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/811#issuecomment-203615938,https://api.github.com/repos/pydata/xarray/issues/811,203615938,MDEyOklzc3VlQ29tbWVudDIwMzYxNTkzOA==,10050469,2016-03-30T20:23:03Z,2016-03-30T20:23:03Z,MEMBER,"> Should xarray indexing account for boolean values without resorting to a call to np.where?

as far as I know, it does:

``` python
In [1]: import xarray as xr
In [2]: import numpy as np
In [3]: da = xr.DataArray(np.arange(10), coords={'time':np.arange(10)})
In [4]: da.sel(time=da.time > 4)
Out[4]: 
<xarray.DataArray (time: 5)>
array([5, 6, 7, 8, 9])
Coordinates:
  * time     (time) int64 5 6 7 8 9
```

But according to the traceback it seems to have something to do with the shape or your array?
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