fzus63 kdtx 190217
glflh 
expires:202512191030;;832817

open lake forecast for lake huron
national weather service detroit/pontiac mi
917 pm est thu dec 18 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, 29.10 inches, tracks over lake superior
this evening which drags a strong cold front across the great
lakes. southerly winds shift sharply to the west-northwest with
the cold frontal passage between 01z and 05z this evening. snow
squalls and northwest gales persist friday.


lhz361-362-191030-
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-
917 pm est thu dec 18 2025

...gale warning in effect through friday evening...

.rest of tonight...south winds 20 to 25 knots with gusts to
40 knot gales becoming southwest 15 to 20 knots with gusts to
around 30 knots after midnight...then increasing to 20 to
25 knots with gusts to around 30 knots early in the morning.
numerous showers this evening...then numerous rain and snow
showers after midnight. waves 12 to 16 feet subsiding to 8 to
12 feet early in the morning. waves occasionally around 20 feet. 
.friday...west winds to 30 knots becoming northwest at 35 knot
gales with gusts to 40 knot gales in the late morning and
afternoon. scattered snow showers. waves 8 to 12 feet building to
12 to 16 feet in the late morning and afternoon. waves
occasionally around 20 feet. 
.friday night...northwest winds 20 to 25 knots with gusts to
around 30 knots decreasing to 10 to 15 knots by midnight...then
backing to the southwest after midnight. waves 12 to 16 feet
subsiding to 3 to 5 feet. waves occasionally around 20 feet. 
.saturday...south winds 20 to 25 knots. gusts to 30 knots in the
late morning and early afternoon. a chance of snow. waves 8 to
12 feet. waves occasionally around 15 feet. 
.saturday night...southwest winds 20 to 25 knots becoming west at
35 knot gales. a chance of snow in the evening. freezing spray
after midnight. waves 10 to 14 feet building to 12 to 16 feet
after midnight. waves occasionally around 20 feet. a gale warning
may be needed. 
.sunday...west winds to 30 knots with gusts to 35 knot gales
decreasing to 10 to 15 knots. freezing spray. waves 12 to 16 feet
subsiding to 4 to 6 feet. waves occasionally around 20 feet. 
.monday...southwest winds 10 to 15 knots becoming south 15 to
20 knots . a chance of snow . waves 3 to 5 feet building to 5 to
7 feet by midnight. waves occasionally around 10 feet. 
.tuesday...southwest winds 15 to 20 knots veering to the
northwest . a chance of snow early in the morning. waves 4 to
6 feet. 


$$

fzus63 kdtx 190217
glflh 
expires:202512191030;;832818

open lake forecast for lake huron
national weather service detroit/pontiac mi
917 pm est thu dec 18 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, 29.10 inches, tracks over lake superior
this evening which drags a strong cold front across the great
lakes. southerly winds shift sharply to the west-northwest with
the cold frontal passage between 01z and 05z this evening. snow
squalls and northwest gales persist friday.


lhz363-462-191030-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
lake huron from port austin to harbor beach beyond 5nm off shore-
917 pm est thu dec 18 2025

...gale warning in effect through friday evening...

