Tropical Depression 13W

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              
     20160819 214900   -1.3      N/A  20.5% 144.43    1.30  35.0 SSMI18  32.5 -148.1   32.5 -148.1   32.8 -148.9 Analysis Plot     
     20160820 082200   -2.5      N/A   6.8%  99.99    2.51  35.0 SSMI16  34.7 -145.4   34.7 -145.4   35.5 -144.6 Analysis Plot     
     20160820 091100   -1.0      N/A   6.8% 111.10     .97  35.0 SSMI18  36.0 -144.8   36.0 -144.8   36.3 -143.8 Analysis Plot     
     20160820 174004   -1.0      N/A   2.7% 188.87    1.01  35.0    GMI  38.1 -143.1   38.1 -143.1   37.9 -142.6 Analysis Plot     
     20160820 213500 -930.0      N/A   N/A     N/A    0.00  30.0 SSMI18  39.0 -142.3   39.0 -142.3   39.3 -141.4 Analysis Plot     
     20160821 080900 -930.0      N/A   N/A     N/A    0.00  30.0 SSMI16  41.1 -143.1   41.1 -143.1   40.8 -142.9 Analysis Plot     
     20160821 084257   -1.3      N/A   N/A  155.54    1.26  30.0    GMI  41.9 -143.2   41.9 -143.2   41.5 -143.0 Analysis Plot     
     20160821 090000   -0.0      N/A   N/A     N/A    0.00  30.0 SSMI18  42.1 -143.3   42.1 -143.3   42.0 -143.5 Analysis Plot     
     20160821 164642 -930.0      N/A   N/A     N/A    0.00  30.0    GMI  44.5 -144.1   44.5 -144.1   44.7 -144.2 Analysis Plot     
     20160821 170252 -930.0      N/A   N/A     N/A    0.00  30.0  AMSR2  44.8 -144.2   44.8 -144.2   45.0 -145.2 Analysis Plot     
     20160821 180207   -2.0      N/A   N/A   99.99    1.97  30.0 SSMI15  44.9 -144.3   44.9 -144.3   45.4 -145.5 Analysis Plot     
     20160821 194300   -1.1      N/A   N/A   22.22    1.11  30.0 SSMI16  44.9 -144.3   44.9 -144.3   45.7 -144.6 Analysis Plot     
     20160821 210400   -1.1      N/A   N/A   22.22    1.11  30.0 SSMI17  46.0 -144.9   46.0 -144.9   46.2 -145.2 Analysis Plot     
     20160821 212100   -0.4      N/A   N/A   22.22     .42  30.0 SSMI18  46.2 -145.0   46.2 -145.0   46.2 -145.3 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.