####018003576#### FZUS61 KBUF 210247 GLFLO Open Lake Forecast for Lake Ontario National Weather Service Buffalo NY 1047 PM 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 over the high Plains this evening will move to the northern Plains 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. LOZ062-210900- Lake Ontario open waters from the Niagara River to Hamlin Beach- 1047 PM EDT Sat Apr 20 2024 .OVERNIGHT...West winds 15 to 20 knots diminishing to 10 to 15 knots. Waves 2 to 4 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...West winds 15 to 20 knots becoming northwest 10 to 15 knots. Waves 3 to 5 feet subsiding to 2 to 4 feet. .MONDAY...Northwest winds 5 to 15 knots becoming southwest. Waves 1 to 3 feet. .MONDAY NIGHT...Southwest winds 10 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 rain Tuesday night. Waves 3 to 6 feet. .WEDNESDAY...Northwest winds 15 to 20 knots diminishing to 10 to 15 knots. Rain during the day. Waves 3 to 5 feet. .THURSDAY...Northwest winds 10 to 15 knots. Waves 2 to 4 feet subsiding to 1 to 3 feet. $$ LOZ063>065-210900- Lake Ontario open waters from Hamlin Beach to the Saint Lawrence River- 1047 PM EDT Sat Apr 20 2024 .OVERNIGHT...West winds 15 to 20 knots. Waves 3 to 6 feet subsiding to 2 to 4 feet. .SUNDAY...West winds 15 to 20 knots. Waves 2 to 4 feet building to 3 to 5 feet. .SUNDAY NIGHT...West winds 15 to 20 knots becoming northwest. Waves 3 to 6 feet. .MONDAY...North winds 5 to 15 knots becoming southwest. Waves 2 to 4 feet subsiding to 1 to 3 feet. .MONDAY NIGHT...Southwest winds 10 to 15 knots becoming south 15 to 20 knots. Waves 1 to 3 feet. .TUESDAY...South winds 15 to 25 knots becoming southwest. Rain Tuesday night. Waves 3 to 5 feet subsiding to 2 to 4 feet. .WEDNESDAY...West winds 15 to 20 knots becoming northwest. Rain during the day, then a chance of rain showers Wednesday night. Waves 3 to 6 feet building to 4 to 7 feet, then subsiding to 3 to 6 feet. Waves occasionally around 9 feet. .THURSDAY...Northwest winds 15 to 20 knots diminishing to 10 to 15 knots. Waves 3 to 5 feet subsiding to 1 to 3 feet. $$ LOZ061-210900- MAFOR 2103/ ONTARIO WEST 1/2 14610 11620 11520 12620. Waves 2 to 4 feet subsiding to 1 to 3 feet overnight. Waves 1 to 3 feet building to 2 to 4 feet Sunday. Waves 3 to 5 feet Sunday evening. ONTARIO EAST 1/2 16620. Waves 3 to 6 feet subsiding to 2 to 4 feet overnight. Waves 2 to 4 feet building to 3 to 5 feet Sunday. Waves 3 to 6 feet Sunday evening. $$ ####018001157#### FZUS61 KBUF 210247 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 1047 PM EDT Sat Apr 20 2024 SLZ022-024-210900- Saint Lawrence River from Cape Vincent to Saint Regis 1047 PM EDT Sat Apr 20 2024 .OVERNIGHT...Southwest winds 10 to 15 knots. Mainly clear, then becoming partly cloudy. .SUNDAY...Southwest winds 10 to 15 knots increasing to 15 to 20 knots. Partly sunny in the morning, then becoming mostly cloudy. .SUNDAY NIGHT...Southwest winds 15 to 20 knots becoming northwest 5 to 15 knots. Partly to mostly cloudy. .MONDAY...Northwest winds 5 to 10 knots becoming west. Sunny. .MONDAY NIGHT...Southwest winds around 10 knots becoming south. Mainly clear in the evening, then becoming partly cloudy. .TUESDAY...South winds 15 to 20 knots becoming southwest 10 to 15 knots. Rain Tuesday night. .WEDNESDAY...Southwest winds 10 to 15 knots becoming west. Rain during the day, then a chance of rain and snow showers Wednesday night. .THURSDAY...Northwest winds 10 knots or less becoming west. Partly cloudy. $$