(WSYR-TV, Syracuse) Northwest winds have been importing cold, Canadian air. When the cold air passes over the relatively warm Lake Ontario (lake temps still in the upper 40s), it absorbs moisture like a sponge and drops it over the land in the form of lake effect snow.
Today’s lake effect snow will be more organized than what we saw on Saturday, so expect steadier snow to fall with possible greater accumulations. Through the early part of the day, snow will stretch from Northern Cayuga County down towards Norwich. From here, the band will lift northwards and drop most of its snow east of Lake Ontario over the Tug Hill. Snow is expected to intensify as it lifts, meaning 2-4” of additional accumulation is possible by this evening. Elsewhere, expect 1-2”.
When lake effect snow gets started, it is hard to get it to quit. While high pressure tries to build in on Sunday afternoon, it likely won’t be enough to staunch the snowfall over the Tug Hill region. Expect snowfall to last north of Syracuse through early Monday before it drops to the southeast of Lake Ontario again Monday afternoon.