Marker for tropical cyclone

Hi:
I want to add the location of tropical cyclones using
gsn_add_polymarker. How do I specify gsMarkerIndex so it looks like the
symbol usually used for a tropical cycle? I was looking at the different
markers but do not see it. Thanks,
Laura

-- 
!----------------------------------------------------
  Laura D. Fowler
  Mesoscale and Microscale Meteorology Division (MMM)
  National Center for Atmospheric Research
  P.O. Box 3000, Boulder CO 80307-3000
  e-mail: laura@ucar.edu
  phone : 303-497-1628
!----------------------------------------------------
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