fzus63 kdtx 311347
glflh 
expires:202603312200;;592638

open lake forecast for lake huron
national weather service detroit/pontiac mi
947 am edt tue mar 31 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...a frontal boundary draped across central lake huron
and lower mi moves steadily south and east today and tonight. the
front is the focus for showers and thunderstorms, with the
potential for strong to severe thunderstorms. marine conditions
turn colder and remain unsettled post front highlighted by
moderate northerly wind and higher waves south half tonight and
wednesday. winds shift easterly and increase across the north
half thursday with gusts reaching up to around 30 knots as the
next low pressure system approaches the midwest.


lhz361-312200-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
947 am edt tue mar 31 2026

.rest of today...northeast winds 10 to 15 knots. scattered
showers late in the morning...then scattered showers and a chance
of freezing rain in the afternoon. waves 3 to 5 feet. 
.tonight...northeast winds 5 to 10 knots becoming north 10 to
15 knots in the late evening and overnight. freezing rain likely
and scattered showers in the evening. waves 1 to 3 feet. 
.wednesday...northeast winds 10 to 15 knots decreasing to 5 to
10 knots early in the afternoon. waves 1 to 3 feet. 
.wednesday night...northeast winds 5 to 10 knots becoming east
20 to 25 knots with gusts to around 30 knots. a chance of snow
after midnight. waves 1 to 3 feet building to 6 to 9 feet. waves
occasionally around 12 feet. 
.thursday...east winds to 30 knots decreasing to 20 to 25 knots
late in the evening. gusts to 35 knot gales. snow. freezing rain
late in the morning. rain. waves 8 to 12 feet. waves occasionally
around 15 feet. 
.friday...south winds 15 to 20 knots veering to the west in the
late morning and early afternoon...then decreasing to 10 to
15 knots early in the evening becoming northeast 15 to 20 knots
by midnight. rain likely early in the morning. waves 5 to 7 feet.
waves occasionally around 10 feet. 
.saturday...east winds 20 to 25 knots decreasing to 15 to
20 knots early in the evening...then becoming north 20 to
25 knots by midnight. rain and freezing rain likely until
afternoon...then rain likely . waves 6 to 9 feet. waves
occasionally around 12 feet. 

wave heights are for ice free areas.

$$

fzus63 kdtx 311347
glflh 
expires:202603312200;;592639

open lake forecast for lake huron
national weather service detroit/pontiac mi
947 am edt tue mar 31 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...a frontal boundary draped across central lake huron
and lower mi moves steadily south and east today and tonight. the
front is the focus for showers and thunderstorms, with the
potential for strong to severe thunderstorms. marine conditions
turn colder and remain unsettled post front highlighted by
moderate northerly wind and higher waves south half tonight and
wednesday. winds shift easterly and increase across the north
half thursday with gusts reaching up to around 30 knots as the
next low pressure system approaches the midwest.


lhz362-363-312200-
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-
947 am edt tue mar 31 2026

.rest of today...northeast winds 10 to 15 knots. numerous
showers. waves 3 to 5 feet. 
.tonight...north winds 10 to 15 knots increasing to 15 to
20 knots early in the morning. numerous showers in the evening.
waves 3 to 5 feet. 
.wednesday...north winds 15 to 20 knots becoming northeast 10 to
15 knots early in the afternoon. waves 4 to 6 feet. waves
occasionally around 8 feet. 
.wednesday night...northeast winds 15 to 20 knots increasing to
20 to 25 knots with gusts to around 30 knots after midnight. a
chance of snow and rain after midnight. waves 4 to 6 feet
building to 6 to 9 feet after midnight. waves occasionally around
12 feet. 
.thursday...east winds 20 to 25 knots veering to the southeast
late in the evening. gusts to 30 knots. a chance of snow in the
morning. rain. freezing rain late in the morning. waves 8 to
12 feet. waves occasionally around 15 feet. 
.friday...south winds 20 to 25 knots becoming west 15 to 20 knots
in the late morning and early afternoon...then decreasing to
10 to 15 knots early in the evening becoming north 15 to 20 knots
by midnight. rain likely early in the morning. waves 5 to 7 feet
subsiding to 3 to 5 feet by midnight. waves occasionally around
10 feet. 
.saturday...east winds 15 to 20 knots increasing to 20 to
25 knots in the late morning and early afternoon...then
decreasing to 15 to 20 knots early in the evening becoming south
20 to 25 knots by midnight. rain likely. waves 6 to 9 feet. waves
occasionally around 12 feet. 


