fzus63 kdtx 180154
glflh 
expires:202604181000;;553705

open lake forecast for lake huron
national weather service detroit/pontiac mi
954 pm edt fri apr 17 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...some areas of fog this evening into early tonight
mainly over the northern half of lake huron. low pressure, 29.30
inches, lifting into northern ontario drags a respectable cold
front through the central great lakes saturday supporting another
round of showers and storms. colder air filters into the region
the rest of the weekend maintaining moderate to strong
northwesterly winds.


lhz361>363-181000-
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-
lake huron from sturgeon point to alabaster mi beyond 5nm off
shore-
954 pm edt fri apr 17 2026

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


$$

fzus63 kdtx 180154
glflh 
expires:202604181000;;553706

open lake forecast for lake huron
national weather service detroit/pontiac mi
954 pm edt fri apr 17 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...some areas of fog this evening into early tonight
mainly over the northern half of lake huron. low pressure, 29.30
inches, lifting into northern ontario drags a respectable cold
front through the central great lakes saturday supporting another
round of showers and storms. colder air filters into the region
the rest of the weekend maintaining moderate to strong
northwesterly winds.


lhz462>464-181000-
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-
954 pm edt fri apr 17 2026

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


$$

fzus63 kmkx 180254
glflm 
expires:202604180900;;555858

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
953 pm cdt fri apr 17 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 will become gusty and southeasterly through tonight, and 
strong to severe storms will cross the lake through late evening as
a cold front sweeps through the area. winds are expected to 
remain just below gale force. dense fog will continue over the 
lake until the cold front clears late tonight. 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 tracks southeast over the upper great 
lakes.


lmz080-669-671-673-675-777-779-870-872-874-876-878-180900-
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-
953 pm cdt fri apr 17 2026

sheboygan wi to pentwater mi south...

...dense fog advisory in effect until 4 am cdt saturday...

.rest of tonight...south winds to 30 kt veering to west. patchy
dense fog late this evening, then areas of dense fog overnight.
rain showers with a chance of thunderstorms. waves 4 to 7 ft
occasionally to 9 ft subsiding to 3 to 5 ft. 
.saturday...northwest winds to 30 kt becoming west 15 to 25 kt.
slight chance of rain showers in the morning. waves 4 to 6 ft
occasionally to 8 ft. 
.saturday night...west winds 15 to 25 kt diminishing to 10 to
20 kt. waves 4 to 6 ft occasionally to 8 ft. 
.sunday...west winds 10 to 20 kt becoming northwest. waves 3 to
5 ft. 
.sunday night...north winds 10 to 15 kt becoming northeast. waves
2 to 4 ft. 
.monday...east winds 5 to 10 kt becoming southeast 10 to 20 kt in
the afternoon. waves 1 to 2 ft building to 2 to 4 ft. 
.monday night...southeast winds 15 to 25 kt becoming south to
30 kt. waves 4 to 6 ft occasionally to 8 ft building to 5 to 8 ft
occasionally to 10 ft. 
.tuesday...south winds to 30 kt diminishing to 10 to 20 kt. waves
5 to 8 ft occasionally to 10 ft subsiding to 4 to 7 ft
occasionally to 9 ft. 
.wednesday...northeast winds 10 to 15 kt. waves 2 to 4 ft
subsiding to 1 to 3 ft.  

$$

fzus63 kmkx 180254
glflm 
expires:202604180900;;555857

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
953 pm cdt fri apr 17 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 will become gusty and southeasterly through tonight, and 
strong to severe storms will cross the lake through late evening as
a cold front sweeps through the area. winds are expected to 
remain just below gale force. dense fog will continue over the 
lake until the cold front clears late tonight. 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 tracks southeast over the upper great 
lakes.


lmz261-362-364-366-563-565-567-868-180900-
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-
953 pm cdt fri apr 17 2026

sheboygan wi to pentwater mi north...

...dense fog advisory in effect until 4 am cdt saturday...

.rest of tonight...south winds to 30 kt becoming west late. 
patchy dense fog. rain showers with a chance of thunderstorms. 
waves 4 to 7 ft occasionally to 9 ft subsiding to 4 to 6 ft 
occasionally to 8 ft.
.saturday...northwest winds to 30 kt becoming west 15 to 25 kt.
chance of rain showers in the morning, then chance of snow
showers and slight chance of rain showers in the afternoon. waves
4 to 6 ft occasionally to 8 ft. 
.saturday night...west winds 15 to 25 kt. waves 3 to 5 ft. 
.sunday...northwest winds 15 to 25 kt. waves 3 to 5 ft. 
.sunday night...north winds 15 to 25 kt diminishing to 10 to
20 kt. waves 2 to 4 ft. 
.monday...west winds 10 to 15 kt becoming south 10 to 20 kt.
waves 1 to 2 ft building to 2 to 4 ft. 
.monday night...south winds to 30 kt. waves 6 to 9 ft
occasionally to 12 ft. 
.tuesday...southwest winds to 30 kt diminishing to 10 to 20 kt.
waves 6 to 9 ft occasionally to 12 ft. 
.wednesday...east winds 10 to 15 kt becoming northeast. waves
1 to 3 ft.  

$$

fzus63 kmqt 180201
glfls 
expires:202604180800;;553958

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt fri apr 17 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...


a low of around 29.4 inches will move from just north of lake 
superior to the hudson bay overnight. behind it, ridging builds over 
the lake, strengthening to about 30.3 inches sunday night into 
monday morning. this ridging quickly gives way to 29.8 inch 
troughing monday night into tuesday morning as a weakening low 
swings from the hudson bay shoreline of far northern ontario into 
james bay. high pressure ridging builds back to 30.2 inches over 
lake superior by tuesday night. the high will shift east on 
wednesday as a 29.2 inch low pressure develops over the high plains.



lsz264-180800-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
1000 pm edt fri apr 17 2026

...gale warning in effect until 11 pm edt this evening...
...gale warning in effect from 4 am edt saturday through saturday
evening...

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

$$

fzus63 kmqt 180201
glfls 
expires:202604180800;;553959

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt fri apr 17 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...


a low of around 29.4 inches will move from just north of lake 
superior to the hudson bay overnight. behind it, ridging builds over 
the lake, strengthening to about 30.3 inches sunday night into 
monday morning. this ridging quickly gives way to 29.8 inch 
troughing monday night into tuesday morning as a weakening low 
swings from the hudson bay shoreline of far northern ontario into 
james bay. high pressure ridging builds back to 30.2 inches over 
lake superior by tuesday night. the high will shift east on 
wednesday as a 29.2 inch low pressure develops over the high plains.



lsz265-180800-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
1000 pm edt fri apr 17 2026

...gale warning in effect until 11 pm edt this evening...
...gale warning in effect from 4 am edt saturday through saturday
evening...

.rest of tonight...south winds 20 to 30 knots becoming west gales
to 35 knots after midnight. a slight chance of thunderstorms by
midnight. a chance of rain showers. waves 3 to 5 feet
occasionally to 7 feet building to 4 to 7 feet occasionally to
9 feet. 
.saturday...west gales to 40 knots. a slight chance of snow
showers. waves building to 5 to 9 feet occasionally to 11 feet. 
.saturday night...west gales to 40 knots becoming northwest gales
to 35 knots after midnight. a slight chance of snow showers
through midnight. waves building to 6 to 9 feet occasionally to
11 feet, then subsiding to 4 to 7 feet occasionally to 9 feet. 
.sunday...northwest winds 20 to 30 knots diminishing to 15 to
25 knots by mid afternoon. waves subsiding to 3 to 5 feet
occasionally to 7 feet. 
.sunday night...northwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. waves subsiding to calm to 2 feet.
.monday...southwest winds 10 to 20 knots becoming southeast 15 to
25 knots by mid afternoon. waves building to 2 to 4 feet. 
.monday night...south gales to 35 knots veering southwest after
midnight. waves building to 4 to 7 feet occasionally to 9 feet,
then subsiding to 3 to 5 feet occasionally to 7 feet. 
.tuesday...northwest winds 15 to 25 knots becoming north 5 to
15 knots. waves subsiding to calm to 2 feet. 
.wednesday...southeast winds 10 to 20 knots increasing to 15 to
25 knots. waves building to 3 to 5 feet occasionally to 7 feet. 

