WRF data

Output data from the Weather Research and Forecasting (WRF) Model is some distance from being CF compliant. A Python script is available, from the University of Cantabria, that converts WRF data into CF netCDF. The Python script can be downloaded from http://www.meteo.unican.es/wiki/cordexwrf/SoftwareTools/WrfncXnj

Our input file here is called wrf.nc. As the file is large at 5GB this file isn't distributed and this is a worked example of what is needed.

python wrfncxnj.py -v T2 -o wrf2.nc wrf.nc

We now have a CF netCDF file with the temperature at 2m which can be readily manipulated and plotted using cf-python and cf-plot.

Example 43 - plotting WRF data

import cf
import cfplot as cfp
f=cf.read('wrf2.nc')[0]
t2=f.subspace(time=cf.dt('2016-12-25'))
t2.units='degC'
cfp.con(t2, lines=False)