fzus63 kdtx 091939
glflh 
expires:202510100345;;393316

open lake forecast for lake huron
national weather service detroit/pontiac mi
339 pm edt thu oct 9 2025

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, 30.60 inches, centered over southern
ontario will continue to influence the region through late this
evening. weakening low pressure, averaging 29.90 inches, then
drops through the central great lakes late friday into saturday.


lhz361-100345-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
339 pm edt thu oct 9 2025

.tonight...southeast winds 5 to 10 knots becoming south 10 to
15 knots in the late evening and overnight. waves 1 to 3 feet
building to 2 to 4 feet after midnight. 
.friday...south winds 10 to 15 knots increasing to 15 to 20 knots
late in the morning...then decreasing to 10 to 15 knots in the
afternoon. a chance of showers. waves 3 to 5 feet. 
.friday night...southwest winds 10 to 15 knots veering to the
west after midnight. a chance of waterspouts in the evening. a
chance of showers. waves 3 to 5 feet subsiding to 2 to 4 feet
after midnight. 
.saturday...northeast winds 10 to 15 knots. a chance of showers
in the afternoon. waves 1 to 3 feet building to 2 to 4 feet in
the late morning and afternoon. 
.saturday night...east winds 5 to 10 knots increasing to 10 to
15 knots after midnight. waves 2 to 4 feet subsiding to 1 to
3 feet in the late evening and overnight. 
.sunday...east winds 10 to 15 knots. waves 2 to 4 feet. 
.monday...southeast winds 10 to 15 knots decreasing to 5 to
10 knots until early morning. a chance of showers until early
morning. waves 2 to 4 feet subsiding to 1 to 3 feet in the late
evening and early morning. 
.tuesday...southwest winds 5 to 10 knots becoming northwest 10 to
15 knots. waves 1 to 3 feet building to 2 to 4 feet until early
morning. 


$$

fzus63 kdtx 091939
glflh 
expires:202510100345;;393317

open lake forecast for lake huron
national weather service detroit/pontiac mi
339 pm edt thu oct 9 2025

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, 30.60 inches, centered over southern
ontario will continue to influence the region through late this
evening. weakening low pressure, averaging 29.90 inches, then
drops through the central great lakes late friday into saturday.


lhz362-363-100345-
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-
339 pm edt thu oct 9 2025

.tonight...south winds 5 to 10 knots increasing to 15 to
20 knots. waves 1 to 3 feet building to 2 to 4 feet after
midnight. 
.friday...south winds 15 to 20 knots. a chance of. waves 4 to
6 feet. waves occasionally around 8 feet. 
.friday night...south winds 15 to 20 knots decreasing to 10 to
15 knots in the late evening and overnight. a chance of showers.
a chance of waterspouts after midnight. waves 4 to 6 feet. 
.saturday...north winds 10 to 15 knots veering to the northeast
in the late morning and afternoon. a chance of waterspouts in the
morning. a chance of showers. waves 2 to 4 feet. waves
occasionally around 8 feet. 
.saturday night...east winds 10 to 15 knots. a chance of showers
in the evening. waves 2 to 4 feet. 
.sunday...east winds 10 to 15 knots. waves 2 to 4 feet. 
.monday...southeast winds 10 to 15 knots becoming east 5 to
10 knots until early morning. waves 2 to 4 feet subsiding to 1 to
3 feet until early morning. 
.tuesday...southwest winds 5 to 10 knots becoming west 10 to
15 knots in the late morning and early afternoon...then becoming
northwest 15 to 20 knots until early morning. waves 1 to 3 feet
building to 3 to 5 feet until early morning. 


$$

fzus63 kdtx 091939
glflh 
expires:202510100345;;393318

open lake forecast for lake huron
national weather service detroit/pontiac mi
339 pm edt thu oct 9 2025

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, 30.60 inches, centered over southern
ontario will continue to influence the region through late this
evening. weakening low pressure, averaging 29.90 inches, then
drops through the central great lakes late friday into saturday.


lhz462>464-100345-
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-
339 pm edt thu oct 9 2025

