-AO for sure, NAO I'm not as concerned about. What would be helpful is a list of all 4"+ NYC March-April storms and which teleconnections were present to get a better idea of what you'd need for late season snow.
There's no mechanism for that. AO needs to go negative and I don't see that. Colder air is WPO driven with PV on our side of the globe.
Probably a lot of lakes cutters, active start to severe weather season
Next week especially midweek does look record warm. Is that exaggerated, perhaps but down in Jersey we saw 80F in Feb 2018 so it's definitely on the table.
80s to snow?
The problem is the PV is on our side of the world so it wouldn't take much for cold air to seep south.
March is very fickle. We could touch 80+ and see snow a week later. We actually did that in 2018 when Feb saw 80 and then we know what happened next.
I'm not saying we're getting snowstorms but the window hasn't completely closed.
Take a look at the 5 day EPS anomalies. Massive blowtorch signal. 2012 type stuff
Anyone that thinks it's just a 1-2 day warmup is fooling themselves
That being said. I do think it'll turn a lot colder end of March especially the last week. I also think March will have the warmest anomalies of the year.
April-May will be a lot colder and even BN