Great Lakes Forecast
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817
FZUS63 KLOT 170747
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
247 AM CDT Mon Jul 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...High pressure of 30.1 inches will remain over the
western Great Lakes region today before moving to the Ohio Valley
Tuesday. A trough averaging 29.9 inches will then move from Lake
Superior Tuesday and across Lake Michigan on Wednesday.

LMZ261-362-364-366-563-565-567-868-171400-
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-
247 AM CDT Mon Jul 17 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TODAY...Northeast winds 10 to 15 kt becoming variable 5 to 10
kt midday...then south late this afternoon. Waves 2 to 4 ft
subsiding to 1 to 2 ft.
.TONIGHT...South winds increasing to 10 to 20 kt. Waves 1 to 2
ft.
.TUESDAY...Southwest winds 10 to 20 kt becoming south 15 to 25
kt. Waves 2 to 4 ft.
.TUESDAY NIGHT...Southwest winds 10 to 20 kt becoming west.
Chance of showers and thunderstorms in the evening...then showers
and thunderstorms likely overnight. Waves 2 to 4 ft.
.WEDNESDAY...North winds 10 to 15 kt becoming northwest 5 to 10
kt. Chance of showers and thunderstorms in the morning. Waves 1
to 3 ft.
.WEDNESDAY NIGHT...Southwest winds 5 to 10 kt becoming south 10
to 15 kt. Waves 1 to 2 ft.
.THURSDAY...Southwest winds 10 to 15 kt becoming west. Waves 1
to 2 ft.
.FRIDAY...Southeast winds 10 to 15 kt veering to southwest. Waves
1 to 2 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-171400-
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-
247 AM CDT Mon Jul 17 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TODAY...Northeast winds 10 to 20 kt becoming north 10 to 15 kt.
Waves 3 to 5 ft subsiding to 1 to 3 ft.
.TONIGHT...Northeast winds 10 to 15 kt becoming southwest 5 to
10 kt overnight. Waves 1 to 2 ft.
.TUESDAY...Southwest winds 10 to 15 kt becoming south 10 to 20
kt. Waves 1 to 3 ft.
.TUESDAY NIGHT...South winds 10 to 20 kt becoming southwest.
Chance of showers and thunderstorms overnight. Waves 1 to 3 ft.
.WEDNESDAY...Northwest winds 10 to 20 kt diminishing to 10 to 15
kt. Chance of showers and thunderstorms in the morning. Waves 1
to 3 ft.
.WEDNESDAY NIGHT...West winds 5 to 10 kt backing to south 10 to
15 kt. Chance of showers and thunderstorms. Waves 1 to 2 ft.
.THURSDAY...Southwest winds 10 to 15 kt becoming west. Chance of
showers and thunderstorms. Waves 1 to 2 ft.
.FRIDAY...Northeast winds 10 to 15 kt becoming east 10 to 20 kt.
Chance of showers and thunderstorms. Waves 1 to 3 ft.

$$

LMZ761-171400-
MAFOR 1709/
MICHIGAN NORTH 12110 12900 12400 11410 11420. Waves 2 to 4 ft
subsiding to 1 to 2 ft today.

MICHIGAN SOUTH 12120 11110 12810 11110 11100 19400 11500.
Waves 3 to 5 ft subsiding to 1 to 3 ft today. Waves 1 to 2 ft
tonight.

$$

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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