$$

fzus63 kmqt 180201
glfls 
expires:202604180800;;553960

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt fri apr 17 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...


a low of around 29.4 inches will move from just north of lake 
superior to the hudson bay overnight. behind it, ridging builds over 
the lake, strengthening to about 30.3 inches sunday night into 
monday morning. this ridging quickly gives way to 29.8 inch 
troughing monday night into tuesday morning as a weakening low 
swings from the hudson bay shoreline of far northern ontario into 
james bay. high pressure ridging builds back to 30.2 inches over 
lake superior by tuesday night. the high will shift east on 
wednesday as a 29.2 inch low pressure develops over the high plains.



lsz266-180800-
lake superior east of a line from manitou island to marquette mi
and west of a line from grand marais mi to the us/canadian border
beyond 5nm from shore-
1000 pm edt fri apr 17 2026

...gale warning in effect until midnight edt tonight...
...gale warning in effect from 4 am edt saturday through saturday
evening...

.rest of tonight...south gales to 35 knots becoming west 20 to
30 knots after midnight, then becoming northwest gales to
35 knots late. a chance of showers and thunderstorms by midnight,
then rain showers likely, possibly mixed with snow showers and
sleet after midnight. waves 4 to 8 feet occasionally to 10 feet,
then building to 6 to 9 feet occasionally to 11 feet. 
.saturday...northwest gales to 35 knots backing west in the
afternoon. a chance of rain showers through early afternoon. a
slight chance of snow showers. waves building to 10 to 14 feet
occasionally to 18 feet. 
.saturday night...west gales to 35 knots veering northwest after
midnight. a slight chance of snow showers. waves subsiding to
8 to 11 feet occasionally to 14 feet. 
.sunday...northwest winds 20 to 30 knots. a slight chance of snow
showers through early afternoon. waves subsiding to 6 to 9 feet
occasionally to 11 feet. 
.sunday night...northwest winds 15 to 25 knots becoming north
5 to 15 knots after midnight. waves subsiding to 1 to 3 feet. 
.monday...southwest winds 5 to 15 knots becoming south 20 to
30 knots by mid afternoon. waves subsiding to calm to 2 feet,
then building to 3 to 5 feet occasionally to 7 feet. 
.monday night...south gales to 40 knots veering southwest after
midnight. waves building to 7 to 10 feet occasionally to 13 feet.
.tuesday...northwest winds 20 to 30 knots becoming north 10 to
20 knots. waves subsiding to calm to 2 feet. 
.wednesday...southeast winds 10 to 20 knots increasing to 15 to
25 knots. waves building to 3 to 6 feet occasionally to 8 feet. 

$$

fzus63 kmqt 180201
glfls 
expires:202604180800;;553961

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt fri apr 17 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...


a low of around 29.4 inches will move from just north of lake 
superior to the hudson bay overnight. behind it, ridging builds over 
the lake, strengthening to about 30.3 inches sunday night into 
monday morning. this ridging quickly gives way to 29.8 inch 
troughing monday night into tuesday morning as a weakening low 
swings from the hudson bay shoreline of far northern ontario into 
james bay. high pressure ridging builds back to 30.2 inches over 
lake superior by tuesday night. the high will shift east on 
wednesday as a 29.2 inch low pressure develops over the high plains.



lsz267-180800-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
1000 pm edt fri apr 17 2026

...gale warning in effect from 4 am edt saturday through saturday
evening...

