fzus63 kdtx 240731
glflh 
expires:202603241545;;207986

open lake forecast for lake huron
national weather service detroit/pontiac mi
331 am edt tue mar 24 2026

for waters beyond five nautical miles off shore on lake huron

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

.synopsis...high pressure, 30.50 inches, will exit to the
southeast today as an ontario low pressure system and its cold 
front track across the northern great lakes. a lingering trough 
feature crosses the northern great lakes this afternoon, 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.


lhz361-241545-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
331 am edt tue mar 24 2026

.today...south winds 10 to 15 knots becoming southwest 15 to
20 knots with gusts to around 30 knots in the late morning and
early afternoon...then becoming west 10 to 15 knots late in the
afternoon. a chance of snow showers. waves 1 to 3 feet building
to 3 to 5 feet in the late morning and afternoon. 
.tonight...west winds 5 to 10 knots in the evening becoming light
and variable...then becoming east 5 to 10 knots early in the
morning. waves 2 to 4 feet subsiding to 2 feet or less in the
late evening and overnight. 
.wednesday...southeast winds 10 to 15 knots. waves 1 to 3 feet
building to 2 to 4 feet in the late morning and afternoon. 
.wednesday night...southeast winds 5 to 10 knots veering to the
south after midnight. waves 1 to 3 feet. 
.thursday...southwest winds 10 to 15 knots becoming northwest
15 to 20 knots late in the afternoon. a chance of showers...then
a chance of rain and snow showers late in the afternoon. waves
1 to 3 feet building to 4 to 6 feet. waves occasionally around
8 feet. 
.friday...north winds 10 to 15 knots backing to the northwest .
waves 3 to 5 feet. 
.saturday...west winds 15 to 20 knots. waves 4 to 6 feet. waves
occasionally around 8 feet. 

wave heights are for ice free areas.

$$

fzus63 kdtx 240731
glflh 
expires:202603241545;;207987

open lake forecast for lake huron
national weather service detroit/pontiac mi
331 am edt tue mar 24 2026

for waters beyond five nautical miles off shore on lake huron

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

.synopsis...high pressure, 30.50 inches, will exit to the
southeast today as an ontario low pressure system and its cold 
front track across the northern great lakes. a lingering trough 
feature crosses the northern great lakes this afternoon, 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.


lhz362-363-241545-
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-
331 am edt tue mar 24 2026

.today...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. a chance of
snow showers. waves 2 to 4 feet building to 5 to 7 feet in the
late morning and afternoon. waves occasionally around 10 feet. 
.tonight...west winds 5 to 10 knots early in the evening becoming
light and variable...then becoming east 5 to 10 knots early in
the morning. waves 2 to 4 feet subsiding to 1 to 3 feet after
midnight. 
.wednesday...east winds 5 to 10 knots becoming southeast 10 to
15 knots in the late morning and afternoon. 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 2 to 4 feet
subsiding to 1 to 3 feet in the late evening and overnight. 
.thursday...southwest winds 10 to 15 knots becoming northwest
20 to 25 knots with gusts to around 30 knots late in the
afternoon. a chance of showers. waves 2 to 4 feet building to
6 to 9 feet. waves occasionally around 12 feet. 
.friday...north winds 20 to 25 knots decreasing to 10 to 15 knots
until early evening...then becoming west 15 to 20 knots by
midnight. waves 8 to 12 feet subsiding to 4 to 6 feet . waves
occasionally around 15 feet. 
.saturday...west winds 15 to 20 knots. waves 5 to 7 feet. waves
occasionally around 10 feet. 


$$

fzus63 kdtx 240731
glflh 
expires:202603241545;;207988

open lake forecast for lake huron
national weather service detroit/pontiac mi
331 am edt tue mar 24 2026

for waters beyond five nautical miles off shore on lake huron

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

.synopsis...high pressure, 30.50 inches, will exit to the
southeast today as an ontario low pressure system and its cold 
front track across the northern great lakes. a lingering trough 
feature crosses the northern great lakes this afternoon, 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>464-241545-
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-
331 am edt tue mar 24 2026

.today...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 3 to 5 feet in the late morning and afternoon. 
.tonight...southwest winds 5 to 10 knots early in the evening
becoming light and variable...then becoming southeast 5 to
10 knots after midnight. waves 1 to 3 feet. 
.wednesday...southeast winds 5 to 10 knots becoming south 10 to
15 knots in the late morning and afternoon. waves 1 to 3 feet. 
.wednesday night...south winds 10 to 15 knots. waves 1 to 3 feet.
.thursday...south 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.
showers likely late in the afternoon. a chance of showers late in
the evening. 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 decreasing to 10 to 15 knots. waves 6 to 9 feet
subsiding to 3 to 5 feet by midnight. waves occasionally around
12 feet. 
.saturday...west winds 10 to 15 knots increasing to 15 to
20 knots in the late morning and early afternoon...then becoming
northwest 10 to 15 knots . waves 3 to 5 feet. 


