Great Lakes Forecast
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FZUS63 KLOT 120133
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
833 PM CDT Fri Aug 11 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...Low pressure of 29.9 inches over Lake Huron will move
east into Quebec Saturday. High pressure of 30.1 inches over the
northern plains will build across the Middle and Upper Mississippi
Valley and into the Upper Midwest over the weekend, and across
the southern Great Lakes region early next week.

LMZ261-362-364-366-563-565-120930-
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-
833 PM CDT Fri Aug 11 2017

TWO RIVERS WI TO MANISTEE MI NORTH...

.REST OF TONIGHT...Northwest winds 15 to 25 kt becoming north.
Slight chance of showers this evening. Waves 4 to 6 ft
occasionally to 8 ft.
.SATURDAY...North winds 15 to 25 kt becoming northwest 10 to
20 kt. Waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to
4 ft.
.SATURDAY NIGHT...Northwest winds 10 to 15 kt diminishing to 5 to
10 kt. Waves 1 to 3 ft subsiding to 1 ft or less.
.SUNDAY...West winds 10 to 15 kt becoming southwest. Waves 1 to
2 ft.
.SUNDAY NIGHT...Southwest winds 10 to 15 kt diminishing to 5 to
10 kt. Waves 1 to 2 ft.
.MONDAY...Southwest winds 5 to 10 kt increasing to 10 to 15 kt.
Waves 1 to 2 ft.
.MONDAY NIGHT...Southwest winds 5 to 10 kt becoming west. Waves
1 ft or less.
.TUESDAY...West winds 5 to 10 kt becoming southwest 10 to 15 kt.
Waves 1 ft or less.
.WEDNESDAY...South winds 5 to 10 kt becoming southeast 10 to
15 kt. Waves 1 to 2 ft.

$$

LMZ080-567-669-671-673-675-777-779-868-870-872-874-876-878-120930-
Lake Michigan from Michigan City IN to St. Joseph MI 5 NM
offshore to Mid Lake-
Lake Michigan from Two Rivers to Sheboygan WI 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 Pentwater to Manistee MI 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-
833 PM CDT Fri Aug 11 2017

TWO RIVERS WI TO MANISTEE MI SOUTH...

.REST OF TONIGHT...North winds 10 to 20 kt increasing to 15 to 25
kt. Waves 3 to 5 ft building to 4 to 6 ft occasionally to 8 ft.
.SATURDAY...North winds 15 to 25 kt diminishing to 10 to 20 kt.
Waves 4 to 6 ft occasionally to 8 ft.
.SATURDAY NIGHT...North winds 10 to 20 kt diminishing to 5 to
10 kt. Waves 3 to 5 ft subsiding to 2 to 4 ft.
.SUNDAY...East winds 5 to 10 kt veering to south. Waves 1 to
3 ft.
.SUNDAY NIGHT...East winds 10 to 15 kt diminishing to 5 to 10 kt.
Waves nearly calm.
.MONDAY...East winds 5 to 10 kt backing to north. Waves nearly
calm.
.MONDAY NIGHT...North winds 5 to 10 kt. Waves 1 ft or less.
.TUESDAY...Northeast winds 5 to 10 kt. Waves 1 ft or less.
.WEDNESDAY...Southeast winds 10 to 15 kt. Waves 1 to 2 ft.

$$
LMZ761-120930-
MAFOR 1203/
MICHIGAN NORTH 11730 11830 12830 12820 11720 11710. Waves 4 to 6
feet occasionally to 8 feet overnight and Saturday. Waves 2 to 4
feet Saturday evening.

MICHIGAN SOUTH 12820 15830. Waves 3 to 5 feet building to 4 to 6
feet occasionally to 8 feet overnight. Waves 4 to 6 feet
occasionally to 8 feet Saturday. Waves subsiding to 3 to 5 feet
Saturday evening.

$$

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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