fzus63 kdtx 231314
glflh 
expires:202604232115;;854368

open lake forecast for lake huron
national weather service detroit/pontiac mi
914 am 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...high pressure holds over the region today before a
warm front slowly lifts into the area late today into friday. a
low will develop along the front and track across the southern
great lakes friday night.


lhz361-362-232115-
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-
914 am edt thu apr 23 2026

.rest of today...east winds 15 to 20 knots. waves 3 to 5 feet 
building to 4 to 6 feet late in the afternoon. waves occasionally 
around 8 feet. 
.tonight...east winds 15 to 20 knots increasing to 20 to 25 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. a chance of showers in the afternoon. waves 8 to
12 feet. waves occasionally around 15 feet. 
.friday night...east winds 15 to 20 knots. showers in the
evening...then showers likely after midnight. waves 6 to 9 feet.
waves occasionally around 12 feet. 
.saturday...northeast winds 10 to 15 knots. a chance of showers.
waves 3 to 5 feet subsiding to 1 to 3 feet late in the evening. 
.sunday...north winds 5 to 10 knots veering to the northeast by
midnight. waves 2 feet or less. 
.monday...east winds 5 to 10 knots increasing to 20 to 25 knots
with gusts to 35 knot gales. a chance of showers . waves 1 to
3 feet building to 10 to 14 feet. waves occasionally around
18 feet. 


$$

fzus63 kdtx 231314
glflh 
expires:202604232115;;854369

open lake forecast for lake huron
national weather service detroit/pontiac mi
914 am 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...high pressure holds over the region today before a
warm front slowly lifts into the area late today into friday. a
low will develop along the front and track across the southern
great lakes friday night.


lhz363-232115-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
914 am edt thu apr 23 2026

.rest of today...east winds 5 to 15 knots. waves 2 feet or less. 
.tonight...east winds 10 to 15 knots. waves 1 to 3 feet building
to 2 to 4 feet in the late evening and overnight. 
.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...north winds 10 to 15 knots decreasing to 5 to
10 knots late in the evening. showers likely in the morning...
then a chance of showers late in the morning. waves 2 to 4 feet
subsiding to 1 to 3 feet late in the evening. 
.sunday...north winds 5 to 10 knots veering to the northeast by
midnight. waves 2 feet or less. 
.monday...east winds 5 to 10 knots increasing to 20 to 25 knots
with gusts to around 30 knots. showers likely by midnight. waves
2 feet or less building to 8 to 12 feet. waves occasionally
around 15 feet. 


$$

fzus63 kdtx 231314
glflh 
expires:202604232115;;854370

open lake forecast for lake huron
national weather service detroit/pontiac mi
914 am 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...high pressure holds over the region today before a
warm front slowly lifts into the area late today into friday. a
low will develop along the front and track across the southern
great lakes friday night.


lhz462>464-232115-
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-
914 am edt thu apr 23 2026

.rest of today...east winds 5 to 10 knots. waves 2 feet or less. 
.tonight...east winds 5 to 10 knots becoming southeast 10 to
15 knots early in the morning. waves 1 to 3 feet. 
.friday...southeast winds 10 to 15 knots. a chance of showers in
the afternoon. waves 2 to 4 feet. 
.friday night...southeast winds 10 to 15 knots. showers in the
evening...then showers likely after midnight. waves 2 to 4 feet. 
.saturday...north winds 10 to 15 knots decreasing to 5 to
10 knots late in the evening. a chance of showers. waves 2 to
4 feet subsiding to 1 to 3 feet. 
.sunday...north winds 5 to 10 knots. waves 2 feet or less. 
.monday...east winds 5 to 10 knots becoming southeast 20 to
25 knots with gusts to 35 knot gales. a chance of showers early
in the evening. rain showers likely by midnight. waves 1 to
3 feet building to 8 to 12 feet. waves occasionally around
15 feet. 


$$

fzus63 kmkx 231412
glflm 
expires:202604232130;;856089

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
912 am 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...

patchy fog over the lake today due to relatively mild and moist 
air flowing over the cold lake surface. modest south to southeast
winds developing today and lasting into friday as a trough of low
pressure and cold front approaches from the great plains. however,
breezy easterly winds are expected over the northern tip of the 
lake today into friday, as the warm front will stall before 
reaching said location. 

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

northerly winds will continue through the weekend across lake 
michigan, predominantly due north saturday and northeast sunday. 
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.


lmz261-362-232130-
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-
912 am cdt thu apr 23 2026

rock island passage to charlevoix mi north...

