483
FZUS63 KMKX 300156
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
856 PM CDT Thu May 29 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...

High pressure of 30.2 inches centered over the central Plains
will continue to bring light winds across much of the Lake
tonight. Higher southwesterly winds in the northern third will
continue as low pressure of 29.4 inches continues to pivot
southeastward through northern Quebec. A cold front from this low
pressure system will progress south-southwest across Lake
Michigan Friday afternoon and evening, bringing a quick wind shift
to northerly. In addition, scattered thunderstorms may develop
along this front, especially across the southern half of the lake.
High pressure around 29.9 inches will then build into the region
and bring decreasing winds over the weekend.

LMZ261-362-364-366-563-565-567-868-300915-
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-
856 PM CDT Thu May 29 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TONIGHT...Southwest winds 10 to 20 kt. Waves 1 to 3 ft.
.FRIDAY...Southwest winds 10 to 20 kt becoming west 15 to 25 kt.
Chance of showers in the morning, then chance of showers and
slight chance of thunderstorms in the afternoon. Patchy smoke in
the afternoon. Waves 1 to 3 ft.
.FRIDAY NIGHT...Northwest winds 15 to 25 kt becoming north 10 to
20 kt. Patchy smoke in the evening. Waves 2 to 4 ft.
.SATURDAY...North winds 10 to 20 kt. Waves 1 to 3 ft.
.SATURDAY NIGHT...North winds 10 to 20 kt becoming northwest
10 to 15 kt. Waves 1 to 3 ft.
.SUNDAY...Northwest winds 10 to 15 kt backing to southwest 10 to
20 kt. Waves 1 to 2 ft.
.SUNDAY NIGHT...Southwest winds 10 to 15 kt. Waves 1 to 2 ft.
.MONDAY...South winds 10 to 20 kt. Waves 1 to 3 ft.
.TUESDAY...South winds 15 to 25 kt increasing to 30 kt. Waves
4 to 6 ft occasionally to 8 ft building to 4 to 7 ft occasionally
to 9 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-300915-
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-
856 PM CDT Thu May 29 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TONIGHT...South winds 5 to 10 kt becoming west. Waves
1 ft or less.
.FRIDAY...West winds 10 to 15 kt increasing to 10 to 20 kt.
Patchy smoke in the afternoon. Chance of showers and
thunderstorms in the afternoon. Waves 1 to 2 ft.
.FRIDAY NIGHT...Northwest winds 10 to 20 kt becoming north.
Chance of showers and thunderstorms in the evening. Patchy smoke.
Waves 2 to 4 ft.
.SATURDAY...North winds 10 to 20 kt. Waves 2 to 4 ft.
.SATURDAY NIGHT...North winds 10 to 20 kt diminishing to 5 to
10 kt overnight. Waves 2 to 4 ft subsiding to 1 to 2 ft.
.SUNDAY...North winds 10 to 15 kt becoming west. Waves 1 to 2 ft.
.SUNDAY NIGHT...South winds 5 to 10 kt increasing to 10 to 15 kt.
Waves 1 to 2 ft.
.MONDAY...Southwest winds 10 to 15 kt becoming south 10 to 20 kt.
Waves 1 to 3 ft.
.TUESDAY...South winds 15 to 25 kt increasing to 30 kt. Waves
4 to 6 ft occasionally to 8 ft building to 4 to 7 ft occasionally
to 9 ft.

$$

LMZ761-300915-
MAFOR 3004/
MICHIGAN NORTH 13520 12610 11636 11730 11820. Waves 2 feet or
less overnight and Friday. Waves 1 to 3 feet Friday evening.

MICHIGAN SOUTH 11500 14610 11620 12720. A chance of showers and
thunderstorms Friday afternoon and Friday evening. Waves 2 feet
or less.

$$


DDV

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

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