fzus63 kdtx 212057
glflh 
expires:202602220500;;031218

open lake forecast for lake huron
national weather service detroit/pontiac mi
357 pm est sat feb 21 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 stalled over lake huron continues to
weaken through the day, with current central pressure currently
around 29.80 inches. light winds and lake effect snow expected
through the weekend, with winds ramping up sunday night into
monday as the low eases into ontario.


lhz361-220500-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
357 pm est sat feb 21 2026

.tonight...northeast winds 5 to 10 knots. snow in the evening...
then a chance of snow after midnight. waves 2 feet or less. 
.sunday...north winds 10 to 15 knots. a chance of snow. waves
1 to 3 feet. 
.sunday night...north winds 15 to 20 knots increasing to 20 to
25 knots in the late evening and overnight. freezing spray after
midnight. waves 5 to 7 feet. waves occasionally around 10 feet. 
.monday...north winds 20 to 25 knots decreasing to 15 to 20 knots
in the late morning and afternoon. freezing spray in the morning.
waves 5 to 7 feet. waves occasionally around 10 feet. 
.monday night...northwest winds 15 to 20 knots becoming north
5 to 10 knots. waves 4 to 6 feet subsiding to 1 to 3 feet after
midnight. waves occasionally around 8 feet. 
.tuesday...northeast winds 5 to 10 knots becoming southeast 10 to
15 knots late in the morning...then increasing to 15 to 20 knots
late in the afternoon increasing to 20 to 25 knots late in the
evening. a chance of snow. freezing spray late in the afternoon.
waves 1 to 3 feet building to 6 to 9 feet late in the afternoon.
waves occasionally around 12 feet. 
.wednesday...east winds 15 to 20 knots backing to the northeast
in the late morning and early afternoon...then backing to the
northwest . freezing spray early in the morning. a chance of snow
early in the morning. a chance of snow by midnight. waves 6 to
9 feet subsiding to 4 to 6 feet . waves occasionally around
12 feet. 
.thursday...west winds 15 to 20 knots decreasing to 10 to
15 knots . a chance of snow early in the morning. waves 3 to
5 feet subsiding to 2 to 4 feet by midnight. 


$$

fzus63 kdtx 212057
glflh 
expires:202602220500;;031219

open lake forecast for lake huron
national weather service detroit/pontiac mi
357 pm est sat feb 21 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 stalled over lake huron continues to
weaken through the day, with current central pressure currently
around 29.80 inches. light winds and lake effect snow expected
through the weekend, with winds ramping up sunday night into
monday as the low eases into ontario.


lhz362-363-220500-
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-
357 pm est sat feb 21 2026

.tonight...north winds 5 to 10 knots increasing to 10 to 15 knots
early in the morning. snow likely in the evening...then a chance
of snow after midnight. waves 2 to 4 feet subsiding to 1 to
3 feet in the late evening and overnight. 
.sunday...north winds 10 to 15 knots increasing to 15 to 20 knots
late in the afternoon. a chance of snow. waves 2 to 4 feet
building to 3 to 5 feet in the late morning and afternoon. 
.sunday night...north winds 15 to 20 knots increasing to
30 knots. a chance of snow. freezing spray after midnight. waves
6 to 9 feet building to 8 to 12 feet after midnight. waves
occasionally around 15 feet. 
.monday...north winds to 30 knots decreasing to 20 to 25 knots in
the late morning and afternoon. freezing spray. waves 8 to
12 feet. waves occasionally around 15 feet. 
.monday night...northwest winds 20 to 25 knots. freezing spray in
the evening. waves 6 to 9 feet. waves occasionally around
12 feet. 
.tuesday...north winds 5 to 10 knots becoming southeast 10 to
15 knots late in the morning...then increasing to 15 to 20 knots
late in the afternoon becoming south 20 to 25 knots late in the
evening. a chance of snow. freezing spray late in the afternoon.
waves 2 to 4 feet building to 6 to 9 feet late in the afternoon.
waves occasionally around 12 feet. 
.wednesday...southeast winds 15 to 20 knots veering to the west
until early evening...then increasing to 20 to 25 knots by
midnight. freezing spray early in the morning. freezing spray by
midnight. a chance of snow early in the morning. a chance of snow
by midnight. waves 6 to 9 feet. waves occasionally around
12 feet. 
.thursday...west winds 20 to 25 knots decreasing to 15 to
20 knots. a chance of snow until afternoon. freezing spray until
afternoon. waves 6 to 9 feet. waves occasionally around 12 feet. 

