613  
FZUS53 KDLH 201948  
NSHDLH  
 
NEARSHORE MARINE FORECAST  
NATIONAL WEATHER SERVICE DULUTH MN  
248 PM CDT WED AUG 20 2025  
 
FOR WATERS WITHIN FIVE NAUTICAL MILES OF SHORE ON LAKE SUPERIOR.  
 
WAVES ARE THE SIGNIFICANT WAVE HEIGHT - THE AVERAGE OF THE HIGHEST  
1/3 OF THE WAVE SPECTRUM. OCCASIONAL WAVE HEIGHT IS THE AVERAGE OF  
THE HIGHEST 1/10 OF THE WAVE SPECTRUM.  
 
LSZ140-141-210415-  
GRAND PORTAGE TO GRAND MARAIS MN-  
GRAND MARAIS TO TACONITE HARBOR MN-  
248 PM CDT WED AUG 20 2025  
   
TONIGHT  
SOUTHWEST WIND 5 TO 10 KNOTS BECOMING WEST IN THE LATE  
EVENING AND OVERNIGHT. AREAS OF FOG. WAVES 1 FOOT OR LESS.    
THURSDAY  
SOUTHWEST WIND 5 TO 10 KNOTS BECOMING SOUTH LATE IN  
THE AFTERNOON. AREAS OF FOG IN THE MORNING. WAVES 1 FOOT OR LESS.   
THURSDAY NIGHT  
SOUTH WIND 5 TO 10 KNOTS BECOMING SOUTHWEST  
AFTER MIDNIGHT. CHANCE OF SHOWERS AND SLIGHT CHANCE OF  
THUNDERSTORMS AFTER MIDNIGHT. WAVES 1 FOOT OR LESS.    
FRIDAY  
SOUTHWEST WIND 10 TO 15 KNOTS. GUSTS UP TO 20 KNOTS IN  
THE LATE MORNING AND AFTERNOON. CHANCE OF SHOWERS AND SLIGHT  
CHANCE OF THUNDERSTORMS. WAVES 1 TO 3 FEET.  
 
 
 
LSZ142-143-210415-  
TACONITE HARBOR TO SILVER BAY HARBOR MN-  
SILVER BAY HARBOR TO TWO HARBORS MN-  
248 PM CDT WED AUG 20 2025  
   
TONIGHT  
EAST WIND 5 KNOTS BECOMING NORTHEAST LATE IN THE  
EVENING, THEN BECOMING VARIABLE 10 KNOTS OR LESS AFTER MIDNIGHT.  
PATCHY FOG IN THE EVENING, THEN AREAS OF DENSE FOG AFTER  
MIDNIGHT. WAVES 1 FOOT OR LESS.    
THURSDAY  
VARIABLE WINDS 10 KNOTS OR LESS BECOMING SOUTHEAST  
5 KNOTS IN THE AFTERNOON. AREAS OF DENSE FOG IN THE MORNING.  
WAVES 1 FOOT OR LESS.    
THURSDAY NIGHT  
SOUTHEAST WIND 5 KNOTS BECOMING SOUTHWEST AFTER  
MIDNIGHT. CHANCE OF SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS  
AFTER MIDNIGHT. WAVES 1 FOOT OR LESS.    
FRIDAY  
SOUTHWEST WIND 5 TO 10 KNOTS. CHANCE OF SHOWERS AND  
SLIGHT CHANCE OF THUNDERSTORMS. WAVES 1 FOOT OR LESS.  
 
 
 
LSZ144-145-210415-  
TWO HARBORS TO DULUTH MN-DULUTH MN TO PORT WING WI-  
248 PM CDT WED AUG 20 2025  
   
TONIGHT  
NORTHEAST WIND 5 KNOTS UNTIL EARLY MORNING BECOMING  
VARIABLE 10 KNOTS OR LESS. PATCHY FOG LATE IN THE EVENING. AREAS  
OF DENSE FOG AFTER MIDNIGHT. WAVES 1 FOOT OR LESS.    
THURSDAY  
EAST WIND 5 TO 10 KNOTS. AREAS OF DENSE FOG IN THE  
MORNING. WAVES 1 FOOT OR LESS.    
THURSDAY NIGHT  
SOUTHEAST WIND 5 TO 10 KNOTS BECOMING SOUTHWEST  
EARLY IN THE MORNING. CHANCE OF SHOWERS AND SLIGHT CHANCE OF  
THUNDERSTORMS AFTER MIDNIGHT. WAVES 1 FOOT OR LESS.    
FRIDAY  
WEST WIND 5 TO 10 KNOTS. CHANCE OF SHOWERS AND SLIGHT  
CHANCE OF THUNDERSTORMS THROUGH THE DAY. WAVES 1 FOOT OR LESS.  
 
 
 
LSZ146-210415-  
PORT WING TO SAND ISLAND WI-  
248 PM CDT WED AUG 20 2025  
   
TONIGHT  
EAST WIND 5 KNOTS IN THE EVENING BECOMING VARIABLE  
10 KNOTS OR LESS. PATCHY FOG IN THE EVENING, THEN AREAS OF DENSE  
FOG AFTER MIDNIGHT. WAVES 1 FOOT OR LESS.    
THURSDAY  
VARIABLE WINDS 10 KNOTS OR LESS BECOMING NORTHEAST  
5 KNOTS IN THE AFTERNOON. AREAS OF DENSE FOG IN THE MORNING.  
WAVES 1 FOOT OR LESS.    
THURSDAY NIGHT  
SOUTHEAST WIND 5 KNOTS BECOMING SOUTHWEST IN  
THE LATE EVENING AND OVERNIGHT. CHANCE OF SHOWERS AND SLIGHT  
CHANCE OF THUNDERSTORMS AFTER MIDNIGHT. WAVES 1 FOOT OR LESS.    
FRIDAY  
SOUTHWEST WIND 5 TO 10 KNOTS. CHANCE OF SHOWERS AND  
SLIGHT CHANCE OF THUNDERSTORMS. WAVES 1 FOOT OR LESS.  
 