.rest of tonight...south winds 20 to 25 knots with gusts to
40 knot gales veering to the southwest with gusts to around
30 knots early in the morning. showers this evening...then
numerous rain and snow showers after midnight. waves 12 to
16 feet subsiding to 8 to 12 feet early in the morning. waves
occasionally around 20 feet. 
.friday...west winds to 30 knots increasing to 35 knot gales in
the afternoon. gusts to 40 knot gales. scattered snow showers.
waves 10 to 14 feet building to 14 to 18 feet in the afternoon.
waves occasionally around 23 feet. 
.friday night...northwest winds to 30 knots with gusts to 35 knot
gales becoming west 10 to 15 knots by midnight...then becoming
southwest 15 to 20 knots after midnight. waves 10 to 14 feet
subsiding to 5 to 7 feet after midnight. waves occasionally
around 18 feet. 
.saturday...south winds 20 to 25 knots with gusts to around
30 knots. a chance of snow and rain in the afternoon. waves 8 to
12 feet. waves occasionally around 15 feet. 
.saturday night...southwest winds 20 to 25 knots becoming west to
30 knots in the late evening and overnight. gusts to 35 knot
gales. waves 10 to 14 feet. waves occasionally around 18 feet. 
.sunday...west winds to 30 knots with gusts to 35 knot gales
decreasing to 10 to 15 knots. freezing spray. waves 8 to 12 feet
subsiding to 4 to 6 feet late in the evening. waves occasionally
around 15 feet. 
.monday...southwest winds 10 to 15 knots becoming south 15 to
20 knots . a chance of snow early in the evening. a chance of
snow and rain by midnight. waves 3 to 5 feet building to 5 to
7 feet by midnight. waves occasionally around 10 feet. 
.tuesday...southwest winds 15 to 20 knots becoming west 10 to
15 knots . a chance of snow and rain early in the morning. waves
4 to 6 feet. waves occasionally around 8 feet. 


$$

fzus63 kmkx 190301
glflm 
expires:202512191030;;834130

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
901 pm cst thu dec 18 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...

low pressure of 29.1 inches is expected to move east of lake huron
tonight, dragging a cold front and a few week troughs over the
lake. southerly gales are anticipated to continue over the next
few hours before a little bit of a lull as winds come around to
the west this evening and northwest by tomorrow morning. gales are
anticipated to ramp up again this evening and continue through
tomorrow morning over all of lake michigan. a gale warning is in
effect.

winds are then expected to briefly ease late friday into friday
night as a surface ridge of 30.0 inches builds into the region.
northwest winds will come back to southerly during this time, and
then become southerly and gusty in a warm advection regime
saturday morning, and westerly saturday afternoon and evening
following a cold front. gales may be possible with the west winds
saturday evening.


lmz261-362-364-563-191030-
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 rock island passage to sturgeon bay wi-
901 pm cst thu dec 18 2025

sturgeon bay wi to point betsie mi north...

...gale warning in effect through friday afternoon...

.rest of tonight...southwest winds to 30 kt becoming northwest
gales to 35 kt. chance of rain and slight chance of snow through
early evening, then snow overnight. freezing spray overnight.
waves 7 to 10 ft occasionally to 13 ft. 
.friday...northwest gales to 35 kt diminishing to 30 kt. freezing
spray. chance of snow in the morning, then slight chance of snow
in the afternoon. waves 8 to 11 ft occasionally to 14 ft
subsiding to 5 to 8 ft occasionally to 10 ft. 
.friday night...west winds 10 to 20 kt becoming southwest late in
the evening, then becoming south to 30 kt overnight. chance of
snow overnight. waves 3 to 5 ft building to 8 to 11 ft
occasionally to 14 ft. 
.saturday...southwest winds to 30 kt becoming west. chance of
snow in the morning. waves 8 to 12 ft occasionally to 16 ft
subsiding to 7 to 10 ft occasionally to 13 ft. 
.saturday night...west gales to 40 kt. freezing spray. waves 8 to
11 ft occasionally to 14 ft. 
.sunday...northwest winds to 30 kt diminishing to 15 to 25 kt.
freezing spray in the morning. waves 5 to 8 ft occasionally to
10 ft subsiding to 3 to 5 ft. 
.sunday night...west winds 10 to 15 kt becoming southwest 10 to
20 kt. waves 2 to 4 ft. 
.monday...southwest winds 10 to 20 kt becoming south 15 to 25 kt.
chance of snow. waves 3 to 5 ft building to 4 to 7 ft
occasionally to 9 ft. 
.tuesday...west winds 10 to 20 kt becoming northwest. waves 4 to
6 ft occasionally to 8 ft subsiding to 2 to 4 ft.  

$$

fzus63 kmkx 190301
glflm 
expires:202512191030;;834131

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
901 pm cst thu dec 18 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...

