Analysis of Snow Climatology

How this map was made:

Since exact dates, rather than months, delimit the snow accumulation season, the technique to generate these statistics incorporated whole month and partial-month snowfall totals. Whole month snowfall totals(Dec., Jan., Feb.) could be used for all stations, however a weighted fraction of the monthly snowfall was used when the onset and/or end date fell within a month. This fraction was based on the number of days in a particular month that was included in the snow accumulation season. Therefore, since the snow accumulation season is variable throughout the state, snowfall totals must be compiled from unequal time periods for each station.

For each snowfall total for the snow accumulation season, one gridded map was generated based on the individual station observations using a kriging technique. From this, a software procedure ranked the snowfall totals based on the entire distribution for the given number of seasons to a reference of 32in. The 32in. statistic for each gridpoint is given such that the value represents the percent observations that are less than 32 in. Negative values indicate that no observations are below this value.