fzus63 kdtx 240144
glflh 
expires:202603240945;;195037

open lake forecast for lake huron
national weather service detroit/pontiac mi
944 pm edt mon mar 23 2026

for waters beyond five nautical miles off shore on lake huron

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...high pressure, 30.50 inches, briefly centers over
southern lower michigan tonight, but then gets forced out on
tuesday by an ontario low pressure system and its cold front. the
trough feature crosses the northern great lakes tuesday, clipping
the northern waters of lake huron which results in a few
additional light snow showers. a warm front lifts across the
great lakes region wednesday offering milder and wetter
conditions midweek.


lhz361-240945-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
944 pm edt mon mar 23 2026

.rest of tonight...west winds 5 to 10 knots backing to the south
after midnight...then becoming southwest 10 to 15 knots early in
the morning. waves 2 feet or less. 
.tuesday...southwest winds 15 to 20 knots becoming west 10 to
15 knots late in the afternoon. a chance of snow. waves 3 to
5 feet. 
.tuesday night...west winds 5 to 10 knots backing to the
southeast in the late evening and overnight. waves 2 to 4 feet
subsiding to 2 feet or less in the late evening and overnight. 
.wednesday...southeast winds 10 to 15 knots. a chance of snow and
rain. waves 2 to 4 feet. 
.wednesday night...southeast winds 5 to 10 knots increasing to
10 to 15 knots after midnight. waves 2 to 4 feet subsiding to
1 to 3 feet in the late evening and overnight. 
.thursday...southeast winds 10 to 15 knots veering to the
southwest late in the morning...then becoming northwest 15 to
20 knots late in the afternoon becoming north 20 to 25 knots late
in the evening. a chance of rain and snow late in the morning.
waves 1 to 3 feet building to 4 to 6 feet. waves occasionally
around 8 feet. 
.friday...north winds 15 to 20 knots becoming northwest 10 to
15 knots until early evening...then becoming west 15 to 20 knots
by midnight. waves 4 to 6 feet. waves occasionally around 8 feet.
.saturday...west winds 15 to 20 knots increasing to 20 to
25 knots until early evening...then becoming northwest 15 to
20 knots by midnight. waves 4 to 6 feet. 

wave heights are for ice free areas.

$$

fzus63 kdtx 240144
glflh 
expires:202603240945;;195038

open lake forecast for lake huron
national weather service detroit/pontiac mi
944 pm edt mon mar 23 2026

for waters beyond five nautical miles off shore on lake huron

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...high pressure, 30.50 inches, briefly centers over
southern lower michigan tonight, but then gets forced out on
tuesday by an ontario low pressure system and its cold front. the
trough feature crosses the northern great lakes tuesday, clipping
the northern waters of lake huron which results in a few
additional light snow showers. a warm front lifts across the
great lakes region wednesday offering milder and wetter
conditions midweek.


lhz362-363-240945-
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-
944 pm edt mon mar 23 2026

.rest of tonight...northwest winds 5 to 10 knots backing to the
southwest after midnight. waves 3 to 5 feet subsiding to 1 to
3 feet early in the morning. 
.tuesday...southwest winds 10 to 15 knots increasing to 15 to
20 knots in the late morning and early afternoon...then
decreasing to 10 to 15 knots late in the afternoon. waves 3 to
5 feet. 
.tuesday night...west winds 5 to 10 knots backing to the
southeast in the late evening and overnight. waves 3 to 5 feet
subsiding to 1 to 3 feet in the late evening and overnight. 
.wednesday...southeast winds 10 to 15 knots. a chance of snow in
the afternoon. waves 3 to 5 feet. 
.wednesday night...southeast winds 10 to 15 knots. waves 2 to
4 feet. 
.thursday...southeast winds 10 to 15 knots veering to the south
late in the morning...then becoming northwest 15 to 20 knots late
in the afternoon becoming north 20 to 25 knots with gusts to
around 30 knots late in the evening. a chance of rain. waves 2 to
4 feet building to 8 to 12 feet. waves occasionally around
15 feet. 
.friday...north winds 20 to 25 knots with gusts to around
30 knots decreasing to 15 to 20 knots in the late morning and
early afternoon...then backing to the northwest . waves 8 to
12 feet subsiding to 5 to 7 feet . waves occasionally around
15 feet. 
.saturday...west winds 15 to 20 knots increasing to 20 to
25 knots. waves 6 to 9 feet. waves occasionally around 12 feet. 