low pressure of 29.1 inches is expected to move east of lake huron
tonight, dragging a cold front and a few week troughs over the
lake. southerly gales are anticipated to continue over the next
few hours before a little bit of a lull as winds come around to
the west this evening and northwest by tomorrow morning. gales are
anticipated to ramp up again this evening and continue through
tomorrow morning over all of lake michigan. a gale warning is in
effect.

winds are then expected to briefly ease late friday into friday
night as a surface ridge of 30.0 inches builds into the region.
northwest winds will come back to southerly during this time, and
then become southerly and gusty in a warm advection regime
saturday morning, and westerly saturday afternoon and evening
following a cold front. gales may be possible with the west winds
saturday evening.


lmz366-565-567-868-191030-
lake michigan from point betsie to manistee mi 5 nm offshore to
mid lake-
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-
901 pm cst thu dec 18 2025

sturgeon bay wi to point betsie mi south to sheboygan wi to
pentwater mi...

...gale warning in effect through friday morning...

.rest of tonight...west winds to 30 kt becoming northwest gales
to 35 kt. slight chance of rain and snow through early evening,
then snow overnight. freezing spray overnight. waves 8 to 11 ft
occasionally to 14 ft building to 8 to 12 ft occasionally to
16 ft. 
.friday...northwest gales to 35 kt diminishing to 15 to 25 kt.
chance of snow and slight chance of light freezing rain in the
morning. freezing spray. waves 10 to 14 ft occasionally to 18 ft
subsiding to 6 to 9 ft occasionally to 12 ft. 
.friday night...southwest winds 10 to 15 kt becoming south 15 to
25 kt late in the evening, then increasing to 30 kt after
midnight becoming south to 30 kt late. waves 4 to 6 ft
occasionally to 8 ft building to 8 to 12 ft occasionally to
16 ft. 
.saturday...southwest winds to 30 kt becoming west. chance of
snow in the morning. waves 10 to 14 ft occasionally to 18 ft
subsiding to 7 to 10 ft occasionally to 13 ft. 
.saturday night...west gales to 35 kt becoming northwest to
30 kt. freezing spray. waves 10 to 14 ft occasionally to 18 ft. 
.sunday...northwest winds to 30 kt becoming west 10 to 20 kt in
the afternoon. freezing spray in the morning. waves 7 to 10 ft
occasionally to 13 ft subsiding to 4 to 6 ft occasionally to
8 ft. 
.sunday night...west winds 10 to 15 kt becoming southwest 10 to
20 kt. waves 2 to 4 ft. 
.monday...south winds 15 to 25 kt. chance of snow. waves 4 to
6 ft occasionally to 8 ft building to 5 to 8 ft occasionally to
10 ft. 
.tuesday...west winds 10 to 20 kt becoming northwest. waves 4 to
6 ft occasionally to 8 ft subsiding to 3 to 5 ft.  

$$

fzus63 kmkx 190301
glflm 
expires:202512191030;;834132

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
901 pm cst thu dec 18 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...

low pressure of 29.1 inches is expected to move east of lake huron
tonight, dragging a cold front and a few week troughs over the
lake. southerly gales are anticipated to continue over the next
few hours before a little bit of a lull as winds come around to
the west this evening and northwest by tomorrow morning. gales are
anticipated to ramp up again this evening and continue through
tomorrow morning over all of lake michigan. a gale warning is in
effect.

winds are then expected to briefly ease late friday into friday
night as a surface ridge of 30.0 inches builds into the region.
northwest winds will come back to southerly during this time, and
then become southerly and gusty in a warm advection regime
saturday morning, and westerly saturday afternoon and evening
following a cold front. gales may be possible with the west winds
saturday evening.


lmz080-669-671-673-675-777-779-870-872-874-876-878-191030-
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-
901 pm cst thu dec 18 2025

sheboygan wi to pentwater mi south...

...gale warning in effect through friday morning...

