BUFFALO, N.Y. — 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 about six degrees above where we should be this time of year, that's why we're seeing these heavy lake-effect events,'' Erie County Public Works Commissioner William Geary said. ''The outlook for the next two weeks into December, we'll probably see some more.''
Gov. Kathy Hochul declared a disaster emergency for the targeted counties, allowing state agencies to mobilize resources. Rapidly deteriorating conditions Friday caused closures along Interstate 90, and tandem and commercial vehicles were banned from Interstate 86 in western New York and much of state Route 219 beginning Friday afternoon.
''There's a considerable number of vehicles going off the road on the 219 currently,'' Gregory Butcher, Erie County's deputy director for preparedness and homeland security, said at an afternoon briefing. He said ATVs and snowmobiles were being placed around the county to help first responders if necessary.
The Buffalo Bills called for volunteers potentially willing to shovel snow at Highmark Stadium, where over 2 feet (0.6 meters) of snow was possible before Sunday night's game against the San Francisco 49ers. Earlier this year, a major lake-effect storm forced the NFL to push back the Bills wild-card playoff home game against Pittsburgh from Jan. 14 to Jan. 15.
''It's going to be slow going, there's no doubt about that,'' Erie County Executive Mark Poloncarz said, adding the heaviest snow is expected to be over by kickoff.