FZUS61 KBUF 312350 GLFLO Open Lake Forecast for Lake Ontario National Weather Service Buffalo NY 750 PM EDT Sat Oct 31 2020 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 29.3 inch low will move across Quebec by Sunday, with a strong trailing cold front crossing the lake late in the day. High pressure of 30.5 inches over the southern United States on Monday will expand a ridge of 30.1 inches toward the Great Lakes on Tuesday. The high will then build to 30.5 inches as it exits the East Coast on Wednesday. LOZ062-010315- Lake Ontario open waters from the Niagara River to Hamlin Beach- 750 PM EDT Sat Oct 31 2020 ...GALE WATCH IN EFFECT FROM LATE SUNDAY NIGHT THROUGH LATE MONDAY NIGHT... .TONIGHT...South winds 10 to 15 knots increasing to 15 to 20 knots. Waves 1 to 3 feet building to 2 to 4 feet. .SUNDAY...South winds to 30 knots becoming west. Rain from late morning on. Waves 3 to 6 feet building to 7 to 10 feet. Waves occasionally around 13 feet. .SUNDAY NIGHT...West winds to 30 knots becoming northwest and increasing to 35 knot gales overnight. Rain showers likely in the evening, then rain and snow showers likely overnight. Waves 6 to 10 feet building to 8 to 11 feet. Waves occasionally around 14 feet. .MONDAY...Northwest winds to 35 knot gales becoming west. A chance of snow showers in the morning, then a chance of rain and snow showers in the afternoon. Waves 7 to 11 feet subsiding to 5 to 9 feet. Waves occasionally around 14 feet. .MONDAY NIGHT...West gales to 40 knots diminishing to 30 knots. A chance of showers. Waves 7 to 10 feet building to 9 to 13 feet. Waves occasionally around 16 feet. .TUESDAY...Northwest winds 15 to 25 knots becoming southwest and diminishing to 10 to 15 knots. A chance of rain showers during the day. Waves 7 to 10 feet subsiding to 1 to 3 feet. Waves occasionally around 13 feet. .WEDNESDAY...Southwest winds 10 to 15 knots. Waves 1 to 3 feet. .THURSDAY...Southwest winds 10 to 15 knots. Waves 2 to 3 feet. $$ LOZ063>065-010315- Lake Ontario open waters from Hamlin Beach to the Saint Lawrence River- 750 PM EDT Sat Oct 31 2020 ...GALE WATCH IN EFFECT FROM LATE SUNDAY NIGHT THROUGH LATE MONDAY NIGHT... .TONIGHT...South winds 15 to 25 knots increasing to 30 knots. Waves 2 to 4 feet building to 4 to 7 feet. Waves occasionally around 9 feet. .SUNDAY...South winds to 30 knots becoming southwest. Rain in the afternoon. Waves 5 to 8 feet building to 7 to 10 feet. Waves occasionally around 13 feet. .SUNDAY NIGHT...West winds to 30 knots becoming northwest and increasing to 35 knot gales overnight. Rain showers in the evening, then rain showers with snow showers likely overnight. Waves 7 to 11 feet. Waves occasionally around 14 feet. .MONDAY...Northwest gales to 35 knots becoming west and diminishing to 30 knots in the afternoon. Snow showers likely in the morning, then rain showers likely with a chance of snow showers in the afternoon. Waves 9 to 12 feet subsiding to 7 to 10 feet. Waves occasionally around 15 feet. .MONDAY NIGHT...West winds to 30 knots becoming northwest and increasing to 35 knot gales overnight. Showers likely. Waves 8 to 11 feet building to 12 to 16 feet. Waves occasionally around 20 feet. .TUESDAY...Northwest winds 15 to 25 knots becoming south and diminishing to 5 to 15 knots. Rain showers likely with a chance of snow showers during the day. Waves 10 to 13 feet subsiding to 1 to 3 feet. Waves occasionally around 16 feet. .WEDNESDAY...South winds 15 to 20 knots becoming southwest. Waves 1 to 3 feet building to 2 to 4 feet. .THURSDAY...Southwest winds 15 to 20 knots diminishing to 10 to 15 knots. Waves 2 to 4 feet subsiding to 1 to 3 feet. $$ LOZ061-010315- MAFOR 0100 AMD/ ONTARIO WEST 1/2 12420 13430 11536 11646. Waves 1 to 2 feet building to 3 to 5 feet tonight. Waves 3 to 6 feet building to 5 to 9 feet, and occasionally around 11 feet Sunday. ONTARIO EAST 1/2 11420 12430 13440 11546. Waves 2 to 4 feet building to 4 to 7 feet, and occasionally around 9 feet tonight. Waves 5 to 8 feet, and occasionally around 10 feet Sunday. $$