fzus63 kdtx 231359
glflh 
expires:202603232200;;168653

open lake forecast for lake huron
national weather service detroit/pontiac mi
959 am 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, builds into the western
great lakes today while flurries linger over the central
waterways until this evening. the ridge 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.


lhz361-232200-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
959 am edt mon mar 23 2026

.rest of today...northwest winds 10 to 15 knots. waves 1 to
3 feet. 
.tonight...northwest winds 10 to 15 knots becoming west 5 to
10 knots late in the evening...then backing to the south after
midnight increasing to 10 to 15 knots early in the morning. waves
1 to 3 feet. 
.tuesday...southwest winds 15 to 20 knots becoming west 10 to
15 knots early in the afternoon. waves 2 to 4 feet. 
.tuesday night...west winds 5 to 10 knots becoming south 10 to
15 knots after midnight. waves 1 to 3 feet. 
.wednesday...southeast winds 10 to 15 knots. a chance of rain and
snow late in the morning. waves 2 to 4 feet subsiding to 1 to
3 feet late in the afternoon. 
.thursday...east winds 10 to 15 knots becoming northwest 15 to
20 knots early in the evening...then becoming north 20 to
25 knots by midnight. rain and snow likely until early evening.
waves 2 to 4 feet. 
.friday...north winds 20 to 25 knots decreasing to 10 to 15 knots
in the late morning and early afternoon...then becoming northwest
15 to 20 knots . waves 2 to 4 feet. 

wave heights are for ice free areas.

$$

fzus63 kdtx 231359
glflh 
expires:202603232200;;168654

open lake forecast for lake huron
national weather service detroit/pontiac mi
959 am 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, builds into the western
great lakes today while flurries linger over the central
waterways until this evening. the ridge 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.


lhz362-363-232200-
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-
959 am edt mon mar 23 2026

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


$$

fzus63 kdtx 231359
glflh 
expires:202603232200;;168655

open lake forecast for lake huron
national weather service detroit/pontiac mi
959 am 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, builds into the western
great lakes today while flurries linger over the central
waterways until this evening. the ridge 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>464-232200-
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-
959 am edt mon mar 23 2026

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


$$

fzus63 kmkx 231407
glflm 
expires:202603232115;;169125

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

low pressure of 29.6 inches off the coast of maine will continue
east as high pressure of 30.5 inches in the northern plains
advects toward michigan. the pressure gradient is weaken between
these two systems which will bring an end to the gusty winds.
winds will continue to diminish through this afternoon as the high
builds in. light and variable winds are expected this evening into
tonight as the high moves overhead. 

as this high exits tuesday and a weak front passes, winds may 
pick up a bit from the south. largely south winds remain through
wednesday, as a broad low pressure around 29.8 inches approaches 
from the west. chances for precipitation on tuesday and again on 
wednesday though primarily for northern parts of the lake.


lmz080-669-671-673-675-777-779-870-872-874-876-878-232115-
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-
907 am cdt mon mar 23 2026

sheboygan wi to pentwater mi south...

.rest of today...north winds 15 to 25 kt diminishing to 10 to
20 kt. waves 6 to 9 ft occasionally to 12 ft subsiding to 4 to
6 ft occasionally to 8 ft. 
.tonight...northeast winds 10 to 15 kt veering to south 10 to
20 kt. waves 3 to 5 ft subsiding to 2 to 4 ft. 
.tuesday...southwest winds 10 to 20 kt becoming south. chance of
sprinkles and flurries in the morning. waves 4 to 6 ft
occasionally to 8 ft. 
.tuesday night...south winds 10 to 15 kt increasing to 10 to
20 kt. waves 2 to 4 ft. 
.wednesday...south winds 10 to 20 kt. waves 3 to 5 ft. 
.wednesday night...southeast winds 10 to 20 kt. waves 2 to 4 ft
subsiding to 1 to 3 ft. 
.thursday...south winds 10 to 20 kt veering to west. chance of
rain. waves 1 to 3 ft building to 3 to 5 ft. 
.friday...north winds to 30 kt diminishing to 15 to 25 kt. waves
10 to 14 ft occasionally to 18 ft subsiding to 8 to 11 ft
occasionally to 14 ft.  

$$

fzus63 kmkx 231407
glflm 
expires:202603232115;;169124

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

low pressure of 29.6 inches off the coast of maine will continue
east as high pressure of 30.5 inches in the northern plains
advects toward michigan. the pressure gradient is weaken between
these two systems which will bring an end to the gusty winds.
winds will continue to diminish through this afternoon as the high
builds in. light and variable winds are expected this evening into
tonight as the high moves overhead. 

as this high exits tuesday and a weak front passes, winds may 
pick up a bit from the south. largely south winds remain through
wednesday, as a broad low pressure around 29.8 inches approaches 
from the west. chances for precipitation on tuesday and again on 
wednesday though primarily for northern parts of the lake.


lmz261-362-364-366-563-565-567-868-232115-
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-
907 am cdt mon mar 23 2026

sheboygan wi to pentwater mi north...

.rest of today...northwest winds 10 to 20 kt becoming north 10 to
15 kt. waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to
4 ft. 
.tonight...south winds 5 to 10 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 flurries and sprinkles 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 20 kt. waves 3 to 5 ft. 
.wednesday...south winds 10 to 20 kt. waves 3 to 5 ft. 
.wednesday night...east winds 10 to 20 kt. waves 3 to 5 ft. 
.thursday...south winds 10 to 20 kt veering to northwest. chance
of rain and snow. waves 1 to 3 ft building to 3 to 5 ft. 
.friday...north winds to 30 kt becoming northwest 15 to 25 kt.
waves 8 to 12 ft occasionally to 16 ft subsiding to 5 to 8 ft
occasionally to 10 ft.  

$$

fzus63 kmqt 231401
glfls 
expires:202603232000;;168728

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

ridging builds to 30.4 inches over the western great lakes basin 
throughout today. a clipper low around 29.9 inches tracks across 
northern ontario 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.



