fzus63 kdtx 040752
glflh 
expires:202608041600;;596092

open lake forecast for lake huron
national weather service detroit/pontiac mi
352 am edt tue aug 4 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...high pressure influence lingers across the central
great lakes today as the center of the surface ridge slides
across appalachia into the northeast. meanwhile, a low pressure
system will move into hudson bay from northern ontario as its
attendant cold front tracks into the region from the west. it
briefly stalls out over lake huron wednesday providing the first
opportunity for showers and a few thunderstorms for the latter
half of the week.


lhz361-041600-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
352 am edt tue aug 4 2026

.today...south winds 5 to 10 knots backing to the southeast late
in the afternoon. waves 2 feet or less building to 2 to 4 feet
late in the afternoon. 
.tonight...light and variable winds. a chance of showers after
midnight. waves 3 to 5 feet subsiding to 1 to 3 feet early in the
morning. 
.wednesday...light and variable winds. a chance of showers. waves
2 feet or less. 
.wednesday night...light and variable winds. waves 2 feet or
less. 
.thursday...light and variable winds becoming south 5 to 10 knots
late in the evening. waves 2 feet or less. 
.friday...southwest winds 5 to 10 knots backing to the east early
in the evening...then veering to the south by midnight. waves
2 feet or less. 
.saturday...southwest winds 5 to 10 knots becoming light and
variable. a chance of showers by midnight. waves 2 feet or less. 


$$

fzus63 kdtx 040752
glflh 
expires:202608041600;;596093

open lake forecast for lake huron
national weather service detroit/pontiac mi
352 am edt tue aug 4 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...high pressure influence lingers across the central
great lakes today as the center of the surface ridge slides
across appalachia into the northeast. meanwhile, a low pressure
system will move into hudson bay from northern ontario as its
attendant cold front tracks into the region from the west. it
briefly stalls out over lake huron wednesday providing the first
opportunity for showers and a few thunderstorms for the latter
half of the week.


lhz362-363-041600-
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-
352 am edt tue aug 4 2026

.today...southwest winds 5 to 10 knots becoming south 10 to
15 knots early in the afternoon...then increasing to 15 to
20 knots late in the afternoon. waves 1 to 3 feet building to
4 to 6 feet late in the afternoon. waves occasionally around
8 feet. 
.tonight...south winds 15 to 20 knots becoming southwest 5 to
10 knots. waves 3 to 5 feet. 
.wednesday...south winds 5 to 10 knots. a chance of showers.
waves 1 to 3 feet. 
.wednesday night...light and variable winds. a chance of showers
in the evening...then showers likely after midnight. waves 2 feet
or less. 
.thursday...light and variable winds. a chance of showers. waves
2 feet or less. 
.friday...light and variable winds becoming south 5 to 10 knots .
waves 2 feet or less. 
.saturday...southwest winds 5 to 10 knots becoming south 10 to
15 knots early in the evening...then decreasing to 5 to 10 knots
by midnight. a chance of showers by midnight. waves 1 to 3 feet. 


$$

fzus63 kdtx 040752
glflh 
expires:202608041600;;596094

open lake forecast for lake huron
national weather service detroit/pontiac mi
352 am edt tue aug 4 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...high pressure influence lingers across the central
great lakes today as the center of the surface ridge slides
across appalachia into the northeast. meanwhile, a low pressure
system will move into hudson bay from northern ontario as its
attendant cold front tracks into the region from the west. it
briefly stalls out over lake huron wednesday providing the first
opportunity for showers and a few thunderstorms for the latter
half of the week.


lhz462>464-041600-
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-
352 am edt tue aug 4 2026

