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Cooperative Institute for Meteorological Satellite Studies / University of Wisconsin-Madison
Advanced Dvorak Technique (ADT)
Validation Product Information
  • Statistics in the Atlantic utilize the NHC Working Best Track information for intensity and position information. Best Track data must be within +/- 3 hours of an aircraft reconnaissance center fix data point.
  • Statistics in the Eastern Pacific utiize the NHC and/or CPHC Working Best Track information for intensity and position information. No contingency on aircraft reconnaissance is employed.
  • Statistics in the Western Pacific, Indian Ocean, and Southern Pacific utiize the JTWC Working Best Track information for intensity and position information. No contingency on aircraft reconnaissance is employed.
  • Statistics are ADT minus Best Track.

  • Atlantic storms include WMO Basin ID value "L".
  • East Pacific storms include WMO Basin ID values "E" and "C".
  • West Pacific storms include WMO Basin ID value "W".
  • South Pacific storms include WMO Basin ID values "P" and "S".
  • Indian Ocean storms include WMO Basin ID values "A" and "B".

  • Intensity histogram bins are centered upon the value specified. The exact bin extents are (in knots):
    <-20 :     ≤-22.5
    -20 : >-22.5 to ≤-17.5
    -15 : >-17.5 to ≤ -12.5
    -10 : >-12.5 to ≤ -7.5
    -5 : >-7.5 to ≤ -2.5
    0 : >-2.5 to ≤ +2.5
    +5 : >+2.5 to ≤ +7.5
    +10 : >+7.5 to ≤ +12.5
    +15 : >+12.5 to ≤ +17.5
    +20 : >+17.5 to ≤ +22.5
    >20 : ≥+22.5    
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