 
 
LSZ147-210415-  
SAND ISLAND TO BAYFIELD WI-  
248 PM CDT WED AUG 20 2025  
   
TONIGHT  
EAST WIND 5 KNOTS IN THE EVENING BECOMING VARIABLE  
10 KNOTS OR LESS. PATCHY FOG LATE IN THE EVENING. AREAS OF DENSE  
FOG AFTER MIDNIGHT. WAVES 1 FOOT OR LESS.    
THURSDAY  
VARIABLE WINDS 10 KNOTS OR LESS BECOMING SOUTH  
5 KNOTS LATE IN THE MORNING, THEN BECOMING EAST IN THE AFTERNOON.  
AREAS OF DENSE FOG IN THE MORNING. WAVES 1 FOOT OR LESS.    
THURSDAY NIGHT  
SOUTHEAST WIND 5 KNOTS BECOMING SOUTHWEST IN  
THE LATE EVENING AND OVERNIGHT. SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS AFTER MIDNIGHT. WAVES 1 FOOT OR LESS.    
FRIDAY  
SOUTHWEST WIND 5 TO 10 KNOTS. CHANCE OF SHOWERS AND  
SLIGHT CHANCE OF THUNDERSTORMS. WAVES 1 FOOT OR LESS.  
 
 
 
LSZ150-210415-  
OUTER APOSTLE ISLANDS BEYOND 5 NM FROM MAINLAND-  
248 PM CDT WED AUG 20 2025  
   
TONIGHT  
SOUTHEAST WIND 5 KNOTS BECOMING EAST IN THE LATE  
EVENING AND EARLY MORNING, THEN BECOMING SOUTHEAST LATE IN THE  
NIGHT. PATCHY FOG EARLY IN THE EVENING. AREAS OF DENSE FOG IN THE  
LATE EVENING AND OVERNIGHT. WAVES 1 FOOT OR LESS.    
THURSDAY  
SOUTH WIND 5 KNOTS BECOMING EAST LATE IN THE  
AFTERNOON. AREAS OF DENSE FOG IN THE MORNING. WAVES 1 FOOT OR  
LESS.    
THURSDAY NIGHT  
SOUTHEAST WIND 5 KNOTS BECOMING SOUTHWEST EARLY  
IN THE MORNING. SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS AFTER  
MIDNIGHT. WAVES 1 FOOT OR LESS.    
FRIDAY  
SOUTHWEST WIND 5 TO 10 KNOTS. CHANCE OF SHOWERS AND  
SLIGHT CHANCE OF THUNDERSTORMS. WAVES 1 FOOT OR LESS.  
 
 
 
LSZ121-210415-  
CHEQUAMEGON BAY-BAYFIELD TO OAK POINT WI-  
248 PM CDT WED AUG 20 2025  
   
TONIGHT  
EAST WIND 5 KNOTS IN THE EVENING BECOMING VARIABLE  
10 KNOTS OR LESS. AREAS OF DENSE FOG AFTER MIDNIGHT. WAVES 1 FOOT  
OR LESS.    
THURSDAY  
VARIABLE WINDS 10 KNOTS OR LESS BECOMING SOUTH  
5 KNOTS LATE IN THE MORNING, THEN BECOMING EAST IN THE AFTERNOON.  
AREAS OF DENSE FOG IN THE MORNING. WAVES 1 FOOT OR LESS.    
THURSDAY NIGHT  
SOUTHEAST WIND 5 KNOTS BECOMING SOUTHWEST IN  
THE LATE EVENING AND OVERNIGHT. SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS AFTER MIDNIGHT. WAVES 1 FOOT OR LESS.    
FRIDAY  
SOUTHWEST WIND 5 TO 10 KNOTS. SLIGHT CHANCE OF  
THUNDERSTORMS IN THE MORNING. CHANCE OF SHOWERS THROUGH THE DAY.  
CHANCE OF THUNDERSTORMS IN THE AFTERNOON. WAVES 1 FOOT OR LESS.  
 
 
 
LSZ148-210415-  
OAK POINT TO SAXON HARBOR WI-  
248 PM CDT WED AUG 20 2025  
   
TONIGHT  
EAST WIND 5 KNOTS IN THE EVENING BECOMING VARIABLE  
10 KNOTS OR LESS. PATCHY FOG IN THE EVENING, THEN AREAS OF DENSE  
FOG AFTER MIDNIGHT. WAVES 1 FOOT OR LESS.    
THURSDAY  
SOUTHWEST WIND 5 KNOTS BECOMING EAST IN THE  
AFTERNOON. AREAS OF DENSE FOG IN THE MORNING. WAVES 1 FOOT OR  
LESS.    
THURSDAY NIGHT  
SOUTHEAST WIND 5 KNOTS BECOMING SOUTHWEST IN  
THE LATE EVENING AND OVERNIGHT. SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS AFTER MIDNIGHT. WAVES 1 FOOT OR LESS.    
FRIDAY  
SOUTHWEST WIND 5 TO 10 KNOTS. SLIGHT CHANCE OF  
THUNDERSTORMS IN THE MORNING. CHANCE OF SHOWERS THROUGH THE DAY.  
CHANCE OF THUNDERSTORMS IN THE AFTERNOON. WAVES 1 FOOT OR LESS.  
 
 
 
GRAPHICAL MARINE FORECASTS ARE AVAILABLE ONLINE AT:  
WEATHER.GOV/GREATLAKES  
 
PA  
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