Tropical Depression 01L

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              
     20170419 210400   -9.0      N/A   N/A   33.33    9.01  30.0 SSMI17  32.3   40.2   32.3   40.2   32.0   40.4 Analysis Plot     
     20170419 210400   -8.0      N/A  15.1%  88.88    8.01  30.0 SSMI17  32.5   39.9   32.5   39.9   32.3   39.6 Analysis Plot     
     20170419 212900 -930.0      N/A   N/A     N/A    0.00  30.0 SSMI18  32.6   39.8   32.6   39.8   32.5   39.8 Analysis Plot     
     20170420 065533 -930.0      N/A   N/A     N/A    0.00  30.0    GMI  33.9   39.3   33.9   39.3   34.3   39.0 Analysis Plot     
     20170420 095200   -9.9      N/A   1.4% 188.87    9.94  30.0 SSMI18  34.7   39.5   34.7   39.5   35.3   39.3 Analysis Plot     
     20170420 205200   -3.1      N/A  16.4%  66.66    3.05  40.0 SSMI17  37.6   41.6   37.6   41.6   38.1   41.5 Analysis Plot     
     20170420 215533   -7.1      N/A  20.5%  66.66    7.07  40.0    GMI  37.8   42.4   37.8   42.4   38.4   42.1 Analysis Plot     
     20170421 073602 -930.0      N/A   N/A     N/A    0.00  45.0    GMI  40.0   47.3   40.3   47.8   40.3   47.8 Analysis Plot     
     20170421 080500   -9.2      N/A   N/A  122.21    9.22  45.0 SSMI16  40.0   47.1   40.0   47.1   40.5   47.5 Analysis Plot     
     20170421 094000 -930.0      N/A   N/A     N/A    0.00  45.0 SSMI18  40.0   48.5   40.0   48.5   40.1   48.5 Analysis Plot     
     20170421 223804 -930.0      N/A   N/A     N/A    0.00  45.0    GMI  37.8   51.3   37.8   51.3   38.3   51.3 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.