The site displays verification statistics for global NWP forecasts. All data used are on the GRIB G2 (2.5x2.5 degree) grid.

The regions referred to are: G2 (GLB): Globe    NHX: 20N-80N    SHX: 20S-80S    TRO: 20S-20N    PNA: Pacific North America, 180E-320E, 20N-75N   
N60: 60N-90N    S60: 60S-90S   NPO: N.Pacific    SPO: S. Pacific    NAO: N. Atlantic    SAO: S. Atlantic    CAM: Central America    NSA: N. South America

Pattern correlations for all NWP models are computed using anomalies respective to a 30-year (1959-1988) climatology of the NCEP/NCAR reanalysis.