fzus63 kdtx 170144
glflh 
expires:202604170945;;495538

open lake forecast for lake huron
national weather service detroit/pontiac mi
944 pm edt thu apr 16 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...fog lingers into friday with high pressure, 30.00
inches, crossing the region. a powerful cold front arrives on
saturday, bringing another round of showers and storms in
addition to stronger winds for the weekend.


lhz363-462-170945-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
lake huron from port austin to harbor beach beyond 5nm off shore-
944 pm edt thu apr 16 2026

...dense fog advisory in effect from 2 am to 10 am edt friday...

.rest of tonight...north winds 5 to 10 knots by midnight becoming
light and variable. areas of dense fog this evening...then
widespread dense fog after midnight. waves 2 feet or less. 
.friday...light and variable winds becoming east 5 to 10 knots in
the afternoon. widespread dense fog in the morning. waves 2 feet
or less. 
.friday night...east winds 10 to 15 knots becoming southeast
20 to 25 knots with gusts to around 30 knots. a chance of showers
after midnight. waves 1 to 3 feet building to 4 to 6 feet in the
late evening and overnight. waves occasionally around 8 feet. 
.saturday...south winds 20 to 25 knots with gusts to around
30 knots decreasing to 15 to 20 knots with gusts to around
30 knots in the late morning and early afternoon...then veering
to the southwest early in the afternoon. showers likely in the
morning...then a chance of showers in the afternoon. waves 6 to
9 feet. waves occasionally around 12 feet. 
.saturday night...west winds 15 to 20 knots. a chance of showers
in the evening. waves 5 to 7 feet. waves occasionally around
10 feet. 
.sunday...northwest winds 15 to 20 knots increasing to 20 to
25 knots late in the evening. waves 6 to 9 feet building to 8 to
12 feet late in the afternoon. waves occasionally around 15 feet.
.monday...northwest winds 15 to 20 knots decreasing to 5 to
10 knots in the late morning and early afternoon...then veering
to the east early in the evening becoming south 15 to 20 knots by
midnight. waves 6 to 9 feet subsiding to 2 to 4 feet early in the
evening...then building to 4 to 6 feet by midnight. waves
occasionally around 12 feet. 
.tuesday...south winds 20 to 25 knots with gusts to around
30 knots becoming southwest 15 to 20 knots early in the evening...
then becoming west 10 to 15 knots by midnight. waves 6 to 9 feet
subsiding to 3 to 5 feet by midnight. waves occasionally around
12 feet. 


$$

fzus63 kdtx 170144
glflh 
expires:202604170945;;495537

open lake forecast for lake huron
national weather service detroit/pontiac mi
944 pm edt thu apr 16 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...fog lingers into friday with high pressure, 30.00
inches, crossing the region. a powerful cold front arrives on
saturday, bringing another round of showers and storms in
addition to stronger winds for the weekend.


lhz361-362-170945-
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-
944 pm edt thu apr 16 2026

...dense fog advisory in effect from 2 am to 10 am edt friday...

.rest of tonight...northwest winds 5 to 10 knots by midnight
becoming light and variable. areas of fog this evening...then
widespread dense fog after midnight. waves 2 feet or less. 
.friday...light and variable winds becoming east 5 to 10 knots
late in the morning...then increasing to 10 to 15 knots in the
afternoon. widespread dense fog in the morning. waves 2 feet or
less building to 3 to 5 feet late in the afternoon. 
.friday night...east winds 10 to 15 knots becoming southeast
20 to 25 knots with gusts to around 30 knots. showers likely
after midnight. waves 6 to 9 feet. waves occasionally around
12 feet. 
.saturday...south winds 20 to 25 knots with gusts to around
30 knots becoming west 15 to 20 knots early in the afternoon.
showers likely. waves 8 to 12 feet. waves occasionally around
15 feet. 
.saturday night...west winds 20 to 25 knots. gusts to 30 knots
after midnight. waves 6 to 9 feet. waves occasionally around
12 feet. 
.sunday...west winds 20 to 25 knots becoming northwest to
30 knots late in the afternoon...then decreasing to 20 to
25 knots late in the evening. waves 8 to 12 feet. waves
occasionally around 15 feet. 
.monday...northwest winds 15 to 20 knots becoming west 10 to
15 knots in the late morning and early afternoon...then backing
to the south early in the evening increasing to 20 to 25 knots by
midnight. waves 6 to 9 feet subsiding to 4 to 6 feet in the late
morning and early afternoon...then subsiding to 1 to 3 feet early
in the evening building to 6 to 9 feet by midnight. waves
occasionally around 12 feet. 
.tuesday...south winds 20 to 25 knots with gusts to around
30 knots becoming west 15 to 20 knots early in the evening...then
becoming northwest 10 to 15 knots by midnight. waves 8 to 12 feet
subsiding to 4 to 6 feet by midnight. waves occasionally around
15 feet. 