wave heights are for ice free areas.

$$

fzus63 kdtx 212057
glflh 
expires:202602220500;;031220

open lake forecast for lake huron
national weather service detroit/pontiac mi
357 pm est sat feb 21 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 stalled over lake huron continues to
weaken through the day, with current central pressure currently
around 29.80 inches. light winds and lake effect snow expected
through the weekend, with winds ramping up sunday night into
monday as the low eases into ontario.


lhz462>464-220500-
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-
357 pm est sat feb 21 2026

.tonight...west winds 5 to 10 knots. a chance of snow after
midnight. waves 2 feet or less. 
.sunday...northwest winds 5 to 10 knots increasing to 10 to
15 knots in the afternoon. a chance of snow. waves 1 to 3 feet. 
.sunday night...north winds 15 to 20 knots becoming northwest
20 to 25 knots with gusts to around 30 knots after midnight. a
chance of snow. freezing spray after midnight. waves 3 to 5 feet
building to 6 to 9 feet after midnight. waves occasionally around
12 feet. 
.monday...north winds to 30 knots decreasing to 20 to 25 knots
early in the afternoon. freezing spray. waves 10 to 14 feet. 
waves occasionally around 18 feet. 
.monday night...north winds 20 to 25 knots with gusts to around
30 knots decreasing to 10 to 15 knots. freezing spray in the
evening. waves 6 to 9 feet. waves occasionally around 12 feet. 
.tuesday...northwest winds 5 to 10 knots backing to the southwest
late in the morning...then becoming south 15 to 20 knots late in
the afternoon. a chance of snow late in the morning. snow likely
late in the afternoon. waves 3 to 5 feet building to 5 to 7 feet
late in the evening. waves occasionally around 10 feet. 
.wednesday...south winds 15 to 20 knots becoming west 10 to
15 knots until early evening...then increasing to 15 to 20 knots
by midnight. a chance of snow early in the morning...then a
chance of snow and rain. waves 4 to 6 feet subsiding to 2 to
4 feet . waves occasionally around 8 feet. 
.thursday...west winds 15 to 20 knots decreasing to 10 to
15 knots . a chance of rain until afternoon. a chance of snow.
waves 3 to 5 feet subsiding to 1 to 3 feet by midnight. 

wave heights are for ice free areas.

$$

fzus63 kmkx 212007
glflm 
expires:202602220430;;029728

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
207 pm cst sat feb 21 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...

northwesterly winds will continue throughout this afternoon and
tonight, with gusty conditions developing after midnight cst
tonight as low pressure deepens off the mid-atlantic coast and 
strong canadian high pressure builds to around 31.2 inches. as 
high pressure builds eastward into ontario sunday night, expect 
gales to develop across the southern two-thirds of the open 
waters. a gale watch is in effect sunday night into monday midday.
moderate freezing spray is also expected, with some heavy freezing
spray possible in the central third. winds will gradually 
diminish into monday as low pressure lifts into the canadian 
maritimes and high pressure around 30.4 inches builds over the 
western great lakes region. a modest south breeze develops tuesday
as high pressure continues eastward and weak low pressure 
progresses eastward through the northern great lakes. a cold front
from this low will turn winds northwesterly again tuesday night 
into wednesday morning.


lmz366-565-567-868-220430-
lake michigan from point betsie to manistee mi 5 nm offshore to
mid lake-
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-
207 pm cst sat feb 21 2026

sturgeon bay wi to point betsie mi south to sheboygan wi to
pentwater mi...

...gale watch in effect from sunday evening through monday
morning...

