fzus63 kdtx 180828
glflh 
expires:202602181630;;830693

open lake forecast for lake huron
national weather service detroit/pontiac mi
328 am est wed feb 18 2026

for waters beyond five nautical miles off shore on lake huron

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...an approaching low pressure system brings gusts to 
gales over the northern half of lake huron this morning. this 
system also produces a period of rainfall, possibly mixed with 
snow over the northern waterways. a brief lull ensues thursday, 
followed by potential for additional gusts to gales over northern 
lake huron friday.


lhz361-362-181630-
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-
328 am est wed feb 18 2026

...gale warning in effect through this afternoon...

.today...east at 35 knot gales decreasing to 30 knots in the
afternoon. gusts to 40 knot gales. snow...freezing rain and rain
in the morning...then snow in the afternoon. patchy fog. areas of
dense freezing fog in the afternoon. waves 12 to 16 feet. waves
occasionally around 20 feet. 
.tonight...east winds to 30 knots with gusts to 35 knot gales
decreasing to 20 to 25 knots with gusts to around 30 knots after
midnight. a chance of snow in the evening. waves 10 to 14 feet.
waves occasionally around 18 feet. 
.thursday...east winds 15 to 20 knots. waves 6 to 9 feet. waves
occasionally around 12 feet. 
.thursday night...east winds 20 to 25 knots with gusts to around
30 knots increasing to 30 knots with gusts to 35 knot gales after
midnight. a chance of rain and snow after midnight. waves 8 to
12 feet. waves occasionally around 15 feet. 
.friday...east winds to 30 knots with gusts to 35 knot gales
decreasing to 20 to 25 knots with gusts to around 30 knots late
in the morning...then decreasing to 15 to 20 knots late in the
afternoon becoming east 15 to 20 knots late in the evening. rain
and snow likely...then a chance of snow late in the afternoon.
waves 8 to 12 feet subsiding to 4 to 6 feet late in the evening.
waves occasionally around 15 feet. 
.saturday...north winds 10 to 15 knots increasing to 15 to
20 knots by midnight. waves 3 to 5 feet. 
.sunday...north winds 15 to 20 knots increasing to 20 to 25 knots
by midnight. waves 6 to 9 feet. waves occasionally around
12 feet. 

wave heights are for ice free areas.

$$

fzus63 kdtx 180828
glflh 
expires:202602181630;;830694

open lake forecast for lake huron
national weather service detroit/pontiac mi
328 am est wed feb 18 2026

for waters beyond five nautical miles off shore on lake huron

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...an approaching low pressure system brings gusts to 
gales over the northern half of lake huron this morning. this 
system also produces a period of rainfall, possibly mixed with 
snow over the northern waterways. a brief lull ensues thursday, 
followed by potential for additional gusts to gales over northern 
lake huron friday.


lhz363-181630-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
328 am est wed feb 18 2026

.today...east winds 20 to 25 knots with gusts to around 30 knots
decreasing to 15 to 20 knots late in the afternoon. rain and
freezing rain in the morning...then rain and snow in the
afternoon. widespread fog. 
.tonight...east winds 15 to 20 knots decreasing to 10 to 15 knots
in the late evening and overnight. 
.thursday...southeast winds 10 to 15 knots. 
.thursday night...east winds 15 to 20 knots. a chance of rain
after midnight. 
.friday...east winds 15 to 20 knots veering to the south late in
the afternoon...then becoming west 10 to 15 knots late in the
evening. rain likely in the morning...then a chance of rain late
in the morning. 
.saturday...west winds 10 to 15 knots decreasing to 5 to 10 knots
early in the evening...then becoming west 5 to 10 knots by
midnight. 
.sunday...north winds 15 to 20 knots increasing to 20 to 25 knots
by midnight. 

waves omitted due to ice coverage.

$$

fzus63 kdtx 180828
glflh 
expires:202602181630;;830695

open lake forecast for lake huron
national weather service detroit/pontiac mi
328 am est wed feb 18 2026

for waters beyond five nautical miles off shore on lake huron

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...an approaching low pressure system brings gusts to 
gales over the northern half of lake huron this morning. this 
system also produces a period of rainfall, possibly mixed with 
snow over the northern waterways. a brief lull ensues thursday, 
followed by potential for additional gusts to gales over northern 
lake huron friday.


lhz462>464-181630-
lake huron from port austin to harbor beach beyond 5nm off shore-
lake huron from harbor beach to port sanilac beyond 5nm off shore-
lake huron from port sanilac to port huron beyond 5nm off shore-
328 am est wed feb 18 2026

...dense fog advisory in effect until 10 am est this morning...

