998
FZUS63 KMKX 122100
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
300 PM CST Wed Nov 12 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...

Brisk northwest winds will continue into this evening as low
pressure around 29.6 inches gradually pushes out of the Great
Lakes region. The low will push east tonight as higher pressure
around 30.1 inches and a weaker pressure gradient move in from
the west. This surface high will then move east across the lake
Thursday night with light winds becoming variable. Modest
southeast winds will then develop for Friday as another strong low
begins to move east across southern Canada. Breezy southerly
winds will develop Friday night into Saturday as the Canadian low
continues eastward. Its strong cold frontal passage will then
shift winds to brisk northwesterly for Saturday night into Sunday
over the lake. Gales will be possible on the cold advection side
behind the frontal passage Sunday.

LMZ261-362-364-366-563-565-567-868-130415-
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-
300 PM CST Wed Nov 12 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TONIGHT...Northwest winds to 30 kt. Slight chance of rain this
evening. Waves 4 to 7 ft occasionally to 9 ft.
.THURSDAY...West winds 15 to 25 kt. Waves 4 to 6 ft occasionally
to 8 ft subsiding to 3 to 5 ft.
.THURSDAY NIGHT...West winds 10 to 20 kt becoming northwest 5 to
10 kt after midnight, then becoming north late. Waves 2 to 4 ft
subsiding to 1 to 2 ft.
.FRIDAY...Southeast winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 1 to 2 ft building to 1 to 3 ft.
.FRIDAY NIGHT...South winds 10 to 20 kt increasing to 15 to
25 kt. Waves 2 to 4 ft building to 4 to 6 ft occasionally to
8 ft.
.SATURDAY...South winds 15 to 25 kt becoming west to 30 kt.
Chance of rain. Waves 5 to 8 ft occasionally to 10 ft.
.SATURDAY NIGHT...Northwest gales to 35 kt increasing to gales to
40 kt. Chance of rain and snow. Waves 6 to 9 ft occasionally to
12 ft building to 8 to 11 ft occasionally to 14 ft.
.SUNDAY...Northwest gales to 35 kt. Chance of snow. Waves 8 to
11 ft occasionally to 14 ft subsiding to 7 to 10 ft occasionally
to 13 ft.
.MONDAY...Northwest winds 10 to 20 kt. Waves 3 to 5 ft subsiding
to 1 to 3 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-130415-
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-
300 PM CST Wed Nov 12 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TONIGHT...Northwest winds to 30 kt diminishing to 15 to 25 kt.
Waves 6 to 9 ft occasionally to 12 ft.
.THURSDAY...Northwest winds 10 to 20 kt becoming west. Waves 4 to
7 ft occasionally to 9 ft subsiding to 3 to 5 ft.
.THURSDAY NIGHT...Southwest winds 10 to 20 kt diminishing to
10 to 15 kt late in the evening, then diminishing to 5 to 10 kt
after midnight becoming south late. Waves 2 to 4 ft.
.FRIDAY...South winds 10 to 15 kt. Waves 1 to 3 ft.
.FRIDAY NIGHT...South winds 10 to 20 kt. Waves 2 to 4 ft building
to 4 to 6 ft occasionally to 8 ft.
.SATURDAY...South winds 15 to 25 kt becoming southwest to 30 kt.
Chance of rain in the afternoon. Waves 5 to 8 ft occasionally to
10 ft.
.SATURDAY NIGHT...Northwest winds to 30 kt increasing to gales to
35 kt. Waves 8 to 12 ft occasionally to 16 ft building to 12 to
16 ft occasionally to 21 ft.
.SUNDAY...Northwest gales to 35 kt. Waves 12 to 16 ft
occasionally to 21 ft.
.MONDAY...Northwest winds 10 to 20 kt diminishing to 10 to 15 kt.
Waves 4 to 7 ft occasionally to 9 ft subsiding to 3 to 5 ft.

$$

LMZ761-130415-
MAFOR 1223/
MICHIGAN NORTH 14740 11730 13630. A chance of rain early this
evening. Waves 4 to 7 feet subsiding to 3 to 6 feet tonight.
Waves 3 to 5 feet subsiding to 2 to 4 feet Thursday.

MICHIGAN SOUTH 11640 12740 12730 11720 12620. Waves 5 to 9 feet
subsiding to 4 to 7 feet tonight. Waves 3 to 6 feet subsiding to
1 to 3 feet Thursday.

$$


Kuroski

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

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