Great Lakes Forecast
Issued by NWS

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000
FZUS63 KLOT 171350
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
850 AM CDT Sun Sep 17 2017

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 29.8 inches is over Southwest Ontario
will lift to Hudson Bay early Monday. High pressure of 30.2
inches over the northern plains will move to Lake Superior and
northern Lake Michigan Monday. Another low of 29.5 inches will
meander over the northern plains and Canadian Prairies Tuesday
through Thursday. Low pressure will consolidate over the central
plains Friday and lift to Hudson Bay Saturday.

LMZ261-362-364-366-563-565-567-868-172130-
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-
850 AM CDT Sun Sep 17 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TODAY...Southwest winds 10 to 20 kt becoming west.
Chance of showers and thunderstorms this morning...then slight
chance of showers and thunderstorms this afternoon. Waves 3 to
5 ft subsiding to 2 to 4 ft.
.TONIGHT...Northeast winds 10 to 20 kt increasing to 15 to 25 kt.
Waves 2 to 4 ft.
.MONDAY...Northeast winds 10 to 20 kt. Waves 2 to 4 ft.
.MONDAY NIGHT...Northeast winds 10 to 20 kt becoming east. Chance
of showers. Waves 1 to 3 ft.
.TUESDAY...East winds 10 to 20 kt. Waves 1 to 3 ft.
.TUESDAY NIGHT...East winds 10 to 20 kt becoming southeast. Waves
1 to 3 ft.
.WEDNESDAY...Southeast winds 10 to 20 kt becoming south. Waves
1 to 3 ft.
.THURSDAY...East winds 10 to 15 kt. Waves 1 to 3 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-172130-
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-
850 AM CDT Sun Sep 17 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TODAY...Southwest winds 10 to 20 kt veering to northwest
10 to 15 kt. Slight chance of showers and thunderstorms. Waves
2 to 4 ft subsiding to 1 to 3 ft.
.TONIGHT...North winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 1 to 3 ft building to 2 to 4 ft.
.MONDAY...Northeast winds 10 to 20 kt. Chance of showers and
thunderstorms in the afternoon. Waves 2 to 4 ft.
.MONDAY NIGHT...East winds 10 to 20 kt becoming southeast. Chance
of showers and thunderstorms in the evening...then chance of
showers overnight. Waves 2 to 4 ft.
.TUESDAY...East winds 10 to 15 kt. Waves 1 to 3 ft.
.TUESDAY NIGHT...East winds 10 to 15 kt becoming southeast 10 to
20 kt. Waves 1 to 3 ft.
.WEDNESDAY...Southeast winds 10 to 20 kt becoming south. Waves
1 to 3 ft.
.THURSDAY...Southeast winds 10 to 20 kt diminishing to 10 to
15 kt. Waves 1 to 3 ft.

$$
LMZ761-172130-
MAFOR 1715/
MICHIGAN NORTH 11520 12620 11720 11820 11120 12130. Chance of
showers and thunderstorms today. Waves 3 to 5 feet subsiding to 2
to 4 feet today. Waves 2 to 4 feet tonight and Monday morning.

MICHIGAN SOUTH 11520 12710 12810 12820 11120. Chance of showers
and thunderstorms today. Waves 2 to 4 feet subsiding to 1 to 3
feet today then building to 2 to 4 feet tonight and Monday
morning.

$$

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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