$$

fzus63 kmkx 240852
glflm 
expires:202603241515;;210795

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
352 am cdt tue mar 24 2026

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

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

.synopsis...

high pressure around 30.5 inches in southwestern michigan will
continue east early this morning as a low pressure around 29.9
inches in western ontario moves toward james bay. winds will 
become breezy across the northern third of the lake as these two 
systems move east. an few intermittent gale force gusts may occur 
through noon cdt. winds will then ease during the early afternoon 
as a cold front approaches the northern end of the lake and stalls
late this afternoon into this 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.


lmz080-669-671-673-675-777-779-870-872-874-876-878-241515-
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-
352 am cdt tue mar 24 2026

sheboygan wi to pentwater mi south...

.today...south winds 15 to 25 kt diminishing to 10 to 20 kt.
waves 3 to 5 ft. 
.tonight...southeast winds 10 to 15 kt becoming south. waves 2 to
4 ft subsiding to 1 to 3 ft. 
.wednesday...south winds 10 to 20 kt. waves 2 to 4 ft. 
.wednesday night...south winds 10 to 15 kt becoming southwest.
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. chance of rain. 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
8 to 12 ft occasionally to 16 ft subsiding to 6 to 9 ft
occasionally to 12 ft. 
.saturday...west winds 10 to 20 kt becoming southwest. waves 4 to
6 ft occasionally to 8 ft.  

$$

fzus63 kmkx 240852
glflm 
expires:202603241515;;210794

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
352 am cdt tue mar 24 2026

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

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

.synopsis...

high pressure around 30.5 inches in southwestern michigan will
continue east early this morning as a low pressure around 29.9
inches in western ontario moves toward james bay. winds will 
become breezy across the northern third of the lake as these two 
systems move east. an few intermittent gale force gusts may occur 
through noon cdt. winds will then ease during the early afternoon 
as a cold front approaches the northern end of the lake and stalls
late this afternoon into this 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.


lmz261-362-364-366-563-565-567-868-241515-
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-
352 am cdt tue mar 24 2026

sheboygan wi to pentwater mi north...

.today...southwest winds to 30 kt increasing to gales to 35 kt,
then diminishing to 10 to 20 kt late. chance of snow this
morning. waves 5 to 8 ft occasionally to 10 ft subsiding to 4 to
6 ft occasionally to 8 ft. 
.tonight...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 2 to 4 ft. 
.wednesday night...south winds 10 to 15 kt. waves 2 to 4 ft.
.thursday...west 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 2 to 4 ft building to 3 to 5 ft.
.thursday night...north winds to 30 kt. waves 8 to 11 ft
occasionally to 14 ft. 
.friday...north winds to 30 kt becoming northwest 10 to 20 kt.
waves 6 to 9 ft occasionally to 12 ft subsiding to 4 to 6 ft
occasionally to 8 ft. 
.saturday...west winds 15 to 25 kt. waves 4 to 6 ft occasionally
to 8 ft.  

$$

fzus63 kmqt 240801
glfls 
expires:202603242000;;208771

open lake forecast for lake superior
national weather service marquette mi
400 am edt tue mar 24 2026

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

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

.synopsis...

a clipper low around 29.9 inches tracks across northern ontario and 
briefly extends a 30.1 inch trough over lake superior this morning. 
30.3 inch ridging quickly builds back over the lake this 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.



lsz264-242000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
400 am edt tue mar 24 2026

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

$$

fzus63 kmqt 240801
glfls 
expires:202603242000;;208772

open lake forecast for lake superior
national weather service marquette mi
400 am edt tue mar 24 2026

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

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

.synopsis...

a clipper low around 29.9 inches tracks across northern ontario and 
briefly extends a 30.1 inch trough over lake superior this morning. 
30.3 inch ridging quickly builds back over the lake this 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.



lsz265-242000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
400 am edt tue mar 24 2026

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

$$

fzus63 kmqt 240801
glfls 
expires:202603242000;;208773

open lake forecast for lake superior
national weather service marquette mi
400 am edt tue mar 24 2026

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

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

.synopsis...

a clipper low around 29.9 inches tracks across northern ontario and 
briefly extends a 30.1 inch trough over lake superior this morning. 
30.3 inch ridging quickly builds back over the lake this 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.



lsz266-242000-
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 am edt tue mar 24 2026

