Tropical Depression 09L

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              
     20150916 220100   -0.5      N/A  11.0% 222.20     .46  25.0 SSMI18  15.2   44.6   15.2   44.6   14.9   44.5 Analysis Plot     
     20150917 060503   -0.5      N/A   N/A     N/A    0.00  25.0 SSMI15  16.1   45.2   16.1   45.2   15.7   44.7 Analysis Plot     
     20150917 101100   -1.5      N/A   N/A   22.22    1.51  30.0 SSMI19  16.4   45.4   16.4   45.4   16.1   45.3 Analysis Plot     
     20150917 103600   -0.7      N/A   N/A   33.33     .69  30.0 SSMI18  16.5   45.4   16.5   45.4   16.2   45.2 Analysis Plot     
     20150917 160027   -3.9      N/A   N/A   11.11    3.87  30.0  AMSR2  16.1   45.2   16.1   45.2   16.1   45.0 Analysis Plot     
     20150917 212300   -5.3      N/A   N/A   33.33    5.25  25.0 SSMI19  16.5   44.8   16.5   44.8   16.7   44.8 Analysis Plot     
     20150917 214900   -5.5      N/A   N/A   44.44    5.51  25.0 SSMI18  16.5   44.8   16.5   44.8   16.7   44.8 Analysis Plot     
     20150918 041334   -5.5      N/A   N/A     N/A    0.00  25.0  AMSR2  17.5   45.4   17.5   45.4   16.9   45.3 Analysis Plot     
     20150918 095800   -4.6      N/A   N/A  166.65    4.58  25.0 SSMI19  17.7   45.8   17.7   45.8   17.8   45.8 Analysis Plot     
     20150918 102400   -3.7      N/A   N/A  177.76    3.65  25.0 SSMI18  17.8   45.9   17.8   45.9   17.8   45.8 Analysis Plot     
     20150918 164323   -0.0      N/A   N/A     N/A    0.00  25.0  AMSR2  17.8   47.3   17.8   47.3   17.8   47.3 Analysis Plot     
     20150918 211000   -2.6      N/A  16.4% 122.21    2.58  25.0 SSMI19  18.0   47.2   18.0   47.2   17.9   47.2 Analysis Plot     
     20150919 045453   -7.8      N/A   5.5% 222.20    7.83  25.0  AMSR2  18.5   48.6   18.5   48.6   18.5   48.3 Analysis Plot     
     20150919 064515   -2.7      N/A   1.4%  77.77    2.69  25.0 SSMI15  18.4   49.2   18.4   49.2   18.2   49.1 Analysis Plot     
     20150919 094400   -2.4      N/A   N/A   22.22    2.39  25.0 SSMI19  18.5   49.5   18.5   49.5   18.6   49.5 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.