fzus61 kcle 211944
glfle 
expires:202608220215;;125070

open lake forecast for lake erie
national weather service cleveland oh
344 pm edt fri aug 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...
high pressure 30.00 inches lingers over the lake this evening 
ahead of a cold front approaching from the west. pressure drops
steadily to 29.80 inches with the passage of the cold front
saturday late afternoon/evening. high pressure slowly builds back
in sunday and monday to 30.00 inches over lake erie on tuesday.



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-
344 pm edt fri aug 21 2026

.tonight...east winds 5 to 10 knots becoming south. a chance of
showers and thunderstorms late this evening. a chance of showers
with a slight chance of thunderstorms after midnight, then a
chance of showers and thunderstorms late. waves 1 foot or less. 
.saturday...southwest winds 10 to 15 knots. a chance of showers
and thunderstorms in the morning, then showers with a chance of
thunderstorms in the afternoon. waves 1 to 2 feet. 
.saturday night...west winds 10 to 15 knots becoming northwest
15 to 20 knots. showers likely with a chance of thunderstorms in
the evening. waves 1 to 3 feet. 
.sunday...northwest winds 15 to 20 knots becoming west. waves
2 to 4 feet subsiding to 1 to 3 feet. 
.sunday night...northwest winds 10 to 15 knots. waves 1 to
3 feet. 
.monday...northwest winds 5 to 15 knots becoming west. waves 1 to
3 feet subsiding to 1 foot or less. 
.tuesday...west winds 5 to 10 knots becoming southwest. waves
1 foot or less. 
.wednesday...southwest winds 5 to 10 knots. a chance of showers
wednesday night. waves 1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 211930
glfsc 
expires:202608220330;;124669

lake st clair forecast
national weather service detroit/pontiac mi
330 pm edt fri aug 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 cold front will move across the great lakes tomorrow
morning which will veer wind direction to the northwest. showers
and thunderstorms are expected just ahead of and along the front.
post-frontal northwest flow leads to gusty winds through the day
on sunday.


lcz460-220330-
lake st clair-
330 pm edt fri aug 21 2026

.tonight...southeast winds 10 to 15 knots becoming south 5 to 10
knots after midnight. partly cloudy in the evening...then mostly
cloudy with scattered light showers and a chance of thunderstorms
after midnight. waves 2 feet or less.
.saturday...southwest winds 5 to 10 knots. mostly cloudy. scattered
light showers early in the morning. numerous showers in the late
morning and afternoon. a chance of thunderstorms in the afternoon.
waves 2 feet or less.
.saturday night...northwest winds 10 to 15 knots increasing to 15 to
20 knots in the late evening and overnight. partly cloudy until
early morning then clearing. scattered light showers and a chance of
thunderstorms early in the evening. waves 2 feet or less.
.sunday...northwest winds 15 to 20 knots diminishing to 10 to 15
knots early in the afternoon. partly sunny. scattered light showers
early in the afternoon. waves 1 to 3 feet.
.sunday night...northwest winds 10 to 15 knots. mostly cloudy early
in the evening becoming partly cloudy. scattered light showers early
in the evening. waves 2 feet or less.
.monday...northwest winds 10 to 15 knots diminishing to 5 to 10
knots in the evening. sunny in the morning becoming mostly clear.
waves 2 feet or less.
.tuesday...south winds 5 to 10 knots. mostly clear. waves 2 feet or
less.
.wednesday...south winds 10 to 15 knots. partly cloudy. a chance of
showers. waves 2 feet or less.

$$

fzus63 kdtx 211930
glflh 
expires:202608220330;;124665

open lake forecast for lake huron
national weather service detroit/pontiac mi
330 pm edt fri aug 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 cold front will move across the great lakes tomorrow
morning which will veer wind direction to the northwest. showers
and thunderstorms are expected just ahead of and along the front.
post-frontal northwest flow leads to gusty winds through the day
on sunday.


lhz462>464-220330-
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-
330 pm edt fri aug 21 2026

