Forecasting artificially-triggered avalanches in storm snow at a large ski area

► New precipitation was a significant predictor of storm snow avalanches. ► Extended Column Test propagation (ECTP) was also a significant predictor. ► The threshold for ECTP was 29 cm of new snow. ► Waiting 24 h after a storm to use explosives reduced the number/size of avalanches. ► Waiting 24 h also lowered explosive yield.