The Meso-Scale Ensemble Prediction System (MEPS) is being developed at JMA and has been implemented in test operation since March 2015. The MEPS-based guidance is also in test operation and is used by forecasters as reference information. The elements of guidance are precipitation amount, wind speed, temperature, snowfall amount, visibility, low cloud and probability of thunderstorms. The guidance of each ensemble member is calculated simply same as the deterministic forecast guidance. We validated the member's mean and probability density distribution and confirmed some improvements.
This presentation shows the outline of MEPS-based guidance, the result of forecast verification, and the usage.