fzus63 kdtx 310801
glflh 
expires:202608311615;;653651

open lake forecast for lake huron
national weather service detroit/pontiac mi
401 am edt mon aug 31 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...a warm front develops over the great lakes tonight
into monday, bringing an unsettled period with showers and
storms. low pressure forming over the dakotas slowly tracks
across northern ontario through the midweek. its cold front is
likely to stall across the area on wednesday.


lhz361-311615-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
401 am edt mon aug 31 2026

.today...east winds 5 to 10 knots. showers and a chance of
thunderstorms in the morning...then a chance of showers and
thunderstorms in the afternoon. waves 2 feet or less. 
.tonight...east winds 5 to 10 knots in the evening becoming light
and variable. waves 2 feet or less. 
.tuesday...light and variable winds. a chance of showers in the
afternoon. waves 2 feet or less. 
.tuesday night...southeast winds 5 to 10 knots veering to the
west after midnight. a chance of showers. waves 2 feet or less. 
.wednesday...west winds 5 to 10 knots veering to the northwest
late in the evening. a chance of showers late in the morning.
waves 2 feet or less. 
.thursday...northwest winds 5 to 10 knots early in the morning
becoming light and variable. waves 2 feet or less. 
.friday...light and variable winds. waves 2 feet or less. 


$$

fzus63 kdtx 310801
glflh 
expires:202608311615;;653652

open lake forecast for lake huron
national weather service detroit/pontiac mi
401 am edt mon aug 31 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...a warm front develops over the great lakes tonight
into monday, bringing an unsettled period with showers and
storms. low pressure forming over the dakotas slowly tracks
across northern ontario through the midweek. its cold front is
likely to stall across the area on wednesday.


lhz362-363-311615-
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-
401 am edt mon aug 31 2026

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


$$

fzus63 kdtx 310801
glflh 
expires:202608311615;;653653

open lake forecast for lake huron
national weather service detroit/pontiac mi
401 am edt mon aug 31 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...a warm front develops over the great lakes tonight
into monday, bringing an unsettled period with showers and
storms. low pressure forming over the dakotas slowly tracks
across northern ontario through the midweek. its cold front is
likely to stall across the area on wednesday.


lhz462>464-311615-
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-
401 am edt mon aug 31 2026

.today...south winds 5 to 10 knots increasing to 10 to 15 knots
late in the afternoon. showers likely in the morning. a chance of
waterspouts in the morning. waves 2 feet or less. 
.tonight...south winds 5 to 10 knots veering to the southwest
after midnight. waves 2 feet or less. 
.tuesday...west winds 5 to 10 knots early in the morning becoming
light and variable...then becoming northeast 5 to 10 knots early
in the afternoon. a chance of showers in the afternoon. waves
2 feet or less. 
.tuesday night...northeast winds 5 to 10 knots veering to the
southwest in the late evening and overnight. a chance of showers.
waves 2 feet or less. 
.wednesday...southwest winds 5 to 10 knots veering to the
northeast late in the evening. a chance of waterspouts in the
morning. a chance of showers. waves 2 feet or less. 
.thursday...north winds 5 to 10 knots becoming light and
variable. waves 2 feet or less. 
.friday...north winds 5 to 10 knots. waves 2 feet or less. 


$$

fzus63 kmkx 310801
glflm 
expires:202608311545;;653525

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
301 am cdt mon aug 31 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...

south-southwest winds will become breezy once again this 
afternoon, when 25-30 knot gusts are anticipated over at least the
southern two-thirds of the waters. gales are not anticipated. 
periods of showers and storms continue through the overnight hours
tonight.

29.5 inch low pressure will shift from the canadian great plains 
into ontario tonight through tuesday, ultimately reaching the 
southern shores of the hudson bay by daybreak wednesday. the 
advancing low will pull a slow-moving cold front over lake 
michigan in the process, with north-northeast winds establishing 
in the wake of the boundary. whether the front clears entirely 
south of the waters or stalls out somewhere over the lake remains 
uncertain. with the front in the vicinity, shower and storm 
chances thus continue tonight through at least mid-week. a few 
stronger storms with gusty winds and hail are possible during this
time frame. if the front remains close to stationary through the 
first half of the week, it will ultimately clear south of lake 
michigan by thursday, bringing northeast winds for the end of the 
week.


lmz261-362-364-366-563-565-567-868-311545-
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-
301 am cdt mon aug 31 2026

sheboygan wi to pentwater mi north...

