912
FZUS63 KMKX 251359
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
859 AM CDT Wed Jun 25 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...

No major changes to the expected. A weak, nearly stationary
frontal boundary will linger across the southern third to southern
half of the lake through Thursday, bringing multiple rounds of
thunderstorms. Isolated thunderstorms are also possible across the
northern half. Expect modest northeasterly winds north of the
frontal boundary, with modest southeasterly winds south of the
boundary. Thursday night, expecting the front to lift northward
ahead of approaching low pressure of 29.8 inches, bringing south
southwest winds to the open waters. As the low pressure exits to
the east, expect a wind shift to westerly on Friday into Friday
night.

LMZ261-362-364-366-563-565-567-868-251515-
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-
859 AM CDT Wed Jun 25 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TODAY...Northeast winds 10 to 20 kt diminishing to 10 to 15 kt.
Waves 1 to 3 ft.
.TONIGHT...Northeast winds 10 to 15 kt becoming east 10 to 20 kt.
Chance of showers and thunderstorms in the evening, then showers
likely with a chance of thunderstorms overnight. Waves 1 to 3 ft
building to 2 to 4 ft.
.THURSDAY...East winds 15 to 25 kt becoming northeast to 30 kt.
Chance of showers. Waves 2 to 4 ft.
.THURSDAY NIGHT...East winds to 30 kt becoming south 15 to 25 kt.
Showers with a chance of thunderstorms. Waves 3 to 5 ft.
.FRIDAY...Southwest winds 10 to 20 kt becoming northwest. Chance
of showers. Waves 2 to 4 ft.
.FRIDAY NIGHT...North winds 10 to 20 kt diminishing to 5 to
10 kt. Waves 1 to 2 ft.
.SATURDAY...Northeast winds 5 to 10 kt veering to south. Waves
1 ft or less.
.SUNDAY...South winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 1 to 2 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-251515-
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-
859 AM CDT Wed Jun 25 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TODAY...North winds 10 to 20 kt diminishing to 10 to 15 kt.
Patchy fog this morning. Chance of showers and slight chance of
thunderstorms. Waves 1 to 3 ft.
.TONIGHT...Northeast winds 5 to 10 kt veering to south. Chance of
showers and thunderstorms. Patchy fog overnight. Waves 1 to 2 ft.
.THURSDAY...South winds 10 to 15 kt becoming southeast. Patchy
fog in the morning. Chance of showers in the morning, then chance
of showers and thunderstorms in the afternoon. Waves 1 to 2 ft.
.THURSDAY NIGHT...South winds 10 to 15 kt becoming southwest.
Chance of showers and thunderstorms in the evening, then chance
of showers overnight. Waves 1 to 3 ft.
.FRIDAY...Southwest winds 10 to 20 kt becoming west. Chance of
showers. Waves 1 to 3 ft.
.FRIDAY NIGHT...North winds 10 to 15 kt diminishing to 5 to
10 kt. Waves 1 to 3 ft.
.SATURDAY...Northeast winds 5 to 10 kt becoming east. Waves 1 ft
or less.
.SUNDAY...South winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 1 to 2 ft.

$$

LMZ761-251515-
MAFOR 2510/
MICHIGAN NORTH 11120 14110 11110 11126 11226. A chance of
thunderstorms tonight. Waves 2 feet or less today. Waves 1 to 3
feet tonight.

MICHIGAN SOUTH 11820 11110 19114 12810 12100 11310 11400. A
chance of showers today. A chance of showers and thunderstorms
tonight. Waves 2 feet or less.

$$


Patterson

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

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