.rest of tonight...west winds to 30 kt increasing to gales to
35 kt. chance of snow through early evening, then snow likely
overnight. freezing spray overnight. waves 7 to 10 ft
occasionally to 13 ft building to 10 to 14 ft occasionally to
18 ft. 
.friday...northwest gales to 35 kt becoming west 15 to 25 kt.
chance of snow and slight chance of light freezing rain in the
morning. freezing spray. waves 12 to 16 ft occasionally to 21 ft
subsiding to 8 to 11 ft occasionally to 14 ft. 
.friday night...southwest winds 10 to 20 kt becoming south 15 to
25 kt late in the evening, then increasing to 30 kt after
midnight becoming south to 30 kt late. waves 5 to 8 ft
occasionally to 10 ft building to 8 to 12 ft occasionally to
16 ft. 
.saturday...southwest winds to 30 kt becoming west. chance of
snow in the morning. waves 10 to 14 ft occasionally to 18 ft
subsiding to 8 to 11 ft occasionally to 14 ft. 
.saturday night...west gales to 35 kt becoming northwest.
freezing spray overnight. waves 10 to 14 ft occasionally to
18 ft. 
.sunday...northwest winds to 30 kt diminishing to 10 to 20 kt in
the afternoon. freezing spray in the morning. waves 8 to 12 ft
occasionally to 16 ft subsiding to 5 to 8 ft occasionally to
10 ft. 
.sunday night...west winds 10 to 15 kt becoming south 10 to
20 kt. waves 3 to 5 ft. 
.monday...south winds 15 to 25 kt. waves 4 to 7 ft occasionally
to 9 ft building to 5 to 8 ft occasionally to 10 ft. 
.tuesday...west winds 10 to 20 kt. waves 4 to 7 ft occasionally
to 9 ft subsiding to 3 to 5 ft.  

$$

fzus63 kmqt 190301
glfls 
expires:202512190900;;834152

open lake forecast for lake superior
national weather service marquette mi
1000 pm est thu dec 18 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 29.1 inch clipper lifts northeast away from the lake tonight 
before reaching northern quebec friday morning. a 29.9 inch ridge 
then returns to the lake on friday via a 30.2 inch high over the 
lower mississippi valley and a weakening 29.9 inch high over 
northern ontario. another low pressure of around 29.3 inches tracks 
north of lake superior on saturday. this is then followed by a 30.3 
inch high over the canadian prairies sliding southeast into the ohio 
river valley late this weekend, building to 30.7 inches by monday 
morning. lake superior will remain under the influence of this high 
into monday night.



lsz263-190900-
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 pm est thu dec 18 2025

...storm warning in effect until 7 am est friday...
...heavy freezing spray warning in effect until 8 am est friday...
...gale watch in effect from saturday morning through late
saturday night...

.rest of tonight...north storm force winds to 55 knots
diminishing to gales to 45 knots late. heavy freezing spray. snow
late in the evening. snow likely after midnight. waves 10 to
14 feet occasionally to 18 feet building to 12 to 17 feet
occasionally to 21 feet, then subsiding to 11 to 15 feet
occasionally to 19 feet. 
.friday...north gales to 35 knots diminishing to 15 to 25 knots
by late morning, then becoming south 5 to 15 knots by mid
afternoon. freezing spray in the morning. a chance of snow. waves
subsiding to 1 to 3 feet. 
.friday night...south winds 15 to 25 knots increasing to 20 to
30 knots by midnight, then veering southwest late. a chance of
snow in the evening, then snow likely after midnight. waves
subsiding to calm to 2 feet, then building to 4 to 7 feet
occasionally to 9 feet. 
.saturday...southwest gales to 40 knots veering west in the
afternoon. a slight chance of snow. freezing spray in the
afternoon. waves building to 12 to 17 feet occasionally to
21 feet, then subsiding to 10 to 14 feet occasionally to 18 feet.
.saturday night...northwest gales to 40 knots. heavy freezing
spray. a slight chance of snow showers. waves 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. waves subsiding to 1 to 3 feet. 
.sunday night...southwest winds 5 to 15 knots. waves 1 to 3 feet.
.monday...south winds 10 to 20 knots. waves subsiding to calm to
2 feet, then building to 2 to 4 feet. 
.tuesday...west winds 15 to 25 knots becoming north 5 to
15 knots. waves subsiding to calm to 2 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 190301
glfls 
expires:202512190900;;834155

