fzus63 kdtx 190837
glflh 
expires:202512191645;;847402

open lake forecast for lake huron
national weather service detroit/pontiac mi
337 am est fri dec 19 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...strong northwest winds persist through the day as low
pressure, 29.10 inches, advances toward eastern canada. gale
warnings remain up for all of lake huron today with brief gales
possible over the southern great lakes this afternoon. high
pressure, 30.00 inches, then briefly follows late today into
early saturday. another arctic cold front saturday night offers
additional chances for gales.


lhz361-362-191645-
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-
337 am est fri dec 19 2025

...gale warning in effect through this evening...

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


$$

fzus63 kdtx 190837
glflh 
expires:202512191645;;847403

open lake forecast for lake huron
national weather service detroit/pontiac mi
337 am est fri dec 19 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...strong northwest winds persist through the day as low
pressure, 29.10 inches, advances toward eastern canada. gale
warnings remain up for all of lake huron today with brief gales
possible over the southern great lakes this afternoon. high
pressure, 30.00 inches, then briefly follows late today into
early saturday. another arctic cold front saturday night offers
additional chances for gales.


lhz363-462-191645-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
lake huron from port austin to harbor beach beyond 5nm off shore-
337 am est fri dec 19 2025

...gale warning in effect through this evening...

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


$$

fzus63 kmkx 190842
glflm 
expires:202512191615;;847607

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
242 am cst fri dec 19 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...

29.0 inch low pressure is centered near the ontario-quebec border
early this morning, leading to gusty northwest winds across the 
open waters. gusty conditions will continue into this morning and 
afternoon. gale warnings remain in effect until 12 pm cst over the
southern two-thirds of lake michigan, and until 3 pm cst over the
northern third. areas of snow showers will continue on the back 
side of the low through this afternoon. winds will subside from 
late afternoon through the first half of this evening as a narrow 
area of 30.0 inch high pressure approaches and crosses the open 
waters. areas of moderate freezing spray will continue into this 
afternoon, with conditions improving by this evening.

high pressure will quickly shift east of lake michigan tonight, 
bringing a southerly wind shift to the open waters. southerly winds 
will quickly become gusty by daybreak saturday as 29.4 inch low 
pressure moves into southwestern ontario. winds may briefly 
approach gale force over the southern third of lake michigan 
during the early morning hours saturday, though any such gusts 
aren't expected to be widespread enough to justify headlines at 
this time. the low will progress toward the ontario-quebec border 
saturday night, bringing a gusty northwest wind shift to the open 
waters. widespread gale force gusts are anticipated during this 
time frame, particularly over the northern two-thirds of the 
waters. a gale watch has thus been issued between 3 pm cst 
saturday and 3 am sunday for the northern two-thirds of lake 
michigan. winds will taper sunday morning as 30.5 inch high 
pressure moves into the upper midwest. periods of snow showers & 
light to moderate freezing spray will accompany the passing low 
saturday & saturday night.


lmz261-362-364-563-191615-
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-
242 am cst fri dec 19 2025

sturgeon bay wi to point betsie mi north...

...gale warning in effect until 2 pm cst this afternoon...
...gale watch in effect from saturday afternoon through late
saturday night...

.today...northwest gales to 35 kt diminishing to 30 kt. freezing
spray. chance of snow this morning, then slight chance of snow
this afternoon. waves 8 to 11 ft occasionally to 14 ft subsiding
to 5 to 8 ft occasionally to 10 ft. 
.tonight...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 12 ft occasionally to
16 ft. 
.saturday...southwest winds to 30 kt becoming west gales to
35 kt. snow likely in the morning, then chance of snow and light
freezing rain in the afternoon. waves 10 to 14 ft occasionally to
18 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 becoming west 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 20 kt becoming southwest. waves
2 to 4 ft. 
.monday...southwest winds 15 to 25 kt becoming south. 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. waves 4 to 6 ft occasionally
to 8 ft subsiding to 2 to 4 ft.  

$$

fzus63 kmkx 190842
glflm 
expires:202512191615;;847608

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
242 am cst fri dec 19 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...

