Tropical Depression 08W

Passive Microwave (PMW) Intensity Information
Advanced Dvorak Technique (ADT)
Version 8.1.4
 

         Overpass     Inten           Ring    Ring          Wind           Forecast        Final        Target  
       Date    Time   Score  Meaning   Pct    Diam  BTdiff   Est   Sat    Lat    Lon    Lat    Lon    Lat    Lon              
     20130715 214100   -3.1      N/A  61.6% 199.98    3.07  25.0 SSMI17  15.4 -124.5   15.4 -124.5   14.8 -124.8 Analysis Plot     
     20130715 232700 -930.0      N/A   N/A  222.20    2.26  25.0 SSMI18  15.5 -124.4   15.5 -124.4   15.9 -123.7 Analysis Plot     
     20130716 082916   -4.7      N/A  26.0%  44.44    4.70  25.0 SSMI15  15.9 -124.1   15.9 -124.1   16.3 -123.8 Analysis Plot     
     20130716 085400   -2.3      N/A  28.8%  33.33    2.26  25.0 SSMI17  15.8 -124.0   15.8 -124.0   16.1 -123.7 Analysis Plot     
     20130716 092100 -930.0      N/A   N/A   44.44   22.77  25.0 SSMI16  15.9 -123.9   15.9 -123.9   16.6 -124.0 Analysis Plot     
     20130716 114508 -930.0      N/A   N/A   44.44    3.92  25.0   TRMM  16.2 -123.7   16.2 -123.7   17.0 -123.6 Analysis Plot     
     20130716 201008   -0.8      N/A  54.8%  55.55     .85  25.0 SSMI15  17.3 -122.9   17.3 -122.9   17.5 -122.3 Analysis Plot     
     20130716 212900   -0.2      N/A   5.5%  44.44     .19  25.0 SSMI17  17.6 -122.6   17.6 -122.6   17.7 -121.8 Analysis Plot     
     20130717 090800 -930.0      N/A   N/A  288.86    5.63  35.0 SSMI16  19.8 -120.9   19.8 -120.9   19.9 -119.9 Analysis Plot     
     20130717 104910 -930.0      N/A   N/A   22.22    6.92  35.0   TRMM  20.1 -120.6   20.1 -120.6   19.8 -120.0 Analysis Plot     
     20130717 120900   -4.3      N/A  20.5%  77.77    4.26  35.0 SSMI18  20.3 -120.4   20.3 -120.4   20.0 -120.8 Analysis Plot     
     20130717 185846   -6.4      N/A   N/A  177.76    6.39  40.0   TRMM  21.6 -118.0   21.6 -118.0   21.6 -118.2 Analysis Plot     
     20130717 214100   -1.1      N/A   N/A   11.11    1.08  40.0 SSMI16  22.2 -117.5   22.2 -117.5   21.9 -117.6 Analysis Plot     
     20130718 004100   -0.2      N/A  27.4% 144.43     .23  40.0 SSMI18  22.9 -117.2   22.9 -117.2   22.0 -117.4 Analysis Plot     
     20130718 085700 -930.0      N/A   N/A  311.08   10.23  40.0 SSMI16  23.6 -116.6   23.6 -116.6   24.1 -115.8 Analysis Plot     
     20130718 101100 -930.0      N/A   N/A  322.19    4.58  40.0 SSMI17  23.8 -116.4   23.8 -116.4   24.3 -115.7 Analysis Plot     
     20130718 115800 -930.0      N/A   N/A  322.19    1.07  40.0 SSMI18  24.2 -116.3   24.2 -116.3   24.7 -116.0 Analysis Plot     
     20130718 180229 -930.0      N/A   N/A  322.19    1.19  35.0   TRMM  24.4 -116.7   24.4 -116.7   25.0 -116.6 Analysis Plot     
     20130718 212800 -930.0      N/A   N/A  322.19     .56  35.0 SSMI16  25.1 -116.5   25.1 -116.5   24.6 -116.5 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.