684
FZUS63 KMKX 250159
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
859 PM CDT Tue Jun 24 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...

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, bringing south southwest winds to the open waters. As
low pressure exits to the east, expect a wind shift to westerly on
Friday into Friday night.

LMZ261-362-364-366-563-565-567-868-250915-
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 PM CDT Tue Jun 24 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TONIGHT...North winds 10 to 15 kt becoming northeast
10 to 20 kt. Patchy fog. Slight chance of showers overnight.
Waves 1 to 3 ft.
.WEDNESDAY...Northeast winds 10 to 20 kt diminishing to 10 to
15 kt. Slight chance of showers in the morning, then chance of
showers in the afternoon. Waves 1 to 3 ft.
.WEDNESDAY NIGHT...Northeast winds 10 to 15 kt becoming east.
Chance of showers in the evening, then showers with a chance of
thunderstorms overnight. Waves 1 to 2 ft.
.THURSDAY...East winds 10 to 20 kt becoming northeast. Showers
likely. Waves 1 to 3 ft.
.THURSDAY NIGHT...East winds 10 to 20 kt becoming southeast.
Showers with a chance of thunderstorms in the evening, then
showers likely with a chance of thunderstorms overnight. Waves
2 to 4 ft.
.FRIDAY...Southwest winds 10 to 20 kt becoming west. Chance of
showers in the morning. Waves 1 to 3 ft.
.FRIDAY NIGHT...Northwest winds 10 to 20 kt becoming north 5 to
10 kt. Waves 1 to 3 ft.
.SATURDAY...Northwest winds 5 to 10 kt backing to southwest 10 to
15 kt. Waves 1 ft or less.
.SUNDAY...South winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 1 to 2 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-250915-
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 PM CDT Tue Jun 24 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

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

$$

LMZ761-250915-
MAFOR 2504/
MICHIGAN NORTH 11120 13120 14110. A chance of showers Wednesday
afternoon and Wednesday evening. Waves 2 feet or less overnight.
Waves 1 to 3 feet Wednesday. Waves 2 feet or less Wednesday
evening.

MICHIGAN SOUTH 11810 13820 12810 12110. A chance of showers and
thunderstorms late this evening, then a chance of showers
overnight. A chance of showers Wednesday. Waves 2 feet or less
overnight. Waves 1 to 3 feet Wednesday. Waves 2 feet or less
Wednesday evening.

$$


Cronce

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

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