


Great Lakes Forecast
Issued by NWS
Issued by NWS
208 FZUS61 KBUF 030813 GLFLO Open Lake Forecast for Lake Ontario National Weather Service Buffalo NY 413 AM EDT Thu Apr 3 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 29.0 inch low will track from Lake Superior to western Quebec today with its trailing cold front crossing the lake in the process. A 30.2 inch high will build across the Great Lakes region tonight and Friday. A frontal boundary will develop south of the lake with a series of weak lows tracking along this boundary during the weekend. A weak 29.7 inch trough of low pressure will move across the Great Lakes on Monday. LOZ062-031515- Lake Ontario open waters from the Niagara River to Hamlin Beach- 413 AM EDT Thu Apr 3 2025 .TODAY...South winds 15 to 25 knots becoming west. Showers likely with a chance of thunderstorms early, then just a chance of showers late this morning. Waves 2 to 4 feet building to 3 to 6 feet. .TONIGHT...West winds 15 to 20 knots diminishing to around 10 knots. Waves 3 to 6 feet subsiding to 1 to 3 feet. .FRIDAY...Northwest winds 5 to 10 knots becoming southwest. Waves 2 feet or less. .FRIDAY NIGHT...Southeast winds 10 to 15 knots becoming east 15 to 20 knots. A chance of showers in the evening, then widespread showers overnight. Waves building to 2 to 4 feet. .SATURDAY...East winds 15 to 20 knots becoming northwest 10 to 15 knots. Showers. Waves 3 to 6 feet. .SUNDAY...Northwest winds 10 to 15 knots. Rain showers likely. Waves 2 to 3 feet. .MONDAY...Northwest winds increasing to 15 to 20 knots. A chance of rain and snow showers. Waves building to 3 to 6 feet. Winds and waves higher in and near thunderstorms. $$ LOZ063>065-031515- Lake Ontario open waters from Hamlin Beach to the Saint Lawrence River- 413 AM EDT Thu Apr 3 2025 .TODAY...South winds to 30 knots becoming southwest 15 to 25 knots. Showers with a chance of thunderstorms early, then just a chance of showers. Some thunderstorms may produce gusty winds. Waves 4 to 7 feet subsiding to 3 to 6 feet. Waves occasionally around 9 feet. .TONIGHT...West winds 15 to 20 knots diminishing to 5 to 15 knots. Waves 3 to 6 feet subsiding to 2 to 4 feet. .FRIDAY...West winds 5 to 10 knots. Waves 1 to 3 feet. .FRIDAY NIGHT...Southwest winds 10 to 15 knots becoming east. A chance of rain showers in the evening, then rain showers likely overnight. Waves 2 feet or less. .SATURDAY...East winds 15 to 25 knots. Rain showers. Waves building to 3 to 6 feet. .SUNDAY...Northwest winds 10 to 15 knots. Rain showers. Waves 1 to 3 feet. .MONDAY...Northwest winds 10 to 15 knots becoming west 15 to 20 knots. A chance of rain and snow showers Monday night. Waves building to 3 to 6 feet. Winds and waves higher in and near thunderstorms. $$ LOZ061-031515- MAFOR 0309/ ONTARIO WEST 1/2 11426 11520 11530 11520 12620 11610 11600. A chance of thunderstorms this morning. Waves 2 to 4 feet building to 3 to 6 feet today. Waves 3 to 6 feet subsiding to 1 to 3 feet tonight. ONTARIO EAST 1/2 11446 11430 11530 11520 12620 11610 11600. A chance of thunderstorms this morning. Waves 3 to 6 feet building to 4 to 7 feet, then subsiding to 3 to 6 feet, and occasionally around 9 feet today. Waves 3 to 6 feet subsiding to 2 to 4 feet tonight. $$ EAJ/RSH