Great Lakes Forecast
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000
FZUS63 KLOT 140158
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
858 PM CDT Fri Jul 13 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...A trough of low pressure averaging 30.0 inches will
slowly slide south across the lake tonight while weakening. A
trough averaging 29.7 inches will move into the central Great
Plains Sunday and Sunday night as high pressure of 30.1 inches
builds over southeast Ontario. The trough and an associated cold
front will move across the lake Monday.

LMZ261-362-364-366-563-565-567-868-140800-
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-
858 PM CDT Fri Jul 13 2018

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TONIGHT...Southwest winds 10 to 20 kt becoming variable
around 10 kt overnight. Chance of showers and thunderstorms.
Waves 1 to 3 ft.
.SATURDAY...Southwest winds 5 to 10 kt. A chance of showers and
thunderstorms, mainly in the morning. Waves 1 to 2 ft.
.SATURDAY NIGHT...Variable winds less than 10 kt. Waves 1 ft or
less.
.SUNDAY...Variable winds less than 10 kt. Waves 1 ft or less.
.SUNDAY NIGHT...South winds 10 to 15 kt becoming southwest.
Chance of showers overnight. Waves 1 to 2 ft.
.MONDAY...West winds 10 to 15 kt diminishing to 5 to 10 kt.
Chance of showers in the morning. Waves 1 to 2 ft.
.MONDAY NIGHT...Northwest winds 10 to 20 kt becoming north. Waves
building to 2 to 4 ft.
.TUESDAY...North winds 10 to 20 kt. Waves 2 to 4 ft.
.WEDNESDAY...Northwest winds 10 to 15 kt backing to southwest.
Waves 1 to 2 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-140800-
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-
858 PM CDT Fri Jul 13 2018

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TONIGHT...South winds 10 to 15 kt becoming southwest.
Chance of showers and thunderstorms. Waves 1 to 3 ft.
.SATURDAY...Southwest winds around 10 kt backing to southeast.
Scattered showers and thunderstorms. Waves 1 to 2 ft.
.SATURDAY NIGHT...Northeast winds 5 to 10 kt becoming north. A
slight chance of showers and thunderstorms during the evening.
Waves 1 ft or less.
.SUNDAY...Variable winds 5 to 10 kt. Waves 1 ft or less.
.SUNDAY NIGHT...South winds 5 to 10 kt becoming southwest. Chance
of showers overnight. Waves 1 ft or less.
.MONDAY...West winds 5 to 10 kt becoming northwest 10 to 15 kt.
Chance of showers in the morning. Waves 1 to 2 ft.
.MONDAY NIGHT...Northwest winds 10 to 20 kt becoming north 15 to
20 kt. Waves building to 3 to 5 ft.
.TUESDAY...North winds 15 to 20 kt. Waves 3 to 5 ft.
.WEDNESDAY...East winds 10 to 15 kt becoming northeast. Waves
1 to 3 ft.

$$
LMZ761-140800-
MAFOR 1403/
MICHIGAN NORTH 11410 11510 11900 14500 11900. Chance of showers
and thunderstorms tonight and Saturday morning. Waves 1 to 3 ft.

MICHIGAN SOUTH 12410 19930 13510 11410 11300 11100. Chance of
showers and thunderstorms. Waves 1 to 3 ft.

$$

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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