fzus63 kdtx 120759
glflh 
expires:202507121600;;304516

open lake forecast for lake huron
national weather service detroit/pontiac mi
359 am edt sat jul 12 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...renewed chances for showers and thunderstorms today ahead of and 
along a cold front, which brings chances for strong to severe 
thunderstorm development capable of producing wind gusts aoa 35 
knots. winds veer toward the southwest then continue toward the west 
after the passage of the front. mainly dry conditions and light 
winds expected in the wake of the front, and through early next
week.


lhz361-362-121600-
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-
359 am edt sat jul 12 2025

.today...southeast winds 5 to 10 knots becoming south 10 to
15 knots in the afternoon. a chance of showers and thunderstorms.
waves 1 to 3 feet building to 2 to 4 feet late in the afternoon. 
.tonight...south winds 10 to 15 knots becoming southwest 5 to
10 knots after midnight. a chance of showers and thunderstorms in
the evening. waves 2 to 4 feet subsiding to 1 to 3 feet in the
late evening and overnight. 
.sunday...west winds 5 to 10 knots backing to the south early in
the afternoon. waves 1 to 3 feet. 
.sunday night...light and variable winds becoming southwest 5 to
10 knots in the late evening and overnight. waves 2 feet or less.
.monday...southwest winds 5 to 10 knots veering to the northwest
late in the evening. waves 2 feet or less. 
.tuesday...light and variable winds becoming southeast 5 to
10 knots until early evening...then veering to the south in the
late evening and early morning. a chance of showers in the late
evening and early morning. waves 2 feet or less. 
.wednesday...southwest winds 5 to 10 knots veering to the
northeast until early morning. a chance of showers. waves 1 to
3 feet. 


$$

fzus63 kdtx 120759
glflh 
expires:202507121600;;304517

open lake forecast for lake huron
national weather service detroit/pontiac mi
359 am edt sat jul 12 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...renewed chances for showers and thunderstorms today ahead of and 
along a cold front, which brings chances for strong to severe 
thunderstorm development capable of producing wind gusts aoa 35 
knots. winds veer toward the southwest then continue toward the west 
after the passage of the front. mainly dry conditions and light 
winds expected in the wake of the front, and through early next
week.


lhz363-462>464-121600-
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-
359 am edt sat jul 12 2025

.today...south winds 5 to 10 knots increasing to 10 to 15 knots
in the late morning and afternoon. a chance of showers and
thunderstorms in the afternoon. waves 1 to 3 feet. 
.tonight...south winds 10 to 15 knots becoming southwest 5 to
10 knots early in the morning. a chance of showers and
thunderstorms in the evening. waves 1 to 3 feet. 
.sunday...southwest winds 5 to 10 knots. waves 1 to 3 feet. 
.sunday night...light and variable winds becoming southwest 5 to
10 knots in the late evening and overnight. waves 2 feet or less.
.monday...southwest winds 5 to 10 knots. waves 2 feet or less. 
.tuesday...light and variable winds becoming east 5 to 10 knots
until early evening...then veering to the south in the late
evening and early morning. waves 2 feet or less. 
.wednesday...south winds 5 to 10 knots backing to the southeast
early in the evening...then becoming northeast 10 to 15 knots in
the late evening and early morning. a chance of showers. waves
1 to 3 feet. 


$$

fzus63 kmkx 120800
glflm 
expires:202507121515;;304596

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
300 am cdt sat jul 12 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 broad area of low pressure around 29.8 inches continues to
gradually lift northeastward across wi and lake michigan this
morning. it looks to eventually merge with a deeper low pressure
around 29.6 inches tracking across ontario through the morning.
expecting to see increasing southerly winds along with scattered
thunderstorm activity across lake michigan this morning/afternoon.
then a cold front extending off the low pressure tracking across 
ontario will push across lake michigan later this afternoon and 
evening resulting in more westerly winds tonight. then high 
pressure around 30.0 inches will move across the southern tip of 
lake michigan on sunday, with winds turning southerly and 
southwesterly as the high moves east. southerly flow is then 
expected into at least monday, before a front becomes stationary 
over the central portion of the lake through midweek.


lmz261-362-364-366-563-565-567-868-121515-
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-
300 am cdt sat jul 12 2025

sheboygan wi to pentwater mi north...

