Expires:202507201515;;757262
FZUS63 KMKX 200755
GLFLM 

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
255 AM CDT Sun Jul 20 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... 

Northerly winds in the wake of a cold front will become decrease
today as high pressure of 30.1 inches slides across the Upper
Great Lakes. Winds will shift to the east on Monday as the high 
moves into Ontario.

Winds will increase to around 20 knots and become southeast on 
Tuesday as low pressure of 29.5 inches approaches from the Central
Plains. There are chances for storms Wednesday through Friday 
along a frontal boundary that sets up across the northern part of 
Lake Michigan. South to southwest winds will remain elevated 
Wednesday and Thursday. A low pressure trough around 29.8 inches 
will drop through the area Thursday night into Friday. 


LMZ080-669-671-673-675-777-779-870-872-874-876-878-201515-
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-
255 AM CDT Sun Jul 20 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TODAY...North winds 10 to 20 kt. Waves 3 to 5 ft subsiding to
2 to 4 ft. 
.TONIGHT...North winds 10 to 20 kt becoming east. Waves 2 to
4 ft. 
.MONDAY...East winds 10 to 20 kt becoming northeast 10 to 15 kt.
Waves 2 to 4 ft subsiding to 1 to 3 ft. 
.MONDAY NIGHT...Northeast winds 10 to 15 kt becoming southeast
10 to 20 kt. Waves 1 to 2 ft building to 2 to 4 ft. 
.TUESDAY...Southeast winds 10 to 20 kt. Waves 3 to 5 ft. 
.TUESDAY NIGHT...South winds 10 to 15 kt increasing to 10 to
20 kt. Waves 2 to 4 ft. 
.WEDNESDAY...South winds 15 to 25 kt. Waves 3 to 5 ft. 
.THURSDAY...Southwest winds 10 to 20 kt. Waves 2 to 4 ft.  

$$