Tropical Depression 18E

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              
     20160926 013208   -7.5      N/A  17.8% 222.20    7.46  30.0    GMI  16.6  120.1   16.6  120.1   16.4  119.7 Analysis Plot     
     20160926 021700 -930.0      N/A   N/A     N/A    0.00  30.0 SSMI17  16.6  120.1   16.6  120.1   16.3  119.9 Analysis Plot     
     20160926 021700   -2.8      N/A  16.4% 222.20    2.79  30.0 SSMI17  16.7  120.1   16.7  120.1   16.3  119.7 Analysis Plot     
     20160926 030500   -4.3      N/A   1.4% 222.20    4.34  30.0 SSMI18  16.8  120.1   16.8  120.1   16.5  120.0 Analysis Plot     
     20160926 100911 -930.0      N/A   N/A     N/A    0.00  35.0  AMSR2  16.9  119.4   16.9  119.4   16.9  119.7 Analysis Plot     
     20160926 140600   -3.7      N/A   6.8% 222.20    3.72  35.0 SSMI16  16.9  119.6   16.9  119.6   16.7  119.6 Analysis Plot     
     20160926 144842 -930.0      N/A   N/A     N/A    0.00  35.0    GMI  17.0  119.4   17.0  119.4   17.2  119.3 Analysis Plot     
     20160926 210033   -7.5      N/A   5.5% 188.87    7.55  45.0  AMSR2  16.8  118.9   16.8  118.9   16.6  118.8 Analysis Plot     
     20160927 025100 -930.0      N/A   N/A     N/A    0.00  45.0 SSMI18  17.1  118.5   17.1  118.5   16.8  118.6 Analysis Plot     
     20160927 025200   -6.7      N/A   4.1% 188.87    6.69  45.0 SSMI18  17.3  118.3   17.3  118.3   17.0  118.4 Analysis Plot     
     20160927 091242   -0.0      N/A   N/A     N/A    0.00  40.0  AMSR2  17.9  117.6   17.9  117.6   18.5  117.5 Analysis Plot     
     20160927 135704   -2.9      N/A  15.1% 111.10    2.88  40.0    GMI  18.1  117.6   18.1  117.6   18.3  117.0 Analysis Plot     
     20160927 152700 -930.0      N/A   N/A     N/A    0.00  40.0 SSMI18  18.4  117.2   18.4  117.2   19.4  117.1 Analysis Plot     
     20160928 023900   -7.0      N/A   N/A  211.09    7.05  35.0 SSMI18  19.5  115.9   19.5  115.9   19.3  115.9 Analysis Plot     
     20160928 095547 -930.0      N/A   N/A     N/A    0.00  35.0  AMSR2  20.4  115.5   20.4  115.5   21.0  115.6 Analysis Plot     
     20160928 142300   -2.7      N/A   2.7% 166.65    2.65  30.0 SSMI17  21.0  115.2   21.0  115.2   21.1  115.1 Analysis Plot     
     20160928 151300   -0.1      N/A   5.5% 144.43     .07  30.0 SSMI18  21.1  115.2   21.1  115.2   21.2  115.0 Analysis Plot     
     20160928 204910   -5.4      N/A   6.8% 222.20    5.40  30.0  AMSR2  21.5  115.2   21.5  115.2   21.6  115.2 Analysis Plot     
     20160929 002913  -10.6      N/A   9.6%  99.99   10.58  30.0    GMI  21.9  115.3   21.9  115.3   22.2  115.0 Analysis Plot     
     20160929 013800   -2.8      N/A   N/A  111.10    2.75  30.0 SSMI17  22.0  115.1   22.0  115.1   22.0  115.1 Analysis Plot     
     20160929 022700   -3.5      N/A   N/A  111.10    3.55  30.0 SSMI18  22.1  115.1   22.1  115.1   22.2  115.2 Analysis Plot     
     20160929 085927  -10.5      N/A   N/A  188.87   10.55  25.0  AMSR2  22.7  115.3   22.7  115.3   23.2  115.2 Analysis Plot     
     20160929 112311   -1.7      N/A   N/A   22.22    1.73  25.0 SSMI15  22.9  115.4   22.9  115.4   23.1  115.7 Analysis Plot     
     20160929 134853   -7.4      N/A   N/A  188.87    7.37  25.0    GMI  23.4  115.4   23.4  115.4   23.7  115.3 Analysis Plot     
     20160929 141000   -1.2      N/A   N/A   33.33    1.19  25.0 SSMI17  23.5  115.5   23.5  115.5   24.1  115.5 Analysis Plot     
     20160929 150000   -3.0      N/A   N/A   44.44    2.95  25.0 SSMI18  23.5  115.5   23.5  115.5   24.1  115.6 Analysis Plot     
     20160929 231000  -16.1      N/A   N/A  222.20   16.13  25.0 SSMI16  24.0  116.0   24.0  116.0   24.0  115.9 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.