Expires:202306062115;;658040 FZUS61 KBUF 061450 GLFLO Open Lake Forecast for Lake Ontario National Weather Service Buffalo NY 1050 AM EDT Tue Jun 6 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...A large area of high pressure of 30.4 inches centered over Hudson Bay today will extend a ridge of 30.1 inches southward across the Upper Great Lakes tonight through Friday. Meanwhile, low pressure of 29.2 inches over Nova Scotia today will drift west across the Gulf of Maine the rest of the week while weakening to 29.6 inches. This weekend a cold front averaging 29.7 inches will shift from the upper Great Lakes on Saturday to the lower Great Lakes on Sunday. LOZ061-062115- MAFOR 0615/ ONTARIO WEST 1/2 13710 12810 13710. Waves 1 to 3 feet. ONTARIO EAST 1/2 11710 11610 15710. Waves 1 to 3 feet. $$