Tropical Depression 16W

Passive Microwave (PMW) Intensity Information
Advanced Dvorak Technique (ADT)
Version 8.2.1


         Overpass     Inten           Ring    Ring          Wind           Forecast        Final        Target  
       Date    Time   Score  Meaning   Pct    Diam  BTdiff   Est   Sat    Lat    Lon    Lat    Lon    Lat    Lon              
     20170824 200900  -23.5      N/A  97.3%  44.44    8.53  35.0 SSMI16  15.1 -125.1   15.1 -125.1   14.9 -124.5 Analysis Plot     
     20170824 220900 -930.0      N/A   N/A     N/A    0.00  35.0 SSMI17  15.2 -124.5   15.2 -124.5   15.8 -124.3 Analysis Plot     
     20170824 224100   -6.7      N/A  39.7% 133.32    6.69  35.0 SSMI18  15.2 -124.4   15.2 -124.4   15.0 -124.2 Analysis Plot     
     20170825 074701 -930.0      N/A   N/A     N/A    0.00  35.0    GMI  15.7 -122.9   15.7 -122.9   15.7 -122.6 Analysis Plot     
     20170825 095300   -0.1      N/A  39.7%  22.22     .10  35.0 SSMI18  16.0 -122.4   16.0 -122.4   15.8 -122.5 Analysis Plot     
     20170825 200822  -17.5      N/A  31.5%  55.55   17.47  35.0 SSMI15  16.9 -121.0   16.9 -121.0   16.4 -120.4 Analysis Plot     
     20170825 210345 -930.0      N/A   N/A     N/A    0.00  35.0    GMI  17.2 -120.6   17.2 -120.6   16.1 -120.9 Analysis Plot     
     20170825 222800   -7.1      N/A  63.0%  22.22    7.13  35.0 SSMI18  17.5 -120.2   17.5 -120.2   16.9 -120.4 Analysis Plot     
     20170826 081200   -2.5      N/A  20.5% 144.43    2.48  40.0 SSMI16  18.4 -118.1   18.4 -118.1   18.6 -117.4 Analysis Plot     
     20170826 105000   -3.6      N/A  13.7% 188.87    3.63  40.0 SSMI17  18.9 -117.2   18.9 -117.2   18.8 -116.6 Analysis Plot     
     20170826 195206 -930.0      N/A   N/A     N/A    0.00  45.0 SSMI15  20.6 -115.1   20.6 -115.1   20.8 -114.9 Analysis Plot     
     20170826 213900   -3.8      N/A  23.5% 277.75    3.82  45.0 SSMI16  20.7 -114.9   20.7 -114.9   20.7 -114.3 Analysis Plot     
     20170827 073309 -930.0      N/A   N/A     N/A    0.00  55.0    GMI  23.0 -111.6   23.0 -111.6   23.4 -112.1 Analysis Plot     
     20170827 075900    4.5      N/A   N/A   33.33    4.45  55.0 SSMI16  22.8 -111.9   22.8 -111.9   23.4 -111.1 Analysis Plot     
     20170827 103800   -0.0      N/A   N/A     N/A    0.00  55.0 SSMI17  23.3 -111.1   23.3 -111.1   23.2 -110.7 Analysis Plot     
     20170827 111200 -930.0      N/A   N/A     N/A    0.00  55.0 SSMI18  23.4 -111.0   23.4 -111.0   23.0 -110.6 Analysis Plot

Legend:

  - Date/Time are determined from PMW imagery at Forecast (initial guess) Lat/Lon position.

  - Positive/Negative Latitude = North/South Hemisphere; Longitude = Western/Eastern Hemisphere.

  - "Ring Diam" value indicates the estimated surface eyewall diameter in km (the MI eyewall edge diameter minus 10 km).

  - "Ring Pct" is the percentage of the "ring" (eyewall inner boundary) that is 1) colder than the "hot spot" (warmest eye pixel) in the eye by 20K, or 2) the percentage that is a) colder than 232K and b) colder than the "hot spot" by 10K, whichever is greater.
  - Values are red if Ring % <= 65, yellow/brown if Ring % <= 85 and green if Ring % > 85.

  - "Tb diff" is the difference between the "hot spot" (warmest eye pixel) and the warmest pixel on the eyewall.

  - Intensity score are listed as negative, and not used, when the JTWC or NHC estimated Vmax is <55 kts in order to rule out weak but highly symmetric TCs.

  - Error messages in intensity scores: -920 is used when the hottest pixel in the eye is <200K, to prevent false positives; -930 means <85% of eyewall has observations/data.