fzus63 kdtx 171353
glfsc 
expires:202609172200;;603118

lake st clair forecast
national weather service detroit/pontiac mi
953 am edt thu sep 17 2026

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...southern edge of northern ontario high pressure, 30.30
inches, slides across the central great lakes through thursday. a
secondary cold front passes southward through the region thursday
night into early friday before plains low pressure arrives this
weekend.


lcz460-172200-
lake st clair-
953 am edt thu sep 17 2026

.rest of today...north winds 5 to 10 knots. partly sunny. waves 2
feet or less.
.tonight...northeast winds 5 to 10 knots becoming north 10 to 15
knots in the late evening and overnight. partly cloudy becoming
mostly cloudy late this evening becoming partly cloudy. waves 2 feet
or less.
.friday...north winds 10 to 15 knots becoming northeast 5 to 10
knots in the late morning and early afternoon...then increasing to
10 to 15 knots early in the afternoon. partly sunny. waves 2 feet or
less.
.friday night...northeast winds 15 to 20 knots diminishing to 10 to
15 knots in the late evening and overnight. mostly cloudy. waves 1
to 3 feet.
.saturday...east winds 10 to 15 knots. showers likely in the
morning. showers in the afternoon and evening. a chance of
thunderstorms in the evening. waves 2 feet or less.
.sunday...northeast winds 20 to 25 knots. showers. waves 1 to 3
feet.
.monday...northeast winds 20 to 25 knots with gusts to 30 knots.
partly cloudy. waves 2 to 4 feet. a small craft advisory may be
needed.

$$

fzus63 kdtx 171351
glflh 
expires:202609172200;;603114

open lake forecast for lake huron
national weather service detroit/pontiac mi
951 am edt thu sep 17 2026

for waters beyond five nautical miles off shore on lake huron

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

.synopsis...southern edge of northern ontario high pressure, 30.30
inches, slides across the central great lakes through thursday. a
secondary cold front passes southward through the region thursday
night into early friday before plains low pressure arrives this
weekend.


lhz462>464-172200-
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-
951 am edt thu sep 17 2026

.rest of today...northeast winds 5 to 10 knots becoming north
10 to 15 knots late in the afternoon. waves 2 feet or less. 
.tonight...north winds 5 to 10 knots increasing to 10 to 15 knots
after midnight. waves 1 to 3 feet. 
.friday...north winds 10 to 15 knots. waves 2 to 4 feet. 
.friday night...northeast winds 10 to 15 knots becoming east 5 to
10 knots after midnight. waves 2 to 4 feet subsiding to 1 to
3 feet in the late evening and overnight. 
.saturday...southeast winds 10 to 15 knots. showers likely in the
morning...then showers late in the morning. rain showers likely
late in the afternoon. waves 1 to 3 feet. 
.sunday...northeast winds 10 to 15 knots increasing to 15 to
20 knots. a chance of showers early in the morning. waves 2 to
4 feet building to 4 to 6 feet. waves occasionally around 8 feet.
.monday...northeast winds 15 to 20 knots decreasing to 10 to
15 knots in the late morning and early afternoon...then
increasing to 15 to 20 knots . waves 4 to 6 feet. waves
occasionally around 8 feet. 


$$

fzus63 kmkx 171416
glflm 
expires:202609172130;;604368

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
916 am cdt thu sep 17 2026

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

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

.synopsis...

30.4 inch high pressure will continue east through the day into
quebec. progression of the high will maintain east-northeast 
winds across the open waters through the afternoon. occasional 
periods of showers and thunderstorms will continue across the
lake, but no severe weather is expected.

a second area of 30.4 inch high pressure will shift from the 
canadian great plains into ontario tonight into friday morning, 
maintaining east-northeast winds across lake michigan. 29.9 inch 
low pressure will develop near the missouri river friday 
afternoon, moving over or just south of waters during the day on 
saturday. winds will veer east-southeasterly and increase as the 
low approaches. some gusts could approach gale thresholds, 
particularly friday night into saturday morning. whether 
borderline gales will be widespread enough to warrant gale 
warnings remains uncertain at this time. widespread showers and
storms will accompany the approaching/passing area of low pressure
friday night through at least saturday night, with widespread 
severe weather not expected. winds will shift northeasterly as 
the low slowly moves into the ohio river valley sunday into the 
beginning of next week.


lmz261-362-364-366-563-565-567-868-172130-
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-
916 am cdt thu sep 17 2026

sheboygan wi to pentwater mi north...

