fzus63 kdtx 241941
glflh 
expires:202604250345;;457805

open lake forecast for lake huron
national weather service detroit/pontiac mi
341 pm edt fri apr 24 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...low pressure, 29.70 inches, develops along an
approaching cold front and tracks across the southern great lakes
tonight. this low will bring increased chances for storms this
afternoon into tonight. broad high pressure then extends into the
great lakes from the north late saturday through sunday.


lhz361-250345-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
341 pm edt fri apr 24 2026

.tonight...east winds 15 to 20 knots backing to the northeast
early in the morning. showers likely in the evening...then a
chance of showers after midnight. patchy fog. waves 5 to 7 feet.
waves occasionally around 10 feet. 
.saturday...east winds 10 to 15 knots decreasing to 5 to 10 knots
in the afternoon. waves 3 to 5 feet subsiding to 1 to 3 feet late
in the afternoon. 
.saturday night...light and variable winds becoming north 5 to
10 knots after midnight. waves 2 feet or less. 
.sunday...north winds 5 to 10 knots veering to the east in the
late morning and afternoon. waves 2 feet or less. 
.sunday night...east 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 late in the evening.
waves 1 to 3 feet building to 10 to 14 feet. waves occasionally
around 18 feet. 
.tuesday...southeast at 35 knot gales 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 becoming southwest 15 to
20 knots early in the evening becoming west 10 to 15 knots by
midnight. showers likely early in the morning...then a chance of
showers early in the evening. waves 14 to 18 feet subsiding to
4 to 6 feet. waves occasionally around 23 feet. a gale warning
may be needed. 
.wednesday...west winds 10 to 15 knots becoming northwest 5 to
10 knots by midnight. waves 2 to 4 feet subsiding to 1 to 3 feet
by midnight. 


$$

fzus63 kdtx 241941
glflh 
expires:202604250345;;457806

open lake forecast for lake huron
national weather service detroit/pontiac mi
341 pm edt fri apr 24 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...low pressure, 29.70 inches, develops along an
approaching cold front and tracks across the southern great lakes
tonight. this low will bring increased chances for storms this
afternoon into tonight. broad high pressure then extends into the
great lakes from the north late saturday through sunday.


lhz362-363-250345-
lake huron from presque isle light to sturgeon point mi beyond
5nm off shore-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
341 pm edt fri apr 24 2026

.tonight...east winds 15 to 20 knots becoming northeast 10 to
15 knots early in the morning. showers in the evening...then a
chance of showers after midnight. patchy fog after midnight.
waves 5 to 7 feet. waves occasionally around 10 feet. 
.saturday...northeast winds 10 to 15 knots. waves 3 to 5 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. 
.sunday night...northeast winds 5 to 10 knots veering to the east
after midnight. waves 2 feet or less. 
.monday...southeast winds 5 to 10 knots increasing to 30 knots
with gusts to 40 knot gales. a chance of showers late in the
evening. waves 2 feet or less building to 10 to 14 feet. waves
occasionally around 18 feet. 
.tuesday...southeast at 35 knot gales with gusts to 40 knot gales
becoming south 20 to 25 knots with gusts to 40 knot gales in the
late morning and early afternoon...then becoming southwest 15 to
20 knots early in the evening becoming west 10 to 15 knots by
midnight. a chance of showers early in the morning. waves 14 to
18 feet subsiding to 4 to 6 feet. waves occasionally around
23 feet. a gale warning may be needed. 
.wednesday...west winds 5 to 10 knots. waves 2 to 4 feet
subsiding to 1 to 3 feet. 


$$

fzus63 kdtx 241941
glflh 
expires:202604250345;;457807

open lake forecast for lake huron
national weather service detroit/pontiac mi
341 pm edt fri apr 24 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...low pressure, 29.70 inches, develops along an
approaching cold front and tracks across the southern great lakes
tonight. this low will bring increased chances for storms this
afternoon into tonight. broad high pressure then extends into the
great lakes from the north late saturday through sunday.


lhz462>464-250345-
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-
341 pm edt fri apr 24 2026

