fzus63 kdtx 021932
glflh 
expires:202510030345;;998360

open lake forecast for lake huron
national weather service detroit/pontiac mi
332 pm edt thu oct 2 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...a warm and dry airmass will prevail, accompanied by
prolonged south- southwest winds, mostly under 20 knots, through
the weekend.


lhz361-362-030345-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
lake huron from presque isle light to sturgeon point mi beyond
5nm off shore-
332 pm edt thu oct 2 2025

.tonight...southeast winds around 15 knots becoming south 5 to 10
knots after midnight. waves 2 to 4 feet. 
.friday...south winds 5 to 10 knots backing to the southeast late
in the afternoon. waves 1 to 3 feet. 
.friday night...southeast winds 5 to 10 knots early in the
evening becoming light and variable. waves 2 feet or less. 
.saturday...southeast winds 5 to 10 knots veering to the south in
the late morning and early afternoon...then increasing to 10 to
15 knots early in the afternoon. waves 1 to 3 feet. 
.saturday night...south winds 10 to 15 knots. waves 2 to 4 feet. 
.sunday...south winds 10 to 15 knots increasing to 15 to 20 knots
late in the afternoon. waves 3 to 5 feet building to 5 to 7 feet
late in the afternoon. waves occasionally around 10 feet. 
.monday...southwest winds 15 to 20 knots decreasing to 10 to
15 knots in the late morning and early afternoon...then becoming
northwest 5 to 10 knots until early morning. a chance of showers.
waves 3 to 5 feet subsiding to 1 to 3 feet in the late evening
and early morning. 
.tuesday...northwest winds 5 to 10 knots becoming west 10 to
15 knots early in the evening...then becoming northwest 15 to
20 knots in the late evening and early morning. a chance of
showers early in the morning...then showers likely in the late
morning and early afternoon. a chance of showers until early
morning. waves 2 feet or less building to 4 to 6 feet. waves
occasionally around 8 feet. 


$$

fzus63 kdtx 021932
glflh 
expires:202510030345;;998361

open lake forecast for lake huron
national weather service detroit/pontiac mi
332 pm edt thu oct 2 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...a warm and dry airmass will prevail, accompanied by
prolonged south- southwest winds, mostly under 20 knots, through
the weekend.


lhz363-030345-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
332 pm edt thu oct 2 2025

.tonight...southeast winds 10 to 15 knots becoming south after 
midnight. waves 1 to 3 feet. 
.friday...southwest winds 10 to 15 knots becoming south 5 to
10 knots in the afternoon. waves 1 to 3 feet. 
.friday night...south winds 5 to 10 knots. waves 2 feet or less. 
.saturday...south winds 5 to 10 knots increasing to 10 to
15 knots early in the afternoon. waves 2 feet or less. 
.saturday night...south winds 10 to 15 knots. waves 1 to 3 feet
building to 2 to 4 feet after midnight. 
.sunday...south winds 10 to 15 knots increasing to 15 to 20 knots
late in the afternoon. waves 2 to 4 feet building to 4 to 6 feet
late in the afternoon. waves occasionally around 8 feet. 
.monday...southwest winds 15 to 20 knots decreasing to 10 to
15 knots in the late morning and early afternoon...then veering
to the west early in the evening becoming west 10 to 15 knots in
the late evening and early morning. a chance of showers. waves
3 to 5 feet subsiding to 1 to 3 feet in the late evening and
early morning. 
.tuesday...north winds 5 to 10 knots increasing to 10 to 15 knots
in the late morning and early afternoon...then backing to the
west early in the evening becoming northwest 15 to 20 knots in
the late evening and early morning. showers likely...then a
chance of showers in the late evening and early morning. waves
1 to 3 feet building to 5 to 7 feet in the late evening and early
morning. waves occasionally around 10 feet. 


$$

fzus63 kdtx 021932
glflh 
expires:202510030345;;998362

open lake forecast for lake huron
national weather service detroit/pontiac mi
332 pm edt thu oct 2 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...a warm and dry airmass will prevail, accompanied by
prolonged south- southwest winds, mostly under 20 knots, through
the weekend.


lhz462>464-030345-
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-
332 pm edt thu oct 2 2025

