Great Lakes Forecast
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FZUS63 KLOT 130748
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
248 AM CDT Wed Sep 13 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 ridge of high pressure averaging 29.9 inches
stretches across the Great Lakes and New England early this
morning. Low pressure of 29.7 inches over the Tennessee Valley
will meander across the mid Mississippi Valley today while
weakening. Another low of 29.6 inches will take shape over the
central Great Plains and persist over the region through the end
of the week. The low will lift across Lake Superior Sunday, with a
trailing cold front then to move across Lake Michigan Sunday
night.

LMZ261-362-364-366-563-565-567-868-131515-
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-
248 AM CDT Wed Sep 13 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TODAY...South winds 5 to 10 kt becoming variable. Waves 1 ft or
less.
.TONIGHT...South winds 5 to 10 kt becoming southwest. Waves 1 ft
or less.
.THURSDAY...South winds 10 to 20 kt. Waves 2 to 4 ft.
.THURSDAY NIGHT...South winds 10 to 20 kt. Waves 2 to 4 ft.
.FRIDAY...South winds 15 to 25 kt. Waves 3 to 5 ft.
.FRIDAY NIGHT...South winds 10 to 20 kt. Waves 3 to 5 ft.
.SATURDAY...South winds 15 to 25 kt. Waves 4 to 6 ft occasionally
to 8 ft.
.SUNDAY...Southwest winds 15 to 25 kt diminishing to 10 to 20 kt.
Chance of showers and thunderstorms. Waves 3 to 5 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-131515-
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-
248 AM CDT Wed Sep 13 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TODAY...East winds 10 to 15 kt. Slight chance of showers this
morning. Waves 1 to 2 ft.
.TONIGHT...Southeast winds 5 to 10 kt veering to southwest. Waves
1 ft or less.
.THURSDAY...South winds 10 to 20 kt. Waves 1 to 3 ft.
.THURSDAY NIGHT...South winds 10 to 20 kt. Waves 1 to 3 ft.
.FRIDAY...South winds 10 to 20 kt. Waves 2 to 4 ft.
.FRIDAY NIGHT...South winds 10 to 20 kt. Waves 2 to 4 ft.
.SATURDAY...South winds 15 to 25 kt. Waves 3 to 5 ft.
.SUNDAY...Southwest winds 10 to 20 kt. Chance of showers and
thunderstorms. Waves 3 to 5 ft.

$$

LMZ761-131515-
MAFOR 1309/
MICHIGAN NORTH 12400 13900 12400 11500. Waves 1 foot or less.

MICHIGAN SOUTH 13210 11200 12300 11400 11500. Waves 1 to 2 ft.

$$

KMD

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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