Tropical Depression 19W

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              
     20170904 184421   -2.3      N/A   N/A   66.66    2.34  30.0 SSMI15  16.8 -124.8   16.8 -124.8   16.5 -125.5 Analysis Plot     
     20170904 212200 -930.0      N/A   N/A     N/A    0.00  30.0 SSMI16  16.9 -124.6   16.9 -124.6   16.5 -125.3 Analysis Plot     
     20170904 220400 -930.0      N/A   N/A     N/A    0.00  30.0 SSMI18  17.1 -124.2   17.1 -124.2   17.3 -124.7 Analysis Plot     
     20170905 043106   -3.1      N/A   N/A   44.44    3.12  25.0    GMI  17.9 -124.3   17.9 -124.3   18.7 -124.3 Analysis Plot     
     20170905 052225   -0.0      N/A   N/A     N/A    0.00  25.0  AMSR2  18.0 -124.3   18.0 -124.3   18.0 -124.3 Analysis Plot     
     20170905 101700   -1.9      N/A   N/A  222.20    1.87  25.0 SSMI17  18.4 -123.8   18.4 -123.8   18.9 -123.1 Analysis Plot     
     20170905 174901   -6.7      N/A   N/A   11.11    6.67  25.0    GMI  19.1 -122.8   19.1 -122.8   19.0 -122.0 Analysis Plot     
     20170905 225100   -1.6      N/A   8.2% 244.42    1.62  30.0 SSMI17  20.7 -120.7   20.7 -120.7   20.7 -120.8 Analysis Plot     
     20170906 100500   -0.0      N/A   N/A     N/A    0.00  25.0 SSMI17  21.2 -119.8   21.2 -119.8   21.3 -120.0 Analysis Plot     
     20170906 200408   -2.9      N/A   N/A  166.65    2.94  25.0 SSMI15  22.4 -119.3   22.4 -119.3   22.7 -119.0 Analysis Plot     
     20170906 205500   -2.1      N/A   N/A  144.43    2.12  25.0 SSMI16  22.3 -119.3   22.3 -119.3   22.5 -119.2 Analysis Plot     
     20170906 223700   -2.0      N/A   N/A  133.32    2.02  25.0 SSMI17  22.9 -119.1   22.9 -119.1   22.8 -119.1 Analysis Plot     
     20170907 042014   -4.0      N/A   N/A  122.21    3.97  25.0    GMI  23.7 -118.9   23.7 -118.9   23.5 -119.1 Analysis Plot     
     20170907 051134   -5.7      N/A   N/A  155.54    5.74  25.0  AMSR2  23.7 -118.8   23.7 -118.8   23.5 -119.1 Analysis Plot     
     20170907 103600 -930.0      N/A   N/A     N/A    0.00  25.0 SSMI18  24.4 -118.8   24.4 -118.8   24.9 -118.4 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.