NWS discussion
The final wave of low pressure with this long-stalled frontal
boundary is now trending further north and west in latest
guidance. Some solutions now show a rather significant snowfall
especially from DC on south and east for late Sunday night into
Monday. This is rather concerning and latest guidance will be
closely reviewed overnight for possible advisory, or even watch,
issuance, if necessary. For now, have only trended POPs and
snowfall further north, with likely pops into DC metro and a
light accumulation.