Great Lakes Forecast
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FZUS63 KLOT 271946
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
246 PM CDT Thu Jul 27 2017

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...A trough of low pressure averaging 29.9 inches over the
lower Great Lakes will move to the central Ohio River Valley
tonight, and onward to the Mid- Atlantic on Friday while deepening
slightly as it does. High pressure of 30.2 inches will build
southward from Ontario on Friday, centering over Lake Michigan on
Saturday. This high will move very slowly south through the first
part of next week.

LMZ261-362-364-366-563-565-567-868-280330-
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-
246 PM CDT Thu Jul 27 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TONIGHT...North winds 10 to 15 kt increasing to northeast 15 to
25 kt. Waves 3 to 5 ft.
.FRIDAY...Northeast winds 15 to 25 kt. Waves 3 to 5 ft building
to 4 to 6 ft occasionally to 8 ft late.
.FRIDAY NIGHT...Northeast winds 15 to 25 kt becoming north 10 to
15 kt late. Waves 4 to 6 ft occasionally to 8 ft subsiding to
1 to 3 ft.
.SATURDAY...North winds 10 to 20 kt. Waves 1 to 3 ft.
.SATURDAY NIGHT...North winds 10 to 20 kt becoming northwest 5 to
10 kt overnight. Waves 1 to 3 ft subsiding to 1 to 2 ft
overnight.
.SUNDAY...West winds 5 to 10 kt becoming southwest 10 to 15 kt.
Waves 1 to 2 ft.
.SUNDAY NIGHT...West winds 10 to 15 kt. Waves 1 to 2 ft.
.MONDAY...Southwest winds 10 to 15 kt. Waves 1 ft or less.
.TUESDAY...Southwest winds 10 to 20 kt. Waves 1 to 2 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-280330-
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-
246 PM CDT Thu Jul 27 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TONIGHT...Northeast winds 15 to 25 kt. Waves building to 4 to 6
ft occasionally to 8 ft.
.FRIDAY...North winds 15 to 25 kt. Waves 4 to 7 ft occasionally
to 9 ft.
.FRIDAY NIGHT...Northeast winds 15 to 25 kt. Waves 4 to 7 ft
occasionally to 9 ft.
.SATURDAY...North winds 15 to 25 kt. Waves 3 to 5 ft.
.SATURDAY NIGHT...Northeast winds 10 to 20 kt. Waves 2 to 4 ft.
.SUNDAY...North winds 10 to 15 kt. Waves 1 to 2 ft.
.SUNDAY NIGHT...North winds 10 to 15 kt. Waves 1 to 2 ft.
.MONDAY...North winds 5 to 10 kt. Waves 1 ft or less.
.TUESDAY...Southwest winds 10 to 15 kt. Waves 1 ft or less.

$$

LMZ761-280330-
MAFOR 2721/
MICHIGAN NORTH 11810 11820 12830 14130. Waves 3 to 5 ft
occasionally to 7 ft.

MICHIGAN SOUTH 11830 14130 13830. Waves 4 to 6 ft occasionally to
8 ft tonight. Waves 4 to 7 ft occasionally to 9 ft Friday.

$$



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

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



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