The Erie County Sheriff's Office said accumulations in the eastern end of the county had already caused three minor accidents around Akron, and deputies were advising caution.
Portions of the Northeast, Midwest, mid-South and Appalachians may also see light snow late in the week.
"It will stay in place for the next few hours and then make its way to the Southtowns after dark", Zaff said.
By Wednesday evening, the winds will begin to shift to a more westerly direction, allowing for the plume of lake-effect snow to be directed to areas east of Lake Erie in Lake Ontario. "It will be one semi-continuous band between now and Friday".
Temperatures will fall into the low-mid 30s tomorrow afternoon and continue well below average for the rest of the week and into the weekend
Heavy lake-effect snow will affect the Great Lakes, including the Buffalo metro area.
You need several ingredients for lake effect snow.
A lake effect snow warning for Wyoming, Chautauqua, Cattaraugus and southern Erie counties remains in effect from 7 tonight through 7 a.m. Friday.
The extended period shows an upper-level low sitting over the region and the great lakes Saturday the 16, that keeps a chance of scattered snow showers and lake effect snow in for the first half of that weekend.
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This is expected to be a big problem for parts of New York State this week.
Additional Eastern Snow Chances Ahead?
Overall this forecast can be summed up as cold, and rather dry - even with snow chances, there is not a lot of moisture to work with here for the next 10 days.
A disturbance racing our way out of Canada will bring accumulating snow the entire area Friday night into Saturday. This is not expected to be a major snow event because the track of the low will be too far offshore.
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Much colder air has moved into the state and will park here for a while.
Wednesday night: Partly cloudy skies early will give way to cloudy skies late.
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