fzus63 kdtx 240135
glflh 
expires:202604240945;;883105

open lake forecast for lake huron
national weather service detroit/pontiac mi
935 pm edt thu apr 23 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...a warm front will continue to lift through the region
into friday. low pressure, 29.7 inches, then develops along the 
front and tracks across the southern great lakes friday night. 
this low will bring increased chances for storms friday afternoon 
into early saturday.


lhz361-362-240945-
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-
935 pm edt thu apr 23 2026

.rest of tonight...east winds 15 to 20 knots increasing to 20 to
25 knots with gusts to around 30 knots early in the morning.
waves 6 to 9 feet. waves occasionally around 12 feet. 
.friday...east winds 20 to 25 knots with gusts to around
30 knots. waves 8 to 12 feet. waves occasionally around 15 feet. 
.friday night...east winds 15 to 20 knots decreasing to 10 to
15 knots after midnight. showers in the evening...then showers
likely after midnight. waves 5 to 7 feet. waves occasionally
around 10 feet. 
.saturday...northeast winds 10 to 15 knots. a chance of showers
in the morning. waves 3 to 5 feet. 
.saturday night...north winds 5 to 10 knots. waves 1 to 3 feet. 
.sunday...northeast winds 5 to 10 knots veering to the east late
in the evening. waves 2 feet or less. 
.monday...east winds 5 to 10 knots becoming southeast to 30 knots
with gusts to 40 knot gales. showers likely by midnight. waves
1 to 3 feet building to 12 to 16 feet. waves occasionally around
20 feet. 
.tuesday...southeast winds to 30 knots with gusts to 40 knot
gales decreasing to 20 to 25 knots with gusts to 35 knot gales in
the late morning and early afternoon...then becoming south 15 to
20 knots early in the evening decreasing to 10 to 15 knots by
midnight. showers likely early in the morning...then a chance of
showers until early evening. waves 12 to 16 feet subsiding to
6 to 9 feet . waves occasionally around 20 feet. 


$$

fzus63 kdtx 240135
glflh 
expires:202604240945;;883106

open lake forecast for lake huron
national weather service detroit/pontiac mi
935 pm edt thu apr 23 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...a warm front will continue to lift through the region
into friday. low pressure, 29.7 inches, then develops along the 
front and tracks across the southern great lakes friday night. 
this low will bring increased chances for storms friday afternoon 
into early saturday.


lhz363-240945-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
935 pm edt thu apr 23 2026

.rest of tonight...east winds 10 to 15 knots. waves 2 to 4 feet. 
.friday...east winds 10 to 15 knots. a chance of showers in the
afternoon. waves 3 to 5 feet. 
.friday night...east winds 10 to 15 knots. showers. waves 3 to
5 feet. 
.saturday...northeast winds 10 to 15 knots. a chance of showers.
waves 2 to 4 feet. 
.saturday night...north winds 10 to 15 knots decreasing to 5 to
10 knots in the late evening and overnight. waves 2 to 4 feet
subsiding to 1 to 3 feet in the late evening and overnight. 
.sunday...northeast winds 5 to 10 knots. waves 2 feet or less. 
.monday...east winds 5 to 10 knots becoming southeast to 30 knots
with gusts to 40 knot gales. showers likely by midnight. waves
1 to 3 feet building to 10 to 14 feet. waves occasionally around
18 feet. 
.tuesday...southeast winds to 30 knots with gusts to 40 knot
gales becoming south 20 to 25 knots with gusts to around 30 knots
in the late morning and early afternoon...then decreasing to
15 to 20 knots early in the evening decreasing to 10 to 15 knots
by midnight. showers likely early in the morning...then a chance
of showers until early evening. waves 8 to 12 feet subsiding to
4 to 6 feet by midnight. waves occasionally around 15 feet. 


$$

fzus63 kdtx 240135
glflh 
expires:202604240945;;883107

open lake forecast for lake huron
national weather service detroit/pontiac mi
935 pm edt thu apr 23 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...a warm front will continue to lift through the region
into friday. low pressure, 29.7 inches, then develops along the 
front and tracks across the southern great lakes friday night. 
this low will bring increased chances for storms friday afternoon 
into early saturday.


