fzus63 kdtx 121455
glflh 
expires:202512122300;;453381

open lake forecast for lake huron
national weather service detroit/pontiac mi
955 am est fri dec 12 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...high pressure, 30.10 inches, will reside over the
great lakes today. this is followed by low pressure, 29.70
inches, moving in from central canada into northern ontario
tonight and saturday. sporadic gale force wind gusts are possible
with this system.


lhz362-363-462-122300-
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-
lake huron from port austin to harbor beach beyond 5nm off shore-
955 am est fri dec 12 2025

.rest of today...west winds 10 to 15 knots becoming southwest
15 to 20 knots late in the afternoon. waves 2 to 4 feet. 
.tonight...southwest winds 15 to 20 knots increasing to 20 to
25 knots in the late evening and overnight. scattered snow
showers. waves 4 to 6 feet building to 6 to 9 feet after
midnight. waves occasionally around 12 feet. 
.saturday...west winds to 30 knots decreasing to 20 to 25 knots
in the late morning and afternoon. freezing spray. a chance of
snow in the afternoon. waves 8 to 12 feet. waves occasionally
around 15 feet. 
.saturday night...west winds 20 to 25 knots. a chance of snow.
freezing spray. waves 8 to 12 feet. waves occasionally around
15 feet. 
.sunday...northwest winds 20 to 25 knots with gusts to around
30 knots decreasing to 10 to 15 knots. a chance of snow in the
morning. freezing spray. waves 8 to 12 feet. waves occasionally
around 15 feet. 
.monday...west winds 15 to 20 knots becoming southwest to
30 knots with gusts to 35 knot gales in the late morning and
early afternoon...then decreasing to 20 to 25 knots with gusts to
around 30 knots early in the evening becoming west 15 to 20 knots
in the late evening and early morning. snow likely early in the
morning...then a chance of snow early in the evening. waves 5 to
7 feet building to 10 to 14 feet until early evening...then
subsiding to 6 to 9 feet in the late evening and early morning.
waves occasionally around 18 feet. 
.tuesday...west winds 10 to 15 knots becoming southwest 15 to
20 knots in the late morning and early afternoon...then
increasing to 30 knots with gusts to 35 knot gales until early
morning. waves 3 to 5 feet building to 12 to 16 feet. waves
occasionally around 20 feet. 


$$

fzus63 kdtx 121455
glflh 
expires:202512122300;;453380

open lake forecast for lake huron
national weather service detroit/pontiac mi
955 am est fri dec 12 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...high pressure, 30.10 inches, will reside over the
great lakes today. this is followed by low pressure, 29.70
inches, moving in from central canada into northern ontario
tonight and saturday. sporadic gale force wind gusts are possible
with this system.


lhz361-122300-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
955 am est fri dec 12 2025

.rest of today...west winds 10 to 15 knots. scattered snow
showers. waves 2 to 4 feet. 
.tonight...southwest winds 15 to 20 knots becoming west 20 to
25 knots after midnight. scattered snow showers. freezing spray
after midnight. waves 3 to 5 feet building to 5 to 7 feet after
midnight. waves occasionally around 10 feet. 
.saturday...west winds 20 to 25 knots with gusts to around
30 knots. scattered snow showers. freezing spray. waves 8 to
12 feet. waves occasionally around 15 feet. 
.saturday night...west winds 20 to 25 knots becoming northwest
15 to 20 knots in the late evening and overnight. a chance of
snow. freezing spray. waves 6 to 9 feet. waves occasionally
around 12 feet. 
.sunday...north winds 15 to 20 knots becoming northwest 5 to
10 knots. waves 4 to 6 feet subsiding to 1 to 3 feet late in the
evening. waves occasionally around 8 feet. 
.monday...southwest winds 15 to 20 knots increasing to 20 to
25 knots in the late morning and early afternoon...then becoming
west 15 to 20 knots early in the evening decreasing to 10 to
15 knots in the late evening and early morning. snow likely early
in the morning...then a chance of snow until early evening. waves
4 to 6 feet. waves occasionally around 8 feet. 
.tuesday...west winds 5 to 10 knots becoming southwest 10 to
15 knots in the late morning and early afternoon...then
increasing to 15 to 20 knots until early morning. waves 1 to
3 feet building to 5 to 7 feet until early morning. waves
occasionally around 10 feet. 


$$

fzus63 kmkx 121444
glflm 
expires:202512122215;;453076

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
844 am cst fri dec 12 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...

