My snow thing is to watch heavy snow fall, get out in it while it’s fresh, then count the minutes till it’s gone so I don’t have to worry about breaking bones on the ice.
No. Maybe day of event but NAM is never a complete go to except under certain circumstances-maybe severe wx. That’s an old myth about tossing the euro/gfs close in. I believed it but learned otherwise.
All of those clown maps are guesses and produced by the vendor, not the model. I would advise ignoring them and looking at soundings, snow growth, and qpf.
My wife (who is in Chicago caring for her mom for the past several weeks) asked how much snow is Boston getting Sunday? My answer is anywhere from 4-10 inches and probably somewhere in the middle of that range. Meaning snowblower gets used.