.tonight...northwest winds 10 to 20 kt increasing to 15 to 25 kt.
chance of snow showers. waves 2 to 4 ft building to 4 to 7 ft
occasionally to 9 ft. 
.sunday...northwest winds to 30 kt becoming north. freezing spray
in the morning. chance of snow showers. waves 8 to 11 ft
occasionally to 14 ft building to 8 to 12 ft occasionally to
16 ft. 
.sunday night...north gales to 35 kt. freezing spray. waves 10 to
14 ft occasionally to 18 ft. 
.monday...north gales to 35 kt diminishing to 30 kt. freezing
spray. waves 10 to 14 ft occasionally to 18 ft subsiding to 8 to
12 ft occasionally to 16 ft. 
.monday night...north winds 15 to 25 kt backing to west 10 to
15 kt overnight. waves 5 to 8 ft occasionally to 10 ft subsiding
to 2 to 4 ft. 
.tuesday...south winds 10 to 20 kt becoming southwest 15 to
25 kt. chance of snow in the morning, then snow likely in the
afternoon. waves 3 to 5 ft building to 5 to 8 ft occasionally to
10 ft. 
.tuesday night...southwest winds 15 to 25 kt becoming northwest.
chance of snow. waves 5 to 8 ft occasionally to 10 ft. 
.wednesday...northwest winds 15 to 25 kt becoming west 10 to
20 kt. waves 5 to 8 ft occasionally to 10 ft. 
.thursday...northwest winds 15 to 25 kt becoming west 10 to
20 kt. chance of snow. waves 6 to 9 ft occasionally to 12 ft
subsiding to 4 to 7 ft occasionally to 9 ft.  

$$

fzus63 kmkx 212007
glflm 
expires:202602220430;;029729

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
207 pm cst sat feb 21 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...

northwesterly winds will continue throughout this afternoon and
tonight, with gusty conditions developing after midnight cst
tonight as low pressure deepens off the mid-atlantic coast and 
strong canadian high pressure builds to around 31.2 inches. as 
high pressure builds eastward into ontario sunday night, expect 
gales to develop across the southern two-thirds of the open 
waters. a gale watch is in effect sunday night into monday midday.
moderate freezing spray is also expected, with some heavy freezing
spray possible in the central third. winds will gradually 
diminish into monday as low pressure lifts into the canadian 
maritimes and high pressure around 30.4 inches builds over the 
western great lakes region. a modest south breeze develops tuesday
as high pressure continues eastward and weak low pressure 
progresses eastward through the northern great lakes. a cold front
from this low will turn winds northwesterly again tuesday night 
into wednesday morning.


lmz080-669-671-673-675-777-779-870-872-874-876-878-220430-
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-
207 pm cst sat feb 21 2026

sheboygan wi to pentwater mi south...

...gale watch in effect from sunday evening through monday
morning...

.tonight...northwest winds 10 to 20 kt increasing to 15 to 25 kt.
chance of snow showers. waves 2 to 4 ft building to 5 to 8 ft
occasionally to 10 ft. 
.sunday...northwest winds to 30 kt. freezing spray in the
morning. chance of snow showers. waves 7 to 10 ft occasionally to
13 ft building to 10 to 14 ft occasionally to 18 ft. 
.sunday night...northwest gales to 35 kt becoming north. freezing
spray. chance of snow showers. waves 12 to 16 ft occasionally to
21 ft. 
.monday...north gales to 35 kt diminishing to 30 kt. chance of
snow showers in the morning. freezing spray. waves 12 to 16 ft
occasionally to 21 ft. 
.monday night...north winds 15 to 25 kt becoming west 10 to 15 kt
overnight. waves 8 to 11 ft occasionally to 14 ft subsiding to
4 to 6 ft occasionally to 8 ft. 
.tuesday...southwest winds 15 to 25 kt becoming south. chance of
snow. waves 3 to 5 ft building to 5 to 8 ft occasionally to
10 ft. 
.tuesday night...southwest winds 15 to 25 kt becoming west.
chance of snow. waves 6 to 9 ft occasionally to 12 ft. 
.wednesday...northwest winds 15 to 25 kt becoming west 10 to
20 kt. waves 6 to 9 ft occasionally to 12 ft. 
.thursday...northwest winds 15 to 25 kt diminishing to 10 to
20 kt. chance of snow. waves 8 to 11 ft occasionally to 14 ft
subsiding to 6 to 9 ft occasionally to 12 ft.  