lhz462>464-240945-
lake huron from port austin to harbor beach beyond 5nm off shore-
lake huron from harbor beach to port sanilac beyond 5nm off shore-
lake huron from port sanilac to port huron beyond 5nm off shore-
935 pm edt thu apr 23 2026

.rest of tonight...east winds 5 to 10 knots. waves 1 to 3 feet. 
.friday...southeast winds 10 to 15 knots. waves 1 to 3 feet
building to 2 to 4 feet in the afternoon. 
.friday night...east winds 10 to 15 knots. a chance of showers in
the evening...then showers after midnight. waves 2 to 4 feet. 
.saturday...northeast winds 10 to 15 knots. a chance of showers.
waves 2 to 4 feet. 
.saturday night...north winds 10 to 15 knots becoming northeast
5 to 10 knots after midnight. waves 2 to 4 feet subsiding to 1 to
3 feet after midnight. 
.sunday...northeast winds 5 to 10 knots. waves 2 feet or less. 
.monday...east winds 5 to 10 knots becoming southeast to 30 knots
with gusts to 40 knot gales. showers likely by midnight. waves
1 to 3 feet building to 10 to 14 feet. waves occasionally around
18 feet. 
.tuesday...southeast winds to 30 knots with gusts to 40 knot
gales becoming south 20 to 25 knots with gusts to 35 knot gales
in the late morning and early afternoon...then decreasing to
15 to 20 knots early in the evening becoming southwest 10 to
15 knots by midnight. showers likely early in the morning...then
a chance of showers until early evening. waves 10 to 14 feet
subsiding to 4 to 6 feet . waves occasionally around 18 feet. 


$$

fzus63 kmkx 240148
glflm 
expires:202604240930;;883448

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
848 pm cdt thu apr 23 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...

areas of fog will continue over the lake into friday due to 
relatively mild and moist air flowing over the cold lake. modest 
south to southeast winds will persist into friday as a trough of 
low pressure and cold front approaches from minnesota and iowa. 
however, breezy easterly winds are expected over the northern tip 
of the lake through friday afternoon, as the warm front will 
stall before reaching the upper peninsula. 

the low will pull a cold front across lake michigan friday afternoon 
and evening, resulting in modest northwest to north winds. 
showers and thunderstorms are expected late tonight through 
friday, both ahead of and along the front. severe weather is not 
anticipated at this time.

light north winds on saturday will then become easterly saturday
night and sunday before increasing into monday. 29.4 inch low 
pressure is forecast to track northeastward from the central great
plains (sunday night) near or over lake michigan (monday night), 
with gusty east to southeast winds ahead of its arrival and gusty 
west winds behind it (into tuesday). not seeing widespread gale 
potential with this system, though trends will be monitored.


lmz261-362-240930-
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-
848 pm cdt thu apr 23 2026

rock island passage to charlevoix mi north...

.rest of tonight...east winds to 30 kt increasing to gales to
35 kt. slight chance of rain showers overnight. waves 2 to 4 ft
building to 4 to 7 ft occasionally to 9 ft. 
.friday...east gales to 35 kt becoming northeast to 30 kt. chance
of rain showers and slight chance of thunderstorms in the
morning, then rain showers likely with slight chance of
thunderstorms in the afternoon. patchy fog in the afternoon.
waves 4 to 7 ft occasionally to 9 ft. 
.friday night...northeast winds 15 to 25 kt becoming north 10 to
15 kt. patchy fog in the evening. chance of rain showers. waves
3 to 5 ft subsiding to 2 to 4 ft. 
.saturday...north winds 10 to 15 kt becoming northeast. waves
1 to 2 ft. 
.saturday night...northeast winds 10 to 15 kt becoming east 5 to
10 kt. waves 1 to 2 ft. 
.sunday...east winds 5 to 10 kt becoming northeast 10 to 15 kt.
waves 1 ft or less. 
.sunday night...east winds 10 to 15 kt. waves 1 to 2 ft. 
.monday...east winds 10 to 20 kt increasing to 30 kt. waves 2 to
4 ft building to 4 to 6 ft occasionally to 8 ft. 
.tuesday...south winds to 30 kt becoming southwest. chance of
rain showers. waves 6 to 9 ft occasionally to 12 ft.  