29.0 inch low pressure is centered near the ontario-quebec border
early this morning, leading to gusty northwest winds across the 
open waters. gusty conditions will continue into this morning and 
afternoon. gale warnings remain in effect until 12 pm cst over the
southern two-thirds of lake michigan, and until 3 pm cst over the
northern third. areas of snow showers will continue on the back 
side of the low through this afternoon. winds will subside from 
late afternoon through the first half of this evening as a narrow 
area of 30.0 inch high pressure approaches and crosses the open 
waters. areas of moderate freezing spray will continue into this 
afternoon, with conditions improving by this evening.

high pressure will quickly shift east of lake michigan tonight, 
bringing a southerly wind shift to the open waters. southerly winds 
will quickly become gusty by daybreak saturday as 29.4 inch low 
pressure moves into southwestern ontario. winds may briefly 
approach gale force over the southern third of lake michigan 
during the early morning hours saturday, though any such gusts 
aren't expected to be widespread enough to justify headlines at 
this time. the low will progress toward the ontario-quebec border 
saturday night, bringing a gusty northwest wind shift to the open 
waters. widespread gale force gusts are anticipated during this 
time frame, particularly over the northern two-thirds of the 
waters. a gale watch has thus been issued between 3 pm cst 
saturday and 3 am sunday for the northern two-thirds of lake 
michigan. winds will taper sunday morning as 30.5 inch high 
pressure moves into the upper midwest. periods of snow showers & 
light to moderate freezing spray will accompany the passing low 
saturday & saturday night.


lmz366-565-567-868-191615-
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-
242 am cst fri dec 19 2025

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

...gale warning in effect until noon cst today...
...gale watch in effect from saturday afternoon through late
saturday night...

.today...northwest gales to 35 kt diminishing to 15 to 25 kt.
chance of snow and slight chance of light freezing rain this
morning. freezing spray. waves 10 to 14 ft occasionally to 18 ft
subsiding to 5 to 8 ft occasionally to 10 ft. 
.tonight...west 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. slight chance of snow overnight. waves 3 to
5 ft building to 8 to 12 ft occasionally to 16 ft. 
.saturday...southwest winds to 30 kt becoming west gales to
35 kt. chance of snow. 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 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...southwest winds 10 to 15 kt increasing to 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 190842
glflm 
expires:202512191615;;847609

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
242 am cst fri dec 19 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...

29.0 inch low pressure is centered near the ontario-quebec border
early this morning, leading to gusty northwest winds across the 
open waters. gusty conditions will continue into this morning and 
afternoon. gale warnings remain in effect until 12 pm cst over the
southern two-thirds of lake michigan, and until 3 pm cst over the
northern third. areas of snow showers will continue on the back 
side of the low through this afternoon. winds will subside from 
late afternoon through the first half of this evening as a narrow 
area of 30.0 inch high pressure approaches and crosses the open 
waters. areas of moderate freezing spray will continue into this 
afternoon, with conditions improving by this evening.

high pressure will quickly shift east of lake michigan tonight, 
bringing a southerly wind shift to the open waters. southerly winds 
will quickly become gusty by daybreak saturday as 29.4 inch low 
pressure moves into southwestern ontario. winds may briefly 
approach gale force over the southern third of lake michigan 
during the early morning hours saturday, though any such gusts 
aren't expected to be widespread enough to justify headlines at 
this time. the low will progress toward the ontario-quebec border 
saturday night, bringing a gusty northwest wind shift to the open 
waters. widespread gale force gusts are anticipated during this 
time frame, particularly over the northern two-thirds of the 
waters. a gale watch has thus been issued between 3 pm cst 
saturday and 3 am sunday for the northern two-thirds of lake 
michigan. winds will taper sunday morning as 30.5 inch high 
pressure moves into the upper midwest. periods of snow showers & 
light to moderate freezing spray will accompany the passing low 
saturday & saturday night.


lmz669-671-673-675-870-872-874-876-191615-
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 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-
242 am cst fri dec 19 2025

sheboygan wi to pentwater mi south to winthrop harbor il to south
haven mi...

...gale warning in effect until noon cst today...
...gale watch in effect from saturday afternoon through late
saturday night...

