Expires:202507181530;;642123
FZUS63 KMKX 180804
GLFLM 

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
304 AM CDT Fri Jul 18 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 through tonight. Low pressure around 29.8 inches 
cross the Upper Great Lakes Saturday. Showers and thunderstorms
are likely at times Saturday. High pressure around 30.0 inches 
will settle back into the region Sunday, then slowly depart 
Monday. A low pressure trough of 29.8 inches will cross the Upper 
Midwest on Tuesday. 

Light to modest southerly winds will develop Saturday morning 
ahead of the approaching low pressure system. Winds will become north
by Saturday evening, then modest northeast winds will prevail 
into Sunday.


LMZ080-669-671-673-675-777-779-870-872-874-876-878-181530-
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-
304 AM CDT Fri Jul 18 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TODAY...East winds 10 to 15 kt becoming southeast 5 to 10 kt.
Waves 1 to 3 ft. 
.TONIGHT...East winds 5 to 10 kt becoming south. Waves 1 to 2 ft.
.SATURDAY...South winds 10 to 15 kt becoming southwest. Chance of
showers and thunderstorms. Waves 1 to 3 ft. 
.SATURDAY NIGHT...North winds 10 to 15 kt. 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. Chance of showers. Waves 2 to
4 ft. 
.TUESDAY...Southeast winds 10 to 20 kt. Waves 2 to 4 ft.  

$$