$$

fzus63 kdtx 240144
glflh 
expires:202603240945;;195039

open lake forecast for lake huron
national weather service detroit/pontiac mi
944 pm edt mon mar 23 2026

for waters beyond five nautical miles off shore on lake huron

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...high pressure, 30.50 inches, briefly centers over
southern lower michigan tonight, but then gets forced out on
tuesday by an ontario low pressure system and its cold front. the
trough feature crosses the northern great lakes tuesday, clipping
the northern waters of lake huron which results in a few
additional light snow showers. a warm front lifts across the
great lakes region wednesday offering milder and wetter
conditions midweek.


lhz462>464-240945-
lake huron from port austin to harbor beach beyond 5nm off shore-
lake huron from harbor beach to port sanilac beyond 5nm off shore-
lake huron from port sanilac to port huron beyond 5nm off shore-
944 pm edt mon mar 23 2026

.rest of tonight...northwest winds 10 to 15 knots becoming north
5 to 10 knots after midnight...then backing to the southwest
early in the morning. waves 3 to 5 feet subsiding to 2 to 4 feet
early in the morning. 
.tuesday...southwest winds 5 to 10 knots increasing to 10 to
15 knots in the late morning and afternoon. waves 1 to 3 feet
building to 2 to 4 feet in the afternoon. 
.tuesday night...west winds 5 to 10 knots backing to the south in
the late evening and overnight. waves 1 to 3 feet. 
.wednesday...south winds 10 to 15 knots. waves 1 to 3 feet
building to 2 to 4 feet in the late morning and afternoon. 
.wednesday night...south winds 10 to 15 knots. waves 1 to 3 feet.
.thursday...southwest winds 10 to 15 knots becoming northwest
15 to 20 knots late in the afternoon...then becoming north 20 to
25 knots with gusts to around 30 knots late in the evening. a
chance of rain late in the morning. waves 1 to 3 feet building to
8 to 12 feet. waves occasionally around 15 feet. 
.friday...north winds 20 to 25 knots with gusts to around
30 knots becoming northwest 10 to 15 knots . waves 8 to 12 feet
subsiding to 4 to 6 feet by midnight. waves occasionally around
15 feet. 
.saturday...west winds 15 to 20 knots. waves 4 to 6 feet. waves
occasionally around 8 feet. 


$$

fzus63 kmkx 240237
glflm 
expires:202603240930;;196563

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
937 pm cdt mon mar 23 2026

for waters beyond five nautical miles of shore on lake michigan.

waves are provided as a range of significant wave heights, which
is the average of the highest 1/3 of the wave, along with the
average height of the highest 10% of the waves which will
occasionally be encountered.

.synopsis...

winds are expected to become southwesterly breezy over the 
northern end of lake michigan over the next few hours. this will
happen as high pressure of 30.5 inches moves east and a sharper 
pressure gradient between the high and low pressure of 29.9 near
james bay moves over the lake. a few gale force gusts may occur on
an intermittent basis especially between 7am and noon cdt. 

winds will then ease during the early afternoon as a cold front
approaches the northern end of the lake and stalls through the
afternoon and into the evening.

largely south winds will then remain through wednesday into
thursday morning, as a broad low pressure around 29.8 inches 
approaches from the west. the next best chance for gales will come
thursday evening as the backside of a low pressure system around 
29.6 inches works southeast and a cold front plunges southward
down the lake.


lmz080-669-671-673-675-777-779-870-872-874-876-878-240930-
lake michigan from michigan city in to st. joseph mi 5 nm
offshore to mid lake-
lake michigan from sheboygan to port washington wi 5 nm offshore
to mid lake-
lake michigan from port washington to north point light wi 5 nm
offshore to mid lake-
lake michigan from north point light to wind point wi 5 nm
offshore to mid lake-
lake michigan from wind point wi to winthrop harbor il 5 nm
offshore to mid lake-
lake michigan from winthrop harbor to wilmette harbor il 5 nm
offshore to mid lake-
lake michigan from wilmette harbor il to michigan city in 5 nm
offshore to mid lake-
lake michigan from whitehall to pentwater mi 5 nm offshore to mid
lake-
lake michigan from grand haven to whitehall mi 5 nm offshore to
mid lake-
lake michigan from holland to grand haven mi 5 nm offshore to mid
lake-
lake michigan from south haven to holland mi 5 nm offshore to mid
lake-
lake michigan from st. joseph to south haven mi 5 nm offshore to
mid lake-
937 pm cdt mon mar 23 2026

sheboygan wi to pentwater mi south...

