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National Weather Service Marine Forecast FZUS63 KLOT

FZUS63 KLOT 230144
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
844 PM CDT Tue Aug 22 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
Low pressure of 29.3 inches over central Quebec will
gradually shift northeast while deepening to 29.2 inches tonight.
The low will then fill back to 29.4 inches while gradually
shifting eastward across the providence through early Thursday
morning. Farther west, high pressure of 30.1 inches will continue
to spread southeast over the Plains tonight. The high will
eventually drift east to the western Lakes by early Thursday, then
will remain in place and strengthen to 30.2 inches while drifting
very slowly east into Saturday.

LMZ261-362-364-366-563-565-567-868-230800-
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-
844 PM CDT Tue Aug 22 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

REST OF TONIGHT
Northwest winds 15 to 25 kt. Waves 4 to 6 ft
occasionally to 8 ft.

WEDNESDAY
Northwest winds 10 to 20 kt becoming north. Waves
4 to 6 ft occasionally to 8 ft subsiding to 2 to 4 ft.

WEDNESDAY NIGHT
North winds 15 to 25 kt diminishing to 10 to
20 kt. Waves 2 to 4 ft.

THURSDAY
North winds 10 to 20 kt. Waves 2 to 4 ft.

THURSDAY NIGHT
North winds 10 to 20 kt becoming northeast
10 to 15 kt. Waves 1 to 3 ft.

FRIDAY
North winds 5 to 10 kt increasing to 10 to 15 kt. Waves
2 ft or less.

FRIDAY NIGHT
Northeast winds 5 to 10 kt becoming east. Waves
2 ft or less.

SATURDAY
East winds 5 to 10 kt. Waves 1 ft or less.

SUNDAY
South winds 10 to 15 kt becoming southeast. Waves 1 to
2 ft. 



LMZ080-669-671-673-675-777-779-870-872-874-876-878-230800-
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-
844 PM CDT Tue Aug 22 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

REST OF TONIGHT
Northwest winds 15 to 25 kt. Waves 5 to 8 ft
occasionally to 10 ft.

WEDNESDAY
Northwest winds 10 to 20 kt becoming north. Waves
4 to 7 ft occasionally to 9 ft subsiding to 3 to 5 ft.

WEDNESDAY NIGHT
North winds 10 to 20 kt becoming northeast.
Waves 3 to 5 ft subsiding to 1 to 3 ft.

THURSDAY
North winds 10 to 20 kt. Waves 2 to 4 ft.

THURSDAY NIGHT
Northeast winds 10 to 20 kt diminishing to
10 to 15 kt. Waves 2 to 4 ft.

FRIDAY
Northeast winds 10 to 15 kt. Waves 1 to 2 ft.

FRIDAY NIGHT
Northeast winds 5 to 10 kt becoming east. Waves
2 ft or less.

SATURDAY
East winds 5 to 10 kt. Waves 1 ft or less.

SUNDAY
Southeast winds 10 to 20 kt becoming east 10 to 15 kt.
Waves 1 to 2 ft. 


LMZ761-230800-
MAFOR 2303/
MICHIGAN NORTH 13730 13720 11820 11830. Waves 4 to 6 ft
occasionally to 8 ft tonight. Waves 4 to 6 ft occasionally to 8
ft subsiding to 2 to 4 ft Wednesday.

MICHIGAN SOUTH 13730 12720 13820. Waves 5 to 8 ft occasionally
to 10 ft tonight. Waves 4 to 7 ft occasionally to 9 ft subsiding
to 3 to 5 ft Wednesday.



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

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