.today...east winds 15 to 20 knots increasing to 20 to 25 knots
late in the morning...then decreasing to 15 to 20 knots early in
the afternoon becoming southeast 10 to 15 knots late in the
afternoon. rain. widespread dense fog. 
.tonight...southeast winds 10 to 15 knots. 
.thursday...southeast winds 10 to 15 knots. 
.thursday night...east winds 10 to 15 knots increasing to 15 to
20 knots in the late evening and overnight. a chance of rain in
the evening...then rain likely after midnight. 
.friday...southeast winds 15 to 20 knots veering to the southwest
late in the afternoon...then becoming west 10 to 15 knots late in
the evening. rain likely. 
.saturday...west winds 10 to 15 knots decreasing to 5 to 10 knots
until early evening...then becoming northwest 10 to 15 knots by
midnight. 
.sunday...northwest winds 10 to 15 knots becoming north 20 to
25 knots. a chance of snow. 

waves omitted due to ice coverage.

$$

fzus63 kmkx 180905
glflm 
expires:202602181615;;832422

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
305 am cst wed feb 18 2026

for waters beyond five nautical miles of shore on lake michigan.

waves are provided as a range of significant wave heights, which
is the average of the highest 1/3 of the wave, along with the
average height of the highest 10% of the waves which will
occasionally be encountered.

.synopsis...

high-end, easterly gales are expected through this morning into 
this afternoon over the northern half of the lake as low pressure
of 29.1 inches approaches duluth today. a gale warning remains in
effect over the northern half of the lake. the warmer airmass 
over the chilly lake waters should limit the mixing down of higher
gusts any further south.

winds will ease this evening into thursday and become southerly 
as that low occludes and weakens to 29.5 inches over northern 
minnesota. winds will increase thursday night into friday night as
another strong low pressure system around 29.2 inches tracks from
iowa into central wisconsin. that low will cross northern or 
central lake michigan friday morning and gradually weaken through 
saturday. gusty northerly winds are expected sunday into monday.


lmz261-362-364-366-563-565-567-868-181615-
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-
305 am cst wed feb 18 2026

sheboygan wi to pentwater mi north...

...gale warning in effect through this afternoon...

.today...southeast gales to 45 kt becoming south gales to 40 kt.
rain, snow, freezing rain and slight chance of sleet this
morning, then chance of rain and light freezing rain this
afternoon. waves 10 to 14 ft occasionally to 18 ft subsiding to
6 to 9 ft occasionally to 12 ft. 
.tonight...southeast gales to 40 kt diminishing to 30 kt. chance
of rain, light freezing rain and snow. waves 5 to 8 ft
occasionally to 10 ft subsiding to 4 to 6 ft occasionally to
8 ft. 
.thursday...southeast winds to 30 kt becoming east. waves 3 to
5 ft. 
.thursday night...east winds to 30 kt. chance of rain in the
evening, then rain likely with a chance of light freezing rain
overnight. waves 4 to 6 ft occasionally to 8 ft. 
.friday...southeast winds to 30 kt backing to northwest 15 to
25 kt. rain and snow likely in the morning, then chance of snow
and rain in the afternoon. waves 6 to 9 ft occasionally to 12 ft.
.friday night...northwest winds 15 to 25 kt. waves 5 to 8 ft
occasionally to 10 ft subsiding to 4 to 6 ft occasionally to
8 ft. 
.saturday...northwest winds 10 to 20 kt. waves 3 to 5 ft. 
.sunday...north winds to 30 kt. waves 7 to 10 ft occasionally to
13 ft building to 8 to 11 ft occasionally to 14 ft.  

$$

fzus63 kmkx 180905
glflm 
expires:202602181615;;832423

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
305 am cst wed feb 18 2026

for waters beyond five nautical miles of shore on lake michigan.

waves are provided as a range of significant wave heights, which
is the average of the highest 1/3 of the wave, along with the
average height of the highest 10% of the waves which will
occasionally be encountered.

