fzus63 kdtx 171938
glfsc 
expires:202605180345;;726709

lake st clair forecast
national weather service detroit/pontiac mi
338 pm edt sun may 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...a frontal boundary remains stalled over southern lake
huron this afternoon, before lifting north as a warm front
overnight. a few strong to severe thunderstorms will be possible
this afternoon and evening with additional chances both monday
and tuesday afternoon. breezy southerly flow develops early week
as well.


lcz460-180345-
lake st clair-
338 pm edt sun may 17 2026

...small craft advisory in effect from monday morning through
monday evening...

.tonight...south winds 10 to 15 knots. partly cloudy becoming mostly
cloudy late this evening becoming partly cloudy. scattered showers
and thunderstorms early in the evening. waves 2 feet or less.
.monday...south winds 10 to 15 knots increasing to 20 to 25 knots.
mostly sunny. a chance of showers and thunderstorms late in the
afternoon. waves 1 to 3 feet building to 2 to 4 feet late in the
afternoon.
.monday night...southwest winds 15 to 20 knots diminishing to 10 to
15 knots after midnight. partly cloudy becoming mostly cloudy by
midnight becoming partly cloudy. a chance of showers and
thunderstorms . waves 1 to 3 feet.
.tuesday...south winds 15 to 20 knots becoming southwest 20 to 25
knots with gusts to 30 knots in the late morning and afternoon.
light showers and a chance of thunderstorms early in the afternoon.
waves 1 to 3 feet building to 2 to 4 feet in the late morning and
afternoon.
.tuesday night...west winds 15 to 20 knots veering to the northwest
after midnight. light showers in the evening. a chance of
thunderstorms. light showers likely after midnight. waves 2 to 4
feet subsiding to 1 to 3 feet in the late evening and overnight.
.wednesday...north winds 15 to 20 knots diminishing to 10 to 15
knots in the afternoon and evening. partly sunny in the morning
becoming mostly clear. waves 2 feet or less.
.thursday...northeast winds 10 to 15 knots. mostly clear. waves 2
feet or less.
.friday...east winds 10 to 15 knots. partly cloudy. waves 2 feet or
less.

$$

fzus63 kdtx 171938
glflh 
expires:202605180345;;726707

open lake forecast for lake huron
national weather service detroit/pontiac mi
338 pm edt sun may 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...a frontal boundary remains stalled over southern lake
huron this afternoon, before lifting north as a warm front
overnight. a few strong to severe thunderstorms will be possible
this afternoon and evening with additional chances both monday
and tuesday afternoon. breezy southerly flow develops early week
as well.


lhz462>464-180345-
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-
338 pm edt sun may 17 2026

.tonight...north winds 5 to 10 knots becoming east 10 to 15 knots
late in the evening...then veering to the southeast after
midnight. scattered showers and thunderstorms in the evening...
then scattered showers after midnight. waves 1 to 3 feet building
to 2 to 4 feet after midnight. 
.monday...south winds 10 to 15 knots increasing to 15 to 20 knots
in the late morning and afternoon. a chance of showers and
thunderstorms in the afternoon. waves 3 to 5 feet. 
.monday night...south winds 15 to 20 knots decreasing to 10 to
15 knots in the late evening and overnight. showers likely and a
chance of thunderstorms in the evening...then a chance of showers
and thunderstorms after midnight. waves 3 to 5 feet. 
.tuesday...south winds 15 to 20 knots. a chance of showers in the
morning...then showers and a chance of thunderstorms in the
afternoon. waves 3 to 5 feet. 
.tuesday night...southwest winds 15 to 20 knots veering to the
west by midnight...then becoming northwest 10 to 15 knots after
midnight. a chance of showers and thunderstorms in the evening.
waves 4 to 6 feet. waves occasionally around 8 feet. 
.wednesday...northwest winds 10 to 15 knots. waves 3 to 5 feet. 
.thursday...northeast winds 5 to 10 knots. waves 2 to 4 feet
subsiding to 1 to 3 feet. 
.friday...east winds 5 to 10 knots backing to the northeast by
midnight. waves 2 feet or less. 


$$

fzus63 kmkx 171959
glflm 
expires:202605180315;;727136

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
259 pm cdt sun may 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...

gusty northeast winds continue across north of the warm front
across much of the lake. expect to see the front gradually return
north as a warm front overnight tonight, with winds veering 
southerly and becoming gusty as low pressure around 29.5 inches 
approaches from the west. breezy south winds will then continue 
through monday and into tuesday followed by a wind shift to the 
northwest late tuesday afternoon and evening with the passage of a
cold front. high pressure and light and variable winds will then 
take hold from late wednesday into thursday.


lmz261-362-364-366-563-565-567-868-180315-
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 pm cdt sun may 17 2026

sheboygan wi to pentwater mi north...

