UPP Online Tutorial for UPPV4.1 | Introduction


The UPP software package is provided to the community for the use of post-processing model output. At this time community support is available only for the WRF-ARW and FV3GFS.

The UPP software package:

  • can be used to post-process WRF-ARW and FV3GFS forecasts.
  • can ingest WRF history files (wrfout*) in netCDF format.
  • can ingest FV3GFS history files (dyn*/phys* or gfs*) in binarynemsiompiio and netcdf format.
  • is compatible with WRFv3.7 and higher for Ferrier physics (UPPv3.0+).

The UPP software package consists of:


  • Interpolates the forecasts from the model's native vertical coordinate to NWS standard output levels (e.g. pressure, height) and computes mean sea level pressure. If the requested parameter is on a model's native level, then no vertical interpolation is performed.
  • Computes diagnostic output quantities (e.g. convective available potential energy, helicity, relative humidity).
  • Outputs the results in NWS and WMO standard GRIB1 or GRIB2 format.
  • Destaggers the WRF-ARW forecasts from a C-grid to an A-grid.