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National Weather Service Marine Forecast FZUS63 KMKX

FZUS63 KMKX 120751
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
251 AM CDT Wed May 12 2021

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 30.4 inches will very slowly push southeast
across WI and Lake Michigan through Friday. Expect light and
variable winds across the Lake today and through the rest of the
week, but may be breezy across northern portions at times.

&&

LMZ261-362-364-366-563-565-567-868-121530-
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-
251 AM CDT Wed May 12 2021

SHEBOYGAN WI TO PENTWATER MI NORTH...

TODAY
West winds 5 to 10 kt becoming southwest 10 to 20 kt.
Waves 1 to 3 ft.

TONIGHT
Southwest winds 10 to 20 kt diminishing to 5 to 10 kt.
Waves 1 to 2 ft.

THURSDAY
Southwest winds 5 to 10 kt increasing to 10 to 15 kt.
Waves 1 to 3 ft.

THURSDAY NIGHT
Southwest winds 10 to 15 kt diminishing to 5 to
10 kt. Waves 1 to 3 ft.

FRIDAY
Southwest winds 5 to 10 kt increasing to 10 to 15 kt.
Waves 1 to 2 ft.

FRIDAY NIGHT
Southwest winds 10 to 15 kt becoming south 5 to
10 kt. Waves 1 to 2 ft.

SATURDAY
South winds 5 to 10 kt becoming southwest. Waves 1 to
2 ft.

SUNDAY
Southeast winds 10 to 15 kt becoming south. Waves 1 to
2 ft. 



LMZ080-669-671-673-675-777-779-870-872-874-876-878-121530-
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-
251 AM CDT Wed May 12 2021

SHEBOYGAN WI TO PENTWATER MI SOUTH...

TODAY
North winds 5 to 10 kt backing to west. Waves 1 to 2 ft.

TONIGHT
Northwest winds 5 to 10 kt becoming west. Waves 1 ft
or less.

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

THURSDAY NIGHT
South winds 10 to 15 kt diminishing to 5 to
10 kt. Waves 1 to 2 ft.

FRIDAY
South winds 5 to 10 kt. Waves 1 ft or less.

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

SATURDAY
Southeast winds 5 to 10 kt becoming south. Waves 1 to
2 ft.

SUNDAY
Southeast winds 10 to 15 kt. Waves 1 to 2 ft. 



LMZ761-121530-
MAFOR 1209/
MICHIGAN NORTH 12600 11510 12520 11510 12500. Waves 2 feet or
less.

MICHIGAN SOUTH 11700 11800 11100 12610 11700 12600. Waves 1 foot
or less.



Wagner

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

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