Great Lakes Forecast
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000
FZUS63 KLOT 180137
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
837 PM CDT Thu May 17 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 will shift over
southeastern Canada and the Upper Great Lakes region tonight into
Friday while a trough develops across the central and northern
Plains. The high pressure will retreat to eastern Canada by
Saturday night. A series of weak low pressure systems will cross
the southern Great Lakes Saturday afternoon through Monday. High
pressure of 30.1 inches will then gradually build across the
western Great Lakes beginning Tuesday.

LMZ261-362-364-366-563-565-567-868-180930-
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-
837 PM CDT Thu May 17 2018

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TONIGHT...Northeast winds 15 to 25 kt becoming east
10 to 20 kt. Waves 4 to 7 ft occasionally to 9 ft subsiding to
3 to 5 ft.
.FRIDAY...East winds 15 to 25 kt becoming northeast. Waves 2 to 4
ft building to 3 to 5 ft.
.FRIDAY NIGHT...East winds 10 to 20 kt. Chance of rain showers
overnight. Waves 2 to 4 ft subsiding to 1 to 3 ft.
.SATURDAY...Northeast winds 10 to 15 kt diminishing to 5 to
10 kt. Waves 1 to 2 ft.
.SATURDAY NIGHT...North winds 10 to 20 kt. Waves 1 to 2 ft
building to 1 to 3 ft.
.SUNDAY...North winds 10 to 20 kt diminishing to 10 to 15 kt.
Waves 2 to 4 ft.
.SUNDAY NIGHT...North winds 10 to 20 kt becoming northeast.
Chance of rain showers. Waves 2 to 4 ft.
.MONDAY...Northeast winds 10 to 20 kt. Chance of rain showers.
Waves 2 to 4 ft.
.TUESDAY...Northeast winds 10 to 20 kt becoming north 10 to
15 kt. Waves 1 to 3 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-180930-
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-
837 PM CDT Thu May 17 2018

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TONIGHT...Northeast winds 15 to 25 kt becoming east.
Waves 4 to 7 ft occasionally to 9 ft.
.FRIDAY...Northeast winds 15 to 25 kt diminishing to 10 to 20 kt.
Waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to 4 ft.
.FRIDAY NIGHT...East winds 10 to 20 kt. Chance of showers. Waves
2 to 4 ft.
.SATURDAY...Northeast winds 10 to 15 kt becoming north. Chance of
showers in the morning. Waves 1 to 3 ft subsiding to 1 to 2 ft.
.SATURDAY NIGHT...North winds 5 to 10 kt increasing to 10 to
20 kt overnight. Waves 1 to 2 ft building to 1 to 3 ft.
.SUNDAY...Northeast winds 10 to 20 kt becoming north 10 to 15 kt.
Chance of thunderstorms in the afternoon. Waves 2 to 4 ft.
.SUNDAY NIGHT...Northeast winds 10 to 20 kt becoming east. Chance
of showers. Waves 2 to 4 ft.
.MONDAY...East winds 10 to 20 kt becoming northeast. Chance of
showers. Waves 2 to 4 ft.
.TUESDAY...Northwest winds 10 to 15 kt becoming north. Waves 1 to
3 ft.

$$
LMZ761-180930-
MAFOR 1803/
MICHIGAN NORTH 11130 12220 12230 12130 11220. Waves 4 to 7 ft
occasionally to 9 ft subsiding to 3 to 5 ft overnight. Waves 2 to
4 ft building to 3 to 5 ft Friday. Waves 2 to 4 ft Friday
evening.

MICHIGAN SOUTH 10130 13230 12130 12120 11220. Chance of showers
Friday evening. Waves 4 to 7 ft occasionally to 9 ft overnight.
Waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to 4 ft
Friday. Waves 2 to 4 ft Friday evening.

$$


JEE

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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