.tonight...southeast winds 10 to 15 knots. showers in the
evening...then a chance of showers after midnight. patchy fog
after midnight. waves 2 to 4 feet. 
.saturday...northeast winds 10 to 15 knots backing to the north
in the afternoon. 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 in the late evening and overnight. 
.sunday...northeast winds 5 to 10 knots. waves 1 to 3 feet. 
.sunday night...northeast winds 5 to 10 knots veering to the east
after midnight. waves 2 feet or less. 
.monday...southeast winds 5 to 10 knots increasing to 30 knots
with gusts to 40 knot gales. a chance of showers late in the
evening. waves 1 to 3 feet building to 8 to 12 feet. waves
occasionally around 15 feet. 
.tuesday...southeast at 35 knot gales with gusts to 40 knot gales
becoming south 20 to 25 knots with gusts to 40 knot gales in the
late morning and early afternoon...then becoming southwest 10 to
15 knots . a chance of showers early in the morning...then a
chance of thunderstorms in the late morning and early afternoon.
waves 10 to 14 feet subsiding to 2 to 4 feet. waves occasionally
around 18 feet. a gale warning may be needed. 
.wednesday...west winds 5 to 10 knots veering to the north .
waves 1 to 3 feet. 


$$

fzus63 kmkx 241953
glflm 
expires:202604250315;;458059

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
253 pm cdt fri apr 24 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 around 30.0 inches will build into northern 
wisconsin and the western u.p. tonight behind departing low 
pressure, resulting in northerly winds of 10-20 knots tonight into
saturday. areas of fog may linger into this evening until the 
cooler and drier airmass fully moves in behind the low. 

east to northeast winds 10 to 15 knots are expected to develop 
saturday night into sunday as the high shifts eastward ahead of an
approaching low pressure system. the 29.4 inch low is expected to
lift from around northwest minnesota early monday to lake 
superior by early tuesday morning. winds will increase monday into
monday night out of the south to southeast ahead of this low. the
cooler lake temps should dampen the threat for gales across the 
lake. breezy west to northwest winds will then develop behind the 
departing low on tuesday. 


lmz261-362-364-366-563-565-567-868-250315-
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-
253 pm cdt fri apr 24 2026

sheboygan wi to pentwater mi north...

.tonight...north winds 15 to 25 kt diminishing to 10 to 20 kt.
waves 2 to 4 ft. 
.saturday...north winds 10 to 20 kt becoming northeast. waves
3 to 5 ft. 
.saturday night...northeast winds 10 to 20 kt diminishing to 5 to
10 kt. waves 2 to 4 ft subsiding to 1 to 3 ft. 
.sunday...east winds 5 to 10 kt becoming northeast 10 to 15 kt.
waves 1 to 2 ft. 
.sunday night...east winds 10 to 15 kt becoming southeast 10 to
20 kt. waves 1 to 3 ft building to 2 to 4 ft. 
.monday...southeast winds 15 to 25 kt increasing to 30 kt. waves
4 to 6 ft occasionally to 8 ft building to 7 to 10 ft
occasionally to 13 ft. 
.monday night...southeast gales to 40 kt becoming south. rain
showers. waves 12 to 16 ft occasionally to 21 ft. 
.tuesday...southwest gales to 35 kt diminishing to 30 kt. chance
of rain showers. waves 10 to 14 ft occasionally to 18 ft
subsiding to 7 to 10 ft occasionally to 13 ft. 
.wednesday...northwest winds 10 to 20 kt becoming west. waves
1 to 3 ft.  

$$

fzus63 kmkx 241953
glflm 
expires:202604250315;;458060

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
253 pm cdt fri apr 24 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 around 30.0 inches will build into northern 
wisconsin and the western u.p. tonight behind departing low 
pressure, resulting in northerly winds of 10-20 knots tonight into
saturday. areas of fog may linger into this evening until the 
cooler and drier airmass fully moves in behind the low. 

east to northeast winds 10 to 15 knots are expected to develop 
saturday night into sunday as the high shifts eastward ahead of an
approaching low pressure system. the 29.4 inch low is expected to
lift from around northwest minnesota early monday to lake 
superior by early tuesday morning. winds will increase monday into
monday night out of the south to southeast ahead of this low. the
cooler lake temps should dampen the threat for gales across the 
lake. breezy west to northwest winds will then develop behind the 
departing low on tuesday. 


lmz080-669-671-673-675-777-779-870-872-874-876-878-250315-
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-
253 pm cdt fri apr 24 2026

sheboygan wi to pentwater mi south...