open lake forecast for lake superior
national weather service marquette mi
1000 pm est thu dec 18 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 29.1 inch clipper lifts northeast away from the lake tonight 
before reaching northern quebec friday morning. a 29.9 inch ridge 
then returns to the lake on friday via a 30.2 inch high over the 
lower mississippi valley and a weakening 29.9 inch high over 
northern ontario. another low pressure of around 29.3 inches tracks 
north of lake superior on saturday. this is then followed by a 30.3 
inch high over the canadian prairies sliding southeast into the ohio 
river valley late this weekend, building to 30.7 inches by monday 
morning. lake superior will remain under the influence of this high 
into monday night.



lsz266-190900-
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 pm est thu dec 18 2025

...storm warning in effect through friday morning...
...heavy freezing spray warning in effect until 10 am est
friday...
...gale watch in effect from saturday morning through sunday
morning...

.rest of tonight...north gales to 40 knots increasing to storm
force winds to 55 knots by midnight. patchy fog late in the
evening. heavy freezing spray. a chance of rain late in the
evening. snow. waves 9 to 12 feet occasionally to 15 feet
building to 15 to 20 feet occasionally to 25 feet. 
.friday...north storm force winds to 55 knots diminishing to
20 to 30 knots. heavy freezing spray. snow likely in the morning.
a slight chance of snow showers in the afternoon. waves building
to 17 to 22 feet occasionally to 28 feet, then subsiding to 5 to
8 feet occasionally to 10 feet. 
.friday night...south winds 10 to 20 knots increasing to gales to
35 knots by midnight. a slight chance of snow in the evening,
then snow likely after midnight. freezing spray after midnight.
waves subsiding to 2 to 4 feet, then building to 7 to 10 feet
occasionally to 13 feet. 
.saturday...southwest gales to 35 knots becoming west gales to
45 knots in the afternoon. snow likely. freezing spray in the
afternoon. waves building to 12 to 17 feet occasionally to
21 feet. 
.saturday night...west gales to 45 knots becoming northwest gales
to 40 knots after midnight. freezing spray. snow showers. waves
building to 15 to 20 feet occasionally to 25 feet, then subsiding
to 12 to 17 feet occasionally to 21 feet. 
.sunday...northwest gales to 35 knots diminishing to 15 to
25 knots in the afternoon. freezing spray. a chance of snow
showers. waves subsiding to 3 to 6 feet occasionally to 8 feet. 
.sunday night...west winds 15 to 25 knots backing southwest after
midnight. waves subsiding to 2 to 4 feet. 
.monday...south winds 15 to 25 knots. a chance of snow showers.
waves building to 3 to 6 feet occasionally to 8 feet. 
.tuesday...northwest winds 15 to 25 knots veering north. 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 190301
glfls 
expires:202512190900;;834156

open lake forecast for lake superior
national weather service marquette mi
1000 pm est thu dec 18 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 29.1 inch clipper lifts northeast away from the lake tonight 
before reaching northern quebec friday morning. a 29.9 inch ridge 
then returns to the lake on friday via a 30.2 inch high over the 
lower mississippi valley and a weakening 29.9 inch high over 
northern ontario. another low pressure of around 29.3 inches tracks 
north of lake superior on saturday. this is then followed by a 30.3 
inch high over the canadian prairies sliding southeast into the ohio 
river valley late this weekend, building to 30.7 inches by monday 
morning. lake superior will remain under the influence of this high 
into monday night.



lsz267-190900-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
1000 pm est thu dec 18 2025

...gale warning in effect through friday morning...
...heavy freezing spray warning in effect until 10 am est
friday...
...gale watch in effect from saturday morning through sunday
morning...

