243  
WHUS53 KLOT 131237  
SMWLOT  
LMZ741>745-779-131315-  
/O.NEW.KLOT.MA.W.0045.250913T1237Z-250913T1315Z/  
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED  
SPECIAL MARINE WARNING  
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE  
737 AM CDT SAT SEP 13 2025  
 
THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A  
 
* SPECIAL MARINE WARNING FOR...  
 
NEARSHORE WATERS FROM WILMETTE HARBOR TO CALUMET HARBOR...  
NEARSHORE WATERS FROM CALUMET HARBOR TO MICHIGAN CITY...  
OPEN WATERS FROM WILMETTE HARBOR TO MICHIGAN CITY OUT TO MID  
LAKE...  
 
* UNTIL 815 AM CDT.  
 
* AT 736 AM CDT, STRONG THUNDERSTORMS WERE LOCATED ALONG A LINE  
EXTENDING FROM 7 NM NORTHEAST OF HARRISON-DEVER CRIB TO NEAR MIDWAY  
AIRPORT, MOVING SOUTHEAST AT 30 KNOTS.  
 
HAZARD...WIND GUSTS TO 40 KNOTS.  
 
SOURCE...RADAR.  
 
IMPACT...SMALL CRAFT COULD BE DAMAGED IN BRIEFLY HIGHER WINDS AND  
SUDDENLY HIGHER WAVES.  
 
* LOCATIONS IMPACTED INCLUDE...  
HARRISON-DEVER CRIB, BURNHAM HARBOR, HAMMOND MARINA, JACKSON PARK  
HARBOR, 31ST STREET HARBOR, MONROE HARBOR, BURNS HARBOR, CALUMET  
HARBOR, MARINA SHORES AT DUNE HARBOR, 59TH STREET MARINA, INDIANA  
HARBOR, AND DIVERSY HARBOR.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
MOVE TO SAFE HARBOR IMMEDIATELY AS GUSTY WINDS AND HIGH WAVES ARE  
EXPECTED.  
 

 
 
LAT...LON 4162 8733 4164 8742 4165 8744 4167 8742  
4169 8750 4175 8753 4179 8758 4180 8758  
4188 8762 4189 8760 4192 8763 4201 8745  
4166 8708 4164 8712 4165 8714 4163 8716  
4162 8732 4161 8732  
TIME...MOT...LOC 1236Z 328DEG 30KT 4199 8743 4178 8782  
 
HAIL...0.00IN  
WIND...40KTS  
 

 
 
DOOM  
 
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