$$

fzus63 kmkx 212007
glflm 
expires:202602220430;;029727

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
207 pm cst sat feb 21 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...

northwesterly winds will continue throughout this afternoon and
tonight, with gusty conditions developing after midnight cst
tonight as low pressure deepens off the mid-atlantic coast and 
strong canadian high pressure builds to around 31.2 inches. as 
high pressure builds eastward into ontario sunday night, expect 
gales to develop across the southern two-thirds of the open 
waters. a gale watch is in effect sunday night into monday midday.
moderate freezing spray is also expected, with some heavy freezing
spray possible in the central third. winds will gradually 
diminish into monday as low pressure lifts into the canadian 
maritimes and high pressure around 30.4 inches builds over the 
western great lakes region. a modest south breeze develops tuesday
as high pressure continues eastward and weak low pressure 
progresses eastward through the northern great lakes. a cold front
from this low will turn winds northwesterly again tuesday night 
into wednesday morning.


lmz261-362-364-563-220430-
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 rock island passage to sturgeon bay wi-
207 pm cst sat feb 21 2026

sturgeon bay wi to point betsie mi north...

.tonight...northwest winds 10 to 20 kt becoming north 15 to
25 kt. snow showers this evening, then snow showers likely
overnight. waves 1 to 3 ft building to 4 to 6 ft occasionally to
8 ft. 
.sunday...north winds 15 to 25 kt increasing to 30 kt. chance of
snow showers in the morning, then slight chance of snow showers
in the afternoon. freezing spray in the afternoon. waves 6 to
9 ft occasionally to 12 ft building to 7 to 10 ft occasionally to
13 ft. 
.sunday night...north gales to 35 kt. freezing spray. waves 8 to
11 ft occasionally to 14 ft. 
.monday...north gales to 35 kt diminishing to 30 kt. heavy
freezing spray in the morning, then freezing spray in the
afternoon. waves 8 to 11 ft occasionally to 14 ft subsiding to
5 to 8 ft occasionally to 10 ft. 
.monday night...north winds 10 to 20 kt becoming northeast 5 to
10 kt overnight. waves 4 to 6 ft occasionally to 8 ft subsiding
to 1 to 3 ft. 
.tuesday...south winds 10 to 20 kt. chance of snow in the
morning, then snow likely in the afternoon. waves 2 to 4 ft
building to 4 to 7 ft occasionally to 9 ft. 
.tuesday night...south winds 15 to 25 kt veering to west 10 to
20 kt. chance of snow. waves 5 to 8 ft occasionally to 10 ft. 
.wednesday...northwest winds 10 to 20 kt. waves 4 to 7 ft
occasionally to 9 ft subsiding to 4 to 6 ft occasionally to 8 ft.
.thursday...northwest winds 15 to 25 kt becoming west 10 to
20 kt. waves 4 to 7 ft occasionally to 9 ft subsiding to 2 to
4 ft.  

$$

fzus63 kmqt 212101
glfls 
expires:202602220900;;031547

open lake forecast for lake superior
national weather service marquette mi
400 pm est sat feb 21 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...

a 29.9 inch low over lake huron this afternoon gradually weakens to 
30.0 inches by tonight, remaining mostly stationary. meanwhile, 31.2 
inch high pressure builds over northern saskatchewan. through 
sunday, the low is gradually absorbed into a 28.9 inch nor'easter 
off the delmarva peninsula as high pressure slides over manitoba at 
31.0 inches, extending 30.7 inch ridging over western lake superior. 
the high weakens slightly to 30.7 inches over northern ontario by 
monday afternoon before sharply weakening to 30.2 inches over the 
ontario/quebec line tuesday morning. meanwhile, broad 29.8 inch low 
pressure forms over the plains, sending at least one low of around 
29.5 inches through the great lakes basin during the midweek period. 
weak ridging then builds over lake superior at around 29.9 inches 
for thursday before the next clipper low approaches lake superior 
from the nw for friday.



lsz267-220900-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
400 pm est sat feb 21 2026

...heavy freezing spray warning in effect from sunday afternoon
through late sunday night...