.tonight...east winds 5 to 10 knots becoming south 10 to 15 knots
in the late evening and early morning...then decreasing to 5 to
10 knots early in the morning. waves 1 to 3 feet. 
.friday...south winds 5 to 10 knots. waves 2 feet or less. 
.friday night...south winds 5 to 10 knots. waves 2 feet or less. 
.saturday...south winds 5 to 10 knots. waves 2 feet or less. 
.saturday night...south winds 10 to 15 knots. waves 1 to 3 feet. 
.sunday...south winds 10 to 15 knots increasing to 15 to 20 knots
late in the afternoon. waves 1 to 3 feet building to 3 to 5 feet.
.monday...south winds 10 to 15 knots. a chance of showers until
early morning. waves 2 to 4 feet subsiding to 1 to 3 feet until
early morning. 
.tuesday...north winds 5 to 10 knots becoming southwest 10 to
15 knots until early evening...then becoming west 15 to 20 knots
in the late evening and early morning. showers likely. a chance
of showers in the late evening and early morning. waves 1 to
3 feet building to 5 to 7 feet in the late evening and early
morning. waves occasionally around 10 feet. 


$$

fzus63 kmkx 021854
glflm 
expires:202510030315;;996648

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
154 pm cdt thu oct 2 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...

broad high pressure of 30.6 inches will linger over the east coast 
of the united states into this weekend, generally moving southward 
with time. winds will continue from a southerly to southwesterly 
direction, with light to moderate speeds through friday. winds 
are expected to pick up saturday afternoon as a stronger pressure 
gradient moves over the lake between the high pressure and 
approaching low pressure of 29.5 inches over the northern plains. 

gusty south to southwest winds will then continue through sunday, 
with some potential for gales sunday afternoon over the northern 
half of lake michigan. winds should then ease early monday morning
following the passage of a frontal boundary.


lmz080-669-671-673-675-777-779-870-872-874-876-878-030315-
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-
154 pm cdt thu oct 2 2025

sheboygan wi to pentwater mi south...

.tonight...southeast winds 10 to 20 kt becoming south 10 to
15 kt. waves 1 to 3 ft subsiding to 1 to 2 ft. 
.friday...southwest winds 10 to 15 kt becoming south 10 to 20 kt.
waves 1 to 2 ft. 
.friday night...south winds 10 to 15 kt. waves 2 to 4 ft. 
.saturday...south winds 10 to 20 kt increasing to 15 to 25 kt.
waves 2 to 4 ft building to 4 to 6 ft occasionally to 8 ft. 
.saturday night...south winds 15 to 25 kt diminishing to 10 to
20 kt. waves 4 to 6 ft occasionally to 8 ft. 
.sunday...south winds 15 to 25 kt increasing to gales to 35 kt in
the afternoon. waves 4 to 7 ft occasionally to 9 ft building to
7 to 10 ft occasionally to 13 ft. 
.sunday night...south winds to 30 kt becoming southwest. waves
7 to 10 ft occasionally to 13 ft. 
.monday...west winds 15 to 25 kt veering to north 10 to 20 kt.
chance of showers. waves 5 to 8 ft occasionally to 10 ft
subsiding to 4 to 6 ft occasionally to 8 ft. 
.tuesday...north winds 10 to 15 kt becoming northwest 10 to
20 kt. chance of showers. waves 2 to 4 ft.  

$$

fzus63 kmkx 021854
glflm 
expires:202510030315;;996647

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
154 pm cdt thu oct 2 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...

broad high pressure of 30.6 inches will linger over the east coast 
of the united states into this weekend, generally moving southward 
with time. winds will continue from a southerly to southwesterly 
direction, with light to moderate speeds through friday. winds 
are expected to pick up saturday afternoon as a stronger pressure 
gradient moves over the lake between the high pressure and 
approaching low pressure of 29.5 inches over the northern plains. 

gusty south to southwest winds will then continue through sunday, 
with some potential for gales sunday afternoon over the northern 
half of lake michigan. winds should then ease early monday morning
following the passage of a frontal boundary.


lmz261-362-364-366-563-565-567-868-030315-
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-
154 pm cdt thu oct 2 2025

sheboygan wi to pentwater mi north...

.tonight...south winds 10 to 20 kt becoming southwest. waves 2 to
4 ft. 
.friday...southwest winds 10 to 20 kt becoming south. chance of
showers in the afternoon. waves 1 to 3 ft. 
.friday night...south winds 10 to 15 kt. waves 1 to 3 ft. 
.saturday...south winds 10 to 20 kt increasing to 15 to 25 kt.
waves 2 to 4 ft building to 4 to 6 ft occasionally to 8 ft. 
.saturday night...south winds to 30 kt. waves 4 to 6 ft
occasionally to 8 ft. 
.sunday...south winds to 30 kt increasing to gales to 35 kt.
waves 4 to 7 ft occasionally to 9 ft building to 7 to 10 ft
occasionally to 13 ft. 
.sunday night...south gales to 40 kt becoming southwest. waves
8 to 12 ft occasionally to 16 ft. 
.monday...northwest 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 3 to 5 ft. 
.tuesday...northwest winds 10 to 20 kt becoming west. chance of
showers. waves 1 to 2 ft.  

