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              
     20141031 073719   -4.4      N/A   N/A   22.22    4.41  30.0 SSMI15  12.9 -136.5   12.9 -136.5   12.6 -136.4 Analysis Plot     
     20141031 091300  -14.9      N/A  84.9%  77.77   14.92  30.0 SSMI17  12.7 -136.0   12.7 -136.0   12.4 -135.8 Analysis Plot     
     20141031 101800   -9.1      N/A  39.7%  66.66    9.06  30.0 SSMI18  12.8 -135.7   12.8 -135.7   12.7 -135.8 Analysis Plot     
     20141031 182109   -1.5      N/A  31.5%  99.99    1.54  45.0 SSMI15  13.3 -134.3   13.3 -134.3   13.1 -134.8 Analysis Plot     
     20141031 193500   -4.0      N/A  56.2% 111.10    3.99  45.0 SSMI16  13.4 -134.2   13.4 -134.2   13.3 -134.7 Analysis Plot     
     20141031 215000 -930.0      N/A   N/A  166.65  1255.9  45.0 SSMI17  13.6 -134.0   13.6 -134.0   13.6 -133.5 Analysis Plot     
     20141031 225500   -0.9      N/A  54.8%  22.22     .85  45.0 SSMI18  13.6 -133.9   13.1 -134.1   13.1 -134.1 Analysis Plot     
     20141101 090000   30.8  >65 kts  90.4%  44.44   15.76  55.0 SSMI17  13.6 -133.1   13.6 -133.1   13.7 -133.8 Analysis Plot     
     20141101 100800 -930.0      N/A   N/A   44.44  1238.8  55.0 SSMI18  13.7 -133.0   13.8 -133.7   13.8 -133.7 Analysis Plot     
     20141101 192200 -930.0      N/A   N/A   22.22  1247.2  75.0 SSMI16  15.1 -133.0   15.1 -133.1   15.1 -133.1 Analysis Plot     
     20141101 213600   55.7  >65 kts 100.0%  22.22   40.71  75.0 SSMI17  15.4 -132.9   15.3 -132.9   15.3 -132.9 Analysis Plot     
     20141101 224300   56.8  >65 kts 100.0%  22.22   41.82  75.0 SSMI18  15.5 -132.8   15.3 -132.9   15.3 -132.9 Analysis Plot     
     20141102 084800   42.9  >65 kts 100.0%  11.11   27.94 120.0 SSMI17  16.7 -132.7   16.7 -132.7   16.7 -132.7 Analysis Plot     
     20141102 174742 -930.0      N/A   N/A  333.30  1275.9 155.0 SSMI15  17.9 -132.3   17.9 -132.3   17.9 -132.1 Analysis Plot     
     20141102 212200   77.6  >85 kts 100.0%  22.22   62.56 155.0 SSMI17  18.3 -132.4   18.3 -132.5   18.3 -132.5 Analysis Plot     
     20141102 223100 -930.0      N/A   N/A   22.22  1259.6 155.0 SSMI18  18.4 -132.4   18.3 -132.6   18.3 -132.6 Analysis Plot     
     20141103 080200   70.9  >85 kts 100.0%  22.22   55.93 155.0 SSMI16  19.1 -133.1   19.1 -133.2   19.1 -133.2 Analysis Plot     
     20141103 083500   57.7  >65 kts 100.0%  22.22   42.73 155.0 SSMI17  19.2 -133.1   19.3 -133.5   19.3 -133.5 Analysis Plot     
     20141103 210800   42.3  >65 kts 100.0%  22.22   27.29 145.0 SSMI17  21.0 -134.6   20.9 -134.6   20.9 -134.6 Analysis Plot     
     20141104 075100   41.9  >65 kts 100.0%  22.22   26.93 125.0 SSMI16  22.3 -135.6   22.4 -135.7   22.4 -135.7 Analysis Plot     
     20141104 082400   43.3  >65 kts 100.0%  22.22   28.32 125.0 SSMI17  22.3 -135.7   22.5 -136.0   22.5 -136.0 Analysis Plot     
     20141104 202100 -930.0      N/A   N/A  211.09  1262.7 105.0 SSMI16  24.4 -137.2   24.4 -137.2   24.8 -136.7 Analysis Plot     
     20141104 205400   39.9  >65 kts 100.0% 144.43   24.94 105.0 SSMI17  24.5 -137.2   24.4 -137.1   24.4 -137.1 Analysis Plot     
     20141105 073800 -930.0      N/A   N/A  144.43  1274.0  90.0 SSMI16  25.9 -138.2   25.8 -138.5   25.8 -138.5 Analysis Plot     
     20141105 081100   16.2      N/A  60.3%  77.77   16.21  90.0 SSMI17  26.0 -138.3   26.2 -138.4   26.2 -138.4 Analysis Plot     
     20141105 200700 -930.0      N/A   N/A  177.76  1278.4  75.0 SSMI16  28.0 -140.3   28.0 -140.3   27.3 -140.1 Analysis Plot     
     20141105 204000    1.4      N/A  35.6%  77.77    1.41  75.0 SSMI17  28.1 -140.4   28.1 -140.4   27.9 -140.4 Analysis Plot     
     20141106 075900    4.4      N/A   8.2%  66.66    4.44  55.0 SSMI17  30.6 -142.3   30.6 -142.3   30.6 -142.8 Analysis Plot     
     20141106 202400 -930.0      N/A   N/A  211.09  1277.9  55.0 SSMI17  36.1 -148.6   36.1 -148.6   35.4 -149.7 Analysis Plot     
     20141106 213500 -930.0      N/A   N/A  266.64  1276.0  55.0 SSMI18  36.7 -149.5   36.7 -149.5   36.2 -149.4 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.