Tropical Storm 21W

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              
     20150921 211100             N/A   N/A     N/A    0.00  25.0 SSMI19  15.7 -141.1   15.7 -141.1   15.5 -141.6 Analysis Plot     
     20150921 214100   -4.0      N/A   1.4% 111.10    4.02  25.0 SSMI18  15.7 -141.1   15.7 -141.1   16.2 -141.8 Analysis Plot     
     20150922 082000   -1.6      N/A   N/A   22.22    1.62  25.0 SSMI17  17.5 -140.7   17.5 -140.7   16.5 -139.9 Analysis Plot     
     20150923 035139   -0.4      N/A   N/A   44.44     .40  40.0  AMSR2  17.7 -136.1   17.7 -136.1   18.3 -135.9 Analysis Plot     
     20150923 095003   -0.4      N/A   N/A     N/A    0.00  40.0    GMI  18.5 -135.2   18.5 -135.2   17.8 -135.7 Analysis Plot     
     20150923 095200   -0.4      N/A   N/A     N/A    0.00  40.0 SSMI19  18.6 -135.1   18.6 -135.1   18.0 -135.2 Analysis Plot     
     20150923 222600   -0.4      N/A   N/A     N/A    0.00  45.0 SSMI19  18.6 -133.3   18.6 -133.3   19.2 -132.9 Analysis Plot     
     20150923 225600   -4.0      N/A   5.5% 166.65    4.05  45.0 SSMI18  18.6 -133.3   18.6 -133.3   18.8 -132.9 Analysis Plot     
     20150924 093800   38.2  >65 kts  56.2% 122.21   38.25  55.0 SSMI19  18.6 -132.2   18.5 -132.8   18.5 -132.8 Analysis Plot     
     20150924 101000   39.6  >65 kts 100.0% 133.32   24.59  55.0 SSMI18  18.6 -132.2   18.6 -132.2   18.5 -132.8 Analysis Plot     
     20150924 164532   11.2      N/A  21.9% 222.20   11.18  55.0  AMSR2  18.6 -131.9   19.0 -132.3   19.0 -132.3 Analysis Plot     
     20150924 221100    6.0      N/A  60.3% 199.98    5.99  55.0 SSMI19  19.0 -131.9   19.0 -132.1   19.0 -132.1 Analysis Plot     
     20150924 224400   17.3      N/A  69.9% 177.76   17.34  55.0 SSMI18  19.1 -131.9   19.1 -132.2   19.1 -132.2 Analysis Plot     
     20150925 092300   19.3      N/A  67.1% 111.10   19.27  75.0 SSMI17  19.5 -131.6   19.3 -131.5   19.3 -131.5 Analysis Plot     
     20150925 092500   19.5      N/A  68.5% 111.10   19.53  75.0 SSMI19  19.6 -131.5   19.4 -131.5   19.4 -131.5 Analysis Plot     
     20150925 172856   19.5      N/A   N/A     N/A    0.00  80.0  AMSR2  20.4 -130.8   20.4 -130.8   20.3 -131.1 Analysis Plot     
     20150925 215800   43.9  >65 kts 100.0% 122.21   28.92  80.0 SSMI19  20.6 -130.6   20.8 -130.5   20.8 -130.5 Analysis Plot     
     20150925 223100   42.7  >65 kts 100.0% 111.10   27.67  80.0 SSMI18  20.7 -130.5   20.8 -130.5   20.8 -130.5 Analysis Plot     
     20150926 042249   58.2  >65 kts 100.0%  99.99   43.22  90.0  AMSR2  21.2 -129.8   21.4 -129.8   21.4 -129.8 Analysis Plot     
     20150926 091100   69.7  >85 kts 100.0%  99.99   54.68  90.0 SSMI17  21.6 -129.4   21.6 -129.3   21.6 -129.3 Analysis Plot     
     20150926 091300   69.9  >85 kts 100.0%  99.99   54.92  90.0 SSMI19  21.7 -129.3   21.7 -129.3   21.7 -129.3 Analysis Plot     
     20150926 214500   69.9      N/A   N/A     N/A    0.00 105.0 SSMI19  22.2 -127.6   22.1 -127.8   22.1 -127.8 Analysis Plot     
     20150927 085900   69.9      N/A   N/A     N/A    0.00 125.0 SSMI17  22.7 -126.3   22.7 -126.3   22.5 -126.4 Analysis Plot     
     20150927 111700   69.9      N/A   N/A     N/A    0.00 125.0 SSMI18  22.8 -126.0   22.5 -125.9   22.5 -125.9 Analysis Plot     
     20150927 234700   68.0  >85 kts 100.0%  88.88   53.04 125.0 SSMI18  23.4 -123.7   23.3 -123.9   23.3 -123.9 Analysis Plot     
     20150928 102800   35.6  >65 kts 100.0%  99.99   20.58 120.0 SSMI19  24.2 -122.2   24.0 -121.7   24.0 -121.7 Analysis Plot     
     20150928 175749   35.6      N/A   N/A     N/A    0.00  90.0  AMSR2  24.4 -120.0   24.4 -120.0   25.2 -119.1 Analysis Plot     
     20150928 225700    9.6      N/A  30.1% 166.65    9.62  90.0 SSMI19  24.8 -119.2   25.2 -119.2   25.2 -119.2 Analysis Plot     
     20150928 233400    4.2      N/A  15.1% 166.65    4.21  90.0 SSMI18  24.8 -119.1   25.5 -118.8   25.5 -118.8 Analysis Plot     
     20150929 045529    4.7      N/A  15.1%  11.11    4.72  75.0  AMSR2  25.4 -118.3   25.3 -117.8   25.3 -117.8 Analysis Plot     
     20150929 064943   -0.0      N/A   N/A     N/A    0.00  75.0 SSMI15  25.6 -118.0   25.6 -118.0   25.6 -117.3 Analysis Plot     
     20150929 101300    2.7      N/A   N/A  111.10    2.72  75.0 SSMI17  26.0 -117.5   26.0 -117.5   26.4 -117.6 Analysis Plot     
     20150929 101400    1.6      N/A   N/A   11.11    1.55  75.0 SSMI19  26.2 -117.3   26.2 -117.3   26.8 -117.4 Analysis Plot     
     20150929 105300    1.3      N/A   N/A   99.99    1.30  75.0 SSMI18  26.3 -117.2   26.3 -117.2   27.0 -117.3 Analysis Plot     
     20150929 200244    1.1      N/A   N/A   44.44    1.15  75.0 SSMI15  27.3 -116.6   27.3 -116.6   27.7 -115.7 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.