Great Lakes Forecast
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FZUS63 KLOT 181335
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
835 AM CDT Fri May 18 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 30.5 inches over Quebec will shift
over to New England today while a trough develops across the
central and northern Plains. This trough will then develop into
the western Great Lakes and Ontario tonight while low pressure of
29.8 inches track just south of the lake tonight into Saturday. A
weak trough of low pressure averaging 29.9 inches will then be
situated from the central Plains and Mid Mississippi Valley, to
the Ohio Valley Saturday into early next week, while high pressure
of 30.2 inches builds across the western and central Great Lakes.

LMZ261-362-364-366-563-565-567-868-182130-
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-
835 AM CDT Fri May 18 2018

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TODAY...East winds 15 to 25 kt becoming northeast. Waves
3 to 5 ft.
.TONIGHT...East winds 15 to 25 kt diminishing to 10 to 15 kt.
Chance of rain showers south overnight. Waves subsiding to 2 to 4
ft.
.SATURDAY...Northeast winds 10 to 15 kt becoming north 5 to
10 kt. Chance of rain showers in the morning. Waves 1 to 3 ft.
.SATURDAY NIGHT...North winds 10 to 20 kt. Waves 3 to 5 ft.
.SUNDAY...North winds 10 to 20 kt diminishing to 10 to 15 kt.
Waves 3 to 5 ft.
.SUNDAY NIGHT...North winds 10 to 15 kt becoming northeast. Waves
1 to 3 ft.
.MONDAY...Northeast winds 10 to 20 kt. Chance of rain showers.
Waves 1 to 3 ft.
.TUESDAY...Southeast winds 10 to 15 kt. Waves 1 to 3 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-182130-
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-
835 AM CDT Fri May 18 2018

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TODAY...Northeast winds 15 to 25 kt diminishing to 10 to
20 kt. Slight chance of showers late this afternoon. Waves 3 to 5
ft subsiding to 2 to 4 ft.
.TONIGHT...East winds 10 to 20 kt becoming northeast. Showers
likely. Waves 3 to 5 ft.
.SATURDAY...Northeast winds 10 to 15 kt becoming north 5 to
10 kt. Chance of showers in the morning. Waves 2 to 4 ft
subsiding to 1 to 2 ft.
.SATURDAY NIGHT...North winds 10 to 20 kt. Waves 3 to 5 ft.
.SUNDAY...North winds 10 to 20 kt diminishing to 10 to 15 kt.
Chance of rain showers in the afternoon. Waves 3 to 5 ft.
.SUNDAY NIGHT...Northeast winds 10 to 15 kt. Chance of rain
showers and thunderstorms. Waves 2 to 4 ft.
.MONDAY...East winds 10 to 20 kt. Chance of showers. Waves 2 to
4 ft.
.TUESDAY...South winds 10 to 20 kt becoming west. Waves 1 to
3 ft.

$$
LMZ761-182130-
MAFOR 1815/
MICHIGAN NORTH 13130 11230 12220 11210 11110. Chance of showers
late this evening. Chance of showers Saturday morning. Waves 3 to
5 ft this afternoon. Waves 3 to 5 ft subsiding to 2 to 4 ft
tonight. Waves 1 to 3 ft Saturday morning.

MICHIGAN SOUTH 13120 11220 12226 11126 11110. Chance of showers
late tonight. Chance of showers Saturday morning. Waves 3 to 5 ft
subsiding to 2 to 4 ft this afternoon. Waves 3 to 5 ft tonight.
Waves 2 to 4 ft Saturday morning.

$$

Kluber

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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