$$

fzus63 kdtx 311347
glflh 
expires:202603312200;;592640

open lake forecast for lake huron
national weather service detroit/pontiac mi
947 am edt tue mar 31 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...a frontal boundary draped across central lake huron
and lower mi moves steadily south and east today and tonight. the
front is the focus for showers and thunderstorms, with the
potential for strong to severe thunderstorms. marine conditions
turn colder and remain unsettled post front highlighted by
moderate northerly wind and higher waves south half tonight and
wednesday. winds shift easterly and increase across the north
half thursday with gusts reaching up to around 30 knots as the
next low pressure system approaches the midwest.


lhz462>464-312200-
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-
947 am edt tue mar 31 2026

.rest of today...northeast winds 5 to 10 knots. scattered showers
and freezing rain likely late in the morning...then numerous
showers...possible thunderstorms and freezing rain in the
afternoon. waves 1 to 3 feet. 
.tonight...north winds 10 to 15 knots increasing to 15 to
20 knots early in the morning. numerous showers and scattered
thunderstorms in the evening. waves 1 to 3 feet building to 3 to
5 feet in the late evening and overnight. 
.wednesday...north winds 15 to 20 knots. waves 4 to 6 feet. waves
occasionally around 8 feet. 
.wednesday night...northeast winds 15 to 20 knots. a chance of
rain after midnight. waves 4 to 6 feet. waves occasionally around
8 feet. 
.thursday...east winds 15 to 20 knots becoming south 20 to
25 knots with gusts to around 30 knots late in the evening. rain.
a chance of thunderstorms late in the evening. waves 5 to 7 feet.
waves occasionally around 10 feet. 
.friday...southwest winds 15 to 20 knots with gusts to around
30 knots becoming west 10 to 15 knots early in the evening...then
veering to the north by midnight. a chance of rain by midnight.
waves 5 to 7 feet subsiding to 2 to 4 feet . waves occasionally
around 10 feet. 
.saturday...east winds 10 to 15 knots veering to the southeast
early in the evening...then becoming south 15 to 20 knots by
midnight. a chance of rain early in the morning. rain likely.
waves 4 to 6 feet. waves occasionally around 8 feet. 


$$

fzus63 kmkx 311437
glflm 
expires:202603312115;;594456

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
937 am cdt tue mar 31 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...

a slow moving cold front over central lake michigan will reach the
southern tip of the lake late this afternoon. modest to breezy
southerly winds south of the front will shift northerly and become
brisk into wednesday. breezy easterly winds are then expected 
wednesday night and thursday between high pressure of 30.7 inches 
east of james bay in canada and low pressure of 29.4 inches 
lifting from the central plains into wisconsin. gusts could 
approach gale force during this period, particularly across 
northern portions of the lake.


lmz080-669-671-673-675-777-779-870-872-874-876-878-312115-
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 am cdt tue mar 31 2026

sheboygan wi to pentwater mi south...