.today...south winds 5 to 10 knots becoming southeast 10 to
15 knots late in the afternoon. waves 1 to 3 feet. 
.tonight...south winds 10 to 15 knots decreasing to 5 to 10 knots
early in the morning. waves 1 to 3 feet. 
.wednesday...south winds 5 to 10 knots. waves 2 feet or less. 
.wednesday night...southeast winds 5 to 10 knots veering to the
southwest after midnight. a chance of showers. waves 2 feet or
less. 
.thursday...west winds 5 to 10 knots veering to the north late in
the morning...then becoming light and variable late in the
evening. showers likely. waves 2 feet or less. 
.friday...light and variable winds becoming southeast 5 to
10 knots by midnight. a chance of showers early in the morning. a
chance of showers and thunderstorms early in the evening. waves
2 feet or less. 
.saturday...southwest winds 5 to 10 knots. a chance of. waves
2 feet or less. 


$$

fzus63 kmkx 040759
glflm 
expires:202608041515;;596236

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
259 am cdt tue aug 4 2026

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

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

.synopsis...

high pressure around 30.0 inches over the great lakes this
morning will gradually move southeastward throughout the day as
low pressure around 29.6 inches moves into the hudson bay,
bringing southwesterly winds to the lake today. gusts of 25-30
kt are expected across the northern two-thirds, with conditions
hazardous to small craft in portions of the nearshore regions
north of port washington this afternoon through this evening.
winds will diminish and become generally light and northwesterly
tonight as a cold front from this low progresses southward
through the lake. thunderstorms are expected along and ahead of
the front. rain and storms remain possible through wednesday
night as this front stalls. high pressure of 30.0 inches will
bring a return to light winds thursday into friday, with low
pressure developing again in northern canada friday into friday
night, bringing a return to southerly winds and chances for
thunderstorms into the weekend.


lmz261-362-364-366-563-565-567-868-041515-
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-
259 am cdt tue aug 4 2026

sheboygan wi to pentwater mi north...

.today...south winds 15 to 25 kt increasing to 30 kt. waves 3 to
5 ft. 
.tonight...southwest winds 15 to 25 kt diminishing to 10 to 20 kt
late in the evening, then backing to northeast 10 to 15 kt after
midnight becoming north late. showers likely with a chance of
thunderstorms in the evening, then chance of showers and
thunderstorms overnight. waves 3 to 5 ft subsiding to 2 to 4 ft. 
.wednesday...northeast winds 5 to 10 kt increasing to 10 to
15 kt. chance of showers in the morning. waves 1 to 3 ft
subsiding to 1 to 2 ft. 
.wednesday night...southeast winds 5 to 10 kt becoming east.
chance of showers in the evening. waves 1 ft or less. 
.thursday...southeast winds 10 to 15 kt becoming southwest. waves
1 ft or less. 
.thursday night...south winds 10 to 15 kt becoming southwest
10 to 20 kt. waves 1 to 2 ft. 
.friday...southwest winds 10 to 20 kt increasing to 15 to 25 kt.
waves 2 to 4 ft. 
.saturday...southwest winds 15 to 25 kt. waves 1 to 3 ft.  

$$

fzus63 kmkx 040759
glflm 
expires:202608041515;;596237

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
259 am cdt tue aug 4 2026

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

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

.synopsis...

high pressure around 30.0 inches over the great lakes this
morning will gradually move southeastward throughout the day as
low pressure around 29.6 inches moves into the hudson bay,
bringing southwesterly winds to the lake today. gusts of 25-30
kt are expected across the northern two-thirds, with conditions
hazardous to small craft in portions of the nearshore regions
north of port washington this afternoon through this evening.
winds will diminish and become generally light and northwesterly
tonight as a cold front from this low progresses southward
through the lake. thunderstorms are expected along and ahead of
the front. rain and storms remain possible through wednesday
night as this front stalls. high pressure of 30.0 inches will
bring a return to light winds thursday into friday, with low
pressure developing again in northern canada friday into friday
night, bringing a return to southerly winds and chances for
thunderstorms into the weekend.


lmz080-669-671-673-675-777-779-870-872-874-876-878-041515-
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-
259 am cdt tue aug 4 2026

sheboygan wi to pentwater mi south...