$$

fzus63 kmkx 240148
glflm 
expires:202604240930;;883449

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
848 pm cdt thu apr 23 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...

areas of fog will continue over the lake into friday due to 
relatively mild and moist air flowing over the cold lake. modest 
south to southeast winds will persist into friday as a trough of 
low pressure and cold front approaches from minnesota and iowa. 
however, breezy easterly winds are expected over the northern tip 
of the lake through friday afternoon, as the warm front will 
stall before reaching the upper peninsula. 

the low will pull a cold front across lake michigan friday afternoon 
and evening, resulting in modest northwest to north winds. 
showers and thunderstorms are expected late tonight through 
friday, both ahead of and along the front. severe weather is not 
anticipated at this time.

light north winds on saturday will then become easterly saturday
night and sunday before increasing into monday. 29.4 inch low 
pressure is forecast to track northeastward from the central great
plains (sunday night) near or over lake michigan (monday night), 
with gusty east to southeast winds ahead of its arrival and gusty 
west winds behind it (into tuesday). not seeing widespread gale 
potential with this system, though trends will be monitored.


lmz364-366-563-565-567-868-240930-
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-
848 pm cdt thu apr 23 2026

rock island passage to charlevoix mi south to sheboygan wi to
pentwater mi...

.rest of tonight...southeast winds 10 to 20 kt. chance of rain
showers and thunderstorms overnight. waves 3 to 5 ft. 
.friday...southeast winds 10 to 20 kt veering to west. patchy
fog. chance of rain showers and slight chance of thunderstorms in
the morning, then chance of rain showers and thunderstorms in the
afternoon. waves 3 to 5 ft. 
.friday night...north winds 10 to 20 kt. patchy fog in the
evening. waves 2 to 4 ft. 
.saturday...north winds 10 to 20 kt. waves 2 to 4 ft. 
.saturday night...northeast winds 10 to 20 kt becoming east 5 to
10 kt overnight. waves 1 to 3 ft. 
.sunday...east winds 5 to 10 kt becoming northeast 10 to 15 kt.
waves 1 to 2 ft. 
.sunday night...northeast winds 10 to 15 kt becoming southeast
10 to 20 kt. waves 1 to 3 ft building to 3 to 5 ft. 
.monday...east winds 15 to 25 kt becoming southeast to 30 kt.
waves 4 to 7 ft occasionally to 9 ft building to 7 to 10 ft
occasionally to 13 ft. 
.tuesday...southwest winds to 30 kt. chance of rain showers.
waves 8 to 11 ft occasionally to 14 ft subsiding to 6 to 9 ft
occasionally to 12 ft.  

$$

fzus63 kmkx 240148
glflm 
expires:202604240930;;883450

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
848 pm cdt thu apr 23 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...

areas of fog will continue over the lake into friday due to 
relatively mild and moist air flowing over the cold lake. modest 
south to southeast winds will persist into friday as a trough of 
low pressure and cold front approaches from minnesota and iowa. 
however, breezy easterly winds are expected over the northern tip 
of the lake through friday afternoon, as the warm front will 
stall before reaching the upper peninsula. 

the low will pull a cold front across lake michigan friday afternoon 
and evening, resulting in modest northwest to north winds. 
showers and thunderstorms are expected late tonight through 
friday, both ahead of and along the front. severe weather is not 
anticipated at this time.

light north winds on saturday will then become easterly saturday
night and sunday before increasing into monday. 29.4 inch low 
pressure is forecast to track northeastward from the central great
plains (sunday night) near or over lake michigan (monday night), 
with gusty east to southeast winds ahead of its arrival and gusty 
west winds behind it (into tuesday). not seeing widespread gale 
potential with this system, though trends will be monitored.


lmz080-669-671-673-675-777-779-870-872-874-876-878-240930-
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 pm cdt thu apr 23 2026

sheboygan wi to pentwater mi south...

