656  
FZUS53 KLOT 281500  
NSHLOT  
 
NEARSHORE MARINE FORECAST  
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL  
1000 AM CDT THU AUG 28 2025  
 
FOR WATERS WITHIN 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 WAVES, ALONG WITH THE  
AVERAGE HEIGHT OF THE HIGHEST 10 PERCENT OF THE WAVES WHICH WILL  
OCCASIONALLY BE ENCOUNTERED.  
 
LMZ740>742-282115-  
WINTHROP HARBOR TO WILMETTE HARBOR IL-  
WILMETTE HARBOR TO NORTHERLY ISLAND IL-  
NORTHERLY ISLAND TO CALUMET HARBOR IL-  
1000 AM CDT THU AUG 28 2025  
 
...SMALL CRAFT ADVISORY IN EFFECT FROM 4 PM CDT THIS AFTERNOON  
THROUGH FRIDAY AFTERNOON...  
   
REST OF TODAY
 
NORTHWEST WINDS 10 TO 20 KT BECOMING NORTH AND  
INCREASING TO 20 TO 25 KT THIS AFTERNOON. A CHANCE OF SHOWERS AND  
THUNDERSTORMS IN THE AFTERNOON WITH A SLIGHT CHANCE OF WATERSPOUTS.  
WAVES 1 TO 3 FT THROUGH EARLY AFTERNOON THEN QUICKLY BUILDING TO  
4 TO 7 FT OCCASIONALLY TO 9 FT.   
TONIGHT
 
NORTHEAST WINDS 20 TO 25 KT GRADUALLY DIMINISHING TO 10  
TO 20 KT OVERNIGHT. MOSTLY CLEAR. WAVES 5 TO 8 FT OCCASIONALLY TO  
10 FT.    
FRIDAY
 
NORTHEAST WINDS 10 TO 15 KT. PARTLY CLOUDY. WAVES 4 TO  
7 FT OCCASIONALLY TO 9 FT SUBSIDING TO 2 TO 4 FT BY LATE  
AFTERNOON.   
FRIDAY NIGHT
 
NORTHEAST WINDS 5 TO 10 KT. PARTLY CLOUDY. WAVES  
1 TO 3 FT.  
 

 
 
LMZ743>745-282115-  
CALUMET HARBOR IL TO GARY IN-GARY TO BURNS HARBOR IN-  
BURNS HARBOR TO MICHIGAN CITY IN-  
1000 AM CDT THU AUG 28 2025  
 
...SMALL CRAFT ADVISORY IN EFFECT FROM 4 PM CDT THIS AFTERNOON  
THROUGH FRIDAY MORNING...  
   
REST OF TODAY
 
SOUTHWEST WINDS 10 TO 20 KT BECOMING WEST LATE  
THIS MORNING AND THEN NORTH THIS AFTERNOON AND INCREASING TO 20  
TO 25 KT LATE. A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS IN THE  
AFTERNOON WITH A SLIGHT CHANCE OF WATERSPOUTS. SLIGHT CHANCE OF  
WATERSPOUTS IN THE AFTERNOON. WAVES 1 TO 3 FT THROUGH MID  
AFTERNOON THEN BUILDING TO 3 TO 5 FT LATE.    
TONIGHT
 
NORTH WINDS 20 TO 25 KT BECOMING NORTHEAST OVERNIGHT.  
MOSTLY CLEAR. WAVES BUILDING TO 5 TO 8 FT OCCASIONALLY TO 10 FT  
AND THEN SUBSIDING TO 4 TO 6 FT OCCASIONALLY TO 8 FT LATE.   
FRIDAY
 
NORTHEAST WINDS 10 TO 15 KT. PARTLY CLOUDY. WAVES 3 TO  
6 FT OCCASIONALLY TO 8 FT SUBSIDING TO 2 TO 4 FT BY LATE  
AFTERNOON.   
FRIDAY NIGHT
 
NORTHEAST WINDS 10 TO 15 KT BECOMING EAST 5 TO  
10 KT OVERNIGHT. MOSTLY CLEAR. WAVES 1 TO 2 FT.  
 

 
 
RC  
 
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