The Grid-Stat tool provides verification statistics for a matched forecast and observation grid. All of the forecast gridpoints in the region of interest are matched to observation gridpoints on the same grid. All the matched gridpoints falling inside a verification masking region defined by the user are used to compute the verification statistics. The Grid-Stat tool functions in much the same way as the Point-Stat tool, except that no interpolation is required because the forecasts and observations are on the same grid. However, the interpolation parameters may be used to perform a smoothing operation on the input data prior to verifying it. The output statistics generated by Grid-Stat are largely the same as those generated by Point-Stat.
View the usage statement for Grid-Stat by simply typing the following:
At a minimum, the input gridded fcst_file, the input gridded obs_file, and the configuration config_file must be passed in on the command line.
The forecast and observation fields must be interpolated to a common grid before Grid-Stat can compute statistics. As of version 5.1, the MET tools are able to regrid data on the fly using use the regrid section in the configuration files. Alternatively, users may choose to regrid their entire GRIB1 or GRIB2 files using the copygb and/or wgrib2 utilities.