.rest of tonight...east winds 10 to 20 kt becoming south 15 to
25 kt. waves 2 to 4 ft. 
.tuesday...south winds 15 to 25 kt diminishing to 10 to 20 kt.
waves 4 to 6 ft occasionally to 8 ft. 
.tuesday night...south winds 10 to 15 kt. waves 2 to 4 ft
subsiding to 1 to 3 ft. 
.wednesday...south winds 10 to 20 kt. waves 3 to 5 ft. 
.wednesday night...southwest winds 10 to 15 kt becoming south.
waves 2 to 4 ft. 
.thursday...southwest winds 10 to 15 kt veering to northwest
10 to 20 kt. chance of rain in the afternoon. waves 2 to 4 ft
building to 3 to 5 ft. 
.thursday night...north gales to 35 kt. waves 8 to 11 ft
occasionally to 14 ft building to 10 to 14 ft occasionally to
18 ft. 
.friday...north winds to 30 kt diminishing to 15 to 25 kt. waves
10 to 14 ft occasionally to 18 ft subsiding to 7 to 10 ft
occasionally to 13 ft. 
.saturday...west winds 15 to 25 kt becoming southwest. waves 4 to
7 ft occasionally to 9 ft.  

$$

fzus63 kmkx 240237
glflm 
expires:202603240930;;196562

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
937 pm cdt mon mar 23 2026

for waters beyond five nautical miles of shore on lake michigan.

waves are provided as a range of significant wave heights, which
is the average of the highest 1/3 of the wave, along with the
average height of the highest 10% of the waves which will
occasionally be encountered.

.synopsis...

winds are expected to become southwesterly breezy over the 
northern end of lake michigan over the next few hours. this will
happen as high pressure of 30.5 inches moves east and a sharper 
pressure gradient between the high and low pressure of 29.9 near
james bay moves over the lake. a few gale force gusts may occur on
an intermittent basis especially between 7am and noon cdt. 

winds will then ease during the early afternoon as a cold front
approaches the northern end of the lake and stalls through the
afternoon and into the evening.

largely south winds will then remain through wednesday into
thursday morning, as a broad low pressure around 29.8 inches 
approaches from the west. the next best chance for gales will come
thursday evening as the backside of a low pressure system around 
29.6 inches works southeast and a cold front plunges southward
down the lake.


lmz261-362-364-366-563-565-567-868-240930-
lake michigan from seul choix point to rock island passage 5 nm
offshore to mid lake-
lake michigan south of a line from seul choix point to the
mackinac bridge and north of a line from charlevoix mi to south
fox island 5 nm offshore-
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-
937 pm cdt mon mar 23 2026

sheboygan wi to pentwater mi north...

.rest of tonight...south winds 10 to 20 kt becoming southwest to
30 kt. chance of snow overnight. waves 1 to 3 ft building to 4 to
6 ft occasionally to 8 ft. 
.tuesday...southwest winds to 30 kt diminishing to 10 to 20 kt.
chance of snow in the morning. waves 5 to 8 ft occasionally to
10 ft subsiding to 4 to 6 ft occasionally to 8 ft. 
.tuesday night...south winds 10 to 15 kt. waves 2 to 4 ft
subsiding to 1 to 3 ft. 
.wednesday...south winds 10 to 20 kt. waves 3 to 5 ft. 
.wednesday night...south winds 10 to 15 kt. waves 2 to 4 ft.
.thursday...southwest winds 10 to 20 kt veering to north 15 to
25 kt. chance of rain in the morning, then chance of rain and
snow in the afternoon. waves 1 to 3 ft building to 3 to 5 ft.
.thursday night...north winds to 30 kt. waves 8 to 11 ft
occasionally to 14 ft building to 8 to 12 ft occasionally to
16 ft. 
.friday...north winds to 30 kt becoming northwest 10 to 20 kt.
waves 8 to 11 ft occasionally to 14 ft subsiding to 4 to 7 ft
occasionally to 9 ft. 
.saturday...west winds 15 to 25 kt. waves 4 to 7 ft occasionally
to 9 ft.  

