fzus63 kdtx 230317
glflh 
expires:202512231130;;059188

open lake forecast for lake huron
national weather service detroit/pontiac mi
1017 pm est mon dec 22 2025

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...low pressure, 29.80 inches, will then travel from west
to east across lake superior this morning. passage of this system
will veer wind direction to the northwest and will increase wind
speeds across the northern half of lake huron, bringing gust to
gales. high pressure, 30.40 inches, then quickly fills in across
the great lakes early tomorrow morning.


lhz363-462-231130-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
lake huron from port austin to harbor beach beyond 5nm off shore-
1017 pm est mon dec 22 2025

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


$$

fzus63 kdtx 230317
glflh 
expires:202512231130;;059187

open lake forecast for lake huron
national weather service detroit/pontiac mi
1017 pm est mon dec 22 2025

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...low pressure, 29.80 inches, will then travel from west
to east across lake superior this morning. passage of this system
will veer wind direction to the northwest and will increase wind
speeds across the northern half of lake huron, bringing gust to
gales. high pressure, 30.40 inches, then quickly fills in across
the great lakes early tomorrow morning.


lhz361-362-231130-
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-
1017 pm est mon dec 22 2025

...gale warning in effect from tuesday afternoon through tuesday
evening...

.rest of tonight...south winds 15 to 20 knots decreasing to 10 to
15 knots early in the morning. a chance of snow and rain. waves
4 to 6 feet. waves occasionally around 8 feet. 
.tuesday...southwest winds 10 to 15 knots becoming west 15 to
20 knots early in the afternoon...then increasing to 20 to
25 knots with gusts to around 30 knots late in the afternoon. a
chance of rain and snow in the morning. waves 3 to 5 feet
building to 6 to 9 feet late in the afternoon. waves occasionally
around 12 feet. 
.tuesday night...northwest winds to 30 knots with gusts to
35 knot gales decreasing to 15 to 20 knots after midnight. waves
10 to 14 feet. waves occasionally around 18 feet. 
.wednesday...north winds 5 to 10 knots veering to the south early
in the afternoon. waves 5 to 7 feet subsiding to 1 to 3 feet.
waves occasionally around 10 feet. 
.wednesday night...south winds 10 to 15 knots veering to the west
after midnight. waves 1 to 3 feet. 
.thursday...north winds 10 to 15 knots becoming east 15 to
20 knots late in the afternoon...then increasing to 20 to
25 knots late in the evening. a chance of snow late in the
evening. waves 1 to 3 feet building to 5 to 7 feet. waves
occasionally around 10 feet. 
.friday...east winds 20 to 25 knots with gusts to around 30 knots
decreasing to 10 to 15 knots. snow likely early in the morning. a
chance of rain until early evening. a chance of snow early in the
evening. waves 6 to 9 feet. waves occasionally around 12 feet. 
.saturday...southeast winds 10 to 15 knots becoming south 15 to
20 knots by midnight. a chance of rain and snow by midnight.
waves 3 to 5 feet. 


$$

fzus63 kmkx 230226
glflm 
expires:202512231015;;057083

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
826 pm cst mon dec 22 2025

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...

south winds this evening will shift southwest later tonight and 
west on tuesday, as low pressure around 29.8 inches moves into 
ontario. winds will shift west northwest by tuesday afternoon, as 
high pressure around 30.4 inches moves from north dakota into 
northern minnesota. winds will subside tuesday night, as the high 
crosses lake michigan. these winds will shift out of the southeast
wednesday, as the high moves east of the region.

another stronger high around 30.5 inches will move east across 
southern manitoba into ontario wednesday night into christmas day,
with winds steadily increasing out of the northeast to east.


lmz080-669-671-673-675-777-779-870-872-874-876-878-231015-
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-
826 pm cst mon dec 22 2025

sheboygan wi to pentwater mi south...