.rest of tonight...south winds 10 to 20 kt. chance of rain
showers and thunderstorms overnight. waves 3 to 5 ft. 
.friday...south winds 10 to 20 kt veering to west. chance of rain
showers and thunderstorms in the morning, then chance of rain
showers and slight chance of thunderstorms in the afternoon.
waves 3 to 5 ft. 
.friday night...northwest winds 10 to 15 kt becoming north 10 to
20 kt. waves 2 to 4 ft. 
.saturday...north winds 10 to 20 kt. waves 3 to 5 ft. 
.saturday night...north winds 10 to 20 kt becoming east 10 to
15 kt. waves 2 to 4 ft. 
.sunday...east winds 10 to 15 kt becoming northeast. waves 1 to
3 ft. 
.sunday night...east winds 10 to 20 kt. waves 2 to 4 ft building
to 4 to 6 ft occasionally to 8 ft. 
.monday...southeast winds to 30 kt. chance of rain showers and
thunderstorms. waves 5 to 8 ft occasionally to 10 ft building to
8 to 11 ft occasionally to 14 ft. 
.tuesday...southwest winds to 30 kt. waves 6 to 9 ft occasionally
to 12 ft subsiding to 4 to 7 ft occasionally to 9 ft.  

$$

fzus63 kmqt 240202
glfls 
expires:202604240800;;883814

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt thu apr 23 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 continues over james bay tonight while a 29.2 inch low sits 
over southern manitoba. between now and friday evening, the james 
bay high persists while the canadian low swings farther north into 
manitoba, sending troughing of around 29.6 inches across lake 
superior. late friday and into saturday, the parent low weakens 
considerably as remnant troughing moves south and 30.0 inch ridging 
builds over lake superior by late saturday. this ridge builds to 
30.1 inches by late sunday and persists into early monday. 
meanwhile, a 29.3 inch colorado low develops, moving towards the 
upper midwest by early monday, causing pressure over lake superior 
to fall rapidly toward 29.7 inches by mid-monday. lake superior 
pressure continues to fall as this 29.3 inch low reaches mn/wi by 
late monday and lake superior by early tuesday, causing pressure 
over the lake to remain low near 29.3 throughout tuesday. this low 
lifts north into ontario wednesday morning, and lake superior 
pressures increase to 29.8 inches by wednesday midday.



lsz162-240800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 pm edt thu apr 23 2026 /901 pm cdt thu apr 23 2026/

.rest of tonight...east winds 10 to 20 knots backing northeast
late. rain showers likely and a chance of thunderstorms. waves
3 to 6 feet occasionally to 8 feet. 
.friday...west winds 10 to 20 knots diminishing to 5 to 15 knots
late. a chance of rain showers. waves subsiding to 2 to 4 feet. 
.friday night...west winds 5 to 15 knots veering north after
midnight, then backing northwest late. waves subsiding to calm to
2 feet. 
.saturday...northwest winds 5 to 15 knots veering east by mid
afternoon. waves calm to 2 feet. 
.saturday night...east winds 5 to 15 knots backing northeast
after midnight. waves calm to 2 feet. 
.sunday...northeast winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. waves calm to 2 feet. 
.sunday night...east winds 10 to 20 knots becoming northeast
15 to 25 knots after midnight. waves building to 3 to 5 feet
occasionally to 7 feet. 
.monday...east winds 20 to 30 knots backing northeast. rain
showers likely. waves building to 7 to 10 feet occasionally to
13 feet, then subsiding to 5 to 8 feet occasionally to 10 feet. 
.tuesday...west winds 20 to 30 knots diminishing to 15 to
25 knots. a chance of rain showers. waves subsiding to 1 to
3 feet. 

$$

fzus63 kmqt 240202
glfls 
expires:202604240800;;883815

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt thu apr 23 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 continues over james bay tonight while a 29.2 inch low sits 
over southern manitoba. between now and friday evening, the james 
bay high persists while the canadian low swings farther north into 
manitoba, sending troughing of around 29.6 inches across lake 
superior. late friday and into saturday, the parent low weakens 
considerably as remnant troughing moves south and 30.0 inch ridging 
builds over lake superior by late saturday. this ridge builds to 
30.1 inches by late sunday and persists into early monday. 
meanwhile, a 29.3 inch colorado low develops, moving towards the 
upper midwest by early monday, causing pressure over lake superior 
to fall rapidly toward 29.7 inches by mid-monday. lake superior 
pressure continues to fall as this 29.3 inch low reaches mn/wi by 
late monday and lake superior by early tuesday, causing pressure 
over the lake to remain low near 29.3 throughout tuesday. this low 
lifts north into ontario wednesday morning, and lake superior 
pressures increase to 29.8 inches by wednesday midday.