.today...southeast winds 10 to 20 kt becoming southwest. chance
of showers and slight chance of thunderstorms this morning, then
chance of showers and thunderstorms this afternoon. waves 2 to
4 ft. 
.tonight...southwest winds 10 to 20 kt becoming west 10 to 15 kt.
slight chance of showers and thunderstorms in the evening. waves
1 to 3 ft. 
.sunday...west winds 10 to 15 kt becoming southwest 10 to 20 kt.
waves 1 to 3 ft. 
.sunday night...southwest winds 10 to 20 kt. waves 1 to 3 ft. 
.monday...southwest winds 10 to 20 kt. waves 1 to 3 ft. 
.monday night...southwest winds 10 to 20 kt becoming south 5 to
10 kt. waves 1 to 2 ft. 
.tuesday...south winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 3 ft. 
.wednesday...northwest winds 10 to 20 kt becoming north. chance
of showers. waves 2 to 4 ft.  

$$

fzus63 kmkx 120800
glflm 
expires:202507121515;;304597

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
300 am cdt sat jul 12 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 broad area of low pressure around 29.8 inches continues to
gradually lift northeastward across wi and lake michigan this
morning. it looks to eventually merge with a deeper low pressure
around 29.6 inches tracking across ontario through the morning.
expecting to see increasing southerly winds along with scattered
thunderstorm activity across lake michigan this morning/afternoon.
then a cold front extending off the low pressure tracking across 
ontario will push across lake michigan later this afternoon and 
evening resulting in more westerly winds tonight. then high 
pressure around 30.0 inches will move across the southern tip of 
lake michigan on sunday, with winds turning southerly and 
southwesterly as the high moves east. southerly flow is then 
expected into at least monday, before a front becomes stationary 
over the central portion of the lake through midweek.


lmz080-669-671-673-675-777-779-870-872-874-876-878-121515-
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-
300 am cdt sat jul 12 2025

sheboygan wi to pentwater mi south...

.today...southwest winds 10 to 20 kt. chance of showers and
slight chance of thunderstorms. waves 2 to 4 ft. 
.tonight...southwest winds 10 to 15 kt becoming northwest. slight
chance of showers and thunderstorms in the evening. waves 1 to
3 ft. 
.sunday...west winds 10 to 15 kt backing to southwest. waves 1 to
3 ft. 
.sunday night...south winds 10 to 15 kt becoming southwest. waves
1 to 2 ft. 
.monday...southwest winds 10 to 15 kt becoming south 10 to 20 kt.
waves 1 to 2 ft. 
.monday night...south winds 10 to 15 kt becoming southwest 5 to
10 kt. waves 1 to 2 ft. 
.tuesday...south winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 3 ft. 
.wednesday...southwest winds 10 to 20 kt veering to northwest.
chance of showers. waves 2 to 4 ft.  

$$

fzus63 kmqt 120802
glfls 
expires:202507122000;;304825

open lake forecast for lake superior
national weather service marquette mi
402 am edt sat jul 12 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 29.8 inch trough moves across the lake through this afternoon as a 
low over northern ontario deepens to 29.6 inches. this low deepens 
further to 29.4 inches tonight as it drifts northeast towards hudson 
bay while 30.0 inch high pressure builds just south of the great 
lakes basin. the high maintains strength and position on sunday 
while the low deepens to 29.2 inches over hudson bay. on monday, 
weak ridging near 30.0 inches builds over lake superior as 29.7 inch 
low pressure forms over the high plains. this low will pass a 29.9 
inch trough over lake superior tuesday before 30.1 inch high 
pressure builds in its wake over northern ontario wednesday into 
thursday.



