fzus61 kcle 211938
glfle 
expires:202604220215;;761298

open lake forecast for lake erie
national weather service cleveland oh
338 pm 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 cold front will push south across lake erie tonight into wednesday 
morning before high pressure 30.10 inches builds overhead from the 
north through thursday. low pressure 29.70 inches will move east 
across the upper great lakes on thursday and will lift a warm front 
across the lake thursday into friday. the low will then extend a 
cold front east across the lower great lakes friday into saturday. 


lez162>164-220215-
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-
338 pm edt tue apr 21 2026

.tonight...southwest winds 5 to 15 knots becoming west. a slight
chance of showers and thunderstorms early, then showers likely
with a slight chance of thunderstorms late this evening. a chance
of showers with a slight chance of thunderstorms after midnight.
waves 2 feet or less. 
.wednesday...northwest winds 10 knots or less becoming southeast.
waves 1 foot or less. 
.wednesday night...southeast winds less than 10 knots becoming
east. waves 1 foot or less. 
.thursday...east winds 10 knots or less. waves 1 foot or less. 
.thursday night...east winds 5 to 10 knots becoming southeast.
waves 1 foot or less. 
.friday...southeast winds 5 to 15 knots becoming northeast. 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. waves
1 to 2 feet. 
.sunday...northeast winds 10 to 15 knots becoming east. waves
2 feet or less. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 211936
glfsc 
expires:202604220400;;761288

lake st clair forecast
national weather service detroit/pontiac mi
336 pm 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 and cold front will pass
through the great lakes this afternoon and evening, bringing a
chance of showers and storms across the south. an area of high
pressure follows wednesday. a warm front then slowly lifts into
the area late thursday into friday as the parent low pressure
stalls over the northern plains.


lcz460-220400-
lake st clair-
336 pm edt tue apr 21 2026

.tonight...southwest winds 10 to 15 knots diminishing to 5 to 10
knots by midnight...then veering to the northwest early in the
morning. mostly cloudy with a chance of light showers in the
evening...then partly cloudy after midnight. waves 2 feet or less.
.wednesday...north winds 5 to 10 knots in the morning becoming light
and variable...then becoming east 5 to 10 knots late in the
afternoon. mostly sunny. waves 2 feet or less.
.wednesday night...northeast winds 5 to 10 knots becoming light and
variable. clear. waves 2 feet or less.
.thursday...light and variable winds becoming southeast 5 to 10
knots in the late morning and afternoon. mostly sunny. waves 2 feet
or less.
.thursday night...southeast winds 5 to 10 knots. mostly clear. waves
2 feet or less.
.friday...east winds 10 to 15 knots. partly sunny in the
morning...then a chance of light showers in the afternoon. mostly
cloudy with light showers likely in the evening. waves 2 feet or
less.
.saturday...north winds 10 to 15 knots. mostly cloudy with light
showers likely. waves 2 feet or less.
.sunday...northeast winds 10 to 15 knots. partly cloudy. waves 2
feet or less.

$$

fzus63 kdtx 211936
glflh 
expires:202604220400;;761259

open lake forecast for lake huron
national weather service detroit/pontiac mi
336 pm 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 and cold front will pass
through the great lakes this afternoon and evening, bringing a
chance of showers and storms across the south. an area of high
pressure follows wednesday. a warm front then slowly lifts into
the area late thursday into friday as the parent low pressure
stalls over the northern plains.


lhz462>464-220400-
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-
336 pm edt tue apr 21 2026

.tonight...south winds 5 to 10 knots veering to the southwest
after midnight...then veering to the northwest early in the
morning. 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...east winds 5 to 10 knots. waves 2 feet or less. 
.thursday night...east winds 5 to 10 knots increasing to 10 to
15 knots after midnight. waves 1 to 3 feet. 
.friday...east winds 10 to 15 knots. a chance of showers late in
the morning. showers likely late in the afternoon. waves 1 to
3 feet building to 3 to 5 feet late in the afternoon. 
.saturday...east winds 10 to 15 knots becoming northeast 5 to
10 knots. showers likely early in the morning...then a chance of
showers in the late morning and early afternoon. waves 3 to
5 feet subsiding to 1 to 3 feet. 
.sunday...north winds 10 to 15 knots decreasing to 5 to 10 knots.
waves 1 to 3 feet. 


$$

fzus63 kmkx 211930
glflm 
expires:202604220315;;761152

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
230 pm 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...

light to modest south winds will shift to light north to 
northeasterly tonight, as a weak cold front passes and high 
pressure moves across ontario and the northern great lakes.
scattered strong thunderstorms will affect far southern lake
michigan this afternoon. 

the high over the northern great lakes will then shift to the
lower great lakes on wednesday. light northeast to east winds on
wednesday will then become southeast wednesday night and increase
thursday into friday, as strong low pressure around 29.2 inches 
develops in the northern plains.


lmz261-362-364-366-563-565-567-868-220315-
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-
230 pm cdt tue apr 21 2026

sheboygan wi to pentwater mi north...

.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 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. waves 4 to 7 ft occasionally to 9 ft. 
.friday...south winds 15 to 25 kt diminishing to 10 to 20 kt.
chance of rain showers in the morning, then rain showers likely
in the afternoon. waves 4 to 7 ft occasionally to 9 ft. 
.friday night...north winds 10 to 20 kt. chance of rain showers.
waves 3 to 5 ft. 
.saturday...north winds 10 to 20 kt becoming northeast. waves
3 to 5 ft. 
.sunday...northeast winds 10 to 20 kt diminishing to 10 to 15 kt.
waves 1 to 3 ft.  

$$

fzus63 kmkx 211930
glflm 
expires:202604220315;;761153

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
230 pm 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...

light to modest south winds will shift to light north to 
northeasterly tonight, as a weak cold front passes and high 
pressure moves across ontario and the northern great lakes.
scattered strong thunderstorms will affect far southern lake
michigan this afternoon. 

the high over the northern great lakes will then shift to the
lower great lakes on wednesday. light northeast to east winds on
wednesday will then become southeast wednesday night and increase
thursday into friday, as strong low pressure around 29.2 inches 
develops in the northern plains.


lmz080-669-671-673-675-777-779-870-872-874-876-878-220315-
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-
230 pm cdt tue apr 21 2026

sheboygan wi to pentwater mi south...

.tonight...south winds 10 to 15 kt backing to north. patchy fog.
waves 2 to 4 ft subsiding to 1 to 3 ft. 
.wednesday...northeast winds 5 to 10 kt. patchy fog in the
morning. waves 1 to 2 ft. 
.wednesday night...east winds 5 to 10 kt veering to south 10 to
15 kt. waves 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. waves 4 to 7 ft
occasionally to 9 ft. 
.friday...south winds 15 to 25 kt diminishing to 10 to 20 kt.
chance of rain showers in the morning, then rain showers likely
in the afternoon. waves 4 to 7 ft occasionally to 9 ft. 
.friday night...northwest winds 10 to 20 kt becoming north.
chance of rain showers. waves 3 to 5 ft. 
.saturday...north winds 10 to 20 kt. waves 3 to 5 ft. 
.sunday...northeast winds 10 to 20 kt diminishing to 10 to 15 kt.
waves 3 to 5 ft.  

$$