.tonight...northwest winds 10 to 20 kt becoming north. patchy fog
this evening. 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 northeast late
in the evening, then becoming east 10 to 15 kt after midnight
diminishing to 5 to 10 kt late. waves 3 to 5 ft subsiding to 2 to
4 ft. 
.sunday...east winds 5 to 10 kt becoming northeast 10 to 15 kt.
waves 1 to 3 ft. 
.sunday night...east winds 10 to 15 kt becoming southeast 10 to
20 kt. waves 1 to 3 ft building to 3 to 5 ft. 
.monday...southeast winds 15 to 25 kt increasing to 30 kt. waves
4 to 6 ft occasionally to 8 ft building to 7 to 10 ft
occasionally to 13 ft. 
.monday night...southeast gales to 40 kt becoming south. showers
with a chance of thunderstorms. waves 12 to 16 ft occasionally to
21 ft. 
.tuesday...southwest winds to 30 kt becoming west 15 to 25 kt.
waves 8 to 11 ft occasionally to 14 ft subsiding to 5 to 8 ft
occasionally to 10 ft. 
.wednesday...northwest winds 10 to 15 kt becoming north. waves
1 to 3 ft.  

$$

fzus63 kmqt 242001
glfls 
expires:202604250800;;458256

open lake forecast for lake superior
national weather service marquette mi
401 pm edt fri apr 24 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...

tonight into saturday, low pressure near lake winnipeg 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.



lsz162-250800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt fri apr 24 2026 /301 pm cdt fri apr 24 2026/

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

$$

fzus63 kmqt 242001
glfls 
expires:202604250800;;458257

open lake forecast for lake superior
national weather service marquette mi
401 pm edt fri apr 24 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...

tonight into saturday, low pressure near lake winnipeg 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.



lsz263-250800-
lake superior from saxon harbor wi to upper entrance to portage
canal mi 5nm off shore to the us/canadian border including isle
royale national park-
401 pm edt fri apr 24 2026

.late this afternoon...west winds 5 to 15 knots. waves 3 to
5 feet occasionally to 7 feet. 
.tonight...northwest winds 5 to 15 knots veering north after
midnight, then backing northwest late. patchy fog after midnight.
waves subsiding to calm to 2 feet. 
.saturday...north winds 5 to 15 knots veering east late. patchy
fog through early afternoon. waves calm to 2 feet. 
.saturday night...east winds 5 to 15 knots diminishing to less
than 10 knots late. 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. waves building to 1 to
3 feet, then subsiding to calm to 2 feet. 
.monday...east winds 15 to 25 knots increasing to 20 to 30 knots
by mid afternoon. a chance of rain showers. waves building to
6 to 9 feet occasionally to 11 feet. 
.monday night...east gales to 40 knots. rain showers. waves
building to 11 to 15 feet occasionally to 19 feet, then subsiding
to 10 to 14 feet occasionally to 18 feet. 
.tuesday...west gales to 35 knots. a chance of rain showers.
waves subsiding to 6 to 9 feet occasionally to 11 feet, then
building to 9 to 12 feet occasionally to 15 feet. 
.wednesday...west winds 10 to 20 knots diminishing to 5 to
15 knots. waves subsiding to calm to 2 feet. 

$$

fzus63 kmqt 242001
glfls 
expires:202604250800;;458258

open lake forecast for lake superior
national weather service marquette mi
401 pm edt fri apr 24 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...

tonight into saturday, low pressure near lake winnipeg 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.



lsz264-250800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
401 pm edt fri apr 24 2026

.late this afternoon...northwest winds 10 to 20 knots. waves 3 to
6 feet occasionally to 8 feet. 
.tonight...northwest winds 5 to 15 knots veering north after
midnight, then backing northwest late. patchy fog. waves
subsiding to calm to 2 feet. 
.saturday...northwest winds 5 to 15 knots diminishing to less
than 10 knots in the afternoon, then backing south late. patchy
fog through early afternoon. waves 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 winds 15 to 25 knots increasing to 20 to 30 knots
by mid afternoon. a chance of rain showers by mid afternoon.
waves building to 6 to 9 feet occasionally to 11 feet. 
.monday night...southeast gales to 45 knots. rain showers. waves
building to 12 to 17 feet occasionally to 21 feet, then subsiding
to 10 to 14 feet occasionally to 18 feet. 
.tuesday...west gales to 45 knots becoming northwest gales to
40 knots. a chance of rain showers. waves subsiding to 8 to
11 feet occasionally to 14 feet, then building to 9 to 12 feet
occasionally to 15 feet. 
.wednesday...west winds 15 to 25 knots becoming northwest 5 to
15 knots. waves subsiding to calm to 2 feet. 

$$

fzus63 kmqt 242001
glfls 
expires:202604250800;;458259

open lake forecast for lake superior
national weather service marquette mi
401 pm edt fri apr 24 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...

