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/4136#issuecomment-649968866,https://api.github.com/repos/pydata/xarray/issues/4136,649968866,MDEyOklzc3VlQ29tbWVudDY0OTk2ODg2Ng==,1217238,2020-06-26T05:05:48Z,2020-06-26T05:05:48Z,MEMBER,"Dimensions on the outputs of an xarray operations are picked based on their order of appearance in the arguments.

In this case, I agree that it's somewhat surprising, but putting `lon` first is consistent with the order of dimensions in the function call `xr.where(y.lon < 1, y, -1)`.

If you want to preserve the original dimensions order, one way to achieve this would be to use the `where` _method_ instead, i.e., 
```
>>> y.where(y.lon < 1, -1)
<xarray.DataArray 'sst' (lat: 3, lon: 3)>
array([[-1., -1., -1.],
       [-1., -1., -1.],
       [-1., -1., -1.]])
Coordinates:
  * lat      (lat) int64 0 1 2
  * lon      (lon) int64 10 11 12
```","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,636029447