$$

fzus63 kmqt 240201
glfls 
expires:202603240800;;195365

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt mon mar 23 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

a clipper low around 29.9 inches tracks across northern ontario 
tonight and briefly extends a 30.1 inch trough over lake superior 
tuesday morning. 30.3 inch ridging quickly builds back over the lake 
by tuesday evening associated with high pressure of 30.4 inches over 
northern ontario. another clipper low around 29.7 inches phases with 
a shortwave low lifting off of the northern rockies tuesday and 
tuesday night, bringing troughing of at least 29.8 inches back 
across lake superior by wednesday. a secondary 29.6 inch low moves 
over the upper great lakes wednesday night into thursday. by friday, 
expansive ridging of 30.7 inches builds over the great plains, 
shifting over the mississippi river valley by saturday morning and 
south of the great lakes by that evening.



lsz264-240800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
1000 pm edt mon mar 23 2026

.rest of tonight...south winds 15 to 25 knots becoming southwest
20 to 30 knots after midnight, then becoming west to 30 knots
with a few gale force gusts to 35 knots possible late. a chance
of snow showers. a slight chance of rain showers after midnight.
waves 3 to 5 feet occasionally to 7 feet building to 6 to 9 feet
occasionally to 11 feet, then subsiding to 5 to 8 feet
occasionally to 10 feet. 
.tuesday...northwest winds 15 to 25 knots becoming north 10 to
20 knots in the afternoon, then becoming northeast 5 to 15 knots
late. waves subsiding to calm to 2 feet. 
.tuesday night...east winds 5 to 15 knots becoming southeast
10 to 20 knots after midnight. a slight chance of snow showers
after midnight. waves building to 2 to 4 feet. 
.wednesday...east winds 10 to 20 knots becoming northeast 5 to
15 knots by mid afternoon. a slight chance of rain showers
through early afternoon. a chance of snow showers. waves 2 to
4 feet. 
.wednesday night...east winds 5 to 15 knots increasing to 10 to
20 knots after midnight. a chance of snow showers. waves 2 to
4 feet. 
.thursday...north winds 15 to 25 knots. a chance of snow showers
through early afternoon. waves building to 3 to 5 feet
occasionally to 7 feet. 
.thursday night...north winds 15 to 25 knots. heavy freezing
spray. waves building to 3 to 6 feet occasionally to 8 feet. 
.friday...northwest winds 15 to 25 knots increasing to 20 to
30 knots. freezing spray. waves subsiding to 2 to 4 feet, then
building to 5 to 8 feet occasionally to 10 feet. 
.saturday...west winds 20 to 30 knots diminishing to 15 to
25 knots. freezing spray. waves subsiding to 3 to 6 feet
occasionally to 8 feet, then building to 4 to 7 feet occasionally
to 9 feet. 

$$

fzus63 kmqt 240201
glfls 
expires:202603240800;;195366

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt mon mar 23 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

a clipper low around 29.9 inches tracks across northern ontario 
tonight and briefly extends a 30.1 inch trough over lake superior 
tuesday morning. 30.3 inch ridging quickly builds back over the lake 
by tuesday evening associated with high pressure of 30.4 inches over 
northern ontario. another clipper low around 29.7 inches phases with 
a shortwave low lifting off of the northern rockies tuesday and 
tuesday night, bringing troughing of at least 29.8 inches back 
across lake superior by wednesday. a secondary 29.6 inch low moves 
over the upper great lakes wednesday night into thursday. by friday, 
expansive ridging of 30.7 inches builds over the great plains, 
shifting over the mississippi river valley by saturday morning and 
south of the great lakes by that evening.



lsz265-240800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
1000 pm edt mon mar 23 2026