$$

fzus63 kdtx 161944
glflh 
expires:202604170345;;482037

open lake forecast for lake huron
national weather service detroit/pontiac mi
344 pm edt thu apr 16 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...weak area of low pressure, 29.60 inches, tracks into
the great lakes today maintaining periods of showers and
thunderstorms. a powerful cold front looks to cross the area on
saturday, with will present strong winds ahead and behind the
front.


lhz363-462>464-170345-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
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-
344 pm edt thu apr 16 2026

.tonight...north winds 5 to 10 knots  becoming light and
variable. areas of fog in the evening...then widespread fog after
midnight. waves 2 feet or less. 
.friday...light and variable winds becoming east 5 to 10 knots in
the afternoon. widespread fog in the morning. waves 2 feet or
less. 
.friday night...east winds 10 to 15 knots becoming southeast
20 to 25 knots with gusts to around 30 knots. a chance of showers
after midnight. waves 1 to 3 feet building to 4 to 6 feet in the
late evening and overnight. waves occasionally around 8 feet. 
.saturday...south winds 20 to 25 knots with gusts to around
30 knots decreasing to 15 to 20 knots with gusts to around
30 knots in the late morning and early afternoon...then veering
to the southwest early in the afternoon. showers in the morning...
then a chance of showers in the afternoon. waves 6 to 9 feet.
waves occasionally around 12 feet. 
.saturday night...west winds 15 to 20 knots. a chance of showers
in the evening. waves 5 to 7 feet. waves occasionally around
10 feet. 
.sunday...northwest winds 15 to 20 knots increasing to 20 to
25 knots late in the evening. waves 6 to 9 feet building to 8 to
12 feet late in the afternoon. waves occasionally around 15 feet.
.monday...northwest winds 15 to 20 knots decreasing to 10 to
15 knots in the late morning and early afternoon...then becoming
northeast 5 to 10 knots early in the evening becoming south 15 to
20 knots by midnight. waves 6 to 9 feet subsiding to 2 to 4 feet
early in the evening...then building to 4 to 6 feet by midnight.
waves occasionally around 12 feet. 
.tuesday...south winds 20 to 25 knots with gusts to around
30 knots becoming southwest 15 to 20 knots early in the evening...
then becoming west 10 to 15 knots by midnight. waves 6 to 9 feet
subsiding to 3 to 5 feet by midnight. waves occasionally around
12 feet. 


$$

fzus63 kmkx 170223
glflm 
expires:202604170915;;496964

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
923 pm cdt thu apr 16 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...

winds becoming light and variable tonight for a time as a weak 
surface ridge moves over the lake. dense fog will continue over 
the lake through this time. winds then come around to southerly 
tomorrow morning as a surface low of 29.5 inches approaches from 
the central plains. this surface low will quickly move from omaha 
to duluth from the morning into the afternoon. winds will become 
gusty and southeasterly friday night, and strong to severe storms 
will move east over the lake as a cold front sweeps through the 
area. winds then become northwesterly behind the cold front 
saturday morning. breezy northwesterly winds then continue 
saturday through sunday as the low then races northeast toward 
hudson bay. winds ease monday morning as high pressure move 
southeast over the upper great lakes.


lmz261-362-364-366-563-565-567-868-170915-
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-
923 pm cdt thu apr 16 2026

sheboygan wi to pentwater mi north...

...dense fog advisory in effect until 7 am cdt friday...

