When the average snowfall is figured out by NOAA or the Weather Bureau, it is done in 30 year increments. The 1981-2010 time period averaged, I believe, 25.5 inches in Central Park. It is now time for this to be redone for the new 30 year time period from 1991 to 2020. The new average should be about 29.8 inches. This is quite an increase.