420 FZUS61 KBUF 101437 GLFLO Open Lake Forecast for Lake Ontario National Weather Service Buffalo NY 937 AM EST Fri Mar 10 2023 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...Low pressure will deepen to 29.6 inches as it moves from Ohio eastward across northern Pennsylvania this afternoon and evening. A secondary low will deepen to 29.1 inches well east of New Jersey late tonight and Saturday. A ridge of high pressure averaging 30.1 inches will then build into the eastern Great Lakes Saturday night before moving east to New England Sunday. A 29.7 inch low is then forecast to move east across the Great Lakes Sunday night into Monday. Another low will rapidly deepen to 28.9 inches off the Mid Atlantic coast Monday night before moving north towards New England Tuesday. LOZ062-102215- Lake Ontario open waters from the Niagara River to Hamlin Beach- 937 AM EST Fri Mar 10 2023 .THIS AFTERNOON...East winds to 30 knots becoming northeast. Snow. Waves 5 to 9 feet. Waves occasionally around 11 feet. .TONIGHT...Northeast winds to 30 knots becoming north and diminishing to 15 to 20 knots. Snow. Waves 6 to 9 feet subsiding to 4 to 7 feet. Waves occasionally around 11 feet. .SATURDAY...North winds 15 to 20 knots diminishing to 5 to 10 knots. A chance of snow showers in the morning. Waves 3 to 6 feet subsiding to 1 to 3 feet. .SATURDAY NIGHT...North winds 10 knots or less becoming east. Waves 1 foot or less. .SUNDAY...East winds 5 to 15 knots becoming southeast. A chance of snow showers during the day, then snow showers likely Sunday night. Waves 1 foot or less building to 1 to 3 feet. .MONDAY...South winds 10 to 15 knots becoming northwest and increasing to 15 to 25 knots. Rain and snow showers likely during the day, then snow showers likely Monday night. Waves 1 to 3 feet building to 3 to 6 feet. .TUESDAY...Northwest winds 20 to 25 knots. Snow showers likely. Waves 5 to 8 feet. Waves occasionally around 10 feet. $$ LOZ063>065-102215- Lake Ontario open waters from Hamlin Beach to the Saint Lawrence River- 937 AM EST Fri Mar 10 2023 .THIS AFTERNOON...Northeast winds 15 to 25 knots. A chance of snow showers early. Snow late. Waves 3 to 6 feet building to 4 to 7 feet. Waves occasionally around 9 feet. .TONIGHT...Northeast winds to 30 knots. Snow. Waves 6 to 10 feet. Waves occasionally around 13 feet. .SATURDAY...North winds 15 to 25 knots diminishing to 10 to 15 knots. Snow showers likely in the morning. Waves 5 to 8 feet subsiding to 1 to 3 feet. Waves occasionally around 10 feet. .SATURDAY NIGHT...North winds 5 to 15 knots becoming northeast. Waves 1 to 3 feet subsiding to 1 foot or less. .SUNDAY...East winds 5 to 15 knots becoming southeast. Snow showers likely Sunday night. Waves 1 to 3 feet. .MONDAY...South winds 15 to 25 knots becoming northwest. Rain and snow showers. Waves 1 to 3 feet building to 4 to 7 feet. Waves occasionally around 9 feet. .TUESDAY...Northwest winds 20 to 25 knots. Snow showers. Waves 5 to 9 feet. Waves occasionally around 11 feet. $$ LOZ061-102215- MAFOR 1016/ ONTARIO WEST 1/2 11247 14147 11837 11827 11820. A chance of snow showers Saturday morning. Waves 5 to 9 feet, and occasionally around 11 feet this afternoon and tonight. Waves 4 to 7 feet subsiding to 3 to 5 feet, and occasionally around 9 feet Saturday morning. ONTARIO EAST 1/2 11130 11137 14147 11137 11820. A chance of snow showers Saturday morning. Waves 3 to 6 feet building to 4 to 7 feet, and occasionally around 9 feet this afternoon. Waves 6 to 10 feet, and occasionally around 13 feet tonight. Waves 5 to 8 feet subsiding to 3 to 6 feet, and occasionally around 10 feet Saturday morning. $$ JLA