765 FZUS61 KBUF 102046 GLFLO Open Lake Forecast for Lake Ontario National Weather Service Buffalo NY 346 PM EST Fri Mar 10 2023 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...Low pressure will deepen to 29.6 inches as it moves across northern Pennsylvania this evening. A secondary low will deepen to 29.1 inches well east of New Jersey late tonight and Saturday. A ridge of high pressure averaging 30.1 inches will then build into the eastern Great Lakes Saturday night before moving east to New England Sunday. A 29.7 inch low is then forecast to move east across the Great Lakes Sunday night into Monday. Another low will rapidly deepen to 28.9 inches off the Mid Atlantic coast Monday night before moving north towards New England Tuesday. LOZ062-110430- Lake Ontario open waters from the Niagara River to Hamlin Beach- 346 PM EST Fri Mar 10 2023 .TONIGHT...Northeast winds to 30 knots becoming north and diminishing to 15 to 20 knots. Snow. Waves 6 to 10 feet subsiding to 4 to 7 feet. Waves occasionally around 13 feet. .SATURDAY...North winds 15 to 20 knots diminishing to 5 to 10 knots. A chance of snow showers in the morning. Waves 3 to 6 feet subsiding to 1 to 3 feet. .SATURDAY NIGHT...North winds 5 to 10 knots becoming east. Waves 1 foot or less. .SUNDAY...East winds 5 to 15 knots. A chance of snow showers in the afternoon. Waves 1 to 3 feet. .SUNDAY NIGHT...East winds 10 to 15 knots becoming southeast. Snow showers likely. Waves 1 to 3 feet. .MONDAY...South winds 10 to 15 knots becoming northwest 15 to 20 knots. Snow and rain showers likely during the day, then snow showers likely Monday night. Waves 1 to 3 feet building to 3 to 5 feet. .TUESDAY...Northwest winds 15 to 25 knots. Snow showers likely. Waves 4 to 7 feet. Waves occasionally around 9 feet. .WEDNESDAY...Northwest winds 15 to 20 knots becoming west and diminishing to around 10 knots. Waves 3 to 6 feet subsiding to 1 to 3 feet. $$ LOZ063>065-110430- Lake Ontario open waters from Hamlin Beach to the Saint Lawrence River- 346 PM EST Fri Mar 10 2023 .TONIGHT...Northeast winds 15 to 25 knots increasing to 30 knots. Snow. Waves 5 to 9 feet building to 6 to 10 feet. Waves occasionally around 13 feet. .SATURDAY...North winds 15 to 25 knots. Snow likely early, then a chance of snow showers late in the morning. Waves 5 to 8 feet subsiding to 2 to 4 feet. Waves occasionally around 10 feet. .SATURDAY NIGHT...North winds 5 to 15 knots becoming northeast. Waves 1 to 3 feet. .SUNDAY...East winds 5 to 15 knots. Waves 2 feet or less. .SUNDAY NIGHT...East winds 10 to 15 knots becoming southeast 15 to 20 knots. Snow showers likely. Waves 1 to 3 feet. .MONDAY...Southeast winds 15 to 20 knots becoming northwest. Snow showers with rain showers likely during the day, then snow showers Monday night. Waves 2 to 4 feet building to 3 to 5 feet. .TUESDAY...Northwest winds 15 to 25 knots. Snow showers. Waves 3 to 6 feet building to 5 to 8 feet. Waves occasionally around 10 feet. .WEDNESDAY...Northwest winds 15 to 25 knots diminishing to 10 to 15 knots. A chance of snow showers during the day. Waves 4 to 7 feet subsiding to 2 to 4 feet. Waves occasionally around 9 feet. $$ LOZ061-110430- MAFOR 1022/ ONTARIO WEST 1/2 13147 11837 12820 11810 11800. A chance of snow showers Saturday morning. Waves 6 to 10 feet subsiding to 5 to 8 feet, and occasionally around 13 feet tonight. Waves 4 to 7 feet subsiding to 1 to 2 feet, and occasionally around 9 feet Saturday. ONTARIO EAST 1/2 14147 11837 11830 11820 11810. A chance of snow showers Saturday morning. Waves 5 to 9 feet building to 6 to 10 feet, and occasionally around 13 feet tonight. Waves 5 to 8 feet subsiding to 2 to 4 feet, and occasionally around 10 feet Saturday. $$