540  
FZUS53 KLOT 202002  
NSHLOT  
 
NEARSHORE MARINE FORECAST  
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL  
302 PM CDT SUN APR 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>742-210345-  
WINTHROP HARBOR TO WILMETTE HARBOR IL-  
WILMETTE HARBOR TO NORTHERLY ISLAND IL-  
NORTHERLY ISLAND TO CALUMET HARBOR IL-  
302 PM CDT SUN APR 20 2025  
 
...SMALL CRAFT ADVISORY IN EFFECT FROM 7 PM THIS EVENING TO 1 AM  
CDT MONDAY...  
...GALE WARNING IN EFFECT FROM 1 AM CDT MONDAY THROUGH MONDAY  
EVENING...  
   
TONIGHT
 
EAST WINDS 20 TO 25 KT BECOMING SOUTH TO 30 KT WITH A  
FEW GUSTS TO 35 KT LATE. SHOWERS LIKELY AND SLIGHT CHANCE OF  
THUNDERSTORMS IN THE EVENING, THEN SHOWERS AND A CHANCE OF  
THUNDERSTORMS AFTER MIDNIGHT. WAVES 3 TO 5 FT BUILDING TO 6 TO 9  
FT OCCASIONALLY TO 12 FT.    
MONDAY
 
SOUTHWEST GALES TO 35 KT BECOMING WEST IN THE  
AFTERNOON. CHANCE OF SHOWERS IN THE MORNING. WAVES 4 TO 7 FT  
OCCASIONALLY TO 9 FT SUBSIDING TO 2 TO 4 FT.    
MONDAY NIGHT
 
WEST WINDS TO 30 KT DIMINISHING TO 10 TO 15 KT.  
MOSTLY CLEAR. WAVES 1 TO 3 FT.    
TUESDAY
 
NORTH WINDS 5 TO 10 KT BECOMING EAST 10 TO 15 KT IN  
THE AFTERNOON. SLIGHT CHANCE OF SHOWERS IN THE AFTERNOON. WAVES  
1 FT OR LESS.  
 

 
 
LMZ743>745-210345-  
CALUMET HARBOR IL TO GARY IN-GARY TO BURNS HARBOR IN-  
BURNS HARBOR TO MICHIGAN CITY IN-  
302 PM CDT SUN APR 20 2025  
 
...SMALL CRAFT ADVISORY IN EFFECT FROM 7 PM THIS EVENING TO 1 AM  
CDT MONDAY...  
...GALE WARNING IN EFFECT FROM 1 AM CDT MONDAY THROUGH MONDAY  
EVENING...  
   
TONIGHT
 
EAST WINDS 20 TO 25 KT BECOMING SOUTH TO 30 KT WITH A  
FEW GUSTS TO 35 KT LATE. CHANCE OF SHOWERS IN THE EVENING, THEN  
SHOWERS AND A CHANCE OF THUNDERSTORMS AFTER MIDNIGHT. WAVES 3 TO 5  
FT SUBSIDING TO 2 TO 4 FT.    
MONDAY
 
SOUTHWEST GALES TO 35 KT BECOMING WEST IN THE  
AFTERNOON. CHANCE OF SHOWERS IN THE MORNING. WAVES 3 TO 5 FT.    
MONDAY NIGHT
 
WEST WINDS 15 TO 25 KT DIMINISHING TO 10 TO  
15 KT. PARTLY CLOUDY IN THE EVENING THEN CLEARING. WAVES 2 TO  
4 FT SUBSIDING TO 1 TO 3 FT.    
TUESDAY
 
NORTHWEST WINDS 5 TO 10 KT BECOMING EAST IN THE  
AFTERNOON. MOSTLY SUNNY IN THE MORNING, THEN BECOMING PARTLY  
CLOUDY. WAVES AROUND 1 FT.  
 

 
 
DOOM  
 
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