Lots of these to be fixed before xarray can be upgraded to 0.12:
/usr/lib64/python2.7/site-packages/wavespectra/input/ncswan.py:38: FutureWarning: The inplace argument has been deprecated and will be removed in xarray 0.12.0.
'depth': attrs.DEPNAME}, inplace=True)
Lots of these to be fixed before xarray can be upgraded to 0.12: