Great Lakes Forecast
Issued by NWS

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082
FZUS63 KLOT 141948
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
248 PM CDT Tue Aug 14 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 30.0 inches over the Tennessee
Valley will slide southeast to the southern Appalachians tonight.
Low pressure of 29.8 inches over northern Wisconsin will move
across northern Lake Michigan tonight while a trailing cold front
sags south and stalls out over the center of the lake. On
Wednesday, a 29.7 inch low will move from the Central Plains
across the middle Mississippi Valley. The low will track
northeastward across lower Michigan on Thursday afternoon and
continue to Lake Ontario by Friday morning. Meanwhile, high
pressure of 30.3 inches will move from northern Manitoba to James
Bay by Friday and then continue east across northern Quebec into
the weekend.


LMZ261-362-364-366-563-565-567-868-150330-
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-
248 PM CDT Tue Aug 14 2018

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TONIGHT...Southwest winds 10 to 20 kt veering to northeast.
Chance of showers this evening, then slight chance of showers
overnight. Waves 2 to 4 ft.
.WEDNESDAY...Northeast winds 10 to 15 kt. Slight chance of
showers and thunderstorms in the morning. Waves 2 to 4 ft.
.WEDNESDAY NIGHT...Northeast winds 10 to 15 kt increasing to
10 to 20 kt. Waves 1 to 2 ft.
.THURSDAY...Northeast winds 10 to 20 kt. Waves 2 to 4 ft.
.THURSDAY NIGHT...North winds 10 to 20 kt diminishing to 10 to
15 kt. Waves 2 to 4 ft subsiding to 1 to 3 ft.
.FRIDAY...North winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 1 to 2 ft.
.FRIDAY NIGHT...North winds 10 to 15 kt becoming northeast. Waves
1 to 2 ft.
.SATURDAY...Northeast winds 10 to 15 kt diminishing to 5 to
10 kt. Waves 1 to 2 ft.
.SUNDAY...Southwest winds 10 to 15 kt. Waves 1 to 2 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-150330-
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-
248 PM CDT Tue Aug 14 2018

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TONIGHT...South winds 10 to 20 kt becoming southwest 10 to
15 kt. Waves 1 to 3 ft subsiding to 1 to 2 ft.
.WEDNESDAY...South winds 10 to 15 kt increasing to 10 to 20 kt.
Chance of showers and thunderstorms. Waves 1 to 2 ft.
.WEDNESDAY NIGHT...Southeast winds 10 to 20 kt becoming east.
Chance of showers and thunderstorms. Waves 1 to 3 ft.
.THURSDAY...Northeast winds 10 to 20 kt becoming north. Chance of
showers and thunderstorms in the morning. Waves 2 to 4 ft.
.THURSDAY NIGHT...North winds 10 to 20 kt diminishing to 10 to
15 kt. Waves 2 to 4 ft.
.FRIDAY...North winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 1 to 3 ft.
.FRIDAY NIGHT...North winds 10 to 20 kt becoming northeast. Waves
1 to 2 ft.
.SATURDAY...Northeast winds 10 to 20 kt diminishing to 10 to
15 kt. Waves 1 to 3 ft.
.SUNDAY...Southeast winds 5 to 10 kt. Waves 1 ft or less.

$$

LMZ761-150330-
MAFOR 1421/
MICHIGAN NORTH 12520 11620 11820 14110. Chance of showers early
this evening. Waves 2 to 4 ft.

MICHIGAN SOUTH 12420 12410 11510 12410 11416. Chance of showers
and thunderstorms Wednesday. Waves 1 to 3 ft subsiding to 1 to 2
ft tonight. Waves 1 to 2 ft Wednesday.

$$

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.pdf
Or Contact: Ed Fenelon at Edward.Fenelon@noaa.gov or Ben Schott
at Ben.Schott@noaa.gov



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