.today...south winds 15 to 25 kt increasing to 30 kt. chance of
showers and thunderstorms this morning. waves 3 to 5 ft building
to 4 to 6 ft occasionally to 8 ft. 
.tonight...south winds 15 to 25 kt becoming southwest 10 to 20 kt
late in the evening, then becoming west 10 to 15 kt after
midnight becoming northwest 5 to 10 kt late. slight chance of
showers in the evening. waves 4 to 6 ft occasionally to 8 ft
subsiding to 2 to 4 ft. 
.tuesday...west winds 5 to 10 kt backing to south late in the
morning, then becoming south 10 to 15 kt early in the afternoon
increasing to 10 to 20 kt late. waves 1 to 3 ft. 
.tuesday night...southwest winds 10 to 15 kt becoming west 5 to
10 kt. chance of showers overnight. waves 1 to 2 ft. 
.wednesday...northwest winds 10 to 15 kt becoming north. chance
of showers in the morning. waves 1 to 2 ft. 
.wednesday night...northeast winds 5 to 10 kt. waves 1 ft or
less. 
.thursday...northeast winds 5 to 10 kt increasing to 10 to 15 kt.
waves 1 ft or less. 
.friday...east winds 5 to 10 kt becoming northeast 10 to 15 kt.
waves 1 ft or less.  

$$

fzus63 kmkx 310801
glflm 
expires:202608311545;;653526

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
301 am cdt mon aug 31 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...

south-southwest winds will become breezy once again this 
afternoon, when 25-30 knot gusts are anticipated over at least the
southern two-thirds of the waters. gales are not anticipated. 
periods of showers and storms continue through the overnight hours
tonight.

29.5 inch low pressure will shift from the canadian great plains 
into ontario tonight through tuesday, ultimately reaching the 
southern shores of the hudson bay by daybreak wednesday. the 
advancing low will pull a slow-moving cold front over lake 
michigan in the process, with north-northeast winds establishing 
in the wake of the boundary. whether the front clears entirely 
south of the waters or stalls out somewhere over the lake remains 
uncertain. with the front in the vicinity, shower and storm 
chances thus continue tonight through at least mid-week. a few 
stronger storms with gusty winds and hail are possible during this
time frame. if the front remains close to stationary through the 
first half of the week, it will ultimately clear south of lake 
michigan by thursday, bringing northeast winds for the end of the 
week.


lmz080-669-671-673-675-777-779-870-872-874-876-878-311545-
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-
301 am cdt mon aug 31 2026

sheboygan wi to pentwater mi south...

.today...south winds 15 to 25 kt becoming southwest. chance of
showers and slight chance of thunderstorms this morning, then
slight chance of showers and thunderstorms this afternoon. waves
3 to 5 ft building to 4 to 6 ft occasionally to 8 ft. 
.tonight...southwest winds 15 to 25 kt diminishing to 10 to
15 kt. waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to
4 ft. 
.tuesday...southwest winds 10 to 15 kt. waves 1 to 3 ft. 
.tuesday night...southwest winds 10 to 15 kt. waves 1 to 2 ft. 
.wednesday...south winds 10 to 15 kt. waves 1 to 2 ft. 
.wednesday night...northwest winds 10 to 15 kt becoming north.
chance of showers and thunderstorms. waves 1 to 2 ft. 
.thursday...northeast winds 5 to 10 kt becoming north 10 to
15 kt. chance of showers. waves 1 to 2 ft. 
.friday...east winds 10 to 15 kt becoming northeast. waves 1 to
2 ft.  

$$

fzus63 kmqt 310801
glfls 
expires:202608312000;;653599

open lake forecast for lake superior
national weather service marquette mi
400 am edt mon aug 31 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 29.4 inch low over southern saskatchewan will weaken to 29.6 
inches as it moves to east-central manitoba late tonight. this will 
bring a weak, broad 29.9 inch trough over the upper great lakes. 
weak troughing remains over the lake until ridging of around 29.9 
inches builds over the lake on wednesday and strengthens to 30.0 
inches through friday. ridging will continue to build into the early 
weekend, reaching 30.1 inches.




lsz162-312000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 am edt mon aug 31 2026 /301 am cdt mon aug 31 2026/