tonight into saturday, low pressure near lake winnipeg 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.



lsz265-250800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
401 pm edt fri apr 24 2026

.late this afternoon...west winds 10 to 20 knots. waves 2 to
4 feet. 
.tonight...west winds 10 to 20 knots veering northwest after
midnight. patchy fog after midnight. waves subsiding to calm to
2 feet. 
.saturday...northwest winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon, then veering east late. patchy fog
through early 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 building to 1 to 3 feet. 
.monday...southeast winds 15 to 25 knots becoming east gales to
40 knots by mid afternoon. a chance of rain showers by mid
afternoon. waves building to 7 to 10 feet occasionally to
13 feet. 
.monday night...southeast gales to 45 knots. rain showers. waves
building to 11 to 15 feet occasionally to 19 feet, then subsiding
to 10 to 14 feet occasionally to 18 feet. 
.tuesday...west gales to 45 knots. a chance of rain showers.
waves subsiding to 8 to 11 feet occasionally to 14 feet, then
building to 10 to 14 feet occasionally to 18 feet. 
.wednesday...west winds 20 to 30 knots diminishing to 10 to
20 knots. waves subsiding to calm to 2 feet. 

$$

fzus63 kmqt 242001
glfls 
expires:202604250800;;458260

open lake forecast for lake superior
national weather service marquette mi
401 pm edt fri apr 24 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...

tonight into saturday, low pressure near lake winnipeg 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.



lsz266-250800-
lake superior east of a line from manitou island to marquette mi
and west of a line from grand marais mi to the us/canadian border
beyond 5nm from shore-
401 pm edt fri apr 24 2026

.late this afternoon...west winds 15 to 25 knots. a slight chance
of rain showers. waves 3 to 6 feet occasionally to 8 feet. 
.tonight...northwest winds 10 to 20 knots. patchy fog. waves
subsiding to calm to 2 feet. 
.saturday...northwest winds 5 to 15 knots veering north late.
patchy fog through early 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 10 to 20 knots veering southeast after
midnight. waves building to 1 to 3 feet. 
.monday...southeast winds 15 to 25 knots becoming east gales to
35 knots by mid afternoon. waves building to 6 to 9 feet
occasionally to 11 feet. 
.monday night...southeast gales to 45 knots. rain showers. waves
building to 11 to 15 feet occasionally to 19 feet, then subsiding
to 10 to 14 feet occasionally to 18 feet. 
.tuesday...west storm force winds to 50 knots becoming northwest
gales to 40 knots. a chance of rain showers. waves subsiding to
9 to 12 feet occasionally to 15 feet, then building to 10 to
14 feet occasionally to 18 feet. 
.wednesday...northwest winds 20 to 30 knots diminishing to 15 to
25 knots. waves subsiding to 1 to 3 feet. 

$$

fzus63 kmqt 242001
glfls 
expires:202604250800;;458261

open lake forecast for lake superior
national weather service marquette mi
401 pm edt fri apr 24 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...

tonight into saturday, low pressure near lake winnipeg 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.



lsz267-250800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
401 pm edt fri apr 24 2026

.late this afternoon...southeast winds 15 to 25 knots. a chance
of rain showers. waves 3 to 5 feet occasionally to 7 feet
subsiding to 2 to 4 feet. 
.tonight...south winds 10 to 20 knots veering west after
midnight, then becoming south 5 to 15 knots late. a slight chance
of rain showers through midnight. patchy fog after midnight.
waves subsiding to calm to 2 feet. 
.saturday...southeast winds 5 to 15 knots backing north late.
patchy fog through early afternoon. waves calm to 2 feet. 
.saturday night...north winds 5 to 15 knots backing west after
midnight, then backing southeast late. 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 calm to 2 feet. 
.monday...southeast winds 10 to 20 knots increasing to gales to
35 knots by mid afternoon. waves building to 5 to 8 feet
occasionally to 10 feet. 
.monday night...southeast gales to 45 knots. a chance of rain
showers through midnight. rain showers after midnight. waves
building to 10 to 14 feet occasionally to 18 feet. 
.tuesday...west gales to 40 knots. rain showers likely. waves
subsiding to 7 to 10 feet occasionally to 13 feet, then building
to 10 to 14 feet occasionally to 18 feet. 
.wednesday...west winds 15 to 25 knots becoming northwest 10 to
20 knots. waves subsiding to 1 to 3 feet. 

$$