.tonight...east winds 5 to 10 knots veering to the southeast late
in the evening...then increasing to 10 to 15 knots after
midnight. waves 1 to 3 feet building to 2 to 4 feet early in the
morning. 
.friday...south winds 10 to 15 knots increasing to 15 to 20 knots
late in the afternoon. a chance of. waves 2 to 4 feet. 
.friday night...south winds 15 to 20 knots becoming southwest
10 to 15 knots in the late evening and overnight. a chance of
showers. waves 3 to 5 feet. 
.saturday...south winds 10 to 15 knots backing to the east in the
late morning and afternoon. a chance of showers. a chance of
waterspouts in the afternoon. waves 2 to 4 feet subsiding to 1 to
3 feet early in the afternoon. 
.saturday night...east winds 10 to 15 knots. a chance of showers.
waves 1 to 3 feet. 
.sunday...east winds 10 to 15 knots. waves 2 to 4 feet. 
.monday...east winds 10 to 15 knots decreasing to 5 to 10 knots.
waves 1 to 3 feet. 
.tuesday...south winds 5 to 10 knots veering to the west in the
late morning and early afternoon...then becoming north 10 to
15 knots until early morning. waves 2 feet or less building to
3 to 5 feet until early morning. 


$$

fzus63 kmkx 091949
glflm 
expires:202510100315;;393597

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
249 pm cdt thu oct 9 2025

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...

high pressure around 30.5 inches will continue to migrate 
eastward across the northeast us tonight. south to southeasterly 
winds into tonight but as a low pressure system around 29.8 inches 
develops over the northwestern great lakes tonight pushing 
southeast the pressure gradient will increase as lower pressure 
impinges on the high pressure to the east. breezy southwesterly 
winds are expected later tonight through friday lingering into 
friday night. there will be some gale gusts possible friday 
morning, especially across the northern open waters, but overall 
gales are not expected to be widespread or numerous. we will then 
see north to northeast winds move in behind the front beginning 
friday afternoon, continuing saturday through sunday as the low 
pressure moves into southern michigan. winds then begin to veer 
back to the south for the start of next week with another low 
pressure system developing and working its way across plains and 
upper midwest.


lmz261-362-364-366-563-565-567-868-100315-
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 thu oct 9 2025

sheboygan wi to pentwater mi north...

.tonight...south winds 10 to 20 kt increasing to 30 kt. waves
3 to 5 ft building to 4 to 7 ft occasionally to 9 ft.
.friday...southwest winds to 30 kt becoming west. scattered
showers. waves 7 to 10 ft occasionally to 13 ft building to 8 to
11 ft occasionally to 14 ft. 
.friday night...northwest winds to 30 kt diminishing to 15 to
25 kt after midnight, then becoming north 10 to 20 kt late.
chance of showers in the evening. waves 6 to 9 ft occasionally to
12 ft subsiding to 4 to 6 ft occasionally to 8 ft. 
.saturday...northeast winds 10 to 20 kt. waves 3 to 5 ft. 
.saturday night...east winds 10 to 20 kt becoming southeast 10 to
15 kt. waves 2 to 4 ft. 
.sunday...southeast winds 10 to 20 kt increasing to 15 to 25 kt.
waves 2 to 4 ft. 
.sunday night...southeast winds 15 to 25 kt. waves 4 to 6 ft
occasionally to 8 ft building to 5 to 8 ft occasionally to 10 ft.
.monday...south winds 15 to 25 kt diminishing to 10 to 20 kt.
chance of showers. waves 5 to 8 ft occasionally to 10 ft
subsiding to 4 to 7 ft occasionally to 9 ft. 
.tuesday...north winds 10 to 20 kt becoming northwest. waves 2 to
4 ft.  

$$

fzus63 kmkx 091949
glflm 
expires:202510100315;;393598

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
249 pm cdt thu oct 9 2025

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...

high pressure around 30.5 inches will continue to migrate 
eastward across the northeast us tonight. south to southeasterly 
winds into tonight but as a low pressure system around 29.8 inches 
develops over the northwestern great lakes tonight pushing 
southeast the pressure gradient will increase as lower pressure 
impinges on the high pressure to the east. breezy southwesterly 
winds are expected later tonight through friday lingering into 
friday night. there will be some gale gusts possible friday 
morning, especially across the northern open waters, but overall 
gales are not expected to be widespread or numerous. we will then 
see north to northeast winds move in behind the front beginning 
friday afternoon, continuing saturday through sunday as the low 
pressure moves into southern michigan. winds then begin to veer 
back to the south for the start of next week with another low 
pressure system developing and working its way across plains and 
upper midwest.


lmz080-669-671-673-675-777-779-870-872-874-876-878-100315-
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 thu oct 9 2025

sheboygan wi to pentwater mi south...