.rest of today...southerly winds 15 to 25 kt veering to northwest
15 to 25 kt. scattered rain showers with a chance of 
thunderstorms. waves 4 to 6 ft occasionally to 8 ft subsiding to 3
to 5 ft. 
.tonight...north winds to 30 kt. chance of rain showers and
slight chance of thunderstorms in the evening, then chance of
rain showers overnight. waves 4 to 7 ft occasionally to 9 ft.
.wednesday...northeast winds 15 to 25 kt increasing to 30 kt.
chance of rain showers in the morning, then chance of rain and
rain showers in the afternoon. waves 4 to 7 ft occasionally to
9 ft building to 5 to 8 ft occasionally to 10 ft. 
.wednesday night...northeast winds to 30 kt becoming east. rain
likely in the evening, then rain overnight. waves 6 to 9 ft
occasionally to 12 ft. 
.thursday...east winds to 30 kt becoming southeast. rain in the
morning, then rain with a chance of thunderstorms in the
afternoon. waves 6 to 9 ft occasionally to 12 ft. 
.thursday night...south winds to 30 kt becoming southwest 15 to
25 kt. rain with a chance of thunderstorms. waves 7 to 10 ft
occasionally to 13 ft. 
.friday...northwest winds 10 to 20 kt becoming north. waves 4 to
7 ft occasionally to 9 ft subsiding to 2 to 4 ft. 
.saturday...southeast winds 15 to 25 kt becoming southwest. rain.
waves 5 to 8 ft occasionally to 10 ft.  

$$

fzus63 kmkx 311437
glflm 
expires:202603312115;;594455

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
937 am cdt tue mar 31 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...

a slow moving cold front over central lake michigan will reach the
southern tip of the lake late this afternoon. modest to breezy
southerly winds south of the front will shift northerly and become
brisk into wednesday. breezy easterly winds are then expected 
wednesday night and thursday between high pressure of 30.7 inches 
east of james bay in canada and low pressure of 29.4 inches 
lifting from the central plains into wisconsin. gusts could 
approach gale force during this period, particularly across 
northern portions of the lake.


lmz261-362-364-366-563-565-567-868-312115-
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 am cdt tue mar 31 2026

sheboygan wi to pentwater mi north...

.rest of today...north winds to 30 kt diminishing to 15 to 25 kt.
scattered rain showers and slight chance of thunderstorms late
this morning, then scattered rain showers with a chance of
thunderstorms this afternoon. waves 3 to 5 ft. 
.tonight...north winds to 30 kt diminishing to 15 to 25 kt. waves
3 to 5 ft. 
.wednesday...northeast winds 15 to 25 kt increasing to 30 kt.
waves 4 to 7 ft occasionally to 9 ft building to 5 to 8 ft
occasionally to 10 ft. 
.wednesday night...northeast winds to 30 kt becoming east. chance
of snow and rain in the evening, then rain with a chance of snow
overnight. waves 6 to 9 ft occasionally to 12 ft. 
.thursday...east gales to 35 kt. rain, snow and freezing rain in
the morning, then rain and freezing rain in the afternoon. waves
7 to 10 ft occasionally to 13 ft. 
.thursday night...southeast gales to 35 kt veering to west to
30 kt. rain. waves 7 to 10 ft occasionally to 13 ft. 
.friday...west winds 15 to 25 kt becoming north 10 to 20 kt.
waves 4 to 7 ft occasionally to 9 ft subsiding to 2 to 4 ft. 
.saturday...east winds to 30 kt becoming northeast 15 to 25 kt.
rain and freezing rain likely. waves 5 to 8 ft occasionally to
10 ft.  

$$

fzus63 kmqt 311401
glfls 
expires:202603312000;;592988

open lake forecast for lake superior
national weather service marquette mi
1000 am edt tue mar 31 2026

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

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

.synopsis...

a 29.7 inch trough extending northeast from the central plains to 
lower michigan moves to southern ontario by this evening, weakening 
to 29.8 inches. meanwhile, 30.3 inch high pressure approaches from 
the northwest. 30.5 inch high pressure ridging moves over lake 
superior by wednesday morning, with the center of the high over 
james bay at 30.6 inches. by thursday morning, the high builds to 
30.8 inches over northern quebec while a 29.5 inch low lifts through 
the central plains. this low passes just south of or through lake 
superior at 29.5 inches thursday night before lifting into northern 
ontario friday morning. while this occurs, another low of 29.6 
inches develops over the central plains. this second low moves over 
lake michigan on saturday before moving through georgian bay 
saturday night.



lsz264-312000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
1000 am edt tue mar 31 2026

...gale watch in effect from thursday morning through late
thursday night...

