/home/critechuser/cycloneSurge/Python/vtcalc.py:19: FutureWarning: comparison to `None` will result in an elementwise object comparison in the future.
  if lon == None :

****************
[  0.   9.  21.  33.  45.  69.]
[-64.  -61.5 -57.6 -53.2 -47.9 -35. ]

****************