.tonight...southeast winds 10 to 20 kt becoming south 15 to
25 kt. waves 3 to 5 ft building to 4 to 7 ft occasionally to
9 ft. 
.friday...south winds to 30 kt becoming southwest. isolated
showers. waves 8 to 11 ft occasionally to 14 ft. 
.friday night...west winds to 30 kt becoming northwest 15 to
25 kt. chance of showers in the evening. waves 7 to 10 ft
occasionally to 13 ft subsiding to 4 to 7 ft occasionally to
9 ft. 
.saturday...north winds 10 to 20 kt. waves 4 to 6 ft occasionally
to 8 ft subsiding to 3 to 5 ft. 
.saturday night...northeast winds 10 to 15 kt becoming east.
waves 2 to 4 ft. 
.sunday...east winds 10 to 20 kt becoming southeast. waves 2 to
4 ft. 
.sunday night...southeast winds 10 to 20 kt increasing to 15 to
25 kt. waves 4 to 6 ft occasionally to 8 ft building to 5 to 8 ft
occasionally to 10 ft. 
.monday...southeast winds 15 to 25 kt becoming south 10 to 20 kt.
waves 5 to 8 ft occasionally to 10 ft subsiding to 4 to 7 ft
occasionally to 9 ft. 
.tuesday...north winds 10 to 20 kt. waves 3 to 5 ft.  

$$

fzus63 kmqt 092008 cca
glfls 
expires:202510100800;;394766

open lake forecast for lake superior...corrected
national weather service marquette mi
408 pm edt thu oct 9 2025

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...

30.5 inch high pressure continues to slide eastward this evening, 
becoming centered over new england later tonight. this allows a 30.0 
inch trough to move into the upper great lakes as a 29.4 inch low 
moves over hudson bay. along this trough, a 29.9 inch low will 
develop near thunder bay, then move over lake superior friday 
afternoon and evening. the low drops into lower michigan friday 
night and saturday while 30.1 inch ridging builds over the lake. 
this ridge gradually weakens through the weekend as the next system 
organizes upstream in the northern plains. by early monday, deep 
29.4 inch low pressure will be moving into manitoba and ontario, 
with a 29.8 to 29.9 inch trough moving over the lake before ridging 
recovers late monday into tuesday.



lsz162-100800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
408 pm edt thu oct 9 2025 /308 pm cdt thu oct 9 2025/

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

$$

fzus63 kmqt 092008 cca
glfls 
expires:202510100800;;394767

open lake forecast for lake superior...corrected
national weather service marquette mi
408 pm edt thu oct 9 2025

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...

30.5 inch high pressure continues to slide eastward this evening, 
becoming centered over new england later tonight. this allows a 30.0 
inch trough to move into the upper great lakes as a 29.4 inch low 
moves over hudson bay. along this trough, a 29.9 inch low will 
develop near thunder bay, then move over lake superior friday 
afternoon and evening. the low drops into lower michigan friday 
night and saturday while 30.1 inch ridging builds over the lake. 
this ridge gradually weakens through the weekend as the next system 
organizes upstream in the northern plains. by early monday, deep 
29.4 inch low pressure will be moving into manitoba and ontario, 
with a 29.8 to 29.9 inch trough moving over the lake before ridging 
recovers late monday into tuesday.



lsz263-100800-
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-
408 pm edt thu oct 9 2025

...gale warning in effect from friday morning through friday
evening...

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

$$

fzus63 kmqt 092008 cca
glfls 
expires:202510100800;;394768

open lake forecast for lake superior...corrected
national weather service marquette mi
408 pm edt thu oct 9 2025

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...

