Great Lakes Forecast
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000
FZUS63 KLOT 201351
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
851 AM CDT Fri Apr 20 2018

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 30.6 inches will spread over the
lake this afternoon and drift east from there by the end of the
weekend, gradually weakening as it does. The high will move east
on Monday. Low pressure is expected to develop south of the lake
and move east sometime Tuesday night into Wednesday.

LMZ261-362-364-366-563-565-567-868-202130-
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-
851 AM CDT Fri Apr 20 2018

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TODAY...West winds 5 to 10 kt becoming southwest. Waves
1 to 2 ft.
.TONIGHT...Southwest winds 10 to 15 kt. Waves 1 to 2 ft.
.SATURDAY...Southwest winds 5 to 10 kt. Waves 1 to 2 ft.
.SATURDAY NIGHT...South winds less than 10 kt. Waves around 1 ft.
.SUNDAY...Southeast winds less than 10 kt becoming east. Waves
1 ft or less.
.SUNDAY NIGHT...East winds 5 to 10 kt becoming southeast. Waves
1 ft or less.
.MONDAY...South winds 5 to 10 kt becoming southwest. Waves 1 ft
or less.
.TUESDAY...Southwest winds 5 to 10 kt increasing to 10 to 15 kt.
Waves 1 to 3 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-202130-
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-
851 AM CDT Fri Apr 20 2018

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TODAY...West winds 5 to 10 kt becoming variable in the
early afternoon. Waves 1 to 3 ft.
.TONIGHT...East winds 5 to 10 kt. Waves around 1 ft.
.SATURDAY...East winds less than 10 kt becoming northeast. Waves
around 1 ft.
.SATURDAY NIGHT...East winds 5 to 10 kt. Waves 1 ft or less.
.SUNDAY...East winds 5 to 10 kt becoming northeast 10 to 15 kt.
Waves 1 to 3 ft.
.SUNDAY NIGHT...Northeast winds 10 to 15 kt becoming east. Waves
1 to 3 ft.
.MONDAY...East winds 10 to 15 kt becoming northeast. Waves 1 to
3 ft.
.TUESDAY...South winds 5 to 10 kt becoming southeast. Waves 1 to 2
ft.

$$
LMZ761-202130-
MAFOR 2015/

MICHIGAN NORTH 11600 11500 14510 11510 11400. Waves 1 to 2 ft.

MICHIGAN SOUTH 11600 12900 14200 11300. Waves 1 to 3 ft
diminishing to around 1 ft this 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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