.rest of today...east winds 15 to 25 knots backing northeast in
the afternoon, then diminishing to 10 to 20 knots late. freezing
spray by late morning. patchy fog. a chance of snow showers.
waves 4 to 7 feet occasionally to 9 feet subsiding to 3 to 6 feet
occasionally to 8 feet. 
.tonight...northeast winds 10 to 20 knots. waves subsiding to
2 to 4 feet. 
.wednesday...northeast winds 5 to 15 knots veering east in the
afternoon, then increasing to 10 to 20 knots late. waves
subsiding to 1 to 3 feet. 
.wednesday night...east winds 10 to 20 knots increasing to 15 to
25 knots after midnight. waves building to 4 to 7 feet
occasionally to 9 feet. 
.thursday...east winds 20 to 30 knots increasing to gales to
35 knots by mid afternoon. a chance of snow through early
afternoon, then snow, possibly mixed with freezing rain by mid
afternoon. waves building to 9 to 12 feet occasionally to
15 feet. 
.thursday night...northeast gales to 35 knots diminishing to
20 to 30 knots after midnight. snow. waves building to 10 to
14 feet occasionally to 18 feet, then subsiding to 6 to 9 feet
occasionally to 11 feet. 
.friday...north winds 15 to 25 knots becoming east gales to
35 knots. a chance of snow. a chance of rain showers. waves
subsiding to 3 to 5 feet occasionally to 7 feet, then building to
7 to 10 feet occasionally to 13 feet. 
.saturday...east gales to 35 knots backing north. snow showers,
possibly mixed with rain, then a chance of snow showers. waves
building to 8 to 11 feet occasionally to 14 feet, then subsiding
to 6 to 9 feet occasionally to 11 feet. 

$$

fzus63 kmqt 311401
glfls 
expires:202603312000;;592989

open lake forecast for lake superior
national weather service marquette mi
1000 am edt tue mar 31 2026

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

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

.synopsis...

a 29.7 inch trough extending northeast from the central plains to 
lower michigan moves to southern ontario by this evening, weakening 
to 29.8 inches. meanwhile, 30.3 inch high pressure approaches from 
the northwest. 30.5 inch high pressure ridging moves over lake 
superior by wednesday morning, with the center of the high over 
james bay at 30.6 inches. by thursday morning, the high builds to 
30.8 inches over northern quebec while a 29.5 inch low lifts through 
the central plains. this low passes just south of or through lake 
superior at 29.5 inches thursday night before lifting into northern 
ontario friday morning. while this occurs, another low of 29.6 
inches develops over the central plains. this second low moves over 
lake michigan on saturday before moving through georgian bay 
saturday night.



lsz265-312000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
1000 am edt tue mar 31 2026

...gale watch in effect from thursday morning through late
thursday night...

.rest of today...east winds 15 to 25 knots becoming northeast
10 to 20 knots late. patchy fog. a chance of freezing rain by
late morning. a chance of snow showers. waves 4 to 7 feet
occasionally to 9 feet subsiding to 3 to 5 feet occasionally to
7 feet. 
.tonight...north winds 15 to 25 knots. waves 3 to 5 feet
occasionally to 7 feet. 
.wednesday...northeast winds 10 to 20 knots veering east in the
afternoon. waves subsiding to 2 to 4 feet. 
.wednesday night...east winds 15 to 25 knots increasing to 20 to
30 knots after midnight. a slight chance of snow after midnight.
waves building to 5 to 8 feet occasionally to 10 feet. 
.thursday...east gales to 40 knots. freezing spray through early
afternoon. snow likely through early afternoon, then snow,
possibly mixed with freezing rain by mid afternoon. waves
building to 9 to 12 feet occasionally to 15 feet. 
.thursday night...east gales to 35 knots becoming north 20 to
30 knots after midnight. snow, possibly mixed with rain through
midnight, then a chance of snow, possibly mixed with rain after
midnight. waves subsiding to 5 to 8 feet occasionally to 10 feet.
.friday...north winds 15 to 25 knots becoming east gales to
35 knots. a chance of snow, possibly mixed with rain. a chance of
freezing rain. waves subsiding to 3 to 5 feet occasionally to
7 feet, then building to 7 to 10 feet occasionally to 13 feet. 
.saturday...east gales to 35 knots backing north. freezing rain
likely. rain and snow showers likely. waves building to 8 to
11 feet occasionally to 14 feet, then subsiding to 6 to 9 feet
occasionally to 11 feet. 

