Tropical Depression 20P

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

         Overpass     Inten           Ring    Ring          Wind           Forecast        Final        Target  
       Date    Time   Score  Meaning   Pct    Diam  BTdiff   Est   Sat    Lat    Lon    Lat    Lon    Lat    Lon              
     20130313 195200   -5.5      N/A  49.3% 155.54    5.48  35.0 SSMI17 -13.2 -147.0  -13.8 -147.7  -13.8 -147.7 Analysis Plot     
     20130313 214900   -5.2      N/A  41.1% 144.43    5.22  35.0 SSMI18 -13.4 -147.4  -14.2 -148.1  -14.2 -148.1 Analysis Plot     
     20130314 070700    N/A      N/A   N/A     N/A     N/A  35.0 SSMI16 -14.1 -149.1  -14.1 -149.1  -14.9 -149.4 Analysis Plot     
     20130314 083000  -15.0      N/A   N/A     N/A    2.42  50.0 SSMI17 -15.1 -150.1  -15.1 -150.1  -15.0 -150.2 Analysis Plot     
     20130314 102500    N/A      N/A   N/A     N/A     N/A  50.0 SSMI18 -15.3 -150.5  -15.3 -150.5  -15.3 -150.1 Analysis Plot     
     20130314 120027    N/A      N/A   N/A     N/A     N/A  50.0   TRMM -15.5 -150.9  -15.5 -150.9  -15.4 -150.8 Analysis Plot     
     20130314 201227   15.0      N/A   N/A     N/A    8.66  55.0   TRMM -15.4 -152.2  -15.4 -152.2  -15.3 -152.7 Analysis Plot     
     20130314 213700    2.2      N/A  15.1% 222.20    2.21  55.0 SSMI18 -15.6 -152.4  -15.6 -152.4  -15.8 -152.7 Analysis Plot     
     20130315 061528    0.9      N/A   8.2% 155.54     .87  55.0 SSMI15 -16.0 -153.3  -16.0 -153.3  -16.5 -153.7 Analysis Plot     
     20130315 065300   -4.6      N/A  12.3% 188.87    4.64  45.0 SSMI16 -16.1 -154.1  -16.1 -154.1  -16.3 -154.3 Analysis Plot     
     20130315 101200    N/A      N/A   N/A     N/A     N/A  45.0 SSMI18 -16.2 -154.2  -16.2 -154.2  -17.0 -153.9 Analysis Plot     
     20130315 110542   -1.5      N/A   8.2%  44.44    1.54  45.0   TRMM -16.3 -154.3  -16.3 -154.3  -16.9 -154.1 Analysis Plot     
     20130315 191719  -15.0      N/A   N/A     N/A    3.55  40.0   TRMM -17.1 -154.3  -17.1 -154.3  -16.9 -155.1 Analysis Plot     
     20130315 192800  -15.0      N/A   N/A     N/A     .08  40.0 SSMI17 -17.2 -154.3  -17.2 -154.3  -17.6 -153.7 Analysis Plot     
     20130315 212500    N/A      N/A   N/A     N/A     N/A  40.0 SSMI18 -17.3 -154.3  -17.3 -154.3  -17.8 -154.0 Analysis Plot     
     20130316 080300   -2.4      N/A  64.4%  44.44    2.37  35.0 SSMI17 -17.4 -153.8  -17.4 -153.8  -17.8 -153.5 Analysis Plot     
     20130316 100000    N/A      N/A   N/A     N/A     N/A  35.0 SSMI18 -17.4 -153.8  -17.4 -153.8  -18.0 -153.3 Analysis Plot     
     20130316 191500    N/A      N/A   N/A     N/A     N/A  35.0 SSMI17 -18.1 -152.9  -18.1 -152.9  -19.2 -153.2 Analysis Plot     
     20130316 193500  -15.0      N/A   N/A     N/A     .62  35.0 SSMI16 -18.1 -152.9  -18.1 -152.9  -18.6 -152.9 Analysis Plot     
     20130316 211400    N/A      N/A   N/A     N/A     N/A  35.0 SSMI18 -18.1 -152.8  -18.1 -152.8  -18.9 -153.3 Analysis Plot     
     20130317 074900    N/A      N/A   N/A     N/A     N/A  35.0 SSMI17 -19.2 -152.8  -19.2 -152.8  -18.8 -152.9 Analysis Plot     
     20130317 094700   -2.4      N/A   N/A  199.98    2.39  35.0 SSMI18 -19.3 -152.7  -19.3 -152.7  -18.9 -152.9 Analysis Plot     
     20130317 105258   -2.4      N/A   N/A  255.53    2.36  35.0   TRMM -19.4 -152.7  -19.4 -152.7  -18.9 -152.9 Analysis Plot     
     20130317 192100    N/A      N/A   N/A     N/A     N/A  30.0 SSMI16 -19.5 -152.1  -19.5 -152.1  -19.4 -152.0 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 <50 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; -909 is a failure to process (bad input data).