Great Lakes Forecast
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000
FZUS63 KLOT 151949
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
249 PM CDT Sat Jul 15 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...High pressure of 30.2 inches is centered over Illinois
and Indiana this afternoon and will spread southeast across the
Ohio Valley overnight into Sunday. A trough averaging 29.9 inches
over Lake Superior this afternoon will sag across Lake Michigan
this evening and overnight. Another high of 30.1 inches will build
across the western Great Lakes Sunday night into Monday then move
to the upper Ohio Valley Tuesday. A trough averaging 29.9 inches
will move from Lake Superior Tuesday and across Lake Michigan
Wednesday.

LMZ261-362-364-366-563-565-567-868-160345-
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-
249 PM CDT Sat Jul 15 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TONIGHT...South winds 15 to 25 kt veering to north. Chance of
showers and thunderstorms this evening. Waves 3 to 5 ft.
.SUNDAY...North winds 15 to 25 kt increasing to 30 kt. Waves 4 to
7 ft occasionally to 9 ft.
.SUNDAY NIGHT...North winds to 30 kt becoming northeast 10 to
15 kt. Waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to
4 ft.
.MONDAY...Northeast winds 5 to 10 kt backing to northwest. Waves
1 to 3 ft.
.MONDAY NIGHT...South winds 10 to 15 kt increasing to 10 to
20 kt. Waves 1 to 3 ft.
.TUESDAY...Southwest winds 10 to 20 kt becoming south. Waves 2 to
4 ft.
.TUESDAY NIGHT...Southwest winds 10 to 20 kt diminishing to 10 to
15 kt. Chance of showers and thunderstorms. Waves 2 to 4 ft.
.WEDNESDAY...South winds 10 to 20 kt. Chance of showers and
thunderstorms. Waves 2 to 4 ft.
.THURSDAY...Southwest winds 10 to 20 kt becoming northwest 10 to
15 kt. Chance of showers and thunderstorms. Waves 1 to 3 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-160345-
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-
249 PM CDT Sat Jul 15 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TONIGHT...South winds 10 to 20 kt veering to northwest 15 to
25 kt. Chance of showers and thunderstorms. Waves 2 to 4 ft.
.SUNDAY...North winds 15 to 25 kt increasing to 30 kt. Waves 3 to
5 ft building to 5 to 8 ft occasionally to 10 ft.
.SUNDAY NIGHT...North winds to 30 kt becoming northeast late in
the evening...then diminishing to 10 to 20 kt after midnight
becoming northeast 10 to 20 kt late. Waves 5 to 8 ft occasionally
to 10 ft subsiding to 3 to 5 ft.
.MONDAY...Northeast winds 10 to 15 kt becoming north. Waves 2 to
4 ft subsiding to 1 to 3 ft.
.MONDAY NIGHT...Northeast winds 5 to 10 kt veering to south.
Waves 1 to 2 ft.
.TUESDAY...South winds 10 to 20 kt. Waves 2 to 4 ft.
.TUESDAY NIGHT...South winds 10 to 20 kt becoming southwest.
Waves 2 to 4 ft.
.WEDNESDAY...Southwest winds 10 to 20 kt becoming south. Waves
1 to 3 ft.
.THURSDAY...Southwest winds 10 to 20 kt becoming west 10 to
15 kt. Chance of showers and thunderstorms. Waves 1 to 3 ft.

$$

LMZ761-160345-
MAFOR 1521/
MICHIGAN NORTH 11430 11530 11730 13830 12840. Chance of showers
and thunderstorms this evening. Waves 3 to 5 feet tonight. Waves 4
to 7 feet occasionally to 9 feet Sunday.

MICHIGAN SOUTH 12420 11520 11620 11730 12830 11840. Chance of
showers and thunderstorms tonight. Waves 2 to 4 feet tonight.
Waves 3 to 5 feet building to 5 to 8 feet occasionally to 10 feet
Sunday.

$$

BMD

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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