light and variable winds this morning will give way to breezy
southwest winds this afternoon as low pressure around 29.7 inches
develops north of lake superior and moves east through the
weekend. the low will sweep an arctic front across lake michigan 
tonight, with a prolonged period of brisk northwest winds and 
heavy freezing spray for much of the weekend. 

high pressure around 30.8 inches will move southeast from the 
northern plains and through the western great lakes late sunday. 
winds ease later sunday as the high approaches, but gusty winds 
may return early next week as the high exits into the ohio river 
valley.


lmz080-669-671-673-675-777-779-870-872-874-876-878-122215-
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-
844 am cst fri dec 12 2025

sheboygan wi to pentwater mi south...

...heavy freezing spray warning in effect from late tonight
through sunday morning...

.rest of today...southwest winds 5 to 10 kt becoming west 15 to
25 kt. chance of flurries this afternoon. waves 1 to 2 ft
building to 2 to 4 ft. 
.tonight...west winds to 30 kt becoming northwest. chance of
flurries. freezing spray overnight. waves 4 to 7 ft occasionally
to 9 ft building to 7 to 10 ft occasionally to 13 ft. 
.saturday...northwest winds to 30 kt. freezing spray. chance of
snow. waves 7 to 10 ft occasionally to 13 ft. 
.saturday night...northwest winds to 30 kt. heavy freezing spray
in the evening, then freezing spray overnight. chance of snow
showers. waves 8 to 11 ft occasionally to 14 ft. 
.sunday...northwest winds to 30 kt. chance of snow showers in the
morning. freezing spray. waves 8 to 11 ft occasionally to 14 ft
subsiding to 6 to 9 ft occasionally to 12 ft. 
.sunday night...west winds 10 to 20 kt becoming southwest to
30 kt. freezing spray. waves 4 to 7 ft occasionally to 9 ft. 
.monday...southwest gales to 35 kt becoming west. freezing spray.
waves 8 to 11 ft occasionally to 14 ft. 
.tuesday...southwest winds to 30 kt. waves 3 to 5 ft building to
5 to 8 ft occasionally to 10 ft.  

$$

fzus63 kmkx 121444
glflm 
expires:202512122215;;453075

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
844 am cst fri dec 12 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...

light and variable winds this morning will give way to breezy
southwest winds this afternoon as low pressure around 29.7 inches
develops north of lake superior and moves east through the
weekend. the low will sweep an arctic front across lake michigan 
tonight, with a prolonged period of brisk northwest winds and 
heavy freezing spray for much of the weekend. 

high pressure around 30.8 inches will move southeast from the 
northern plains and through the western great lakes late sunday. 
winds ease later sunday as the high approaches, but gusty winds 
may return early next week as the high exits into the ohio river 
valley.


lmz261-362-364-366-563-565-567-868-122215-
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-
844 am cst fri dec 12 2025

sheboygan wi to pentwater mi north...

...heavy freezing spray warning in effect from late tonight
through sunday morning...

.rest of today...west winds 10 to 15 kt becoming southwest to
30 kt. chance of snow this afternoon. waves 1 to 3 ft building to
4 to 6 ft occasionally to 8 ft. 
.tonight...west winds to 30 kt becoming northwest. freezing
spray. chance of snow in the evening, then chance of flurries
overnight. waves 6 to 9 ft occasionally to 12 ft. 
.saturday...northwest winds to 30 kt. freezing spray. waves 6 to
9 ft occasionally to 12 ft. 
.saturday night...northwest winds to 30 kt. freezing spray.
chance of snow showers. waves 6 to 9 ft occasionally to 12 ft
building to 7 to 10 ft occasionally to 13 ft. 
.sunday...northwest winds to 30 kt. freezing spray in the
morning. waves 7 to 10 ft occasionally to 13 ft subsiding to 5 to
8 ft occasionally to 10 ft. 
.sunday night...west winds 10 to 20 kt becoming southwest to
30 kt. freezing spray. waves 3 to 5 ft building to 5 to 8 ft
occasionally to 10 ft. 
.monday...southwest gales to 35 kt becoming west to 30 kt.
freezing spray. chance of snow. waves 7 to 10 ft occasionally to
13 ft. 
.tuesday...southwest winds to 30 kt increasing to gales to 40 kt.
waves 3 to 5 ft building to 6 to 9 ft occasionally to 12 ft.  

