Great Lakes Forecast
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000
FZUS63 KLOT 181944
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
244 PM CDT Tue Sep 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 30.2 inches will spread across
Ontario and the northern Great Lakes tonight while an old frontal
boundary stalls out just south of the lake. Low pressure of 29.5
inches will develop over the Central Plains Wednesday night and
then lift northeast to the Upper Mississippi Valley Thursday
evening. The low will track across the Upper Great Lakes Thursday
night while dragging a strong cold front across the lake. High
pressure of 30.4 inches will spread across the Upper Mississippi
Valley and Great Lakes Region Saturday.

LMZ261-362-364-366-563-565-567-868-190315-
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-
244 PM CDT Tue Sep 18 2018

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TONIGHT...North winds 10 to 20 kt becoming northeast. Waves 2 to
4 ft.
.WEDNESDAY...Northeast winds 10 to 20 kt becoming east. Slight
chance of showers and thunderstorms in the morning, then chance
of showers and thunderstorms in the afternoon. Waves 2 to 4 ft.
.WEDNESDAY NIGHT...East winds 10 to 15 kt becoming southeast.
Chance of showers in the evening, then showers likely overnight.
Waves 1 to 3 ft.
.THURSDAY...Southeast winds 10 to 20 kt increasing to 15 to
25 kt. Showers with a chance of thunderstorms in the morning,
then chance of showers and thunderstorms in the afternoon. Waves
1 to 3 ft building to 3 to 5 ft.
.THURSDAY NIGHT...South gales to 35 kt becoming southwest. Chance
of showers and thunderstorms. Waves 5 to 8 ft occasionally to
10 ft building to 7 to 10 ft occasionally to 13 ft.
.FRIDAY...West winds to 30 kt becoming northwest. Waves 7 to 10
ft occasionally to 13 ft subsiding to 4 to 7 ft occasionally to 9
ft.
.FRIDAY NIGHT...North winds to 30 kt becoming northeast 15 to
25 kt. Waves 4 to 7 ft occasionally to 9 ft.
.SATURDAY...East winds 10 to 15 kt becoming south. Waves 3 to
5 ft subsiding to 1 to 3 ft.
.SUNDAY...Southwest winds 10 to 20 kt becoming west. Waves 3 to
5 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-190315-
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-
244 PM CDT Tue Sep 18 2018

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TONIGHT...North winds 10 to 20 kt becoming northeast. Slight
chance of showers and thunderstorms overnight. Waves 3 to 5 ft
subsiding to 2 to 4 ft.
.WEDNESDAY...East winds 10 to 20 kt. Chance of showers and
thunderstorms. Waves 2 to 4 ft.
.WEDNESDAY NIGHT...East winds 10 to 15 kt becoming southeast.
Chance of showers and thunderstorms in the evening, then showers
and thunderstorms likely overnight. Waves 1 to 3 ft.
.THURSDAY...South winds 10 to 20 kt increasing to 15 to 25 kt.
Chance of showers and thunderstorms in the morning. Waves 1 to
3 ft building to 3 to 5 ft.
.THURSDAY NIGHT...South winds to 30 kt becoming southwest. Waves
6 to 9 ft occasionally to 12 ft.
.FRIDAY...West winds to 30 kt becoming northwest. Waves 6 to 9 ft
occasionally to 12 ft.
.FRIDAY NIGHT...North winds to 30 kt becoming northeast 15 to
25 kt. Waves 4 to 7 ft occasionally to 9 ft.
.SATURDAY...East winds 10 to 20 kt becoming southeast 5 to 10 kt.
Waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to 4 ft.
.SUNDAY...Southwest winds 10 to 20 kt becoming south 10 to 15 kt.
Waves 1 to 3 ft.

$$

LMZ761-190315-
MAFOR 1821/
MICHIGAN NORTH 12820 12120 12110 12210. Chance of showers and
thunderstorms Wednesday. Waves 2 to 4 ft.

MICHIGAN SOUTH 12820 12120 11110 12210 11220. Chance of showers
and thunderstorms Wednesday. Waves 3 to 5 ft subsiding to 2 to 4
ft tonight. Waves 2 to 4 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 19th 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


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