.rest of tonight...south winds 15 to 25 kt becoming southwest
10 to 20 kt. chance of drizzle through early evening, then slight
chance of drizzle overnight. waves 4 to 6 ft occasionally to
8 ft. 
.tuesday...west winds 10 to 20 kt becoming northwest. waves 3 to
5 ft. 
.tuesday night...northwest winds 10 to 20 kt veering to northeast
10 to 15 kt. waves 3 to 5 ft subsiding to 2 to 4 ft. 
.wednesday...southeast winds 10 to 20 kt. waves 2 to 4 ft. 
.wednesday night...south winds 10 to 15 kt veering to northwest.
chance of rain in the evening. waves 2 to 4 ft subsiding to 1 to
3 ft. 
.thursday...northeast winds 10 to 15 kt becoming east 10 to
20 kt. waves 2 to 4 ft. 
.thursday night...east winds 15 to 25 kt becoming southeast.
rain. waves 4 to 6 ft occasionally to 8 ft. 
.friday...southeast winds 10 to 20 kt becoming northeast. chance
of rain. waves 4 to 6 ft occasionally to 8 ft. 
.saturday...southeast winds 10 to 20 kt. waves 2 to 4 ft.  

$$

fzus63 kmkx 230226
glflm 
expires:202512231015;;057082

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
826 pm cst mon dec 22 2025

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...

south winds this evening will shift southwest later tonight and 
west on tuesday, as low pressure around 29.8 inches moves into 
ontario. winds will shift west northwest by tuesday afternoon, as 
high pressure around 30.4 inches moves from north dakota into 
northern minnesota. winds will subside tuesday night, as the high 
crosses lake michigan. these winds will shift out of the southeast
wednesday, as the high moves east of the region.

another stronger high around 30.5 inches will move east across 
southern manitoba into ontario wednesday night into christmas day,
with winds steadily increasing out of the northeast to east.


lmz261-362-364-366-563-565-567-868-231015-
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-
826 pm cst mon dec 22 2025

sheboygan wi to pentwater mi north...

.rest of tonight...south winds 10 to 20 kt becoming southwest.
chance of drizzle through early evening, then slight chance of 
drizzle and light freezing drizzle overnight. waves 4 to 6 ft 
occasionally to 8 ft subsiding to 3 to 5 ft. 
.tuesday...west winds 10 to 20 kt increasing to 15 to 25 kt.
waves 3 to 5 ft. 
.tuesday night...northwest winds to 30 kt becoming north 15 to
25 kt late in the evening, then diminishing to 10 to 20 kt after
midnight diminishing to 5 to 10 kt late. waves 3 to 5 ft
subsiding to 2 to 4 ft. 
.wednesday...southeast winds 10 to 15 kt becoming south 10 to
20 kt. waves 1 to 3 ft building to 2 to 4 ft. 
.wednesday night...southwest winds 10 to 15 kt veering to
northwest. waves 2 to 4 ft subsiding to 1 to 3 ft. 
.thursday...northeast winds 10 to 15 kt becoming east 10 to
20 kt. waves 1 to 3 ft. 
.thursday night...east winds to 30 kt becoming southeast. chance
of snow. waves 3 to 5 ft building to 4 to 6 ft occasionally to
8 ft. 
.friday...southeast winds to 30 kt becoming east 15 to 25 kt.
snow likely with a chance of rain. waves 4 to 6 ft occasionally
to 8 ft subsiding to 3 to 5 ft. 
.saturday...south winds 10 to 20 kt. waves 2 to 4 ft.  

$$

fzus63 kmqt 230301
glfls 
expires:202512230900;;058138

open lake forecast for lake superior
national weather service marquette mi
1001 pm est mon dec 22 2025

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 29.8 inch low will press east near thunder bay late tonight into 
thursday. afterwards, a 30.4 inch high pressure moves over lake 
superior from the canadian prairies tuesday night with weak 
troughing of 30.0 inches moving over the lake late wednesday as the 
high shifts east. 30.3 inch ridging builds back in for thursday as a 
30.5 inch high transits ontario. low pressure of at least 29.6 
inches moves through the lower midwest friday. a deepening low will 
then lift into the upper great lakes saturday night into sunday.



lsz265-230900-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
1001 pm est mon dec 22 2025

...gale warning in effect from 10 am est tuesday through tuesday
evening...

