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NDBC is adding additional data to its .drift file format on or about August 17. For more info, see the Drift File Format Change Notice.

National Weather Service Marine Forecast FZUS63 KMKX

FZUS63 KMKX 111354
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
854 AM CDT Thu Aug 11 2022

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 around 30.3 inches over southwest Ontario will
slowly sink south over the Great Lakes this afternoon through
Friday. Breezy north to northeast winds are expected into tonight.

Low pressure around 29.8 inches over Minnesota and Iowa should
then move east across the southern Great Lakes region this
weekend. There is some uncertainty in where the surface low will
track, and how strong it may be, so there is some uncertainty in
how strong southerly winds will get ahead of the surface low on
Saturday.

LMZ261-362-364-366-563-565-567-868-112130-
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-
854 AM CDT Thu Aug 11 2022

SHEBOYGAN WI TO PENTWATER MI NORTH...

REST OF TODAY
North winds 10 to 20 kt increasing to 15 to
25 kt. Waves 4 to 6 ft occasionally to 8 ft.

TONIGHT
North winds 10 to 20 kt becoming northeast 10 to
15 kt. Waves 3 to 5 ft subsiding to 1 to 3 ft.

FRIDAY
Northeast winds 5 to 10 kt backing to west. Waves 1 to
3 ft subsiding to 1 ft or less.

FRIDAY NIGHT
Southwest winds 5 to 10 kt becoming south. Waves
1 to 2 ft.

SATURDAY
South winds 10 to 20 kt increasing to 15 to 25 kt.
Chance of showers. Waves 2 to 4 ft building to 3 to 5 ft.

SATURDAY NIGHT
Southeast winds 10 to 20 kt becoming east.
Chance of showers. Waves 3 to 5 ft.

SUNDAY
Northeast winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 1 to 3 ft.

MONDAY
Northeast winds 5 to 10 kt increasing to 10 to 15 kt.
Waves 1 to 3 ft. 



LMZ080-669-671-673-675-777-779-870-872-874-876-878-112130-
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-
854 AM CDT Thu Aug 11 2022

SHEBOYGAN WI TO PENTWATER MI SOUTH...

REST OF TODAY
Northeast winds 10 to 20 kt becoming north 15 to
25 kt. Waves 3 to 5 ft building to 4 to 6 ft occasionally to
8 ft.

TONIGHT
North winds 15 to 25 kt becoming northeast 10 to
20 kt. Waves 4 to 7 ft occasionally to 9 ft subsiding to 4 to
6 ft occasionally to 8 ft.

FRIDAY
East winds 10 to 15 kt becoming north. Waves 3 to 5 ft
subsiding to 1 to 2 ft.

FRIDAY NIGHT
East winds 5 to 10 kt becoming south. Waves 1 to
2 ft.

SATURDAY
South winds 15 to 25 kt. Chance of showers. Waves
3 to 5 ft.

SATURDAY NIGHT
Southeast winds 10 to 20 kt becoming south.
Chance of showers. Waves 3 to 5 ft subsiding to 2 to 4 ft.

SUNDAY
Northeast winds 10 to 20 kt becoming north. Waves 1 to
3 ft.

MONDAY
Northeast winds 10 to 15 kt becoming north 10 to 20 kt.
Waves 1 to 3 ft. 



LMZ761-112130-
MAFOR 1116/
MICHIGAN NORTH 11820 11830 12820 11120 12110 11100. Waves 3 to 5
ft building to 4 to 6 ft occasionally to 8 ft this afternoon.
Waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to 4 ft
tonight. Waves 1 to 3 ft Friday morning.

MICHIGAN SOUTH 11820 12830 11130 12120 11220 11210. Waves 3 to 5
ft building to 4 to 7 ft occasionally to 9 ft this afternoon.
Waves 4 to 7 ft occasionally to 9 ft tonight. Waves 3 to 5 ft
subsiding to 2 to 4 ft Friday morning.


Wood

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

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