921  
FZUS53 KLOT 202100  
NSHLOT  
 
NEARSHORE MARINE FORECAST  
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL  
300 PM CST THU FEB 20 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>742-210415-  
WINTHROP HARBOR TO WILMETTE HARBOR IL-  
WILMETTE HARBOR TO NORTHERLY ISLAND IL-  
NORTHERLY ISLAND TO CALUMET HARBOR IL-  
300 PM CST THU FEB 20 2025  
   
TONIGHT
 
NORTHWEST WINDS 10 TO 20 KT DIMINISHING TO 5 TO 10 KT  
LATE. PARTLY CLOUDY. WAVES 1 TO 3 FT.    
FRIDAY
 
WEST WINDS AROUND 10 KT BECOMING SOUTHWEST IN THE  
AFTERNOON. MOSTLY SUNNY. WAVES 1 TO 2 FT.    
FRIDAY NIGHT
 
SOUTHWEST WINDS 10 TO 15 KT. CLEAR. WAVES AROUND  
1 FT.    
SATURDAY
 
SOUTHWEST WINDS 10 TO 20 KT INCREASING TO 15 TO  
25 KT. MOSTLY SUNNY. WAVES 1 TO 2 FT.  
 
WAVE HEIGHTS ARE FOR ICE FREE AREAS.  
 

 
 
LMZ743>745-210415-  
CALUMET HARBOR IL TO GARY IN-GARY TO BURNS HARBOR IN-  
BURNS HARBOR TO MICHIGAN CITY IN-  
300 PM CST THU FEB 20 2025  
   
TONIGHT
 
NORTHWEST WINDS 15 TO 20 KT BECOMING WEST 10 TO 15 KT.  
PARTLY CLOUDY.    
FRIDAY
 
WEST WINDS AROUND 10 KT BECOMING SOUTHWEST 5 TO 10 KT  
IN THE AFTERNOON. MOSTLY SUNNY.    
FRIDAY NIGHT
 
SOUTHWEST WINDS AROUND 10 KT. CLEAR.    
SATURDAY
 
SOUTHWEST WINDS 10 TO 20 KT. MOSTLY SUNNY.  
 
WAVES OMITTED DUE TO EXTENSIVE ICE COVERAGE.  
 

 
 
RC  
 
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