####018003669#### FZUS61 KBUF 201500 GLFLO Open Lake Forecast for Lake Ontario National Weather Service Buffalo NY 1100 AM EDT Sat Apr 20 2024 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 30.5 inch high will move from the Canadian Rockies to the northern Plains today through tonight. The large high will continue to push south to the lower Mississippi Valley by late Sunday. The high will weaken some to 30.2 as it slides east into the Ohio Valley by late Monday and ridges over the Lake. This high will slip to the east Tuesday, while a 29.5 inch surface low deepens across the western Great Lakes, with a warm front extending towards the Lake Tuesday night. The 29.7 inch low will cross the Lake late Tuesday night and Wednesday. A 30.3 inch high will then build across the Lake Wednesday night and Thursday. LOZ062-202130- Lake Ontario open waters from the Niagara River to Hamlin Beach- 1100 AM EDT Sat Apr 20 2024 .THIS AFTERNOON...West winds 15 to 25 knots. Waves 3 to 6 feet. .TONIGHT...West winds 15 to 20 knots diminishing to 10 to 15 knots. Waves 3 to 5 feet subsiding to 1 to 3 feet. .SUNDAY...West winds 10 to 15 knots becoming southwest 15 to 20 knots. Waves 1 to 3 feet building to 2 to 4 feet. .SUNDAY NIGHT...Southwest winds 15 to 20 knots becoming northwest 10 to 15 knots. Waves 2 to 4 feet. .MONDAY...Northwest winds 5 to 15 knots becoming south. Waves 1 to 3 feet. .TUESDAY...South winds 15 to 25 knots becoming southwest. A chance of showers during the day, then showers Tuesday night. Waves 2 to 4 feet building to 3 to 5 feet, then subsiding to 2 to 4 feet. .WEDNESDAY...Northwest winds 15 to 20 knots. Rain showers during the day. Waves 3 to 5 feet. $$ LOZ063>065-202130- Lake Ontario open waters from Hamlin Beach to the Saint Lawrence River- 1100 AM EDT Sat Apr 20 2024 .THIS AFTERNOON...Southwest winds 15 to 25 knots becoming west. Waves 2 to 4 feet building to 5 to 8 feet. Waves occasionally around 10 feet. .TONIGHT...West winds 15 to 25 knots. Waves 5 to 8 feet subsiding to 2 to 4 feet. Waves occasionally around 10 feet. .SUNDAY...West winds 15 to 20 knots. Waves 2 to 4 feet building to 3 to 5 feet. .SUNDAY NIGHT...Southwest winds 15 to 20 knots becoming northwest 10 to 15 knots. Waves 3 to 6 feet. .MONDAY...Northwest winds 10 to 15 knots becoming south 15 to 20 knots. Waves 2 to 4 feet subsiding to 1 to 3 feet. .TUESDAY...South winds 15 to 20 knots becoming southwest. A chance of rain showers during the day, then rain showers Tuesday night. Waves 2 to 4 feet. .WEDNESDAY...Southwest winds 15 to 20 knots becoming northwest. Rain showers during the day, then a chance of rain showers Wednesday night. Waves 3 to 6 feet building to 4 to 7 feet, then subsiding to 3 to 6 feet. Waves occasionally around 9 feet. $$ LOZ061-202130- MAFOR 2015/ ONTARIO WEST 1/2 12630 12620 14610. Waves 3 to 6 feet building to 4 to 7 feet, and occasionally around 9 feet this afternoon. Waves 3 to 6 feet subsiding to 1 to 3 feet tonight. Waves 1 to 3 feet Sunday morning. ONTARIO EAST 1/2 13630 11620 12610 12620. Waves 2 to 4 feet building to 5 to 8 feet, and occasionally around 10 feet this afternoon. Waves 5 to 8 feet subsiding to 2 to 4 feet, and occasionally around 10 feet tonight. Waves 2 to 4 feet building to 3 to 5 feet Sunday morning. $$