fzus61 kcle 210803
glfle 
expires:202604211430;;734833

open lake forecast for lake erie
national weather service cleveland oh
403 am edt tue apr 21 2026

for waters beyond five nautical miles of shore on lake erie

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 will cross the lake today and then be pushed back
south tonight into wednesday. high pressure 30.10 inches will
build from the north on wednesday night and remain in the region
through thursday. low pressure 29.50 inches will enter the
northwest great lakes on friday and slowly move southeast,
weakening to 29.70 inches over lake erie on saturday.


lez162>164-211430-
detroit river lt. to maumee bay oh to reno beach oh beyond 5nm
offshoreline to us-canadian border-
reno beach to the islands oh beyond 5nm off shoreline to us-
canadian border-
the islands to vermilion oh beyond 5 nm off shoreline to us-
canadian border-
403 am edt tue apr 21 2026

.today...south winds 15 to 20 knots becoming southwest. waves
1 to 3 feet building to 2 to 4 feet, then subsiding to 1 to
3 feet. 
.tonight...southwest winds 10 to 15 knots becoming west. showers
likely with a chance of thunderstorms in the evening, then a
chance of showers with a slight chance of thunderstorms after
midnight. waves 1 to 2 feet. 
.wednesday...north winds 10 knots or less becoming east. waves
1 foot or less. 
.wednesday night...east winds 10 knots or less becoming
southeast. waves 1 foot or less. 
.thursday...southeast winds 5 to 10 knots. waves 1 foot or less. 
.friday...southeast winds 10 to 15 knots becoming north. a chance
of showers during the day, then showers likely friday night.
waves 2 feet or less. 
.saturday...north winds 10 to 15 knots becoming northeast. a
chance of showers during the day. waves 2 feet or less. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 210725
glfsc 
expires:202604211530;;733162

lake st clair forecast
national weather service detroit/pontiac mi
325 am edt tue apr 21 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 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.


lcz460-211530-
lake st clair-
325 am edt tue apr 21 2026

.today...south winds 15 to 20 knots. partly sunny. a chance of
sprinkles in the morning. waves 1 to 3 feet.
.tonight...southwest winds 10 to 15 knots becoming west 5 to 10
knots by midnight...then veering to the north early in the morning.
partly cloudy. waves 2 feet or less.
.wednesday...north winds 5 to 10 knots until late afternoon becoming
light and variable. mostly sunny. waves 2 feet or less.
.wednesday night...northeast winds 5 to 10 knots becoming light and
variable. mostly clear. waves 2 feet or less.
.thursday...southeast winds 5 to 10 knots. mostly clear. waves 2
feet or less.
.friday...southeast winds 10 to 15 knots. partly cloudy. light
showers likely. waves 2 feet or less.
.saturday...northeast winds 10 to 15 knots. mostly cloudy. light
showers likely. waves 2 feet or less.

$$

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 210804
glflm 
expires:202604211530;;734621

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
304 am cdt tue apr 21 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 the mid atlantic and
northeastern conus and low pressure around 29.7 inches developing
in the plains will bring breezy southerly winds to lake michigan 
through this morning. meanwhile, 29.5 inch low pressure tracks 
eastward across the hudson bay with a cold front extending south 
of it. 

the aforementioned cold front will progress southward down the 
lake this afternoon and evening, with light 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.


lmz261-362-364-366-563-565-567-868-211530-
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-
304 am cdt tue apr 21 2026

sheboygan wi to pentwater mi north...

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

$$

fzus63 kmkx 210804
glflm 
expires:202604211530;;734622

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
304 am cdt tue apr 21 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 the mid atlantic and
northeastern conus and low pressure around 29.7 inches developing
in the plains will bring breezy southerly winds to lake michigan 
through this morning. meanwhile, 29.5 inch low pressure tracks 
eastward across the hudson bay with a cold front extending south 
of it. 

the aforementioned cold front will progress southward down the 
lake this afternoon and evening, with light 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.


lmz080-669-671-673-675-777-779-870-872-874-876-878-211530-
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-
304 am cdt tue apr 21 2026

sheboygan wi to pentwater mi south...

.today...south winds to 30 kt diminishing to 10 to 20 kt.
scattered rain showers this afternoon. waves 4 to 7 ft
occasionally to 9 ft subsiding to 3 to 5 ft. 
.tonight...south winds 10 to 15 kt backing to north. patchy fog
overnight. waves 2 to 4 ft subsiding to 1 to 3 ft. 
.wednesday...northeast winds 5 to 10 kt. patchy fog. waves 1 to
2 ft. 
.wednesday night...southeast 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. 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 4 to 7 ft occasionally to 9 ft. 
.friday...south winds 15 to 25 kt diminishing to 10 to 20 kt.
rain showers likely. waves 4 to 7 ft occasionally to 9 ft. 
.saturday...north winds 10 to 20 kt. waves 3 to 5 ft.  

$$