fzus63 kdtx 191939
glflh 
expires:202603200400;;968947

open lake forecast for lake huron
national weather service detroit/pontiac mi
339 pm edt thu mar 19 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 weakening cold front and diffuse pressure pattern
dominate the great lakes today, followed by a compact clipper
that tracks through friday morning. weak high pressure on
saturday before a strong cold front sinks across the region with
gusty northeast wind on sunday. stronger high pressure follows on
monday with another cold front expected tuesday.


lhz361-362-200400-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
lake huron from presque isle light to sturgeon point mi beyond
5nm off shore-
339 pm edt thu mar 19 2026

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

wave heights are for ice free areas.

$$

fzus63 kdtx 191939
glflh 
expires:202603200400;;968948

open lake forecast for lake huron
national weather service detroit/pontiac mi
339 pm edt thu mar 19 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 weakening cold front and diffuse pressure pattern
dominate the great lakes today, followed by a compact clipper
that tracks through friday morning. weak high pressure on
saturday before a strong cold front sinks across the region with
gusty northeast wind on sunday. stronger high pressure follows on
monday with another cold front expected tuesday.


lhz363-462>464-200400-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
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-
339 pm edt thu mar 19 2026

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


$$

fzus63 kmkx 191939
glflm 
expires:202603200315;;968941

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
239 pm cdt thu mar 19 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 of 30.2 inches will keep winds light and variable
through this evening, with southeasterly winds developing late
tonight as low pressure around 29.7 inches progresses east into
lake superior. winds will shift to northwesterly as low pressure
exits eastward friday morning. winds shift northeasterly as high
pressure of 30.2 inches builds into ontario friday night. low
pressure then develops in the lee of the wyoming rockies
saturday morning, shifting winds to southeasterly and allowing
them to increase as low pressure progresses eastward saturday
night. low pressure crosses northern illinois into southern
lower michigan as it deepens to 29.4 inches, leading to
northerly winds backing to northwesterly sunday into sunday 
night. gales are possible during this timeframe. high pressure
with lighter winds then dominate on monday.


lmz261-362-364-366-563-565-567-868-200315-
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-
239 pm cdt thu mar 19 2026

sheboygan wi to pentwater mi north...

.tonight...southeast winds 5 to 10 kt increasing to 10 to 15 kt
late this evening, then becoming south 10 to 20 kt after midnight
becoming southwest late. slight chance of light freezing rain
this evening, then chance of rain showers and freezing rain
overnight. patchy fog overnight. waves 1 to 2 ft building to 2 to
4 ft. 
.friday...west winds 10 to 15 kt becoming north. patchy fog in
the morning. slight chance of light freezing rain in the morning.
waves 2 to 4 ft. 
.friday night...north winds 5 to 10 kt backing to southwest.
waves 1 to 3 ft subsiding to 1 ft or less. 
.saturday...south winds 10 to 15 kt. waves 1 to 3 ft. 
.saturday night...east winds 10 to 15 kt becoming northeast 10 to
20 kt. chance of rain and snow. waves 1 to 3 ft building to 3 to
5 ft. 
.sunday...northeast winds 15 to 25 kt increasing to 30 kt. chance
of rain and snow in the morning, then chance of rain in the
afternoon. waves 4 to 6 ft occasionally to 8 ft building to 5 to
8 ft occasionally to 10 ft. 
.sunday night...north winds to 30 kt diminishing to 15 to 25 kt.
waves 7 to 10 ft occasionally to 13 ft. 
.monday...north winds 15 to 25 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. 
.tuesday...southwest winds to 30 kt diminishing to 15 to 25 kt.
waves 5 to 8 ft occasionally to 10 ft.  