$$

fzus63 kmqt 121501
glfls 
expires:202512122100;;453776

open lake forecast for lake superior
national weather service marquette mi
1000 am est fri dec 12 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 29.9 inch trough will move through lake superior this afternoon 
and evening while a 30.7 inch high spreads across central canada and 
the northern plains. ridging will build to 30.7 inches over the 
western lake by sunday morning as the high moves into iowa. a 30.0 
inch trough will move through the lake monday as the high settles 
into the south at 30.3 inches. a 30.1 inch ridge will move through 
lake superior monday night followed by a trough of at least 29.3 
inches tuesday night into wednesday.



lsz265-122100-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
1000 am est fri dec 12 2025

...gale warning in effect from 10 pm est this evening through
sunday morning...
...heavy freezing spray warning in effect from late tonight
through sunday morning...

.rest of today...southwest winds 10 to 20 knots increasing to
15 to 25 knots by late morning, then becoming west 20 to 30 knots
by mid afternoon. a slight chance of snow showers late in the
morning, then snow showers likely in the afternoon. waves calm to
2 feet building to 3 to 6 feet occasionally to 8 feet. 
.tonight...west gales to 35 knots becoming northwest gales to
40 knots by midnight. freezing spray. snow showers likely. waves
building to 5 to 9 feet occasionally to 11 feet. 
.saturday...northwest gales to 40 knots. heavy freezing spray.
snow showers. waves subsiding to 4 to 7 feet occasionally to
9 feet. 
.saturday night...northwest gales to 40 knots. freezing spray.
snow showers. waves building to 7 to 10 feet occasionally to
13 feet. 
.sunday...northwest winds 20 to 30 knots becoming west 15 to
25 knots in the afternoon. freezing spray in the morning.
scattered snow showers. waves subsiding to 1 to 3 feet. 
.sunday night...southwest winds 15 to 25 knots increasing to
20 to 30 knots after midnight. a chance of snow showers after
midnight. waves subsiding to calm to 2 feet, then building to
2 to 4 feet. 
.monday...west winds 20 to 30 knots becoming northwest 10 to
20 knots. a chance of snow showers. waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to calm to 2 feet. 
.tuesday...south winds 15 to 25 knots becoming west 20 to
30 knots. waves building to 3 to 6 feet occasionally to 8 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 121501
glfls 
expires:202512122100;;453777

open lake forecast for lake superior
national weather service marquette mi
1000 am est fri dec 12 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 29.9 inch trough will move through lake superior this afternoon 
and evening while a 30.7 inch high spreads across central canada and 
the northern plains. ridging will build to 30.7 inches over the 
western lake by sunday morning as the high moves into iowa. a 30.0 
inch trough will move through the lake monday as the high settles 
into the south at 30.3 inches. a 30.1 inch ridge will move through 
lake superior monday night followed by a trough of at least 29.3 
inches tuesday night into wednesday.



lsz266-122100-
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 est fri dec 12 2025

...gale warning in effect from 10 pm est this evening through
sunday morning...
...heavy freezing spray warning in effect from late tonight
through sunday morning...

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

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 121501
glfls 
expires:202512122100;;453778

open lake forecast for lake superior
national weather service marquette mi
1000 am est fri dec 12 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 29.9 inch trough will move through lake superior this afternoon 
and evening while a 30.7 inch high spreads across central canada and 
the northern plains. ridging will build to 30.7 inches over the 
western lake by sunday morning as the high moves into iowa. a 30.0 
inch trough will move through the lake monday as the high settles 
into the south at 30.3 inches. a 30.1 inch ridge will move through 
lake superior monday night followed by a trough of at least 29.3 
inches tuesday night into wednesday.



lsz267-122100-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
1000 am est fri dec 12 2025

...gale warning in effect from 10 pm est this evening through
sunday morning...
...heavy freezing spray warning in effect from late tonight
through sunday morning...

