Tropical Depression 12W

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              
     20150723 081500   -2.7      N/A  12.3%  55.55    2.66  25.0 SSMI16  17.6 -123.1   17.6 -123.1   17.5 -122.9 Analysis Plot     
     20150723 100000   -0.2      N/A   8.2%  77.77     .18  25.0 SSMI17  17.7 -123.1   17.7 -123.1   17.8 -123.2 Analysis Plot     
     20150723 112300   -2.5      N/A  20.5% 133.32    2.47  25.0 SSMI18  17.8 -123.1   17.8 -123.1   17.8 -123.3 Analysis Plot     
     20150723 190141   -4.9      N/A  20.5% 144.43    4.94  25.0 SSMI15  18.0 -123.2   18.0 -123.2   18.1 -123.3 Analysis Plot     
     20150723 205000   -4.9      N/A   N/A     N/A    0.00  25.0 SSMI16  18.1 -123.3   18.1 -123.3   18.2 -123.3 Analysis Plot     
     20150723 224400   -2.2      N/A  12.3%  66.66    2.22  25.0 SSMI19  18.2 -123.3   18.2 -123.3   17.3 -122.9 Analysis Plot     
     20150723 235800   -2.2      N/A   N/A     N/A    0.00  25.0 SSMI18  18.2 -123.4   18.2 -123.4   18.7 -123.1 Analysis Plot     
     20150724 080100   -2.7      N/A  13.7% 144.43    2.68  40.0 SSMI16  17.9 -124.0   17.9 -124.0   17.9 -123.9 Analysis Plot     
     20150724 111000   -3.3      N/A  26.0%  33.33    3.33  40.0 SSMI18  17.9 -124.2   17.9 -124.2   17.6 -124.5 Analysis Plot     
     20150724 190045   -3.0      N/A   4.1% 144.43    2.97  40.0 SSMI15  17.7 -124.9   17.7 -124.9   17.5 -125.1 Analysis Plot     
     20150724 222100   -4.9      N/A  17.8%  99.99    4.94  35.0 SSMI17  18.3 -125.1   18.3 -125.1   18.4 -125.6 Analysis Plot     
     20150724 223100   -4.9      N/A  19.2%  88.88    4.88  35.0 SSMI19  18.3 -125.1   18.3 -125.1   18.4 -125.7 Analysis Plot     
     20150724 234500   -4.9      N/A   N/A     N/A    0.00  35.0 SSMI18  18.4 -125.2   18.4 -125.2   18.3 -126.1 Analysis Plot     
     20150725 093400  -31.5      N/A 100.0%  22.22   16.47  25.0 SSMI17  19.0 -126.1   19.0 -126.1   20.0 -126.3 Analysis Plot     
     20150725 105800   -0.0      N/A   N/A     N/A    0.00  25.0 SSMI18  19.1 -126.1   19.1 -126.1   19.8 -126.2 Analysis Plot     
     20150725 171712   -0.0      N/A   N/A     N/A    0.00  25.0  AMSR2  19.7 -126.2   19.7 -126.2   20.2 -126.0 Analysis Plot     
     20150725 221700   -0.0      N/A   N/A     N/A    0.00  25.0 SSMI19  20.1 -126.2   20.1 -126.2   19.7 -125.0 Analysis Plot     
     20150725 233200   -3.2      N/A  12.3%  99.99    3.25  25.0 SSMI18  20.2 -126.1   20.2 -126.1   21.0 -126.1 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.