fzus63 kdtx 221938
glflh 
expires:202604230345;;814394

open lake forecast for lake huron
national weather service detroit/pontiac mi
338 pm edt wed apr 22 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 cold front settled over lake erie offers a chance
for a few evening storms. high pressure holds over the region
thursday before a warm front slowly lifts into the area late
thursday into friday. a low will develop along the front and
track across the southern great lakes friday night.


lhz361-362-230345-
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-
338 pm edt wed apr 22 2026

.tonight...light and variable winds becoming east 5 to 10 knots
early in the morning. waves 2 feet or less. 
.thursday...east winds 5 to 10 knots increasing to 10 to 15 knots
in the late morning and afternoon. waves 1 to 3 feet building to
3 to 5 feet in the late morning and afternoon. 
.thursday night...east winds 15 to 20 knots increasing to 20 to
25 knots after midnight. waves 5 to 7 feet. waves occasionally
around 10 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 likely. waves
6 to 9 feet. waves occasionally around 12 feet. 
.saturday...east winds 15 to 20 knots becoming northeast 10 to
15 knots late in the morning...then becoming northwest 5 to
10 knots late in the afternoon. showers likely in the morning...
then a chance of showers late in the morning. waves 4 to 6 feet
subsiding to 1 to 3 feet. waves occasionally around 8 feet. 
.sunday...north winds 5 to 10 knots veering to the east by
midnight. waves 2 feet or less. 
.monday...east winds 5 to 10 knots becoming southeast to 30 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 221938
glflh 
expires:202604230345;;814395

open lake forecast for lake huron
national weather service detroit/pontiac mi
338 pm edt wed apr 22 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 cold front settled over lake erie offers a chance
for a few evening storms. high pressure holds over the region
thursday before a warm front slowly lifts into the area late
thursday into friday. a low will develop along the front and
track across the southern great lakes friday night.


lhz363-230345-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
338 pm edt wed apr 22 2026

.tonight...light and variable winds. waves 2 feet or less. 
.thursday...east winds 5 to 10 knots increasing to 10 to 15 knots
late in the afternoon. waves 2 feet or less. 
.thursday night...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 15 to 20 knots decreasing to 10 to
15 knots in the late evening and overnight. showers in the
evening...then showers likely after midnight. waves 3 to 5 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 late in the evening. 
.sunday...north winds 5 to 10 knots veering to the east by
midnight. 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 . waves
2 feet or less building to 8 to 12 feet. waves occasionally
around 15 feet. 


$$

fzus63 kdtx 221938
glflh 
expires:202604230345;;814396

open lake forecast for lake huron
national weather service detroit/pontiac mi
338 pm edt wed apr 22 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 cold front settled over lake erie offers a chance
for a few evening storms. high pressure holds over the region
thursday before a warm front slowly lifts into the area late
thursday into friday. a low will develop along the front and
track across the southern great lakes friday night.


lhz462>464-230345-
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-
338 pm edt wed apr 22 2026

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


$$

fzus63 kmkx 221921
glflm 
expires:202604230415;;813963

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
221 pm cdt wed apr 22 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...

high pressure will shift from the northern great lakes to the
lower great lakes into this evening. light northerly winds are 
expected with areas of fog over far southern lake michigan. 

winds veer southeast and accelerate late tonight through friday 
morning as 29.2 inch low pressure develops over the northern great
plains and slowly tracks eastward. some 30 kt easterly winds may 
occur over the northern tip of the lake thursday night and friday. 

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 thursday night
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. 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 or northwest winds 
behind it (into tuesday). not seeing widespread gale potential 
with this system, though trends will be monitored.



lmz080-669-671-673-675-777-779-870-872-874-876-878-230415-
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-
221 pm cdt wed apr 22 2026

sheboygan wi to pentwater mi south...

