fzus61 kcle 201943
glfle 
expires:202608210215;;066819

open lake forecast for lake erie
national weather service cleveland oh
343 pm edt thu aug 20 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 30.10 inches builds into the region through friday.
low pressure 29.90 inches moves into the great lakes region on 
saturday. the low will drag a cold front across the lake saturday
night into sunday.


lez162>164-210215-
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-
343 pm edt thu aug 20 2026

.tonight...east winds 5 to 15 knots. waves 1 to 3 feet. 
.friday...east winds 5 to 10 knots. waves 2 feet or less. 
.friday night...east winds 5 to 10 knots becoming south. waves
1 foot or less. 
.saturday...southwest winds 5 to 10 knots. a chance of showers
and thunderstorms in the afternoon. waves 1 foot or less. 
.saturday night...west winds 10 to 15 knots becoming northwest.
showers with a chance of thunderstorms in the evening, then a
chance of showers overnight. waves 1 to 3 feet. 
.sunday...northwest winds 15 to 20 knots diminishing to 10 to
15 knots. waves 1 to 3 feet. 
.monday...northwest winds 5 to 15 knots becoming west. waves
2 feet or less. 
.tuesday...west winds 5 to 10 knots becoming southwest. waves
1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 201941
glfsc 
expires:202608210345;;066731

lake st clair forecast
national weather service detroit/pontiac mi
341 pm edt thu aug 20 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, 30.00 inches, builds into the great
lakes today and friday. the next low pressure system then arrives
saturday, dragging a cold front across the area and increasing
shower and thunderstorm chances. post-frontal northwest flow
leads to gusty winds sunday.


lcz460-210345-
lake st clair-
341 pm edt thu aug 20 2026

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

$$

fzus63 kdtx 201940
glflh 
expires:202608210345;;066728

open lake forecast for lake huron
national weather service detroit/pontiac mi
340 pm edt thu aug 20 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, 30.00 inches, builds into the great
lakes today and friday. the next low pressure system then arrives
saturday, dragging a cold front across the area and increasing
shower and thunderstorm chances. post-frontal northwest flow
leads to gusty winds sunday.


lhz462>464-210345-
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-
340 pm edt thu aug 20 2026

.tonight...northeast winds 5 to 10 knots veering to the east
after midnight. waves 2 feet or less. 
.friday...southeast winds 5 to 10 knots. waves 2 feet or less. 
.friday night...southeast winds 5 to 10 knots increasing to 10 to
15 knots in the late evening and overnight. waves 1 to 3 feet. 
.saturday...south winds 5 to 10 knots. a chance of 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...west winds 5 to 10 knots becoming northwest
15 to 20 knots in the late evening and overnight. showers likely
and a chance of thunderstorms in the evening...then showers
likely after midnight. waves 1 to 3 feet building to 4 to 6 feet
in the late evening and overnight. waves occasionally around
8 feet. 
.sunday...northwest winds 15 to 20 knots increasing to 20 to
25 knots late in the morning...then decreasing to 15 to 20 knots
late in the evening. gusts to 30 knots. a chance of waterspouts.
a chance of showers. a chance of thunderstorms late in the
afternoon. waves 6 to 9 feet. waves occasionally around 11 feet. 
.monday...northwest winds 15 to 20 knots decreasing to 5 to
10 knots . waves 4 to 6 feet subsiding to 1 to 3 feet by
midnight. waves occasionally around 8 feet. 
.tuesday...west winds 5 to 10 knots backing to the southwest
early in the evening...then becoming south 10 to 15 knots by
midnight. waves 2 feet or less. 


$$

fzus63 kmkx 202059
glflm 
expires:202608210315;;069691

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
359 pm cdt thu aug 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 30.0 inches continues to track through the 
western great lakes region this afternoon. as the high pressure 
exits to the southeast later tonight, south to southwest winds 
will develop. theses winds will increase for friday, along with 
shower and thunderstorm chances, as low pressure around 29.8 
inches moves across the region and drags a cold front through lake
michigan. gusty winds will then shift to the northwest later 
friday night into saturday after the front exits. another high 
pressure system around 30.2 inches is expected to build into the 
region later this weekend, which may maintain gusty northerly 
winds as it moves in.


lmz261-362-364-366-563-565-567-868-210315-
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-
359 pm cdt thu aug 20 2026

sheboygan wi to pentwater mi north...

.tonight...south winds 10 to 20 kt. waves 1 to 3 ft. 
.friday...south winds 10 to 20 kt increasing to 30 kt. chance of
showers in the morning, then chance of showers and slight chance
of thunderstorms in the afternoon. waves 3 to 5 ft building to
4 to 6 ft occasionally to 8 ft. 
.friday night...south winds 10 to 20 kt veering to northwest.
chance of showers. waves 4 to 6 ft occasionally to 8 ft subsiding
to 2 to 4 ft. 
.saturday...northwest winds 15 to 25 kt increasing to 30 kt.
chance of showers in the afternoon. waves 2 to 4 ft. 
.saturday night...north winds to 30 kt diminishing to 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 gales to 35 kt diminishing to 10 to 20 kt.
waves 3 to 5 ft subsiding to 2 to 4 ft. 
.monday...northwest winds 10 to 20 kt increasing to 15 to 25 kt.
waves 1 to 3 ft. 
.tuesday...southwest winds 10 to 20 kt becoming south to 30 kt.
waves 1 to 3 ft building to 3 to 5 ft.  

$$

fzus63 kmkx 202059
glflm 
expires:202608210315;;069692

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
359 pm cdt thu aug 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 30.0 inches continues to track through the 
western great lakes region this afternoon. as the high pressure 
exits to the southeast later tonight, south to southwest winds 
will develop. theses winds will increase for friday, along with 
shower and thunderstorm chances, as low pressure around 29.8 
inches moves across the region and drags a cold front through lake
michigan. gusty winds will then shift to the northwest later 
friday night into saturday after the front exits. another high 
pressure system around 30.2 inches is expected to build into the 
region later this weekend, which may maintain gusty northerly 
winds as it moves in.


lmz080-669-671-673-675-777-779-870-872-874-876-878-210315-
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-
359 pm cdt thu aug 20 2026

sheboygan wi to pentwater mi south...

.tonight...north winds 10 to 15 kt backing to south 10 to 20 kt.
waves 1 to 2 ft. 
.friday...south winds 10 to 20 kt increasing to 15 to 25 kt.
slight chance of showers and thunderstorms in the afternoon.
waves 3 to 5 ft. 
.friday night...south winds 10 to 20 kt veering to west. chance
of showers in the evening, then chance of showers and
thunderstorms overnight. waves 3 to 5 ft subsiding to 1 to 3 ft. 
.saturday...northwest winds 15 to 25 kt becoming north. 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 building to 4 to 7 ft occasionally to 9 ft. 
.sunday...north winds to 30 kt. waves 5 to 8 ft occasionally to
10 ft. 
.sunday night...north winds 15 to 25 kt diminishing to 10 to
15 kt. waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to
4 ft. 
.monday...northwest winds 10 to 20 kt becoming north. waves 1 to
3 ft. 
.tuesday...south winds 10 to 20 kt increasing to 15 to 25 kt.
waves 1 to 3 ft building to 3 to 5 ft.  

$$