30.5 inch high pressure continues to slide eastward this evening, 
becoming centered over new england later tonight. this allows a 30.0 
inch trough to move into the upper great lakes as a 29.4 inch low 
moves over hudson bay. along this trough, a 29.9 inch low will 
develop near thunder bay, then move over lake superior friday 
afternoon and evening. the low drops into lower michigan friday 
night and saturday while 30.1 inch ridging builds over the lake. 
this ridge gradually weakens through the weekend as the next system 
organizes upstream in the northern plains. by early monday, deep 
29.4 inch low pressure will be moving into manitoba and ontario, 
with a 29.8 to 29.9 inch trough moving over the lake before ridging 
recovers late monday into tuesday.



lsz264-100800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
408 pm edt thu oct 9 2025

...gale warning in effect from friday morning through friday
evening...

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

$$

fzus63 kmqt 092008 cca
glfls 
expires:202510100800;;394769

open lake forecast for lake superior...corrected
national weather service marquette mi
408 pm edt thu oct 9 2025

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...

30.5 inch high pressure continues to slide eastward this evening, 
becoming centered over new england later tonight. this allows a 30.0 
inch trough to move into the upper great lakes as a 29.4 inch low 
moves over hudson bay. along this trough, a 29.9 inch low will 
develop near thunder bay, then move over lake superior friday 
afternoon and evening. the low drops into lower michigan friday 
night and saturday while 30.1 inch ridging builds over the lake. 
this ridge gradually weakens through the weekend as the next system 
organizes upstream in the northern plains. by early monday, deep 
29.4 inch low pressure will be moving into manitoba and ontario, 
with a 29.8 to 29.9 inch trough moving over the lake before ridging 
recovers late monday into tuesday.



lsz265-100800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
408 pm edt thu oct 9 2025

...gale warning in effect from friday morning through friday
evening...

.late this afternoon...south winds 15 to 25 knots. waves 1 to
3 feet. 
.tonight...south winds 20 to 30 knots becoming southwest gales to
35 knots late. showers after midnight. waves building to 3 to
5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. 
.friday...southwest gales to 35 knots becoming northwest gales to
40 knots late. a slight chance of thunderstorms through early
afternoon. showers. waves building to 3 to 5 feet occasionally to
7 feet, then subsiding to 2 to 4 feet. 
.friday night...north gales to 40 knots diminishing to 20 to
30 knots late. a chance of showers through midnight. waves
subsiding to 3 to 6 feet occasionally to 8 feet, then building to
4 to 7 feet occasionally to 9 feet. 
.saturday...northeast winds 10 to 20 knots veering east by mid
afternoon. waves subsiding to calm to 2 feet. 
.saturday night...southeast winds 10 to 20 knots. waves calm to
2 feet. 
.sunday...southeast winds 15 to 25 knots increasing to 20 to
30 knots by mid afternoon. waves building to 2 to 4 feet. 
.sunday night...southeast gales to 35 knots veering south after
midnight. a chance of showers. waves building to 3 to 6 feet
occasionally to 8 feet. 
.monday...south gales to 35 knots becoming west 20 to 30 knots.
showers likely. waves subsiding to calm to 2 feet, then building
to 1 to 3 feet. 
.tuesday...northwest winds 20 to 30 knots becoming north 10 to
20 knots. waves subsiding to calm to 2 feet. 

$$

fzus63 kmqt 092008 cca
glfls 
expires:202510100800;;394770

open lake forecast for lake superior...corrected
national weather service marquette mi
408 pm edt thu oct 9 2025

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...

30.5 inch high pressure continues to slide eastward this evening, 
becoming centered over new england later tonight. this allows a 30.0 
inch trough to move into the upper great lakes as a 29.4 inch low 
moves over hudson bay. along this trough, a 29.9 inch low will 
develop near thunder bay, then move over lake superior friday 
afternoon and evening. the low drops into lower michigan friday 
night and saturday while 30.1 inch ridging builds over the lake. 
this ridge gradually weakens through the weekend as the next system 
organizes upstream in the northern plains. by early monday, deep 
29.4 inch low pressure will be moving into manitoba and ontario, 
with a 29.8 to 29.9 inch trough moving over the lake before ridging 
recovers late monday into tuesday.



lsz266-100800-
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-
408 pm edt thu oct 9 2025

...gale warning in effect from friday morning through friday
evening...

