fzus63 kdtx 220748
glflh 
expires:202505221600;;943207

open lake forecast for lake huron
national weather service detroit/pontiac mi
348 am edt thu may 22 2025

for waters beyond five nautical miles off shore on lake huron

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

.synopsis...low pressure, 29.60 inches, will continue to meander
across lake erie through the day. this will reinforce northeast
flow across lake huron and northwest across lake st. clair and
lake erie today. low pressure will gradually weaken towards the
end of the week as it arrives over lake ontario early friday
before phasing into new england by the weekend.


lhz361-221600-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
348 am edt thu may 22 2025

.today...north winds 10 to 15 knots. scattered showers in the
morning...then numerous showers in the afternoon. waves 1 to
3 feet. 
.tonight...northwest winds 10 to 15 knots. a chance of showers.
waves 1 to 3 feet. 
.friday...northwest winds 10 to 15 knots. showers likely. waves
1 to 3 feet. 
.friday night...northwest winds 10 to 15 knots. waves 1 to
3 feet. 
.saturday...northwest winds 10 to 15 knots decreasing to 5 to
10 knots late in the evening. waves 1 to 3 feet. 
.sunday...northwest winds 5 to 10 knots. waves 2 feet or less. 
.monday...northwest winds 5 to 10 knots until afternoon becoming
light and variable...then becoming north 5 to 10 knots in the
late evening and early morning. waves 2 feet or less. 


$$

fzus63 kdtx 220748
glflh 
expires:202505221600;;943208

open lake forecast for lake huron
national weather service detroit/pontiac mi
348 am edt thu may 22 2025

for waters beyond five nautical miles off shore on lake huron

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

.synopsis...low pressure, 29.60 inches, will continue to meander
across lake erie through the day. this will reinforce northeast
flow across lake huron and northwest across lake st. clair and
lake erie today. low pressure will gradually weaken towards the
end of the week as it arrives over lake ontario early friday
before phasing into new england by the weekend.


lhz362-363-221600-
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-
348 am edt thu may 22 2025

.today...north winds 15 to 20 knots decreasing to 10 to 15 knots
late in the afternoon. numerous showers. waves 5 to 7 feet. waves
occasionally around 10 feet. 
.tonight...northwest winds 10 to 15 knots. showers likely. waves
3 to 5 feet. 
.friday...northwest winds 10 to 15 knots. showers likely in the
morning...then a chance of showers in the afternoon. waves 2 to
4 feet. 
.friday night...northwest winds 10 to 15 knots. waves 1 to
3 feet. 
.saturday...northwest winds 10 to 15 knots. waves 1 to 3 feet. 
.sunday...northwest winds 10 to 15 knots decreasing to 5 to
10 knots in the late morning and early afternoon...then veering
to the northwest 5 to 10 knots early in the evening backing to
the northwest in the late evening and early morning. waves 1 to
3 feet. 
.monday...northwest winds 5 to 10 knots. waves 2 feet or less. 


$$

fzus63 kdtx 220748
glflh 
expires:202505221600;;943209

open lake forecast for lake huron
national weather service detroit/pontiac mi
348 am edt thu may 22 2025

for waters beyond five nautical miles off shore on lake huron

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

.synopsis...low pressure, 29.60 inches, will continue to meander
across lake erie through the day. this will reinforce northeast
flow across lake huron and northwest across lake st. clair and
lake erie today. low pressure will gradually weaken towards the
end of the week as it arrives over lake ontario early friday
before phasing into new england by the weekend.


lhz462>464-221600-
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-
348 am edt thu may 22 2025

.today...north winds 15 to 20 knots. numerous showers. patchy
fog. waves 4 to 6 feet. 
.tonight...northwest winds 15 to 20 knots decreasing to 10 to
15 knots after midnight. patchy fog in the evening. a chance of
showers. waves 4 to 6 feet. waves occasionally around 8 feet. 
.friday...northwest winds 10 to 15 knots. a chance of showers.
waves 2 to 4 feet. 
.friday night...northwest winds 10 to 15 knots. waves 2 to 4 feet
subsiding to 1 to 3 feet in the late evening and overnight. 
.saturday...northwest winds 10 to 15 knots decreasing to 5 to
10 knots late in the afternoon. waves 1 to 3 feet. 
.sunday...northwest winds 5 to 10 knots becoming light and
variable. waves 2 feet or less. 
.monday...north winds 5 to 10 knots. waves 2 feet or less. 


$$

fzus63 kmkx 220737
glflm 
expires:202505221515;;942632

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
237 am cdt thu may 22 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... 

