I looked on NESH and Mount Snow last went beyond the 24th in '07-08 when they made it to the 27th.
As much as people love to rag on "Mt. Blow" they are in a pretty good snow belt and can usually eek out more than Stratton, Okemo, and Magic. The big caveat being temperatures. I can remember a lot of years with good natural snow and "normal" temperature springs Mount Snow could go far. Much of their natural terrain is also narrow/shady. This is all compared to their competition...Okemo/Stratton.
It's not really ragging on them, it's just stating the simple reality that given the current snow depths and weather outlook, the 24th is a huge stretch. What used to happen is pretty much out the window now with the Vail operation