651  
WHUS73 KGRB 171523  
MWWGRB  
 
URGENT - MARINE WEATHER MESSAGE  
NATIONAL WEATHER SERVICE GREEN BAY WI  
1023 AM CDT FRI APR 17 2026  
 
LMZ521-172330-  
/O.EXT.KGRB.MF.Y.0004.000000T0000Z-260418T0900Z/  
/O.CON.KGRB.SC.Y.0043.260417T2000Z-260418T0900Z/  
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-  
1023 AM CDT FRI APR 17 2026  
   
..DENSE FOG ADVISORY NOW IN EFFECT UNTIL 4 AM CDT SATURDAY
 
 
...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 3 PM THIS  
AFTERNOON TO 4 AM CDT SATURDAY...  
 
* WHAT...FOR THE DENSE FOG ADVISORY, DENSE FOG WILL REDUCE  
VISIBILITY TO 1 NM OR LESS. FOR THE SMALL CRAFT ADVISORY, SOUTH  
WINDS 10 TO 20 KTS WITH GUSTS UP TO 25 KTS AND WAVES 2 TO 4 FT  
EXPECTED.  
 
* WHERE...CENTRAL BAY OF GREEN BAY.  
 
* WHEN...FOR THE DENSE FOG ADVISORY, UNTIL 4 AM CDT SATURDAY.  
FOR THE SMALL CRAFT ADVISORY, FROM 3 PM THIS AFTERNOON TO 4 AM  
CDT SATURDAY.  
 
* IMPACTS...CONDITIONS WILL BE HAZARDOUS TO SMALL CRAFT. LOW  
VISIBILITY WILL MAKE NAVIGATION DIFFICULT.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
INEXPERIENCED MARINERS, ESPECIALLY THOSE OPERATING SMALLER  
VESSELS, SHOULD AVOID NAVIGATING IN HAZARDOUS CONDITIONS.  
 
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.  
 

 
 

 
 
LMZ541>543-172330-  
/O.EXT.KGRB.MF.Y.0004.000000T0000Z-260418T0900Z/  
/O.CON.KGRB.SC.Y.0043.260417T2000Z-260418T1500Z/  
ROCK ISLAND PASSAGE TO STURGEON BAY WI-  
STURGEON BAY TO TWO RIVERS WI-TWO RIVERS TO SHEBOYGAN WI-  
1023 AM CDT FRI APR 17 2026  
   
..DENSE FOG ADVISORY NOW IN EFFECT UNTIL 4 AM CDT SATURDAY
 
 
...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 3 PM THIS  
AFTERNOON TO 10 AM CDT SATURDAY...  
 
* WHAT...FOR THE DENSE FOG ADVISORY, DENSE FOG WILL REDUCE  
VISIBILITY TO 1/4 NM OR LESS. FOR THE SMALL CRAFT ADVISORY,  
SOUTHWEST WINDS 15 TO 20 KTS WITH GUSTS UP TO 30 KTS AND WAVES  
4 TO 7 FT EXPECTED.  
 
* WHERE...LAKE MICHIGAN NEARSHORE WATERS FROM WASHINGTON ISLAND  
TO SHEBOYGAN.  
 
* WHEN...FOR THE DENSE FOG ADVISORY, UNTIL 4 AM CDT SATURDAY.  
FOR THE SMALL CRAFT ADVISORY, FROM 3 PM THIS AFTERNOON TO 10  
AM CDT SATURDAY.  
 
* IMPACTS...CONDITIONS WILL BE HAZARDOUS TO SMALL CRAFT. LOW  
VISIBILITY WILL MAKE NAVIGATION DIFFICULT.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
INEXPERIENCED MARINERS, ESPECIALLY THOSE OPERATING SMALLER  
VESSELS, SHOULD AVOID NAVIGATING IN HAZARDOUS CONDITIONS.  
 
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.  
 

 
 

 
 
LMZ522-172330-  
/O.CON.KGRB.SC.Y.0043.260417T2000Z-260418T0900Z/  
GREEN BAY SOUTH OF LINE FROM OCONTO WI TO LITTLE STURGEON BAY WI-  
1023 AM CDT FRI APR 17 2026  
 
...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 3 PM THIS  
AFTERNOON TO 4 AM CDT SATURDAY...  
 
* WHAT...SOUTH WINDS 10 TO 20 KTS WITH GUSTS UP TO 25 KTS AND  
WAVES 2 TO 4 FT EXPECTED.  
 
* WHERE...SOUTHERN BAY OF GREEN BAY.  
 
* WHEN...FROM 3 PM THIS AFTERNOON TO 4 AM CDT SATURDAY.  
 
* IMPACTS...CONDITIONS WILL BE HAZARDOUS TO SMALL CRAFT.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
INEXPERIENCED MARINERS, ESPECIALLY THOSE OPERATING SMALLER  
VESSELS, SHOULD AVOID NAVIGATING IN HAZARDOUS CONDITIONS.  
 

 
 

 
KIECKBUSCH  
 
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