16 of those 30 years Central Park failed to reach 20 inches (> 50% of the winters during that 30 year stretch).
Excluding this season, Central Park reached 20 inches 2 out of the 6 seasons (30%). 1 of those winters did not have a KU, so 50% of the 20+ winters did not have a KU.
I am not pointing out the above to dispute, only to reiterate that 6 years is an extremely small sample size.
Perhaps we are mirroring 1970 through 1999, however now we are reaching 20 inches 30% of the time instead of 46% of the time (50% of those needing a KU). However again 6 years is an extremely small sample size).