Tropical Depression 15W

Passive Microwave (PMW) Intensity Information
Advanced Dvorak Technique (ADT)
Version 8.1.5
 

         Overpass     Inten           Ring    Ring          Wind           Forecast        Final        Target  
       Date    Time   Score  Meaning   Pct    Diam  BTdiff   Est   Sat    Lat    Lon    Lat    Lon    Lat    Lon              
     20130901 123051   -3.9      N/A  21.9%  66.66    3.90  25.0   TRMM  25.9 -124.3   25.9 -124.3   26.0 -124.4 Analysis Plot     
     20130901 190315   -8.2      N/A  27.4%  55.55    8.16  30.0   TRMM  26.2 -124.9   26.2 -124.9   26.0 -125.3 Analysis Plot     
     20130901 212500   -3.6      N/A  21.9% 155.54    3.60  30.0 SSMI17  26.4 -125.2   26.4 -125.2   26.5 -125.3 Analysis Plot     
     20130901 234400   -1.2      N/A  27.4% 122.21    1.18  30.0 SSMI18  26.5 -125.3   26.5 -125.3   26.7 -125.4 Analysis Plot     
     20130902 084300   -5.0      N/A  23.3%  44.44    4.97  35.0 SSMI17  27.5 -126.2   27.5 -126.2   27.5 -126.5 Analysis Plot     
     20130902 113629   -0.9      N/A   1.4%  44.44     .90  35.0   TRMM  27.8 -126.5   27.8 -126.5   27.7 -126.6 Analysis Plot     
     20130902 131420 -930.0      N/A   N/A  311.08   14.34  35.0   TRMM  27.8 -126.6   27.8 -126.6   28.0 -127.0 Analysis Plot     
     20130902 180801 -930.0      N/A   N/A  233.31   10.65  40.0   TRMM  28.2 -127.3   28.2 -127.3   28.1 -126.8 Analysis Plot     
     20130902 211100   -4.3      N/A  38.4% 144.43    4.26  40.0 SSMI17  28.5 -127.5   28.5 -127.5   28.3 -127.5 Analysis Plot     
     20130902 233100   -3.2      N/A  45.2%  66.66    3.18  40.0 SSMI18  28.7 -127.7   28.7 -127.7   28.7 -127.5 Analysis Plot     
     20130903 121846   -3.3      N/A  50.7% 144.43    3.28  50.0   TRMM  30.3 -129.0   30.3 -129.0   30.5 -129.8 Analysis Plot     
     20130903 153450   -8.1      N/A  20.5%  88.88    8.13  50.0   TRMM  30.5 -129.3   30.5 -129.3   30.9 -130.1 Analysis Plot     
     20130903 205800 -930.0      N/A   N/A  322.19   13.84  45.0 SSMI17  31.3 -130.8   31.3 -130.8   31.5 -130.9 Analysis Plot     
     20130904 081800   -1.6      N/A   N/A   11.11    1.63  40.0 SSMI17  33.2 -133.8   33.2 -133.8   32.5 -134.2 Analysis Plot     
     20130904 103900  -10.3      N/A   N/A  244.42   10.32  40.0 SSMI18  33.4 -134.3   33.4 -134.3   33.3 -133.8 Analysis Plot     
     20130904 112446  -11.9      N/A   1.4% 244.42   11.91  40.0   TRMM  33.5 -134.6   33.5 -134.6   33.2 -133.7 Analysis Plot     
     20130904 130218   -2.6      N/A   N/A   99.99    2.63  40.0   TRMM  33.7 -134.9   33.7 -134.9   33.9 -134.0 Analysis Plot     
     20130904 144000   -1.7      N/A   N/A   44.44    1.65  40.0   TRMM  33.8 -135.2   33.8 -135.2   33.6 -134.1 Analysis Plot     
     20130904 204300   -3.3      N/A   N/A  144.43    3.30  40.0 SSMI17  34.5 -136.5   34.5 -136.5   34.0 -135.9 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.