.rest of tonight...south winds 10 to 20 knots increasing to 15 to
25 knots after midnight, then becoming southwest 20 to 30 knots
late. a chance of snow showers. waves 1 to 3 feet building to
2 to 4 feet. 
.tuesday...northwest winds 10 to 20 knots veering northeast late.
a slight chance of snow showers through early afternoon. waves
subsiding to 1 to 3 feet. 
.tuesday night...east winds 10 to 20 knots veering southeast
after midnight. a slight chance of snow showers after midnight.
waves subsiding to calm to 2 feet, then building to 1 to 3 feet. 
.wednesday...southeast winds 15 to 25 knots becoming east 10 to
20 knots by mid afternoon. a slight chance of rain and snow
showers through early afternoon. waves 1 to 3 feet. 
.wednesday night...east winds 10 to 20 knots. a chance of snow
showers. waves building to 2 to 4 feet. 
.thursday...north winds 15 to 25 knots increasing to 20 to
30 knots by mid afternoon. a chance of rain showers through early
afternoon. a chance of snow showers. freezing spray by mid
afternoon. waves building to 4 to 7 feet occasionally to 9 feet. 
.thursday night...north winds 20 to 30 knots. freezing spray.
waves building to 5 to 8 feet occasionally to 10 feet. 
.friday...northwest winds 20 to 30 knots backing west. heavy
freezing spray. waves subsiding to 3 to 6 feet occasionally to
8 feet. 
.saturday...west winds 20 to 30 knots. freezing spray. waves
subsiding to 2 to 4 feet, then building to 3 to 5 feet
occasionally to 7 feet. 

$$

fzus63 kmqt 240201
glfls 
expires:202603240800;;195367

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt mon mar 23 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

a clipper low around 29.9 inches tracks across northern ontario 
tonight and briefly extends a 30.1 inch trough over lake superior 
tuesday morning. 30.3 inch ridging quickly builds back over the lake 
by tuesday evening associated with high pressure of 30.4 inches over 
northern ontario. another clipper low around 29.7 inches phases with 
a shortwave low lifting off of the northern rockies tuesday and 
tuesday night, bringing troughing of at least 29.8 inches back 
across lake superior by wednesday. a secondary 29.6 inch low moves 
over the upper great lakes wednesday night into thursday. by friday, 
expansive ridging of 30.7 inches builds over the great plains, 
shifting over the mississippi river valley by saturday morning and 
south of the great lakes by that evening.



lsz266-240800-
lake superior east of a line from manitou island to marquette mi
and west of a line from grand marais mi to the us/canadian border
beyond 5nm from shore-
1000 pm edt mon mar 23 2026

.rest of tonight...south winds 15 to 25 knots increasing to 20 to
30 knots after midnight, then becoming southwest to 30 knots with
a few gale force gusts to 35 knots possible late. a chance of
snow showers. a slight chance of rain showers after midnight.
waves 2 to 4 feet building to 6 to 9 feet occasionally to
11 feet. 
.tuesday...northwest winds 20 to 30 knots becoming north 10 to
20 knots in the afternoon. a chance of snow showers through early
afternoon. waves subsiding to 2 to 4 feet. 
.tuesday night...east winds 10 to 20 knots veering southeast
after midnight, then becoming south 15 to 25 knots late. a slight
chance of snow showers after midnight. waves subsiding to calm to
2 feet, then building to 2 to 4 feet. 
.wednesday...southeast winds 15 to 25 knots backing east by mid
afternoon. a chance of snow showers, possibly mixed with rain.
waves 2 to 4 feet. 
.wednesday night...east winds 10 to 20 knots. a chance of snow
showers. a chance of rain showers after midnight. waves subsiding
to 1 to 3 feet, then building to 2 to 4 feet. 
.thursday...north winds 20 to 30 knots increasing to gales to
35 knots by mid afternoon. a chance of rain showers through early
afternoon. a chance of snow showers. freezing spray by mid
afternoon. waves building to 5 to 8 feet occasionally to 10 feet.
.thursday night...north gales to 35 knots diminishing to 20 to
30 knots after midnight. freezing spray. waves building to 6 to
9 feet occasionally to 11 feet. 
.friday...northwest winds 20 to 30 knots backing west. freezing
spray. waves subsiding to 4 to 7 feet occasionally to 9 feet,
then building to 7 to 10 feet occasionally to 13 feet. 
.saturday...northwest winds 20 to 30 knots backing west. freezing
spray. waves building to 9 to 12 feet occasionally to 15 feet,
then subsiding to 5 to 8 feet occasionally to 10 feet. 