.rest of tonight...west winds 15 to 25 knots becoming northwest
gales to 35 knots by midnight, then becoming north gales to
45 knots late. patchy fog late in the evening, then freezing
spray after midnight. rain likely, possibly mixed with snow late
in the evening, then snow, possibly mixed with rain after
midnight. waves 2 to 4 feet building to 10 to 14 feet
occasionally to 18 feet. 
.friday...north gales to 45 knots diminishing to 20 to 30 knots
by mid afternoon. freezing spray. snow in the morning. a slight
chance of snow showers in the afternoon. waves building to 11 to
15 feet occasionally to 19 feet, then subsiding to 4 to 7 feet
occasionally to 9 feet. 
.friday night...north winds 10 to 20 knots becoming south 15 to
25 knots by midnight, then increasing to 20 to 30 knots late.
snow likely after midnight. waves subsiding to 1 to 3 feet, then
building to 5 to 8 feet occasionally to 10 feet. 
.saturday...south winds 20 to 30 knots becoming west gales to
40 knots in the afternoon. snow. waves building to 11 to 15 feet
occasionally to 19 feet. 
.saturday night...west gales to 40 knots veering northwest after
midnight. freezing spray. snow showers. waves building to 15 to
20 feet occasionally to 25 feet, then subsiding to 12 to 17 feet
occasionally to 21 feet. 
.sunday...northwest gales to 35 knots diminishing to 15 to
25 knots in the afternoon. freezing spray in the morning. waves
subsiding to 3 to 6 feet occasionally to 8 feet. 
.sunday night...west winds 15 to 25 knots backing southwest after
midnight. a chance of snow showers. waves subsiding to 2 to
4 feet. 
.monday...south winds 15 to 25 knots increasing to 20 to
30 knots. a chance of snow showers. waves building to 3 to 5 feet
occasionally to 7 feet. 
.tuesday...west winds 20 to 30 knots becoming north 15 to
25 knots. 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 190301
glfls 
expires:202512190900;;834151

open lake forecast for lake superior
national weather service marquette mi
1000 pm est thu dec 18 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 29.1 inch clipper lifts northeast away from the lake tonight 
before reaching northern quebec friday morning. a 29.9 inch ridge 
then returns to the lake on friday via a 30.2 inch high over the 
lower mississippi valley and a weakening 29.9 inch high over 
northern ontario. another low pressure of around 29.3 inches tracks 
north of lake superior on saturday. this is then followed by a 30.3 
inch high over the canadian prairies sliding southeast into the ohio 
river valley late this weekend, building to 30.7 inches by monday 
morning. lake superior will remain under the influence of this high 
into monday night.



lsz162-190900-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 pm est thu dec 18 2025 /900 pm cst thu dec 18 2025/

...gale warning in effect until 4 am est /3 am cst/ friday...
...heavy freezing spray warning in effect until 8 am est /7 am
cst/ friday...
...gale watch in effect from saturday morning through late
saturday night...

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

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 190301
glfls 
expires:202512190900;;834153

open lake forecast for lake superior
national weather service marquette mi
1000 pm est thu dec 18 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 29.1 inch clipper lifts northeast away from the lake tonight 
before reaching northern quebec friday morning. a 29.9 inch ridge 
then returns to the lake on friday via a 30.2 inch high over the 
lower mississippi valley and a weakening 29.9 inch high over 
northern ontario. another low pressure of around 29.3 inches tracks 
north of lake superior on saturday. this is then followed by a 30.3 
inch high over the canadian prairies sliding southeast into the ohio 
river valley late this weekend, building to 30.7 inches by monday 
morning. lake superior will remain under the influence of this high 
into monday night.



lsz264-190900-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
1000 pm est thu dec 18 2025

...storm warning in effect until 7 am est friday...
...heavy freezing spray warning in effect until 8 am est friday...
...gale watch in effect from saturday morning through late
saturday night...

