Great Lakes Forecast
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FZUS63 KLOT 100750
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
250 AM CDT Tue Oct 10 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 30.3 inches will move across the
upper lakes today and tonight. Weak low pressure of 29.9 inches
will move across the southern lakes region tonight and Wednesday.
A broad high pressure ridge averaging 30.1 inches will linger
over the eastern lakes through Friday. A cold front is expected
to move south across the lake Friday night as low pressure
develops over the central plains. This low is expected to move
across the lakes region Saturday night into Sunday.

LMZ261-362-364-366-563-565-567-868-101400-
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-
250 AM CDT Tue Oct 10 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TODAY...North winds 15 to 25 kt becoming northeast. Waves 4
to 6 ft occasionally to 8 ft.
.TONIGHT...Northeast winds 15 to 25 kt becoming east. Chance of
rain. Waves 4 to 6 ft occasionally to 8 ft.
.WEDNESDAY...East winds 15 to 25 kt. Chance of showers in the
morning. Waves 3 to 5 ft.
.WEDNESDAY NIGHT...East winds 15 to 25 kt becoming southeast 10
to 20 kt. Waves 3 to 5 ft.
.THURSDAY...Southeast winds 10 to 20 kt diminishing to 10 to 15
kt. Waves 1 to 3 ft.
.THURSDAY NIGHT...South winds 10 to 20 kt becoming southwest.
Waves 1 to 3 ft.
.FRIDAY...Southwest winds 15 to 25 kt. Chance of showers. Waves
2 to 4 ft.
.SATURDAY...North winds 15 to 25 kt becoming northeast. Waves 3
to 5 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-101400-
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-
250 AM CDT Tue Oct 10 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TODAY...Northeast winds 15 to 25 kt increasing to 30 kt.
Showers likely this afternoon. Waves 4 to 6 ft occasionally to
8 ft building to 5 to 8 ft occasionally to 10 ft.
.TONIGHT...Northeast winds to 30 kt becoming east. A few gale
gusts to 35 kt. Rain. Waves 6 to 9 ft occasionally to 12 ft.
.WEDNESDAY...East winds to 30 kt diminishing to 15 to 25 kt.
Chance of showers in the morning. Waves 6 to 9 ft occasionally
to 12 ft subsiding to 4 to 6 ft occasionally to 8 ft.
.WEDNESDAY NIGHT...East winds 15 to 25 kt. Waves 3 to 5 ft.
.THURSDAY...Southeast winds 10 to 20 kt diminishing to 10 to 15
kt. Waves 2 to 4 ft.
.THURSDAY NIGHT...South winds 10 to 20 kt becoming southwest.
Waves 1 to 3 ft.
.FRIDAY...South winds 15 to 25 kt. Waves 2 to 4 ft.
.SATURDAY...Northeast winds 15 to 25 kt. Chance of showers.
Waves 4 to 6 ft occasionally to 8 ft.

$$

LMZ761-101400-
MAFOR 1009/
MICHIGAN NORTH 13830 14130 11230. Chance of rain tonight. Waves
4 to 6 ft occasionally to 8 ft.

MICHIGAN SOUTH 13130 13146 12246. Waves 4 to 6 ft occasionally
to 8 ft building to 5 to 8 ft occasionally to 10 ft today. Waves
6 to 9 ft occasionally to 12 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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