Central PA - Winter 2020/2021 Part 2 in Upstate New York/Pennsylvania Posted February 7 1 minute ago, Wmsptwx said: What’s this week ahead looking like? Hearing a bunch of threats but not sure what days specifically. Possibly some kind of a light event Tuesday, with some light snow streaking across PA (perhaps light mix southern tier depending on the model). It seems the bigger trouble brewing will be late week in the Thur/Fri timeframe. This is looking like a drawn out warm advection type event at first with an eventual wave(s) of low pressure coming up towards PA. My concern with this setup is given the gradient pattern and the arctic air nearby is it looks like quite a favorable setup for having a significant icing swath. Not necessarily here, but somewhere. 18z GFS for instance mainly snow with this while the afternoon Euro run had alot of ice into PA. Those details are impossible to nail down at this point, but that Thur-Fri timeframe looks to be where the next more significant precip event materializes. Also the question of cold air, as the big time arctic air is on the playing field but trying to figure out how much eventually releases into the eastern US. Models have literally been all over the temperature spectrum, from the mixing events and temps near somewhat above freezing at times to throwing the whole polar vortex over the Great Lakes/NE and what would likely be record cold. Still going to be pretty cold immediately behind tomorrow's system but the significant arctic cold that was looking to happen earlier this coming week now looks to hold off to perhaps D6-7 or so. Guidance is having alot of trouble handling location of the gradient/storm track and the longwave pattern in general.