issue_comments: 828683287

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https://github.com/pydata/xarray/issues/5023#issuecomment-828683287 https://api.github.com/repos/pydata/xarray/issues/5023 828683287 MDEyOklzc3VlQ29tbWVudDgyODY4MzI4Nw== 7237617 2021-04-28T18:30:46Z 2021-04-28T18:30:46Z NONE

Thanks @dcherian ```

ds = xr.open_mfdataset(NCs_urls, engine='netcdf4', parallel=True, concat_dim='XTIME', )

ValueError: Could not find any dimension coordinates to use to order the datasets for concatenation ```

So it doesn't work, but perhaps that's not surprising give that 'XTIME' is a coordinate, but 'Time' is the dimension (one of WRF's quirks related to staggered grids and moving nests).

```

print(ds.coords)

Coordinates: XLAT (Time, south_north, west_east) float32 dask.array<chunksize=(8, 1035, 675), meta=np.ndarray> XLONG (Time, south_north, west_east) float32 dask.array<chunksize=(8, 1035, 675), meta=np.ndarray> XTIME (Time) datetime64[ns] dask.array<chunksize=(8,), meta=np.ndarray> XLAT_U (Time, south_north, west_east_stag) float32 dask.array<chunksize=(8, 1035, 676), meta=np.ndarray> XLONG_U (Time, south_north, west_east_stag) float32 dask.array<chunksize=(8, 1035, 676), meta=np.ndarray> XLAT_V (Time, south_north_stag, west_east) float32 dask.array<chunksize=(8, 1036, 675), meta=np.ndarray> XLONG_V (Time, south_north_stag, west_east) float32 dask.array<chunksize=(8, 1036, 675), meta=np.ndarray> ```

As such, I'm following the documentation to add a preprocessor ds.swap_dims({'Time':'XTIME'}), which works as expected.

Thanks for everyone's help! Shall I close this? (as it was never actually an issue?

 
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