.rest of tonight...southeast winds 5 to 10 kt. patchy dense fog
late this evening, then widespread dense fog overnight. waves
1 to 2 ft. 
.friday...southeast winds 10 to 15 kt increasing to 30 kt.
widespread dense fog in the morning, then patchy fog in the
afternoon. waves 1 to 2 ft building to 4 to 6 ft occasionally to
8 ft. 
.friday night...southeast winds to 30 kt veering to southwest
15 to 25 kt. patchy fog. rain showers likely with a chance of
thunderstorms in the evening, then chance of rain showers and
thunderstorms overnight. waves 4 to 7 ft occasionally to 9 ft. 
.saturday...northwest winds to 30 kt becoming west 15 to 25 kt.
chance of rain showers in the morning. waves 4 to 6 ft
occasionally to 8 ft. 
.saturday night...west winds 15 to 25 kt becoming northwest to
30 kt. waves 4 to 6 ft occasionally to 8 ft. 
.sunday...northwest winds to 30 kt. waves 4 to 6 ft occasionally
to 8 ft. 
.sunday night...north winds 15 to 25 kt diminishing to 10 to
20 kt. waves 2 to 4 ft. 
.monday...southwest winds 10 to 15 kt becoming south 10 to 20 kt.
waves 1 to 3 ft building to 2 to 4 ft. 
.tuesday...southwest gales to 35 kt diminishing to 15 to 25 kt.
waves 7 to 10 ft occasionally to 13 ft.  

$$

fzus63 kmkx 170223
glflm 
expires:202604170915;;496965

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
923 pm cdt thu apr 16 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...

winds becoming light and variable tonight for a time as a weak 
surface ridge moves over the lake. dense fog will continue over 
the lake through this time. winds then come around to southerly 
tomorrow morning as a surface low of 29.5 inches approaches from 
the central plains. this surface low will quickly move from omaha 
to duluth from the morning into the afternoon. winds will become 
gusty and southeasterly friday night, and strong to severe storms 
will move east over the lake as a cold front sweeps through the 
area. winds then become northwesterly behind the cold front 
saturday morning. breezy northwesterly winds then continue 
saturday through sunday as the low then races northeast toward 
hudson bay. winds ease monday morning as high pressure move 
southeast over the upper great lakes.


lmz080-669-671-673-675-777-779-870-872-874-876-878-170915-
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-
923 pm cdt thu apr 16 2026

sheboygan wi to pentwater mi south...

...dense fog advisory in effect until 7 am cdt friday...

.rest of tonight...north winds 5 to 10 kt veering to south.
widespread dense fog. waves 1 to 2 ft. 
.friday...southeast winds 10 to 15 kt increasing to 30 kt.
widespread dense fog in the morning, then patchy fog in the
afternoon. waves 1 ft or less building to 4 to 6 ft occasionally
to 8 ft. 
.friday night...south winds to 30 kt veering to southwest 15 to
25 kt. chance of rain showers and thunderstorms in the evening,
then chance of rain showers overnight. patchy fog overnight.
waves 4 to 7 ft occasionally to 9 ft. 
.saturday...northwest winds to 30 kt becoming west 15 to 25 kt.
chance of rain showers in the morning. waves 4 to 7 ft
occasionally to 9 ft. 
.saturday night...west winds 10 to 20 kt increasing to 15 to
25 kt. waves 4 to 6 ft occasionally to 8 ft building to 4 to 7 ft
occasionally to 9 ft. 
.sunday...northwest winds 15 to 25 kt. waves 4 to 7 ft
occasionally to 9 ft. 
.sunday night...north winds 10 to 20 kt diminishing to 10 to
15 kt. waves 3 to 5 ft subsiding to 1 to 3 ft. 
.monday...southeast winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 3 ft building to 2 to 4 ft. 
.tuesday...southwest winds to 30 kt diminishing to 15 to 25 kt.
waves 7 to 10 ft occasionally to 13 ft.  

$$

fzus63 kmqt 170201
glfls 
expires:202604170800;;495859

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt thu apr 16 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...

weak ridging of around 29.8 inches persists over lake superior 
through tonight. troughing averaging 29.5 inches moves across the 
lake friday evening and saturday morning. ridging builds over lake 
superior the remainder by sunday, reaching about 30.3 inches monday 
morning. this gives way quickly to 29.6 inch troughing monday 
evening as a low swings southeast through ontario toward james bay.



