Great Lakes Forecast
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000
FZUS63 KLOT 201333
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
833 AM CDT Thu Jul 20 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...A trough of low pressure will move over the lake
today averaging 29.9 inches. A weak high of 30.0 inches will move
over the lake early Friday morning, and shift over the eastern
Great Lakes Friday evening. Low pressure of 29.6 inches will move
over the lake Saturday night.

LMZ261-362-364-366-563-565-567-868-202145-
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-
833 AM CDT Thu Jul 20 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TODAY...Southwest winds 10 to 15 kt. Waves 1 to 2 ft.
.TONIGHT...Variable winds 5 to 10 kt. Waves around 1 ft.
.FRIDAY...South winds 5 to 10 kt increasing to 10 to 15 kt.
Waves around 1 ft.
.FRIDAY NIGHT...Southeast winds 10 to 15 kt. Chance of showers
and thunderstorms. Waves 1 to 2 ft.
.SATURDAY...Southeast winds 10 to 15 kt becoming northeast.
Chance of showers and thunderstorms. Waves 1 to 2 ft.
.SATURDAY NIGHT...Northeast winds 10 to 15 kt becoming north
10 to 20 kt. Waves 1 to 2 ft.
.SUNDAY...North winds 10 to 20 kt. Waves 2 to 4 ft.
.MONDAY...North winds 15 to 25 kt diminishing to 10 to 20 kt.
Waves 2 to 4 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-202145-
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-
833 AM CDT Thu Jul 20 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TODAY...Southwest winds 10 to 20 kt veering to north 10
to 15 kt late this afternoon. Slight chance of showers this
morning...then slight chance of showers and thunderstorms this
afternoon. Waves 2 to 4 ft subsiding to 1 to 2 ft.
.TONIGHT...Northeast winds 10 to 15 kt diminishing to 5 to 10 kt
and becoming variable. Waves 1 to 3 ft.
.FRIDAY...East winds 5 to 10 kt becoming southeast 10 to 15 kt.
Waves 1 to 2 ft.
.FRIDAY NIGHT...Southeast winds 10 to 20 kt. Showers and
thunderstorms likely in the evening...then showers and
thunderstorms overnight. Waves 2 to 4 ft.
.SATURDAY...South winds 10 to 20 kt becoming southwest 10 to 15
kt. Chance of showers and thunderstorms. Waves 1 to 3 ft.
.SATURDAY NIGHT...Northwest winds 10 to 15 kt increasing to 10
to 20 kt. Chance of showers and thunderstorms. Waves 1 to 3 ft.
.SUNDAY...Northwest winds 10 to 20 kt. Waves 2 to 4 ft.
.MONDAY...North winds 15 to 25 kt diminishing to 10 to 20 kt.
Waves 3 to 5 ft.

$$
LMZ761-202145-
MAFOR 2015/
MICHIGAN NORTH 12510 11410 14900 11400. Waves 1 to 2 feet today.
Waves 1 foot or less tonight and Friday morning.


MICHIGAN SOUTH 11520 11510 11810 11110 13900 11200. Waves 2 to 4
feet subsiding to 1 to 2 ft today. Waves 1 to 3 feet tonight.
Waves 1 to 2 feet Friday morning.

$$


JEE

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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