a weak surface boundary is apparent across the northern half of lake 
michigan this morning, with 2 am surface observations placing the 
feature along an approximate kewaunee, wi - traverse city, mi line. 
the boundary separates northwest winds across the southern lake 
michigan from due northerly winds will further north. the boundary 
will continue to progress south this morning, bringing a slight 
northerly wind shift to all of lake michigan by this afternoon. with 
29.6 inch low pressure lingering near lake erie, said winds will 
remain breezy at times, particularly across the eastern half of 
lake michigan. winds will gradually weaken during the day on 
friday as 30.2 inch high pressure moves into the northern great 
plains. the aforementioned area of high pressure will progress 
across lake michigan on saturday, resulting in light in variable 
winds across the open waters. high pressure will linger across the
western great lakes on sunday as 29.8 inch low pressure develops 
in the southern great plains, leading to northwest winds across 
far northern lake michigan and northeast winds further south.

ongoing steady rain will push out of the southern open waters 
through daybreak. a few isolated rain showers are possible over the 
extreme northern open waters tonight, though most locations will 
remain dry. a dry forecast then prevails across the entirety of lake 
michigan through the remainder of the weekend. rain chances return 
monday into tuesday, particularly across the southern half of lake 
michigan. 


lmz261-362-364-366-563-565-567-868-221515-
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-
237 am cdt thu may 22 2025

sheboygan wi to pentwater mi north...

.today...north winds 15 to 25 kt increasing to 30 kt. waves 4 to
6 ft occasionally to 8 ft. 
.tonight...north winds to 30 kt becoming northwest 10 to 20 kt.
waves 3 to 5 ft subsiding to 2 to 4 ft. 
.friday...northwest winds 10 to 20 kt increasing to 15 to 25 kt.
waves 2 to 4 ft. 
.friday night...north winds 10 to 20 kt becoming northwest. waves
1 to 3 ft. 
.saturday...northwest winds 10 to 20 kt. waves 1 to 2 ft. 
.saturday night...northwest winds 10 to 15 kt becoming north.
waves 1 to 2 ft. 
.sunday...north winds 10 to 15 kt becoming northwest 10 to 20 kt.
waves 1 to 2 ft. 
.monday...north winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 2 ft.  

$$

fzus63 kmkx 220737
glflm 
expires:202505221515;;942633

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
237 am cdt thu may 22 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... 

a weak surface boundary is apparent across the northern half of lake 
michigan this morning, with 2 am surface observations placing the 
feature along an approximate kewaunee, wi - traverse city, mi line. 
the boundary separates northwest winds across the southern lake 
michigan from due northerly winds will further north. the boundary 
will continue to progress south this morning, bringing a slight 
northerly wind shift to all of lake michigan by this afternoon. with 
29.6 inch low pressure lingering near lake erie, said winds will 
remain breezy at times, particularly across the eastern half of 
lake michigan. winds will gradually weaken during the day on 
friday as 30.2 inch high pressure moves into the northern great 
plains. the aforementioned area of high pressure will progress 
across lake michigan on saturday, resulting in light in variable 
winds across the open waters. high pressure will linger across the
western great lakes on sunday as 29.8 inch low pressure develops 
in the southern great plains, leading to northwest winds across 
far northern lake michigan and northeast winds further south.

ongoing steady rain will push out of the southern open waters 
through daybreak. a few isolated rain showers are possible over the 
extreme northern open waters tonight, though most locations will 
remain dry. a dry forecast then prevails across the entirety of lake 
michigan through the remainder of the weekend. rain chances return 
monday into tuesday, particularly across the southern half of lake 
michigan. 


lmz080-669-671-673-675-777-779-870-872-874-876-878-221515-
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-
237 am cdt thu may 22 2025

sheboygan wi to pentwater mi south...

.today...northwest winds 15 to 25 kt becoming north to 30 kt.
slight chance of rain showers this morning. waves 4 to 6 ft
occasionally to 8 ft building to 5 to 8 ft occasionally to 10 ft.
.tonight...north winds to 30 kt becoming northwest 10 to 20 kt.
waves 5 to 8 ft occasionally to 10 ft subsiding to 3 to 5 ft. 
.friday...northwest winds 10 to 20 kt becoming north. waves 3 to
5 ft. 
.friday night...northwest winds 10 to 20 kt becoming north 5 to
10 kt overnight. waves 2 to 4 ft subsiding to 1 to 2 ft. 
.saturday...north winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 3 ft. 
.saturday night...north winds 10 to 15 kt diminishing to 5 to
10 kt. waves 1 to 2 ft. 
.sunday...northeast winds 10 to 15 kt becoming north 10 to 20 kt.
waves 1 to 3 ft. 
.monday...northeast winds 10 to 15 kt becoming north 10 to 20 kt.
waves 1 to 3 ft.  