.synopsis...

high-end, easterly gales are expected through this morning into 
this afternoon over the northern half of the lake as low pressure
of 29.1 inches approaches duluth today. a gale warning remains in
effect over the northern half of the lake. the warmer airmass 
over the chilly lake waters should limit the mixing down of higher
gusts any further south.

winds will ease this evening into thursday and become southerly 
as that low occludes and weakens to 29.5 inches over northern 
minnesota. winds will increase thursday night into friday night as
another strong low pressure system around 29.2 inches tracks from
iowa into central wisconsin. that low will cross northern or 
central lake michigan friday morning and gradually weaken through 
saturday. gusty northerly winds are expected sunday into monday.


lmz080-669-671-673-675-777-779-870-872-874-876-878-181615-
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-
305 am cst wed feb 18 2026

sheboygan wi to pentwater mi south...

.today...south winds to 30 kt becoming southwest. chance of rain
this morning. waves 7 to 10 ft occasionally to 13 ft subsiding to
4 to 6 ft occasionally to 8 ft. 
.tonight...southwest winds 10 to 20 kt diminishing to 10 to 15 kt
late in the evening, then becoming south 5 to 10 kt after
midnight becoming southeast 10 to 15 kt late. waves 3 to 5 ft
subsiding to 2 to 4 ft. 
.thursday...southeast winds 10 to 15 kt becoming east 10 to
20 kt. chance of rain in the afternoon. waves 2 to 4 ft. 
.thursday night...east winds 10 to 20 kt becoming south 15 to
25 kt. rain in the evening, then rain likely overnight. waves
4 to 6 ft occasionally to 8 ft building to 4 to 7 ft occasionally
to 9 ft. 
.friday...southwest winds to 30 kt becoming west. chance of rain
and snow in the morning. waves 8 to 12 ft occasionally to 16 ft. 
.friday night...west winds to 30 kt diminishing to 15 to 25 kt.
waves 7 to 10 ft occasionally to 13 ft subsiding to 5 to 8 ft
occasionally to 10 ft. 
.saturday...northwest winds 15 to 25 kt diminishing to 10 to
20 kt. waves 4 to 6 ft occasionally to 8 ft subsiding to 3 to
5 ft. 
.sunday...northwest winds to 30 kt. chance of snow. waves 10 to
14 ft occasionally to 18 ft.  

$$

fzus63 kmqt 180901
glfls 
expires:202602182100;;832010

open lake forecast for lake superior
national weather service marquette mi
400 am est wed feb 18 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

29.7 inch troughing will persist over lake superior through thursday 
as a 29.3 inch low over minnesota this morning moves east to upper 
michigan and weakens to 29.6 inches through thursday morning. 
pressure will then steadily fall to around 29.4 inches over the lake 
thursday night through friday as a second 29.3 inch low over 
missouri thursday afternoon tracks to northern lake michigan at 29.2 
inches by friday afternoon. pressure then increases to around 30.1 
inches over lake superior through the weekend as the low dissipates 
over the lower great lakes.



lsz162-182100-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am est wed feb 18 2026 /300 am cst wed feb 18 2026/

...storm warning in effect through this evening...

.early this morning...east storm force winds to 55 knots. snow,
possibly mixed with sleet. waves 7 to 10 feet occasionally to
13 feet. 
.today...east storm force winds to 55 knots diminishing to gales
to 45 knots by mid afternoon. snow. waves building to 7 to
11 feet occasionally to 14 feet. 
.tonight...east gales to 45 knots. snow showers likely. waves
subsiding to 5 to 8 feet occasionally to 10 feet. 
.thursday...east gales to 35 knots diminishing to 20 to 30 knots
by late morning, then backing northeast by mid afternoon. snow
showers likely in the morning, then a chance of snow showers in
the afternoon. waves subsiding to 3 to 6 feet occasionally to
8 feet. 
.thursday night...northeast winds 20 to 30 knots. a chance of
snow showers. waves subsiding to 1 to 3 feet. 
.friday...northeast winds 20 to 30 knots. a chance of snow. waves
building to 2 to 4 feet. 
.friday night...north winds 15 to 25 knots backing northwest
after midnight. a chance of snow showers. waves subsiding to 1 to
3 feet. 
.saturday...northwest winds 10 to 20 knots. waves subsiding to
calm to 2 feet. 
.sunday...northwest winds 10 to 20 knots veering north. waves
calm to 2 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 180901
glfls 
expires:202602182100;;832011

open lake forecast for lake superior
national weather service marquette mi
400 am est wed feb 18 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

