Write wrfout files from wrf projection to readable projection system

[SubhadipDatta]

`import xarray as xr
import xwrf
import metpy # pip/conda install xwrf
import rioxarray as rio # only needed if you want true reprojection
from pyproj import CRS
from metpy.calc import wind_speed, wind_direction
ds = xr.open_mfdataset(
r".\wrfout_d04*",
engine="netcdf4",
concat_dim="Time",
combine="nested",
).xwrf.postprocess()
ds = ds.xwrf.destagger()

ds.to_netcdf(r".\mergeed.nc")`

I am unable to write the File with post processing, my main goal is to write the file with readable projection from wrfprojection.

I am getting error:
ValueError: unable to infer dtype on variable 'wrf_projection'; xarray cannot serialize arbitrary Python objects

[thgeorgiou]

Hello!

Xarray doesn't know how to serialise the wrf_projection variable, just do ds = ds.drop_vars('wrf_projection') before you save the file.