$$

fzus63 kmkx 191939
glflm 
expires:202603200315;;968942

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
239 pm cdt thu mar 19 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 of 30.2 inches will keep winds light and variable
through this evening, with southeasterly winds developing late
tonight as low pressure around 29.7 inches progresses east into
lake superior. winds will shift to northwesterly as low pressure
exits eastward friday morning. winds shift northeasterly as high
pressure of 30.2 inches builds into ontario friday night. low
pressure then develops in the lee of the wyoming rockies
saturday morning, shifting winds to southeasterly and allowing
them to increase as low pressure progresses eastward saturday
night. low pressure crosses northern illinois into southern
lower michigan as it deepens to 29.4 inches, leading to
northerly winds backing to northwesterly sunday into sunday 
night. gales are possible during this timeframe. high pressure
with lighter winds then dominate on monday.


lmz080-669-671-673-675-777-779-870-872-874-876-878-200315-
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-
239 pm cdt thu mar 19 2026

sheboygan wi to pentwater mi south...

.tonight...east winds 5 to 10 kt becoming southeast 10 to 15 kt
late this evening, then becoming south 10 to 20 kt after midnight
becoming southwest late. waves 1 to 2 ft building to 2 to 4 ft. 
.friday...southwest winds 10 to 20 kt veering to north. waves
2 to 4 ft. 
.friday night...north winds 10 to 15 kt veering to southeast.
patchy fog overnight. waves 1 to 3 ft subsiding to 1 to 2 ft.
.saturday...south winds 10 to 15 kt. waves 1 to 3 ft. 
.saturday night...south winds 10 to 15 kt becoming west 10 to
20 kt. waves 1 to 3 ft building to 3 to 5 ft. 
.sunday...north winds 15 to 25 kt increasing to 30 kt. waves 4 to
6 ft occasionally to 8 ft building to 6 to 9 ft occasionally to
12 ft. 
.sunday night...north winds to 30 kt. waves 8 to 11 ft
occasionally to 14 ft. 
.monday...north winds 15 to 25 kt diminishing to 10 to 20 kt.
waves 8 to 11 ft occasionally to 14 ft subsiding to 5 to 8 ft
occasionally to 10 ft. 
.tuesday...south winds 15 to 25 kt. waves 4 to 7 ft occasionally
to 9 ft.  

$$

fzus63 kmqt 192001
glfls 
expires:202603200800;;969562

open lake forecast for lake superior
national weather service marquette mi
400 pm edt thu mar 19 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...

weak ridging around 30.1 inches over lake superior this afternoon 
gives way a clipper low moving across the lake tonight into early 
friday at around 29.7 inches. while another low moves through 
northern ontario toward the north shores of lake superior friday 
night, another low stretches into the northern plains around the 
same time. together, these lows are expected to bring about 
troughing of around around 29.8 inch over lake superior on saturday 
into sunday. behind the troughing, 30.4 inch ridging builds into the 
great lakes and northern plains by monday. a 29.9 inch clipper low 
tracking across northern ontario on tuesday briefly extends a 30.0 
inch trough over the lake. a 30.5 inch high quickly follows behind 
it for wednesday.



lsz162-200800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 pm edt thu mar 19 2026 /300 pm cdt thu mar 19 2026/

.late this afternoon...east winds 10 to 20 knots. a slight chance
of rain and snow showers. waves calm to 2 feet. 
.tonight...east winds 10 to 20 knots veering southwest after
midnight, then veering west late. a chance of freezing rain, snow
and rain showers through midnight. waves calm to 2 feet. 
.friday...west winds 5 to 15 knots. waves calm to 2 feet. 
.friday night...west winds 5 to 15 knots veering northeast late.
waves calm to 2 feet. 
.saturday...east winds 5 to 15 knots becoming northeast 10 to
20 knots by mid afternoon. a chance of rain and snow showers.
waves building to 1 to 3 feet. 
.saturday night...northeast winds 15 to 25 knots. a chance of
snow showers, possibly mixed with rain. waves building to 4 to
7 feet occasionally to 9 feet. 
.sunday...northeast winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. a chance of snow showers. waves
subsiding to 3 to 5 feet occasionally to 7 feet. 
.sunday night...northeast winds 10 to 20 knots becoming northwest
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.monday...southwest winds 5 to 15 knots increasing to 20 to
30 knots. waves building to 3 to 5 feet occasionally to 7 feet. 
.tuesday...west winds 15 to 25 knots becoming northeast 10 to
20 knots. waves subsiding to calm to 2 feet, then building to
3 to 5 feet occasionally to 7 feet. 