.today...south winds 10 to 20 kt increasing to 15 to 25 kt. waves
3 to 5 ft. 
.tonight...south winds 15 to 25 kt diminishing to 10 to 20 kt
late in the evening, then becoming southwest 10 to 15 kt
overnight. chance of showers and thunderstorms in the evening,
then showers likely with a chance of thunderstorms overnight.
waves 3 to 5 ft subsiding to 2 to 4 ft. 
.wednesday...west winds 10 to 15 kt becoming southwest 5 to
10 kt. chance of showers in the morning, then chance of showers
and thunderstorms in the afternoon. waves 1 to 3 ft. 
.wednesday night...east winds 5 to 10 kt veering to west. showers
with a chance of thunderstorms in the evening, then chance of
showers overnight. waves 1 to 2 ft. 
.thursday...north winds 5 to 10 kt increasing to 10 to 15 kt.
chance of showers in the morning. waves 1 ft or less.
.thursday night...east winds 5 to 10 kt veering to southwest.
waves 1 ft or less. 
.friday...southwest winds 5 to 10 kt becoming south 10 to 20 kt.
waves 1 to 2 ft. 
.saturday...southwest winds 10 to 20 kt becoming south. waves
1 to 3 ft.  

$$

fzus63 kmqt 040801
glfls 
expires:202608042000;;596357

open lake forecast for lake superior
national weather service marquette mi
401 am edt tue aug 4 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 29.8 inch trough tracks across the lake today as a 29.4 inch low 
moves over hudson bay. 30.0 inch ridging returns on wednesday as 
high pressure builds into the great lakes from the northern plains. 
for the late week and into the weekend, lake superior will be 
between a 30.3 inch bermuda high and a 29.6 inch low pressure around 
western hudson bay.




lsz162-042000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 am edt tue aug 4 2026 /301 am cdt tue aug 4 2026/

.early this morning...southwest winds 15 to 25 knots. showers
likely and a slight chance of thunderstorms. waves 2 to 4 feet. 
.today...west winds 15 to 25 knots diminishing to 10 to 20 knots
in the afternoon, then backing southwest late. waves subsiding to
1 to 3 feet. 
.tonight...west winds 10 to 20 knots diminishing to 5 to 15 knots
after midnight. waves subsiding to calm to 2 feet. 
.wednesday...southwest winds 5 to 15 knots backing south late.
waves calm to 2 feet. 
.wednesday night...south winds 5 to 15 knots veering southwest
after midnight. waves calm to 2 feet. 
.thursday...southwest winds 10 to 20 knots backing south by mid
afternoon. waves calm to 2 feet. 
.thursday night...southwest winds 10 to 20 knots. waves calm to
2 feet. 
.friday...southwest winds 10 to 20 knots becoming west 5 to
15 knots. a chance of showers. waves building to 1 to 3 feet,
then subsiding to calm to 2 feet. 
.saturday...southwest winds 10 to 20 knots becoming west 5 to
15 knots. a chance of showers. waves calm to 2 feet. 

$$

fzus63 kmqt 040801
glfls 
expires:202608042000;;596358

open lake forecast for lake superior
national weather service marquette mi
401 am edt tue aug 4 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 29.8 inch trough tracks across the lake today as a 29.4 inch low 
moves over hudson bay. 30.0 inch ridging returns on wednesday as 
high pressure builds into the great lakes from the northern plains. 
for the late week and into the weekend, lake superior will be 
between a 30.3 inch bermuda high and a 29.6 inch low pressure around 
western hudson bay.




lsz263-042000-
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-
401 am edt tue aug 4 2026

