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National Weather Service Marine Forecast FZUS63 KMKX

FZUS63 KMKX 200158
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
858 PM CDT Thu Sep 19 2024

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 around 30.0 inches over the eastern Great Lakes will hold fairly steady tonight into Friday, while low pressure around 29.3 inches lifts northward through Manitoba. This will produce light to modest south to southerly winds into Friday. A weak cool front will push southeastward across the open waters Friday evening, bringing scattered showers and isolated thunderstorms from later tonight into Friday.

Weak high pressure will then settle over the lake for Saturday morning, followed by the passage of a weak wave of low pressure around 29.8 inches for late Saturday night and Sunday. Light to modest southeasterly winds can be expected ahead of this low.

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
858 PM CDT Thu Sep 19 2024

SHEBOYGAN WI TO PENTWATER MI NORTH...

REST OF TONIGHT
Southeast winds 10 to 15 kt becoming south 10 to 20 kt. Chance of showers and slight chance of thunderstorms overnight. Waves 1 to 3 ft.

FRIDAY
South winds 10 to 20 kt. Chance of showers and thunderstorms. Waves 2 to 4 ft.

FRIDAY NIGHT
South winds 10 to 15 kt becoming southwest 5 to 10 kt, then becoming west late. Patchy fog overnight. Waves 1 to 3 ft subsiding to 1 to 2 ft.

SATURDAY
West winds 5 to 10 kt backing to south. Patchy dense fog in the morning. Waves 1 to 2 ft.

SATURDAY NIGHT
Southeast winds 5 to 10 kt. Waves 1 to 2 ft.

SUNDAY
South winds 10 to 15 kt veering to northwest 10 to 20 kt. Chance of showers. Waves 1 to 3 ft.

SUNDAY NIGHT
North winds 10 to 20 kt. Showers likely. Waves 2 to 4 ft.

MONDAY
North winds 10 to 20 kt. Chance of showers and thunderstorms. Waves 2 to 4 ft.

TUESDAY
Southeast winds 10 to 20 kt becoming south. Chance of showers. Waves 1 to 3 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
858 PM CDT Thu Sep 19 2024

SHEBOYGAN WI TO PENTWATER MI SOUTH...

REST OF TONIGHT
Southeast winds 10 to 15 kt becoming south 10 to 20 kt. Chance of showers overnight. Waves 1 to 3 ft.

FRIDAY
South winds 10 to 20 kt diminishing to 10 to 15 kt. Chance of showers and slight chance of thunderstorms. Waves 2 to 4 ft.

FRIDAY NIGHT
South winds 5 to 10 kt veering to northwest. Waves 1 to 3 ft subsiding to 1 ft or less.

SATURDAY
Northeast winds 5 to 10 kt becoming southeast. Waves 1 ft or less.

SATURDAY NIGHT
East winds 5 to 10 kt becoming southeast. Waves 1 to 2 ft.

SUNDAY
South winds 10 to 15 kt becoming southwest 10 to 20 kt. Chance of showers in the morning, then chance of showers and thunderstorms in the afternoon. Waves 1 to 3 ft.

SUNDAY NIGHT
North winds 10 to 20 kt. Showers with a chance of thunderstorms. Waves 2 to 4 ft.

MONDAY
North winds 10 to 20 kt. Chance of showers. Waves 3 to 5 ft.

TUESDAY
South winds 10 to 20 kt becoming southwest. Waves 2 to 4 ft.

LMZ761-200930
MAFOR 2004/ MICHIGAN NORTH 11410 11420 11410 13420 11410 11510. A chance of showers overnight. A chance of showers and thunderstorms Friday. Waves 2 feet or less overnight. Waves 1 to 3 feet Friday and Friday evening.

MICHIGAN SOUTH 11320 13420 11520 12410 11500. A chance of showers overnight and Friday. Waves 1 to 3 feet overnight and Friday. Waves 2 feet or less Friday evening.

DDV

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

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