fzus63 kdtx 210714
glflh 
expires:202604211515;;732877

open lake forecast for lake huron
national weather service detroit/pontiac mi
314 am edt tue apr 21 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 weak low pressure system will pass through southeast
michigan this afternoon and evening. there is a chance of showers
and storms across the south and is followed by an area of high
pressure at 30.00 inches on wednesday. a warm front slowly lifts
into the area late thursday into friday as the parent low
pressure stalls over the upper midwest.


lhz361>363-211515-
lake huron from 5nm east of mackinac bridge to presque isle lt
beyond 5 nm off shore-
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-
314 am edt tue apr 21 2026

.today...south winds 15 to 20 knots decreasing to 10 to 15 knots
in the afternoon. waves 6 to 9 feet. waves occasionally around
12 feet. 
.tonight...north winds 5 to 10 knots. waves 3 to 5 feet subsiding
to 1 to 3 feet after midnight. 
.wednesday...north winds 5 to 10 knots until late afternoon
becoming light and variable. waves 2 feet or less. 
.wednesday night...light and variable winds. waves 2 feet or
less. 
.thursday...east winds 5 to 10 knots increasing to 10 to
15 knots. waves 1 to 3 feet building to 5 to 7 feet. waves
occasionally around 10 feet. 
.friday...east winds 15 to 20 knots. showers likely . waves 5 to
7 feet. waves occasionally around 10 feet. 
.saturday...northeast winds 15 to 20 knots becoming north 10 to
15 knots. a chance of showers until afternoon. waves 3 to 5 feet.


$$

fzus63 kdtx 210714
glflh 
expires:202604211515;;732878

open lake forecast for lake huron
national weather service detroit/pontiac mi
314 am edt tue apr 21 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 weak low pressure system will pass through southeast
michigan this afternoon and evening. there is a chance of showers
and storms across the south and is followed by an area of high
pressure at 30.00 inches on wednesday. a warm front slowly lifts
into the area late thursday into friday as the parent low
pressure stalls over the upper midwest.


lhz462>464-211515-
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-
314 am edt tue apr 21 2026

.today...south winds 20 to 25 knots decreasing to 10 to 15 knots.
sprinkles. waves 5 to 7 feet. waves occasionally around 10 feet. 
.tonight...south winds 5 to 10 knots. waves 2 to 4 feet subsiding
to 1 to 3 feet in the late evening and overnight. 
.wednesday...north winds 5 to 10 knots. waves 2 feet or less. 
.wednesday night...north winds 5 to 10 knots early in the evening
becoming light and variable. waves 2 feet or less. 
.thursday...southeast winds 5 to 10 knots becoming east 10 to
15 knots late in the afternoon. waves 1 to 3 feet. 
.friday...southeast winds 10 to 15 knots. showers likely . waves
2 to 4 feet. 
.saturday...east winds 10 to 15 knots backing to the northeast in
the late morning and early afternoon...then becoming north 5 to
10 knots . showers likely early in the morning...then a chance of
showers in the late morning and early afternoon. waves 2 to
4 feet. 


$$

fzus63 kmkx 210144
glflm 
expires:202604210915;;719893

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
844 pm cdt mon apr 20 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 30.4 inches over lower michigan and low 
pressure around 29.7 inches developing in the plains will bring 
increasing southerly winds to lake michigan through tuesday 
morning. a few gales are possible tonight into early tuesday 
morning, especially over the northern third of the lake as low 
pressure around 29.5 inches also progresses across the hudson bay.

then a cold front from this low will progress southward down the 
lake tuesday afternoon and evening, with northeasterly winds
behind it. high pressure around 30.4 inches builds into ontario 
on wednesday, bringing light and variable winds across the lake. 
winds will then become southeast and increase thursday into 
friday, as strong low pressure around 29.2 inches develops in the 
northern plains.


lmz261-362-364-366-563-565-567-868-210915-
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-
844 pm cdt mon apr 20 2026

sheboygan wi to pentwater mi north...

.rest of tonight...south winds to 30 kt. waves 4 to 7 ft
occasionally to 9 ft building to 5 to 8 ft occasionally to 10 ft.
.tuesday...south winds 15 to 25 kt becoming southwest 10 to
15 kt. waves 4 to 7 ft occasionally to 9 ft subsiding to 4 to
6 ft occasionally to 8 ft. 
.tuesday night...north winds 5 to 10 kt becoming northeast. waves
2 to 4 ft subsiding to 1 to 2 ft. 
.wednesday...northeast winds 5 to 10 kt. waves 1 to 2 ft. 
.wednesday night...east winds 5 to 10 kt becoming southeast
overnight. waves 1 ft or less building to 1 to 3 ft. 
.thursday...south winds 10 to 20 kt increasing to 15 to 25 kt.
waves 2 to 4 ft building to 4 to 6 ft occasionally to 8 ft. 
.thursday night...southeast winds 15 to 25 kt increasing to
30 kt. chance of rain showers. waves 5 to 8 ft occasionally to
10 ft. 
.friday...south winds 15 to 25 kt diminishing to 10 to 20 kt.
chance of rain showers. waves 5 to 8 ft occasionally to 10 ft
subsiding to 4 to 7 ft occasionally to 9 ft. 
.saturday...north winds 10 to 20 kt. waves 3 to 5 ft.  

$$

fzus63 kmkx 210144
glflm 
expires:202604210915;;719894

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
844 pm cdt mon apr 20 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 30.4 inches over lower michigan and low 
pressure around 29.7 inches developing in the plains will bring 
increasing southerly winds to lake michigan through tuesday 
morning. a few gales are possible tonight into early tuesday 
morning, especially over the northern third of the lake as low 
pressure around 29.5 inches also progresses across the hudson bay.

then a cold front from this low will progress southward down the 
lake tuesday afternoon and evening, with northeasterly winds
behind it. high pressure around 30.4 inches builds into ontario 
on wednesday, bringing light and variable winds across the lake. 
winds will then become southeast and increase thursday into 
friday, as strong low pressure around 29.2 inches develops in the 
northern plains.


lmz080-669-671-673-675-777-779-870-872-874-876-878-210915-
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-
844 pm cdt mon apr 20 2026

sheboygan wi to pentwater mi south...

.rest of tonight...southeast winds 15 to 25 kt becoming south.
waves 4 to 6 ft occasionally to 8 ft. 
.tuesday...south winds to 30 kt diminishing to 10 to 20 kt.
chance of rain showers in the afternoon. waves 4 to 7 ft
occasionally to 9 ft subsiding to 3 to 5 ft. 
.tuesday night...north winds 10 to 15 kt diminishing to 5 to
10 kt. waves 2 to 4 ft subsiding to 1 to 2 ft. 
.wednesday...northeast winds 5 to 10 kt becoming north. waves
1 to 2 ft. 
.wednesday night...east winds 5 to 10 kt becoming south 10 to
15 kt. waves 1 ft or less building to 1 to 3 ft. 
.thursday...south winds 10 to 20 kt increasing to 15 to 25 kt.
waves 2 to 4 ft building to 4 to 6 ft occasionally to 8 ft. 
.thursday night...south winds 15 to 25 kt. chance of showers.
waves 5 to 8 ft occasionally to 10 ft. 
.friday...south winds 15 to 25 kt diminishing to 10 to 20 kt.
showers likely. waves 5 to 8 ft occasionally to 10 ft subsiding
to 4 to 7 ft occasionally to 9 ft. 
.saturday...north winds 10 to 20 kt. waves 4 to 6 ft occasionally
to 8 ft.  

$$