.rest of tonight...south winds 10 to 20 knots veering southwest
late. a slight chance of snow. a slight chance of rain after
midnight. waves calm to 2 feet building to 1 to 3 feet, then
subsiding to calm to 2 feet. 
.tuesday...west winds 20 to 30 knots increasing to gales to
35 knots by late morning, then veering northwest by mid
afternoon. waves building to 6 to 9 feet occasionally to 11 feet.
.tuesday night...northwest winds 20 to 30 knots becoming north
10 to 20 knots by midnight, then diminishing to 5 to 15 knots
late. waves subsiding to 1 to 3 feet. 
.wednesday...south winds 10 to 20 knots. a slight chance of snow
showers in the morning. waves subsiding to calm to 2 feet. 
.wednesday night...west winds 10 to 20 knots becoming north 15 to
25 knots after midnight. waves building to 2 to 4 feet. 
.thursday...northeast winds 15 to 25 knots veering east in the
afternoon. waves building to 3 to 5 feet occasionally to 7 feet. 
.thursday night...southeast winds 20 to 30 knots increasing to
gales to 35 knots after midnight. snow showers likely. waves
building to 5 to 8 feet occasionally to 10 feet. 
.friday...southeast gales to 35 knots becoming south 15 to
25 knots. a chance of snow showers. waves subsiding to 2 to
4 feet. 
.saturday...south winds 15 to 25 knots becoming west gales to
45 knots. a chance of snow showers, possibly mixed with rain.
freezing spray. waves subsiding to 1 to 3 feet, then building to
10 to 14 feet occasionally to 18 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 230301
glfls 
expires:202512230900;;058139

open lake forecast for lake superior
national weather service marquette mi
1001 pm est mon dec 22 2025

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 29.8 inch low will press east near thunder bay late tonight into 
thursday. afterwards, a 30.4 inch high pressure moves over lake 
superior from the canadian prairies tuesday night with weak 
troughing of 30.0 inches moving over the lake late wednesday as the 
high shifts east. 30.3 inch ridging builds back in for thursday as a 
30.5 inch high transits ontario. low pressure of at least 29.6 
inches moves through the lower midwest friday. a deepening low will 
then lift into the upper great lakes saturday night into sunday.



lsz266-230900-
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-
1001 pm est mon dec 22 2025

...gale warning in effect from 10 am est tuesday through tuesday
evening...

.rest of tonight...south winds 10 to 20 knots. a slight chance of
rain and snow. waves 1 to 3 feet. 
.tuesday...west winds 15 to 25 knots increasing to gales to
35 knots by late morning, then becoming northwest gales to
40 knots by mid afternoon. a slight chance of snow in the
morning. waves building to 10 to 14 feet occasionally to 18 feet.
.tuesday night...northwest gales to 35 knots becoming north 15 to
25 knots by midnight, then diminishing to 5 to 15 knots late.
waves subsiding to 2 to 4 feet. 
.wednesday...south winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. a slight chance of snow showers. waves
subsiding to calm to 2 feet, then building to 2 to 4 feet. 
.wednesday night...west winds 10 to 20 knots becoming north 15 to
25 knots after midnight. waves 2 to 4 feet. 
.thursday...northeast winds 15 to 25 knots veering east in the
afternoon. waves building to 3 to 5 feet occasionally to 7 feet. 
.thursday night...southeast gales to 35 knots. snow showers
likely. waves building to 7 to 10 feet occasionally to 13 feet. 
.friday...southeast gales to 35 knots diminishing to 15 to
25 knots. a chance of snow showers. waves subsiding to 3 to
5 feet occasionally to 7 feet. 
.saturday...south winds 15 to 25 knots becoming west gales to
45 knots. a chance of snow showers, possibly mixed with rain,
then snow showers, possibly mixed with rain. freezing spray.
waves building to 10 to 14 feet occasionally to 18 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 230301
glfls 
expires:202512230900;;058140

open lake forecast for lake superior
national weather service marquette mi
1001 pm est mon dec 22 2025

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 29.8 inch low will press east near thunder bay late tonight into 
thursday. afterwards, a 30.4 inch high pressure moves over lake 
superior from the canadian prairies tuesday night with weak 
troughing of 30.0 inches moving over the lake late wednesday as the 
high shifts east. 30.3 inch ridging builds back in for thursday as a 
30.5 inch high transits ontario. low pressure of at least 29.6 
inches moves through the lower midwest friday. a deepening low will 
then lift into the upper great lakes saturday night into sunday.



lsz267-230900-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
1001 pm est mon dec 22 2025

...gale warning in effect from 10 am est tuesday through tuesday
evening...