lsz266-170800-
lake superior east of a line from manitou island to marquette mi
and west of a line from grand marais mi to the us/canadian border
beyond 5nm from shore-
1001 pm edt thu apr 16 2026

.rest of tonight...southeast winds 10 to 20 knots. areas of dense
fog. waves calm to 2 feet building to 3 to 5 feet occasionally to
7 feet. 
.friday...southeast winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon, then becoming south to 30 knots with a
few gale force gusts to 35 knots possible late. areas of dense
fog through early afternoon. waves building to 7 to 10 feet
occasionally to 13 feet. 
.friday night...south winds to 30 knots with a few gale force
gusts to 35 knots possible veering west late. a slight chance of
thunderstorms through midnight. rain showers. a slight chance of
sleet after midnight. waves building to 8 to 11 feet occasionally
to 14 feet, then subsiding to 5 to 8 feet occasionally to
10 feet. 
.saturday...west gales to 40 knots. a slight chance of rain
showers through early afternoon. a slight chance of freezing
rain, snow showers and sleet. waves building to 10 to 14 feet
occasionally to 18 feet. 
.saturday night...northwest gales to 40 knots. a slight chance of
snow showers. waves 10 to 14 feet occasionally to 18 feet. 
.sunday...northwest gales to 35 knots. waves subsiding to 7 to
10 feet occasionally to 13 feet. 
.sunday night...northwest winds 15 to 25 knots becoming north
10 to 20 knots after midnight. waves subsiding to 2 to 4 feet. 
.monday...south winds 15 to 25 knots increasing to gales to
40 knots. waves subsiding to calm to 2 feet, then building to
7 to 10 feet occasionally to 13 feet. 
.tuesday...west winds 20 to 30 knots becoming northwest 10 to
20 knots. waves subsiding to 2 to 4 feet, then building to 3 to
5 feet occasionally to 7 feet. 

$$

fzus63 kmqt 170201
glfls 
expires:202604170800;;495860

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt thu apr 16 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...

weak ridging of around 29.8 inches persists over lake superior 
through tonight. troughing averaging 29.5 inches moves across the 
lake friday evening and saturday morning. ridging builds over lake 
superior the remainder by sunday, reaching about 30.3 inches monday 
morning. this gives way quickly to 29.6 inch troughing monday 
evening as a low swings southeast through ontario toward james bay.



lsz267-170800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
1001 pm edt thu apr 16 2026

.rest of tonight...southeast winds 5 to 15 knots. widespread
dense fog. waves calm to 2 feet. 
.friday...southeast winds 10 to 20 knots increasing to 20 to
30 knots. areas of dense fog through early afternoon. waves
building to 4 to 7 feet occasionally to 9 feet. 
.friday night...southeast winds to 30 knots with a few gale force
gusts to 35 knots possible veering south after midnight, then
veering west late. rain showers and a slight chance of
thunderstorms. waves building to 4 to 8 feet occasionally to
10 feet. 
.saturday...west gales to 40 knots. a chance of rain showers,
possibly mixed with snow. a slight chance of sleet by mid
afternoon. waves building to 10 to 14 feet occasionally to
18 feet. 
.saturday night...west gales to 40 knots veering northwest after
midnight. a slight chance of rain showers and sleet through
midnight. a slight chance of snow showers. waves 10 to 14 feet
occasionally to 18 feet. 
.sunday...northwest gales to 40 knots. waves subsiding to 7 to
10 feet occasionally to 13 feet. 
.sunday night...northwest winds 15 to 25 knots becoming north
10 to 20 knots after midnight. waves subsiding to 2 to 4 feet. 
.monday...south winds 10 to 20 knots increasing to gales to
35 knots. waves subsiding to calm to 2 feet, then building to
6 to 9 feet occasionally to 11 feet. 
.tuesday...west winds 20 to 30 knots becoming northwest 10 to
20 knots. waves subsiding to 2 to 4 feet, then building to 3 to
5 feet occasionally to 7 feet. 

$$

fzus63 kmqt 170201
glfls 
expires:202604170800;;495855

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt thu apr 16 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...