.late this afternoon...south winds 20 to 30 knots. waves 2 to
4 feet. 
.tonight...south winds 20 to 30 knots increasing to gales to
35 knots after midnight. showers after midnight. waves building
to 5 to 8 feet occasionally to 10 feet. 
.friday...southwest gales to 35 knots becoming northwest gales to
40 knots late. showers and a slight chance of thunderstorms.
waves subsiding to 4 to 7 feet occasionally to 9 feet. 
.friday night...north gales to 35 knots diminishing to 20 to
30 knots after midnight. a chance of showers through midnight.
waves building to 5 to 8 feet occasionally to 10 feet, then
subsiding to 3 to 6 feet occasionally to 8 feet. 
.saturday...northeast winds 10 to 20 knots becoming east 5 to
15 knots by mid afternoon. waves subsiding to calm to 2 feet. 
.saturday night...southeast winds 5 to 15 knots increasing to
10 to 20 knots after midnight. waves building to 2 to 4 feet. 
.sunday...southeast winds 15 to 25 knots increasing to gales to
35 knots by mid afternoon. waves building to 5 to 8 feet
occasionally to 10 feet. 
.sunday night...southeast gales to 35 knots veering south after
midnight. a chance of showers. waves building to 7 to 10 feet
occasionally to 13 feet. 
.monday...south gales to 35 knots becoming northwest 20 to
30 knots. showers likely. waves subsiding to 4 to 8 feet
occasionally to 10 feet. 
.tuesday...northwest winds 15 to 25 knots veering north. waves
subsiding to 2 to 4 feet. 

$$

fzus63 kmqt 092008 cca
glfls 
expires:202510100800;;394771

open lake forecast for lake superior...corrected
national weather service marquette mi
408 pm edt thu oct 9 2025

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...

30.5 inch high pressure continues to slide eastward this evening, 
becoming centered over new england later tonight. this allows a 30.0 
inch trough to move into the upper great lakes as a 29.4 inch low 
moves over hudson bay. along this trough, a 29.9 inch low will 
develop near thunder bay, then move over lake superior friday 
afternoon and evening. the low drops into lower michigan friday 
night and saturday while 30.1 inch ridging builds over the lake. 
this ridge gradually weakens through the weekend as the next system 
organizes upstream in the northern plains. by early monday, deep 
29.4 inch low pressure will be moving into manitoba and ontario, 
with a 29.8 to 29.9 inch trough moving over the lake before ridging 
recovers late monday into tuesday.



lsz267-100800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
408 pm edt thu oct 9 2025

.late this afternoon...south winds 15 to 25 knots. waves 1 to
3 feet. 
.tonight...south winds 20 to 30 knots. a chance of showers after
midnight. waves building to 3 to 6 feet occasionally to 8 feet. 
.friday...south winds to 30 knots with a few gale force gusts to
35 knots possible veering southwest in the afternoon, then
becoming west 20 to 30 knots late. showers. a slight chance of
thunderstorms by mid afternoon. waves building to 5 to 8 feet
occasionally to 10 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet. 
.friday night...north winds 15 to 25 knots veering northeast
after midnight, then increasing to 20 to 30 knots late. a chance
of showers through midnight. waves subsiding to 3 to 5 feet
occasionally to 7 feet. 
.saturday...northeast winds 10 to 20 knots becoming east 5 to
15 knots by mid afternoon. waves subsiding to calm to 2 feet. 
.saturday night...southeast winds 10 to 20 knots increasing to
15 to 25 knots after midnight. waves building to 1 to 3 feet. 
.sunday...southeast winds 15 to 25 knots increasing to 20 to
30 knots by mid afternoon. waves building to 3 to 5 feet
occasionally to 7 feet. 
.sunday night...southeast winds 20 to 30 knots. waves building to
3 to 6 feet occasionally to 8 feet. 
.monday...south winds 15 to 25 knots veering west. showers
likely, then a chance of showers. waves subsiding to 2 to 4 feet,
then building to 4 to 7 feet occasionally to 9 feet. 
.tuesday...northwest winds 15 to 25 knots veering north. waves
building to 5 to 8 feet occasionally to 10 feet, then subsiding
to 2 to 4 feet. 

$$