548  
WHUS73 KGRB 271449  
MWWGRB  
 
URGENT - MARINE WEATHER MESSAGE  
NATIONAL WEATHER SERVICE GREEN BAY WI  
949 AM CDT SUN APR 27 2025  
 
LMZ541>543-280000-  
/O.CON.KGRB.SC.Y.0047.250428T1000Z-250429T2100Z/  
ROCK ISLAND PASSAGE TO STURGEON BAY WI-  
STURGEON BAY TO TWO RIVERS WI-TWO RIVERS TO SHEBOYGAN WI-  
949 AM CDT SUN APR 27 2025  
 
...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 5 AM MONDAY TO  
4 PM CDT TUESDAY...  
 
* WHAT...SOUTH TO SOUTHWEST WINDS 15 TO 25 KTS WITH GUSTS TO  
AROUND 30 KTS, BECOMING NORTHWEST TUESDAY MORNING. A FEW GUSTS  
TO NEAR GALE FORCE LATE MONDAY AFTERNOON AND MONDAY NIGHT.  
WAVES BUILDING TO 6 TO 11 FT.  
 
* WHERE...LAKE MICHIGAN NEARSHORE WATERS FROM WASHINGTON ISLAND  
TO SHEBOYGAN.  
 
* WHEN...FROM 5 AM MONDAY TO 4 PM CDT TUESDAY.  
 
* IMPACTS...CONDITIONS WILL BE HAZARDOUS TO SMALL CRAFT.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
INEXPERIENCED MARINERS, ESPECIALLY THOSE OPERATING SMALLER  
VESSELS, SHOULD AVOID NAVIGATING IN HAZARDOUS CONDITIONS.  
 

 
 

 
 
LMZ521-522-280000-  
/O.CON.KGRB.SC.Y.0047.250428T1500Z-250429T2100Z/  
GREEN BAY SOUTH OF LINE FROM CEDAR RIVER TO ROCK ISLAND PASSAGE  
AND NORTH OF A LINE FROM OCONTO WI TO LITTLE STURGEON BAY WI-  
GREEN BAY SOUTH OF LINE FROM OCONTO WI TO LITTLE STURGEON BAY WI-  
949 AM CDT SUN APR 27 2025  
 
...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 10 AM MONDAY TO  
4 PM CDT TUESDAY...  
 
* WHAT...SOUTH TO SOUTHWEST WINDS 15 TO 25 KTS WITH GUSTS TO  
AROUND 30 KTS, BECOMING NORTHWEST TUESDAY MORNING. WAVES  
BUILDING TO 3 TO 5 FT.  
 
* WHERE...CENTRAL AND SOUTHERN BAY OF GREEN BAY.  
 
* WHEN...FROM 10 AM MONDAY TO 4 PM CDT TUESDAY.  
 
* IMPACTS...CONDITIONS WILL BE HAZARDOUS TO SMALL CRAFT.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
INEXPERIENCED MARINERS, ESPECIALLY THOSE OPERATING SMALLER  
VESSELS, SHOULD AVOID NAVIGATING IN HAZARDOUS CONDITIONS.  
 

 
 

 
 
JLA  
 
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