.tonight...southeast winds 10 to 15 knots. scattered showers
after midnight. a chance of waterspouts after midnight. waves
1 to 3 feet building to 2 to 4 feet after midnight. 
.saturday...south winds 10 to 15 knots decreasing to 5 to
10 knots in the late morning and early afternoon...then backing
to the southeast late in the afternoon. numerous showers in the
morning...then showers and a chance of thunderstorms in the
afternoon. a chance of waterspouts. waves 1 to 3 feet. 
.saturday night...north winds 10 to 15 knots becoming northwest
15 to 20 knots in the late evening and overnight. a chance of
waterspouts in the evening. numerous showers and a chance of
thunderstorms in the evening...then scattered showers after
midnight. waves 1 to 3 feet building to 5 to 7 feet in the late
evening and overnight. waves occasionally around 10 feet. 
.sunday...northwest winds 15 to 20 knots increasing to 20 to
25 knots in the late morning and early afternoon...then
decreasing to 15 to 20 knots early in the afternoon. gusts to
30 knots. numerous showers in the morning...then numerous showers
and a chance of thunderstorms in the afternoon. waves 6 to
9 feet. waves occasionally around 12 feet. 
.sunday night...northwest winds 15 to 20 knots. gusts to 30 knots
early in the evening. numerous showers and a chance of
thunderstorms in the evening...then scattered showers after
midnight. waves 6 to 9 feet. waves occasionally around 12 feet. 
.monday...northwest winds 15 to 20 knots decreasing to 5 to
10 knots late in the afternoon. waves 3 to 5 feet subsiding to
1 to 3 feet late in the evening. 
.tuesday...west winds 5 to 10 knots veering to the northeast
early in the evening...then veering to the south by midnight.
waves 2 feet or less. 
.wednesday...southwest winds 5 to 10 knots becoming south 10 to
15 knots . a chance of showers . waves 1 to 3 feet. 


$$

fzus63 kmkx 212014
glflm 
expires:202608220300;;127317

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
313 pm cdt fri aug 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...

south to southwest winds will increase today as a low pressure 
trough of 29.8 inches approaches southern wisconsin from the 
minnesota arrowhead. ongoing thunderstorms over the far southern 
open waters will vacate this afternoon, with more storm development 
possible into this evening. a few storms could be strong with 
gusty winds, and hail. the aforementioned trough will cross lake
michigan from north to south tonight and bring a wind shift to 
the northwest. then look for gusty northerly winds to develop 
along a cold front that will track from north to south down lake
michigan saturday evening. a few thunderstorms are possible 
along this front. northerly winds will persist through sunday as
low pressure around 29.6 inches tracks from lower michigan to 
ontario. variable winds are expected for monday and tuesday as 
high pressure of 30.1 inches crosses the upper great lakes.


lmz261-362-364-366-563-565-567-868-220300-
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-
313 pm cdt fri aug 21 2026

sheboygan wi to pentwater mi north...

.tonight...south winds 10 to 20 kt veering to north. chance of
showers and thunderstorms this evening, then chance of showers
and slight chance of thunderstorms overnight. waves 3 to 5 ft
subsiding to 1 to 3 ft. 
.saturday...north winds 10 to 20 kt becoming northwest to 30 kt.
chance of showers and thunderstorms in the afternoon. waves 3 to
5 ft. 
.saturday night...north winds to 30 kt becoming northwest 15 to
25 kt. waves 4 to 6 ft occasionally to 8 ft. 
.sunday...north winds to 30 kt. waves 4 to 6 ft occasionally to
8 ft. 
.sunday night...north winds to 30 kt diminishing to 10 to 20 kt
overnight. waves 3 to 5 ft subsiding to 1 to 3 ft. 
.monday...northwest winds 10 to 20 kt. waves 1 to 2 ft. 
.monday night...southwest winds 10 to 20 kt diminishing to 5 to
10 kt. waves 1 to 2 ft. 
.tuesday...southwest winds 10 to 20 kt increasing to 15 to 25 kt.
waves 1 to 3 ft building to 2 to 4 ft. 
.wednesday...southwest winds 15 to 25 kt increasing to 30 kt.
chance of showers. waves 3 to 5 ft.  

$$

fzus63 kmkx 212014
glflm 
expires:202608220300;;127318

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
313 pm cdt fri aug 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...

