513  
FZUS53 KLOT 211505  
NSHLOT  
 
NEARSHORE MARINE FORECAST  
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL  
905 AM CST FRI FEB 21 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>742-212215-  
WINTHROP HARBOR TO WILMETTE HARBOR IL-  
WILMETTE HARBOR TO NORTHERLY ISLAND IL-  
NORTHERLY ISLAND TO CALUMET HARBOR IL-  
905 AM CST FRI FEB 21 2025  
   
REST OF TODAY
 
WEST WINDS 10 TO 15 KT BECOMING SOUTHWEST.  
SUNNY. WAVES 1 TO 2 FT.    
TONIGHT
 
SOUTHWEST WINDS 10 TO 20 KT. CLEAR. WAVES 1 TO 2 FT.    
SATURDAY
 
SOUTHWEST WINDS 15 TO 25 KT. MOSTLY SUNNY. WAVES 1 TO  
2 FT.    
SATURDAY NIGHT
 
SOUTHWEST WINDS 15 TO 20 KT DIMINISHING TO  
10 TO 15 KT. PARTLY CLOUDY IN THE EVENING, THEN BECOMING MOSTLY  
CLOUDY. WAVES 1 TO 2 FT.  
 
WAVE HEIGHTS ARE FOR ICE FREE AREAS.  
 

 
 
LMZ743>745-212215-  
CALUMET HARBOR IL TO GARY IN-GARY TO BURNS HARBOR IN-  
BURNS HARBOR TO MICHIGAN CITY IN-  
905 AM CST FRI FEB 21 2025  
   
REST OF TODAY
 
WEST WINDS 10 TO 15 KT BECOMING SOUTHWEST.  
SUNNY.   
TONIGHT
 
SOUTHWEST WINDS 10 TO 15 KT. CLEAR.   
SATURDAY
 
SOUTHWEST WINDS 10 TO 20 KT. MOSTLY SUNNY.    
SATURDAY NIGHT
 
SOUTHWEST WINDS 10 TO 15 KT. PARTLY CLOUDY IN  
THE EVENING, THEN BECOMING MOSTLY CLOUDY.  
 
WAVES OMITTED DUE TO EXTENSIVE ICE COVERAGE  
 

 
KJB  
 
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