$$

fzus63 kmqt 240201
glfls 
expires:202603240800;;195368

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt mon mar 23 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

a clipper low around 29.9 inches tracks across northern ontario 
tonight and briefly extends a 30.1 inch trough over lake superior 
tuesday morning. 30.3 inch ridging quickly builds back over the lake 
by tuesday evening associated with high pressure of 30.4 inches over 
northern ontario. another clipper low around 29.7 inches phases with 
a shortwave low lifting off of the northern rockies tuesday and 
tuesday night, bringing troughing of at least 29.8 inches back 
across lake superior by wednesday. a secondary 29.6 inch low moves 
over the upper great lakes wednesday night into thursday. by friday, 
expansive ridging of 30.7 inches builds over the great plains, 
shifting over the mississippi river valley by saturday morning and 
south of the great lakes by that evening.



lsz267-240800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
1000 pm edt mon mar 23 2026

.rest of tonight...south winds 10 to 20 knots increasing to 20 to
30 knots after midnight, then veering southwest late. a chance of
snow showers. waves 1 to 3 feet building to 6 to 9 feet
occasionally to 11 feet. 
.tuesday...west winds 20 to 30 knots becoming northwest 15 to
25 knots in the afternoon, then diminishing to 10 to 20 knots
late. a slight chance of snow showers through early afternoon.
waves subsiding to 2 to 4 feet. 
.tuesday night...east winds 5 to 15 knots becoming southeast
10 to 20 knots after midnight, then increasing to 15 to 25 knots
late. a slight chance of snow showers after midnight. waves
subsiding to calm to 2 feet, then building to 2 to 4 feet. 
.wednesday...southeast winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. a slight chance of rain showers
through early afternoon. a chance of snow showers. waves
subsiding to 1 to 3 feet. 
.wednesday night...east winds 10 to 20 knots veering southeast
after midnight. a chance of snow showers. a chance of rain
showers after midnight. waves subsiding to calm to 2 feet, then
building to 1 to 3 feet. 
.thursday...north winds 15 to 25 knots increasing to 20 to
30 knots by mid afternoon. a chance of rain showers through early
afternoon. a chance of snow showers. waves building to 4 to
7 feet occasionally to 9 feet. 
.thursday night...north winds 20 to 30 knots diminishing to 15 to
25 knots after midnight. heavy freezing spray. waves building to
4 to 8 feet occasionally to 10 feet. 
.friday...northwest winds 15 to 25 knots increasing to 20 to
30 knots. freezing spray. waves subsiding to 3 to 6 feet
occasionally to 8 feet, then building to 7 to 10 feet
occasionally to 13 feet. 
.saturday...west winds 20 to 30 knots diminishing to 15 to
25 knots. freezing spray. waves building to 9 to 12 feet
occasionally to 15 feet, then subsiding to 6 to 9 feet
occasionally to 11 feet. 

$$

fzus63 kmqt 240201
glfls 
expires:202603240800;;195363

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt mon mar 23 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

a clipper low around 29.9 inches tracks across northern ontario 
tonight and briefly extends a 30.1 inch trough over lake superior 
tuesday morning. 30.3 inch ridging quickly builds back over the lake 
by tuesday evening associated with high pressure of 30.4 inches over 
northern ontario. another clipper low around 29.7 inches phases with 
a shortwave low lifting off of the northern rockies tuesday and 
tuesday night, bringing troughing of at least 29.8 inches back 
across lake superior by wednesday. a secondary 29.6 inch low moves 
over the upper great lakes wednesday night into thursday. by friday, 
expansive ridging of 30.7 inches builds over the great plains, 
shifting over the mississippi river valley by saturday morning and 
south of the great lakes by that evening.



lsz162-240800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 pm edt mon mar 23 2026 /900 pm cdt mon mar 23 2026/

