MET Online Tutorial

MET Online Tutorial for METv3.0

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 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.

Please see the METv3.0 release notes for a description of new features in Grid-Stat for this release.

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 pinterp or PCP-Combine), the input obs_file in GRIB or NetCDF format (from pinterp or 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.