.rest of today...northeast winds 5 to 10 kt becoming north. waves
1 to 2 ft. 
.tonight...north winds 10 to 20 kt becoming northeast. waves 1 to
3 ft. 
.friday...northeast winds 10 to 20 kt becoming east 10 to 15 kt.
waves 2 to 4 ft. 
.friday night...east winds 15 to 25 kt becoming southeast to
30 kt. chance of showers. waves 3 to 5 ft building to 6 to 9 ft
occasionally to 12 ft. 
.saturday...southeast winds to 30 kt becoming east. showers in
the morning, then chance of showers in the afternoon. waves 8 to
11 ft occasionally to 14 ft. 
.saturday night...east winds 15 to 25 kt becoming northeast.
chance of showers. waves 5 to 8 ft occasionally to 10 ft
subsiding to 4 to 6 ft occasionally to 8 ft. 
.sunday...northeast winds to 30 kt. waves 5 to 8 ft occasionally
to 10 ft. 
.monday...east winds 15 to 25 kt. waves 4 to 6 ft occasionally to
8 ft.  

$$

fzus63 kmkx 171416
glflm 
expires:202609172130;;604369

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
916 am cdt thu sep 17 2026

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

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

.synopsis...

30.4 inch high pressure will continue east through the day into
quebec. progression of the high will maintain east-northeast 
winds across the open waters through the afternoon. occasional 
periods of showers and thunderstorms will continue across the
lake, but no severe weather is expected.

a second area of 30.4 inch high pressure will shift from the 
canadian great plains into ontario tonight into friday morning, 
maintaining east-northeast winds across lake michigan. 29.9 inch 
low pressure will develop near the missouri river friday 
afternoon, moving over or just south of waters during the day on 
saturday. winds will veer east-southeasterly and increase as the 
low approaches. some gusts could approach gale thresholds, 
particularly friday night into saturday morning. whether 
borderline gales will be widespread enough to warrant gale 
warnings remains uncertain at this time. widespread showers and
storms will accompany the approaching/passing area of low pressure
friday night through at least saturday night, with widespread 
severe weather not expected. winds will shift northeasterly as 
the low slowly moves into the ohio river valley sunday into the 
beginning of next week.


lmz080-669-671-673-675-777-779-870-872-874-876-878-172130-
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-
916 am cdt thu sep 17 2026

sheboygan wi to pentwater mi south...

.rest of today...northeast winds 10 to 15 kt. slight chance of
showers late this morning. waves 1 to 2 ft. 
.tonight...north winds 10 to 20 kt becoming northeast. waves 2 to
4 ft. 
.friday...east winds 10 to 20 kt. waves 3 to 5 ft. 
.friday night...east winds 15 to 25 kt becoming southeast to
30 kt. chance of showers in the evening, then showers overnight.
waves 4 to 6 ft occasionally to 8 ft building to 6 to 9 ft
occasionally to 12 ft. 
.saturday...southeast winds to 30 kt. showers. waves 8 to 12 ft
occasionally to 16 ft. 
.saturday night...east winds 15 to 25 kt becoming northeast.
showers likely with a chance of thunderstorms. waves 6 to 9 ft
occasionally to 12 ft. 
.sunday...northeast winds to 30 kt increasing to gales to 35 kt.
chance of showers. waves 7 to 10 ft occasionally to 13 ft
building to 8 to 11 ft occasionally to 14 ft. 
.monday...east winds to 30 kt becoming northeast gales to 35 kt.
chance of showers. waves 7 to 10 ft occasionally to 13 ft
building to 8 to 11 ft occasionally to 14 ft.  

$$