Expires:202507180915;;628778
FZUS63 KMKX 180212
GLFLM 

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
912 PM CDT Thu Jul 17 2025

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 30.2 inches over the region will slowly move
to the east into Friday night. Low pressure around 29.8 inches
should then move into the Upper Mississippi River Valley Saturday.
Northeast winds will become east and weaken overnight over
southern portions of the lake, with light and variable winds to
the north. Light and variable winds will linger on Friday. 

Light to modest southerly winds will then develop Saturday 
morning, ahead of the approaching low pressure system. Winds will
turn to the north by Saturday evening, as the low moves east of
the region. Light to modest northeast winds will then prevail into
Sunday, while another high pressure area around 30.1 inches sets 
up over Lake Superior.


LMZ080-669-671-673-675-777-779-870-872-874-876-878-180915-
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-
912 PM CDT Thu Jul 17 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TONIGHT...North winds 10 to 20 kt becoming east 10 to
15 kt. Waves 3 to 5 ft subsiding to 2 to 4 ft. 
.FRIDAY...East winds 10 to 15 kt diminishing to 5 to 10 kt. Waves
1 to 3 ft subsiding to 1 to 2 ft. 
.FRIDAY NIGHT...East winds 5 to 10 kt veering to south. Chance of
showers overnight. Waves 1 to 2 ft. 
.SATURDAY...South winds 10 to 15 kt becoming southwest. Chance of
showers in the morning, then chance of showers and thunderstorms
in the afternoon. Waves 1 to 2 ft. 
.SATURDAY NIGHT...Northwest winds 10 to 15 kt becoming north.
Chance of showers and thunderstorms in the evening. Waves 1 to
3 ft. 
.SUNDAY...Northeast winds 10 to 15 kt becoming north. Waves 1 to
3 ft. 
.SUNDAY NIGHT...Northeast winds 10 to 15 kt becoming east. Waves
1 to 3 ft. 
.MONDAY...East winds 10 to 20 kt becoming southeast. Chance of
showers. Waves 2 to 4 ft. 
.TUESDAY...South winds 10 to 20 kt. Chance of showers. Waves 2 to
4 ft.  

$$