.rest of today...west winds 10 to 20 knots backing southwest by
late morning, then increasing to 20 to 30 knots by mid afternoon.
a chance of snow showers. waves 1 to 3 feet building to 3 to
5 feet occasionally to 7 feet. 
.tonight...west winds 20 to 30 knots increasing to gales to
35 knots by midnight, then becoming northwest gales to 40 knots
late. freezing spray. snow showers. waves building to 10 to
14 feet occasionally to 18 feet, then subsiding to 9 to 12 feet
occasionally to 15 feet. 
.saturday...northwest gales to 40 knots. freezing spray. snow
showers. waves subsiding to 7 to 10 feet occasionally to 13 feet.
.saturday night...north gales to 35 knots diminishing to 20 to
30 knots after midnight. freezing spray. snow showers. waves
building to 8 to 11 feet occasionally to 14 feet, then subsiding
to 6 to 9 feet occasionally to 11 feet. 
.sunday...north winds 20 to 30 knots becoming northwest 15 to
25 knots in the afternoon. freezing spray in the morning.
scattered snow showers. waves subsiding to 3 to 5 feet
occasionally to 7 feet. 
.sunday night...west winds 10 to 20 knots becoming southwest
20 to 30 knots after midnight. a chance of snow showers. freezing
spray after midnight. waves subsiding to 2 to 4 feet, then
building to 4 to 7 feet occasionally to 9 feet. 
.monday...west winds 20 to 30 knots becoming northwest 10 to
20 knots. freezing spray. snow showers. waves building to 5 to
8 feet occasionally to 10 feet, then subsiding to 1 to 3 feet. 
.tuesday...south winds 20 to 30 knots veering southwest. a chance
of snow showers. a chance of rain showers. waves building to 5 to
8 feet occasionally to 10 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 121501
glfls 
expires:202512122100;;453773

open lake forecast for lake superior
national weather service marquette mi
1000 am est fri dec 12 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 29.9 inch trough will move through lake superior this afternoon 
and evening while a 30.7 inch high spreads across central canada and 
the northern plains. ridging will build to 30.7 inches over the 
western lake by sunday morning as the high moves into iowa. a 30.0 
inch trough will move through the lake monday as the high settles 
into the south at 30.3 inches. a 30.1 inch ridge will move through 
lake superior monday night followed by a trough of at least 29.3 
inches tuesday night into wednesday.



lsz162-122100-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 am est fri dec 12 2025 /900 am cst fri dec 12 2025/

...heavy freezing spray warning in effect from 4 pm est /3 pm
cst/ this afternoon through late saturday night...

.rest of today...west winds 15 to 25 knots becoming northwest
20 to 30 knots by mid afternoon. snow showers likely late in the
morning, then a chance of snow showers in the afternoon. waves
1 to 3 feet building to 3 to 6 feet occasionally to 8 feet. 
.tonight...northwest winds to 30 knots with a few gale force
gusts to 35 knots possible diminishing to 20 to 30 knots by
midnight. heavy freezing spray. a chance of snow showers. waves
building to 4 to 7 feet occasionally to 9 feet, then subsiding to
3 to 6 feet occasionally to 8 feet. 
.saturday...northwest winds 20 to 30 knots. heavy freezing spray
in the morning. isolated snow showers. waves subsiding to 3 to
6 feet occasionally to 8 feet. 
.saturday night...northwest winds 20 to 30 knots diminishing to
15 to 25 knots after midnight. isolated snow showers. waves
subsiding to 1 to 3 feet. 
.sunday...northwest winds 10 to 20 knots backing southwest in the
afternoon. isolated snow showers in the morning. waves subsiding
to calm to 2 feet. 
.sunday night...southwest winds 20 to 30 knots. freezing spray
after midnight. a chance of snow showers after midnight. waves
building to 4 to 7 feet occasionally to 9 feet, then subsiding to
3 to 6 feet occasionally to 8 feet. 
.monday...west winds 15 to 25 knots becoming southwest 10 to
20 knots. waves subsiding to calm to 2 feet. 
.tuesday...southwest winds 20 to 30 knots veering west. waves
building to 4 to 7 feet occasionally to 9 feet, then subsiding to
2 to 4 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 121501
glfls 
expires:202512122100;;453774

open lake forecast for lake superior
national weather service marquette mi
1000 am est fri dec 12 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 29.9 inch trough will move through lake superior this afternoon 
and evening while a 30.7 inch high spreads across central canada and 
the northern plains. ridging will build to 30.7 inches over the 
western lake by sunday morning as the high moves into iowa. a 30.0 
inch trough will move through the lake monday as the high settles 
into the south at 30.3 inches. a 30.1 inch ridge will move through 
lake superior monday night followed by a trough of at least 29.3 
inches tuesday night into wednesday.



lsz263-122100-
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 est fri dec 12 2025

...gale warning in effect from 7 pm est this evening through late
tonight...
...heavy freezing spray warning in effect from 7 pm est this
evening through sunday morning...