.rest of today...southeast winds 10 to 20 kt becoming east 15 to
25 kt. waves 2 to 4 ft. 
.tonight...east winds to 30 kt. slight chance of rain showers
overnight. waves 4 to 7 ft occasionally to 9 ft. 
.friday...east winds to 30 kt. chance of rain showers in the
morning, then rain showers likely in the afternoon. waves 4 to
7 ft occasionally to 9 ft. 
.friday night...northeast winds to 30 kt diminishing to 15 to
25 kt. chance of rain showers. waves 4 to 6 ft occasionally to
8 ft subsiding to 2 to 4 ft. 
.saturday...north winds 10 to 20 kt. waves 1 to 3 ft. 
.saturday night...northeast winds 10 to 15 kt diminishing to 5 to
10 kt. waves 1 ft or less. 
.sunday...northeast winds 5 to 10 kt increasing to 10 to 15 kt.
waves nearly calm. 
.monday...east winds 15 to 25 kt increasing to 30 kt. chance of
rain showers. waves 2 to 4 ft building to 4 to 6 ft occasionally
to 8 ft.  

$$

fzus63 kmkx 231412
glflm 
expires:202604232130;;856090

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
912 am 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...

patchy fog over the lake today due to relatively mild and moist 
air flowing over the cold lake surface. modest south to southeast
winds developing today and lasting into friday as a trough of low
pressure and cold front approaches from the great plains. however,
breezy easterly winds are expected over the northern tip of the 
lake today into friday, as the warm front will stall before 
reaching said location. 

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

northerly winds will continue through the weekend across lake 
michigan, predominantly due north saturday and northeast sunday. 
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.


lmz364-366-563-565-567-868-232130-
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-
912 am cdt thu apr 23 2026

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

.rest of today...south winds 10 to 15 kt increasing to 10 to
20 kt. patchy fog. waves 3 to 5 ft. 
.tonight...southeast winds 10 to 20 kt. chance of rain showers
and thunderstorms overnight. waves 4 to 6 ft occasionally to
8 ft. 
.friday...southeast winds 10 to 20 kt becoming southwest. rain
showers likely in the morning, then rain showers likely with a
chance of thunderstorms in the afternoon. waves 4 to 6 ft
occasionally to 8 ft subsiding to 3 to 5 ft. 
.friday night...northwest winds 10 to 20 kt becoming north.
chance of rain showers in the evening. waves 3 to 5 ft. 
.saturday...north winds 10 to 20 kt. waves 2 to 4 ft. 
.saturday night...northeast winds 10 to 15 kt diminishing to 5 to
10 kt. waves 1 to 3 ft. 
.sunday...northeast winds 5 to 10 kt increasing to 10 to 15 kt.
waves 1 to 2 ft. 
.monday...east winds to 30 kt. chance of rain showers. waves 6 to
9 ft occasionally to 12 ft.  

$$

fzus63 kmkx 231412
glflm 
expires:202604232130;;856091

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
912 am 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...

patchy fog over the lake today due to relatively mild and moist 
air flowing over the cold lake surface. modest south to southeast
winds developing today and lasting into friday as a trough of low
pressure and cold front approaches from the great plains. however,
breezy easterly winds are expected over the northern tip of the 
lake today into friday, as the warm front will stall before 
reaching said location. 

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

northerly winds will continue through the weekend across lake 
michigan, predominantly due north saturday and northeast sunday. 
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.


lmz080-669-671-673-675-777-779-870-872-874-876-878-232130-
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-
912 am cdt thu apr 23 2026

sheboygan wi to pentwater mi south...

.rest of today...south winds 10 to 15 kt becoming southeast 10 to
20 kt. patchy fog. waves 2 to 4 ft building to 3 to 5 ft. 
.tonight...southeast winds 10 to 20 kt becoming south. chance of
showers and thunderstorms overnight. waves 4 to 6 ft occasionally
to 8 ft. 
.friday...south winds 10 to 20 kt becoming southwest. rain
showers likely with a chance of thunderstorms in the morning,
then rain showers likely in the afternoon. waves 4 to 6 ft
occasionally to 8 ft subsiding to 3 to 5 ft. 
.friday night...west winds 10 to 15 kt becoming northwest 10 to
20 kt. waves 3 to 5 ft. 
.saturday...north winds 10 to 20 kt. waves 3 to 5 ft. 
.saturday night...north winds 10 to 15 kt becoming northeast 5 to
10 kt. waves 2 to 4 ft. 
.sunday...east winds 5 to 10 kt becoming northeast 10 to 15 kt.
waves 1 to 3 ft. 
.monday...southeast winds to 30 kt. rain showers likely. waves
7 to 10 ft occasionally to 13 ft.  

$$

fzus63 kmqt 231401
glfls 
expires:202604232000;;855429

open lake forecast for lake superior
national weather service marquette mi
1000 am 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...

