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FZUS63 KMKX 270805

GLFLM 



OPEN LAKE FORECAST for Lake Michigan

National Weather Service Milwaukee/Sullivan WI

305 AM CDT Sat Apr 27 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...



Low pressure around 29.3 inches over southern Minnesota continues

to drift northeastward this morning, reaching Lake Superior around

noon today. Gusty south winds are expected across Lake Michigan

today, with a few gusts approaching gale force, especially in the

northern half of the lake. Winds will then become light and 

northeasterly tonight into Sunday morning as the low exits and a 

weak cold front drapes across central portions of the lake. Sunday

into Sunday night, winds will become breezy and southerly south 

of the front and will become breezy and easterly to northeasterly 

north of the front. 



A few thunderstorms are expected to cross southern Lake Michigan

early this morning. Additional rounds of showers and 

thunderstorms are expected this afternoon through Sunday. A few 

storms this afternoon and evening could produce locally gusty 

winds and hail.





LMZ261-362-364-366-563-565-567-868-271530-

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-

305 AM CDT Sat Apr 27 2024



SHEBOYGAN WI TO PENTWATER MI NORTH...



.TODAY...South winds to 30 kt with a few gusts to gale force. 

Chance of showers and slight chance of thunderstorms this morning,

then slight chance of showers and thunderstorms this afternoon. 

Waves 6 to 9 ft occasionally to 12 ft. 

.TONIGHT...Southwest winds to 30 kt diminishing to 10 to 20 kt

late in the evening, then becoming northwest 10 to 15 kt after

midnight becoming north late. Chance of rain showers and

thunderstorms in the evening, then slight chance of rain showers

and thunderstorms overnight. Waves 6 to 9 ft occasionally to

12 ft subsiding to 3 to 5 ft. 

.SUNDAY...North winds 10 to 20 kt becoming northeast. Chance of

rain showers in the morning, then rain showers in the afternoon.

Waves 3 to 5 ft. 

.SUNDAY NIGHT...East winds to 30 kt becoming southeast gales to

40 kt overnight. Rain showers. Waves 4 to 6 ft occasionally to

8 ft building to 4 to 7 ft occasionally to 9 ft. 

.MONDAY...Southeast gales to 40 kt becoming south to 30 kt in the

afternoon. Rain showers in the morning, then rain showers likely

in the afternoon. Waves 4 to 7 ft occasionally to 9 ft building

to 5 to 8 ft occasionally to 10 ft. 

.MONDAY NIGHT...Southwest winds 10 to 20 kt diminishing to 10 to

15 kt. Waves 5 to 8 ft occasionally to 10 ft subsiding to 3 to

5 ft. 

.TUESDAY...Southwest winds 10 to 15 kt becoming south 10 to

20 kt. Waves 2 to 4 ft. 

.WEDNESDAY...Southwest winds 10 to 20 kt. Waves 2 to 4 ft.  



$$



LMZ080-669-671-673-675-777-779-870-872-874-876-878-271530-

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-

305 AM CDT Sat Apr 27 2024



SHEBOYGAN WI TO PENTWATER MI SOUTH...



.TODAY...South winds to 30 kt. Slight chance of showers and

thunderstorms. Waves 6 to 9 ft occasionally to 12 ft. 

.TONIGHT...South winds to 30 kt diminishing to 10 to 15 kt.

Chance of rain showers and thunderstorms. Waves 5 to 8 ft

occasionally to 10 ft subsiding to 3 to 5 ft. 

.SUNDAY...Southeast winds 10 to 20 kt. Rain showers with a chance

of thunderstorms in the morning, then chance of rain showers in

the afternoon. Waves 3 to 5 ft. 

.SUNDAY NIGHT...Southeast winds 10 to 20 kt becoming south. Rain

showers with a chance of thunderstorms. Waves 3 to 5 ft building

to 4 to 6 ft occasionally to 8 ft. 

.MONDAY...South winds 15 to 25 kt. Showers likely in the morning,

then chance of showers in the afternoon. Waves 4 to 7 ft

occasionally to 9 ft building to 5 to 8 ft occasionally to 10 ft.

.MONDAY NIGHT...Southwest winds 15 to 25 kt becoming west 10 to

15 kt. Waves 5 to 8 ft occasionally to 10 ft subsiding to 3 to

5 ft. 

.TUESDAY...West winds 10 to 15 kt backing to south 10 to 20 kt.

Waves 1 to 3 ft. 

.WEDNESDAY...Southwest winds 10 to 20 kt becoming south. Waves

2 to 4 ft.  



$$



LMZ761-271530-

MAFOR 2710/

MICHIGAN NORTH 11446 13440 11540 11530 11610 11810. A chance of 

thunderstorms this evening. Waves 5 to 8 feet building to 6 to 9 

feet today. Waves 5 to 8 feet subsiding to 2 to 4 feet tonight. 



MICHIGAN SOUTH 11440 12440 12440 11430 11530 11510. A chance of 

showers early this morning. A chance of showers and thunderstorms 

tonight. Waves 5 to 8 feet today. Waves 4 to 7 feet subsiding to 2

to 4 feet tonight. 



$$





Sheppard



Experimental modernized open lake forecast is available online at

weather.gov/mkx/glftable



Graphical marine forecasts are available online at:

weather.gov/greatlakes