626
FZUS63 KMKX 191424
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
924 AM CDT Sat Sep 19 2026

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...

Low pressure around 29.8 inches will move east northeast toward
far southern Lake Michigan today, then just south of the southern
portions of the lake tonight. Winds will become southeast and
gusty ahead of the low, then shift northeast tonight as the low
passes to the south. Areas of widespread showers and thunderstorms
will accompany the passing area of low pressure today into
tonight.

Gusty east to northeast winds are then expected Sunday through
Monday night, as low pressure slowly moves into the Ohio River
Valley. High pressure around 30.5 inches will move southeast into
Ontario during this period. Gusts could occasionally approach
gale force Sunday into Monday night, mainly over southern portions
of the lake. Winds will steadily taper Tuesday through Wednesday,
as the high pressure system moves into Quebec and New England.

LMZ261-362-364-366-563-565-567-868-192115-
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-
924 AM CDT Sat Sep 19 2026

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TODAY...Southeast winds 15 to 25 kt becoming east 10 to
20 kt. Chance of showers. Waves 4 to 7 ft occasionally to 9 ft.
.TONIGHT...East winds 10 to 20 kt becoming northeast 15 to 25 kt.
Chance of showers in the evening, then slight chance of showers
overnight. Waves 3 to 5 ft subsiding to 2 to 4 ft.
.SUNDAY...Northeast winds 15 to 25 kt increasing to 30 kt. Waves
4 to 6 ft occasionally to 8 ft building to 6 to 9 ft occasionally
to 12 ft.
.SUNDAY NIGHT...Northeast winds to 30 kt diminishing to 15 to
25 kt. Waves 7 to 10 ft occasionally to 13 ft.
.MONDAY...East winds 15 to 25 kt becoming northeast to 30 kt.
Waves 4 to 6 ft occasionally to 8 ft.
.MONDAY NIGHT...East winds to 30 kt diminishing to 15 to 25 kt.
Waves 4 to 6 ft occasionally to 8 ft.
.TUESDAY...East winds 15 to 25 kt becoming northeast to 30 kt.
Waves 4 to 6 ft occasionally to 8 ft.
.WEDNESDAY...East winds 15 to 25 kt becoming northeast. Waves
3 to 5 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-192115-
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-
924 AM CDT Sat Sep 19 2026

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TODAY...Southeast winds to 30 kt diminishing to 10 to
20 kt. Chance of showers and slight chance of thunderstorms.
Waves 5 to 8 ft occasionally to 10 ft subsiding to 4 to 7 ft
occasionally to 9 ft.
.TONIGHT...Southeast winds 10 to 20 kt backing to northeast 15 to
25 kt. Showers likely with a chance of thunderstorms in the
evening, then showers with a chance of thunderstorms overnight.
Waves 3 to 5 ft.
.SUNDAY...Northeast winds to 30 kt increasing to gales to 35 kt.
Chance of showers. Waves 4 to 7 ft occasionally to 9 ft building
to 7 to 10 ft occasionally to 13 ft.
.SUNDAY NIGHT...Northeast gales to 35 kt becoming east to 30 kt.
Waves 8 to 11 ft occasionally to 14 ft subsiding to 7 to 10 ft
occasionally to 13 ft.
.MONDAY...East winds to 30 kt becoming northeast gales to 35 kt.
Waves 7 to 10 ft occasionally to 13 ft.
.MONDAY NIGHT...Northeast winds to 30 kt becoming east. Waves
6 to 9 ft occasionally to 12 ft.
.TUESDAY...Northeast winds to 30 kt. Waves 7 to 10 ft
occasionally to 13 ft.
.WEDNESDAY...Northeast winds 15 to 25 kt. Waves 4 to 7 ft
occasionally to 9 ft.

$$

LMZ761-192115-
MAFOR 1916/
MICHIGAN NORTH 11330 12220 12210 11120 11130 11140. A chance of
showers this afternoon and evening. Waves 3 to 6 feet this
afternoon. Waves 2 to 4 feet tonight. Waves 3 to 6 feet building
to 4 to 7 feet Sunday morning.

MICHIGAN SOUTH 11330 12326 11316 11226 11126 11136 11140. A
chance of thunderstorms tonight. Waves 4 to 7 feet subsiding to 3
to 6 feet this afternoon. Waves 3 to 5 feet subsiding to 2 to 4
feet tonight. Waves 3 to 6 feet building to 4 to 7 feet Sunday
morning.

$$


Kuroski

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

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