Tropical Depression 07L

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              
     20170807 090538   -0.0      N/A   N/A     N/A    0.00  40.0 SSMI15  17.1   84.2   17.1   84.2   17.1   83.8 Analysis Plot     
     20170807 123800   -1.3      N/A  60.3%  22.22    1.33  45.0 SSMI18  17.5   84.8   17.5   84.5   17.5   84.5 Analysis Plot     
     20170807 163042 -930.0      N/A   N/A     N/A    0.00  45.0    GMI  17.8   85.4   17.8   85.4   18.4   85.7 Analysis Plot     
     20170807 212545  -22.6      N/A  38.4% 144.43   22.63  50.0 SSMI15  18.2   85.5   18.2   85.5   18.7   85.7 Analysis Plot     
     20170807 233500   -1.7      N/A   N/A   88.88    1.66  50.0 SSMI17  18.8   86.2   18.8   86.2   19.0   86.4 Analysis Plot     
     20170807 235100   -3.6      N/A   1.4%  88.88    3.59  50.0 SSMI18  18.8   86.3   18.8   86.3   18.9   86.7 Analysis Plot     
     20170807 235100   -3.9      N/A   N/A   88.88    3.85  50.0 SSMI18  18.8   86.7   18.8   86.7   18.9   86.6 Analysis Plot     
     20170808 083655 -930.0      N/A   N/A     N/A    0.00  50.0 SSMI15  19.3   88.5   19.3   88.5   19.0   88.7 Analysis Plot     
     20170808 122500   -0.0      N/A   N/A     N/A    0.00  40.0 SSMI18  19.5   89.2   19.5   89.2   19.3   89.3 Analysis Plot     
     20170808 194906 -930.0      N/A   N/A     N/A    0.00  35.0  AMSR2  20.1   90.0   20.1   90.0   20.4   90.3 Analysis Plot     
     20170808 234100 -930.0      N/A   N/A     N/A    0.00  35.0 SSMI18  20.3   90.6   20.3   90.6   19.7   90.5 Analysis Plot     
     20170808 234100 -930.0      N/A   N/A     N/A    0.00  40.0 SSMI18  20.1   90.9   20.1   90.9   19.8   90.5 Analysis Plot     
     20170809 030315   -2.5      N/A  37.0%  88.88    2.53  40.0    GMI  20.3   91.3   20.3   91.3   20.1   91.4 Analysis Plot     
     20170809 075818   -0.0      N/A   N/A     N/A    0.00  55.0  AMSR2  20.4   92.6   20.4   92.6   20.9   93.2 Analysis Plot     
     20170809 162140 -930.0      N/A   N/A     N/A    0.00  60.0    GMI  20.2   94.2   20.2   94.2   20.5   94.0 Analysis Plot     
     20170809 215900   31.9  >65 kts  90.4%  44.44   16.89  65.0 SSMI16  20.1   94.8   20.2   94.9   20.2   94.9 Analysis Plot     
     20170810 005000    4.9      N/A  75.3%  55.55    4.93  75.0 SSMI17  20.2   95.8   20.0   95.6   20.0   95.6 Analysis Plot     
     20170810 095837 -930.0      N/A   N/A     N/A    0.00  70.0 SSMI15  19.9   97.8   19.9   97.8   20.2   97.2 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.