fzus63 kdtx 230138
glfsc 
expires:202604230945;;827275

lake st clair forecast
national weather service detroit/pontiac mi
938 pm edt wed apr 22 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...high pressure holds over the region thursday before a
warm front slowly lifts into the area late thursday into friday.
a low will develop along the front and track across the southern
great lakes friday night.


lcz460-230945-
lake st clair-
938 pm edt wed apr 22 2026

.rest of tonight...northeast winds 5 to 10 knots by midnight
becoming light and variable. clear. waves 2 feet or less.
.thursday...east winds 5 to 10 knots veering to the southeast in the
afternoon. sunny. waves 2 feet or less.
.thursday night...southeast winds 5 to 10 knots. mostly clear. waves
2 feet or less.
.friday...southeast winds 5 to 10 knots increasing to 10 to 15 knots
in the late morning and afternoon. partly sunny. a chance of light
showers early in the afternoon. waves 2 feet or less.
.friday night...southeast winds 10 to 15 knots backing to the
northeast after midnight. light showers ...then light showers likely
after midnight. waves 2 feet or less.
.saturday...north winds 5 to 10 knots increasing to 10 to 15 knots
in the afternoon and evening. mostly cloudy with light showers
likely in the morning...then partly cloudy in the afternoon and
evening. waves 2 feet or less.
.sunday...east winds 5 to 10 knots. mostly clear. waves 2 feet or
less.
.monday...southeast winds 20 to 25 knots with gusts to 30 knots.
partly cloudy. light showers likely. waves 2 to 4 feet. a small
craft advisory may be needed.

$$

fzus63 kdtx 230135
glflh 
expires:202604230945;;827161

open lake forecast for lake huron
national weather service detroit/pontiac mi
935 pm edt wed apr 22 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 holds over the region thursday before a
warm front slowly lifts into the area late thursday into friday.
a low will develop along the front and track across the southern
great lakes friday night.


lhz462>464-230945-
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-
935 pm edt wed apr 22 2026

.rest of tonight...light and variable winds. waves 2 feet or
less. 
.thursday...east winds 5 to 10 knots. waves 2 feet or less. 
.thursday night...east winds 5 to 10 knots becoming southeast
10 to 15 knots after midnight. waves 1 to 3 feet. 
.friday...southeast winds 10 to 15 knots. waves 2 to 4 feet. 
.friday night...east winds 10 to 15 knots becoming southeast
15 to 20 knots by midnight...then decreasing to 10 to 15 knots
after midnight. showers. waves 3 to 5 feet. 
.saturday...northeast winds 10 to 15 knots becoming 5 to 10 knots
late in the evening. showers in the morning...then a chance of
showers late in the morning. waves 2 to 4 feet subsiding to 1 to
3 feet. 
.sunday...north winds 5 to 10 knots veering to the northeast by
midnight. waves 2 feet or less. 
.monday...east winds 10 to 15 knots becoming southeast to
30 knots with gusts to 35 knot gales. a chance of showers . waves
1 to 3 feet building to 8 to 12 feet. waves occasionally around
15 feet. 


$$

fzus63 kmkx 221921
glflm 
expires:202604230415;;813962

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
221 pm cdt wed apr 22 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 will shift from the northern great lakes to the
lower great lakes into this evening. light northerly winds are 
expected with areas of fog over far southern lake michigan. 

winds veer southeast and accelerate late tonight through friday 
morning as 29.2 inch low pressure develops over the northern great
plains and slowly tracks eastward. some 30 kt easterly winds may 
occur over the northern tip of the lake thursday night and friday. 

the low will pull a cold front across lake michigan friday 
afternoon and evening, resulting in a breezy north-northwest wind
shift. showers and thunderstorms are expected late thursday night
through friday, both ahead of and along the front. severe weather
is not anticipated at this time.

northerly winds will continue through the weekend across lake 
michigan. 29.4 inch low pressure is forecast to track 
northeastward from the central great plains (sunday night) near or
over lake michigan (monday night), with gusty east to southeast 
winds ahead of its arrival and gusty west or northwest winds 
behind it (into tuesday). not seeing widespread gale potential 
with this system, though trends will be monitored.



lmz261-362-364-366-563-565-567-868-230415-
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-
221 pm cdt wed apr 22 2026

sheboygan wi to pentwater mi north...