.late this afternoon...north winds 5 to 15 knots. a slight chance
of snow showers. waves calm to 2 feet. 
.tonight...north winds 10 to 20 knots. a slight chance of snow
showers. waves building to 2 to 4 feet. 
.sunday...north winds 15 to 25 knots increasing to 20 to 30 knots
by mid afternoon. a slight chance of snow showers in the morning.
freezing spray in the afternoon. waves building to 5 to 8 feet
occasionally to 10 feet. 
.sunday night...north winds to 30 knots with a few gale force
gusts to 35 knots possible. heavy freezing spray. a slight chance
of snow showers. waves building to 5 to 9 feet occasionally to
11 feet. 
.monday...north winds 20 to 30 knots diminishing to 15 to
25 knots in the afternoon. heavy freezing spray in the morning. a
slight chance of snow showers in the morning. waves subsiding to
2 to 4 feet. 
.monday night...northeast winds 10 to 20 knots veering east after
midnight. waves subsiding to calm to 2 feet, then building to
1 to 3 feet. 
.tuesday...southeast winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon. a chance of snow showers. waves
building to 4 to 7 feet occasionally to 9 feet. 
.tuesday night...southeast gales to 35 knots diminishing to 20 to
30 knots after midnight. freezing spray. snow showers likely in
the evening. a chance of snow showers after midnight. waves
building to 4 to 8 feet occasionally to 10 feet. 
.wednesday...northwest winds 15 to 25 knots veering north.
freezing spray. a chance of snow showers. waves building to 5 to
8 feet occasionally to 10 feet. 
.thursday...west winds 15 to 25 knots backing southwest. freezing
spray. waves subsiding to 2 to 4 feet, then building to 3 to
6 feet occasionally to 8 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 212101
glfls 
expires:202602220900;;031542

open lake forecast for lake superior
national weather service marquette mi
400 pm est sat feb 21 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...

a 29.9 inch low over lake huron this afternoon gradually weakens to 
30.0 inches by tonight, remaining mostly stationary. meanwhile, 31.2 
inch high pressure builds over northern saskatchewan. through 
sunday, the low is gradually absorbed into a 28.9 inch nor'easter 
off the delmarva peninsula as high pressure slides over manitoba at 
31.0 inches, extending 30.7 inch ridging over western lake superior. 
the high weakens slightly to 30.7 inches over northern ontario by 
monday afternoon before sharply weakening to 30.2 inches over the 
ontario/quebec line tuesday morning. meanwhile, broad 29.8 inch low 
pressure forms over the plains, sending at least one low of around 
29.5 inches through the great lakes basin during the midweek period. 
weak ridging then builds over lake superior at around 29.9 inches 
for thursday before the next clipper low approaches lake superior 
from the nw for friday.



lsz162-220900-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 pm est sat feb 21 2026 /300 pm cst sat feb 21 2026/

.late this afternoon...northwest winds 15 to 25 knots. waves 1 to
3 feet. 
.tonight...northwest winds 15 to 25 knots veering north by
midnight, then increasing to 20 to 30 knots late. a slight chance
of snow showers. waves building to 3 to 5 feet occasionally to
7 feet, then subsiding to 2 to 4 feet. 
.sunday...north winds 20 to 30 knots. a slight chance of snow
showers. waves building to 3 to 6 feet occasionally to 8 feet. 
.sunday night...north winds 20 to 30 knots diminishing to 10 to
20 knots. a chance of snow showers. waves subsiding to 2 to
4 feet. 
.monday...northeast winds 10 to 20 knots becoming east 5 to
15 knots in the afternoon. a slight chance of snow showers in the
morning. waves subsiding to calm to 2 feet. 
.monday night...southeast winds 5 to 15 knots becoming south
15 to 25 knots after midnight. a chance of snow showers. waves
building to 1 to 3 feet. 
.tuesday...south winds 10 to 20 knots veering southwest in the
afternoon. snow showers likely in the morning, then a chance of
snow showers in the afternoon. waves building to 2 to 4 feet,
then subsiding to calm to 2 feet. 
.tuesday night...northwest winds 10 to 20 knots increasing to
15 to 25 knots after midnight. waves calm to 2 feet. 
.wednesday...northwest winds 10 to 20 knots. waves building to
1 to 3 feet, then subsiding to calm to 2 feet. 
.thursday...southwest winds 10 to 20 knots. waves building to
1 to 3 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 212101
glfls 
expires:202602220900;;031543

open lake forecast for lake superior
national weather service marquette mi
400 pm est sat feb 21 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...