lsz263-240800-
lake superior from saxon harbor wi to upper entrance to portage
canal mi 5nm off shore to the us/canadian border including isle
royale national park-
1001 pm edt thu apr 23 2026

.rest of tonight...southeast winds 20 to 30 knots. rain showers
and a chance of thunderstorms. waves 6 to 9 feet occasionally to
11 feet building to 7 to 10 feet occasionally to 13 feet. 
.friday...west winds 20 to 30 knots diminishing to 10 to
20 knots. rain showers and a slight chance of thunderstorms
through early afternoon, then a chance of rain showers by mid
afternoon. waves subsiding to 3 to 6 feet occasionally to 8 feet.
.friday night...northwest winds 10 to 20 knots becoming north
5 to 15 knots after midnight, then backing northwest late. waves
subsiding to calm to 2 feet. 
.saturday...northwest winds 5 to 15 knots backing south by mid
afternoon. waves calm to 2 feet. 
.saturday night...east winds 5 to 15 knots diminishing to less
than 10 knots after midnight. waves calm to 2 feet. 
.sunday...east winds 5 to 15 knots backing northeast by mid
afternoon. waves calm to 2 feet. 
.sunday night...east winds 5 to 15 knots increasing to 10 to
20 knots after midnight. waves building to 1 to 3 feet. 
.monday...east winds 20 to 30 knots increasing to gales to
35 knots. a chance of rain showers, then rain showers likely.
waves building to 10 to 14 feet occasionally to 18 feet, then
subsiding to 8 to 11 feet occasionally to 14 feet. 
.tuesday...west gales to 35 knots diminishing to 15 to 25 knots.
a chance of rain showers. waves subsiding to 4 to 8 feet
occasionally to 10 feet. 

$$

fzus63 kmqt 240202
glfls 
expires:202604240800;;883816

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt thu apr 23 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 continues over james bay tonight while a 29.2 inch low sits 
over southern manitoba. between now and friday evening, the james 
bay high persists while the canadian low swings farther north into 
manitoba, sending troughing of around 29.6 inches across lake 
superior. late friday and into saturday, the parent low weakens 
considerably as remnant troughing moves south and 30.0 inch ridging 
builds over lake superior by late saturday. this ridge builds to 
30.1 inches by late sunday and persists into early monday. 
meanwhile, a 29.3 inch colorado low develops, moving towards the 
upper midwest by early monday, causing pressure over lake superior 
to fall rapidly toward 29.7 inches by mid-monday. lake superior 
pressure continues to fall as this 29.3 inch low reaches mn/wi by 
late monday and lake superior by early tuesday, causing pressure 
over the lake to remain low near 29.3 throughout tuesday. this low 
lifts north into ontario wednesday morning, and lake superior 
pressures increase to 29.8 inches by wednesday midday.



lsz264-240800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
1001 pm edt thu apr 23 2026

...gale warning in effect through friday afternoon...

.rest of tonight...southeast gales to 35 knots. a chance of rain
showers by midnight. a chance of thunderstorms. rain showers
likely after midnight. waves 7 to 11 feet occasionally to
13 feet. 
.friday...southeast gales to 35 knots diminishing to 20 to
30 knots in the afternoon, then becoming west 15 to 25 knots
late. rain showers and a slight chance of thunderstorms through
early afternoon, then a chance of rain showers by mid afternoon.
waves subsiding to 5 to 8 feet occasionally to 10 feet. 
.friday night...northwest winds 5 to 15 knots veering north after
midnight. a slight chance of rain showers through midnight. waves
subsiding to 1 to 3 feet. 
.saturday...northwest winds 5 to 15 knots. waves subsiding to
calm to 2 feet. 
.saturday night...east winds less than 10 knots. waves calm to
2 feet. 
.sunday...east winds 5 to 15 knots. waves calm to 2 feet. 
.sunday night...east winds 5 to 15 knots. waves calm to 2 feet. 
.monday...east gales to 40 knots. a chance of rain showers, then
rain showers likely. waves building to 10 to 14 feet occasionally
to 18 feet, then subsiding to 9 to 12 feet occasionally to
15 feet. 
.tuesday...west gales to 40 knots diminishing to 20 to 30 knots.
a chance of rain showers. waves subsiding to 3 to 6 feet
occasionally to 8 feet, then building to 4 to 7 feet occasionally
to 9 feet. 