.tonight...north winds 5 to 10 kt veering to south. patchy fog.
waves 1 to 2 ft. 
.thursday...southeast winds 10 to 15 kt increasing to 10 to
20 kt. patchy fog. waves 2 to 4 ft. 
.thursday night...southeast winds 10 to 20 kt becoming south.
waves 4 to 6 ft occasionally to 8 ft. 
.friday...south winds 15 to 25 kt becoming southwest 10 to 20 kt.
rain showers likely in the morning, then rain showers in the
afternoon. waves 4 to 6 ft occasionally to 8 ft. 
.friday night...west winds 10 to 15 kt becoming northwest 10 to
20 kt. rain showers in the evening. waves 3 to 5 ft. 
.saturday...north winds 10 to 20 kt. waves 2 to 4 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 2 ft. 
.monday...southeast winds to 30 kt. rain showers likely with a
chance of thunderstorms. waves 8 to 11 ft occasionally to 14 ft. 

$$

fzus63 kmkx 221921
glflm 
expires:202604230415;;813962

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
221 pm cdt wed apr 22 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...

high pressure will shift from the northern great lakes to the
lower great lakes into this evening. light northerly winds are 
expected with areas of fog over far southern lake michigan. 

winds veer southeast and accelerate late tonight through friday 
morning as 29.2 inch low pressure develops over the northern great
plains and slowly tracks eastward. some 30 kt easterly winds may 
occur over the northern tip of the lake thursday night and friday. 

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 thursday night
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. 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 or northwest winds 
behind it (into tuesday). not seeing widespread gale potential 
with this system, though trends will be monitored.



lmz261-362-364-366-563-565-567-868-230415-
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-
221 pm cdt wed apr 22 2026

sheboygan wi to pentwater mi north...

.tonight...northeast winds 5 to 10 kt veering to southeast 10 to
15 kt. waves 1 to 2 ft. 
.thursday...southeast winds 10 to 20 kt increasing to 15 to
25 kt. patchy fog in the afternoon. waves 2 to 4 ft. 
.thursday night...east to southeast winds to 30 kt. waves 4 to 7 
ft occasionally to 9 ft. 
.friday...east to southeast winds to 30 kt becoming southeast. 
chance of rain showers in the morning, then rain showers in the 
afternoon. waves 4 to 7 ft occasionally to 9 ft. 
.friday night...north 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 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 ft or less. 
.monday...southeast winds 15 to 25 kt increasing to 30 kt. chance
of rain showers. waves 7 to 10 ft occasionally to 13 ft building
to 8 to 11 ft occasionally to 14 ft.  

$$

fzus63 kmqt 222001
glfls 
expires:202604230800;;815141

open lake forecast for lake superior
national weather service marquette mi
400 pm edt wed apr 22 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...

30.0 inch high pressure remains over lake superior today. meanwhile, 
a 29.4 inch low over montana deepens to 29.1 inches by this evening 
before moving into southern manitoba by thursday evening. this sends 
29.6 in troughing over lake superior thursday night into friday. as 
the parent low weakens to 29.9 inches saturday and remnant troughing 
moves south of the lower great lakes at 29.7 inches, 30.0 inch 
ridging will build over lake superior. by late sunday, this ridge 
builds to 30.1 inches. meanwhile, a 29.3 inch colorado low develops, 
moving towards the upper midwest by early monday, causing pressure 
over lake superior to begin to fall rapidly toward 29.5 by mid-
monday.



lsz266-230800-
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-
400 pm edt wed apr 22 2026

