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              
     20150914 210300   -4.0      N/A   N/A   55.55    4.03  25.0 SSMI19  17.3 -151.7   17.3 -151.7   17.7 -151.7 Analysis Plot     
     20150914 212500   -4.0      N/A   N/A     N/A    0.00  25.0 SSMI18  17.4 -151.7   17.4 -151.7   17.1 -150.8 Analysis Plot     
     20150915 215603   -4.0      N/A   N/A     N/A    0.00  40.0    GMI  18.7 -148.8   18.7 -148.8   19.5 -148.3 Analysis Plot     
     20150916 062302   -0.0      N/A   N/A     N/A    0.00  45.0 SSMI15  19.4 -147.9   19.6 -147.6   19.6 -147.6 Analysis Plot     
     20150916 075900   37.8  >65 kts 100.0%  99.99   22.78  55.0 SSMI17  19.9 -147.1   19.9 -147.1   19.8 -147.1 Analysis Plot     
     20150916 080400   40.0  >65 kts 100.0%  99.99   25.01  55.0 SSMI19  20.1 -146.8   19.9 -147.1   19.9 -147.1 Analysis Plot     
     20150916 175809   10.4      N/A  35.6% 133.32   10.39  60.0 SSMI15  20.6 -145.5   20.5 -145.5   20.5 -145.5 Analysis Plot     
     20150916 203600   10.1      N/A  21.9%  55.55   10.14  65.0 SSMI19  20.7 -145.2   20.6 -145.3   20.6 -145.3 Analysis Plot     
     20150917 060806   38.0  >65 kts 100.0%  55.55   23.00  80.0 SSMI15  21.6 -144.4   21.6 -144.4   21.6 -144.4 Analysis Plot     
     20150917 074800   38.0      N/A   N/A     N/A    0.00  80.0 SSMI17  21.8 -144.1   21.9 -144.2   21.9 -144.2 Analysis Plot     
     20150917 095700   56.2  >65 kts 100.0%  66.66   41.16  80.0 SSMI18  22.2 -143.7   21.9 -143.7   21.9 -143.7 Analysis Plot     
     20150917 174213   23.3  >65 kts  68.5%  66.66   23.27  95.0 SSMI15  22.9 -142.9   23.0 -142.8   23.0 -142.8 Analysis Plot     
     20150917 222800   13.7      N/A  68.5%  44.44   13.73 105.0 SSMI18  23.5 -142.6   23.6 -142.6   23.6 -142.6 Analysis Plot     
     20150918 033417   22.1  >65 kts  68.5%  44.44   22.14 105.0  AMSR2  24.2 -142.4   24.4 -142.3   24.4 -142.3 Analysis Plot     
     20150918 092000   22.1      N/A   N/A     N/A    0.00 105.0 SSMI19  25.3 -142.3   25.1 -142.9   25.1 -142.9 Analysis Plot     
     20150918 094500   -0.0      N/A   N/A     N/A    0.00 105.0 SSMI18  25.3 -142.3   24.9 -142.7   24.9 -142.7 Analysis Plot     
     20150918 214800   39.9  >65 kts 100.0% 122.21   24.94  75.0 SSMI19  27.2 -143.2   27.5 -143.0   27.5 -143.0 Analysis Plot     
     20150918 221500   40.6  >65 kts 100.0% 133.32   25.64  75.0 SSMI18  27.2 -143.2   27.6 -142.9   27.6 -142.9 Analysis Plot     
     20150919 093400    4.4      N/A  42.5% 133.32    4.41  75.0 SSMI18  29.6 -144.8   29.5 -144.9   29.5 -144.9 Analysis Plot     
     20150919 162342   -0.0      N/A   N/A     N/A    0.00  60.0  AMSR2  30.8 -146.3   30.8 -146.3   31.1 -146.5 Analysis Plot     
     20150919 213300   12.3      N/A  37.0%  77.77   12.31  60.0 SSMI19  31.6 -146.9   31.6 -146.9   31.5 -147.1 Analysis Plot     
     20150919 220100   14.7      N/A  46.6%  77.77   14.67  60.0 SSMI18  31.7 -146.9   31.7 -146.9   31.6 -147.2 Analysis Plot     
     20150920 032344    3.8      N/A   5.5% 144.43    3.76  55.0  AMSR2  32.0 -147.5   32.0 -147.5   32.4 -147.9 Analysis Plot     
     20150920 092200    3.8      N/A   N/A     N/A    0.00  50.0 SSMI18  33.5 -148.9   33.5 -148.9   33.3 -149.0 Analysis Plot     
     20150920 152747   -4.8      N/A   6.8% 155.54    4.83  45.0  AMSR2  34.5 -149.9   34.5 -149.9   34.6 -150.9 Analysis Plot     
     20150920 211900   -0.4      N/A   9.6% 144.43     .43  45.0 SSMI19  35.2 -150.7   35.2 -150.7   35.5 -151.1 Analysis Plot     
     20150920 214800   -0.0      N/A   N/A     N/A    0.00  45.0 SSMI18  35.2 -150.8   35.2 -150.8   35.7 -151.1 Analysis Plot     
     20150921 023030   -4.4      N/A   3.1% 177.76    4.40  45.0  AMSR2  35.6 -151.3   35.6 -151.3   35.9 -151.6 Analysis Plot     
     20150921 065900   -4.4      N/A   N/A     N/A    0.00  45.0 SSMI17  36.1 -151.8   36.1 -151.8   36.2 -152.0 Analysis Plot     
     20150921 091100   -2.6      N/A   N/A  177.76    2.59  45.0 SSMI18  36.5 -152.2   36.5 -152.2   36.3 -152.2 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.