a 29.9 inch low over lake huron this afternoon gradually weakens to 
30.0 inches by tonight, remaining mostly stationary. meanwhile, 31.2 
inch high pressure builds over northern saskatchewan. through 
sunday, the low is gradually absorbed into a 28.9 inch nor'easter 
off the delmarva peninsula as high pressure slides over manitoba at 
31.0 inches, extending 30.7 inch ridging over western lake superior. 
the high weakens slightly to 30.7 inches over northern ontario by 
monday afternoon before sharply weakening to 30.2 inches over the 
ontario/quebec line tuesday morning. meanwhile, broad 29.8 inch low 
pressure forms over the plains, sending at least one low of around 
29.5 inches through the great lakes basin during the midweek period. 
weak ridging then builds over lake superior at around 29.9 inches 
for thursday before the next clipper low approaches lake superior 
from the nw for friday.



lsz263-220900-
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 est sat feb 21 2026

...heavy freezing spray warning in effect from sunday morning
through late sunday night...

.late this afternoon...northwest winds 10 to 20 knots. a chance
of snow showers. waves 1 to 3 feet. 
.tonight...north winds 15 to 25 knots. a chance of snow showers.
waves building to 4 to 7 feet occasionally to 9 feet. 
.sunday...north winds 20 to 30 knots. heavy freezing spray. a
chance of snow showers. waves building to 5 to 8 feet
occasionally to 10 feet. 
.sunday night...north winds to 30 knots with a few gale force
gusts to 35 knots possible diminishing to 20 to 30 knots late.
heavy freezing spray. a slight chance of snow showers. waves
building to 7 to 10 feet occasionally to 13 feet, then subsiding
to 5 to 8 feet occasionally to 10 feet. 
.monday...north winds 15 to 25 knots becoming northeast 5 to
15 knots in the afternoon. a slight chance of snow showers in the
morning. waves subsiding to 1 to 3 feet. 
.monday night...east winds 5 to 15 knots becoming southeast 10 to
20 knots after midnight. a chance of snow showers after midnight.
waves subsiding to calm to 2 feet, then building to 2 to 4 feet. 
.tuesday...south winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon. snow showers likely in the morning,
then a chance of snow showers in the afternoon. waves 2 to
4 feet. 
.tuesday night...northwest winds 10 to 20 knots. waves building
to 4 to 7 feet occasionally to 9 feet, then subsiding to 3 to
6 feet occasionally to 8 feet. 
.wednesday...northwest winds 10 to 20 knots veering north. waves
subsiding to 1 to 3 feet, then building to 3 to 5 feet
occasionally to 7 feet. 
.thursday...southwest winds 10 to 20 knots increasing to 15 to
25 knots. waves subsiding to calm to 2 feet, then building to
3 to 6 feet occasionally to 8 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 212101
glfls 
expires:202602220900;;031544

open lake forecast for lake superior
national weather service marquette mi
400 pm est sat feb 21 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...

a 29.9 inch low over lake huron this afternoon gradually weakens to 
30.0 inches by tonight, remaining mostly stationary. meanwhile, 31.2 
inch high pressure builds over northern saskatchewan. through 
sunday, the low is gradually absorbed into a 28.9 inch nor'easter 
off the delmarva peninsula as high pressure slides over manitoba at 
31.0 inches, extending 30.7 inch ridging over western lake superior. 
the high weakens slightly to 30.7 inches over northern ontario by 
monday afternoon before sharply weakening to 30.2 inches over the 
ontario/quebec line tuesday morning. meanwhile, broad 29.8 inch low 
pressure forms over the plains, sending at least one low of around 
29.5 inches through the great lakes basin during the midweek period. 
weak ridging then builds over lake superior at around 29.9 inches 
for thursday before the next clipper low approaches lake superior 
from the nw for friday.



lsz264-220900-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
400 pm est sat feb 21 2026

...heavy freezing spray warning in effect from 1 am est sunday
through monday afternoon...
...gale warning in effect from sunday afternoon through late
sunday night...