.late this afternoon...east winds 5 to 15 knots. waves calm to
2 feet. 
.tonight...east winds 10 to 20 knots veering southeast after
midnight, then increasing to 15 to 25 knots late. waves building
to 2 to 4 feet. 
.thursday...southeast winds 20 to 30 knots. waves building to
6 to 9 feet occasionally to 11 feet. 
.thursday night...southeast winds to 30 knots with a few gale
force gusts to 35 knots possible. 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. a chance of rain showers
through early afternoon. a slight chance of thunderstorms. rain
showers by mid afternoon. waves building to 9 to 12 feet
occasionally to 15 feet, then subsiding to 5 to 8 feet
occasionally to 10 feet. 
.friday night...southeast winds 15 to 25 knots becoming west
10 to 20 knots after midnight. a chance of rain showers. waves
subsiding to 2 to 4 feet. 
.saturday...west winds 10 to 20 knots veering northwest by mid
afternoon. waves subsiding to calm to 2 feet. 
.saturday night...north winds 5 to 15 knots veering southeast
after midnight. waves calm to 2 feet. 
.sunday...east winds 5 to 15 knots becoming southeast 10 to
20 knots. waves building to 1 to 3 feet. 
.monday...southeast gales to 35 knots. a chance of rain showers.
waves building to 5 to 9 feet occasionally to 11 feet. 

$$

fzus63 kmqt 222001
glfls 
expires:202604230800;;815142

open lake forecast for lake superior
national weather service marquette mi
400 pm edt wed apr 22 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...

30.0 inch high pressure remains over lake superior today. meanwhile, 
a 29.4 inch low over montana deepens to 29.1 inches by this evening 
before moving into southern manitoba by thursday evening. this sends 
29.6 in troughing over lake superior thursday night into friday. as 
the parent low weakens to 29.9 inches saturday and remnant troughing 
moves south of the lower great lakes at 29.7 inches, 30.0 inch 
ridging will build over lake superior. by late sunday, this ridge 
builds to 30.1 inches. meanwhile, a 29.3 inch colorado low develops, 
moving towards the upper midwest by early monday, causing pressure 
over lake superior to begin to fall rapidly toward 29.5 by mid-
monday.



lsz267-230800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
400 pm edt wed apr 22 2026

.late this afternoon...east winds 5 to 15 knots. waves calm to
2 feet. 
.tonight...east winds 5 to 15 knots becoming southeast 10 to
20 knots late. waves building to 1 to 3 feet. 
.thursday...southeast winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon. waves building to 4 to 7 feet
occasionally to 9 feet. 
.thursday night...southeast winds 20 to 30 knots increasing to
30 knots with a few gale force gusts to 40 knots possible after
midnight. waves building to 6 to 9 feet occasionally to 11 feet. 
.friday...southeast gales to 35 knots. a slight chance of rain
showers through early afternoon, then rain showers likely and a
slight chance of thunderstorms by mid afternoon. waves subsiding
to 3 to 6 feet occasionally to 8 feet. 
.friday night...southeast winds 20 to 30 knots diminishing to
15 to 25 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 chance of rain showers.
waves building to 2 to 4 feet, then subsiding to calm to 2 feet. 
.saturday night...northwest winds 5 to 15 knots veering north
after midnight. waves calm to 2 feet. 
.sunday...east winds 5 to 15 knots veering southeast. waves calm
to 2 feet. 
.monday...southeast gales to 35 knots. a chance of rain showers.
waves building to 5 to 9 feet occasionally to 11 feet. 

$$

fzus63 kmqt 222001
glfls 
expires:202604230800;;815137

open lake forecast for lake superior
national weather service marquette mi
400 pm edt wed apr 22 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...

30.0 inch high pressure remains over lake superior today. meanwhile, 
a 29.4 inch low over montana deepens to 29.1 inches by this evening 
before moving into southern manitoba by thursday evening. this sends 
29.6 in troughing over lake superior thursday night into friday. as 
the parent low weakens to 29.9 inches saturday and remnant troughing 
moves south of the lower great lakes at 29.7 inches, 30.0 inch 
ridging will build over lake superior. by late sunday, this ridge 
builds to 30.1 inches. meanwhile, a 29.3 inch colorado low develops, 
moving towards the upper midwest by early monday, causing pressure 
over lake superior to begin to fall rapidly toward 29.5 by mid-
monday.



lsz162-230800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 pm edt wed apr 22 2026 /300 pm cdt wed apr 22 2026/

