Tropical Depression 09W

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              
     20130731 042301   -5.7      N/A   8.5% 233.31    5.71  30.0   TRMM  15.1 -115.9   15.1 -115.9   14.7 -116.3 Analysis Plot     
     20130731 093000   -5.8      N/A   9.6%  55.55    5.83  30.0 SSMI16  15.3 -115.3   15.3 -115.3   15.1 -115.4 Analysis Plot     
     20130731 124000   -3.4      N/A  22.2% 233.31    3.37  30.0 SSMI18  15.4 -115.1   15.4 -115.1   15.6 -115.0 Analysis Plot     
     20130731 220500   -4.8      N/A   N/A  222.20    4.80  35.0 SSMI16  15.4 -114.2   15.4 -114.2   15.5 -114.6 Analysis Plot     
     20130801 032653   -2.9      N/A   N/A   22.22    2.91  35.0   TRMM  15.7 -113.7   15.7 -113.7   16.0 -114.3 Analysis Plot     
     20130801 091700 -930.0      N/A   N/A  255.53    1.86  35.0 SSMI16  16.5 -113.4   16.5 -113.4   17.0 -114.0 Analysis Plot     
     20130801 103100 -930.0      N/A   N/A  255.53    4.22  35.0 SSMI17  16.6 -113.3   16.6 -113.3   17.1 -113.6 Analysis Plot     
     20130801 122700   -2.4      N/A  31.5% 122.21    2.36  35.0 SSMI18  16.8 -113.2   16.8 -113.2   16.8 -113.3 Analysis Plot     
     20130801 215200   -3.7      N/A  24.7% 211.09    3.68  45.0 SSMI16  17.4 -112.8   17.4 -112.8   17.8 -112.6 Analysis Plot     
     20130801 230600 -930.0      N/A   N/A  322.19    6.90  45.0 SSMI17  17.5 -112.6   17.5 -112.6   18.0 -112.4 Analysis Plot     
     20130802 010200 -930.0      N/A   N/A  311.08    8.45  45.0 SSMI18  18.0 -112.6   18.0 -112.6   18.3 -112.0 Analysis Plot     
     20130802 040849  -16.3      N/A  47.9%  66.66   16.30  45.0   TRMM  18.3 -112.2   18.3 -112.2   18.5 -112.1 Analysis Plot     
     20130802 093636    5.5      N/A  23.3%  88.88    5.49  60.0 SSMI15  18.9 -111.5   18.9 -111.5   19.2 -111.3 Analysis Plot     
     20130802 101800    4.3      N/A  52.1%  33.33    4.28  60.0 SSMI17  19.3 -111.1   19.3 -111.1   19.3 -111.2 Analysis Plot     
     20130802 121919 -930.0      N/A   N/A   88.88   21.21  50.0   TRMM  19.8 -110.5   19.3 -110.3   19.3 -110.3 Analysis Plot     
     20130802 205411   -1.1      N/A  43.8% 155.54    1.05  50.0 SSMI15  20.7 -108.8   20.7 -108.8   20.9 -108.9 Analysis Plot     
     20130802 225100   -7.4      N/A  54.8%  33.33    7.42  50.0 SSMI17  21.0 -108.1   21.0 -108.1   20.9 -108.3 Analysis Plot     
     20130803 004900  -26.2      N/A  87.7%  44.44   11.22  50.0 SSMI18  21.2 -108.0   21.2 -108.0   21.3 -107.9 Analysis Plot     
     20130803 100700   -2.9      N/A   N/A   33.33    2.85  45.0 SSMI17  22.1 -105.6   22.1 -105.6   22.3 -105.6 Analysis Plot     
     20130803 112250   -0.3      N/A   N/A   44.44     .26  45.0   TRMM  22.2 -105.2   22.2 -105.2   22.4 -105.2 Analysis Plot     
     20130803 230600 -930.0      N/A   N/A  133.32    5.39  45.0 SSMI16  23.1 -102.3   23.1 -102.3   23.6 -101.1 Analysis Plot     
     20130804 035339   -0.9      N/A   N/A   22.22     .89  45.0   TRMM  23.4 -101.5   23.4 -101.5   23.3 -100.2 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.