this morning, lake superior is between ridging over northern ontario 
and low pressure straddling the us/canada border at north dakota, 
resulting in a rather tight pressure gradient across the lake of 
30.0 inches near whitefish bay and 29.7 inches near duluth. 
throughout today, the ontario ridge will progress slightly eastward 
while the low weakens, sending a 29.6 inch trough across of lake 
superior by friday midday. as the parent low weakens to 29.9 inches 
friday into saturday and remnant troughing moves south, 30.0 inch 
ridging will build 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 29.5 inches by mid-monday. this low stalls 
out over nothern mn, causing lake superior pressures to remain low 
near 29.3 inches throughout tuesday.



lsz162-232000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 am edt thu apr 23 2026 /900 am cdt thu apr 23 2026/

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

$$

fzus63 kmqt 231401
glfls 
expires:202604232000;;855430

open lake forecast for lake superior
national weather service marquette mi
1000 am 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...

this morning, lake superior is between ridging over northern ontario 
and low pressure straddling the us/canada border at north dakota, 
resulting in a rather tight pressure gradient across the lake of 
30.0 inches near whitefish bay and 29.7 inches near duluth. 
throughout today, the ontario ridge will progress slightly eastward 
while the low weakens, sending a 29.6 inch trough across of lake 
superior by friday midday. as the parent low weakens to 29.9 inches 
friday into saturday and remnant troughing moves south, 30.0 inch 
ridging will build 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 29.5 inches by mid-monday. this low stalls 
out over nothern mn, causing lake superior pressures to remain low 
near 29.3 inches throughout tuesday.



lsz263-232000-
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-
1000 am edt thu apr 23 2026

.rest of today...southeast winds 15 to 25 knots backing east in
the afternoon. a chance of rain showers and a slight chance of
thunderstorms by mid afternoon. waves 3 to 6 feet occasionally to
8 feet building to 4 to 7 feet occasionally to 9 feet. 
.tonight...southeast winds 20 to 30 knots. rain showers and a
chance of thunderstorms. waves building to 6 to 10 feet
occasionally to 13 feet. 
.friday...west winds 20 to 30 knots diminishing to 10 to
20 knots. rain showers likely and a slight chance of
thunderstorms through early afternoon, then a chance of rain
showers by mid afternoon. waves subsiding to 4 to 7 feet
occasionally to 9 feet. 
.friday night...northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. a slight chance of rain showers.
waves subsiding to 1 to 3 feet. 
.saturday...west winds 5 to 15 knots backing southwest by mid
afternoon. waves subsiding to calm to 2 feet. 
.saturday night...southeast 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 increasing to 10 to 20 knots.
waves building to 1 to 3 feet. 
.monday...east winds 20 to 30 knots. a chance of rain showers,
then rain showers likely. waves building to 6 to 9 feet
occasionally to 11 feet. 

$$

fzus63 kmqt 231401
glfls 
expires:202604232000;;855431

open lake forecast for lake superior
national weather service marquette mi
1000 am 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...

this morning, lake superior is between ridging over northern ontario 
and low pressure straddling the us/canada border at north dakota, 
resulting in a rather tight pressure gradient across the lake of 
30.0 inches near whitefish bay and 29.7 inches near duluth. 
throughout today, the ontario ridge will progress slightly eastward 
while the low weakens, sending a 29.6 inch trough across of lake 
superior by friday midday. as the parent low weakens to 29.9 inches 
friday into saturday and remnant troughing moves south, 30.0 inch 
ridging will build 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 29.5 inches by mid-monday. this low stalls 
out over nothern mn, causing lake superior pressures to remain low 
near 29.3 inches throughout tuesday.



lsz264-232000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
1000 am edt thu apr 23 2026

...gale warning in effect from 8 pm edt this evening through
friday afternoon...

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

$$

fzus63 kmqt 231401
glfls 
expires:202604232000;;855432

open lake forecast for lake superior
national weather service marquette mi
1000 am 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...

this morning, lake superior is between ridging over northern ontario 
and low pressure straddling the us/canada border at north dakota, 
resulting in a rather tight pressure gradient across the lake of 
30.0 inches near whitefish bay and 29.7 inches near duluth. 
throughout today, the ontario ridge will progress slightly eastward 
while the low weakens, sending a 29.6 inch trough across of lake 
superior by friday midday. as the parent low weakens to 29.9 inches 
friday into saturday and remnant troughing moves south, 30.0 inch 
ridging will build 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 29.5 inches by mid-monday. this low stalls 
out over nothern mn, causing lake superior pressures to remain low 
near 29.3 inches throughout tuesday.



lsz265-232000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
1000 am edt thu apr 23 2026