.late this afternoon...north winds 10 to 20 knots. a chance of
snow showers. waves 2 to 4 feet. 
.tonight...north winds 15 to 25 knots increasing to 20 to
30 knots late. freezing spray. a chance of snow showers. waves
building to 5 to 8 feet occasionally to 10 feet. 
.sunday...north winds 20 to 30 knots increasing to gales to
35 knots by mid afternoon. heavy freezing spray. a chance of snow
showers. waves building to 7 to 10 feet occasionally to 13 feet. 
.sunday night...north gales to 35 knots diminishing to 20 to
30 knots late. heavy freezing spray. a chance of snow showers.
waves building to 8 to 11 feet occasionally to 14 feet, then
subsiding to 6 to 9 feet occasionally to 11 feet. 
.monday...north winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon. heavy freezing spray in the morning. a
chance of snow showers in the morning. waves subsiding to 1 to
3 feet. 
.monday night...east winds 5 to 15 knots becoming southeast 10 to
20 knots after midnight. waves subsiding to calm to 2 feet, then
building to 2 to 4 feet. 
.tuesday...south winds 15 to 25 knots. snow showers likely in the
morning, then a chance of snow showers in the afternoon. freezing
spray in the afternoon. waves building to 5 to 8 feet
occasionally to 10 feet. 
.tuesday night...southeast winds 10 to 20 knots becoming
northwest 15 to 25 knots after midnight. freezing spray. a chance
of snow showers. waves building to 5 to 9 feet occasionally to
11 feet. 
.wednesday...northwest winds 15 to 25 knots becoming north 10 to
20 knots. freezing spray. waves subsiding to 2 to 4 feet, then
building to 3 to 6 feet occasionally to 8 feet. 
.thursday...northwest winds 10 to 20 knots backing southwest.
waves subsiding to 1 to 3 feet, then building to 3 to 6 feet
occasionally to 8 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 212101
glfls 
expires:202602220900;;031545

open lake forecast for lake superior
national weather service marquette mi
400 pm est sat feb 21 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...

a 29.9 inch low over lake huron this afternoon gradually weakens to 
30.0 inches by tonight, remaining mostly stationary. meanwhile, 31.2 
inch high pressure builds over northern saskatchewan. through 
sunday, the low is gradually absorbed into a 28.9 inch nor'easter 
off the delmarva peninsula as high pressure slides over manitoba at 
31.0 inches, extending 30.7 inch ridging over western lake superior. 
the high weakens slightly to 30.7 inches over northern ontario by 
monday afternoon before sharply weakening to 30.2 inches over the 
ontario/quebec line tuesday morning. meanwhile, broad 29.8 inch low 
pressure forms over the plains, sending at least one low of around 
29.5 inches through the great lakes basin during the midweek period. 
weak ridging then builds over lake superior at around 29.9 inches 
for thursday before the next clipper low approaches lake superior 
from the nw for friday.



lsz265-220900-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
400 pm est sat feb 21 2026

...gale warning in effect from sunday afternoon through late
sunday night...
...heavy freezing spray warning in effect from sunday afternoon
through monday afternoon...

