112  
FZUS61 KBUF 130802  
GLFLO  
 
OPEN LAKE FORECAST FOR LAKE ONTARIO  
NATIONAL WEATHER SERVICE BUFFALO NY  
402 AM EDT SUN JUL 13 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
 
A 29.3 INCH LOW NEAR JAMES BAY WILL LIFT NORTH ACROSS  
HUDSON BAY AND INTO NORTHERN QUEBEC TODAY... WHILE SLOWLY DRAGGING  
ITS TRAILING COLD FRONT ACROSS THE LAKE TONIGHT. A 30.1 INCH HIGH  
WILL SLOWLY DRIFT FROM THE UPPER MIDWEST TO NEW ENGLAND MONDAY  
THROUGH WEDNESDAY...THEN A 29.7 INCH LOW WILL TRACK NORTHEASTWARD  
ACROSS THE GREAT LAKES AND INTO QUEBEC WEDNESDAY NIGHT AND THURSDAY.  
 
LOZ062-131500-  
LAKE ONTARIO OPEN WATERS FROM THE NIAGARA RIVER TO HAMLIN BEACH-  
402 AM EDT SUN JUL 13 2025  
   
TODAY
 
SOUTHWEST WINDS 5 TO 10 KNOTS. A CHANCE OF SHOWERS AND  
THUNDERSTORMS. WAVES 1 TO 2 FEET.    
TONIGHT
 
SOUTHWEST WINDS 10 KNOTS OR LESS BECOMING NORTHWEST. A  
CHANCE OF SHOWERS AND THUNDERSTORMS EARLY, THEN A CHANCE OF  
SHOWERS LATE IN THE EVENING. WAVES 2 FEET OR LESS.    
MONDAY
 
LIGHT AND VARIABLE WINDS BECOMING SOUTH 5 TO 10 KNOTS.  
WAVES 1 FOOT OR LESS.    
MONDAY NIGHT
 
SOUTH WINDS 5 TO 10 KNOTS BECOMING WEST. WAVES  
1 FOOT OR LESS.    
TUESDAY
 
WEST WINDS 10 KNOTS OR LESS BECOMING SOUTH. WAVES  
1 FOOT OR LESS.    
WEDNESDAY
 
SOUTHWEST WINDS 10 KNOTS OR LESS. A CHANCE OF  
SHOWERS. WAVES 2 FEET OR LESS.    
THURSDAY
 
SOUTHWEST WINDS 10 TO 15 KNOTS BECOMING NORTHWEST. A  
CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES 1 TO 2 FEET.  
 
WINDS AND WAVES HIGHER IN AND NEAR THUNDERSTORMS.  
 

 
 
LOZ063>065-131500-  
LAKE ONTARIO OPEN WATERS FROM HAMLIN BEACH TO THE SAINT LAWRENCE  
RIVER-  
402 AM EDT SUN JUL 13 2025  
   
TODAY
 
SOUTH WINDS 5 TO 15 KNOTS. A CHANCE OF SHOWERS AND  
THUNDERSTORMS THIS MORNING, THEN SHOWERS WITH THUNDERSTORMS  
LIKELY THIS AFTERNOON. WAVES 1 TO 3 FEET.    
TONIGHT
 
SOUTH WINDS 10 KNOTS OR LESS BECOMING SOUTHWEST.  
SHOWERS LIKELY WITH A CHANCE OF THUNDERSTORMS EARLY, THEN A  
CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES 2 FEET OR LESS.    
MONDAY
 
WEST WINDS 10 KNOTS OR LESS BECOMING SOUTHWEST. WAVES  
1 FOOT OR LESS.    
MONDAY NIGHT
 
SOUTHWEST WINDS 10 KNOTS OR LESS. WAVES 1 FOOT OR  
LESS.    
TUESDAY
 
SOUTHWEST WINDS 10 KNOTS OR LESS BECOMING SOUTH. WAVES  
1 FOOT OR LESS.    
WEDNESDAY
 
SOUTH WINDS 5 TO 10 KNOTS. A CHANCE OF SHOWERS  
DURING THE DAY, THEN A CHANCE OF SHOWERS AND THUNDERSTORMS  
WEDNESDAY NIGHT. WAVES 2 FEET OR LESS.    
THURSDAY
 
SOUTHWEST WINDS 5 TO 15 KNOTS BECOMING NORTHWEST.  
SHOWERS LIKELY WITH A CHANCE OF THUNDERSTORMS. WAVES 1 TO 2 FEET.  
 
WINDS AND WAVES HIGHER IN AND NEAR THUNDERSTORMS.  
 

 
 
LOZ061-131500-  
MAFOR 1309/  
ONTARIO WEST 1/2 12500 11600 13500 12700. A CHANCE OF SHOWERS  
EARLY THIS MORNING. A CHANCE OF SHOWERS AND THUNDERSTORMS THIS  
AFTERNOON. A CHANCE OF SHOWERS AND THUNDERSTORMS THIS EVENING.  
WAVES 2 FEET OR LESS.  
 
ONTARIO EAST 1/2 12410 11510 11506 13400 11500. A CHANCE OF  
THUNDERSTORMS TODAY AND THIS EVENING. WAVES 1 TO 3 FEET TODAY.  
WAVES 2 FEET OR LESS TONIGHT.  
 

 
 
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