29.7 inch troughing will persist over lake superior through thursday 
as a 29.3 inch low over minnesota this morning moves east to upper 
michigan and weakens to 29.6 inches through thursday morning. 
pressure will then steadily fall to around 29.4 inches over the lake 
thursday night through friday as a second 29.3 inch low over 
missouri thursday afternoon tracks to northern lake michigan at 29.2 
inches by friday afternoon. pressure then increases to around 30.1 
inches over lake superior through the weekend as the low dissipates 
over the lower great lakes.



lsz263-182100-
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 wed feb 18 2026

...gale warning in effect through late tonight...

.early this morning...east gales to 45 knots with a few storm
force gusts to 55 knots possible. snow, possibly mixed with
sleet. waves 11 to 15 feet occasionally to 19 feet building to
12 to 17 feet occasionally to 21 feet. 
.today...east gales to 45 knots with a few storm force gusts to
50 knots possible diminishing to gales to 45 knots. snow. waves
building to 15 to 20 feet occasionally to 25 feet. 
.tonight...east gales to 45 knots. snow likely. waves subsiding
to 10 to 14 feet occasionally to 18 feet. 
.thursday...east gales to 35 knots diminishing to 20 to 30 knots.
a chance of snow showers. waves subsiding to 5 to 8 feet
occasionally to 10 feet. 
.thursday night...east winds 20 to 30 knots becoming northeast
gales to 35 knots after midnight. a chance of snow showers. waves
subsiding to 4 to 8 feet occasionally to 10 feet. 
.friday...northeast winds 20 to 30 knots. a chance of snow. waves
building to 6 to 9 feet occasionally to 11 feet, then subsiding
to 4 to 7 feet occasionally to 9 feet. 
.friday night...north winds 15 to 25 knots. a chance of snow
showers. waves subsiding to 3 to 5 feet occasionally to 7 feet. 
.saturday...northwest winds 10 to 20 knots. waves subsiding to
1 to 3 feet, then building to 3 to 5 feet occasionally to 7 feet.
.sunday...northwest winds 10 to 20 knots veering north. waves
building to 3 to 6 feet occasionally to 8 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 180901
glfls 
expires:202602182100;;832012

open lake forecast for lake superior
national weather service marquette mi
400 am est wed feb 18 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

29.7 inch troughing will persist over lake superior through thursday 
as a 29.3 inch low over minnesota this morning moves east to upper 
michigan and weakens to 29.6 inches through thursday morning. 
pressure will then steadily fall to around 29.4 inches over the lake 
thursday night through friday as a second 29.3 inch low over 
missouri thursday afternoon tracks to northern lake michigan at 29.2 
inches by friday afternoon. pressure then increases to around 30.1 
inches over lake superior through the weekend as the low dissipates 
over the lower great lakes.



lsz264-182100-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
400 am est wed feb 18 2026

...gale warning in effect through thursday morning...

