871  
FZUS61 KBUF 050802  
GLFLO  
 
OPEN LAKE FORECAST FOR LAKE ONTARIO  
NATIONAL WEATHER SERVICE BUFFALO NY  
402 AM EDT SAT JUL 5 2025  
 
FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE ONTARIO  
 
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.  
   
SYNOPSIS
 
AN EXPANSIVE 30.2 INCH HIGH WILL DRIFT AWAY FROM THE  
MID-ATLANTIC COAST TODAY. A WAVY COLD FRONTAL BOUNDARY WILL THEN  
SLOWLY PUSH SOUTHEASTWARD ACROSS THE UPPER GREAT LAKES AND SOUTHERN  
ONTARIO SUNDAY, THEN ACROSS THE LOWER GREAT LAKES ON MONDAY.  
FOLLOWING THE FRONTAL PASSAGE...A 30.1 INCH SURFACE HIGH WILL BUILD  
ACROSS THE LOWER GREAT LAKES ON TUESDAY INTO WEDNESDAY.  
 
LOZ062-051500-  
LAKE ONTARIO OPEN WATERS FROM THE NIAGARA RIVER TO HAMLIN BEACH-  
402 AM EDT SAT JUL 5 2025  
   
TODAY
 
SOUTH WINDS 5 TO 10 KNOTS BECOMING SOUTHEAST. WAVES  
1 FOOT OR LESS.    
TONIGHT
 
SOUTH WINDS 10 TO 15 KNOTS BECOMING SOUTHWEST. WAVES  
2 FEET OR LESS.    
SUNDAY
 
SOUTHWEST WINDS 10 TO 15 KNOTS INCREASING TO 15 TO  
20 KNOTS. WAVES 1 TO 3 FEET BUILDING TO 3 TO 5 FEET.    
SUNDAY NIGHT
 
SOUTHWEST WINDS 15 TO 20 KNOTS BECOMING WEST  
10 TO 15 KNOTS. A CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES 3 TO  
5 FEET SUBSIDING TO 1 TO 3 FEET.    
MONDAY
 
WEST WINDS 5 TO 10 KNOTS BECOMING NORTHWEST. A CHANCE  
OF SHOWERS AND THUNDERSTORMS DURING THE DAY, THEN A CHANCE OF  
SHOWERS MONDAY NIGHT. WAVES 2 FEET OR LESS.    
TUESDAY
 
NORTH WINDS 5 TO 10 KNOTS BECOMING NORTHWEST. WAVES  
1 FOOT OR LESS.    
WEDNESDAY
 
NORTHWEST WINDS 10 KNOTS OR LESS BECOMING EAST.  
WAVES 1 FOOT OR LESS.  
 
WINDS AND WAVES HIGHER IN AND NEAR THUNDERSTORMS.  
 

 
 
LOZ063>065-051500-  
LAKE ONTARIO OPEN WATERS FROM HAMLIN BEACH TO THE SAINT LAWRENCE  
RIVER-  
402 AM EDT SAT JUL 5 2025  
   
TODAY
 
SOUTH WINDS 5 TO 10 KNOTS BECOMING SOUTHEAST. WAVES  
1 FOOT OR LESS.    
TONIGHT
 
SOUTHEAST WINDS 5 TO 10 KNOTS BECOMING SOUTH. WAVES  
2 FEET OR LESS.    
SUNDAY
 
SOUTHWEST WINDS 10 TO 15 KNOTS. WAVES 1 TO 3 FEET.    
SUNDAY NIGHT
 
SOUTHWEST WINDS 5 TO 10 KNOTS. A CHANCE OF  
SHOWERS. WAVES 1 TO 3 FEET.    
MONDAY
 
SOUTHWEST WINDS 5 TO 10 KNOTS BECOMING NORTH. A CHANCE  
OF SHOWERS AND THUNDERSTORMS DURING THE DAY, THEN A CHANCE OF  
SHOWERS MONDAY NIGHT. WAVES 2 FEET OR LESS.    
TUESDAY
 
NORTH WINDS 10 KNOTS OR LESS BECOMING NORTHWEST. WAVES  
1 FOOT OR LESS.    
WEDNESDAY
 
NORTHWEST WINDS LESS THAN 10 KNOTS BECOMING SOUTH.  
WAVES 1 FOOT OR LESS.  
 
WINDS AND WAVES HIGHER IN AND NEAR THUNDERSTORMS.  
 

 
 
LOZ061-051500-  
MAFOR 0509/  
ONTARIO WEST 1/2 12400 12300 11400 11410 12510. WAVES 2 FEET OR  
LESS.  
 
ONTARIO EAST 1/2 12400 13300 13400. WAVES 2 FEET OR LESS.  
 

 
 
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