Not sure if posted yet, updated FD from KBUF
...Heavy Lake Effect Snow Possible Christmas through December
26...
For Friday morning, there should be a brief transition from
ending synoptic snow moving into Central NY and developing lake
effect snow developing on a WSW flow over the lakes. The coldest
aloft will still be upstream and poised to move overhead later
Friday afternoon. So there may be a period Friday morning with a
meager lake response before a full-blown lake response takes
hold. As a result, there`s still quite a bit of uncertainty to
both the start time and placement of lake effect snow.
East of Lake Erie...some models move the band well into the
Northtowns while others place it toward Metro Buffalo Friday
afternoon. Regardless, the coldest airmass should pass overhead
Friday evening and mark the period for the heaviest and most intense
lake effect snow, where 2"/hr and thundersnow will be a possibility
into Friday night as the band settles a little to the south
overnight.
East of Lake Ontario...a similar transition period is expected, with
widespread snow tapering off Friday morning...followed with a lake
response Friday afternoon. The most intense period should be Friday
night and well into Saturday. Similar to Lake Erie however, there`s
still uncertainty placement at this point through Saturday. The
best chance will probably be over/north of the Tug Hill Plateau.
Then another shortwave trough will move across the St Lawrence
valley and should push the band south over and eventually south of
the Tug Hill Plateau.
With concerns noted above, the watch will stand for now until
there`s more confidence in timing and placement along with
corresponding snow amounts.