.rest of today...southwest winds 10 to 20 knots becoming west
20 to 30 knots by late morning, then increasing to gales to
35 knots by mid afternoon. snow showers likely late in the
morning, then a chance of snow showers in the afternoon. freezing
spray in the afternoon. waves 2 to 4 feet building to 5 to 8 feet
occasionally to 10 feet. 
.tonight...northwest gales to 35 knots diminishing to 20 to
30 knots late. heavy freezing spray. scattered snow showers.
waves building to 6 to 10 feet occasionally to 13 feet. 
.saturday...northwest winds 20 to 30 knots. heavy freezing spray.
scattered snow showers. waves subsiding to 3 to 6 feet
occasionally to 8 feet, then building to 4 to 7 feet occasionally
to 9 feet. 
.saturday night...northwest winds 20 to 30 knots diminishing to
15 to 25 knots after midnight. heavy freezing spray. scattered
snow showers. waves subsiding to 3 to 5 feet occasionally to
7 feet. 
.sunday...northwest winds 10 to 20 knots backing west in the
afternoon. scattered snow showers. waves subsiding to calm to
2 feet, then building to 1 to 3 feet. 
.sunday night...southwest winds 20 to 30 knots increasing to
gales to 35 knots after midnight. freezing spray after midnight.
a chance of snow showers after midnight. waves building to 6 to
9 feet occasionally to 11 feet. 
.monday...west winds 20 to 30 knots becoming southwest 10 to
20 knots. freezing spray. waves subsiding to calm to 2 feet. 
.tuesday...southwest gales to 35 knots becoming west 20 to
30 knots. waves building to 6 to 9 feet occasionally to 11 feet,
then subsiding to 3 to 6 feet occasionally to 8 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 121501
glfls 
expires:202512122100;;453775

open lake forecast for lake superior
national weather service marquette mi
1000 am est fri dec 12 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 29.9 inch trough will move through lake superior this afternoon 
and evening while a 30.7 inch high spreads across central canada and 
the northern plains. ridging will build to 30.7 inches over the 
western lake by sunday morning as the high moves into iowa. a 30.0 
inch trough will move through the lake monday as the high settles 
into the south at 30.3 inches. a 30.1 inch ridge will move through 
lake superior monday night followed by a trough of at least 29.3 
inches tuesday night into wednesday.



lsz264-122100-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
1000 am est fri dec 12 2025

...gale warning in effect from 7 pm est this evening through
sunday morning...
...heavy freezing spray warning in effect from 7 pm est this
evening through sunday morning...

.rest of today...southwest winds 10 to 20 knots increasing to
15 to 25 knots by late morning, then becoming west 20 to 30 knots
by mid afternoon. a chance of snow showers late in the morning,
then snow showers in the afternoon. waves 2 to 4 feet building to
5 to 8 feet occasionally to 10 feet. 
.tonight...northwest gales to 35 knots diminishing to 20 to
30 knots late. heavy freezing spray. a chance of snow showers in
the evening. numerous snow showers after midnight. waves building
to 6 to 10 feet occasionally to 13 feet. 
.saturday...northwest winds 20 to 30 knots. heavy freezing spray.
numerous snow showers. waves subsiding to 5 to 8 feet
occasionally to 10 feet. 
.saturday night...north gales to 35 knots diminishing to 20 to
30 knots after midnight. heavy freezing spray. scattered snow
showers. waves building to 7 to 10 feet occasionally to 13 feet,
then subsiding to 5 to 8 feet occasionally to 10 feet. 
.sunday...northwest winds 15 to 25 knots becoming west 10 to
20 knots in the afternoon. freezing spray in the morning.
scattered snow showers. waves subsiding to 1 to 3 feet. 
.sunday night...southwest winds 20 to 30 knots increasing to
gales to 35 knots after midnight. freezing spray after midnight.
a chance of snow showers after midnight. waves building to 6 to
9 feet occasionally to 11 feet. 
.monday...northwest winds 20 to 30 knots becoming south 10 to
20 knots. freezing spray. waves building to 7 to 10 feet
occasionally to 13 feet, then subsiding to calm to 2 feet. 
.tuesday...south winds 20 to 30 knots veering west. waves
building to 7 to 10 feet occasionally to 13 feet, then subsiding
to 5 to 8 feet occasionally to 10 feet. 

note, wave height forecasts are for ice free areas.

$$