Tropical Depression 12W

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              
     20170728 074700   -3.2      N/A   8.2% 222.20    3.21  30.0 SSMI16  19.2 -116.3   19.2 -116.3   19.0 -116.6 Analysis Plot     
     20170728 103900   -5.6      N/A  11.9% 255.53    5.64  30.0 SSMI18  19.1 -116.1   19.1 -116.1   18.9 -116.3 Analysis Plot     
     20170728 162214   -5.0      N/A  12.3% 277.75    4.96  30.0    GMI  18.5 -115.9   18.5 -115.9   18.5 -116.1 Analysis Plot     
     20170728 211400   -6.7      N/A  24.7% 288.86    6.69  30.0 SSMI16  18.0 -116.2   18.0 -116.2   18.1 -116.3 Analysis Plot     
     20170728 231400   -3.0      N/A   9.6% 155.54    2.97  30.0 SSMI18  18.0 -116.4   18.0 -116.4   18.4 -116.2 Analysis Plot     
     20170729 054028   -4.3      N/A   8.2% 133.32    4.30  30.0    GMI  18.6 -117.0   18.6 -117.0   18.7 -117.1 Analysis Plot     
     20170729 102700   -3.2      N/A   N/A   66.66    3.21  40.0 SSMI18  19.0 -117.4   19.0 -117.4   18.7 -117.6 Analysis Plot     
     20170729 201700   -0.8      N/A  15.1% 155.54     .76  35.0 SSMI16  19.9 -118.3   19.9 -118.3   19.7 -118.9 Analysis Plot     
     20170730 044914   -0.9      N/A  60.3%  88.88     .86  35.0    GMI  21.2 -119.9   21.2 -119.9   21.0 -119.9 Analysis Plot     
     20170730 084842   -1.1      N/A   N/A   66.66    1.13  35.0 SSMI15  21.8 -120.2   21.8 -120.2   22.4 -119.8 Analysis Plot     
     20170730 100600   -3.1      N/A  68.5%  99.99    3.15  35.0 SSMI17  22.5 -120.1   22.5 -120.1   22.3 -119.9 Analysis Plot     
     20170730 101500   -0.0      N/A   N/A     N/A    0.00  35.0 SSMI18  22.9 -120.1   22.9 -120.1   22.7 -120.1 Analysis Plot     
     20170730 200540 -930.0      N/A   N/A     N/A    0.00  35.0 SSMI15  24.5 -119.9   24.5 -119.9   25.1 -119.9 Analysis Plot     
     20170730 223600 -930.0      N/A   N/A     N/A    0.00  35.0 SSMI17  25.2 -119.5   25.2 -119.5   26.1 -119.0 Analysis Plot     
     20170730 224600 -930.0      N/A   N/A     N/A    0.00  35.0 SSMI18  25.2 -119.4   25.2 -119.4   26.3 -118.6 Analysis Plot     
     20170731 075709 -930.0      N/A   N/A     N/A    0.00  30.0 SSMI15  26.7 -118.4   26.7 -118.4   26.7 -117.3 Analysis Plot     
     20170731 100400   -0.9      N/A   N/A   88.88     .91  30.0 SSMI18  27.3 -118.0   27.3 -118.0   26.7 -117.7 Analysis Plot     
     20170731 151831   -0.0      N/A   N/A     N/A    0.00  30.0    GMI  28.4 -117.2   28.4 -117.2   27.6 -116.5 Analysis Plot     
     20170731 221600 -930.0      N/A   N/A     N/A    0.00  30.0 SSMI16  29.2 -116.4   29.2 -116.4   29.2 -116.5 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.