643  
FZUS53 KGRB 180524  
NSHGRB  
 
NEARSHORE MARINE FORECAST  
NATIONAL WEATHER SERVICE GREEN BAY WI  
1224 AM CDT SAT APR 18 2026  
 
FOR WATERS WITHIN FIVE NAUTICAL MILES OF SHORE ON LAKE MICHIGAN  
 
LMZ522-181000-  
GREEN BAY SOUTH OF LINE FROM OCONTO WI TO LITTLE STURGEON BAY WI-  
1224 AM CDT SAT APR 18 2026  
 
...SMALL CRAFT ADVISORY IN EFFECT UNTIL 4 AM CDT EARLY THIS  
MORNING...  
   
REST OF THE NIGHT  
SW WIND 10 TO 20 KTS VEERING NW AFTER  
MIDNIGHT. WAVES 1 TO 3 FT. PATCHY FOG. A CHANCE OF THUNDERSTORMS  
LATE IN THE EVENING. RAIN SHOWERS LIKELY.    
SATURDAY  
W WIND 15 TO 25 KTS. WAVES 1 TO 3 FT. A CHANCE OF  
SPRINKLES IN THE MORNING. A SLIGHT CHANCE OF SNOW SHOWERS. A  
SLIGHT CHANCE OF SHOWERS IN THE AFTERNOON. A SMALL CRAFT ADVISORY  
MAY BE NEEDED.    
SATURDAY NIGHT  
W WIND 10 TO 20 KTS. WAVES 1 TO 3 FT. MOSTLY  
CLEAR.    
SUNDAY  
NW WIND 10 TO 15 KTS. WAVES 2 FT OR LESS. A CHANCE OF  
FLURRIES IN THE MORNING. A CHANCE OF SPRINKLES.  
 
 
 
LMZ521-181000-  
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-  
1224 AM CDT SAT APR 18 2026  
 
...DENSE FOG ADVISORY IN EFFECT UNTIL 4 AM CDT EARLY THIS  
MORNING...  
...SMALL CRAFT ADVISORY IN EFFECT UNTIL 4 AM CDT EARLY THIS  
MORNING...  
   
REST OF THE NIGHT  
SW WIND 10 TO 15 KTS VEERING NW 10 TO 20 KTS  
AFTER MIDNIGHT. WAVES 2 TO 4 FT. PATCHY DENSE FOG. A CHANCE OF  
THUNDERSTORMS LATE IN THE EVENING. RAIN SHOWERS LIKELY.    
SATURDAY  
W WIND 10 TO 15 KTS. WAVES 1 TO 3 FT. A SLIGHT CHANCE  
OF RAIN AND SNOW SHOWERS.    
SATURDAY NIGHT  
W WIND 10 TO 15 KTS. WAVES 1 TO 3 FT. PARTLY  
CLOUDY.    
SUNDAY  
NW WIND 10 TO 15 KTS. WAVES 2 FT OR LESS. PARTLY  
CLOUDY.  
 
 
 
LMZ541-181000-  
ROCK ISLAND PASSAGE TO STURGEON BAY WI-  
1224 AM CDT SAT APR 18 2026  
 
...DENSE FOG ADVISORY IN EFFECT UNTIL 4 AM CDT EARLY THIS  
MORNING...   
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 AM CDT THIS MORNING  
 
   
REST OF THE NIGHT  
S WIND 15 TO 25 KTS VEERING NW AFTER  
MIDNIGHT. WAVES 4 TO 7 FT. AREAS OF DENSE FOG LATE IN THE  
EVENING. PATCHY DENSE FOG AFTER MIDNIGHT. SHOWERS LIKELY AND A  
CHANCE OF THUNDERSTORMS.    
SATURDAY  
W WIND 10 TO 15 KTS. WAVES 3 TO 5 FT SUBSIDING TO  
1 TO 3 FT IN THE AFTERNOON. A SLIGHT CHANCE OF RAIN AND SNOW  
SHOWERS.    
SATURDAY NIGHT  
W WIND 10 TO 15 KTS. WAVES 1 TO 3 FT. PARTLY  
CLOUDY.    
SUNDAY  
NW WIND 10 TO 15 KTS VEERING N EARLY IN THE AFTERNOON.  
WAVES 2 FT OR LESS. PARTLY SUNNY.  
 
 
 
LMZ542-543-181000-  
STURGEON BAY TO TWO RIVERS WI-TWO RIVERS TO SHEBOYGAN WI-  
1224 AM CDT SAT APR 18 2026  
 
...DENSE FOG ADVISORY IN EFFECT UNTIL 4 AM CDT EARLY THIS  
MORNING...   
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 AM CDT THIS MORNING  
 
   
REST OF THE NIGHT  
S WIND 15 TO 25 KTS VEERING W AFTER  
MIDNIGHT. WAVES 4 TO 7 FT. PATCHY DENSE FOG. A SLIGHT CHANCE OF  
THUNDERSTORMS LATE IN THE EVENING. RAIN SHOWERS LIKELY.    
SATURDAY  
W WIND 15 TO 25 KTS. WAVES 2 TO 4 FT SUBSIDING TO  
1 TO 3 FT IN THE AFTERNOON. A SLIGHT CHANCE OF RAIN AND SNOW  
SHOWERS.    
SATURDAY NIGHT  
W WIND 15 TO 25 KTS DECREASING TO 10 TO 15 KTS  
IN THE LATE EVENING AND OVERNIGHT. WAVES 1 TO 3 FT. MOSTLY CLEAR.  
A SMALL CRAFT ADVISORY MAY BE NEEDED.    
SUNDAY  
NW WIND 10 TO 15 KTS VEERING N EARLY IN THE AFTERNOON.  
WAVES 2 FT OR LESS. A CHANCE OF FLURRIES IN THE MORNING. A CHANCE  
OF SPRINKLES.  
 
 
 
SEE LAKE MICHIGAN OPEN LAKE FORECAST FOR MONDAY THROUGH WEDNESDAY.  
 
WAVE HEIGHT FORECAST IS FOR ICE FREE AREAS.  
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