First and likely final snow accumulations map covering the synoptic event combined with potential lake effect where applicable. This timeframe covers thru Monday Evening when the bulk of the action should finally be winding down, both with the synoptic event and expected Lake Effect event on the backside.
We could potentially see an expansion of 2-5" across the NY/PA/NJ corridor depending on how far south the secondary develops from what the model guidance shows. As of now, best chance for 2-4" will be along/east of I-81 and north of I-80 in Northeast PA northward into Central NY.
Across Northeastern New York and the northern half of New England, this is where the bulk of the snow is expected to fall. Current thinking is that most areas should stay at or under 20" from the synoptic event. That said, expectation is that there will be significant upsloping/terrain-induced snowfall following the end of the synoptic snowfall across the mountains/hills of Northeastern VT, Northern NH, and Western/Northern Maine that will carry on during much of the day on Monday. When all is said and done, this will result in total snowfall amounts reaching or exceeding 24" in localized areas. This is represented by the hollow dashed maroon zone of 20-30" which signifies an area where upwards of 20" is possible, but only localized and not widespread enough to fill in.
Concerning lake effect potential do, we have inserted a swath of 5-10" downwind of Lake Ontario with a localized highlight over parts of Oswego/Oneida/Madison/Onondaga counties where amounts could exceed 10". This is signified by a dashed hollow purple zone corresponding to the purple range of 10-20" seen in the legend. Again, dashed and unfilled signifies local amounts expected within that range, but not expected to be widespread enough to fill in.
...LTE
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