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Hurricane Symbol Storm Special! View the latest observations near Atlantic Tropical Storm Chantal.

National Weather Service Marine Forecast FZUS63 KMKX

FZUS63 KMKX 210754
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
254 AM CDT Wed Aug 21 2019

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 of 29.8 will move across Ontario early this morning
and drag a cold front across the lake tonight into early Wednesday
Wednesday morning. North wind gusts of 15 to 20 knots are
expected on Wednesday behind the front. There will be a brief lull
in winds Wednesday evening. Then Canadian high pressure of 30.2
inches will move across Ontario bringing another weak front across
the lake. North winds will increase somewhat on Thursday. As the
high shifts east, northeast winds are expected Thursday night and
Friday.

LMZ261-362-364-366-563-565-567-868-211515-
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-
254 AM CDT Wed Aug 21 2019

SHEBOYGAN WI TO PENTWATER MI NORTH...

TODAY
North winds 10 to 15 kt increasing to 15 to 25 kt. Waves
2 to 4 ft.

TONIGHT
North winds 15 to 25 kt diminishing to 10 to 15 kt.
Waves 2 to 4 ft subsiding to 1 to 2 ft.

THURSDAY
North winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 1 to 3 ft.

THURSDAY NIGHT
Northeast winds 10 to 20 kt diminishing to
10 to 15 kt. Waves 1 to 3 ft.

FRIDAY
Northeast winds 10 to 15 kt. Waves 1 to 2 ft.

FRIDAY NIGHT
Northeast winds 10 to 20 kt becoming east 5 to
10 kt. Waves 1 to 2 ft.

SATURDAY
Southeast winds 5 to 10 kt becoming east 10 to 15 kt.
Waves 1 to 2 ft.

SUNDAY
South winds 10 to 20 kt. Waves 2 to 4 ft. 



LMZ080-669-671-673-675-777-779-870-872-874-876-878-211515-
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-
254 AM CDT Wed Aug 21 2019

SHEBOYGAN WI TO PENTWATER MI SOUTH...

TODAY
West winds 10 to 15 kt becoming north 10 to 20 kt. Waves
1 to 3 ft building to 3 to 5 ft.

TONIGHT
North winds 10 to 20 kt becoming northeast 10 to
15 kt. Waves 2 to 4 ft subsiding to 1 to 3 ft.

THURSDAY
East winds 10 to 15 kt becoming northeast 10 to
20 kt. Waves 1 to 3 ft.

THURSDAY NIGHT
Northeast winds 10 to 20 kt diminishing to
10 to 15 kt. Waves 2 to 4 ft.

FRIDAY
Northeast winds 10 to 20 kt. Waves 2 to 4 ft.

FRIDAY NIGHT
Northeast winds 10 to 20 kt becoming east 10 to
15 kt. Waves 2 to 4 ft.

SATURDAY
Southeast winds 10 to 15 kt. Waves 1 to 3 ft.

SUNDAY
Southeast winds 10 to 20 kt. Waves 2 to 4 ft. 



LMZ761-211515-
MAFOR 2109/
MICHIGAN NORTH 11710 11810 11820 11720 12830 11820 11810. Waves 2
to 4 ft.

MICHIGAN SOUTH 12610 11720 11830 12820 11810 11110. Waves 2 to 4
ft building to 3 to 5 ft today. Waves 2 to 4 ft tonight.



Marquardt

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

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