342  
FZUS53 KGRB 210754  
NSHGRB  
 
NEARSHORE MARINE FORECAST  
NATIONAL WEATHER SERVICE GREEN BAY WI  
254 AM CDT SUN SEP 21 2025  
 
FOR WATERS WITHIN FIVE NAUTICAL MILES OF THE SHORE ON LAKE MICHIGAN  
 
LMZ521-522-211300-  
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-  
254 AM CDT SUN SEP 21 2025  
   
OVERNIGHT
 
S WIND 5 TO 10 KTS. PATCHY FOG. A CHANCE OF LIGHT  
SHOWERS AND THUNDERSTORMS. WAVES 2 FT OR LESS.    
TODAY
 
S WIND 5 TO 10 KTS. PATCHY FOG IN THE MORNING. A CHANCE  
OF LIGHT SHOWERS AND A SLIGHT CHANCE OF THUNDERSTORMS. WAVES 2 FT  
OR LESS.    
TONIGHT
 
S WIND AROUND 5 KTS VEERING SW AFTER MIDNIGHT. PATCHY  
FOG AFTER MIDNIGHT. . WAVES 2 FT OR LESS.    
MONDAY
 
SW WIND AROUND 5 KTS BACKING S IN THE AFTERNOON. A  
CHANCE OF LIGHT SHOWERS. A CHANCE OF THUNDERSTORMS IN THE  
AFTERNOON. WAVES 2 FT OR LESS.  
 

 
 
LMZ541-211300-  
ROCK ISLAND PASSAGE TO STURGEON BAY WI-  
254 AM CDT SUN SEP 21 2025  
   
OVERNIGHT
 
S WIND 5 TO 10 KTS. LIGHT SHOWERS LIKELY AND A  
CHANCE OF THUNDERSTORMS. WAVES 1 TO 3 FT.    
TODAY
 
S WIND 5 TO 10 KTS. A CHANCE OF LIGHT SHOWERS AND A  
SLIGHT CHANCE OF THUNDERSTORMS. WAVES 1 TO 3 FT.    
TONIGHT
 
S WIND AROUND 5 KTS VEERING SW AFTER MIDNIGHT. PATCHY  
FOG. . WAVES 2 FT OR LESS.    
MONDAY
 
SW WIND AROUND 5 KTS BACKING S IN THE AFTERNOON. A  
CHANCE OF LIGHT SHOWERS. WAVES 2 FT OR LESS.  
 

 
 
LMZ542-543-211300-  
STURGEON BAY TO TWO RIVERS WI-TWO RIVERS TO SHEBOYGAN WI-  
254 AM CDT SUN SEP 21 2025  
   
OVERNIGHT
 
S WIND 5 TO 10 KTS. PATCHY FOG. A CHANCE OF LIGHT  
SHOWERS AND A SLIGHT CHANCE OF THUNDERSTORMS. WAVES 1 TO 3 FT.    
TODAY
 
S WIND 5 TO 10 KTS. PATCHY FOG IN THE MORNING. A CHANCE  
OF LIGHT SHOWERS AND THUNDERSTORMS. WAVES 1 TO 3 FT.    
TONIGHT
 
S WIND 5 TO 10 KTS VEERING W AFTER MIDNIGHT. PATCHY  
FOG. . WAVES 2 FT OR LESS.    
MONDAY
 
SW WIND AROUND 5 KTS BACKING S IN THE AFTERNOON. A  
CHANCE OF SHOWERS. WAVES 2 FT OR LESS.  
 

 
 
SEE LAKE MICHIGAN OPEN LAKE FORECAST FOR TUESDAY THROUGH THURSDAY.  
 
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