.today...northwest gales to 40 kt becoming west 15 to 25 kt.
freezing spray. chance of snow and slight chance of light
freezing rain this morning, then slight chance of light freezing
rain this afternoon. waves 12 to 16 ft occasionally to 21 ft
subsiding to 8 to 11 ft occasionally to 14 ft. 
.tonight...west 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 7 ft occasionally to 9 ft
building to 8 to 12 ft occasionally to 16 ft. 
.saturday...southwest winds to 30 kt becoming west gales to
35 kt. chance of snow in the morning, then chance of snow and
rain in the afternoon. 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.
freezing spray overnight. 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 8 to 12 ft
occasionally to 16 ft subsiding to 5 to 8 ft occasionally to
10 ft. 
.sunday night...southwest 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 becoming northwest. waves 4 to
7 ft occasionally to 9 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 190900
glfls 
expires:202512192100;;848177

open lake forecast for lake superior
national weather service marquette mi
400 am est fri dec 19 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...

behind a 29.0 inch clipper lifting from northern ontario into 
northern northern quebec this morning, a 29.9 inch ridge moves over 
lake superior by late this afternoon via a 30.2 inch high over the 
lower mississippi valley and a weakening 29.9 inch high moving 
across northern ontario. a low pressure of around 29.3 inches then 
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 as it continues towards the mid-atlantic. lake 
superior remains under the influence of this high until a weakening 
29.9 inch low moves across the lake monday night through tuesday 
morning. afterwards, a 30.3 inch high pressure moves over lake 
superior from the canadian prairies tuesday night.



lsz267-192100-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
400 am est fri dec 19 2025

...gale warning in effect until 3 pm est this afternoon...
...heavy freezing spray warning in effect until 1 pm est this
afternoon...
...gale watch in effect from late tonight through sunday
morning...

.early this morning...north gales to 40 knots. freezing spray.
snow showers. waves 9 to 12 feet occasionally to 15 feet building
to 10 to 14 feet occasionally to 18 feet. 
.today...north gales to 45 knots diminishing to 20 to 30 knots by
mid afternoon. freezing spray. snow showers in the morning. a
slight chance of snow showers in the afternoon. waves subsiding
to 5 to 8 feet occasionally to 10 feet. 
.tonight...north winds 10 to 20 knots becoming south 20 to
30 knots by midnight, then increasing to gales to 35 knots late.
a slight chance of snow showers after midnight. waves subsiding
to 2 to 4 feet, then building to 7 to 10 feet occasionally to
13 feet. 
.saturday...south gales to 35 knots becoming west gales to
40 knots by mid afternoon. snow showers. waves subsiding to 6 to
9 feet occasionally to 11 feet, then building to 12 to 17 feet
occasionally to 21 feet. 
.saturday night...northwest gales to 45 knots. freezing spray.
snow showers. waves building to 15 to 20 feet occasionally to
25 feet, then subsiding to 11 to 15 feet occasionally to 19 feet.
.sunday...northwest winds 20 to 30 knots diminishing to 15 to
25 knots in the afternoon. freezing spray in the morning. a
chance of snow showers. waves subsiding to 3 to 6 feet
occasionally to 8 feet. 
.sunday night...west winds 15 to 25 knots becoming southwest
20 to 30 knots after midnight. a chance of snow showers. waves
subsiding to 3 to 6 feet occasionally to 8 feet. 
.monday...southwest winds 20 to 30 knots becoming south 15 to
25 knots. a chance of snow showers, then snow showers likely.
waves subsiding to 2 to 4 feet. 
.tuesday...west winds 20 to 30 knots becoming northwest 15 to
25 knots. waves building to 4 to 7 feet occasionally to 9 feet,
then subsiding to 1 to 3 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 190900
glfls 
expires:202512192100;;848172

open lake forecast for lake superior
national weather service marquette mi
400 am est fri dec 19 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...

behind a 29.0 inch clipper lifting from northern ontario into 
northern northern quebec this morning, a 29.9 inch ridge moves over 
lake superior by late this afternoon via a 30.2 inch high over the 
lower mississippi valley and a weakening 29.9 inch high moving 
across northern ontario. a low pressure of around 29.3 inches then 
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 as it continues towards the mid-atlantic. lake 
superior remains under the influence of this high until a weakening 
29.9 inch low moves across the lake monday night through tuesday 
morning. afterwards, a 30.3 inch high pressure moves over lake 
superior from the canadian prairies tuesday night.



lsz162-192100-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am est fri dec 19 2025 /300 am cst fri dec 19 2025/

...heavy freezing spray warning in effect until 11 am est /10 am
cst/ this morning...
...gale watch in effect from saturday morning through late
saturday night...