$$

fzus63 kmqt 022001
glfls 
expires:202510030800;;999476

open lake forecast for lake superior
national weather service marquette mi
401 pm edt thu oct 2 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 centered over new england extends 30.2 inch 
ridging over the lake the rest of this afternoon before weakening to 
30.1 inches by this evening as the high settles further south. 
troughing over the plains then deepens to 29.6 inches on friday, 
becoming centered over the dakotas friday night. this lifts towards 
lake winnipeg on saturday while a 29.4 inch low develops off of the 
colorado rockies. this second low then lifts northeast on sunday to 
northwestern ontario, quickly reaching far northern quebec by monday 
morning as it deepens to at least 29.2 inches. this results in at 
least 29.8 inch troughing over lake superior by saturday, which 
holds until monday morning. in it's wake, a 30.3 inch high pressure 
moving across the northern plains brings ridging of 30.2 inches back 
over lake superior by monday evening. a reinforcing 30.4 inch high 
pressure dropping down from the canadian prairies into the northern 
plains on tuesday brings 30.3 inch ridging to lake superior by 
tuesday evening.



lsz266-030800-
lake superior east of a line from manitou island to marquette mi
and west of a line from grand marais mi to the us/canadian border
beyond 5nm from shore-
401 pm edt thu oct 2 2025

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

$$

fzus63 kmqt 022001
glfls 
expires:202510030800;;999477

open lake forecast for lake superior
national weather service marquette mi
401 pm edt thu oct 2 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 centered over new england extends 30.2 inch 
ridging over the lake the rest of this afternoon before weakening to 
30.1 inches by this evening as the high settles further south. 
troughing over the plains then deepens to 29.6 inches on friday, 
becoming centered over the dakotas friday night. this lifts towards 
lake winnipeg on saturday while a 29.4 inch low develops off of the 
colorado rockies. this second low then lifts northeast on sunday to 
northwestern ontario, quickly reaching far northern quebec by monday 
morning as it deepens to at least 29.2 inches. this results in at 
least 29.8 inch troughing over lake superior by saturday, which 
holds until monday morning. in it's wake, a 30.3 inch high pressure 
moving across the northern plains brings ridging of 30.2 inches back 
over lake superior by monday evening. a reinforcing 30.4 inch high 
pressure dropping down from the canadian prairies into the northern 
plains on tuesday brings 30.3 inch ridging to lake superior by 
tuesday evening.



lsz267-030800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
401 pm edt thu oct 2 2025

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

$$

fzus63 kmqt 022001
glfls 
expires:202510030800;;999472

open lake forecast for lake superior
national weather service marquette mi
401 pm edt thu oct 2 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 centered over new england extends 30.2 inch 
ridging over the lake the rest of this afternoon before weakening to 
30.1 inches by this evening as the high settles further south. 
troughing over the plains then deepens to 29.6 inches on friday, 
becoming centered over the dakotas friday night. this lifts towards 
lake winnipeg on saturday while a 29.4 inch low develops off of the 
colorado rockies. this second low then lifts northeast on sunday to 
northwestern ontario, quickly reaching far northern quebec by monday 
morning as it deepens to at least 29.2 inches. this results in at 
least 29.8 inch troughing over lake superior by saturday, which 
holds until monday morning. in it's wake, a 30.3 inch high pressure 
moving across the northern plains brings ridging of 30.2 inches back 
over lake superior by monday evening. a reinforcing 30.4 inch high 
pressure dropping down from the canadian prairies into the northern 
plains on tuesday brings 30.3 inch ridging to lake superior by 
tuesday evening.



lsz162-030800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt thu oct 2 2025 /301 pm cdt thu oct 2 2025/