$$

fzus63 kmqt 311401
glfls 
expires:202603312000;;592990

open lake forecast for lake superior
national weather service marquette mi
1000 am edt tue mar 31 2026

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

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

.synopsis...

a 29.7 inch trough extending northeast from the central plains to 
lower michigan moves to southern ontario by this evening, weakening 
to 29.8 inches. meanwhile, 30.3 inch high pressure approaches from 
the northwest. 30.5 inch high pressure ridging moves over lake 
superior by wednesday morning, with the center of the high over 
james bay at 30.6 inches. by thursday morning, the high builds to 
30.8 inches over northern quebec while a 29.5 inch low lifts through 
the central plains. this low passes just south of or through lake 
superior at 29.5 inches thursday night before lifting into northern 
ontario friday morning. while this occurs, another low of 29.6 
inches develops over the central plains. this second low moves over 
lake michigan on saturday before moving through georgian bay 
saturday night.



lsz266-312000-
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 tue mar 31 2026

...gale watch in effect from thursday morning through late
thursday night...

.rest of today...east winds 20 to 30 knots diminishing to 15 to
25 knots in the afternoon, then backing northeast late. patchy
fog. snow showers likely by late morning. a chance of freezing
rain. a chance of snow showers by mid afternoon. waves 5 to
8 feet occasionally to 10 feet subsiding to 3 to 5 feet
occasionally to 7 feet. 
.tonight...north winds 15 to 25 knots veering northeast late. a
slight chance of snow showers through midnight. waves 3 to 5 feet
occasionally to 7 feet. 
.wednesday...northeast winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon. waves subsiding to 2 to 4 feet. 
.wednesday night...east winds 15 to 25 knots increasing to 20 to
30 knots after midnight. a slight chance of snow after midnight.
waves building to 5 to 8 feet occasionally to 10 feet. 
.thursday...east gales to 35 knots. snow likely through early
afternoon. a slight chance of freezing rain. snow by mid
afternoon. waves building to 9 to 12 feet occasionally to
15 feet. 
.thursday night...east gales to 35 knots becoming northeast 20 to
30 knots after midnight. snow, possibly mixed with rain and
freezing rain through midnight, then a chance of rain and snow
after midnight. waves subsiding to 5 to 8 feet occasionally to
10 feet. 
.friday...north winds 15 to 25 knots becoming east gales to
35 knots. a chance of snow, possibly mixed with rain. a chance of
freezing rain. waves subsiding to 3 to 5 feet occasionally to
7 feet, then building to 7 to 10 feet occasionally to 13 feet. 
.saturday...east gales to 35 knots becoming north gales to
40 knots. rain and snow showers likely, possibly mixed with
freezing rain, then a chance of rain and snow showers. waves
building to 8 to 11 feet occasionally to 14 feet, then subsiding
to 6 to 9 feet occasionally to 11 feet. 

$$

fzus63 kmqt 311401
glfls 
expires:202603312000;;592991

open lake forecast for lake superior
national weather service marquette mi
1000 am edt tue mar 31 2026

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

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

.synopsis...

