FZUS61 KBUF 212303 GLFLO Open Lake Forecast for Lake Ontario National Weather Service Buffalo NY 603 PM EST Thu Feb 21 2019 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 29.6 inch low over western Quebec will exit over the Canadian Maritimes tonight. A 30.4 inch high will then build across the Great Lakes region Friday and Friday night. An area of low pressure near 29.7 inches Saturday over the Central Plains will rapidly deepen to 28.8 inches by Sunday night as it crosses through the Central Great Lakes and into southern Ontario Canada. This low will then track across southern Newfoundland Monday night, while a strong area of high pressure builds across the Eastern Great Lakes region Tuesday. LOZ062-220415- Lake Ontario open waters from the Niagara River to Hamlin Beach- 603 PM EST Thu Feb 21 2019 .TONIGHT...West winds 15 to 25 knots diminishing to 10 to 15 knots. Waves 5 to 8 feet subsiding to 2 to 4 feet. Waves occasionally around 10 feet. .FRIDAY...Northwest winds 5 to 15 knots becoming west. Waves 1 to 3 feet. .FRIDAY NIGHT...West winds 10 knots or less becoming east. Waves 1 foot or less. .SATURDAY...East winds 10 to 15 knots increasing to 15 to 20 knots. Waves 1 to 3 feet building to 2 to 4 feet. .SATURDAY NIGHT...East winds 15 to 20 knots becoming southeast. Rain showers. Waves 3 to 5 feet. .SUNDAY...South gales to 35 knots becoming west and increasing to 45 knots. Rain showers during the day, then a chance of rain and snow showers Sunday night. Waves 5 to 8 feet building to 17 to 22 feet, then subsiding to 16 to 21 feet. Waves occasionally around 28 feet. .MONDAY...Northwest gales to 40 knots diminishing to 15 to 20 knots. A chance of snow showers during the day. Waves 13 to 17 feet subsiding to 3 to 6 feet. Waves occasionally around 22 feet. .TUESDAY...Northwest winds 10 to 15 knots becoming north. A chance of snow showers. Waves 1 to 3 feet. $$ LOZ063>065-220415- Lake Ontario open waters from Hamlin Beach to the Saint Lawrence River- 603 PM EST Thu Feb 21 2019 .TONIGHT...West winds 15 to 25 knots diminishing to 10 to 15 knots. Waves 5 to 9 feet subsiding to 3 to 6 feet. Waves occasionally around 11 feet. .FRIDAY...Northwest winds 5 to 15 knots becoming west. Waves 2 to 4 feet subsiding to 1 to 3 feet. .FRIDAY NIGHT...West winds 5 to 10 knots becoming southeast. Waves 2 feet or less. .SATURDAY...Southeast winds 5 to 15 knots becoming east 15 to 20 knots. Waves 1 to 3 feet. .SATURDAY NIGHT...East winds 15 to 25 knots becoming southeast. A chance of rain and snow showers in the evening, then rain showers overnight. Waves 2 to 4 feet building to 3 to 6 feet. .SUNDAY...South winds to 30 knots becoming west and increasing to 45 knot gales. Rain showers during the day, then rain showers likely with a chance of snow showers Sunday night. Waves 5 to 8 feet building to 18 to 23 feet. Waves occasionally around 29 feet. .MONDAY...West gales to 40 knots becoming northwest and diminishing to 15 to 20 knots. A chance of snow showers. Waves 16 to 21 feet subsiding to 4 to 7 feet. Waves occasionally around 27 feet. .TUESDAY...Northwest winds 10 to 15 knots becoming north. A chance of snow showers Tuesday night. Waves 2 to 4 feet subsiding to 1 to 3 feet. $$ LOZ061-220415- MAFOR 2122/ ONTARIO WEST 1/2 12630 11620 11610 12710 11610 11600. Waves 5 to 9 feet subsiding to 3 to 6 feet, and occasionally around 11 feet tonight. Waves 1 to 3 feet Friday. ONTARIO EAST 1/2 12630 11620 11610 12710 11610 11600. Waves 5 to 9 feet subsiding to 3 to 6 feet, and occasionally around 11 feet tonight. Waves 2 to 4 feet subsiding to 1 to 3 feet Friday. $$ Hitchcock