weak ridging of around 29.8 inches persists over lake superior 
through tonight. troughing averaging 29.5 inches moves across the 
lake friday evening and saturday morning. ridging builds over lake 
superior the remainder by sunday, reaching about 30.3 inches monday 
morning. this gives way quickly to 29.6 inch troughing monday 
evening as a low swings southeast through ontario toward james bay.



lsz162-170800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 pm edt thu apr 16 2026 /901 pm cdt thu apr 16 2026/

.rest of tonight...northeast winds 10 to 20 knots. patchy fog.
waves 2 to 4 feet. 
.friday...east winds 10 to 20 knots backing northeast in the
afternoon, then backing northwest late. patchy fog through early
afternoon. rain showers likely and a chance of thunderstorms by
mid afternoon. waves subsiding to 1 to 3 feet. 
.friday night...west winds 15 to 25 knots increasing to 20 to
30 knots late. rain showers likely and a slight chance of
thunderstorms through midnight, then a slight chance of rain
showers after midnight. waves building to 3 to 5 feet
occasionally to 7 feet. 
.saturday...west gales to 35 knots diminishing to 20 to 30 knots
by mid afternoon. a slight chance of snow showers. waves building
to 4 to 7 feet occasionally to 9 feet, then subsiding to 3 to
6 feet occasionally to 8 feet. 
.saturday night...northwest winds 20 to 30 knots diminishing to
15 to 25 knots after midnight. waves subsiding to 2 to 4 feet. 
.sunday...northwest winds 10 to 20 knots becoming west 5 to
15 knots by mid afternoon. waves subsiding to calm to 2 feet. 
.sunday night...northwest winds 5 to 15 knots veering east after
midnight. waves calm to 2 feet. 
.monday...south winds 10 to 20 knots becoming southwest 15 to
25 knots. waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding 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. 

$$

fzus63 kmqt 170201
glfls 
expires:202604170800;;495856

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt thu apr 16 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...

weak ridging of around 29.8 inches persists over lake superior 
through tonight. troughing averaging 29.5 inches moves across the 
lake friday evening and saturday morning. ridging builds over lake 
superior the remainder by sunday, reaching about 30.3 inches monday 
morning. this gives way quickly to 29.6 inch troughing monday 
evening as a low swings southeast through ontario toward james bay.



lsz263-170800-
lake superior from saxon harbor wi to upper entrance to portage
canal mi 5nm off shore to the us/canadian border including isle
royale national park-
1001 pm edt thu apr 16 2026

.rest of tonight...east winds 5 to 15 knots veering southeast
late. patchy fog. waves calm to 2 feet building to 2 to 4 feet. 
.friday...east winds 10 to 20 knots veering south late. patchy
fog through early afternoon. a chance of showers and
thunderstorms by mid afternoon. waves building to 3 to 6 feet
occasionally to 8 feet. 
.friday night...west winds 20 to 30 knots. rain showers and a
chance of thunderstorms through midnight, then a slight chance of
rain showers, snow showers and sleet after midnight. waves
subsiding to 3 to 5 feet occasionally to 7 feet, then building to
4 to 7 feet occasionally to 9 feet. 
.saturday...west winds 20 to 30 knots increasing to gales to
35 knots by mid afternoon. a slight chance of snow showers. waves
building to 8 to 11 feet occasionally to 14 feet. 
.saturday night...northwest gales to 35 knots. waves subsiding to
4 to 7 feet occasionally to 9 feet. 
.sunday...northwest winds 20 to 30 knots becoming west 15 to
25 knots by mid afternoon. waves subsiding to 1 to 3 feet. 
.sunday night...northwest winds 10 to 20 knots becoming south
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.monday...south winds 10 to 20 knots becoming southwest 20 to
30 knots. waves building to 4 to 7 feet occasionally to 9 feet. 
.tuesday...west winds 15 to 25 knots becoming north 5 to
15 knots. waves subsiding to calm to 2 feet, then building to
1 to 3 feet. 

$$

fzus63 kmqt 170201
glfls 
expires:202604170800;;495857

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt thu apr 16 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...

weak ridging of around 29.8 inches persists over lake superior 
through tonight. troughing averaging 29.5 inches moves across the 
lake friday evening and saturday morning. ridging builds over lake 
superior the remainder by sunday, reaching about 30.3 inches monday 
morning. this gives way quickly to 29.6 inch troughing monday 
evening as a low swings southeast through ontario toward james bay.



