National Weather Service Marine Forecast FZUS63 KMKX
FZUS63 KMKX 310159
GLFLM
OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
859 PM CDT Fri Jul 30 2021
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 move across the lake tonight and
head into the eastern Great Lakes on Saturday. Weak low pressure
around 29.8 inches will track from the Upper Great Lakes to the
Lower Great Lakes over the weekend. Modest southwest winds will
develop over Lake Michigan for tonight into Saturday, followed by
another cold front bringing breezy northerly winds for Saturday
night and Sunday.
&&
LMZ261-362-364-366-563-565-567-868-310915-
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-
859 PM CDT Fri Jul 30 2021
SHEBOYGAN WI TO PENTWATER MI NORTH...
REST OF TONIGHT
South winds 10 to 15 kt becoming southwest
10 to 20 kt late this evening, then increasing to 15 to 25 kt
after midnight becoming southwest 15 to 25 kt late. Waves 1 to
2 ft building to 3 to 5 ft.
SATURDAY
Southwest winds 10 to 20 kt. Chance of showers in the
morning, then chance of showers and thunderstorms in the
afternoon. Haze with areas of smoke in the afternoon. Waves 3 to
5 ft subsiding to 2 to 4 ft.
SATURDAY NIGHT
West winds 10 to 15 kt becoming north 10 to
20 kt. Haze. Chance of showers and thunderstorms. Waves 2 to
4 ft.
SUNDAY
North winds 10 to 20 kt. Chance of showers in the
morning. Waves 3 to 5 ft.
SUNDAY NIGHT
North winds 10 to 20 kt. Waves 3 to 5 ft
subsiding to 2 to 4 ft.
MONDAY
Northwest winds 10 to 15 kt becoming west 5 to 10 kt.
Waves 1 to 3 ft.
MONDAY NIGHT
Southwest winds 10 to 15 kt. Waves 1 to 2 ft.
TUESDAY
West winds 10 to 15 kt becoming southwest. Waves 1 to
2 ft.
WEDNESDAY
Southwest winds 5 to 10 kt. Waves 1 ft or less.
LMZ080-669-671-673-675-777-779-870-872-874-876-878-310915-
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-
859 PM CDT Fri Jul 30 2021
SHEBOYGAN WI TO PENTWATER MI SOUTH...
REST OF TONIGHT
North winds 10 to 20 kt backing to west 10 to
15 kt. Waves 2 to 4 ft subsiding to 1 to 3 ft.
SATURDAY
Southwest winds 10 to 15 kt. Waves 1 to 3 ft.
SATURDAY NIGHT
Southwest winds 10 to 20 kt veering to north.
Chance of showers and thunderstorms. Haze overnight. Waves 2 to
4 ft.
SUNDAY
North winds 10 to 20 kt. Haze in the morning. Waves
4 to 6 ft occasionally to 8 ft.
SUNDAY NIGHT
North winds 10 to 20 kt becoming northeast. Waves
4 to 6 ft occasionally to 8 ft.
MONDAY
North winds 5 to 10 kt increasing to 10 to 15 kt. Waves
2 to 4 ft subsiding to 1 to 3 ft.
MONDAY NIGHT
North winds 10 to 15 kt becoming northwest 5 to
10 kt. Waves 1 to 2 ft.
TUESDAY
Northwest winds 5 to 10 kt becoming west. Waves 1 ft
or less.
WEDNESDAY
Northwest winds 5 to 10 kt veering to north. Waves
nearly calm.
LMZ761-310915-
MAFOR 3103/
MICHIGAN NORTH 11520 12530 11520 11620 11520 11610 11710. Chance
of showers Saturday morning, then chance of showers and
thunderstorms Saturday afternoon. Chance of showers and
thunderstorms Saturday evening. Waves 1 to 3 feet building to 3
to 5 feet overnight. Waves 3 to 5 feet subsiding to 1 to 3 feet
Saturday. Waves 1 to 3 feet Saturday evening.
MICHIGAN SOUTH 11800 12610 14510 11620. Chance of showers and
thunderstorms Saturday evening. Waves 1 to 3 feet.
Patterson
Experimental modernized open lake forecast is available online at
weather.gov/mkx/glftable
Graphical marine forecasts are available online at:
weather.gov/greatlakes
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