Tropical Depression 09W

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              
     20170721 151437 -930.0      N/A   N/A     N/A    0.00  35.0 SSMI15  28.4 -175.6   28.4 -175.6   29.3 -176.0 Analysis Plot     
     20170721 174200 -930.0      N/A   N/A     N/A    0.00  35.0 SSMI16  28.6 -175.5   28.6 -175.5   29.1 -174.0 Analysis Plot     
     20170721 193200   -0.1      N/A  24.7% 144.43     .13  35.0 SSMI18  30.6 -174.3   30.6 -174.3   30.3 -174.4 Analysis Plot     
     20170722 040700   -4.6      N/A  28.8% 111.10    4.56  40.0 SSMI16  30.8 -171.6   30.8 -171.6   30.1 -170.9 Analysis Plot     
     20170722 065200   -8.9      N/A  37.0% 144.43    8.87  40.0 SSMI18  30.9 -170.3   30.9 -170.3   29.7 -170.1 Analysis Plot     
     20170722 191700   -4.5      N/A  11.0% 133.32    4.50  40.0 SSMI17  30.5 -168.2   30.5 -168.2   30.6 -168.0 Analysis Plot     
     20170722 192000   -4.4      N/A  12.3% 144.43    4.38  40.0 SSMI18  30.5 -168.2   30.5 -168.2   30.6 -168.0 Analysis Plot     
     20170723 044140 -930.0      N/A   N/A     N/A    0.00  35.0    GMI  30.9 -166.5   30.9 -166.5   30.8 -166.6 Analysis Plot     
     20170723 050321   -0.0      N/A   N/A     N/A    0.00  35.0 SSMI15  30.8 -166.8   30.8 -166.8   30.8 -166.7 Analysis Plot     
     20170723 142505  -10.0      N/A  12.3%  22.22   10.03  40.0    GMI  31.6 -164.7   31.6 -164.7   31.4 -164.6 Analysis Plot     
     20170723 155942   -4.6      N/A   N/A  111.10    4.59  40.0 SSMI15  31.7 -164.3   31.7 -164.3   31.8 -163.8 Analysis Plot     
     20170723 185200   -4.1      N/A  50.7%  22.22    4.12  40.0 SSMI16  31.8 -164.1   31.8 -164.1   31.6 -164.2 Analysis Plot     
     20170724 044832   -5.1      N/A  11.0%  22.22    5.13  45.0 SSMI15  32.2 -162.4   32.2 -162.4   32.4 -162.4 Analysis Plot     
     20170724 052500   -7.1      N/A  24.7%  22.22    7.15  45.0 SSMI16  32.3 -162.1   32.3 -162.1   32.4 -161.8 Analysis Plot     
     20170724 183900   -1.1      N/A   1.4%  55.55    1.06  45.0 SSMI16  33.2 -158.6   33.2 -158.6   33.2 -158.3 Analysis Plot     
     20170724 203500   -4.6      N/A   6.8%  66.66    4.56  35.0 SSMI18  33.1 -157.3   33.1 -157.3   33.2 -157.2 Analysis Plot     
     20170725 043110  -13.1      N/A   8.2% 155.54   13.09  35.0    GMI  32.9 -155.4   32.9 -155.4   32.7 -155.0 Analysis Plot     
     20170725 075200  -10.6      N/A   N/A  233.31   10.65  35.0 SSMI17  32.7 -154.5   32.7 -154.5   32.6 -154.5 Analysis Plot     
     20170725 075600  -11.3      N/A   N/A  233.31   11.26  35.0 SSMI18  32.7 -154.6   32.7 -154.6   32.6 -154.4 Analysis Plot     
     20170725 141417  -12.1      N/A   N/A  277.75   12.14  30.0    GMI  32.3 -153.2   32.3 -153.2   32.3 -153.1 Analysis Plot     
     20170725 151435   -9.8      N/A   N/A  288.86    9.76  30.0  AMSR2  32.3 -153.0   32.3 -153.0   32.3 -153.0 Analysis Plot     
     20170725 202300 -930.0      N/A   N/A     N/A    0.00  30.0 SSMI18  31.7 -151.8   31.7 -151.8   32.1 -151.9 Analysis Plot     
     20170726 074400   -3.4      N/A   N/A  199.98    3.43  25.0 SSMI18  31.2 -150.3   31.2 -150.3   30.6 -149.4 Analysis Plot     
     20170726 165440   -0.9      N/A   N/A   11.11     .94  25.0 SSMI15  30.8 -149.3   30.8 -149.3   31.2 -149.8 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.