.late this afternoon...northeast winds 10 to 20 knots. waves calm
to 2 feet building to 1 to 3 feet. 
.tonight...northeast winds 10 to 20 knots veering east late. a
chance of rain showers and a slight chance of thunderstorms.
waves building to 3 to 5 feet occasionally to 7 feet, then
subsiding to 2 to 4 feet. 
.thursday...east winds 10 to 20 knots becoming northeast 15 to
25 knots late. rain showers likely and a slight chance of
thunderstorms by mid afternoon. waves building to 3 to 6 feet
occasionally to 8 feet. 
.thursday night...northeast winds 10 to 20 knots veering east
after midnight, then backing northeast late. rain showers and a
chance of thunderstorms. waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet. 
.friday...west winds 10 to 20 knots. rain showers likely through
early afternoon, then a chance of rain showers by mid afternoon.
waves subsiding to 2 to 4 feet. 
.friday night...northwest winds 10 to 20 knots backing west after
midnight. waves subsiding to calm to 2 feet. 
.saturday...west winds 10 to 20 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 2 to 4 feet. 
.monday...northeast winds 15 to 25 knots becoming north 20 to
30 knots. a chance of rain showers. waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet. 

$$

fzus63 kmqt 222001
glfls 
expires:202604230800;;815138

open lake forecast for lake superior
national weather service marquette mi
400 pm edt wed apr 22 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...

30.0 inch high pressure remains over lake superior today. meanwhile, 
a 29.4 inch low over montana deepens to 29.1 inches by this evening 
before moving into southern manitoba by thursday evening. this sends 
29.6 in troughing over lake superior thursday night into friday. as 
the parent low weakens to 29.9 inches saturday and remnant troughing 
moves south of the lower great lakes at 29.7 inches, 30.0 inch 
ridging will build over lake superior. by late sunday, this ridge 
builds to 30.1 inches. meanwhile, a 29.3 inch colorado low develops, 
moving towards the upper midwest by early monday, causing pressure 
over lake superior to begin to fall rapidly toward 29.5 by mid-
monday.



lsz263-230800-
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-
400 pm edt wed apr 22 2026

.late this afternoon...east winds 10 to 20 knots. waves calm to
2 feet building to 1 to 3 feet. 
.tonight...east winds 10 to 20 knots increasing to 15 to 25 knots
late. a chance of rain showers. a slight chance of thunderstorms
after midnight. waves building to 3 to 5 feet occasionally to
7 feet, then subsiding to 2 to 4 feet. 
.thursday...east winds 15 to 25 knots increasing to 20 to
30 knots late. a slight chance of showers and thunderstorms by
mid afternoon. waves building to 6 to 9 feet occasionally to
11 feet. 
.thursday night...southeast winds to 30 knots with a few gale
force gusts to 35 knots possible becoming east 20 to 30 knots
after midnight. rain showers and a chance of thunderstorms. waves
building to 8 to 11 feet occasionally to 14 feet. 
.friday...east winds 20 to 30 knots becoming west 15 to 25 knots
by mid afternoon. rain showers likely 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 10 to 20 knots becoming west 5 to
15 knots after midnight. a 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...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. waves building to 1 to
3 feet. 
.monday...east winds 15 to 25 knots backing north. a chance of
rain showers. waves building to 5 to 8 feet occasionally to
10 feet, then subsiding to 3 to 6 feet occasionally to 8 feet. 

$$

fzus63 kmqt 222001
glfls 
expires:202604230800;;815139

open lake forecast for lake superior
national weather service marquette mi
400 pm edt wed apr 22 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...

