Tropical Depression 20W


Passive Microwave (PMW) Intensity Information
Advanced Dvorak Technique (ADT)
Version 8.1.5
 

         Overpass     Inten           Ring    Ring          Wind           Forecast        Final        Target  
       Date    Time   Score  Meaning   Pct    Diam  BTdiff   Est   Sat    Lat    Lon    Lat    Lon    Lat    Lon              
     20130926 213900   -0.0      N/A   N/A     N/A    0.00  25.0 SSMI16  15.1 -116.8   15.1 -116.8   15.8 -116.8 Analysis Plot     
     20130926 225000 -930.0      N/A   N/A   22.22   12.31  25.0 SSMI17  15.1 -116.7   15.1 -116.7   15.8 -116.4 Analysis Plot     
     20130927 085100  -16.1      N/A  50.7%  33.33   16.10  35.0 SSMI16  17.0 -116.2   17.0 -116.2   17.0 -115.6 Analysis Plot     
     20130927 100000  -10.9      N/A  32.9%  77.77   10.86  35.0 SSMI17  17.0 -116.1   17.0 -116.1   17.1 -115.8 Analysis Plot     
     20130927 124000   -9.7      N/A  68.5%  22.22    9.68  35.0 SSMI18  17.0 -115.3   17.0 -115.3   16.8 -115.1 Analysis Plot     
     20130927 212600  -16.8      N/A 100.0%  11.11    1.77  45.0 SSMI16  16.8 -113.8   16.8 -113.8   16.3 -114.2 Analysis Plot     
     20130927 225344  -44.8      N/A 100.0%  22.22   29.76  45.0   TRMM  16.7 -113.8   16.3 -114.2   16.3 -114.2 Analysis Plot     
     20130928 070551    0.5      N/A  41.1%  11.11     .47  60.0   TRMM  16.7 -114.0   16.7 -114.0   16.8 -114.0 Analysis Plot     
     20130928 094946   -0.0      N/A   N/A     N/A    0.00  55.0 SSMI15  15.9 -113.7   15.9 -113.7   17.1 -114.1 Analysis Plot     
     20130928 122700   -0.0      N/A   N/A     N/A    0.00  60.0 SSMI18  16.5 -113.8   16.5 -113.8   16.9 -113.5 Analysis Plot     
     20130928 211207 -930.0      N/A   N/A  199.98    1.94  70.0 SSMI15  16.8 -112.9   16.9 -113.2   16.9 -113.2 Analysis Plot     
     20130928 215804   12.5      N/A  82.2%  11.11   12.50  70.0   TRMM  16.8 -112.7   16.7 -112.7   16.7 -112.7 Analysis Plot     
     20130928 222200    0.8      N/A  60.3% 144.43     .79  70.0 SSMI17  16.8 -112.7   16.6 -112.5   16.6 -112.5 Analysis Plot     
     20130929 010200   19.0      N/A 100.0%  11.11    3.98  90.0 SSMI18  16.7 -112.2   16.6 -112.4   16.6 -112.4 Analysis Plot     
     20130929 093431   50.4  >65 kts 100.0% 122.21   35.43  90.0 SSMI15  16.7 -111.5   16.7 -111.5   16.7 -111.5 Analysis Plot     
     20130929 201621   46.6  >65 kts 100.0%  77.77   31.55  80.0 SSMI15  17.1 -109.5   16.8 -109.6   16.8 -109.6 Analysis Plot     
     20130930 005000   69.1  >85 kts 100.0%  77.77   54.05  75.0 SSMI18  17.2 -108.3   17.0 -108.5   17.0 -108.5 Analysis Plot     
     20130930 065038   46.3  >65 kts 100.0%  55.55   31.32  90.0   TRMM  17.5 -107.5   17.5 -107.3   17.5 -107.3 Analysis Plot     
     20130930 095400    5.6      N/A  46.6% 155.54    5.63  90.0 SSMI16  17.6 -106.7   18.1 -106.9   18.1 -106.9 Analysis Plot     
     20130930 110400   21.0  >65 kts 100.0%  22.22    5.96  90.0 SSMI17  17.6 -106.4   17.7 -106.2   17.7 -106.2 Analysis Plot     
     20130930 214248    1.8      N/A   N/A   22.22    1.84  80.0   TRMM  18.0 -103.2   18.0 -103.2   18.4 -103.3 Analysis Plot     
     20130930 222900    2.0      N/A   N/A   33.33    2.02  80.0 SSMI16  18.0 -102.9   18.0 -102.9   18.3 -102.8 Analysis Plot     
     20130930 233700    2.9      N/A   N/A   66.66    2.95  80.0 SSMI17  18.0 -102.6   18.0 -102.6   18.3 -102.3 Analysis Plot     
     20131001 055349 -930.0      N/A   N/A  322.19    2.29  80.0   TRMM  17.9 -101.2   17.9 -101.2   17.5 -101.0 Analysis Plot     
     20131001 094400 -930.0      N/A   N/A  333.30    1.62  80.0 SSMI16  17.8 -100.3   17.8 -100.3   17.9  -99.9 Analysis Plot     
     20131001 104505    1.5      N/A   N/A  288.86    1.54  80.0 SSMI15  17.8 -100.5   17.8 -100.5   17.6 -100.3 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.