.rest of tonight...north storm force winds to 55 knots
diminishing to gales to 45 knots late. heavy freezing spray.
snow. waves 10 to 14 feet occasionally to 18 feet building to
12 to 17 feet occasionally to 21 feet. 
.friday...north gales to 45 knots diminishing to 10 to 20 knots
by mid afternoon. heavy freezing spray. a chance of snow. waves
subsiding to 2 to 4 feet. 
.friday night...south winds 10 to 20 knots increasing to 20 to
30 knots by midnight. a chance of snow in the evening, then snow
likely after midnight. waves subsiding to calm to 2 feet, then
building to 6 to 9 feet occasionally to 11 feet. 
.saturday...southwest gales to 40 knots veering west in the
afternoon. a chance of snow. freezing spray in the afternoon.
waves building to 12 to 17 feet occasionally to 21 feet. 
.saturday night...northwest gales to 45 knots. a slight chance of
snow showers in the evening. heavy freezing spray. waves
subsiding to 8 to 11 feet occasionally to 14 feet. 
.sunday...northwest winds 20 to 30 knots becoming west 10 to
20 knots in the afternoon. freezing spray in the morning. waves
subsiding to 1 to 3 feet. 
.sunday night...west winds 5 to 15 knots backing southwest after
midnight. waves 1 to 3 feet. 
.monday...south winds 10 to 20 knots. a chance of snow showers.
waves building to 3 to 5 feet occasionally to 7 feet. 
.tuesday...northwest winds 15 to 25 knots becoming north 10 to
20 knots. waves building to 3 to 6 feet occasionally to 8 feet,
then subsiding to 1 to 3 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 190301
glfls 
expires:202512190900;;834154

open lake forecast for lake superior
national weather service marquette mi
1000 pm est thu dec 18 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 29.1 inch clipper lifts northeast away from the lake tonight 
before reaching northern quebec friday morning. a 29.9 inch ridge 
then returns to the lake on friday via a 30.2 inch high over the 
lower mississippi valley and a weakening 29.9 inch high over 
northern ontario. another low pressure of around 29.3 inches tracks 
north of lake superior on saturday. this is then followed by a 30.3 
inch high over the canadian prairies sliding southeast into the ohio 
river valley late this weekend, building to 30.7 inches by monday 
morning. lake superior will remain under the influence of this high 
into monday night.



lsz265-190900-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
1000 pm est thu dec 18 2025

...storm warning in effect until 10 am est friday...
...heavy freezing spray warning in effect until 10 am est
friday...
...gale watch in effect from saturday morning through sunday
morning...

.rest of tonight...north gales to 45 knots increasing to storm
force winds to 55 knots by midnight. heavy freezing spray. snow.
waves 6 to 9 feet occasionally to 11 feet building to 15 to
20 feet occasionally to 25 feet. 
.friday...north storm force winds to 55 knots diminishing to
gales to 35 knots by late morning, then becoming northwest 15 to
25 knots by mid afternoon. freezing spray. a chance of snow
showers. waves subsiding to 3 to 6 feet occasionally to 8 feet. 
.friday night...south winds 10 to 20 knots increasing to gales to
35 knots. a slight chance of snow in the evening, then snow
likely after midnight. freezing spray after midnight. waves
subsiding to 2 to 4 feet, then building to 5 to 8 feet
occasionally to 10 feet. 
.saturday...southwest gales to 35 knots becoming west gales to
45 knots in the afternoon. a chance of snow. freezing spray in
the afternoon. waves subsiding to 3 to 6 feet occasionally to
8 feet, then building to 10 to 14 feet occasionally to 18 feet. 
.saturday night...northwest gales to 45 knots. freezing spray. a
chance of snow showers. waves subsiding to 9 to 12 feet
occasionally to 15 feet. 
.sunday...northwest gales to 35 knots becoming west 15 to
25 knots in the afternoon. freezing spray in the morning. waves
subsiding to 1 to 3 feet. 
.sunday night...west winds 10 to 20 knots backing southwest after
midnight. waves subsiding to calm to 2 feet. 
.monday...south winds 15 to 25 knots. a chance of snow showers.
waves building to 1 to 3 feet. 
.tuesday...northwest winds 20 to 30 knots diminishing to 10 to
20 knots. waves building to 2 to 4 feet, then subsiding to 1 to
3 feet. 

note, wave height forecasts are for ice free areas.

$$