$$

fzus63 kmqt 192001
glfls 
expires:202603200800;;969563

open lake forecast for lake superior
national weather service marquette mi
400 pm edt thu mar 19 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...

weak ridging around 30.1 inches over lake superior this afternoon 
gives way a clipper low moving across the lake tonight into early 
friday at around 29.7 inches. while another low moves through 
northern ontario toward the north shores of lake superior friday 
night, another low stretches into the northern plains around the 
same time. together, these lows are expected to bring about 
troughing of around around 29.8 inch over lake superior on saturday 
into sunday. behind the troughing, 30.4 inch ridging builds into the 
great lakes and northern plains by monday. a 29.9 inch clipper low 
tracking across northern ontario on tuesday briefly extends a 30.0 
inch trough over the lake. a 30.5 inch high quickly follows behind 
it for wednesday.



lsz263-200800-
lake superior from saxon harbor wi to upper entrance to portage
canal mi 5nm off shore to the us/canadian border including isle
royale national park-
400 pm edt thu mar 19 2026

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

$$

fzus63 kmqt 192001
glfls 
expires:202603200800;;969564

open lake forecast for lake superior
national weather service marquette mi
400 pm edt thu mar 19 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...

weak ridging around 30.1 inches over lake superior this afternoon 
gives way a clipper low moving across the lake tonight into early 
friday at around 29.7 inches. while another low moves through 
northern ontario toward the north shores of lake superior friday 
night, another low stretches into the northern plains around the 
same time. together, these lows are expected to bring about 
troughing of around around 29.8 inch over lake superior on saturday 
into sunday. behind the troughing, 30.4 inch ridging builds into the 
great lakes and northern plains by monday. a 29.9 inch clipper low 
tracking across northern ontario on tuesday briefly extends a 30.0 
inch trough over the lake. a 30.5 inch high quickly follows behind 
it for wednesday.



lsz264-200800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
400 pm edt thu mar 19 2026

.late this afternoon...southeast winds 5 to 15 knots. a slight
chance of snow showers. waves calm to 2 feet. 
.tonight...southeast winds 15 to 25 knots veering south after
midnight, then becoming west 10 to 20 knots late. snow showers
through midnight. a chance of rain showers. a chance of snow
showers after midnight. waves building to 3 to 5 feet
occasionally to 7 feet. 
.friday...north winds 5 to 15 knots backing west late. waves
subsiding to calm to 2 feet. 
.friday night...west winds 5 to 15 knots veering north late.
waves calm to 2 feet. 
.saturday...east winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. a chance of rain showers through early
afternoon. a chance of snow showers. waves building to 1 to
3 feet. 
.saturday night...northeast winds 15 to 25 knots increasing to
20 to 30 knots after midnight. a chance of snow showers. freezing
spray after midnight. waves building to 5 to 8 feet occasionally
to 10 feet. 
.sunday...northeast winds 20 to 30 knots diminishing to 15 to
25 knots by mid afternoon. freezing spray. waves subsiding to
3 to 5 feet occasionally to 7 feet. 
.sunday night...northeast winds 5 to 15 knots backing north after
midnight. waves subsiding to 2 to 4 feet. 
.monday...northwest winds 5 to 15 knots becoming southwest gales
to 35 knots. waves subsiding to calm to 2 feet, then building to
6 to 9 feet occasionally to 11 feet. 
.tuesday...west gales to 35 knots becoming northeast 20 to
30 knots. freezing spray. waves subsiding to 3 to 5 feet
occasionally to 7 feet, then building to 5 to 8 feet occasionally
to 10 feet. 

$$

fzus63 kmqt 192001
glfls 
expires:202603200800;;969565

open lake forecast for lake superior
national weather service marquette mi
400 pm edt thu mar 19 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...

