Great Lakes Forecast
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000
FZUS63 KLOT 130142
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
842 PM CDT Sat Aug 12 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...High pressure of 30.1 inches over the upper
Mississippi Valley will slowly spread east across the Great Lakes
tonight and Sunday. A ridge of high pressure will linger across
Great Lakes through Monday night. Low pressure of 29.5 inches is
expected to move out of the central Rockies and into the western
plains Tuesday and then move east across the Plains Wednesday and
reaches western Lake Superior by Wednesday night. The low will
then lift northeast into southwestern Ontario Thursday evening as
an associated cold front sweeps across Lake Michigan.

LMZ261-362-364-366-563-565-130800-
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-
842 PM CDT Sat Aug 12 2017

TWO RIVERS WI TO MANISTEE MI NORTH...

.REST OF TONIGHT...West winds 10 to 15 kt. Waves 1 to 2 ft.
.SUNDAY...West winds 10 to 15 kt becoming southwest. Waves 1 to
2 ft.
.SUNDAY NIGHT...Southwest winds 10 to 15 kt becoming south 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...Southeast winds 10 to 15 kt becoming east. Waves
1 to 2 ft.
.TUESDAY...Southeast winds 10 to 15 kt becoming east. Waves 1 to
2 ft.
.TUESDAY NIGHT...East winds 10 to 15 kt increasing to 10 to 20
kt. Waves 1 to 3 ft.
.WEDNESDAY...Southeast winds 10 to 20 kt. Chance of showers.
Waves 2 to 4 ft.
.THURSDAY...West winds 10 to 20 kt becoming northwest. Waves 2 to
4 ft subsiding to 1 to 3 ft.

$$

LMZ080-567-669-671-673-675-777-779-868-870-872-874-876-878-130800-
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-
842 PM CDT Sat Aug 12 2017

TWO RIVERS WI TO MANISTEE MI SOUTH...

.REST OF TONIGHT...North winds 10 to 15 kt diminishing to 5 to
10 kt. Waves 3 to 5 ft subsiding to 1 to 3 ft.
.SUNDAY...Southeast winds 5 to 10 kt becoming southwest. Waves
1 to 3 ft.
.SUNDAY NIGHT...Southeast winds 10 to 15 kt becoming south. Waves
1 ft or less.
.MONDAY...South winds 5 to 10 kt increasing to 10 to 15 kt. Waves
1 to 2 ft.
.MONDAY NIGHT...Southeast winds 10 to 15 kt. Waves 1 to 2 ft.
.TUESDAY...Southeast winds 10 to 15 kt. Waves 1 to 2 ft.
.TUESDAY NIGHT...East winds 10 to 15 kt becoming southeast 10 to
20 kt. Waves 1 to 3 ft.
.WEDNESDAY...South winds 10 to 20 kt. Chance of showers. Waves
2 to 4 ft.
.THURSDAY...West winds 10 to 20 kt. Chance of showers. Waves 2 to
4 ft.

$$
LMZ761-130800-
MAFOR 1303/
MICHIGAN NORTH 13610 11510 14510. Waves 1 to 2 ft.

MICHIGAN SOUTH 12810 11800 11200 11300 12400 11310. Waves 3 to
5 ft subsiding to 1 to 3 ft overnight. Waves 1 to 3 ft Sunday.

$$

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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