.rest of tonight...southwest winds 10 to 20 knots increasing to
15 to 25 knots after midnight, then veering west late. a slight
chance of rain showers by midnight. a slight chance of snow
showers. waves 1 to 3 feet building to 3 to 5 feet occasionally
to 7 feet, then subsiding to 2 to 4 feet. 
.tuesday...north winds 5 to 15 knots veering east in the
afternoon, then increasing to 10 to 20 knots late. waves
subsiding to calm to 2 feet. 
.tuesday night...east winds 10 to 20 knots diminishing to 5 to
15 knots after midnight, then backing northeast late. a slight
chance of freezing rain and snow showers after midnight. waves
building to 1 to 3 feet. 
.wednesday...northeast winds 10 to 20 knots. a slight chance of
freezing rain through early afternoon. a slight chance of snow
showers. waves subsiding to calm to 2 feet, then building to 1 to
3 feet. 
.wednesday night...east winds 5 to 15 knots becoming northeast
10 to 20 knots after midnight. a chance of snow showers. a chance
of rain showers after midnight. waves 1 to 3 feet. 
.thursday...north winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. a chance of rain showers through early
afternoon. a chance of snow showers. waves building to 2 to
4 feet, then subsiding to 1 to 3 feet. 
.thursday night...north winds 10 to 20 knots. waves 1 to 3 feet. 
.friday...west winds 10 to 20 knots increasing to 15 to 25 knots.
waves subsiding to calm to 2 feet, then building to 2 to 4 feet. 
.saturday...west winds 15 to 25 knots diminishing to 10 to
20 knots. waves subsiding to 1 to 3 feet. 

$$

fzus63 kmqt 240201
glfls 
expires:202603240800;;195364

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt mon mar 23 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

a clipper low around 29.9 inches tracks across northern ontario 
tonight and briefly extends a 30.1 inch trough over lake superior 
tuesday morning. 30.3 inch ridging quickly builds back over the lake 
by tuesday evening associated with high pressure of 30.4 inches over 
northern ontario. another clipper low around 29.7 inches phases with 
a shortwave low lifting off of the northern rockies tuesday and 
tuesday night, bringing troughing of at least 29.8 inches back 
across lake superior by wednesday. a secondary 29.6 inch low moves 
over the upper great lakes wednesday night into thursday. by friday, 
expansive ridging of 30.7 inches builds over the great plains, 
shifting over the mississippi river valley by saturday morning and 
south of the great lakes by that evening.



lsz263-240800-
lake superior from saxon harbor wi to upper entrance to portage
canal mi 5nm off shore to the us/canadian border including isle
royale national park-
1000 pm edt mon mar 23 2026

.rest of tonight...south winds 10 to 20 knots becoming southwest
20 to 30 knots after midnight, then veering west late. a chance
of rain showers by midnight. a chance of snow showers. waves 2 to
4 feet building to 4 to 7 feet occasionally to 9 feet, then
subsiding to 3 to 6 feet occasionally to 8 feet. 
.tuesday...northwest winds 10 to 20 knots becoming northeast 5 to
15 knots in the afternoon, then veering east late. waves
subsiding to calm to 2 feet. 
.tuesday night...east winds 5 to 15 knots veering southeast late.
a slight chance of freezing rain and snow showers after midnight.
waves building to 1 to 3 feet. 
.wednesday...east winds 10 to 20 knots becoming northeast 5 to
15 knots by mid afternoon. a slight chance of rain showers
through early afternoon. a slight chance of snow showers. waves
building to 2 to 4 feet. 
.wednesday night...northeast winds 5 to 15 knots increasing to
10 to 20 knots after midnight. a chance of snow showers. a chance
of rain showers after midnight. waves 2 to 4 feet. 
.thursday...north winds 10 to 20 knots. a chance of rain showers
through early afternoon. a chance of snow showers. waves building
to 3 to 5 feet occasionally to 7 feet. 
.thursday night...north winds 15 to 25 knots. freezing spray
after midnight. waves subsiding to 2 to 4 feet, then building to
3 to 6 feet occasionally to 8 feet. 
.friday...west winds 10 to 20 knots increasing to 15 to 25 knots.
freezing spray. waves subsiding to 2 to 4 feet, then building to
4 to 7 feet occasionally to 9 feet. 
.saturday...west winds 15 to 25 knots. waves subsiding to 3 to
6 feet occasionally to 8 feet. 

$$