Great Lakes Forecast
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000
FZUS63 KLOT 190148
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
848 PM CDT Fri Aug 18 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 29.5 inches moving into southern
Quebec will lift east of James Bay Saturday and continue across
northern Quebec Sunday. A ridge averaging 30.0 inches stretches
along the Mississippi Valley will spread across much of the
Midwest Saturday. Low pressure of 29.8 inches will form over the
central Great Plains this weekend and remain there through Tuesday
while another low of 29.5 inches moves from northern Manitoba
Saturday to Quebec Tuesday as a trailing cold front sweeps south
across Lake Michigan.

LMZ261-362-364-366-563-565-567-868-190930-
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-
848 PM CDT Fri Aug 18 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TONIGHT...Northwest winds 15 to 25 kt becoming west 10
to 15 kt. Waves 3 to 5 ft subsiding to 2 to 4 ft.
.SATURDAY...West winds 10 to 15 kt becoming southwest early in
the afternoon increasing to 10 to 20 kt late. Waves 1 to 3 ft.
.SATURDAY NIGHT...Southwest winds 10 to 20 kt. Waves 2 to 4 ft.
.SUNDAY...Southwest winds 10 to 20 kt increasing to 15 to 25 kt.
Waves 2 to 4 ft.
.SUNDAY NIGHT...Southwest winds 15 to 25 kt diminishing to 10 to
20 kt. Chance of showers and thunderstorms overnight. Waves 2 to
4 ft.
.MONDAY...Southwest winds 10 to 20 kt. Chance of showers and
thunderstorms. Waves 2 to 4 ft.
.MONDAY NIGHT...Southwest winds 10 to 20 kt. Chance of showers
and thunderstorms. Waves 2 to 4 ft.
.TUESDAY...West winds 10 to 20 kt becoming northwest 15 to 25 kt.
Showers and thunderstorms likely. Waves 2 to 4 ft building to
3 to 5 ft.
.WEDNESDAY...Northwest winds 15 to 25 kt diminishing to 10 to
20 kt. Waves 3 to 5 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-190930-
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-
848 PM CDT Fri Aug 18 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TONIGHT...West winds 10 to 15 kt becoming northwest.
Chance of showers and slight chance of thunderstorms overnight.
Waves 2 to 4 ft subsiding to 1 to 3 ft.
.SATURDAY...Northwest winds 10 to 15 kt becoming variable 5 to 10
kt. Waves 1 to 3 ft.
.SATURDAY NIGHT...South winds 10 to 15 kt becoming southwest.
Waves 1 to 2 ft.
.SUNDAY...Southwest winds 10 to 15 kt becoming south 10 to 20 kt.
Waves 1 to 3 ft.
.SUNDAY NIGHT...South winds 10 to 20 kt becoming southwest. Waves
2 to 4 ft.
.MONDAY...South winds 10 to 20 kt. Chance of showers and
thunderstorms. Waves 2 to 4 ft.
.MONDAY NIGHT...South winds 10 to 20 kt becoming southwest 15 to
25 kt. Chance of showers and thunderstorms. Waves 2 to 4 ft.
.TUESDAY...Southwest winds 10 to 20 kt becoming west 15 to 25 kt.
Showers and thunderstorms likely. Waves 3 to 5 ft.
.WEDNESDAY...Northwest winds 15 to 25 kt diminishing to 10 to
20 kt. Waves 3 to 5 ft.

$$
LMZ761-190930-
MAFOR 1903/
MICHIGAN NORTH 11730 11620 13610 11510 12520. Waves 3 to 5 ft
subsiding to 2 to 4 ft tonight and to 1 to 3 ft Saturday.

MICHIGAN SOUTH 11610 14710 12900 11410. Waves 2 to 4 ft subsiding
to 1 to 3 ft tonight and continuing 2 to 3 ft Saturday.

$$

- Izzi

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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