$$

fzus63 kmqt 220744
glfls 
expires:202505221545;;942964

open lake forecast for lake superior
national weather service marquette mi
344 am edt thu may 22 2025

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

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

.synopsis...a 30.0 inch ridge over lake superior this morning
strengthens to 30.1 inches by this afternoon as a 29.6 inch low
spins over southern ontario. this low dwindles to 29.8 inches by
friday as it phases with another low moving into maine. in
response, ridging over lake superior increases to 30.3 inches by
saturday and remains near that strength through the rest of the 
weekend into tuesday next week. 


lsz162-221545-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
344 am edt thu may 22 2025 /244 am cdt thu may 22 2025/

.early this morning...northeast winds 5 to 15 knots. waves calm
to 2 feet. 
.today...north winds 5 to 15 knots veering southeast in the
afternoon, then backing east late. waves calm to 2 feet. 
.tonight...northwest winds 5 to 15 knots veering north after
midnight. waves calm to 2 feet. 
.friday...north winds 5 to 15 knots backing southwest in the
afternoon. waves calm to 2 feet. 
.friday night...east winds 5 to 15 knots backing north after
midnight. waves calm to 2 feet. 
.saturday...north winds 5 to 15 knots veering east by mid
afternoon. waves calm to 2 feet. 
.saturday night...east winds 5 to 15 knots backing northwest
after midnight. waves calm to 2 feet. 
.sunday...west winds 5 to 15 knots veering north. waves calm to
2 feet. 
.monday...northeast winds 5 to 15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 220744
glfls 
expires:202505221545;;942965

open lake forecast for lake superior
national weather service marquette mi
344 am edt thu may 22 2025

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

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

.synopsis...a 30.0 inch ridge over lake superior this morning
strengthens to 30.1 inches by this afternoon as a 29.6 inch low
spins over southern ontario. this low dwindles to 29.8 inches by
friday as it phases with another low moving into maine. in
response, ridging over lake superior increases to 30.3 inches by
saturday and remains near that strength through the rest of the 
weekend into tuesday next week. 


lsz263-221545-
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-
344 am edt thu may 22 2025

.early this morning...north winds 5 to 15 knots. waves 1 to
3 feet. 
.today...north winds 10 to 20 knots veering northeast in the
afternoon, then backing north late. waves subsiding to calm to
2 feet. 
.tonight...north winds 10 to 20 knots diminishing to 5 to
15 knots late. a slight chance of rain showers through midnight.
waves building to 1 to 3 feet. 
.friday...north winds 5 to 15 knots backing northwest late. waves
subsiding to calm to 2 feet. 
.friday night...northwest winds 5 to 15 knots veering north after
midnight. waves calm to 2 feet. 
.saturday...north winds 5 to 15 knots backing west by mid
afternoon. waves calm to 2 feet. 
.saturday night...west winds less than 10 knots. waves calm to
2 feet. 
.sunday...west winds 5 to 15 knots diminishing to less than
10 knots. waves calm to 2 feet. 
.monday...west winds 5 to 15 knots veering northeast. waves calm
to 2 feet. 

$$

fzus63 kmqt 220744
glfls 
expires:202505221545;;942966

open lake forecast for lake superior
national weather service marquette mi
344 am edt thu may 22 2025

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

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

.synopsis...a 30.0 inch ridge over lake superior this morning
strengthens to 30.1 inches by this afternoon as a 29.6 inch low
spins over southern ontario. this low dwindles to 29.8 inches by
friday as it phases with another low moving into maine. in
response, ridging over lake superior increases to 30.3 inches by
saturday and remains near that strength through the rest of the 
weekend into tuesday next week. 


lsz264-221545-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
344 am edt thu may 22 2025

.early this morning...north winds 5 to 15 knots. waves 1 to
3 feet. 
.today...north winds 10 to 20 knots. waves 1 to 3 feet. 
.tonight...north winds 10 to 20 knots. a slight chance of rain
showers. waves building to 2 to 4 feet, then subsiding to 1 to
3 feet. 
.friday...north winds 10 to 20 knots diminishing to 5 to 15 knots
in the afternoon. waves subsiding to calm to 2 feet. 
.friday night...north winds 5 to 15 knots. waves calm to 2 feet. 
.saturday...north winds 5 to 15 knots backing northwest by mid
afternoon. waves calm to 2 feet. 
.saturday night...northwest winds 5 to 15 knots diminishing to
less than 10 knots after midnight. waves calm to 2 feet. 
.sunday...west winds 5 to 15 knots diminishing to less than
10 knots. waves calm to 2 feet. 
.monday...west winds 5 to 15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 220744
glfls 
expires:202505221545;;942967

open lake forecast for lake superior
national weather service marquette mi
344 am edt thu may 22 2025