.late this afternoon...northwest winds 20 to 30 knots. snow
showers. waves 3 to 5 feet occasionally to 7 feet. 
.tonight...northwest winds 20 to 30 knots veering north by
midnight, then increasing to gales to 35 knots late. snow showers
likely in the evening, then a chance of snow showers after
midnight. freezing spray after midnight. waves building to 5 to
8 feet occasionally to 10 feet. 
.sunday...north gales to 35 knots. heavy freezing spray. a chance
of snow showers. waves building to 8 to 11 feet occasionally to
14 feet. 
.sunday night...north gales to 40 knots. heavy freezing spray. a
chance of snow showers. waves building to 8 to 12 feet
occasionally to 15 feet. 
.monday...north winds 20 to 30 knots diminishing to 10 to
20 knots in the afternoon. heavy freezing spray. a chance of snow
showers. waves subsiding to 3 to 5 feet occasionally to 7 feet. 
.monday night...north winds 10 to 20 knots veering south after
midnight. waves subsiding to calm to 2 feet, then building to
1 to 3 feet. 
.tuesday...south winds 20 to 30 knots diminishing to 15 to
25 knots in the afternoon. a chance of snow showers in the
morning, then snow showers likely in the afternoon. waves
building to 3 to 6 feet occasionally to 8 feet. 
.tuesday night...south winds 15 to 25 knots becoming west 20 to
30 knots after midnight. a chance of snow showers. waves
subsiding to 3 to 6 feet occasionally to 8 feet. 
.wednesday...northwest winds 20 to 30 knots diminishing to 15 to
25 knots. freezing spray. waves subsiding to 3 to 5 feet
occasionally to 7 feet, then building to 4 to 7 feet occasionally
to 9 feet. 
.thursday...west winds 15 to 25 knots becoming southwest 10 to
20 knots. freezing spray. waves subsiding to calm to 2 feet, then
building to 2 to 4 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 212101
glfls 
expires:202602220900;;031546

open lake forecast for lake superior
national weather service marquette mi
400 pm est sat feb 21 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...

a 29.9 inch low over lake huron this afternoon gradually weakens to 
30.0 inches by tonight, remaining mostly stationary. meanwhile, 31.2 
inch high pressure builds over northern saskatchewan. through 
sunday, the low is gradually absorbed into a 28.9 inch nor'easter 
off the delmarva peninsula as high pressure slides over manitoba at 
31.0 inches, extending 30.7 inch ridging over western lake superior. 
the high weakens slightly to 30.7 inches over northern ontario by 
monday afternoon before sharply weakening to 30.2 inches over the 
ontario/quebec line tuesday morning. meanwhile, broad 29.8 inch low 
pressure forms over the plains, sending at least one low of around 
29.5 inches through the great lakes basin during the midweek period. 
weak ridging then builds over lake superior at around 29.9 inches 
for thursday before the next clipper low approaches lake superior 
from the nw for friday.



lsz266-220900-
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 est sat feb 21 2026

...gale warning in effect from sunday afternoon through late
sunday night...
...heavy freezing spray warning in effect from sunday afternoon
through monday afternoon...

.late this afternoon...north winds 15 to 25 knots. a chance of
snow showers. waves 3 to 5 feet occasionally to 7 feet. 
.tonight...north winds 15 to 25 knots. a chance of snow showers.
freezing spray after midnight. waves building to 5 to 8 feet
occasionally to 10 feet. 
.sunday...north winds 20 to 30 knots increasing to gales to
35 knots. freezing spray. a chance of snow showers. waves
building to 8 to 11 feet occasionally to 14 feet. 
.sunday night...north gales to 40 knots. heavy freezing spray. a
chance of snow showers. waves building to 10 to 14 feet
occasionally to 18 feet, then subsiding to 8 to 11 feet
occasionally to 14 feet. 
.monday...north winds 20 to 30 knots diminishing to 15 to
25 knots in the afternoon. a chance of snow showers in the
morning. heavy freezing spray. waves subsiding to 3 to 5 feet
occasionally to 7 feet. 
.monday night...north winds 5 to 15 knots becoming southeast
15 to 25 knots after midnight. waves subsiding to 1 to 3 feet,
then building to 2 to 4 feet. 
.tuesday...south winds 20 to 30 knots backing southeast in the
afternoon. a chance of snow showers in the morning, then snow
showers likely in the afternoon. freezing spray in the afternoon.
waves building to 5 to 8 feet occasionally to 10 feet. 
.tuesday night...southeast winds 20 to 30 knots veering west
after midnight. freezing spray. a chance of snow showers. waves
building to 6 to 10 feet occasionally to 13 feet. 
.wednesday...northwest winds 20 to 30 knots diminishing to 15 to
25 knots. freezing spray. a chance of snow showers. waves
subsiding to 5 to 8 feet occasionally to 10 feet, then building
to 6 to 9 feet occasionally to 11 feet. 
.thursday...west winds 15 to 25 knots backing southwest. freezing
spray. waves subsiding to 2 to 4 feet, then building to 4 to
7 feet occasionally to 9 feet. 

note, wave height forecasts are for ice free areas.

$$