525
FZUS63 KMKX 191351
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
851 AM CDT Sat Apr 19 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...

Drier conditions and lighter northerly winds are expected today
as high pressure around 30.2 inches begins to build in from the
west. Variable winds are expected overnight tonight as the high
pushes over Lake Michigan and builds to around 30.5 inches. High
pressure quickly shifts eastward on Sunday as low pressure lifts
into the area from the southern Plains. Expect increasing east to
northeasterly winds to develop Sunday as Lake Michigan sits in
between the departing high and an approaching low. As the low
pressure lifts northeastward across the northern half of Lake
Michigan, it will deepen to around 29.5 inches Monday with
southerly winds ahead of it during the day then becoming northwest
behind it Monday night. Higher waves are expected on to accompany
the breezier southerly winds, particularly across the central
half of the lake.

LMZ261-362-364-366-563-565-567-868-191515-
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-
851 AM CDT Sat Apr 19 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TODAY...Northwest winds 10 to 20 kt becoming north. Waves 2 to
4 ft.
.TONIGHT...Northeast winds 10 to 20 kt becoming east 10 to 15 kt.
Waves 1 to 3 ft subsiding to 1 to 2 ft.
.SUNDAY...East winds 10 to 15 kt becoming northeast 10 to 20 kt.
Waves 1 to 3 ft.
.SUNDAY NIGHT...East winds 15 to 25 kt increasing to 30 kt.
Chance of rain showers in the evening, then rain showers
overnight. Waves 2 to 4 ft building to 5 to 8 ft occasionally to
10 ft.
.MONDAY...Southeast winds to 30 kt becoming south. Rain showers
in the morning, then rain showers likely in the afternoon. Waves
6 to 9 ft occasionally to 12 ft.
.MONDAY NIGHT...West winds to 30 kt becoming northwest. Chance of
rain showers. Waves 6 to 9 ft occasionally to 12 ft subsiding to
4 to 6 ft occasionally to 8 ft.
.TUESDAY...West winds 15 to 25 kt becoming southwest 10 to 20 kt.
Waves 3 to 5 ft subsiding to 2 to 4 ft.
.WEDNESDAY...Southeast winds 10 to 20 kt becoming south. Waves
1 to 3 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-191515-
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-
851 AM CDT Sat Apr 19 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TODAY...Northwest winds 10 to 20 kt becoming northeast 10 to
15 kt. Waves 3 to 5 ft subsiding to 1 to 3 ft.
.TONIGHT...East winds 5 to 10 kt increasing to 10 to 15 kt. Waves
1 to 2 ft.
.SUNDAY...East winds 10 to 20 kt. Chance of rain showers in the
afternoon. Waves 2 to 4 ft.
.SUNDAY NIGHT...East winds 15 to 25 kt becoming southeast to
30 kt. Rain showers likely in the evening, then rain showers
overnight. Waves 4 to 6 ft occasionally to 8 ft building to 5 to
8 ft occasionally to 10 ft.
.MONDAY...South winds to 30 kt becoming southwest. Rain showers
likely in the morning, then chance of rain showers in the
afternoon. Waves 6 to 9 ft occasionally to 12 ft.
.MONDAY NIGHT...West winds 15 to 25 kt. Waves 6 to 9 ft
occasionally to 12 ft subsiding to 4 to 6 ft occasionally to
8 ft.
.TUESDAY...West winds 10 to 20 kt backing to east 10 to 15 kt.
Waves 3 to 5 ft subsiding to 1 to 3 ft.
.WEDNESDAY...South winds 10 to 20 kt becoming southeast. Waves
1 to 3 ft.

$$

LMZ761-191515-
MAFOR 1910/
MICHIGAN NORTH 13720 11820 11120 12110 11210. Waves 2 to 4 feet
subsiding to 1 to 3 feet today. Waves 2 feet or less tonight.

MICHIGAN SOUTH 11720 12710 11110 11210 13100. Waves 3 to 5 feet
subsiding to 1 to 3 feet today. Waves 2 feet or less tonight.

$$


Boxell

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

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