Great Lakes Forecast
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FZUS63 KLOT 200138
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
838 PM CDT Thu Oct 19 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...Expansive high pressure of 30.3 inches will remain
over the eastern Ohio Valley and mid Atlantic Coast through
Friday, and then gradually shift to the east through the weekend.
Meanwhile, a strong low averaging 29.1 inches over Hudson Bay will
move to Quebec tonight. Another strong low pressure will move
across the Canadian Prairies on Friday and Saturday and to Hudson
Bay on Sunday, with its trailing cold front crossing the lake by
Sunday.

LMZ261-362-364-366-563-565-567-868-200930-
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-
838 PM CDT Thu Oct 19 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TONIGHT...Southwest winds 10 to 20 kt. Waves 3 to 6 ft
occasionally to 8 ft.
.FRIDAY...South winds 15 to 25 kt increasing to 30 kt. Waves 3 to
6 ft occasionally to 8 ft building to 4 to 7 ft occasionally to
9 ft.
.FRIDAY NIGHT...South winds to 30 kt. Waves 4 to 7 ft
occasionally to 9 ft.
.SATURDAY...South winds to 30 kt. Waves 6 to 9 ft occasionally to
12 ft.
.SATURDAY NIGHT...South winds to 30 kt. Chance of showers. Waves
7 to 10 ft occasionally to 13 ft.
.SUNDAY...Southwest winds to 30 kt becoming west 15 to 25 kt.
Chance of showers in the morning...then showers likely in the
afternoon. Waves 5 to 8 ft occasionally to 10 ft subsiding to
4 to 6 ft occasionally to 8 ft.
.SUNDAY NIGHT...West winds 10 to 20 kt becoming southwest. Chance
of showers. Waves 2 to 4 ft.
.MONDAY...Southwest winds 10 to 20 kt. Waves 2 to 4 ft.
.TUESDAY...North winds to 30 kt. Chance of showers. Waves 4 to
7 ft occasionally to 9 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-200930-
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-
838 PM CDT Thu Oct 19 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TONIGHT...South winds 10 to 20 kt. Waves 2 to 4 ft.
.FRIDAY...South winds 15 to 25 kt. Waves building to 4 to 6 ft
occasionally to 8 ft.
.FRIDAY NIGHT...South winds 15 to 25 kt increasing to 30 kt.
Waves 4 to 6 ft occasionally to 8 ft.
.SATURDAY...South winds to 30 kt. Waves 5 to 8 ft occasionally to
10 ft.
.SATURDAY NIGHT...South winds to 30 kt. Chance of showers
overnight. Waves 5 to 8 ft occasionally to 10 ft.
.SUNDAY...Southwest winds to 30 kt becoming west 15 to 25 kt.
Showers likely in the morning...then showers in the afternoon.
Waves 4 to 7 ft occasionally to 9 ft subsiding to 4 to 6 ft
occasionally to 8 ft.
.SUNDAY NIGHT...West winds 10 to 20 kt. Chance of showers. Waves
2 to 4 ft.
.MONDAY...Southwest winds 10 to 20 kt. Chance of showers. Waves
1 to 3 ft.
.TUESDAY...Northwest winds to 30 kt increasing to gales to 35 kt.
Chance of showers. Waves 6 to 9 ft occasionally to 12 ft.

$$
LMZ761-200930-
MAFOR 2003/
MICHIGAN NORTH 13520 12530 11430 12440. Waves 3 to 6 feet
occasionally to 8 ft overnight. Waves 3 to 6 feet occasionally to
8 ft building to 4 to 7 feet occasionally to 9 feet Friday. Waves
4 to 7 feet occasionally to 9 feet Friday evening.

MICHIGAN SOUTH 13420 14430 11430. Waves 2 to 4 feet overnight.
Waves building to 4 to 6 feet occasionally to 8 feet Friday.
Waves 4 to 6 feet occasionally to 8 feet Friday evening.

$$


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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