:202609292000;;235420

open lake forecast for lake superior
national weather service marquette mi
401 am edt tue sep 29 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...

ridging has weakened to 29.9 inches over lake superior this morning 
as 30.0 high pressure shifts east of the lake and extends from 
southern quebec to lower michigan. deep troughing of 29.3 inches is 
lifting out of the canadian rockies, with a 29.7 inch trough 
extending south through the plains. pressure will fall to 29.7 
inches over lake superior tonight and continue to deepen to 29.6 
inches on wednesday as the canadian trough strengthens into a 29.0 
inch low over hudson bay wednesday afternoon. 29.8 inch troughing 
lingers over the lake on thursday between this low and another 29.6 
low over the south plains. high pressure then builds to 30.3 inches 
over the northern plains thursday night into friday and shifts east 
to the great lakes friday night and saturday.




lsz263-292000-
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 am edt tue sep 29 2026

.early this morning...south winds 10 to 20 knots. waves calm to
2 feet building to 1 to 3 feet. 
.today...south winds 10 to 20 knots increasing to 15 to 25 knots
in the afternoon. a chance of showers by mid afternoon. waves
building to 2 to 4 feet, then subsiding to 1 to 3 feet. 
.tonight...southwest winds 15 to 25 knots diminishing to 10 to
20 knots late. showers likely through midnight, then a slight
chance of showers after midnight. waves building to 2 to 4 feet,
then subsiding to calm to 2 feet. 
.wednesday...southwest winds 5 to 15 knots increasing to 15 to
25 knots in the afternoon. waves building to 1 to 3 feet. 
.wednesday night...southwest winds 5 to 15 knots becoming west
10 to 20 knots after midnight. waves subsiding to calm to 2 feet,
then building to 1 to 3 feet. 
.thursday...west winds 15 to 25 knots. waves building to 2 to
4 feet. 
.thursday night...northwest winds 10 to 20 knots. waves subsiding
to 1 to 3 feet. 
.friday...west winds 5 to 15 knots backing south. waves subsiding
to calm to 2 feet. 
.saturday...south winds 10 to 20 knots becoming west 15 to
25 knots. a chance of showers. waves building to 3 to 5 feet
occasionally to 7 feet. 

$$

fzus63 kmqt 290801
glfls 
expires:202609292000;;235421

open lake forecast for lake superior
national weather service marquette mi
401 am edt tue sep 29 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...

ridging has weakened to 29.9 inches over lake superior this morning 
as 30.0 high pressure shifts east of the lake and extends from 
southern quebec to lower michigan. deep troughing of 29.3 inches is 
lifting out of the canadian rockies, with a 29.7 inch trough 
extending south through the plains. pressure will fall to 29.7 
inches over lake superior tonight and continue to deepen to 29.6 
inches on wednesday as the canadian trough strengthens into a 29.0 
inch low over hudson bay wednesday afternoon. 29.8 inch troughing 
lingers over the lake on thursday between this low and another 29.6 
low over the south plains. high pressure then builds to 30.3 inches 
over the northern plains thursday night into friday and shifts east 
to the great lakes friday night and saturday.




lsz264-292000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
401 am edt tue sep 29 2026

.early this morning...south winds 5 to 15 knots. areas of dense
fog. waves calm to 2 feet. 
.today...south winds 10 to 20 knots. a chance of showers by mid
afternoon. waves building to 2 to 4 feet. 
.tonight...south winds 10 to 20 knots veering southwest after
midnight. a chance of showers. waves subsiding to 1 to 3 feet. 
.wednesday...southwest winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon, then diminishing to 5 to 15 knots
late. waves 1 to 3 feet. 
.wednesday night...southwest winds 5 to 15 knots becoming west
10 to 20 knots after midnight. waves subsiding to calm to 2 feet,
then building to 1 to 3 feet. 
.thursday...northwest winds 15 to 25 knots becoming west 20 to
30 knots by mid afternoon. waves building to 2 to 4 feet. 
.thursday night...northwest winds 10 to 20 knots. waves subsiding
to 1 to 3 feet. 
.friday...northwest winds 10 to 20 knots becoming west 5 to
15 knots. waves subsiding to calm to 2 feet. 
.saturday...south winds 5 to 15 knots increasing to 15 to
25 knots. a chance of showers. waves building to 3 to 5 feet
occasionally to 7 feet. 

