fzus61 kcle 122001
glfle 
expires:202608130230;;074839

open lake forecast for lake erie
national weather service cleveland oh
401 pm edt wed aug 12 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 frontal boundary will waver across the ohio valley through
thursday evening with low pressure 29.80 inches moving through
tonight. high pressure 30.20 inches builds into the great lakes
region friday and will drift southeast through saturday evening. a
warm front lifts north across the lake sunday morning followed by
a cold front and low pressure 29.90 inches sunday night. 


lez162>164-130230-
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-
401 pm edt wed aug 12 2026

.tonight...west winds 5 to 10 knots becoming northwest. a chance
of showers and thunderstorms early, then a slight chance of
showers and thunderstorms late this evening. waves 1 foot or
less. 
.thursday...north winds 10 knots or less becoming southeast.
waves 1 foot or less. 
.thursday night...southeast winds 10 knots or less becoming east.
waves 2 feet or less. 
.friday...east winds 5 to 10 knots. waves 1 to 2 feet. 
.friday night...east winds 5 to 10 knots. waves 2 feet or less. 
.saturday...east winds 5 to 10 knots becoming south. a chance of
showers. waves 2 feet or less. 
.sunday...southwest winds around 10 knots becoming northwest. a
chance of showers and thunderstorms during the day, then a chance
of showers sunday night. waves 1 to 2 feet. 
.monday...north winds 5 to 10 knots. waves 2 feet or less. 

winds and waves higher in and near thunderstorms.

$$

fzus63 kdtx 121942
glfsc 
expires:202608130345;;074425

lake st clair forecast
national weather service detroit/pontiac mi
342 pm edt wed aug 12 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 quasi-stationary front holds over the southern great
lakes through thursday, bringing waves of showers and
thunderstorms across the waters. high pressure, 30.00 inches,
will dominate the region to the north of the front. light winds
will be variable over the next 2 days, but maintain an overall
northerly trend over lake huron and southerly toward western lake
erie.


lcz460-130345-
lake st clair-
342 pm edt wed aug 12 2026

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

$$

fzus63 kdtx 121942
glflh 
expires:202608130345;;074394

open lake forecast for lake huron
national weather service detroit/pontiac mi
342 pm edt wed aug 12 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 quasi-stationary front holds over the southern great
lakes through thursday, bringing waves of showers and
thunderstorms across the waters. high pressure, 30.00 inches,
will dominate the region to the north of the front. light winds
will be variable over the next 2 days, but maintain an overall
northerly trend over lake huron and southerly toward western lake
erie.


lhz462>464-130345-
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-
342 pm edt wed aug 12 2026

.tonight...light and variable winds becoming northwest 5 to
10 knots early in the morning. a chance of thunderstorms in the
evening. waves 2 feet or less. 
.thursday...north winds 5 to 10 knots. waves 2 feet or less. 
.thursday night...light and variable winds. waves 2 feet or less.
.friday...north winds 5 to 10 knots. waves 1 to 3 feet. 
.friday night...northeast winds 5 to 10 knots veering to the east
after midnight. waves 2 to 4 feet subsiding to 1 to 3 feet after
midnight. 
.saturday...southeast winds 5 to 10 knots. a chance of showers
late in the evening. waves 1 to 3 feet. 
.sunday...south winds 5 to 10 knots increasing to 10 to 15 knots
in the late morning and early afternoon...then becoming northwest
5 to 10 knots early in the evening becoming north 10 to 15 knots
by midnight. a chance of showers. a chance of thunderstorms early
in the evening. waves 1 to 3 feet. 
.monday...north winds 10 to 15 knots becoming light and variable.
waves 1 to 3 feet. 


$$

fzus63 kmkx 121953
glflm 
expires:202608130315;;074671

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
253 pm cdt wed aug 12 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...

a stalled frontal boundary just to the south of lake michigan will 
remain into mid day thursday before retreating south toward the ohio 
river valley. periodic rain, storms and patchy fog will be 
possible across the southern half of the lake until this front 
moves south. light and variable winds are expected across the lake
into thursday night. 