.tonight...northeast winds 5 to 10 kt veering to southeast 10 to
15 kt. waves 1 to 2 ft. 
.thursday...southeast winds 10 to 20 kt increasing to 15 to
25 kt. patchy fog in the afternoon. waves 2 to 4 ft. 
.thursday night...east to southeast winds to 30 kt. waves 4 to 7 
ft occasionally to 9 ft. 
.friday...east to southeast winds to 30 kt becoming southeast. 
chance of rain showers in the morning, then rain showers in the 
afternoon. waves 4 to 7 ft occasionally to 9 ft. 
.friday night...north winds to 30 kt diminishing to 15 to 25 kt.
chance of rain showers. waves 4 to 6 ft occasionally to 8 ft
subsiding to 3 to 5 ft. 
.saturday...north winds 10 to 20 kt. waves 2 to 4 ft. 
.saturday night...northeast winds 10 to 15 kt diminishing to 5 to
10 kt. waves 1 to 3 ft. 
.sunday...northeast winds 5 to 10 kt increasing to 10 to 15 kt.
waves 1 ft or less. 
.monday...southeast winds 15 to 25 kt increasing to 30 kt. chance
of rain showers. waves 7 to 10 ft occasionally to 13 ft building
to 8 to 11 ft occasionally to 14 ft.  

$$

fzus63 kmkx 221921
glflm 
expires:202604230415;;813963

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
221 pm cdt wed apr 22 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 will shift from the northern great lakes to the
lower great lakes into this evening. light northerly winds are 
expected with areas of fog over far southern lake michigan. 

winds veer southeast and accelerate late tonight through friday 
morning as 29.2 inch low pressure develops over the northern great
plains and slowly tracks eastward. some 30 kt easterly winds may 
occur over the northern tip of the lake thursday night and friday. 

the low will pull a cold front across lake michigan friday 
afternoon and evening, resulting in a breezy north-northwest wind
shift. showers and thunderstorms are expected late thursday night
through friday, both ahead of and along the front. severe weather
is not anticipated at this time.

northerly winds will continue through the weekend across lake 
michigan. 29.4 inch low pressure is forecast to track 
northeastward from the central great plains (sunday night) near or
over lake michigan (monday night), with gusty east to southeast 
winds ahead of its arrival and gusty west or northwest winds 
behind it (into tuesday). not seeing widespread gale potential 
with this system, though trends will be monitored.



lmz080-669-671-673-675-777-779-870-872-874-876-878-230415-
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-
221 pm cdt wed apr 22 2026

sheboygan wi to pentwater mi south...

.tonight...north winds 5 to 10 kt veering to south. patchy fog.
waves 1 to 2 ft. 
.thursday...southeast winds 10 to 15 kt increasing to 10 to
20 kt. patchy fog. waves 2 to 4 ft. 
.thursday night...southeast winds 10 to 20 kt becoming south.
waves 4 to 6 ft occasionally to 8 ft. 
.friday...south winds 15 to 25 kt becoming southwest 10 to 20 kt.
rain showers likely in the morning, then rain showers in the
afternoon. waves 4 to 6 ft occasionally to 8 ft. 
.friday night...west winds 10 to 15 kt becoming northwest 10 to
20 kt. rain showers in the evening. waves 3 to 5 ft. 
.saturday...north winds 10 to 20 kt. waves 2 to 4 ft. 
.saturday night...north winds 10 to 15 kt becoming northeast 5 to
10 kt. waves 2 to 4 ft. 
.sunday...east winds 5 to 10 kt becoming northeast 10 to 15 kt.
waves 1 to 2 ft. 
.monday...southeast winds to 30 kt. rain showers likely with a
chance of thunderstorms. waves 8 to 11 ft occasionally to 14 ft. 

$$