Grid-Stat Tool: General

Grid-Stat Functionality

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 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 forecast field prior to verifying it. The output statistics generated by Grid-Stat are largely the same as those generated by Point-Stat.

Grid-Stat Usage

View the usage statement for Grid-Stat by simply typing the following:

bin/grid_stat

At a minimum, the input fcst_file in GRIB or NetCDF format (from PCP-Combine), the input obs_file in GRIB or NetCDF format (from PCP-Combine), 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 prior to running Grid-Stat. The copygb utility is recommnded for regridding files in GRIB format.