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

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 190900
glfls 
expires:202512192100;;848173

open lake forecast for lake superior
national weather service marquette mi
400 am est fri dec 19 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...

behind a 29.0 inch clipper lifting from northern ontario into 
northern northern quebec this morning, a 29.9 inch ridge moves over 
lake superior by late this afternoon via a 30.2 inch high over the 
lower mississippi valley and a weakening 29.9 inch high moving 
across northern ontario. a low pressure of around 29.3 inches then 
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 as it continues towards the mid-atlantic. lake 
superior remains under the influence of this high until a weakening 
29.9 inch low moves across the lake monday night through tuesday 
morning. afterwards, a 30.3 inch high pressure moves over lake 
superior from the canadian prairies tuesday night.



lsz263-192100-
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 am est fri dec 19 2025

...gale warning in effect until 8 am est this morning...
...heavy freezing spray warning in effect until 11 am est this
morning...
...gale watch in effect from late tonight through late saturday
night...

.early this morning...north gales to 40 knots. heavy freezing
spray. a chance of snow showers. waves 11 to 15 feet occasionally
to 19 feet subsiding to 10 to 14 feet occasionally to 18 feet. 
.today...north gales to 35 knots diminishing to 15 to 25 knots by
late morning, then becoming south 5 to 15 knots by mid afternoon.
heavy freezing spray in the morning. a slight chance of snow
showers in the morning. waves subsiding to 1 to 3 feet. 
.tonight...south winds 20 to 30 knots increasing to gales to
35 knots by midnight, then veering southwest late. a slight
chance of snow showers in the evening, then snow showers after
midnight. waves building to 7 to 10 feet occasionally to 13 feet.
.saturday...southwest gales to 40 knots becoming west gales to
45 knots. a chance of snow showers. freezing spray in the
afternoon. waves building to 12 to 17 feet occasionally to
21 feet. 
.saturday night...northwest gales to 45 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 10 to 20 knots. waves building to
2 to 4 feet. 
.monday...south winds 10 to 20 knots veering southwest. a chance
of snow showers. waves subsiding to 1 to 3 feet, then building to
2 to 4 feet. 
.tuesday...west winds 10 to 20 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 190900
glfls 
expires:202512192100;;848174

open lake forecast for lake superior
national weather service marquette mi
400 am est fri dec 19 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...

behind a 29.0 inch clipper lifting from northern ontario into 
northern northern quebec this morning, a 29.9 inch ridge moves over 
lake superior by late this afternoon via a 30.2 inch high over the 
lower mississippi valley and a weakening 29.9 inch high moving 
across northern ontario. a low pressure of around 29.3 inches then 
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 as it continues towards the mid-atlantic. lake 
superior remains under the influence of this high until a weakening 
29.9 inch low moves across the lake monday night through tuesday 
morning. afterwards, a 30.3 inch high pressure moves over lake 
superior from the canadian prairies tuesday night.



lsz264-192100-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
400 am est fri dec 19 2025

...gale warning in effect until 11 am est this morning...
...heavy freezing spray warning in effect until 11 am est this
morning...
...gale watch in effect from late tonight through late saturday
night...

