Tropical Depression 17E


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              
     20170914 200737 -930.0      N/A   N/A     N/A    0.00  40.0  AMSR2  17.6  109.3   17.6  109.3   17.7  109.3 Analysis Plot     
     20170915 011600   -1.0      N/A   5.5%  33.33     .96  40.0 SSMI17  18.0  109.3   18.0  109.3   18.1  109.1 Analysis Plot     
     20170915 011600   -0.0      N/A   N/A     N/A    0.00  40.0 SSMI17  18.2  109.3   18.2  109.3   18.2  109.2 Analysis Plot     
     20170915 060916 -930.0      N/A   N/A     N/A    0.00  40.0    GMI  18.5  109.3   18.5  109.3   17.8  109.3 Analysis Plot     
     20170915 103147   -6.9      N/A  31.5%  99.99    6.89  45.0 SSMI15  18.7  109.7   18.7  109.7   18.4  109.7 Analysis Plot     
     20170915 121500  -14.9      N/A  45.2%  88.88   14.86  45.0 SSMI16  18.7  109.7   18.6  109.5   18.6  109.5 Analysis Plot     
     20170915 134900    9.2      N/A  24.7% 188.87    9.23  55.0 SSMI17  18.7  109.7   18.6  109.9   18.6  109.9 Analysis Plot     
     20170915 204925   -0.0      N/A   N/A     N/A    0.00  60.0  AMSR2  18.9  110.1   18.9  110.1   18.9  110.1 Analysis Plot     
     20170916 010400 -930.0      N/A   N/A     N/A    0.00  60.0 SSMI17  19.0  110.2   19.0  110.2   18.9  109.9 Analysis Plot     
     20170916 015300    6.6      N/A  17.8%  44.44    6.61  60.0 SSMI18  19.0  110.2   19.0  110.2   18.7  110.2 Analysis Plot     
     20170916 101720 -930.0      N/A   N/A     N/A    0.00  65.0 SSMI15  19.0  110.2   19.0  110.2   19.0  110.1 Analysis Plot     
     20170916 164139 -930.0      N/A   N/A     N/A    0.00  65.0    GMI  19.4  110.1   19.4  110.1   19.1  110.3 Analysis Plot     
     20170917 141400   -3.0      N/A  28.8% 155.54    2.98  40.0 SSMI18  20.9  110.5   20.9  110.5   20.9  110.5 Analysis Plot     
     20170917 233400   -5.1      N/A  11.0% 111.10    5.12  45.0 SSMI16  21.1  111.2   21.1  111.2   21.2  111.1 Analysis Plot     
     20170918 084818   -2.7      N/A  39.7%  88.88    2.73  45.0  AMSR2  21.4  111.8   21.4  111.8   21.2  111.7 Analysis Plot     
     20170918 140100   -5.0      N/A   9.6% 211.09    4.99  45.0 SSMI18  21.4  112.1   21.4  112.1   21.1  112.2 Analysis Plot     
     20170918 163137 -930.0      N/A   N/A     N/A    0.00  45.0    GMI  21.4  112.2   21.4  112.2   21.9  112.3 Analysis Plot     
     20170918 163143 -930.0      N/A   N/A     N/A    0.00  45.0    GMI  21.4  112.3   21.4  112.3   21.3  112.6 Analysis Plot     
     20170919 011700   -4.1      N/A   9.6% 144.43    4.12  35.0 SSMI18  21.7  113.6   21.7  113.6   21.2  113.3 Analysis Plot     
     20170919 020500   -5.9      N/A   9.6% 166.65    5.91  35.0 SSMI17  21.7  113.7   21.7  113.7   21.3  113.5 Analysis Plot     
     20170919 055055   -5.1      N/A   N/A  222.20    5.14  35.0    GMI  21.8  114.0   21.8  114.0   21.4  113.7 Analysis Plot     
     20170919 111318   -1.4      N/A   5.5% 133.32    1.43  30.0 SSMI15  21.6  114.1   21.6  114.1   21.5  114.2 Analysis Plot     
     20170919 143600   -2.4      N/A   6.8% 177.76    2.42  30.0 SSMI17  21.6  114.5   21.6  114.5   21.8  114.5 Analysis Plot     
     20170919 230800   -3.4      N/A   N/A  177.76    3.42  30.0 SSMI16  21.9  115.0   21.9  115.0   21.9  115.5 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.