On queue from your note the 0Z HRRR is starting almost everyone off with snow for round two but it is light and borders on negligible along the far southern tier. I know better than to take HRRR qpf amps too seriously but I like watching for trends.
I am (especially for me) a bit worried about the 18Z GFS depiction of it breaking 40 tomorrow. I know in the LSV that can sometimes be overdone but on my side of the mountain it can go up fast. GFS gets the 40 degree line just south of MDT while NAM puts many into the mid 30's. Previously I was thinking it would not break freezing tomorrow but now I am wondering.
Another HRR trend I have noticed is the speed up of the finger of snow (AKA the warm front). At 18Z the snow was just getting into Franklin count at 7AM while now the depiction is for the snow to be breaking out just West of Harrisburg at the same time. A bit more than an hour jump forward.
It's one of "them there" forum splitters. Canderson gets WSW snows while Daxx just has to broom off and and I am getting soap and bucket ready to wash my car in the rain that is going to fall.
SO 18Z GFS is really chincy with snow in my neck of the woods. Basically none. 1-2" for most of the LSV though MDT scores big with 3-4". Discouraging. Many lose 850's before the second batch gets here. Most definitely a trend away from wintry in the 18Z suite started off by the HRR.
The 18Z NAM does not agree with the HRRR so I am more confident in your throw it out statement. The Nam does minor out that first finger of snow though...less than 1" for some now...but has a heavy burst of snow to start off round 2 in the LSV before changeover.
I am seeing the first chink in the armor of the "getting colder" trend. HRR was all frozen at 12Z but has now introduced the second shield starting off as plain rain for southern areas. It erodes the surface temps due to the long pause between precip events. I think it is too warm but regardless a 4-5 degree jump in temps from 12Z for some reason. The HRRR did not too so badly the last event.
And the Rgem is a bit better than its more long term cousin but still warmer than I was expecting. "That's what HRRR" said suggests 2-4" over the LSV before changeover.
Interesting the Canadian is the least wintry of the GFS, NAM, ICON,and itself. Not used to that. Jumps surfaces temps above freezing through 2/3 of PA. That's not going to happen in my opinion but used to having to mute the over exuberance of it.
Nam follows up the 1-2" of snow with 6 solid hours of sleet with maybe a little Frz at the end for far south. Second round continues to start just after noon for Western LSV.
12Z Nam continues the finger of snow to start of festivities around day break tomorrow. Moderate snow at that. Would make travel a bit difficult from the 7-10AM time slow in the LSV.
It makes it to NY west of us but only to Williamsport area eastern half of the state. Very quickly reaches down post storm as mag has been pointing out.