south to southwest winds will increase today as a low pressure 
trough of 29.8 inches approaches southern wisconsin from the 
minnesota arrowhead. ongoing thunderstorms over the far southern 
open waters will vacate this afternoon, with more storm development 
possible into this evening. a few storms could be strong with 
gusty winds, and hail. the aforementioned trough will cross lake
michigan from north to south tonight and bring a wind shift to 
the northwest. then look for gusty northerly winds to develop 
along a cold front that will track from north to south down lake
michigan saturday evening. a few thunderstorms are possible 
along this front. northerly winds will persist through sunday as
low pressure around 29.6 inches tracks from lower michigan to 
ontario. variable winds are expected for monday and tuesday as 
high pressure of 30.1 inches crosses the upper great lakes.


lmz080-669-671-673-675-870-872-874-876-878-220300-
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 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-
313 pm cdt fri aug 21 2026

sheboygan wi to pentwater mi south to winthrop harbor il to south
haven mi...

.tonight...south winds 10 to 20 kt veering to northwest. chance
of showers and thunderstorms this evening, then chance of showers
and slight chance of thunderstorms overnight. waves 3 to 5 ft
subsiding to 2 to 4 ft. 
.saturday...northwest winds 10 to 20 kt becoming north 15 to
25 kt. slight chance of showers and thunderstorms in the
afternoon. waves 4 to 6 ft occasionally to 8 ft. 
.saturday night...north winds 15 to 25 kt. waves 4 to 6 ft
occasionally to 8 ft. 
.sunday...north winds to 30 kt. waves 5 to 8 ft occasionally to
10 ft. 
.sunday night...north winds 15 to 25 kt becoming northwest 10 to
15 kt overnight. waves 4 to 6 ft occasionally to 8 ft subsiding
to 2 to 4 ft. 
.monday...north winds 10 to 15 kt. waves 1 to 2 ft. 
.monday night...east winds 5 to 10 kt veering to south. waves
1 to 2 ft. 
.tuesday...south winds 10 to 20 kt increasing to 15 to 25 kt.
waves 1 to 3 ft building to 2 to 4 ft. 
.wednesday...southwest winds 15 to 25 kt. waves 3 to 5 ft.  

$$

fzus63 kmkx 211906
glflm 
expires:202608220315;;123646

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
206 pm cdt fri aug 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...

south to southwest winds will increase today as a low pressure 
trough of 29.8 inches approaches southern wisconsin from the 
minnesota arrowhead. ongoing thunderstorms over the far southern 
open waters will vacate this afternoon, with more storm development 
possible into this evening. a few storms could be strong with 
gusty winds, and hail. the aforementioned trough will cross lake
michigan from north to south tonight and bring a wind shift to 
the northwest. then look for gusty northerly winds to develop 
along a cold front that will track from north to south down lake
michigan saturday evening. a few thunderstorms are possible 
along this front. northerly winds will persist through sunday as
low pressure around 29.6 inches tracks from lower michigan to 
ontario. variable winds are expected for monday and tuesday as 
high pressure of 30.1 inches crosses the upper great lakes.


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-
206 pm cdt fri aug 21 2026

sheboygan wi to pentwater mi south...

.tonight...south winds 10 to 20 kt veering to northwest. chance
of showers and thunderstorms this evening, then chance of showers
and slight chance of thunderstorms overnight. waves 3 to 5 ft
subsiding to 2 to 4 ft. 
.saturday...northwest winds 10 to 20 kt becoming north 15 to
25 kt. slight chance of showers and thunderstorms in the
afternoon. waves 4 to 6 ft occasionally to 8 ft. 
.saturday night...north winds 15 to 25 kt. waves 4 to 6 ft
occasionally to 8 ft. 
.sunday...north winds to 30 kt. waves 5 to 8 ft occasionally to
10 ft. 
.sunday night...north winds 15 to 25 kt becoming northwest 10 to
15 kt overnight. waves 4 to 6 ft occasionally to 8 ft subsiding
to 2 to 4 ft. 
.monday...north winds 10 to 15 kt. waves 1 to 2 ft. 
.monday night...east winds 5 to 10 kt veering to south. waves
1 to 2 ft. 
.tuesday...south winds 10 to 20 kt increasing to 15 to 25 kt.
waves 1 to 3 ft building to 2 to 4 ft. 
.wednesday...southwest winds 15 to 25 kt. waves 3 to 5 ft.  

$$