Encyclopedia

REFS stands for RRFS Ensemble Forecast System. It is not a stand-alone weather model in the way GFS (Global Forecast System), HRRR (High-Resolution Rapid Refresh), or RRFS (Rapid Refresh Forecast System) are. Instead, REFS is the built-in ensemble component of RRFS itself, a way of running RRFS many times with small variations and combining the…