shelling (a fall of snow on the back of a sheep)
flother (a flake of snow)
windcrust (a crust formed on the surface of soft snow by the wind)
hap (a heavy fall of snow)
besnow (to cover or whiten with snow)
reek (a pile of snow)
penitent (a spike or pinnacle of compact snow that has been sculpted by the elements)
whited (covered with snow)
blind-drift (a drift of heavy snow)
mafting (drifting snow)
balter (snow adhering to horses’ hooves)
blunk (to snow lightly)
snittering (the fall of snow)
plodgy (of deep snow that’s not yet trodden down)
oversnow (whiten over with snow)
hogamadog (a huge ball of snow made by boys rolling a snowball over soft snow)
eggblatbagbee's blog 
This list would have come in very useful last winter in Boston. Hopefully this winter we won’t need it, but I’ll keep it handy!