.rest of tonight...southeast winds 10 to 20 knots veering south
by midnight. a chance of snow, possibly mixed with rain. waves
calm to 2 feet building to 1 to 3 feet, then subsiding to calm to
2 feet. 
.tuesday...southwest winds 10 to 20 knots becoming west gales to
35 knots by late morning, then becoming northwest gales to
40 knots by mid afternoon. a chance of rain in the morning. a
slight chance of snow. waves building to 11 to 15 feet
occasionally to 19 feet. 
.tuesday night...northwest gales to 40 knots becoming north 15 to
25 knots by midnight, then diminishing to 10 to 20 knots late.
waves subsiding to 2 to 4 feet. 
.wednesday...south winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. a slight chance of snow showers. waves
subsiding to calm to 2 feet, then building to 2 to 4 feet. 
.wednesday night...southwest winds 15 to 25 knots veering north
after midnight. waves subsiding to 1 to 3 feet, then building to
2 to 4 feet. 
.thursday...northeast winds 10 to 20 knots veering east in the
afternoon. waves subsiding to 1 to 3 feet, then building to 2 to
4 feet. 
.thursday night...southeast winds 20 to 30 knots increasing to
gales to 35 knots after midnight. a chance of snow showers in the
evening, then snow showers likely after midnight. waves building
to 5 to 8 feet occasionally to 10 feet. 
.friday...southeast winds 20 to 30 knots. snow showers likely,
then a chance of snow showers. waves subsiding to 2 to 4 feet. 
.saturday...south winds 20 to 30 knots increasing to gales to
35 knots. a chance of snow showers, possibly mixed with rain,
then rain and snow showers likely. waves building to 10 to
14 feet occasionally to 18 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 230301
glfls 
expires:202512230900;;058135

open lake forecast for lake superior
national weather service marquette mi
1001 pm est mon dec 22 2025

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 29.8 inch low will press east near thunder bay late tonight into 
thursday. afterwards, a 30.4 inch high pressure moves over lake 
superior from the canadian prairies tuesday night with weak 
troughing of 30.0 inches moving over the lake late wednesday as the 
high shifts east. 30.3 inch ridging builds back in for thursday as a 
30.5 inch high transits ontario. low pressure of at least 29.6 
inches moves through the lower midwest friday. a deepening low will 
then lift into the upper great lakes saturday night into sunday.



lsz162-230900-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 pm est mon dec 22 2025 /901 pm cst mon dec 22 2025/

.rest of tonight...southeast winds 5 to 15 knots veering south by
midnight, then becoming southwest 10 to 20 knots late. a slight
chance of rain and snow after midnight. waves calm to 2 feet
building to 1 to 3 feet. 
.tuesday...west winds 15 to 25 knots increasing to 20 to 30 knots
by late morning, then becoming northwest 15 to 25 knots by mid
afternoon. waves building to 3 to 6 feet occasionally to 8 feet,
then subsiding to 2 to 4 feet. 
.tuesday night...north winds 5 to 15 knots veering northeast by
midnight, then veering southeast late. a slight chance of snow
showers after midnight. waves subsiding to calm to 2 feet. 
.wednesday...south winds 5 to 15 knots veering southwest in the
afternoon. a slight chance of snow showers in the morning. waves
calm to 2 feet. 
.wednesday night...north winds 5 to 15 knots becoming northeast
10 to 20 knots after midnight. waves building to 1 to 3 feet. 
.thursday...east winds 15 to 25 knots. a chance of snow showers
in the afternoon. waves building to 3 to 6 feet occasionally to
8 feet. 
.thursday night...east winds 15 to 25 knots. snow showers likely.
rain showers likely after midnight. waves 3 to 6 feet
occasionally to 8 feet. 
.friday...east winds 10 to 20 knots becoming south 5 to 15 knots.
a chance of snow showers, possibly mixed with rain. waves
subsiding to 1 to 3 feet. 
.saturday...southwest winds 10 to 20 knots becoming northwest
gales to 35 knots. a chance of rain and snow showers. waves
building to 3 to 6 feet occasionally to 8 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 230301
glfls 
expires:202512230900;;058136

open lake forecast for lake superior
national weather service marquette mi
1001 pm est mon dec 22 2025