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

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

$$

fzus63 kmqt 231401
glfls 
expires:202603232000;;168729

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

ridging builds to 30.4 inches over the western great lakes basin 
throughout today. a clipper low around 29.9 inches tracks across 
northern ontario 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.



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

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

$$

fzus63 kmqt 231401
glfls 
expires:202603232000;;168730

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

ridging builds to 30.4 inches over the western great lakes basin 
throughout today. a clipper low around 29.9 inches tracks across 
northern ontario 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.



lsz266-232000-
lake superior east of a line from manitou island to marquette mi
and west of a line from grand marais mi to the us/canadian border
beyond 5nm from shore-
1000 am edt mon mar 23 2026

.rest of today...northwest winds 10 to 20 knots backing west
late. a slight chance of snow showers by late morning. waves 1 to
3 feet subsiding to calm to 2 feet. 
.tonight...south winds 15 to 25 knots increasing to 30 knots with
a few gale force gusts to 35 knots possible after midnight, then
veering southwest late. a chance of snow showers, possibly mixed
with rain after midnight. waves building to 5 to 8 feet
occasionally to 10 feet. 
.tuesday...west winds 20 to 30 knots becoming north 15 to
25 knots in the afternoon, then diminishing to 10 to 20 knots
late. a chance of snow showers, possibly mixed with rain through
early afternoon. waves subsiding to 2 to 4 feet. 
.tuesday night...southeast winds 10 to 20 knots increasing to
15 to 25 knots after midnight. a slight chance of snow showers
after midnight. waves subsiding to calm to 2 feet, then building
to 3 to 5 feet occasionally to 7 feet. 
.wednesday...southeast winds 15 to 25 knots backing northeast by
mid afternoon. a chance of snow showers, possibly mixed with
rain. waves subsiding to 2 to 4 feet. 
.wednesday night...northeast winds 10 to 20 knots veering east
after midnight. a chance of snow showers. waves subsiding to 1 to
3 feet. 
.thursday...north winds 20 to 30 knots increasing to gales to
35 knots. a chance of snow showers. freezing spray. waves
building to 8 to 11 feet occasionally to 14 feet. 
.friday...northwest winds 20 to 30 knots backing west. freezing
spray. waves subsiding to 5 to 8 feet occasionally to 10 feet,
then building to 7 to 10 feet occasionally to 13 feet. 

$$

fzus63 kmqt 231401
glfls 
expires:202603232000;;168731

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

ridging builds to 30.4 inches over the western great lakes basin 
throughout today. a clipper low around 29.9 inches tracks across 
northern ontario 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.



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

.rest of today...north winds 5 to 15 knots backing northwest in
the afternoon, then becoming west 10 to 20 knots late. a slight
chance of snow showers by late morning. waves calm to 2 feet. 
.tonight...south winds 10 to 20 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 after midnight. waves building to 5 to 8 feet
occasionally to 10 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 chance of snow showers through early afternoon. waves
subsiding to 2 to 4 feet. 
.tuesday night...southeast winds 5 to 15 knots increasing to
15 to 25 knots after midnight. 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 becoming east 10 to
20 knots by mid afternoon. a chance of snow showers. waves
subsiding to 1 to 3 feet. 
.wednesday night...east winds 10 to 20 knots. a chance of snow
showers. 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. a chance of snow showers. freezing spray. waves
building to 6 to 9 feet occasionally to 11 feet. 
.friday...northwest winds 15 to 25 knots becoming west 20 to
30 knots. freezing spray. waves subsiding to 5 to 8 feet
occasionally to 10 feet, then building to 8 to 11 feet
occasionally to 14 feet. 

$$

fzus63 kmqt 231401
glfls 
expires:202603232000;;168726

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

ridging builds to 30.4 inches over the western great lakes basin 
throughout today. a clipper low around 29.9 inches tracks across 
northern ontario 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.



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

.rest of today...west winds 5 to 15 knots backing south late.
waves calm to 2 feet. 
.tonight...south winds 10 to 20 knots becoming southwest 15 to
25 knots after midnight, then becoming west 10 to 20 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. 
.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 backing northeast
after midnight. a slight chance of snow showers after midnight.
waves building to 1 to 3 feet. 
.wednesday...northeast winds 10 to 20 knots. a slight chance of
rain showers through early afternoon. a slight chance of snow
showers. waves building to 2 to 4 feet. 
.wednesday night...east winds 10 to 20 knots. a chance of snow
showers. a chance of rain showers and freezing rain after
midnight. waves subsiding to 1 to 3 feet. 
.thursday...northeast winds 10 to 20 knots backing north. a
chance of snow showers, possibly mixed with rain and freezing
rain. waves building to 2 to 4 feet, then subsiding to 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 3 to 5 feet
occasionally to 7 feet. 

$$

fzus63 kmqt 231401
glfls 
expires:202603232000;;168727

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

ridging builds to 30.4 inches over the western great lakes basin 
throughout today. a clipper low around 29.9 inches tracks across 
northern ontario 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.



lsz263-232000-
lake superior from saxon harbor wi to upper entrance to portage
canal mi 5nm off shore to the us/canadian border including isle
royale national park-
1000 am edt mon mar 23 2026

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

$$