.early this morning...southwest winds 15 to 25 knots. a chance of
showers and a slight chance of thunderstorms. waves 2 to 4 feet. 
.today...west winds 15 to 25 knots diminishing to 10 to 20 knots
in the afternoon, then backing southwest late. a chance of
showers through early afternoon. waves 2 to 4 feet. 
.tonight...west winds 10 to 20 knots diminishing to 5 to 15 knots
after midnight. waves subsiding to calm to 2 feet. 
.wednesday...west winds 5 to 15 knots becoming southwest 10 to
20 knots in the afternoon. waves building to 1 to 3 feet. 
.wednesday night...south winds 5 to 15 knots veering southwest
after midnight. waves subsiding to calm to 2 feet. 
.thursday...southwest winds 15 to 25 knots. waves building to
1 to 3 feet, then subsiding to calm to 2 feet. 
.thursday night...south winds 10 to 20 knots veering southwest
after midnight. waves building to 2 to 4 feet. 
.friday...southwest winds 15 to 25 knots diminishing to 5 to
15 knots. a chance of showers. waves subsiding to calm to 2 feet.
.saturday...southwest winds 10 to 20 knots becoming west 5 to
15 knots. a chance of showers. waves calm to 2 feet. 

$$

fzus63 kmqt 040801
glfls 
expires:202608042000;;596359

open lake forecast for lake superior
national weather service marquette mi
401 am edt tue aug 4 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 29.8 inch trough tracks across the lake today as a 29.4 inch low 
moves over hudson bay. 30.0 inch ridging returns on wednesday as 
high pressure builds into the great lakes from the northern plains. 
for the late week and into the weekend, lake superior will be 
between a 30.3 inch bermuda high and a 29.6 inch low pressure around 
western hudson bay.




lsz264-042000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
401 am edt tue aug 4 2026

.early this morning...south winds 15 to 25 knots. a slight chance
of showers and thunderstorms. waves 1 to 3 feet building to 2 to
4 feet. 
.today...southwest winds 15 to 25 knots becoming west 10 to
20 knots in the afternoon, then backing southwest late. a slight
chance of showers through early afternoon. waves subsiding to
1 to 3 feet. 
.tonight...west winds 10 to 20 knots diminishing to 5 to 15 knots
after midnight. waves subsiding to calm to 2 feet. 
.wednesday...west winds 5 to 15 knots backing southwest in the
afternoon. waves calm to 2 feet. 
.wednesday night...south winds 5 to 15 knots. waves calm to
2 feet. 
.thursday...southwest winds 10 to 20 knots backing south by mid
afternoon. waves building to 1 to 3 feet, then subsiding to calm
to 2 feet. 
.thursday night...south winds 10 to 20 knots veering southwest
after midnight. waves building to 2 to 4 feet. 
.friday...southwest winds 10 to 20 knots diminishing to 5 to
15 knots. a chance of showers. waves subsiding to calm to 2 feet.
.saturday...southwest winds 5 to 15 knots veering west. a chance
of showers. waves calm to 2 feet. 

$$

fzus63 kmqt 040801
glfls 
expires:202608042000;;596360

open lake forecast for lake superior
national weather service marquette mi
401 am edt tue aug 4 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 29.8 inch trough tracks across the lake today as a 29.4 inch low 
moves over hudson bay. 30.0 inch ridging returns on wednesday as 
high pressure builds into the great lakes from the northern plains. 
for the late week and into the weekend, lake superior will be 
between a 30.3 inch bermuda high and a 29.6 inch low pressure around 
western hudson bay.




lsz265-042000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
401 am edt tue aug 4 2026

.early this morning...south winds 15 to 25 knots. waves 1 to
3 feet. 
.today...south winds 15 to 25 knots veering west in the
afternoon, then diminishing to 10 to 20 knots late. a slight
chance of showers. waves subsiding to calm to 2 feet. 
.tonight...west winds 10 to 20 knots. waves calm to 2 feet. 
.wednesday...west winds 5 to 15 knots backing southwest in the
afternoon, then backing southeast late. waves calm to 2 feet. 
.wednesday night...south winds 10 to 20 knots. waves calm to
2 feet. 
.thursday...south winds 10 to 20 knots backing southeast by mid
afternoon. waves calm to 2 feet. 
.thursday night...south winds 15 to 25 knots veering southwest
after midnight. waves building to 1 to 3 feet. 
.friday...southwest winds 10 to 20 knots. waves subsiding to calm
to 2 feet. 
.saturday...west winds 10 to 20 knots. a chance of showers. waves
calm to 2 feet. 

