Under the ‘two-thirds’ rule…forecasters who have entered at least four forecasts are included in this season/s third Interim Standings.
SUMSQ errors for each contest storm are normalized with a 'Z-score'...then averaged...to compute the standings. Lower (higher) average Z-scores indicate more (less) skillful forecasts.
If a forecaster has participated in more than two-thirds of all contests...then Z-scores from their 'best two-thirds' forecasts are used to calculate Interim and Final standings. More or less the same idea as dropping the lowest quiz score(s) before the final grade is computed.
Complete table of Interim stats by Forecaster at the Contest/s web site here.
Forecaster summary storm data set here.
CONTEST STATUS - Updated: SUN...20-JUL-14 @ 7:35 PM EDT
Winter '14 / '15 - Snowfall Forecast Contests
16th Annual 'Regular Season'
14th Annual 'Season-total'