/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.  12.  24.  36.  48.  72.]
[ 75.4  75.2  74.7  74.1  73.2  71. ]

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