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

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

.synopsis...a 30.0 inch ridge over lake superior this morning
strengthens to 30.1 inches by this afternoon as a 29.6 inch low
spins over southern ontario. this low dwindles to 29.8 inches by
friday as it phases with another low moving into maine. in
response, ridging over lake superior increases to 30.3 inches by
saturday and remains near that strength through the rest of the 
weekend into tuesday next week. 


lsz265-221545-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
344 am edt thu may 22 2025

.early this morning...north winds 15 to 25 knots. waves 1 to
3 feet building to 2 to 4 feet. 
.today...north winds 10 to 20 knots increasing to 15 to 25 knots
in the afternoon. waves subsiding to 1 to 3 feet. 
.tonight...north winds 15 to 25 knots. a chance of rain showers
after midnight. waves building to 3 to 5 feet occasionally to
7 feet. 
.friday...north winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon. a slight chance of rain showers
through early afternoon. waves subsiding to 2 to 4 feet. 
.friday night...northwest winds 10 to 20 knots. waves subsiding
to calm to 2 feet. 
.saturday...northwest winds 10 to 20 knots. waves calm to 2 feet.
.saturday night...northwest winds 5 to 15 knots backing west
after midnight. waves calm to 2 feet. 
.sunday...northwest winds 5 to 15 knots backing west. waves calm
to 2 feet. 
.monday...northeast winds 5 to 15 knots backing west. waves calm
to 2 feet. 

$$

fzus63 kmqt 220744
glfls 
expires:202505221545;;942968

open lake forecast for lake superior
national weather service marquette mi
344 am edt thu may 22 2025

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

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

.synopsis...a 30.0 inch ridge over lake superior this morning
strengthens to 30.1 inches by this afternoon as a 29.6 inch low
spins over southern ontario. this low dwindles to 29.8 inches by
friday as it phases with another low moving into maine. in
response, ridging over lake superior increases to 30.3 inches by
saturday and remains near that strength through the rest of the 
weekend into tuesday next week. 


lsz266-221545-
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-
344 am edt thu may 22 2025

.early this morning...north winds 15 to 25 knots. waves 2 to
4 feet. 
.today...north winds 15 to 25 knots. waves building to 3 to
5 feet occasionally to 7 feet. 
.tonight...north winds 15 to 25 knots. a chance of rain showers.
waves 3 to 5 feet occasionally to 7 feet. 
.friday...north winds 20 to 30 knots diminishing to 10 to
20 knots. a slight chance of rain showers. waves building to 3 to
6 feet occasionally to 8 feet, then subsiding to 2 to 4 feet. 
.friday night...north winds 10 to 20 knots. a slight chance of
rain showers. waves subsiding to calm to 2 feet. 
.saturday...northwest winds 10 to 20 knots. waves calm to 2 feet.
.saturday night...northwest winds 5 to 15 knots increasing to
10 to 20 knots after midnight. waves calm to 2 feet. 
.sunday...northwest winds 10 to 20 knots diminishing to 5 to
15 knots. waves calm to 2 feet. 
.monday...northwest winds 5 to 15 knots veering north. waves calm
to 2 feet. 

$$

fzus63 kmqt 220744
glfls 
expires:202505221545;;942969

open lake forecast for lake superior
national weather service marquette mi
344 am edt thu may 22 2025

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

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

.synopsis...a 30.0 inch ridge over lake superior this morning
strengthens to 30.1 inches by this afternoon as a 29.6 inch low
spins over southern ontario. this low dwindles to 29.8 inches by
friday as it phases with another low moving into maine. in
response, ridging over lake superior increases to 30.3 inches by
saturday and remains near that strength through the rest of the 
weekend into tuesday next week. 


lsz267-221545-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
344 am edt thu may 22 2025

.early this morning...north winds 15 to 25 knots. waves 2 to
4 feet. 
.today...north winds 15 to 25 knots. a slight chance of rain
showers by mid afternoon. waves building to 3 to 5 feet
occasionally to 7 feet. 
.tonight...north winds 15 to 25 knots. a chance of rain showers.
waves subsiding to 2 to 4 feet. 
.friday...north winds 15 to 25 knots. a slight chance of rain
showers. waves 2 to 4 feet. 
.friday night...north winds 10 to 20 knots. a slight chance of
rain showers. waves subsiding to calm to 2 feet. 
.saturday...northwest winds 10 to 20 knots. waves calm to 2 feet.
.saturday night...northwest winds 10 to 20 knots. waves building
to 1 to 3 feet, then subsiding to calm to 2 feet. 
.sunday...northwest winds 10 to 20 knots diminishing to 5 to
15 knots. waves calm to 2 feet. 
.monday...northwest winds 5 to 15 knots veering north. waves calm
to 2 feet. 

$$