PQPF ( Probabilistic Quantitative Precipitation Forecast ) is ensemble based probabilistic precipitation forecast by different threshold (inch/mm). Fig. is a typical example of PQPF forecast maps of United States. The calculation is based on the percentile of ensemble members predicted exceeding give threshold amount during the period. Or you may use the distribution function such as l-moment, etc to do this.

CPQPF ( Calibrated PQPF ) is the PQPF production after calibration. There are many ways to do calibration, we are working on this project now.