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FZUS63 KLOT 212012
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
312 PM CDT Tue Aug 21 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...Low pressure of 29.6 inches over Lake Huron will
deepen further to 29.3 moves as it moves through Quebec. High
pressure of 30.3 inches over the northern and central Plains will
build east into the middle and upper Mississippi Valley region by
Wednesday night and into the Ohio Valley Thursday and Friday.
Meanwhile, a 29.6 inch low pressure trough will develop over the
northern High Plains and spread to northern Lake Michigan early
Saturday at 29.8 inches.

LMZ261-362-364-563-220330-
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 Rock Island Passage to Sturgeon Bay WI-
312 PM CDT Tue Aug 21 2018

STURGEON BAY WI TO POINT BETSIE MI NORTH...

.TONIGHT...North winds to 30 kt. Waves 4 to 7 ft occasionally to 9
ft building to 6 to 9 ft occasionally to 12 ft.
.WEDNESDAY...Northwest winds 15 to 25 kt easing to 10 to 20 kt.
Slight chance of showers in the afternoon. Waves 3 to 5 ft
subsiding to 2 to 4 ft from late morning on.
.WEDNESDAY NIGHT...West winds 10 to 15 kt. Waves 1 to 3 ft.
.THURSDAY...Southwest winds 10 to 20 kt. Waves 1 to 3 ft building
to 2 to 4 ft in the afternoon.
.THURSDAY NIGHT...Southwest winds 10 to 20 kt. Waves 3 to 5 ft.
.FRIDAY...South winds to 30 kt. Chance of showers and
thunderstorms in the morning, then showers likely with a chance
of thunderstorms in the afternoon. Waves 4 to 7 ft occasionally
to 9 ft building to 6 to 9 ft occasionally to 12 ft in the
afternoon.
.FRIDAY NIGHT...South winds to 30 kt. Chance of showers and
thunderstorms. Waves 6 to 9 ft occasionally to 12 ft.
.SATURDAY...Southwest winds 15 to 25 kt. Chance of showers and
thunderstorms. Waves 5 to 8 ft occasionally to 10 ft subsiding to
4 to 6 ft occasionally to 8 ft.
.SUNDAY...Southwest winds 10 to 20 kt. Waves 2 to 4 ft.

$$

LMZ366-565-567-669-671-868-870-872-220330-
Lake Michigan from Point Betsie to Manistee MI 5 NM offshore to
Mid Lake-
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 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 Pentwater to Manistee MI 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-
312 PM CDT Tue Aug 21 2018

STURGEON BAY WI TO POINT BETSIE MI SOUTH TO NORTH POINT LIGHT WI
TO GRAND HAVEN MI...

.TONIGHT...North winds to 30 kt. Slight chance of waterspouts
this evening. Chance of thunderstorms with isolated showers this
evening. Waves 7 to 10 ft occasionally to 13 ft.
.WEDNESDAY...Northwest winds 15 to 25 kt. Waves 5 to 8 ft
occasionally to 10 ft subsiding to 3 to 5 ft.
.WEDNESDAY NIGHT...West winds 10 to 15 kt. Waves 1 to 3 ft.
.THURSDAY...West winds 10 to 15 kt becoming southwest 10 to
20 kt. Waves 1 to 3 ft.
.THURSDAY NIGHT...South winds 15 to 25 kt. Waves 2 to 4 ft
building to 3 to 5 ft overnight.
.FRIDAY...South winds to 30 kt with a few gale force gusts to 35
kt. Chance of showers and thunderstorms in the morning, then
showers likely with a chance of thunderstorms in the afternoon.
Waves 6 to 9 ft occasionally to 12 ft.
.FRIDAY NIGHT...Southwest winds to 30 kt. Chance of showers and
thunderstorms. Waves 6 to 9 ft occasionally to 12 ft.
.SATURDAY...Southwest winds 15 to 25 kt. Waves 5 to 8 ft
occasionally to 10 ft subsiding to 3 to 5 ft.
.SUNDAY...Southwest winds 10 to 20 kt. Chance of showers and
thunderstorms. Waves 1 to 3 ft.

$$

LMZ080-673-675-777-779-874-876-878-220330-
Lake Michigan from Michigan City IN to St. Joseph MI 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 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-
312 PM CDT Tue Aug 21 2018

NORTH POINT LIGHT WI TO GRAND HAVEN MI SOUTH...

.TONIGHT...North winds to 30 kt. Chance of waterspouts this
evening. Scattered showers with a chance of thunderstorms this
evening. Waves 7 to 10 ft occasionally to 13 ft.
.WEDNESDAY...Northwest winds 15 to 25 kt. Waves 6 to 9 ft
occasionally to 12 ft subsiding to 3 to 5 ft.
.WEDNESDAY NIGHT...Northwest winds 10 to 15 kt. Waves 2 to 4 ft
subsiding to 1 to 3 ft overnight.
.THURSDAY...West winds 5 to 10 kt becoming southwest 10 to 15 kt.
Waves 1 to 2 ft.
.THURSDAY NIGHT...South winds 15 to 25 kt. Waves 1 to 3 ft
building to 3 to 5 ft overnight.
.FRIDAY...South winds to 30 kt. Showers likely with a chance of
thunderstorms. Waves 4 to 7 ft occasionally to 9 ft building to
6 to 9 ft occasionally to 12 ft in the afternoon.
.FRIDAY NIGHT...Southwest winds to 30 kt. Chance of showers and
thunderstorms. Waves 6 to 9 ft occasionally to 12 ft.
.SATURDAY...Southwest winds 15 to 25 kt. Waves 4 to 7 ft
occasionally to 9 ft subsiding to 3 to 5 ft.
.SUNDAY...Southwest winds 10 to 20 kt. Chance of showers and
thunderstorms. Waves 1 to 3 ft.

$$

LMZ761-220330-
MAFOR 2121/
MICHIGAN NORTH 14840 11840 11730 12720. Waves 4 to 7 ft building
to 6 to 9 ft occasionally to 12 ft tonight. Waves 5 to 8 ft
occasionally to 10 ft subsiding to 2 to 4 ft Wednesday.

MICHIGAN SOUTH 14840 11840 12730 11720. Chance of waterspouts
early this evening. Scattered showers and chance of thunderstorms
early this evening. Waves 7 to 10 ft occasionally to 13 ft
tonight. Waves 6 to 9 ft occasionally to 12 ft subsiding to 3 to 5
ft late Wednesday.

$$

KMD

Experimental modernized open lake forecast is available online at
weather.gov/lot/glftable

Graphical marine forecasts are available online at:
weather.gov/greatlakes

NOTICE - Starting Wednesday September 5th 2018 this product will
be issued by NWS Milwaukee. For additional information:

https://www.weather.gov/media/notification/pdfs/scn18-64lake_michigan_transfer.p
df
Or Contact: Ed Fenelon at Edward.Fenelon@noaa.gov or Ben Schott
at Ben.Schott@noaa.gov

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