30.0 inch high pressure remains over lake superior today. meanwhile, 
a 29.4 inch low over montana deepens to 29.1 inches by this evening 
before moving into southern manitoba by thursday evening. this sends 
29.6 in troughing over lake superior thursday night into friday. as 
the parent low weakens to 29.9 inches saturday and remnant troughing 
moves south of the lower great lakes at 29.7 inches, 30.0 inch 
ridging will build over lake superior. by late sunday, this ridge 
builds to 30.1 inches. meanwhile, a 29.3 inch colorado low develops, 
moving towards the upper midwest by early monday, causing pressure 
over lake superior to begin to fall rapidly toward 29.5 by mid-
monday.



lsz264-230800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
400 pm edt wed apr 22 2026

.late this afternoon...east winds 5 to 15 knots. waves calm to
2 feet. 
.tonight...east winds 10 to 20 knots veering southeast after
midnight, then becoming east 15 to 25 knots late. a slight chance
of rain showers after midnight. waves building to 3 to 5 feet
occasionally to 7 feet. 
.thursday...east winds 15 to 25 knots becoming southeast 20 to
30 knots in the afternoon. waves building to 7 to 10 feet
occasionally to 13 feet. 
.thursday night...southeast winds to 30 knots with a few gale
force gusts to 35 knots possible. a chance of rain showers
through midnight. a chance of thunderstorms. rain showers likely
after midnight. waves building to 9 to 12 feet occasionally to
15 feet. 
.friday...southeast gales to 35 knots diminishing to 20 to
30 knots by mid afternoon. rain showers and a slight chance of
thunderstorms. waves subsiding to 5 to 8 feet occasionally to
10 feet. 
.friday night...west winds 10 to 20 knots becoming northwest 5 to
15 knots after midnight. a chance of rain showers. waves
subsiding to 2 to 4 feet. 
.saturday...west winds 5 to 15 knots. waves subsiding to calm to
2 feet. 
.saturday night...southwest winds less than 10 knots backing
southeast 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 veering southeast. a chance
of rain showers. waves building to 5 to 9 feet occasionally to
11 feet. 

$$

fzus63 kmqt 222001
glfls 
expires:202604230800;;815140

open lake forecast for lake superior
national weather service marquette mi
400 pm edt wed apr 22 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...

30.0 inch high pressure remains over lake superior today. meanwhile, 
a 29.4 inch low over montana deepens to 29.1 inches by this evening 
before moving into southern manitoba by thursday evening. this sends 
29.6 in troughing over lake superior thursday night into friday. as 
the parent low weakens to 29.9 inches saturday and remnant troughing 
moves south of the lower great lakes at 29.7 inches, 30.0 inch 
ridging will build over lake superior. by late sunday, this ridge 
builds to 30.1 inches. meanwhile, a 29.3 inch colorado low develops, 
moving towards the upper midwest by early monday, causing pressure 
over lake superior to begin to fall rapidly toward 29.5 by mid-
monday.



lsz265-230800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
400 pm edt wed apr 22 2026

.late this afternoon...east winds 15 to 25 knots. waves calm to
2 feet. 
.tonight...east winds 15 to 25 knots veering southeast after
midnight. a slight chance of rain showers after midnight. waves
building to 2 to 4 feet. 
.thursday...southeast winds 20 to 30 knots increasing to 30 knots
with a few gale force gusts to 35 knots possible late. waves
building to 5 to 8 feet occasionally to 10 feet. 
.thursday night...southeast winds to 30 knots with a few gale
force gusts to 35 knots possible. a chance of showers and
thunderstorms. waves building to 6 to 9 feet occasionally to
11 feet. 
.friday...southeast gales to 35 knots diminishing to 20 to
30 knots by mid afternoon. rain showers and a slight chance of
thunderstorms. waves subsiding to 4 to 7 feet occasionally to
9 feet. 
.friday night...west winds 10 to 20 knots. a chance of rain
showers. waves subsiding to 1 to 3 feet. 
.saturday...west winds 10 to 20 knots veering northwest by mid
afternoon. waves subsiding to calm to 2 feet. 
.saturday night...southeast winds 5 to 15 knots. waves calm to
2 feet. 
.sunday...east winds 5 to 15 knots becoming southeast 10 to
20 knots. waves building to 1 to 3 feet. 
.monday...east winds 20 to 30 knots becoming west gales to
35 knots. a chance of rain showers. waves building to 5 to 8 feet
occasionally to 10 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet. 

$$