lsz162-122000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
402 am edt sat jul 12 2025 /302 am cdt sat jul 12 2025/

.early this morning...southwest winds 5 to 15 knots. haze. a
chance of showers and thunderstorms. waves calm to 2 feet. 
.today...southwest winds 5 to 15 knots becoming west 10 to
20 knots late. haze. areas of smoke by mid afternoon. a chance of
showers and thunderstorms. waves calm to 2 feet. 
.tonight...west winds 10 to 20 knots backing southwest late.
haze. waves building to 1 to 3 feet. 
.sunday...southwest winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. waves building to 2 to 4 feet. 
.sunday night...southwest winds 15 to 25 knots becoming west
10 to 20 knots after midnight. a slight chance of showers and
thunderstorms through midnight. waves subsiding to calm to
2 feet. 
.monday...west winds 10 to 20 knots backing southwest by mid
afternoon. waves calm to 2 feet. 
.monday night...east winds 5 to 15 knots increasing to 10 to
20 knots after midnight. a chance of showers and thunderstorms.
waves calm to 2 feet. 
.tuesday...northeast winds 10 to 20 knots. showers likely and a
chance of thunderstorms. waves calm to 2 feet. 
.wednesday...northeast winds 10 to 20 knots. a chance of showers.
waves calm to 2 feet. 

$$

fzus63 kmqt 120802
glfls 
expires:202507122000;;304826

open lake forecast for lake superior
national weather service marquette mi
402 am edt sat jul 12 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 29.8 inch trough moves across the lake through this afternoon as a 
low over northern ontario deepens to 29.6 inches. this low deepens 
further to 29.4 inches tonight as it drifts northeast towards hudson 
bay while 30.0 inch high pressure builds just south of the great 
lakes basin. the high maintains strength and position on sunday 
while the low deepens to 29.2 inches over hudson bay. on monday, 
weak ridging near 30.0 inches builds over lake superior as 29.7 inch 
low pressure forms over the high plains. this low will pass a 29.9 
inch trough over lake superior tuesday before 30.1 inch high 
pressure builds in its wake over northern ontario wednesday into 
thursday.



lsz263-122000-
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-
402 am edt sat jul 12 2025

.early this morning...northeast winds less than 10 knots. a
chance of showers and thunderstorms. waves calm to 2 feet. 
.today...west winds 5 to 15 knots backing southwest late. a
chance of showers and thunderstorms. haze and areas of smoke by
mid afternoon. waves calm to 2 feet. 
.tonight...west winds 5 to 15 knots increasing to 10 to 20 knots
late. a slight chance of showers and thunderstorms through
midnight. haze. waves building to 2 to 4 feet. 
.sunday...southwest winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. waves 2 to 4 feet. 
.sunday night...southwest winds 10 to 20 knots veering west after
midnight. a slight chance of showers and thunderstorms through
midnight. waves subsiding to 1 to 3 feet. 
.monday...west winds 5 to 15 knots backing southwest by mid
afternoon. waves subsiding to calm to 2 feet. 
.monday night...southeast winds 5 to 15 knots. a chance of
showers. waves calm to 2 feet. 
.tuesday...northeast winds 5 to 15 knots. showers likely. a
chance of thunderstorms. a chance of showers. waves calm to
2 feet. 
.wednesday...northeast winds 5 to 15 knots. a chance of showers.
waves calm to 2 feet. 

$$

fzus63 kmqt 120802
glfls 
expires:202507122000;;304827

open lake forecast for lake superior
national weather service marquette mi
402 am edt sat jul 12 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 29.8 inch trough moves across the lake through this afternoon as a 
low over northern ontario deepens to 29.6 inches. this low deepens 
further to 29.4 inches tonight as it drifts northeast towards hudson 
bay while 30.0 inch high pressure builds just south of the great 
lakes basin. the high maintains strength and position on sunday 
while the low deepens to 29.2 inches over hudson bay. on monday, 
weak ridging near 30.0 inches builds over lake superior as 29.7 inch 
low pressure forms over the high plains. this low will pass a 29.9 
inch trough over lake superior tuesday before 30.1 inch high 
pressure builds in its wake over northern ontario wednesday into 
thursday.