.rest of today...southeast winds 15 to 25 knots increasing to
20 to 30 knots in the afternoon. waves 3 to 6 feet occasionally
to 8 feet. 
.tonight...southeast winds 20 to 30 knots. a chance of showers
and thunderstorms. waves building to 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. 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 increasing to 15 to
25 knots after midnight. a chance of rain showers. waves
subsiding to calm to 2 feet. 
.saturday...west winds 15 to 25 knots becoming north 10 to
20 knots by mid afternoon. waves calm to 2 feet. 
.saturday night...southeast winds 10 to 20 knots becoming south
5 to 15 knots after midnight. waves calm to 2 feet. 
.sunday...east winds 5 to 15 knots becoming southeast 10 to
20 knots. waves calm to 2 feet. 
.monday...east gales to 35 knots. a chance of rain showers, then
rain showers likely. waves building to 7 to 11 feet occasionally
to 14 feet. 

$$

fzus63 kmqt 231401
glfls 
expires:202604232000;;855433

open lake forecast for lake superior
national weather service marquette mi
1000 am 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...

this morning, lake superior is between ridging over northern ontario 
and low pressure straddling the us/canada border at north dakota, 
resulting in a rather tight pressure gradient across the lake of 
30.0 inches near whitefish bay and 29.7 inches near duluth. 
throughout today, the ontario ridge will progress slightly eastward 
while the low weakens, sending a 29.6 inch trough across of lake 
superior by friday midday. as the parent low weakens to 29.9 inches 
friday into saturday and remnant troughing moves south, 30.0 inch 
ridging will build 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 29.5 inches by mid-monday. this low stalls 
out over nothern mn, causing lake superior pressures to remain low 
near 29.3 inches throughout tuesday.



lsz266-232000-
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-
1000 am edt thu apr 23 2026

...gale warning in effect from 8 pm edt this evening through
friday afternoon...

.rest of today...southeast winds 20 to 30 knots. waves 3 to
6 feet occasionally to 8 feet building to 5 to 8 feet
occasionally to 10 feet. 
.tonight...southeast gales to 35 knots. a chance of rain showers
and a slight chance of thunderstorms. waves building to 8 to
11 feet occasionally to 14 feet. 
.friday...southeast gales to 35 knots diminishing to 20 to
30 knots late. rain showers and a slight chance of thunderstorms.
waves subsiding to 5 to 8 feet occasionally to 10 feet. 
.friday night...west winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. a chance of rain showers. waves
subsiding to 1 to 3 feet. 
.saturday...northwest winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. a slight chance of rain showers
through early afternoon. waves subsiding to calm to 2 feet. 
.saturday night...northwest winds 5 to 15 knots veering east
after midnight. waves calm to 2 feet. 
.sunday...southeast winds 5 to 15 knots becoming east 10 to
20 knots. waves building to 1 to 3 feet. 
.monday...east gales to 35 knots. a chance of rain showers. waves
building to 7 to 10 feet occasionally to 13 feet. 

$$

fzus63 kmqt 231401
glfls 
expires:202604232000;;855434

open lake forecast for lake superior
national weather service marquette mi
1000 am 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...

this morning, lake superior is between ridging over northern ontario 
and low pressure straddling the us/canada border at north dakota, 
resulting in a rather tight pressure gradient across the lake of 
30.0 inches near whitefish bay and 29.7 inches near duluth. 
throughout today, the ontario ridge will progress slightly eastward 
while the low weakens, sending a 29.6 inch trough across of lake 
superior by friday midday. as the parent low weakens to 29.9 inches 
friday into saturday and remnant troughing moves south, 30.0 inch 
ridging will build 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 29.5 inches by mid-monday. this low stalls 
out over nothern mn, causing lake superior pressures to remain low 
near 29.3 inches throughout tuesday.



lsz267-232000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
1000 am edt thu apr 23 2026

...gale warning in effect from 8 pm edt this evening through
friday afternoon...

.rest of today...southeast winds 15 to 25 knots increasing to
20 to 30 knots in the afternoon. waves 2 to 4 feet building to
3 to 6 feet occasionally to 8 feet. 
.tonight...southeast winds 20 to 30 knots increasing to gales to
35 knots after midnight. a slight chance of rain showers after
midnight. waves building to 5 to 8 feet occasionally to 10 feet. 
.friday...southeast gales to 40 knots diminishing to 20 to
30 knots late. a 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 6 feet occasionally to 8 feet. 
.friday night...southeast winds 15 to 25 knots becoming south
10 to 20 knots after midnight. rain showers likely through
midnight, then a chance of rain showers after midnight. waves
subsiding to 1 to 3 feet. 
.saturday...west winds 10 to 20 knots. a slight chance of rain
showers through early afternoon. waves subsiding to calm to
2 feet. 
.saturday night...west winds 5 to 15 knots backing east after
midnight. waves calm to 2 feet. 
.sunday...east winds 5 to 15 knots. waves calm to 2 feet. 
.monday...east winds 20 to 30 knots becoming southeast gales to
35 knots. a chance of rain showers. waves building to 5 to 9 feet
occasionally to 11 feet. 

$$