$$

fzus63 kmqt 240202
glfls 
expires:202604240800;;883817

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt thu apr 23 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 continues over james bay tonight while a 29.2 inch low sits 
over southern manitoba. between now and friday evening, the james 
bay high persists while the canadian low swings farther north into 
manitoba, sending troughing of around 29.6 inches across lake 
superior. late friday and into saturday, the parent low weakens 
considerably as remnant troughing moves south and 30.0 inch ridging 
builds over lake superior by late saturday. this ridge builds to 
30.1 inches by late sunday and persists into early monday. 
meanwhile, a 29.3 inch colorado low develops, moving towards the 
upper midwest by early monday, causing pressure over lake superior 
to fall rapidly toward 29.7 inches by mid-monday. lake superior 
pressure continues to fall as this 29.3 inch low reaches mn/wi by 
late monday and lake superior by early tuesday, causing pressure 
over the lake to remain low near 29.3 throughout tuesday. this low 
lifts north into ontario wednesday morning, and lake superior 
pressures increase to 29.8 inches by wednesday midday.



lsz265-240800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
1001 pm edt thu apr 23 2026

.rest of tonight...southeast winds 20 to 30 knots. a chance of
showers and thunderstorms. waves 4 to 7 feet occasionally to
9 feet. 
.friday...southeast winds to 30 knots with a few gale force gusts
to 35 knots possible diminishing to 20 to 30 knots in the
afternoon, then becoming west 15 to 25 knots late. rain showers
and a slight chance of thunderstorms through early afternoon,
then a chance of rain showers 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...west winds 10 to 20 knots veering northwest after
midnight. waves subsiding to calm to 2 feet. 
.saturday...northwest winds 10 to 20 knots becoming north 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.saturday night...east winds 5 to 15 knots veering southeast
after midnight. waves calm to 2 feet. 
.sunday...southeast winds 5 to 15 knots becoming east 10 to
20 knots by mid afternoon. waves calm to 2 feet. 
.sunday night...east winds 10 to 20 knots veering southeast after
midnight. waves calm to 2 feet. 
.monday...east gales to 35 knots becoming southeast gales to
40 knots. a chance of rain showers, then rain showers likely.
waves building to 10 to 14 feet occasionally to 18 feet, then
subsiding to 9 to 12 feet occasionally to 15 feet. 
.tuesday...west gales to 40 knots. a chance of rain showers.
waves subsiding to 4 to 7 feet occasionally to 9 feet, then
building to 6 to 9 feet occasionally to 11 feet. 

$$

fzus63 kmqt 240202
glfls 
expires:202604240800;;883818

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt thu apr 23 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 continues over james bay tonight while a 29.2 inch low sits 
over southern manitoba. between now and friday evening, the james 
bay high persists while the canadian low swings farther north into 
manitoba, sending troughing of around 29.6 inches across lake 
superior. late friday and into saturday, the parent low weakens 
considerably as remnant troughing moves south and 30.0 inch ridging 
builds over lake superior by late saturday. this ridge builds to 
30.1 inches by late sunday and persists into early monday. 
meanwhile, a 29.3 inch colorado low develops, moving towards the 
upper midwest by early monday, causing pressure over lake superior 
to fall rapidly toward 29.7 inches by mid-monday. lake superior 
pressure continues to fall as this 29.3 inch low reaches mn/wi by 
late monday and lake superior by early tuesday, causing pressure 
over the lake to remain low near 29.3 throughout tuesday. this low 
lifts north into ontario wednesday morning, and lake superior 
pressures increase to 29.8 inches by wednesday midday.



lsz266-240800-
lake superior east of a line from manitou island to marquette mi
and west of a line from grand marais mi to the us/canadian border
beyond 5nm from shore-
1001 pm edt thu apr 23 2026

...gale warning in effect through friday afternoon...