lsz264-170800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
1001 pm edt thu apr 16 2026

.rest of tonight...southeast winds 5 to 15 knots increasing to
10 to 20 knots after midnight. areas of dense fog. waves calm to
2 feet building to 3 to 5 feet occasionally to 7 feet. 
.friday...southeast winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon. areas of dense fog through early
afternoon. a slight chance of showers and thunderstorms by mid
afternoon. waves building to 6 to 9 feet occasionally to 11 feet.
.friday night...south winds 20 to 30 knots becoming west 15 to
25 knots after midnight, then increasing to 20 to 30 knots late.
rain showers and a chance of thunderstorms through midnight, then
a chance of rain showers, possibly mixed with freezing rain, snow
showers and sleet after midnight. waves building to 8 to 11 feet
occasionally to 14 feet, then subsiding to 4 to 7 feet
occasionally to 9 feet. 
.saturday...west gales to 35 knots. a slight chance of snow
showers through early afternoon. waves building to 8 to 11 feet
occasionally to 14 feet. 
.saturday night...northwest gales to 35 knots. waves subsiding to
7 to 10 feet occasionally to 13 feet, then building to 8 to
11 feet occasionally to 14 feet. 
.sunday...northwest winds 20 to 30 knots diminishing to 15 to
25 knots by mid afternoon. waves subsiding to 2 to 4 feet. 
.sunday night...northwest winds 5 to 15 knots veering north after
midnight. waves subsiding to calm to 2 feet. 
.monday...south winds 15 to 25 knots increasing to 20 to
30 knots. waves building to 5 to 8 feet occasionally to 10 feet. 
.tuesday...west winds 20 to 30 knots becoming north 5 to
15 knots. waves subsiding to calm to 2 feet, then building to
1 to 3 feet. 

$$

fzus63 kmqt 170201
glfls 
expires:202604170800;;495858

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt thu apr 16 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...

weak ridging of around 29.8 inches persists over lake superior 
through tonight. troughing averaging 29.5 inches moves across the 
lake friday evening and saturday morning. ridging builds over lake 
superior the remainder by sunday, reaching about 30.3 inches monday 
morning. this gives way quickly to 29.6 inch troughing monday 
evening as a low swings southeast through ontario toward james bay.



lsz265-170800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
1001 pm edt thu apr 16 2026

.rest of tonight...southeast winds 10 to 20 knots increasing to
15 to 25 knots late. areas of dense fog. waves calm to 2 feet
building to 2 to 4 feet. 
.friday...southeast winds 20 to 30 knots becoming south to
30 knots with a few gale force gusts to 35 knots possible late. a
slight chance of rain showers by mid afternoon. waves building to
6 to 9 feet occasionally to 11 feet. 
.friday night...south winds to 30 knots with a few gale force
gusts to 35 knots possible becoming west 20 to 30 knots after
midnight, then increasing to 30 knots with a few gale force gusts
to 35 knots possible late. rain showers and a chance of
thunderstorms through midnight, then a chance of rain showers,
possibly mixed with snow and sleet after midnight. waves building
to 7 to 10 feet occasionally to 13 feet, then subsiding to 3 to
6 feet occasionally to 8 feet. 
.saturday...west gales to 40 knots. a slight chance of rain
showers through early afternoon. a slight chance of snow showers
and sleet. waves building to 7 to 10 feet occasionally to
13 feet. 
.saturday night...northwest gales to 40 knots. a slight chance of
snow showers through midnight. waves subsiding to 6 to 9 feet
occasionally to 11 feet. 
.sunday...northwest gales to 35 knots diminishing to 20 to
30 knots by mid afternoon. waves subsiding to 3 to 5 feet
occasionally to 7 feet. 
.sunday night...northwest winds 10 to 20 knots. waves subsiding
to calm to 2 feet. 
.monday...southeast winds 10 to 20 knots becoming south gales to
35 knots. waves building to 4 to 7 feet occasionally to 9 feet,
then subsiding to 3 to 6 feet occasionally to 8 feet. 
.tuesday...northwest winds 20 to 30 knots diminishing to 10 to
20 knots. waves subsiding to calm to 2 feet, then building to
2 to 4 feet. 

$$