Tropical Depression 20P

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              
     20160420 035316   -9.6      N/A  78.1%  33.33    9.59  30.0 SSMI15 -13.0  178.4  -13.0  178.4  -13.0  178.6 Analysis Plot     
     20160420 051640 -930.0      N/A   N/A     N/A    0.00  30.0    GMI -13.0  178.6  -13.0  178.6  -13.4  179.1 Analysis Plot     
     20160420 071400   -1.3      N/A  38.4%  88.88    1.27  35.0 SSMI18 -12.8  178.6  -12.8  178.6  -13.0  179.2 Analysis Plot     
     20160420 162800 -930.0      N/A   N/A     N/A    0.00  35.0 SSMI16 -12.8  178.9  -12.8  178.9  -12.8  179.6 Analysis Plot     
     20160420 182500 -930.0      N/A   N/A     N/A    0.00  40.0 SSMI18 -12.6  179.6  -12.6  179.6  -12.9  179.9 Analysis Plot     
     20160421 043700  -12.6      N/A  54.8%  55.55   12.62  45.0 SSMI16 -12.5  179.4  -12.5  179.4  -13.1  179.4 Analysis Plot     
     20160421 065000  -34.1      N/A  97.3%  33.33   19.14  45.0 SSMI17 -13.0  179.3  -13.0  179.3  -12.8  179.1 Analysis Plot     
     20160421 070200  -35.9      N/A 100.0%  33.33   20.88  45.0 SSMI18 -13.0  179.3  -13.0  179.3  -12.9  179.1 Analysis Plot     
     20160421 132249   32.1  >65 kts  86.3%  22.22   17.11  55.0  AMSR2 -12.7  178.7  -12.5  178.7  -12.5  178.7 Analysis Plot     
     20160421 155225   28.8  >65 kts  93.2%  11.11   13.78  55.0    GMI -12.7  178.5  -12.5  178.3  -12.5  178.3 Analysis Plot     
     20160421 175900   10.2      N/A  56.2% 211.09   10.20  55.0 SSMI17 -12.7  178.3  -12.9  177.7  -12.9  177.7 Analysis Plot     
     20160422 013739   -0.0      N/A   N/A     N/A    0.00  65.0  AMSR2 -12.4  177.3  -12.4  177.3  -12.4  177.3 Analysis Plot     
     20160422 064900   51.0  >65 kts 100.0%  22.22   35.98  75.0 SSMI18 -12.5  177.0  -12.4  176.9  -12.4  176.9 Analysis Plot     
     20160422 150003   44.1  >65 kts 100.0%  11.11   29.14  90.0    GMI -12.5  176.0  -12.3  176.1  -12.3  176.1 Analysis Plot     
     20160422 174600    1.8      N/A  23.3%  99.99    1.79  90.0 SSMI17 -12.5  175.7  -12.3  175.5  -12.3  175.5 Analysis Plot     
     20160423 063700    8.3      N/A  24.7% 199.98    8.31  90.0 SSMI18 -12.6  174.3  -12.9  173.3  -12.9  173.3 Analysis Plot     
     20160423 131103   37.0  >65 kts 100.0%  55.55   21.99  90.0  AMSR2 -13.5  171.9  -13.6  171.3  -13.6  171.3 Analysis Plot     
     20160423 173300 -930.0      N/A   N/A     N/A    0.00  90.0 SSMI17 -13.8  171.4  -13.8  171.4  -14.0  170.5 Analysis Plot     
     20160424 032401    3.1      N/A   N/A   88.88    3.07  70.0    GMI -14.0  170.7  -14.0  170.7  -13.6  170.8 Analysis Plot     
     20160424 062400   -0.0      N/A   N/A     N/A    0.00  70.0 SSMI18 -14.1  170.4  -14.1  170.4  -13.6  170.2 Analysis Plot     
     20160424 121614   -7.4      N/A   N/A  188.87    7.44  40.0  AMSR2 -13.7  169.5  -13.7  169.5  -14.1  169.9 Analysis Plot     
     20160424 171900   -2.5      N/A   N/A  199.98    2.52  40.0 SSMI17 -13.7  169.2  -13.7  169.2  -13.8  169.3 Analysis Plot     
     20160425 002940   -4.7      N/A  20.5% 211.09    4.66  35.0  AMSR2 -14.9  167.6  -14.9  167.6  -14.6  167.2 Analysis Plot     
     20160425 023140  -15.0      N/A 100.0%  22.22     .05  35.0    GMI -15.2  167.3  -14.3  165.8  -14.3  165.8 Analysis Plot     
     20160425 034300   -3.3      N/A   N/A  188.87    3.29  35.0 SSMI16 -15.1  167.4  -15.1  167.4  -14.8  167.8 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.