.rest of tonight...southeast gales to 35 knots. a chance of rain
showers and a slight chance of thunderstorms. waves 6 to 9 feet
occasionally to 11 feet building to 8 to 11 feet occasionally to
14 feet. 
.friday...southeast gales to 35 knots diminishing to 20 to
30 knots late. a chance of rain showers through early afternoon.
a slight chance of thunderstorms. rain showers by mid afternoon.
waves subsiding to 4 to 7 feet occasionally to 9 feet. 
.friday night...west winds 10 to 20 knots veering northwest after
midnight. a chance of rain showers. waves subsiding to calm to
2 feet. 
.saturday...northwest winds 10 to 20 knots becoming north 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.saturday night...east winds 5 to 15 knots veering southeast
after midnight. waves calm to 2 feet. 
.sunday...southeast winds 5 to 15 knots backing east by mid
afternoon. waves calm to 2 feet. 
.sunday night...east winds 5 to 15 knots becoming southeast 10 to
20 knots after midnight. waves building to 1 to 3 feet. 
.monday...east gales to 40 knots veering southeast. a chance of
rain showers, then rain showers likely. waves building to 10 to
14 feet occasionally to 18 feet, then subsiding to 9 to 12 feet
occasionally to 15 feet. 
.tuesday...west gales to 40 knots. a chance of rain showers.
waves subsiding to 5 to 8 feet occasionally to 10 feet, then
building to 7 to 10 feet occasionally to 13 feet. 

$$

fzus63 kmqt 240202
glfls 
expires:202604240800;;883819

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt thu apr 23 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 continues over james bay tonight while a 29.2 inch low sits 
over southern manitoba. between now and friday evening, the james 
bay high persists while the canadian low swings farther north into 
manitoba, sending troughing of around 29.6 inches across lake 
superior. late friday and into saturday, the parent low weakens 
considerably as remnant troughing moves south and 30.0 inch ridging 
builds over lake superior by late saturday. this ridge builds to 
30.1 inches by late sunday and persists into early monday. 
meanwhile, a 29.3 inch colorado low develops, moving towards the 
upper midwest by early monday, causing pressure over lake superior 
to fall rapidly toward 29.7 inches by mid-monday. lake superior 
pressure continues to fall as this 29.3 inch low reaches mn/wi by 
late monday and lake superior by early tuesday, causing pressure 
over the lake to remain low near 29.3 throughout tuesday. this low 
lifts north into ontario wednesday morning, and lake superior 
pressures increase to 29.8 inches by wednesday midday.



lsz267-240800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
1001 pm edt thu apr 23 2026

...gale warning in effect through friday afternoon...

.rest of tonight...southeast winds 20 to 30 knots increasing to
gales to 35 knots after midnight. a slight chance of rain showers
after midnight. waves 3 to 6 feet occasionally to 8 feet building
to 5 to 8 feet occasionally to 10 feet. 
.friday...southeast gales to 40 knots diminishing to 20 to
30 knots late. a slight chance of rain showers through early
afternoon, then rain showers likely and a slight chance of
thunderstorms by mid afternoon. waves building to 6 to 9 feet
occasionally to 11 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet. 
.friday night...southeast winds 10 to 20 knots backing east late.
rain showers likely through midnight, then a chance of rain
showers after midnight. waves subsiding to calm to 2 feet. 
.saturday...southeast winds 10 to 20 knots becoming east 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.saturday night...east winds 5 to 15 knots veering southeast
after midnight. waves calm to 2 feet. 
.sunday...southeast winds 5 to 15 knots backing east by mid
afternoon. waves calm to 2 feet. 
.sunday night...east winds 5 to 15 knots veering southeast after
midnight. waves calm to 2 feet. 
.monday...southeast gales to 40 knots. rain showers likely. waves
building to 9 to 12 feet occasionally to 15 feet, then subsiding
to 7 to 10 feet occasionally to 13 feet. 
.tuesday...southwest gales to 35 knots becoming west 20 to
30 knots. rain showers likely, then a chance of rain showers.
waves subsiding to 5 to 8 feet occasionally to 10 feet, then
building to 7 to 10 feet occasionally to 13 feet. 

$$