.early this morning...north gales to 40 knots. heavy freezing
spray. snow showers. waves 12 to 17 feet occasionally to 21 feet.
.today...north gales to 40 knots diminishing to 10 to 20 knots. a
slight chance of snow showers in the morning. heavy freezing
spray. waves subsiding to 3 to 5 feet occasionally to 7 feet. 
.tonight...south winds 15 to 25 knots increasing to gales to
35 knots by midnight. a slight chance of snow showers in the
evening, then snow showers after midnight. waves subsiding to
1 to 3 feet, then building to 8 to 11 feet occasionally to
14 feet. 
.saturday...southwest gales to 40 knots becoming west gales to
45 knots. a chance of snow showers. freezing spray in the
afternoon. waves building to 12 to 17 feet occasionally to
21 feet. 
.saturday night...northwest gales to 45 knots. heavy freezing
spray. a slight chance of snow showers. waves subsiding to 7 to
10 feet occasionally to 13 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 10 to 20 knots backing southwest after
midnight. waves building to 2 to 4 feet. 
.monday...south winds 10 to 20 knots veering southwest. a chance
of snow showers. waves subsiding to 1 to 3 feet, then building to
2 to 4 feet. 
.tuesday...northwest winds 15 to 25 knots becoming north 10 to
20 knots. waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to calm to 2 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 190900
glfls 
expires:202512192100;;848175

open lake forecast for lake superior
national weather service marquette mi
400 am est fri dec 19 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...

behind a 29.0 inch clipper lifting from northern ontario into 
northern northern quebec this morning, a 29.9 inch ridge moves over 
lake superior by late this afternoon via a 30.2 inch high over the 
lower mississippi valley and a weakening 29.9 inch high moving 
across northern ontario. a low pressure of around 29.3 inches then 
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 as it continues towards the mid-atlantic. lake 
superior remains under the influence of this high until a weakening 
29.9 inch low moves across the lake monday night through tuesday 
morning. afterwards, a 30.3 inch high pressure moves over lake 
superior from the canadian prairies tuesday night.



lsz265-192100-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
400 am est fri dec 19 2025

...gale warning in effect until 1 pm est this afternoon...
...heavy freezing spray warning in effect until 1 pm est this
afternoon...
...gale watch in effect from saturday morning through sunday
morning...

.early this morning...north gales to 45 knots with a few storm
force gusts to 50 knots possible. heavy freezing spray. snow
showers. waves 12 to 17 feet occasionally to 21 feet. 
.today...north gales to 45 knots becoming northwest 15 to
25 knots by mid afternoon. heavy freezing spray. a chance of snow
showers. waves building to 15 to 20 feet occasionally to 25 feet,
then subsiding to 4 to 7 feet occasionally to 9 feet. 
.tonight...south winds 10 to 20 knots increasing to gales to
35 knots. a chance of snow showers. freezing spray after
midnight. waves subsiding to 2 to 4 feet, then building to 6 to
9 feet occasionally to 11 feet. 
.saturday...southwest gales to 35 knots becoming west gales to
45 knots. snow showers likely. freezing spray in the afternoon.
waves building to 9 to 12 feet occasionally to 15 feet. 
.saturday night...northwest gales to 45 knots. freezing spray. a
chance of snow showers. waves subsiding to 6 to 9 feet
occasionally to 11 feet. 
.sunday...northwest winds 20 to 30 knots becoming west 15 to
25 knots in the afternoon. freezing spray in the morning. waves
subsiding to 1 to 3 feet. 
.sunday night...southwest winds 10 to 20 knots increasing to
15 to 25 knots 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...west winds 20 to 30 knots becoming northwest 10 to
20 knots. waves building to 2 to 4 feet, then subsiding to calm
to 2 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 190900
glfls 
expires:202512192100;;848176

open lake forecast for lake superior
national weather service marquette mi
400 am est fri dec 19 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...

behind a 29.0 inch clipper lifting from northern ontario into 
northern northern quebec this morning, a 29.9 inch ridge moves over 
lake superior by late this afternoon via a 30.2 inch high over the 
lower mississippi valley and a weakening 29.9 inch high moving 
across northern ontario. a low pressure of around 29.3 inches then 
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 as it continues towards the mid-atlantic. lake 
superior remains under the influence of this high until a weakening 
29.9 inch low moves across the lake monday night through tuesday 
morning. afterwards, a 30.3 inch high pressure moves over lake 
superior from the canadian prairies tuesday night.



lsz266-192100-
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 am est fri dec 19 2025

...gale warning in effect until 2 pm est this afternoon...
...heavy freezing spray warning in effect until 1 pm est this
afternoon...
...gale watch in effect from late tonight through sunday
morning...

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

note, wave height forecasts are for ice free areas.

$$