.tonight...east winds to 30 kt veering to south. patchy fog. rain
showers with a chance of thunderstorms this evening, then chance
of rain showers and slight chance of thunderstorms overnight.
waves 3 to 5 ft building to 5 to 8 ft occasionally to 10 ft. 
.monday...south winds to 30 kt. patchy fog. chance of showers and
slight chance of thunderstorms. waves 6 to 9 ft occasionally to
12 ft. 
.monday night...south winds to 30 kt. areas of dense fog in the
evening. chance of showers in the evening, then showers with a
chance of thunderstorms overnight. waves 5 to 8 ft occasionally
to 10 ft subsiding to 4 to 7 ft occasionally to 9 ft. 
.tuesday...south gales to 35 kt becoming southwest. showers in
the morning. waves 6 to 9 ft occasionally to 12 ft. 
.tuesday night...northwest winds to 30 kt diminishing to 15 to
25 kt. waves 4 to 7 ft occasionally to 9 ft subsiding to 3 to
5 ft. 
.wednesday...northwest winds 15 to 25 kt becoming north. waves
2 to 4 ft. 
.wednesday night...northeast winds 10 to 20 kt diminishing to
5 to 10 kt. waves 1 to 3 ft subsiding to 1 to 2 ft. 
.thursday...east winds 5 to 10 kt becoming northeast 10 to 20 kt.
waves 1 ft or less. 
.friday...southeast winds 10 to 15 kt becoming northeast 10 to
20 kt. waves 1 to 3 ft.  

$$

fzus63 kmkx 171959
glflm 
expires:202605180315;;727137

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
259 pm cdt sun may 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...

gusty northeast winds continue across north of the warm front
across much of the lake. expect to see the front gradually return
north as a warm front overnight tonight, with winds veering 
southerly and becoming gusty as low pressure around 29.5 inches 
approaches from the west. breezy south winds will then continue 
through monday and into tuesday followed by a wind shift to the 
northwest late tuesday afternoon and evening with the passage of a
cold front. high pressure and light and variable winds will then 
take hold from late wednesday into thursday.


lmz080-669-671-673-675-777-779-870-872-874-876-878-180315-
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 pm cdt sun may 17 2026

sheboygan wi to pentwater mi south...

.tonight...southeast winds 15 to 25 kt becoming south to 30 kt.
patchy fog this evening. slight chance of rain showers overnight.
waves 3 to 5 ft building to 5 to 8 ft occasionally to 10 ft. 
.monday...south winds to 30 kt. chance of showers and
thunderstorms. patchy fog in the afternoon. waves 5 to 8 ft
occasionally to 10 ft. 
.monday night...south winds 15 to 25 kt increasing to 30 kt.
chance of showers and thunderstorms. waves 4 to 7 ft occasionally
to 9 ft. 
.tuesday...south winds to 30 kt becoming southwest. chance of
showers. waves 6 to 9 ft occasionally to 12 ft. 
.tuesday night...west winds 15 to 25 kt becoming northwest 10 to
20 kt. waves 4 to 7 ft occasionally to 9 ft subsiding to 4 to
6 ft occasionally to 8 ft. 
.wednesday...north winds 10 to 20 kt. waves 3 to 5 ft. 
.wednesday night...northeast winds 10 to 20 kt diminishing to
10 to 15 kt. waves 3 to 5 ft. 
.thursday...east winds 10 to 15 kt becoming northeast 10 to
20 kt. waves 1 to 3 ft. 
.friday...east winds 10 to 15 kt becoming northeast. waves 1 to
3 ft.  

$$