A deep area of low pressure near Burlington Vermont this evening will track north into Canada tonight. Even though the storm is departing, we will see an increase in northwesterly winds around the storm, circulating more moisture back into central New York later tonight and tomorrow. Combine that with colder and colder air aloft moving over Lake Ontario and you have the recipe for steadier, even heavier, snow later tonight and the first half of the day tomorrow.
The deepest wrap around moisture will start to pull out of central New York tomorrow afternoon. We don’t think the snow will end during this time but it will begin to ease. The total amount of snow that falls tonight will be 1-3” with another 3-6” expected tomorrow with the greatest amounts most probable over the hills of Central New York. Additional accumulation is possible Saturday night as the snow eases.
Along with the snow later tonight and tomorrow will come an increase in wind. Northwesterly winds will gust past 30 mph will create several problems. First, it will blow the falling snow around creating low visibilities and drifting snow at times. Also, expect wind chills in the teen or even lower and finally it is not out of the question that there could be some isolated power outages.
As for Sunday and beyond, indications are a weak cold front will attempt to drop southeast from Canada. The combination of the cold front itself, the leading edge to colder air, and the chilly air behind the front, may trigger more lake effect snow showers and/or squalls.
Dry weather should return Christmas Eve, with some snow possible Christmas Day as a weak system passes to our south. Just a heads up for after Christmas: A new storm will be headed toward the East Coast, possibly bringing widespread snow to the Northeast later Wednesday into Thursday