.early this morning...east gales to 45 knots. freezing spray. a
chance of snow. waves 11 to 15 feet occasionally to 19 feet
building to 12 to 17 feet occasionally to 21 feet. 
.today...east gales to 45 knots with a few storm force gusts to
55 knots possible diminishing to gales to 45 knots by mid
afternoon. freezing spray. snow. waves building to 15 to 20 feet
occasionally to 25 feet. 
.tonight...east gales to 40 knots. snow showers likely. waves
subsiding to 10 to 14 feet occasionally to 18 feet. 
.thursday...east gales to 35 knots diminishing to 20 to 30 knots
by mid afternoon. snow showers likely in the morning, then a
chance of snow showers in the afternoon. waves subsiding to 8 to
11 feet occasionally to 14 feet. 
.thursday night...east winds 20 to 30 knots increasing to gales
to 35 knots after midnight. a chance of snow showers. waves
subsiding to 7 to 10 feet occasionally to 13 feet. 
.friday...east gales to 35 knots backing northeast in the
afternoon. a chance of snow. waves subsiding to 4 to 7 feet
occasionally to 9 feet. 
.friday night...northeast winds 15 to 25 knots backing north
after midnight. a chance of snow showers. freezing spray after
midnight. waves subsiding to 3 to 5 feet occasionally to 7 feet. 
.saturday...north winds 10 to 20 knots increasing to 15 to
25 knots. freezing spray. waves subsiding to 2 to 4 feet, then
building to 4 to 7 feet occasionally to 9 feet. 
.sunday...north winds 15 to 25 knots. heavy freezing spray. waves
building to 5 to 9 feet occasionally to 11 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 180901
glfls 
expires:202602182100;;832013

open lake forecast for lake superior
national weather service marquette mi
400 am est wed feb 18 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

29.7 inch troughing will persist over lake superior through thursday 
as a 29.3 inch low over minnesota this morning moves east to upper 
michigan and weakens to 29.6 inches through thursday morning. 
pressure will then steadily fall to around 29.4 inches over the lake 
thursday night through friday as a second 29.3 inch low over 
missouri thursday afternoon tracks to northern lake michigan at 29.2 
inches by friday afternoon. pressure then increases to around 30.1 
inches over lake superior through the weekend as the low dissipates 
over the lower great lakes.



lsz265-182100-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
400 am est wed feb 18 2026

...gale warning in effect through thursday morning...

.early this morning...east gales to 45 knots. snow. waves 10 to
14 feet occasionally to 18 feet building to 11 to 15 feet
occasionally to 19 feet. 
.today...east gales to 45 knots with a few storm force gusts to
55 knots possible diminishing to gales to 45 knots by mid
afternoon. snow. a slight chance of freezing rain in the
afternoon. waves building to 15 to 20 feet occasionally to
25 feet. 
.tonight...east gales to 40 knots. snow showers likely, possibly
mixed with freezing rain in the evening, then a chance of snow
showers after midnight. waves subsiding to 7 to 10 feet
occasionally to 13 feet. 
.thursday...east gales to 35 knots veering southeast by late
morning, then becoming east 20 to 30 knots by mid afternoon. a
chance of snow showers. a slight chance of rain showers in the
afternoon. waves subsiding to 4 to 7 feet occasionally to 9 feet.
.thursday night...east winds 20 to 30 knots increasing to gales
to 35 knots after midnight. a slight chance of rain showers in
the evening. a chance of snow showers, possibly mixed with
freezing rain. waves building to 5 to 8 feet occasionally to
10 feet. 
.friday...east gales to 35 knots backing northeast in the
afternoon. snow likely in the morning, then a chance of snow in
the afternoon. waves building to 6 to 9 feet occasionally to
11 feet, then subsiding to 4 to 7 feet occasionally to 9 feet. 
.friday night...northeast winds 20 to 30 knots backing northwest
after midnight. a chance of snow showers. waves subsiding to 3 to
5 feet occasionally to 7 feet. 
.saturday...northwest winds 20 to 30 knots. a chance of snow
showers. waves subsiding to 2 to 4 feet, then building to 4 to
7 feet occasionally to 9 feet. 
.sunday...northwest winds 20 to 30 knots. waves building to 7 to
10 feet occasionally to 13 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 180901
glfls 
expires:202602182100;;832014

open lake forecast for lake superior
national weather service marquette mi
400 am est wed feb 18 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

29.7 inch troughing will persist over lake superior through thursday 
as a 29.3 inch low over minnesota this morning moves east to upper 
michigan and weakens to 29.6 inches through thursday morning. 
pressure will then steadily fall to around 29.4 inches over the lake 
thursday night through friday as a second 29.3 inch low over 
missouri thursday afternoon tracks to northern lake michigan at 29.2 
inches by friday afternoon. pressure then increases to around 30.1 
inches over lake superior through the weekend as the low dissipates 
over the lower great lakes.



lsz266-182100-
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 wed feb 18 2026

...gale warning in effect through thursday morning...

