514  
WHUS73 KLOT 161048  
MWWLOT  
 
URGENT - MARINE WEATHER MESSAGE  
NATIONAL WEATHER SERVICE CHICAGO IL  
548 AM CDT THU JUL 16 2026  
 
LMZ740>745-161800-  
/O.NEW.KLOT.MS.Y.0001.260716T1048Z-260716T1800Z/  
WINTHROP HARBOR TO WILMETTE HARBOR IL-  
WILMETTE HARBOR TO NORTHERLY ISLAND IL-  
NORTHERLY ISLAND TO CALUMET HARBOR IL-  
CALUMET HARBOR IL TO GARY IN-GARY TO BURNS HARBOR IN-  
BURNS HARBOR TO MICHIGAN CITY IN-  
548 AM CDT THU JUL 16 2026  
   
..DENSE SMOKE ADVISORY IN EFFECT UNTIL 1 PM CDT THIS AFTERNOON
 
 
* WHAT...DENSE SMOKE WILL REDUCE VISIBILITY 1 NM OR LESS AT TIMES.  
 
* WHERE...WINTHROP HARBOR TO WILMETTE HARBOR IL, WILMETTE HARBOR  
TO NORTHERLY ISLAND IL, NORTHERLY ISLAND TO CALUMET HARBOR IL,  
CALUMET HARBOR IL TO GARY IN, GARY TO BURNS HARBOR IN AND  
BURNS HARBOR TO MICHIGAN CITY IN.  
 
* WHEN...UNTIL 1 PM CDT THIS AFTERNOON.  
 
* IMPACTS...LOW VISIBILITY WILL MAKE NAVIGATION DIFFICULT.  
 
* ADDITIONAL DETAILS...LOW VISIBILITIES IN SMOKE MAY CONTINUE  
THROUGH THE AFTERNOON AND INTO THE EVENING.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
IF YOU MUST NAVIGATE, PROCEED WITH CAUTION. USE PROPER FOG  
SIGNALS. MAKE SURE ALL RUNNING LIGHTS ARE ON. REMEMBER TO USE  
YOUR RADAR AND COMPASS.  
 

 
 

 
 
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