/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.  57.  69.]
[-61.7 -61.6 -59.  -53.9 -45.6 -34.  -24. ]

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