lsz264-122000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
402 am edt sat jul 12 2025

.early this morning...south winds 5 to 15 knots. a chance of
showers and a slight chance of thunderstorms. waves calm to
2 feet. 
.today...south winds 5 to 15 knots veering west in the afternoon,
then backing southwest late. a chance of showers and
thunderstorms. haze and areas of smoke by mid afternoon. waves
calm to 2 feet. 
.tonight...west winds 5 to 15 knots increasing to 10 to 20 knots
after midnight. a slight chance of showers and thunderstorms
through midnight. areas of smoke through midnight. haze. waves
building to 2 to 4 feet. 
.sunday...west winds 10 to 20 knots backing southwest in the
afternoon. waves 2 to 4 feet. 
.sunday night...southwest winds 10 to 20 knots veering west after
midnight. a slight chance of showers and thunderstorms through
midnight. waves subsiding to 1 to 3 feet. 
.monday...west winds 5 to 15 knots backing southwest by mid
afternoon. waves subsiding to calm to 2 feet. 
.monday night...south winds 5 to 15 knots backing southeast after
midnight. a chance of showers after midnight. waves calm to
2 feet. 
.tuesday...southeast winds 5 to 15 knots backing northeast.
showers likely. a chance of thunderstorms. a chance of showers.
waves calm to 2 feet. 
.wednesday...northeast winds 5 to 15 knots backing north. a
chance of showers. waves calm to 2 feet. 

$$

fzus63 kmqt 120802
glfls 
expires:202507122000;;304828

open lake forecast for lake superior
national weather service marquette mi
402 am edt sat jul 12 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 29.8 inch trough moves across the lake through this afternoon as a 
low over northern ontario deepens to 29.6 inches. this low deepens 
further to 29.4 inches tonight as it drifts northeast towards hudson 
bay while 30.0 inch high pressure builds just south of the great 
lakes basin. the high maintains strength and position on sunday 
while the low deepens to 29.2 inches over hudson bay. on monday, 
weak ridging near 30.0 inches builds over lake superior as 29.7 inch 
low pressure forms over the high plains. this low will pass a 29.9 
inch trough over lake superior tuesday before 30.1 inch high 
pressure builds in its wake over northern ontario wednesday into 
thursday.



lsz265-122000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
402 am edt sat jul 12 2025

.early this morning...south winds 5 to 15 knots. a chance of
showers and a slight chance of thunderstorms. waves calm to
2 feet. 
.today...south winds 5 to 15 knots veering west late. a chance of
showers. a chance of thunderstorms by mid afternoon. haze by mid
afternoon. waves calm to 2 feet. 
.tonight...west winds 5 to 15 knots increasing to 10 to 20 knots
after midnight. a slight chance of showers and thunderstorms
through midnight. haze. waves building to 1 to 3 feet, then
subsiding to calm to 2 feet. 
.sunday...west winds 10 to 20 knots backing southwest in the
afternoon. waves calm to 2 feet. 
.sunday night...southwest winds 10 to 20 knots becoming west
15 to 25 knots after midnight. a slight chance of showers through
midnight. waves calm to 2 feet. 
.monday...west winds 10 to 20 knots veering northwest by mid
afternoon. waves calm to 2 feet. 
.monday night...southeast winds 5 to 15 knots. waves calm to
2 feet. 
.tuesday...southeast winds 10 to 20 knots backing north. a chance
of showers. a chance of thunderstorms. showers likely. waves calm
to 2 feet. 
.wednesday...north winds 10 to 20 knots. a chance of showers.
waves calm to 2 feet. 

