html_url,issue_url,id,node_id,user,created_at,updated_at,author_association,body,reactions,performed_via_github_app,issue https://github.com/pydata/xarray/issues/6512#issuecomment-1109248716,https://api.github.com/repos/pydata/xarray/issues/6512,1109248716,IC_kwDOAMm_X85CHcrM,56264363,2022-04-26T02:58:39Z,2022-04-26T02:58:39Z,NONE,"here is the `xr.show_versions()` ``` >>> xr.show_versions() INSTALLED VERSIONS ------------------ commit: None python: 3.8.13 | packaged by conda-forge | (default, Mar 25 2022, 06:06:49) [Clang 12.0.1 ] python-bits: 64 OS: Darwin OS-release: 21.4.0 machine: x86_64 processor: i386 byteorder: little LC_ALL: None LANG: en_US.UTF-8 LOCALE: ('en_US', 'UTF-8') libhdf5: 1.12.1 libnetcdf: 4.8.1 xarray: 0.19.0 pandas: 1.3.2 numpy: 1.20.3 scipy: 1.7.1 netCDF4: 1.5.7 pydap: installed h5netcdf: 1.0.0 h5py: 3.6.0 Nio: None zarr: 2.11.3 cftime: 1.5.1 nc_time_axis: None PseudoNetCDF: None rasterio: 1.2.9 cfgrib: 0.9.9.1 iris: None bottleneck: None dask: 2021.10.0 distributed: 2021.10.0 matplotlib: 3.4.3 cartopy: 0.20.0 seaborn: None numbagg: None pint: None setuptools: 52.0.0.post20210125 pip: 21.0.1 conda: None pytest: None IPython: 8.1.1 sphinx: None ``` Here's [2022.grib.zip](https://github.com/pydata/xarray/files/8559356/2022.grib.zip) a file you can use for testing. And I believe this code should satisfy the MCVE request ``` import xarray as xr fp = '2022.grib' with xr.open_dataset(fp, backend_kwargs={'filter_by_keys': {'shortName': 'i10fg'}}) as ds: m = ds.sel(time=ds.time.dt.month.isin([3])) ``` this code produced this [2022.grib.02ccc.idx.zip](https://github.com/pydata/xarray/files/8559372/2022.grib.02ccc.idx.zip) file and it didn't delete it once the code finished running. Please let me know if you need any more info!","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,1214654475