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National Weather Service Marine Forecast FZUS63 KMKX

FZUS63 KMKX 171339
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
839 AM CDT Wed Oct 17 2018

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

Low pressure of 29.4 inches will move across Quebec today. Brisk
northwest winds are expected today. High pressure of 30.5 inches
will move into northern Missouri today and into the Ohio River
Valley on Thursday. Southwest gales are possible Thursday
afternoon and night over northern portions of Lake Michigan.
Another low pressure around 29.5 inches will slide through
northern Ontario on Friday, with the associated cold front
tracking across Lake Michigan Friday night. Gales may occur over
the entire lake Friday into Friday night.

LMZ261-362-364-366-563-565-567-868-172115-
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-
839 AM CDT Wed Oct 17 2018

SHEBOYGAN WI TO PENTWATER MI NORTH...

...GALE WATCH IN EFFECT FROM THURSDAY AFTERNOON THROUGH LATE
THURSDAY NIGHT...

REST OF TODAY
Northwest winds to 30 kt. Chance of rain showers
through mid morning, then slight chance of rain showers this
afternoon. Waves 4 to 7 ft occasionally to 9 ft.

TONIGHT
Northwest winds to 30 kt diminishing to 10 to 20 kt.
Waves 4 to 7 ft occasionally to 9 ft subsiding to 3 to 5 ft.

THURSDAY
West winds 10 to 20 kt becoming southwest late in the
morning, then increasing to 30 kt early in the afternoon
increasing to gales to 40 kt late. Waves 2 to 4 ft building to
8 to 11 ft occasionally to 14 ft.

THURSDAY NIGHT
Southwest gales to 40 kt diminishing to gales
to 35 kt. Waves 8 to 12 ft occasionally to 16 ft subsiding to
7 to 10 ft occasionally to 13 ft.

FRIDAY
Southwest gales to 45 kt diminishing to gales to 40 kt.
Chance of showers. Waves 7 to 10 ft occasionally to 13 ft
building to 8 to 11 ft occasionally to 14 ft.

FRIDAY NIGHT
West gales to 35 kt becoming northwest to 30 kt.
Chance of rain showers. Waves 7 to 10 ft occasionally to 13 ft
subsiding to 5 to 8 ft occasionally to 10 ft.

SATURDAY
Northwest winds to 30 kt. Scattered rain showers.
Waves 5 to 8 ft occasionally to 10 ft.

SUNDAY
Northwest winds 10 to 20 kt becoming west 15 to 25 kt.
Waves 4 to 7 ft occasionally to 9 ft subsiding to 2 to 4 ft. 



LMZ080-669-671-673-675-777-779-870-872-874-876-878-172115-
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-
839 AM CDT Wed Oct 17 2018

SHEBOYGAN WI TO PENTWATER MI SOUTH...

REST OF TODAY
Northwest winds to 30 kt. Slight chance of rain
showers. Waves 7 to 10 ft occasionally to 13 ft subsiding to 6 to
9 ft occasionally to 12 ft.

TONIGHT
Northwest winds to 30 kt diminishing to 10 to 20 kt.
Waves 6 to 9 ft occasionally to 12 ft subsiding to 4 to 6 ft
occasionally to 8 ft.

THURSDAY
Northwest winds 10 to 15 kt becoming west 10 to 20 kt
late in the morning, then becoming southwest early in the
afternoon increasing to 15 to 25 kt late. Waves 3 to 5 ft
building to 4 to 6 ft occasionally to 8 ft.

THURSDAY NIGHT
Southwest winds to 30 kt. Waves 5 to 8 ft
occasionally to 10 ft.

FRIDAY
Southwest gales to 35 kt. Chance of showers in the
afternoon. Waves 6 to 9 ft occasionally to 12 ft.

FRIDAY NIGHT
Southwest gales to 35 kt becoming northwest.
Chance of showers. Waves 6 to 9 ft occasionally to 12 ft.

SATURDAY
Northwest winds to 30 kt increasing to gales to
35 kt. Numerous rain showers. Waves 7 to 10 ft occasionally to
13 ft.

SUNDAY
Northwest winds 15 to 25 kt becoming west 10 to 20 kt.
Waves 6 to 9 ft occasionally to 12 ft subsiding to 4 to 6 ft
occasionally to 8 ft. 



LMZ761-172115-
MAFOR 1715/
MICHIGAN NORTH 12740 13730 11720 11710 11610. Chance of rain
showers late this morning. Waves 5 to 8 ft occasionally to 10 ft
subsiding to 4 to 7 ft occasionally to 9 ft this afternoon. Waves
4 to 7 ft occasionally to 9 ft subsiding to 3 to 5 ft tonight.
Waves 2 to 4 ft Thursday morning.

MICHIGAN SOUTH 14740 11730 12720 11610. Waves 7 to 10 ft
occasionally to 13 ft this afternoon. Waves 6 to 9 ft
occasionally to 12 ft subsiding to 4 to 6 ft occasionally to 8 ft
tonight. Waves 3 to 5 ft subsiding to 2 to 4 ft Thursday morning.



Boxell

Experimental modernized open lake forecast is available online at
weather.gov/mkx/glftable

Graphical marine forecasts are available online at:
weather.gov/greatlakes