$$

fzus63 kmqt 120802
glfls 
expires:202507122000;;304829

open lake forecast for lake superior
national weather service marquette mi
402 am edt sat jul 12 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 29.8 inch trough moves across the lake through this afternoon as a 
low over northern ontario deepens to 29.6 inches. this low deepens 
further to 29.4 inches tonight as it drifts northeast towards hudson 
bay while 30.0 inch high pressure builds just south of the great 
lakes basin. the high maintains strength and position on sunday 
while the low deepens to 29.2 inches over hudson bay. on monday, 
weak ridging near 30.0 inches builds over lake superior as 29.7 inch 
low pressure forms over the high plains. this low will pass a 29.9 
inch trough over lake superior tuesday before 30.1 inch high 
pressure builds in its wake over northern ontario wednesday into 
thursday.



lsz266-122000-
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-
402 am edt sat jul 12 2025

.early this morning...south winds 5 to 15 knots. a chance of
showers. waves calm to 2 feet. 
.today...south winds 5 to 15 knots veering northwest in the
afternoon, then backing west late. a chance of showers and a
slight chance of thunderstorms. waves calm to 2 feet. 
.tonight...west winds 5 to 15 knots increasing to 10 to 20 knots
after midnight. a slight chance of showers and thunderstorms
through midnight. haze. waves building to 2 to 4 feet. 
.sunday...west winds 10 to 20 knots backing southwest in the
afternoon. waves subsiding to 1 to 3 feet. 
.sunday night...south winds 10 to 20 knots veering southwest
after midnight. a slight chance of showers and thunderstorms.
waves 1 to 3 feet. 
.monday...west winds 10 to 20 knots diminishing to 5 to 15 knots
by mid afternoon. waves subsiding to calm to 2 feet. 
.monday night...southeast winds 5 to 15 knots. waves calm to
2 feet. 
.tuesday...southeast winds 10 to 20 knots backing north. a chance
of showers. showers likely. waves calm to 2 feet. 
.wednesday...north winds 10 to 20 knots. a chance of showers.
waves calm to 2 feet. 

$$

fzus63 kmqt 120802
glfls 
expires:202507122000;;304830

open lake forecast for lake superior
national weather service marquette mi
402 am edt sat jul 12 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 29.8 inch trough moves across the lake through this afternoon as a 
low over northern ontario deepens to 29.6 inches. this low deepens 
further to 29.4 inches tonight as it drifts northeast towards hudson 
bay while 30.0 inch high pressure builds just south of the great 
lakes basin. the high maintains strength and position on sunday 
while the low deepens to 29.2 inches over hudson bay. on monday, 
weak ridging near 30.0 inches builds over lake superior as 29.7 inch 
low pressure forms over the high plains. this low will pass a 29.9 
inch trough over lake superior tuesday before 30.1 inch high 
pressure builds in its wake over northern ontario wednesday into 
thursday.



lsz267-122000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
402 am edt sat jul 12 2025

.early this morning...southeast winds 5 to 15 knots. a chance of
showers. waves calm to 2 feet. 
.today...southeast winds 10 to 20 knots backing east in the
afternoon, then veering west late. showers through early
afternoon. a chance of thunderstorms. a chance of showers by mid
afternoon. waves calm to 2 feet. 
.tonight...west winds 5 to 15 knots becoming southwest 10 to
20 knots after midnight, then veering west late. a chance of
showers and a slight chance of thunderstorms through midnight.
haze. waves building to 1 to 3 feet. 
.sunday...southwest winds 10 to 20 knots. waves subsiding to calm
to 2 feet. 
.sunday night...south winds 10 to 20 knots veering southwest
after midnight. a slight chance of showers. a slight chance of
thunderstorms after midnight. waves building to 1 to 3 feet. 
.monday...west winds 10 to 20 knots. waves subsiding to calm to
2 feet. 
.monday night...northwest winds 5 to 15 knots backing southeast
after midnight. waves calm to 2 feet. 
.tuesday...southeast winds 10 to 20 knots veering southwest. a
chance of showers. a chance of thunderstorms. showers likely.
waves calm to 2 feet. 
.wednesday...north winds 10 to 20 knots veering northeast. a
chance of showers. waves calm to 2 feet. 

$$