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 29.8 inch low will press east near thunder bay late tonight into 
thursday. afterwards, a 30.4 inch high pressure moves over lake 
superior from the canadian prairies tuesday night with weak 
troughing of 30.0 inches moving over the lake late wednesday as the 
high shifts east. 30.3 inch ridging builds back in for thursday as a 
30.5 inch high transits ontario. low pressure of at least 29.6 
inches moves through the lower midwest friday. a deepening low will 
then lift into the upper great lakes saturday night into sunday.



lsz263-230900-
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-
1001 pm est mon dec 22 2025

.rest of tonight...southeast winds 5 to 15 knots veering south by
midnight, then becoming southwest 10 to 20 knots late. a slight
chance of rain and snow after midnight. waves calm to 2 feet
building to 1 to 3 feet. 
.tuesday...west winds 20 to 30 knots veering northwest by mid
afternoon. waves building to 5 to 8 feet occasionally to 10 feet,
then subsiding to 3 to 6 feet occasionally to 8 feet. 
.tuesday night...north winds 10 to 20 knots diminishing to 5 to
15 knots by midnight, then veering southeast late. waves
subsiding to calm to 2 feet. 
.wednesday...south winds 5 to 15 knots veering southwest in the
afternoon. a slight chance of snow showers in the morning. waves
calm to 2 feet. 
.wednesday night...northwest winds 5 to 15 knots becoming north
10 to 20 knots after midnight. waves building to 2 to 4 feet. 
.thursday...northeast winds 10 to 20 knots becoming east 20 to
30 knots in the afternoon. waves building to 3 to 6 feet
occasionally to 8 feet. 
.thursday night...east winds 20 to 30 knots veering southeast
after midnight. snow showers likely. waves building to 6 to
9 feet occasionally to 11 feet. 
.friday...southeast winds 15 to 25 knots becoming south 10 to
20 knots. a chance of snow showers. waves subsiding to 2 to
4 feet. 
.saturday...south winds 15 to 25 knots becoming northwest gales
to 40 knots. a chance of rain and snow showers. freezing spray.
waves building to 8 to 11 feet occasionally to 14 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 230301
glfls 
expires:202512230900;;058137

open lake forecast for lake superior
national weather service marquette mi
1001 pm est mon dec 22 2025

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 29.8 inch low will press east near thunder bay late tonight into 
thursday. afterwards, a 30.4 inch high pressure moves over lake 
superior from the canadian prairies tuesday night with weak 
troughing of 30.0 inches moving over the lake late wednesday as the 
high shifts east. 30.3 inch ridging builds back in for thursday as a 
30.5 inch high transits ontario. low pressure of at least 29.6 
inches moves through the lower midwest friday. a deepening low will 
then lift into the upper great lakes saturday night into sunday.



lsz264-230900-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
1001 pm est mon dec 22 2025

...gale warning in effect from 10 am est tuesday through tuesday
evening...

.rest of tonight...southeast winds 5 to 15 knots veering south by
midnight, then becoming southwest 10 to 20 knots late. a slight
chance of rain and snow after midnight. waves calm to 2 feet
building to 1 to 3 feet. 
.tuesday...west winds 15 to 25 knots increasing to 20 to 30 knots
by late morning, then veering northwest by mid afternoon. waves
building to 6 to 10 feet occasionally to 13 feet. 
.tuesday night...north winds 20 to 30 knots diminishing to 5 to
15 knots by midnight, then veering northeast late. waves
subsiding to calm to 2 feet. 
.wednesday...south winds 10 to 20 knots veering southwest in the
afternoon. a slight chance of snow showers in the morning. waves
building to 1 to 3 feet. 
.wednesday night...northwest winds 10 to 20 knots veering north
after midnight. waves building to 2 to 4 feet. 
.thursday...northeast winds 10 to 20 knots becoming east 15 to
25 knots in the afternoon. waves building to 3 to 5 feet
occasionally to 7 feet. 
.thursday night...east winds 20 to 30 knots becoming southeast
gales to 35 knots after midnight. snow showers likely. waves
building to 8 to 11 feet occasionally to 14 feet. 
.friday...southeast gales to 35 knots diminishing to 10 to
20 knots. a chance of snow showers. waves subsiding to 3 to
5 feet occasionally to 7 feet. 
.saturday...south winds 15 to 25 knots becoming northwest gales
to 40 knots. a chance of snow showers, possibly mixed with rain.
freezing spray. waves building to 9 to 12 feet occasionally to
15 feet. 

note, wave height forecasts are for ice free areas.

$$