Rank probability skill score (RPSS) for hindcasts of (a) FREQ15 and (b) APD constructed from the Chilean NHMM simulations. Numerical values are multiplied by 100, to be in percent, with 100 being a perfect score, and 0 corresponding to random guessing. The median RPSS across all years is shown. See (Verbist et al. 2010) for details. Reproduced from (Verbist et al. 2010).