a 29.7 inch trough extending northeast from the central plains to 
lower michigan moves to southern ontario by this evening, weakening 
to 29.8 inches. meanwhile, 30.3 inch high pressure approaches from 
the northwest. 30.5 inch high pressure ridging moves over lake 
superior by wednesday morning, with the center of the high over 
james bay at 30.6 inches. by thursday morning, the high builds to 
30.8 inches over northern quebec while a 29.5 inch low lifts through 
the central plains. this low passes just south of or through lake 
superior at 29.5 inches thursday night before lifting into northern 
ontario friday morning. while this occurs, another low of 29.6 
inches develops over the central plains. this second low moves over 
lake michigan on saturday before moving through georgian bay 
saturday night.



lsz267-312000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
1000 am edt tue mar 31 2026

...gale watch in effect from thursday morning through late
thursday night...

.rest of today...east winds 15 to 25 knots becoming northeast
10 to 20 knots late. patchy fog. rain showers likely, possibly
mixed with freezing rain by late morning. a chance of snow
showers. a chance of rain showers by mid afternoon. waves 3 to
6 feet occasionally to 8 feet subsiding to 2 to 4 feet. 
.tonight...north winds 10 to 20 knots increasing to 15 to
25 knots after midnight, then veering northeast late. a slight
chance of snow showers through midnight. waves building to 3 to
5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. 
.wednesday...northeast winds 10 to 20 knots. waves subsiding to
1 to 3 feet. 
.wednesday night...east winds 15 to 25 knots. a slight chance of
snow after midnight. waves building to 3 to 5 feet occasionally
to 7 feet. 
.thursday...east winds 20 to 30 knots increasing to gales to
35 knots by mid afternoon. snow. rain by mid afternoon. waves
building to 5 to 8 feet occasionally to 10 feet. 
.thursday night...east gales to 35 knots becoming northeast 20 to
30 knots after midnight. rain. waves subsiding to 3 to 5 feet
occasionally to 7 feet. 
.friday...north winds 15 to 25 knots becoming east 20 to
30 knots. a chance of rain and snow. a chance of freezing rain.
waves subsiding to 2 to 4 feet, then building to 4 to 7 feet
occasionally to 9 feet. 
.saturday...east winds 20 to 30 knots becoming north gales to
35 knots. freezing rain likely. rain and snow showers likely.
waves subsiding to 3 to 6 feet occasionally to 8 feet, then
building to 8 to 11 feet occasionally to 14 feet. 

$$

fzus63 kmqt 311401
glfls 
expires:202603312000;;592986

open lake forecast for lake superior
national weather service marquette mi
1000 am edt tue mar 31 2026

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

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

.synopsis...

a 29.7 inch trough extending northeast from the central plains to 
lower michigan moves to southern ontario by this evening, weakening 
to 29.8 inches. meanwhile, 30.3 inch high pressure approaches from 
the northwest. 30.5 inch high pressure ridging moves over lake 
superior by wednesday morning, with the center of the high over 
james bay at 30.6 inches. by thursday morning, the high builds to 
30.8 inches over northern quebec while a 29.5 inch low lifts through 
the central plains. this low passes just south of or through lake 
superior at 29.5 inches thursday night before lifting into northern 
ontario friday morning. while this occurs, another low of 29.6 
inches develops over the central plains. this second low moves over 
lake michigan on saturday before moving through georgian bay 
saturday night.



lsz162-312000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 am edt tue mar 31 2026 /900 am cdt tue mar 31 2026/

...gale watch in effect from thursday morning through late
thursday night...

