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National Weather Service Marine Forecast FZUS63 KMKX

FZUS63 KMKX 181359
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
859 AM CDT Fri Sep 18 2020

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

Breezy north to northeast winds are expected into today, with
elevated waves over the southern portions of the lake. High
pressure of 30.4 inches will slowly move from northern Minnesota
to northern Lake Michigan today and tonight. The high will then
move across southeast Canada through the weekend, with modest
south to southeast winds developing over Lake Michigan Saturday
into Saturday night.

Gusty south to southeast winds are then forecast Sunday into
Sunday night, becoming south to southwest into early next week.
Waves should build during this period over the northern and
central portions of the lake.

&&

LMZ261-362-364-366-563-565-567-868-182115-
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-
859 AM CDT Fri Sep 18 2020

SHEBOYGAN WI TO PENTWATER MI NORTH...

REST OF TODAY
Northeast winds 10 to 20 kt becoming northwest.
Waves 3 to 5 ft subsiding to 1 to 3 ft.

TONIGHT
North winds 10 to 20 kt becoming east 10 to 15 kt late
in the evening, then becoming southeast after midnight becoming
south late. Waves 1 to 3 ft subsiding to 1 to 2 ft.

SATURDAY
South winds 10 to 15 kt becoming southwest 10 to
20 kt. Waves 2 to 4 ft.

SATURDAY NIGHT
South winds 10 to 20 kt. Waves 3 to 5 ft.

SUNDAY
South winds 15 to 25 kt increasing to 30 kt. Waves 4 to
7 ft occasionally to 9 ft.

SUNDAY NIGHT
South winds to 30 kt. Waves 6 to 9 ft
occasionally to 12 ft.

MONDAY
South winds to 30 kt. Waves 6 to 9 ft occasionally to
12 ft.

TUESDAY
Southwest winds 15 to 25 kt. Waves 4 to 7 ft
occasionally to 9 ft subsiding to 4 to 6 ft occasionally to 8 ft.



LMZ080-669-671-673-675-777-779-870-872-874-876-878-182115-
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-
859 AM CDT Fri Sep 18 2020

SHEBOYGAN WI TO PENTWATER MI SOUTH...

REST OF TODAY
Northeast winds 10 to 20 kt becoming north.
Waves 4 to 6 ft occasionally to 8 ft.

TONIGHT
Northeast winds 10 to 20 kt veering to east 10 to
15 kt. Waves 3 to 5 ft subsiding to 2 to 4 ft.

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

SATURDAY NIGHT
Southeast winds 10 to 15 kt increasing to 10 to
20 kt. Waves 2 to 4 ft.

SUNDAY
Southeast winds 10 to 20 kt becoming south 15 to 25 kt.
Waves 3 to 5 ft building to 4 to 6 ft occasionally to 8 ft.

SUNDAY NIGHT
South winds to 30 kt. Waves 4 to 6 ft
occasionally to 8 ft building to 4 to 7 ft occasionally to 9 ft.

MONDAY
South winds 15 to 25 kt. Waves 4 to 7 ft occasionally
to 9 ft.

TUESDAY
Southwest winds 10 to 20 kt. Waves 3 to 5 ft. 



LMZ761-182115-
MAFOR 1815/
MICHIGAN NORTH 13820 11110 11210 11300 12410. Waves 2 to 4 feet
subsiding to 1 to 3 feet this afternoon. Waves 1 to 3 feet
subsiding to 1 foot or less tonight. Waves 2 feet or less
Saturday morning.

MICHIGAN SOUTH 11120 12820 11120 11110 11210 12310. Waves 3 to 5
feet this afternoon. Waves 2 to 4 feet subsiding to 1 to 3 feet
tonight. Waves 1 to 3 feet Saturday 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