$$

fzus63 kmqt 290801
glfls 
expires:202609292000;;235422

open lake forecast for lake superior
national weather service marquette mi
401 am edt tue sep 29 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...

ridging has weakened to 29.9 inches over lake superior this morning 
as 30.0 high pressure shifts east of the lake and extends from 
southern quebec to lower michigan. deep troughing of 29.3 inches is 
lifting out of the canadian rockies, with a 29.7 inch trough 
extending south through the plains. pressure will fall to 29.7 
inches over lake superior tonight and continue to deepen to 29.6 
inches on wednesday as the canadian trough strengthens into a 29.0 
inch low over hudson bay wednesday afternoon. 29.8 inch troughing 
lingers over the lake on thursday between this low and another 29.6 
low over the south plains. high pressure then builds to 30.3 inches 
over the northern plains thursday night into friday and shifts east 
to the great lakes friday night and saturday.




lsz265-292000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
401 am edt tue sep 29 2026

...dense fog advisory in effect until 5 am edt early this
morning...

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

$$

fzus63 kmqt 290801
glfls 
expires:202609292000;;235423

open lake forecast for lake superior
national weather service marquette mi
401 am edt tue sep 29 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...

ridging has weakened to 29.9 inches over lake superior this morning 
as 30.0 high pressure shifts east of the lake and extends from 
southern quebec to lower michigan. deep troughing of 29.3 inches is 
lifting out of the canadian rockies, with a 29.7 inch trough 
extending south through the plains. pressure will fall to 29.7 
inches over lake superior tonight and continue to deepen to 29.6 
inches on wednesday as the canadian trough strengthens into a 29.0 
inch low over hudson bay wednesday afternoon. 29.8 inch troughing 
lingers over the lake on thursday between this low and another 29.6 
low over the south plains. high pressure then builds to 30.3 inches 
over the northern plains thursday night into friday and shifts east 
to the great lakes friday night and saturday.




lsz266-292000-
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 am edt tue sep 29 2026

...dense fog advisory in effect until 8 am edt this morning...

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

$$

fzus63 kmqt 290801
glfls 
expires:202609292000;;235424

open lake forecast for lake superior
national weather service marquette mi
401 am edt tue sep 29 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...

ridging has weakened to 29.9 inches over lake superior this morning 
as 30.0 high pressure shifts east of the lake and extends from 
southern quebec to lower michigan. deep troughing of 29.3 inches is 
lifting out of the canadian rockies, with a 29.7 inch trough 
extending south through the plains. pressure will fall to 29.7 
inches over lake superior tonight and continue to deepen to 29.6 
inches on wednesday as the canadian trough strengthens into a 29.0 
inch low over hudson bay wednesday afternoon. 29.8 inch troughing 
lingers over the lake on thursday between this low and another 29.6 
low over the south plains. high pressure then builds to 30.3 inches 
over the northern plains thursday night into friday and shifts east 
to the great lakes friday night and saturday.




lsz267-292000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
401 am edt tue sep 29 2026

...dense fog advisory in effect until 8 am edt this morning...

.early this morning...south winds less than 10 knots. areas of
dense fog. waves calm to 2 feet. 
.today...south winds 5 to 15 knots becoming southeast 10 to
20 knots in the afternoon, then becoming south 15 to 25 knots
late. areas of dense fog through early afternoon. waves building
to 1 to 3 feet. 
.tonight...south winds 15 to 25 knots. a chance of showers. waves
building to 2 to 4 feet. 
.wednesday...south winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon. a slight chance of showers. waves
subsiding to calm to 2 feet. 
.wednesday night...south winds 10 to 20 knots veering southwest
after midnight. a slight chance of showers through midnight.
waves calm to 2 feet. 
.thursday...west winds 15 to 25 knots becoming northwest 20 to
30 knots by mid afternoon. waves building to 3 to 6 feet
occasionally to 8 feet. 
.thursday night...northwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. waves subsiding to 2 to 4 feet. 
.friday...northwest winds 15 to 25 knots diminishing to 5 to
15 knots. waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to calm to 2 feet. 
.saturday...southeast winds 5 to 15 knots becoming south 15 to
25 knots. a chance of showers. waves building to 2 to 4 feet. 

$$