Tropical Storm 20W

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              
     20160923 040016   -4.6      N/A  21.9% 122.21    4.59  30.0  AMSR2  15.7 -139.0   15.7 -139.0   16.4 -138.7 Analysis Plot     
     20160923 065040 -930.0      N/A   N/A     N/A    0.00  30.0 SSMI15  15.8 -138.9   15.8 -138.9   15.9 -137.9 Analysis Plot     
     20160923 161327 -930.0      N/A   N/A     N/A    0.00  35.0  AMSR2  17.9 -135.9   17.9 -135.9   18.3 -136.3 Analysis Plot     
     20160923 180858 -930.0      N/A   N/A     N/A    0.00  35.0 SSMI15  18.0 -135.7   18.0 -135.7   18.2 -135.6 Analysis Plot     
     20160923 215949  -11.1      N/A   N/A   22.22   11.11  35.0    GMI  17.4 -136.3   17.4 -136.8   17.4 -136.8 Analysis Plot     
     20160924 044439 -930.0      N/A   N/A     N/A    0.00  45.0  AMSR2  17.6 -135.5   18.2 -135.6   18.2 -135.6 Analysis Plot     
     20160924 092446 -930.0      N/A   N/A     N/A    0.00  60.0    GMI  18.5 -134.6   18.6 -134.4   18.6 -134.4 Analysis Plot     
     20160924 093200 -930.0      N/A   N/A     N/A    0.00  60.0 SSMI17  18.6 -134.4   18.2 -135.1   18.2 -135.1 Analysis Plot     
     20160924 165523   39.4  >65 kts 100.0%  22.22   24.37  65.0  AMSR2  19.0 -132.8   18.5 -133.1   18.5 -133.1 Analysis Plot     
     20160924 204600    9.0      N/A  69.9%  22.22    8.95  75.0 SSMI16  18.8 -132.6   19.1 -132.5   19.1 -132.5 Analysis Plot     
     20160924 224214 -930.0      N/A   N/A     N/A    0.00  75.0    GMI  19.0 -131.8   19.0 -131.8   20.1 -131.6 Analysis Plot     
     20160924 225300 -930.0      N/A   N/A     N/A    0.00  75.0 SSMI18  19.0 -131.8   19.0 -131.8   19.9 -131.7 Analysis Plot     
     20160925 075134 -930.0      N/A   N/A     N/A    0.00  90.0 SSMI15  19.6 -130.5   19.6 -130.5   20.1 -130.2 Analysis Plot     
     20160925 091900   15.1      N/A  83.6%  33.33   15.05  95.0 SSMI17  20.1 -129.5   20.0 -129.8   20.0 -129.8 Analysis Plot     
     20160925 100500   13.6      N/A  80.8%  77.77   13.61  95.0 SSMI18  20.1 -129.3   19.9 -129.6   19.9 -129.6 Analysis Plot     
     20160925 191747    7.4      N/A  33.3% 111.10    7.39  90.0 SSMI15  20.7 -128.1   21.0 -128.3   21.0 -128.3 Analysis Plot     
     20160925 215100   35.6  >65 kts 100.0%  66.66   20.64  90.0 SSMI17  20.9 -127.5   20.7 -127.6   20.7 -127.6 Analysis Plot     
     20160926 073523   11.8      N/A   N/A   44.44   11.80  90.0 SSMI15  21.2 -126.5   21.4 -126.2   21.4 -126.2 Analysis Plot     
     20160926 091355   59.4  >65 kts 100.0% 144.43   44.37  95.0    GMI  21.6 -125.7   21.5 -125.7   21.5 -125.7 Analysis Plot     
     20160926 095400   44.9  >65 kts 100.0% 144.43   29.93  95.0 SSMI18  21.7 -125.4   21.6 -125.7   21.6 -125.7 Analysis Plot     
     20160926 190014   26.8  >65 kts  74.0% 111.10   26.84 100.0 SSMI15  22.4 -124.2   22.4 -124.1   22.4 -124.1 Analysis Plot     
     20160926 223324   25.8  >65 kts  58.9% 111.10   25.77 100.0    GMI  22.8 -123.4   23.0 -123.6   23.0 -123.6 Analysis Plot     
     20160927 051620   64.6  >85 kts 100.0%  77.77   49.61 100.0  AMSR2  23.4 -122.3   23.9 -121.9   23.9 -121.9 Analysis Plot     
     20160927 082900   23.3  >65 kts 100.0%  22.22    8.31 115.0 SSMI16  24.4 -121.0   23.7 -120.5   23.7 -120.5 Analysis Plot     
     20160927 103600 -930.0      N/A   N/A     N/A    0.00 115.0 SSMI17  24.5 -120.4   25.3 -120.7   25.3 -120.7 Analysis Plot     
     20160927 230500    9.1      N/A   6.8%  22.22    9.13  65.0 SSMI17  25.1 -118.0   25.1 -117.9   25.1 -117.9 Analysis Plot     
     20160927 235500 -930.0      N/A   N/A     N/A    0.00  65.0 SSMI18  25.2 -117.8   25.2 -117.8   24.9 -118.6 Analysis Plot     
     20160928 081600    3.1      N/A   N/A  111.10    3.09  65.0 SSMI16  25.2 -116.7   25.2 -116.7   24.5 -117.5 Analysis Plot     
     20160928 084850 -930.0      N/A   N/A     N/A    0.00  65.0 SSMI15  25.2 -116.7   25.2 -116.7   25.1 -115.6 Analysis Plot     
     20160928 090237    1.3      N/A   N/A   99.99    1.33  65.0    GMI  25.2 -116.3   25.2 -116.3   25.0 -117.4 Analysis Plot     
     20160928 111100   -0.0      N/A   N/A     N/A    0.00  65.0 SSMI18  25.2 -116.1   25.2 -116.1   25.4 -117.1 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.