886
FZUS63 KMKX 180750
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
250 AM CDT Wed Jun 18 2025

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...

Low pressure around 29.2 inches will move into northeast Quebec
today and likely into the eastern Atlantic. Its cold front
extending across southern Lake Michigan stalled and remains across
the southern Lake this morning. Another developing low pressure
area will deepen to around 29.6 inches as it tracks through
southern Lake Michigan today.

Variable winds are expected to continue into today as the low
pressure tracks across IL and southern Lake Michigan through the
afternoon. Modest north to northwest winds are then forecast in
the wake of the low for tonight into Thursday morning before
turning westerly.

LMZ261-362-364-366-563-565-567-868-181530-
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-
250 AM CDT Wed Jun 18 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TODAY...Southeast winds 5 to 10 kt becoming east. Patchy fog
this morning. Chance of showers this morning, then chance of
showers and slight chance of thunderstorms this afternoon. Waves
1 to 3 ft.
.TONIGHT...Northeast winds 10 to 15 kt backing to northwest.
Chance of showers and slight chance of thunderstorms. Waves 1 to
3 ft.
.THURSDAY...Northwest winds 5 to 10 kt backing to southwest 10 to
15 kt. Chance of showers in the afternoon. Waves 1 to 3 ft.
.THURSDAY NIGHT...Southwest winds 10 to 15 kt. Chance of showers.
Waves 1 to 2 ft.
.FRIDAY...Southwest winds 10 to 20 kt becoming south. Chance of
showers in the morning. Waves 1 to 3 ft building to 2 to 4 ft.
.FRIDAY NIGHT...South winds 10 to 20 kt increasing to 15 to
25 kt. Chance of showers. Waves 3 to 5 ft building to 4 to 7 ft
occasionally to 9 ft.
.SATURDAY...South winds to 30 kt. Chance of showers and
thunderstorms. Waves 5 to 8 ft occasionally to 10 ft.
.SUNDAY...South winds to 30 kt. Waves 4 to 7 ft occasionally to
9 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-181530-
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-
250 AM CDT Wed Jun 18 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TODAY...South winds 5 to 10 kt backing to northeast 10 to 15 kt.
Patchy fog this morning. Chance of showers and slight chance of
thunderstorms this morning, then chance of showers and
thunderstorms this afternoon. Waves 1 to 2 ft building to 1 to
3 ft.
.TONIGHT...Northwest winds 10 to 15 kt increasing to 10 to 20 kt.
Showers likely with a chance of thunderstorms in the evening,
then chance of showers and slight chance of thunderstorms
overnight. Waves 3 to 5 ft.
.THURSDAY...Northwest winds 10 to 15 kt backing to south 5 to
10 kt. Chance of showers in the morning. Waves 2 to 4 ft
subsiding to 1 to 3 ft.
.THURSDAY NIGHT...Southwest winds 5 to 10 kt increasing to 10 to
15 kt. Waves 1 to 3 ft.
.FRIDAY...Southwest winds 10 to 20 kt becoming south. Waves 1 to
3 ft building to 2 to 4 ft.
.FRIDAY NIGHT...South winds 10 to 20 kt increasing to 30 kt.
Waves 3 to 5 ft building to 4 to 7 ft occasionally to 9 ft.
.SATURDAY...South winds to 30 kt. Waves 5 to 8 ft occasionally to
10 ft.
.SUNDAY...South winds 15 to 25 kt. Waves 4 to 7 ft occasionally
to 9 ft.

$$

LMZ761-181530-
MAFOR 1810/
MICHIGAN NORTH 13300 11210 12110 12810. A chance of showers.
Waves 2 feet or less today. Waves 1 to 3 feet tonight.

MICHIGAN SOUTH 11300 11400 11300 11116 11816 11716 12720. A
chance of thunderstorms this afternoon and evening. Waves 1 to 3
feet today. Waves 1 to 3 feet building to 2 to 4 feet tonight.

$$


Kuroski

Experimental modernized open lake forecast is available online at
weather.gov/mkx/glftable

Graphical marine forecasts are available online at:
weather.gov/greatlakes