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

$$

fzus63 kmqt 310801
glfls 
expires:202608312000;;653600

open lake forecast for lake superior
national weather service marquette mi
400 am edt mon aug 31 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 29.4 inch low over southern saskatchewan will weaken to 29.6 
inches as it moves to east-central manitoba late tonight. this will 
bring a weak, broad 29.9 inch trough over the upper great lakes. 
weak troughing remains over the lake until ridging of around 29.9 
inches builds over the lake on wednesday and strengthens to 30.0 
inches through friday. ridging will continue to build into the early 
weekend, reaching 30.1 inches.




lsz263-312000-
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 mon aug 31 2026

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

$$

fzus63 kmqt 310801
glfls 
expires:202608312000;;653601

open lake forecast for lake superior
national weather service marquette mi
400 am edt mon aug 31 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 29.4 inch low over southern saskatchewan will weaken to 29.6 
inches as it moves to east-central manitoba late tonight. this will 
bring a weak, broad 29.9 inch trough over the upper great lakes. 
weak troughing remains over the lake until ridging of around 29.9 
inches builds over the lake on wednesday and strengthens to 30.0 
inches through friday. ridging will continue to build into the early 
weekend, reaching 30.1 inches.




lsz264-312000-
lake superior from upper entrance to portage canal to manitou
island mi 5nm off shore to the us/canadian border-
401 am edt mon aug 31 2026

.early this morning...southeast winds 10 to 20 knots. patchy fog.
showers likely and a slight chance of thunderstorms. waves 1 to
3 feet. 
.today...southeast winds 10 to 20 knots diminishing to 5 to
15 knots late. patchy fog. a chance of showers. a slight chance
of thunderstorms by mid afternoon. waves building to 2 to 4 feet,
then subsiding to 1 to 3 feet. 
.tonight...west winds 5 to 15 knots backing southwest late.
patchy fog. waves subsiding to calm to 2 feet. 
.tuesday...southwest winds 5 to 15 knots increasing to 15 to
25 knots. patchy fog through early afternoon. waves building to
2 to 4 feet. 
.tuesday night...west winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.wednesday...northwest winds 5 to 15 knots becoming west less
than 10 knots by mid afternoon. waves calm to 2 feet. 
.wednesday night...west winds less than 10 knots veering north
after midnight. waves calm to 2 feet. 
.thursday...east winds 5 to 15 knots. waves calm to 2 feet. 
.friday...east winds 10 to 20 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 310801
glfls 
expires:202608312000;;653602

open lake forecast for lake superior
national weather service marquette mi
400 am edt mon aug 31 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 29.4 inch low over southern saskatchewan will weaken to 29.6 
inches as it moves to east-central manitoba late tonight. this will 
bring a weak, broad 29.9 inch trough over the upper great lakes. 
weak troughing remains over the lake until ridging of around 29.9 
inches builds over the lake on wednesday and strengthens to 30.0 
inches through friday. ridging will continue to build into the early 
weekend, reaching 30.1 inches.




lsz265-312000-
lake superior west of line from manitou island to marquette mi
beyond 5nm from shore-
401 am edt mon aug 31 2026

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

$$

fzus63 kmqt 310801
glfls 
expires:202608312000;;653603

open lake forecast for lake superior
national weather service marquette mi
400 am edt mon aug 31 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 29.4 inch low over southern saskatchewan will weaken to 29.6 
inches as it moves to east-central manitoba late tonight. this will 
bring a weak, broad 29.9 inch trough over the upper great lakes. 
weak troughing remains over the lake until ridging of around 29.9 
inches builds over the lake on wednesday and strengthens to 30.0 
inches through friday. ridging will continue to build into the early 
weekend, reaching 30.1 inches.




lsz266-312000-
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 mon aug 31 2026

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

$$

fzus63 kmqt 310801
glfls 
expires:202608312000;;653604

open lake forecast for lake superior
national weather service marquette mi
400 am edt mon aug 31 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 29.4 inch low over southern saskatchewan will weaken to 29.6 
inches as it moves to east-central manitoba late tonight. this will 
bring a weak, broad 29.9 inch trough over the upper great lakes. 
weak troughing remains over the lake until ridging of around 29.9 
inches builds over the lake on wednesday and strengthens to 30.0 
inches through friday. ridging will continue to build into the early 
weekend, reaching 30.1 inches.




lsz267-312000-
lake superior from grand marais mi to whitefish point mi 5nm off
shore to the us/canadian border-
401 am edt mon aug 31 2026

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

$$