BUFFALO, New York — Black Friday was giving way to a white weekend in parts of New York State, with the first big snow of the season threatening to bury towns along lakes Erie and Ontario during a hectic holiday travel and shopping weekend.
As flakes began flying Friday, forecasters warned 4 to 6 feet (1.2 to 1.8 meters) of blowing and drifting snow could fall in Watertown and other areas east of Lake Ontario through Monday.
After an unusually mild fall, as much as 2 to 3 feet (0.6 to 0.9 meters) of snow were possible along Lake Erie and south of Buffalo from lake-effect bands notorious for pummeling the region with snowfall rates of 2 to 4 inches (5 to 10 centimeters) per hour. Lake-effect snow happens when warm moist air rising from a body of water mixes with cold dry air overhead.
“The lake is 50 degrees (10 degrees Celsius). We’re …