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

$$

fzus63 kmqt 022001
glfls 
expires:202510030800;;999473

open lake forecast for lake superior
national weather service marquette mi
401 pm edt thu oct 2 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 centered over new england extends 30.2 inch 
ridging over the lake the rest of this afternoon before weakening to 
30.1 inches by this evening as the high settles further south. 
troughing over the plains then deepens to 29.6 inches on friday, 
becoming centered over the dakotas friday night. this lifts towards 
lake winnipeg on saturday while a 29.4 inch low develops off of the 
colorado rockies. this second low then lifts northeast on sunday to 
northwestern ontario, quickly reaching far northern quebec by monday 
morning as it deepens to at least 29.2 inches. this results in at 
least 29.8 inch troughing over lake superior by saturday, which 
holds until monday morning. in it's wake, a 30.3 inch high pressure 
moving across the northern plains brings ridging of 30.2 inches back 
over lake superior by monday evening. a reinforcing 30.4 inch high 
pressure dropping down from the canadian prairies into the northern 
plains on tuesday brings 30.3 inch ridging to lake superior by 
tuesday evening.



lsz263-030800-
lake superior from saxon harbor wi to upper entrance to portage
canal mi 5nm off shore to the us/canadian border including isle
royale national park-
401 pm edt thu oct 2 2025

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

$$

fzus63 kmqt 022001
glfls 
expires:202510030800;;999474

open lake forecast for lake superior
national weather service marquette mi
401 pm edt thu oct 2 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 centered over new england extends 30.2 inch 
ridging over the lake the rest of this afternoon before weakening to 
30.1 inches by this evening as the high settles further south. 
troughing over the plains then deepens to 29.6 inches on friday, 
becoming centered over the dakotas friday night. this lifts towards 
lake winnipeg on saturday while a 29.4 inch low develops off of the 
colorado rockies. this second low then lifts northeast on sunday to 
northwestern ontario, quickly reaching far northern quebec by monday 
morning as it deepens to at least 29.2 inches. this results in at 
least 29.8 inch troughing over lake superior by saturday, which 
holds until monday morning. in it's wake, a 30.3 inch high pressure 
moving across the northern plains brings ridging of 30.2 inches back 
over lake superior by monday evening. a reinforcing 30.4 inch high 
pressure dropping down from the canadian prairies into the northern 
plains on tuesday brings 30.3 inch ridging to lake superior by 
tuesday evening.



lsz264-030800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
401 pm edt thu oct 2 2025

.late this afternoon...south winds 5 to 15 knots. waves 2 to
4 feet subsiding to 1 to 3 feet. 
.tonight...south winds 5 to 15 knots veering southwest after
midnight. a chance of showers and thunderstorms. waves subsiding
to calm to 2 feet. 
.friday...west winds 5 to 15 knots veering north in the
afternoon, then veering east late. waves calm to 2 feet. 
.friday night...east winds 5 to 15 knots veering southeast after
midnight, then increasing to 10 to 20 knots late. waves building
to 1 to 3 feet. 
.saturday...south winds 15 to 25 knots. waves building to 3 to
5 feet occasionally to 7 feet. 
.saturday night...south winds 15 to 25 knots increasing to 20 to
30 knots after midnight. waves 3 to 5 feet occasionally to
7 feet. 
.sunday...south winds 20 to 30 knots increasing to gales to
35 knots by mid afternoon. waves building to 4 to 7 feet
occasionally to 9 feet. 
.sunday night...southwest gales to 35 knots becoming west 20 to
30 knots after midnight. waves building to 5 to 9 feet
occasionally to 11 feet. 
.monday...west winds 10 to 20 knots backing southwest. waves
subsiding to calm to 2 feet, then building to 1 to 3 feet. 
.tuesday...west winds 15 to 25 knots veering northwest. waves
building to 3 to 5 feet occasionally to 7 feet, then subsiding to
2 to 4 feet. 

$$

fzus63 kmqt 022001
glfls 
expires:202510030800;;999475

open lake forecast for lake superior
national weather service marquette mi
401 pm edt thu oct 2 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 centered over new england extends 30.2 inch 
ridging over the lake the rest of this afternoon before weakening to 
30.1 inches by this evening as the high settles further south. 
troughing over the plains then deepens to 29.6 inches on friday, 
becoming centered over the dakotas friday night. this lifts towards 
lake winnipeg on saturday while a 29.4 inch low develops off of the 
colorado rockies. this second low then lifts northeast on sunday to 
northwestern ontario, quickly reaching far northern quebec by monday 
morning as it deepens to at least 29.2 inches. this results in at 
least 29.8 inch troughing over lake superior by saturday, which 
holds until monday morning. in it's wake, a 30.3 inch high pressure 
moving across the northern plains brings ridging of 30.2 inches back 
over lake superior by monday evening. a reinforcing 30.4 inch high 
pressure dropping down from the canadian prairies into the northern 
plains on tuesday brings 30.3 inch ridging to lake superior by 
tuesday evening.



lsz265-030800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
401 pm edt thu oct 2 2025

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

$$