.rest of tonight...southeast gales to 35 knots veering south
after midnight, then becoming west 20 to 30 knots late. a chance
of rain showers by midnight. a chance of thunderstorms. rain
showers, possibly mixed with sleet after midnight. waves 3 to
6 feet occasionally to 8 feet, then building to 5 to 8 feet
occasionally to 10 feet. 
.saturday...northwest winds 20 to 30 knots becoming west gales to
40 knots in the afternoon. a chance of rain showers, possibly
mixed with sleet through early afternoon. a slight chance of snow
showers. waves building to 10 to 14 feet occasionally to 18 feet.
.saturday night...west gales to 35 knots veering northwest after
midnight. a chance of snow showers. waves subsiding to 9 to
12 feet occasionally to 15 feet. 
.sunday...northwest gales to 35 knots. a slight chance of snow
showers through early afternoon. waves subsiding to 7 to 10 feet
occasionally to 13 feet. 
.sunday night...northwest winds 20 to 30 knots becoming north
5 to 15 knots after midnight. waves subsiding to 2 to 4 feet. 
.monday...west winds 5 to 15 knots becoming south 15 to 25 knots
by mid afternoon. waves subsiding to calm to 2 feet, then
building to 2 to 4 feet. 
.monday night...south gales to 35 knots veering southwest after
midnight. waves building to 6 to 10 feet occasionally to 13 feet.
.tuesday...west winds 20 to 30 knots becoming northwest 5 to
15 knots. waves subsiding to calm to 2 feet. 
.wednesday...east winds 5 to 15 knots becoming southeast 10 to
20 knots. waves building to 2 to 4 feet. 

$$

fzus63 kmqt 180201
glfls 
expires:202604180800;;553956

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt fri apr 17 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...


a low of around 29.4 inches will move from just north of lake 
superior to the hudson bay overnight. behind it, ridging builds over 
the lake, strengthening to about 30.3 inches sunday night into 
monday morning. this ridging quickly gives way to 29.8 inch 
troughing monday night into tuesday morning as a weakening low 
swings from the hudson bay shoreline of far northern ontario into 
james bay. high pressure ridging builds back to 30.2 inches over 
lake superior by tuesday night. the high will shift east on 
wednesday as a 29.2 inch low pressure develops over the high plains.



lsz162-180800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 pm edt fri apr 17 2026 /900 pm cdt fri apr 17 2026/

.rest of tonight...west winds 20 to 30 knots. waves 3 to 6 feet
occasionally to 8 feet. 
.saturday...west winds 20 to 30 knots increasing to 30 knots with
a few gale force gusts to 35 knots possible in the afternoon,
then diminishing to 20 to 30 knots late. a slight chance of snow
showers. waves building to 4 to 7 feet occasionally to 9 feet. 
.saturday night...west winds 20 to 30 knots becoming northwest
15 to 25 knots after midnight. a slight chance of snow showers
through midnight. waves subsiding to 1 to 3 feet. 
.sunday...northwest winds 10 to 20 knots. waves subsiding to calm
to 2 feet. 
.sunday night...northwest winds 5 to 15 knots veering north after
midnight. waves calm to 2 feet. 
.monday...south winds 10 to 20 knots increasing to 15 to 25 knots
by mid afternoon. waves building to 2 to 4 feet. 
.monday night...southwest winds 15 to 25 knots veering west after
midnight. 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 northeast 5 to
15 knots. waves subsiding to calm to 2 feet. 
.wednesday...east winds 5 to 15 knots increasing to 10 to
20 knots. waves building to 2 to 4 feet. 

$$

fzus63 kmqt 180201
glfls 
expires:202604180800;;553957

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt fri apr 17 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...


a low of around 29.4 inches will move from just north of lake 
superior to the hudson bay overnight. behind it, ridging builds over 
the lake, strengthening to about 30.3 inches sunday night into 
monday morning. this ridging quickly gives way to 29.8 inch 
troughing monday night into tuesday morning as a weakening low 
swings from the hudson bay shoreline of far northern ontario into 
james bay. high pressure ridging builds back to 30.2 inches over 
lake superior by tuesday night. the high will shift east on 
wednesday as a 29.2 inch low pressure develops over the high plains.



lsz263-180800-
lake superior from saxon harbor wi to upper entrance to portage
canal mi 5nm off shore to the us/canadian border including isle
royale national park-
1000 pm edt fri apr 17 2026

...gale warning in effect from 4 am edt saturday through saturday
evening...

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

$$