weak ridging around 30.1 inches over lake superior this afternoon 
gives way a clipper low moving across the lake tonight into early 
friday at around 29.7 inches. while another low moves through 
northern ontario toward the north shores of lake superior friday 
night, another low stretches into the northern plains around the 
same time. together, these lows are expected to bring about 
troughing of around around 29.8 inch over lake superior on saturday 
into sunday. behind the troughing, 30.4 inch ridging builds into the 
great lakes and northern plains by monday. a 29.9 inch clipper low 
tracking across northern ontario on tuesday briefly extends a 30.0 
inch trough over the lake. a 30.5 inch high quickly follows behind 
it for wednesday.



lsz265-200800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
400 pm edt thu mar 19 2026

.late this afternoon...southeast winds 10 to 20 knots. a slight
chance of snow showers. waves calm to 2 feet. 
.tonight...southeast winds 15 to 25 knots increasing to 20 to
30 knots after midnight, then becoming west 15 to 25 knots late.
rain showers likely, possibly mixed with freezing rain through
midnight. snow showers. a chance of rain showers after midnight.
waves building to 3 to 5 feet occasionally to 7 feet, then
subsiding to 1 to 3 feet. 
.friday...northwest winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon, then backing west late. waves
subsiding to calm to 2 feet. 
.friday night...west winds 10 to 20 knots. waves calm to 2 feet. 
.saturday...east winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. a slight chance of rain showers
through early afternoon. a chance of snow showers. waves building
to 1 to 3 feet. 
.saturday night...northeast winds 20 to 30 knots. a chance of
snow showers. waves building to 5 to 8 feet occasionally to
10 feet. 
.sunday...northeast gales to 35 knots diminishing to 20 to
30 knots by mid afternoon. freezing spray through early
afternoon. a chance of snow showers. waves building to 6 to
9 feet occasionally to 11 feet, then subsiding to 4 to 7 feet
occasionally to 9 feet. 
.sunday night...north winds 15 to 25 knots. waves subsiding to
3 to 6 feet occasionally to 8 feet. 
.monday...northwest winds 10 to 20 knots becoming southwest gales
to 35 knots. waves subsiding to calm to 2 feet, then building to
4 to 7 feet occasionally to 9 feet. 
.tuesday...west gales to 35 knots becoming northwest 20 to
30 knots. freezing spray. waves subsiding to 2 to 4 feet, then
building to 6 to 9 feet occasionally to 11 feet. 

$$

fzus63 kmqt 192001
glfls 
expires:202603200800;;969566

open lake forecast for lake superior
national weather service marquette mi
400 pm edt thu mar 19 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...

weak ridging around 30.1 inches over lake superior this afternoon 
gives way a clipper low moving across the lake tonight into early 
friday at around 29.7 inches. while another low moves through 
northern ontario toward the north shores of lake superior friday 
night, another low stretches into the northern plains around the 
same time. together, these lows are expected to bring about 
troughing of around around 29.8 inch over lake superior on saturday 
into sunday. behind the troughing, 30.4 inch ridging builds into the 
great lakes and northern plains by monday. a 29.9 inch clipper low 
tracking across northern ontario on tuesday briefly extends a 30.0 
inch trough over the lake. a 30.5 inch high quickly follows behind 
it for wednesday.



lsz266-200800-
lake superior east of a line from manitou island to marquette mi
and west of a line from grand marais mi to the us/canadian border
beyond 5nm from shore-
400 pm edt thu mar 19 2026

