Assuming there actually is a -AO/-NAO flip around 3/20 (Equinox), I wouldn’t say there’s still plenty of time for NYC metro area snowstorms at that point. Have they happened 3/20 and beyond? Yes. Would I gamble that there’s going to be a NYC snowstorm pattern setting up 3/20 - early April? Not so much. After 3/15, south of New England, it’s very late for that. Obviously not impossible and has happened before with anomalous, freak snowstorms, but yea…..