.early this morning...southwest winds 20 to 30 knots. a chance of
snow showers. waves 5 to 9 feet occasionally to 11 feet, then
subsiding to 5 to 8 feet occasionally to 10 feet. 
.today...west winds 15 to 25 knots veering north 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. 
.tonight...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 2 to 4 feet. 
.wednesday...south winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon, then backing southeast late. a chance
of rain and snow showers. waves subsiding to 1 to 3 feet. 
.wednesday night...southeast winds 10 to 20 knots backing east
after midnight. a chance of rain and snow showers. waves 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. freezing spray by mid afternoon. waves building to
7 to 10 feet occasionally to 13 feet. 
.thursday night...north gales to 35 knots diminishing to 20 to
30 knots after midnight. freezing spray. waves subsiding to 4 to
7 feet occasionally to 9 feet. 
.friday...northwest winds 20 to 30 knots. freezing spray. waves
subsiding to 3 to 5 feet occasionally to 7 feet, then building to
6 to 9 feet occasionally to 11 feet. 
.saturday...west winds 20 to 30 knots diminishing to 15 to
25 knots. freezing spray. waves building to 7 to 10 feet
occasionally to 13 feet, then subsiding to 4 to 7 feet
occasionally to 9 feet. 

$$

fzus63 kmqt 240801
glfls 
expires:202603242000;;208774

open lake forecast for lake superior
national weather service marquette mi
400 am edt tue mar 24 2026

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

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

.synopsis...

a clipper low around 29.9 inches tracks across northern ontario and 
briefly extends a 30.1 inch trough over lake superior this morning. 
30.3 inch ridging quickly builds back over the lake this 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.



lsz267-242000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
400 am edt tue mar 24 2026

.early this morning...southwest winds 20 to 30 knots. snow
showers likely. waves 5 to 8 feet occasionally to 10 feet. 
.today...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. 
.tonight...northeast 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...south winds 15 to 25 knots becoming southeast 10 to
20 knots in the afternoon. a chance of rain and snow showers.
waves subsiding to calm to 2 feet. 
.wednesday night...southeast winds 10 to 20 knots. a chance of
freezing rain through midnight. a chance of rain and snow
showers. waves building to 1 to 3 feet. 
.thursday...northwest winds 15 to 25 knots becoming north 20 to
30 knots by mid afternoon. a chance of rain showers, possibly
mixed with snow. waves building to 5 to 8 feet occasionally to
10 feet. 
.thursday night...north winds 20 to 30 knots diminishing to 15 to
25 knots after midnight. freezing spray. waves building to 6 to
9 feet occasionally to 11 feet, then subsiding 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 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 8 to 11 feet
occasionally to 14 feet, then subsiding to 4 to 7 feet
occasionally to 9 feet. 

$$

fzus63 kmqt 240801
glfls 
expires:202603242000;;208769

open lake forecast for lake superior
national weather service marquette mi
400 am edt tue mar 24 2026

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

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

.synopsis...

a clipper low around 29.9 inches tracks across northern ontario and 
briefly extends a 30.1 inch trough over lake superior this morning. 
30.3 inch ridging quickly builds back over the lake this 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.



lsz162-242000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am edt tue mar 24 2026 /300 am cdt tue mar 24 2026/

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

$$

fzus63 kmqt 240801
glfls 
expires:202603242000;;208770

open lake forecast for lake superior
national weather service marquette mi
400 am edt tue mar 24 2026

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

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

.synopsis...

a clipper low around 29.9 inches tracks across northern ontario and 
briefly extends a 30.1 inch trough over lake superior this morning. 
30.3 inch ridging quickly builds back over the lake this 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.



lsz263-242000-
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 am edt tue mar 24 2026

.early this morning...west winds 15 to 25 knots. a slight chance
of rain and snow showers. waves 4 to 7 feet occasionally to
9 feet subsiding to 3 to 6 feet occasionally to 8 feet. 
.today...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. 
.tonight...east winds 5 to 15 knots veering southeast late. a
slight chance of snow showers after midnight. waves building to
1 to 3 feet. 
.wednesday...east winds 5 to 15 knots backing northeast late. a
chance of freezing rain through early afternoon. a chance of snow
showers, possibly mixed with rain. waves building to 2 to 4 feet,
then subsiding to 1 to 3 feet. 
.wednesday night...northeast winds 5 to 15 knots increasing to
10 to 20 knots after midnight. a chance of snow showers, possibly
mixed with rain. a chance of freezing rain after midnight. waves
building to 2 to 4 feet. 
.thursday...north winds 15 to 25 knots. waves building to 3 to
5 feet occasionally to 7 feet. 
.thursday night...north winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. waves subsiding to 2 to 4 feet. 
.friday...west winds 15 to 25 knots. freezing spray. waves
subsiding to 1 to 3 feet, then building to 3 to 6 feet
occasionally to 8 feet. 
.saturday...west winds 15 to 25 knots diminishing to 10 to
20 knots. waves subsiding to 2 to 4 feet, then building to 3 to
5 feet occasionally to 7 feet. 

$$