Expires:202101172230;;064918 FZUS61 KBUF 171731 GLFLO Open Lake Forecast for Lake Ontario National Weather Service Buffalo NY 1231 PM EST Sun Jan 17 2021 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 28.9 inch surface low over New Brunswick Canada will lift northward to northern Quebec and Labrador Canada by Tuesday while a weak low pressure of 29.7 inches crosses the Great Lakes. A 30.2 inch high pressure ridge will then cross the Great Lakes later Tuesday into Wednesday before low pressure of 29.3 inches tracks across northern Ontario and the Upper Great Lakes on Thursday. LOZ061-172230- MAFOR 1716/ ONTARIO WEST 1/2 12630 11720 12710 11700 12710. A chance of rain and snow showers this afternoon. A chance of snow showers this evening. Waves 5 to 9 feet, and occasionally around 11 feet this afternoon. Waves 4 to 7 feet subsiding to 1 to 3 feet, and occasionally around 9 feet tonight. Waves 1 to 3 feet Monday morning. ONTARIO EAST 1/2 11647 11630 11637 11720 11710 11700 12710. Waves 7 to 11 feet, and occasionally around 14 feet this afternoon. Waves 5 to 8 feet subsiding to 2 to 4 feet, and occasionally around 10 feet tonight. Waves 1 to 3 feet Monday morning. $$ JLA