.rest of today...northeast winds 15 to 25 knots diminishing to
10 to 20 knots late. patchy fog by late morning. a slight chance
of rain showers by late morning. a slight chance of snow showers.
waves 4 to 7 feet occasionally to 9 feet subsiding to 3 to 5 feet
occasionally to 7 feet. 
.tonight...northeast winds 10 to 20 knots increasing to 15 to
25 knots late. a slight chance of snow showers through midnight.
waves subsiding to 2 to 4 feet. 
.wednesday...east winds 15 to 25 knots. a slight chance of snow
showers by mid afternoon. waves building to 4 to 7 feet
occasionally to 9 feet. 
.wednesday night...east winds 20 to 30 knots. a slight chance of
snow. waves building to 4 to 8 feet occasionally to 10 feet. 
.thursday...east gales to 35 knots becoming northeast gales to
40 knots by mid afternoon. snow. waves building to 11 to 15 feet
occasionally to 19 feet. 
.thursday night...northeast gales to 40 knots becoming north
20 to 30 knots after midnight. snow through midnight, then a
chance of snow after midnight. waves subsiding to 5 to 8 feet
occasionally to 10 feet. 
.friday...northeast winds 10 to 20 knots becoming east gales to
35 knots. a chance of snow. rain showers likely. waves subsiding
to 2 to 4 feet, then building to 8 to 11 feet occasionally to
14 feet. 
.saturday...northeast winds 20 to 30 knots backing north. snow
showers, possibly mixed with rain, then a chance of snow showers.
waves building to 9 to 12 feet occasionally to 15 feet, then
subsiding to 4 to 7 feet occasionally to 9 feet. 

$$

fzus63 kmqt 311401
glfls 
expires:202603312000;;592987

open lake forecast for lake superior
national weather service marquette mi
1000 am edt tue mar 31 2026

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

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

.synopsis...

a 29.7 inch trough extending northeast from the central plains to 
lower michigan moves to southern ontario by this evening, weakening 
to 29.8 inches. meanwhile, 30.3 inch high pressure approaches from 
the northwest. 30.5 inch high pressure ridging moves over lake 
superior by wednesday morning, with the center of the high over 
james bay at 30.6 inches. by thursday morning, the high builds to 
30.8 inches over northern quebec while a 29.5 inch low lifts through 
the central plains. this low passes just south of or through lake 
superior at 29.5 inches thursday night before lifting into northern 
ontario friday morning. while this occurs, another low of 29.6 
inches develops over the central plains. this second low moves over 
lake michigan on saturday before moving through georgian bay 
saturday night.



lsz263-312000-
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 tue mar 31 2026

...gale watch in effect from thursday morning through late
thursday night...

.rest of today...northeast winds 15 to 25 knots diminishing to
10 to 20 knots late. patchy fog by late morning. a slight chance
of rain showers by late morning. a chance of snow showers. waves
4 to 7 feet occasionally to 9 feet subsiding to 3 to 6 feet
occasionally to 8 feet. 
.tonight...northeast winds 10 to 20 knots diminishing to 5 to
15 knots late. waves subsiding to 2 to 4 feet. 
.wednesday...northeast winds 10 to 20 knots veering east in the
afternoon, then increasing to 15 to 25 knots late. a slight
chance of snow showers by mid afternoon. waves building to 3 to
6 feet occasionally to 8 feet. 
.wednesday night...east winds 15 to 25 knots. a slight chance of
snow after midnight. waves building to 4 to 7 feet occasionally
to 9 feet. 
.thursday...east gales to 40 knots. snow likely through early
afternoon, then snow, possibly mixed with rain by mid afternoon.
waves building to 10 to 14 feet occasionally to 18 feet. 
.thursday night...northeast gales to 40 knots becoming north
20 to 30 knots after midnight. snow through midnight. a chance of
snow after midnight. waves subsiding to 6 to 9 feet occasionally
to 11 feet. 
.friday...northeast winds 15 to 25 knots becoming east gales to
35 knots. a chance of snow. a chance of rain showers. waves
subsiding to 3 to 5 feet occasionally to 7 feet, then building to
8 to 11 feet occasionally to 14 feet. 
.saturday...northeast winds 20 to 30 knots becoming north gales
to 35 knots. snow showers, possibly mixed with rain, then a
chance of snow showers. waves building to 9 to 12 feet
occasionally to 15 feet, then subsiding to 6 to 9 feet
occasionally to 11 feet. 

$$