high pressure around 30.3 inches is expected to build down from 
ontario into the eastern great lakes thursday night into friday. 
northeast to east winds will increase across the lake becoming 
breezy as the high pressure builds in and a low pressure system 
develops across the central plains. as the low pressure around 29.9 
inches moves northeast toward the great lakes region, the high 
pressure will be slowly moving northeast toward the new england 
states. winds will turn to southeasterly and remain breezy saturday 
ahead of the approaching low. this low is expected to track 
across the lake late saturday into sunday. rain and thunderstorms 
will be possible across the lake saturday into saturday night. as 
the low exits to the northeast sunday, high pressure around 30.2 
inches is expected to move in from the northern plains for early 
next week. 


lmz261-362-364-366-563-565-567-868-130315-
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-
253 pm cdt wed aug 12 2026

sheboygan wi to pentwater mi north...

.tonight...north winds 10 to 15 kt becoming northeast less than
10 kt. waves 1 ft or less. 
.thursday...northeast winds 5 to 10 kt increasing to 10 to 15 kt.
waves nearly calm. 
.thursday night...northeast winds 5 to 10 kt increasing to 10 to
15 kt. waves 1 to 2 ft. 
.friday...northeast winds 10 to 15 kt increasing to 10 to 20 kt.
waves 1 to 3 ft. 
.friday night...northeast winds 10 to 20 kt becoming east. waves
2 to 4 ft. 
.saturday...southeast winds 15 to 25 kt. waves 2 to 4 ft. 
.saturday night...southeast winds 10 to 20 kt becoming southwest.
chance of showers and thunderstorms. waves 1 to 3 ft. 
.sunday...northwest winds 10 to 20 kt becoming north 15 to 25 kt.
waves 1 to 3 ft. 
.monday...north winds 10 to 15 kt becoming west 10 to 20 kt.
waves 1 to 2 ft.  

$$

fzus63 kmkx 121953
glflm 
expires:202608130315;;074672

open lake forecast for lake michigan
national weather service milwaukee/sullivan wi
253 pm cdt wed aug 12 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...

a stalled frontal boundary just to the south of lake michigan will 
remain into mid day thursday before retreating south toward the ohio 
river valley. periodic rain, storms and patchy fog will be 
possible across the southern half of the lake until this front 
moves south. light and variable winds are expected across the lake
into thursday night. 

high pressure around 30.3 inches is expected to build down from 
ontario into the eastern great lakes thursday night into friday. 
northeast to east winds will increase across the lake becoming 
breezy as the high pressure builds in and a low pressure system 
develops across the central plains. as the low pressure around 29.9 
inches moves northeast toward the great lakes region, the high 
pressure will be slowly moving northeast toward the new england 
states. winds will turn to southeasterly and remain breezy saturday 
ahead of the approaching low. this low is expected to track 
across the lake late saturday into sunday. rain and thunderstorms 
will be possible across the lake saturday into saturday night. as 
the low exits to the northeast sunday, high pressure around 30.2 
inches is expected to move in from the northern plains for early 
next week. 


lmz080-669-671-673-675-777-779-870-872-874-876-878-130315-
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-
253 pm cdt wed aug 12 2026

sheboygan wi to pentwater mi south...

.tonight...north winds 5 to 10 kt becoming northeast. patchy fog
overnight. waves 1 ft or less. 
.thursday...east winds 5 to 10 kt becoming northeast. patchy fog
in the morning. chance of showers in the afternoon. waves 1 ft or
less. 
.thursday night...northeast winds 5 to 10 kt becoming east 10 to
15 kt. chance of showers overnight. waves 1 to 2 ft. 
.friday...east winds 10 to 15 kt becoming northeast 10 to 20 kt.
chance of showers in the morning. waves 1 to 3 ft. 
.friday night...northeast winds 10 to 20 kt becoming east. chance
of showers and thunderstorms in the evening, then chance of
showers overnight. waves 2 to 4 ft. 
.saturday...southeast winds 15 to 25 kt. chance of showers. waves
3 to 5 ft. 
.saturday night...south winds 10 to 20 kt becoming southwest
10 to 15 kt. chance of showers and thunderstorms. waves 1 to
3 ft. 
.sunday...northwest winds 10 to 20 kt becoming north. chance of
showers and thunderstorms. waves 1 to 3 ft. 
.monday...north winds 10 to 20 kt. waves 2 to 4 ft.  

$$