Freezing rain may become mixed with or turn over to ice pellets before potentially tapering off to patchy freezing drizzle for a few hours Saturday night. Total ice accumulation is expected to be less than an inch.
A Winter Weather Advisory in effect from 6 am Saturday through 5 pm Sunday for Jefferson and Lewis Counties, and from 2 pm Saturday through 10 am Sunday for Wayne, northern Cayuga, and Oswego counties.
Scattered power outages and tree damage are possible at times due to ice accumulation. "Travel will be hard".
The Service is forecasting sleet and freezing rain.
Low pressure moving out of Iowa will pass overhead Sunday with colder air changing precipitation over to wet snow, so the Advisory may have to be extended or reissued later Sunday.
"Northeasterly winds will result in significant wave action, which may result in lakeshore flooding and erosion along the southwestern shores of Lake Ontario", the weather service said.
"Dangerous winter driving conditions are expected on untreated roads Saturday and Sunday".