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/4167#issuecomment-647585666,https://api.github.com/repos/pydata/xarray/issues/4167,647585666,MDEyOklzc3VlQ29tbWVudDY0NzU4NTY2Ng==,2448579,2020-06-22T15:20:21Z,2020-06-22T15:20:21Z,MEMBER,"Thanks for filing an issue @NickMortimer .

The transpose call is here and is used because `apply_ufunc` moves dimensions around so that the ""core dimensions"" are the last. The explicit `transpose` then moves the dimensions back to the original order:
https://github.com/pydata/xarray/blob/b9e6a36ff7a0ca3593165cf191f4152666fa4a66/xarray/core/missing.py#L405-L421

Now `transpose_coords=True` is the default in our next release (#3824) so this warning will disappear.

Is there a reason why you want the coordinates to not have the same dimension order as the data? In that case, I would add another transpose call after `ffill` in your code.

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