.late this afternoon...southeast winds 5 to 15 knots. a slight
chance of snow showers. waves calm to 2 feet. 
.tonight...southeast winds 15 to 25 knots increasing to 20 to
30 knots after midnight, then becoming south 15 to 25 knots late.
a slight chance of freezing rain through midnight. snow showers.
a slight chance of rain showers after midnight. waves building to
3 to 6 feet occasionally to 8 feet. 
.friday...northwest winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon. waves subsiding to calm to 2 feet. 
.friday night...west winds 10 to 20 knots veering northwest late.
waves calm to 2 feet. 
.saturday...southeast winds 10 to 20 knots becoming east 15 to
25 knots by mid afternoon. a chance of rain showers through early
afternoon. a chance of snow showers. waves building to 1 to
3 feet. 
.saturday night...east winds 15 to 25 knots becoming northeast
20 to 30 knots after midnight. a chance of snow showers. waves
building to 5 to 8 feet occasionally to 10 feet. 
.sunday...northeast gales to 35 knots diminishing to 20 to
30 knots by mid afternoon. freezing spray through early
afternoon. a chance of snow showers. waves building to 6 to
9 feet occasionally to 11 feet, then subsiding to 4 to 7 feet
occasionally to 9 feet. 
.sunday night...northeast winds 15 to 25 knots backing north
after midnight. waves subsiding to 3 to 6 feet occasionally to
8 feet. 
.monday...northwest winds 10 to 20 knots becoming south gales to
40 knots. waves subsiding to 1 to 3 feet, then building to 9 to
12 feet occasionally to 15 feet. 
.tuesday...west gales to 40 knots becoming north 20 to 30 knots.
freezing spray. waves subsiding to 5 to 8 feet occasionally to
10 feet, then building to 6 to 9 feet occasionally to 11 feet. 

$$

fzus63 kmqt 192001
glfls 
expires:202603200800;;969567

open lake forecast for lake superior
national weather service marquette mi
400 pm edt thu mar 19 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...

weak ridging around 30.1 inches over lake superior this afternoon 
gives way a clipper low moving across the lake tonight into early 
friday at around 29.7 inches. while another low moves through 
northern ontario toward the north shores of lake superior friday 
night, another low stretches into the northern plains around the 
same time. together, these lows are expected to bring about 
troughing of around around 29.8 inch over lake superior on saturday 
into sunday. behind the troughing, 30.4 inch ridging builds into the 
great lakes and northern plains by monday. a 29.9 inch clipper low 
tracking across northern ontario on tuesday briefly extends a 30.0 
inch trough over the lake. a 30.5 inch high quickly follows behind 
it for wednesday.



lsz267-200800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
400 pm edt thu mar 19 2026

.late this afternoon...southeast winds 5 to 15 knots. waves calm
to 2 feet. 
.tonight...southeast winds 10 to 20 knots becoming south 15 to
25 knots late. snow showers. a slight chance of rain showers
after midnight. waves building to 2 to 4 feet, then subsiding to
1 to 3 feet. 
.friday...northwest winds 10 to 20 knots. waves subsiding to calm
to 2 feet. 
.friday night...west winds 10 to 20 knots. waves calm to 2 feet. 
.saturday...southeast winds 10 to 20 knots backing east by mid
afternoon. a chance of snow showers. waves building to 1 to
3 feet, then subsiding to calm to 2 feet. 
.saturday night...east winds 15 to 25 knots becoming northeast
20 to 30 knots after midnight. a chance of snow showers. waves
building to 3 to 6 feet occasionally to 8 feet. 
.sunday...northeast winds 20 to 30 knots diminishing to 15 to
25 knots by mid afternoon. freezing spray through early
afternoon. a chance of snow showers. waves subsiding to 3 to
5 feet occasionally to 7 feet. 
.sunday night...northeast winds 15 to 25 knots becoming north
10 to 20 knots after midnight. waves subsiding to 2 to 4 feet,
then building to 3 to 5 feet occasionally to 7 feet. 
.monday...north winds 10 to 20 knots becoming south gales to
35 knots. freezing spray. a chance of snow showers. waves
subsiding to calm to 2 feet, then building to 7 to 10 feet
occasionally to 13 feet. 
.tuesday...west gales to 35 knots becoming northwest 15 to
25 knots. a chance of snow showers. freezing spray. waves
building to 9 to 12 feet occasionally to 15 feet, then subsiding
to 4 to 7 feet occasionally to 9 feet. 

$$