.early this morning...east gales to 45 knots. a chance of snow.
waves 10 to 14 feet occasionally to 18 feet building to 11 to
15 feet occasionally to 19 feet. 
.today...east gales to 45 knots with a few storm force gusts to
55 knots possible diminishing to gales to 45 knots by mid
afternoon. freezing spray. a slight chance of sleet in the
morning. snow. a slight chance of freezing rain in the afternoon.
waves building to 15 to 20 feet occasionally to 25 feet. 
.tonight...east gales to 40 knots. snow showers likely in the
evening, then a chance of snow showers after midnight. waves
subsiding to 9 to 12 feet occasionally to 15 feet. 
.thursday...east gales to 40 knots. snow showers likely in the
morning, then a slight chance of rain and snow showers in the
afternoon. waves subsiding to 6 to 9 feet occasionally to
11 feet. 
.thursday night...east gales to 40 knots. a slight chance of rain
showers in the evening. a chance of snow. waves 6 to 9 feet
occasionally to 11 feet. 
.friday...east gales to 40 knots. a chance of snow. waves
subsiding to 4 to 7 feet occasionally to 9 feet. 
.friday night...east winds 20 to 30 knots backing northeast after
midnight. a chance of snow showers. waves subsiding to 3 to
5 feet occasionally to 7 feet. 
.saturday...northwest winds 20 to 30 knots. freezing spray. waves
building to 5 to 8 feet occasionally to 10 feet. 
.sunday...north winds 20 to 30 knots. heavy freezing spray. waves
building to 7 to 11 feet occasionally to 14 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 180901
glfls 
expires:202602182100;;832015

open lake forecast for lake superior
national weather service marquette mi
400 am est wed feb 18 2026

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...

29.7 inch troughing will persist over lake superior through thursday 
as a 29.3 inch low over minnesota this morning moves east to upper 
michigan and weakens to 29.6 inches through thursday morning. 
pressure will then steadily fall to around 29.4 inches over the lake 
thursday night through friday as a second 29.3 inch low over 
missouri thursday afternoon tracks to northern lake michigan at 29.2 
inches by friday afternoon. pressure then increases to around 30.1 
inches over lake superior through the weekend as the low dissipates 
over the lower great lakes.



lsz267-182100-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
400 am est wed feb 18 2026

...gale warning in effect through late tonight...

.early this morning...east gales to 40 knots. a slight chance of
snow. waves 5 to 8 feet occasionally to 10 feet. 
.today...east gales to 45 knots. freezing spray. a chance of
snow, possibly mixed with sleet in the morning. snow in the
afternoon. waves building to 7 to 11 feet occasionally to
14 feet. 
.tonight...east gales to 35 knots. freezing spray in the evening.
snow showers likely in the evening, then a chance of snow showers
after midnight. waves subsiding to 4 to 7 feet occasionally to
9 feet. 
.thursday...east gales to 35 knots becoming southeast 20 to
30 knots. a chance of snow showers, possibly mixed with freezing
rain in the morning. waves building to 5 to 8 feet occasionally
to 10 feet, then subsiding to 3 to 6 feet occasionally to 8 feet.
.thursday night...east gales to 35 knots. a slight chance of rain
in the evening. a chance of snow. a chance of freezing rain after
midnight. waves 3 to 6 feet occasionally to 8 feet. 
.friday...east gales to 35 knots. snow likely in the morning,
then a chance of snow in the afternoon. waves subsiding to 3 to
5 feet occasionally to 7 feet. 
.friday night...east winds 15 to 25 knots. a chance of snow
showers. waves subsiding to 1 to 3 feet. 
.saturday...north winds 15 to 25 knots diminishing to 10 to
20 knots. waves building to 3 to 6 feet occasionally to 8 feet. 
.sunday...north winds 15 to 25 knots. heavy freezing spray. waves
subsiding to 3 to 5 feet occasionally to 7 feet, then building to
5 to 8 feet occasionally to 10 feet. 

note, wave height forecasts are for ice free areas.

$$