$$

fzus63 kmqt 040801
glfls 
expires:202608042000;;596361

open lake forecast for lake superior
national weather service marquette mi
401 am edt tue aug 4 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 29.8 inch trough tracks across the lake today as a 29.4 inch low 
moves over hudson bay. 30.0 inch ridging returns on wednesday as 
high pressure builds into the great lakes from the northern plains. 
for the late week and into the weekend, lake superior will be 
between a 30.3 inch bermuda high and a 29.6 inch low pressure around 
western hudson bay.




lsz266-042000-
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-
401 am edt tue aug 4 2026

.early this morning...south winds 15 to 25 knots. waves 2 to
4 feet. 
.today...south winds 15 to 25 knots veering west in the
afternoon, then diminishing to 10 to 20 knots late. a chance of
showers. a slight chance of thunderstorms by mid afternoon. waves
subsiding to 1 to 3 feet. 
.tonight...west winds 5 to 15 knots. waves subsiding to calm to
2 feet. 
.wednesday...west winds 5 to 15 knots backing southwest in the
afternoon, then backing east late. waves calm to 2 feet. 
.wednesday night...south winds 5 to 15 knots increasing to 10 to
20 knots after midnight. waves calm to 2 feet. 
.thursday...south winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. waves calm to 2 feet. 
.thursday night...south winds 15 to 25 knots veering southwest
after midnight. waves building to 2 to 4 feet. 
.friday...southwest winds 10 to 20 knots. a chance of showers.
waves subsiding to calm to 2 feet, then building to 1 to 3 feet. 
.saturday...west winds 5 to 15 knots. a chance of showers. waves
calm to 2 feet. 

$$

fzus63 kmqt 040801
glfls 
expires:202608042000;;596362

open lake forecast for lake superior
national weather service marquette mi
401 am edt tue aug 4 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 29.8 inch trough tracks across the lake today as a 29.4 inch low 
moves over hudson bay. 30.0 inch ridging returns on wednesday as 
high pressure builds into the great lakes from the northern plains. 
for the late week and into the weekend, lake superior will be 
between a 30.3 inch bermuda high and a 29.6 inch low pressure around 
western hudson bay.




lsz267-042000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
401 am edt tue aug 4 2026

.early this morning...south winds 15 to 25 knots. waves 2 to
4 feet. 
.today...south winds 15 to 25 knots veering southwest in the
afternoon, then becoming west 5 to 15 knots late. a chance of
showers and a slight chance of thunderstorms by mid afternoon.
waves subsiding to calm to 2 feet. 
.tonight...southwest winds 5 to 15 knots veering west late. a
slight chance of showers through midnight. waves calm to 2 feet. 
.wednesday...west winds 5 to 15 knots veering northwest in the
afternoon. waves calm to 2 feet. 
.wednesday night...south winds 5 to 15 knots. waves calm to
2 feet. 
.thursday...south winds 5 to 15 knots backing southeast by mid
afternoon. waves calm to 2 feet. 
.thursday night...south winds 10 to 20 knots increasing to 15 to
25 knots after midnight. waves building to 2 to 4 feet. 
.friday...south winds 5 to 15 knots increasing to 10 to 20 knots.
a chance of showers. waves subsiding to calm to 2 feet, then
building to 1 to 3 feet. 
.saturday...west winds 5 to 15 knots backing south. a chance of
showers and thunderstorms. waves calm to 2 feet. 

$$