12Z AI getting it's act together for the 20th. Not quite there but it's headed toward a big event. Scroll forward. All precip is snow thru the 23rd.
https://charts.ecmwf.int/products/aifs_medium-mslp-rain?base_time=202502111200&interval=12&projection=opencharts_north_america&valid_time=202502191200
Scroll this forward. There aren't any nice 500mb map depictions on the Euro site. Wait for TT.
https://charts.ecmwf.int/products/aifs_medium-mslp-rain?base_time=202502110600&interval=6&projection=opencharts_north_america&valid_time=202502181800
It's a mess. This is the 3rd run in a row with 2 areas of precip and main area is a low offshore that clips ENE. I didn't bother posting because you know it does crazy stuff post day 5 like all modeling.
I've been using the SST maps at Cyclonic weather for a couple years, but their radar and sat stuff looks pretty good too.
https://cyclonicwx.com/floater/us/ir/
https://cyclonicwx.com/radar/neus/
Actually, slp mean is clearly offshore, but I think those few deep, inland Eps member may be skewing the snowfall mean.
EDIT: Like that 975mb over DC. Lol