HEC-MetVue does not currently support reading multiple time-steps, or reading multiple variables, from NetCDF/GRIB files. Current support for reading multiple time-steps and variables from a NetCDF/GRIB file is performed through the command line utility NCGribExtractor. The NCGribExtractor takes NetCDF/GRIB files as arguments, and splits their data into multiple flt files, which HEC-MetVue can then read. This command line utility also relies on the SupportedDataFormatDefinitions.json file, and therefore it is often helpful to attempt to load the data in the HEC-MetVue application, then specify an entry in the Data Format Resource Editor prior to using the command line utility. An example batch file is packaged with HEC-MetVue distribution packages under the “utilities” directory named “NCGribExtractor.cmd”. Running this script unedited will print the inline documentation to the command prompt. This utility ingests the “inputFile” or “info” argument at a minimum. When using the “info” argument, the contents of the file will be printed to the command prompt window. When using only the “inputFile” argument, all readable variables, for all time-steps and layers, are converted to flt files within the directory of the input file. If the “variable” argument is used, only the variable of the provided name will be extracted. Similarly, if the “layerNumber” argument is used, only the specified layer will be extracted. The “rateToDepth” argument is a special argument that designates the utility to convert data from a precipitation rate to a depth over each time-step. This is helpful as many climate forecast products provide precipitation rates instead of the more hydrologically useful precipitation depth. Finally, the “outputDirectory” argument provides a directory to which the output files will be saved.