Tropical Depression 30W


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              
     20161221 083100   -1.8      N/A  12.3%  55.55    1.80  25.0 SSMI17   6.9 -141.1    6.9 -141.1    6.7 -141.6 Analysis Plot     
     20161221 085100   -0.8      N/A  19.2%  77.77     .84  25.0 SSMI18   7.0 -141.0    7.0 -141.0    6.7 -141.6 Analysis Plot     
     20161221 160939   -2.0      N/A  28.8%  55.55    1.96  30.0  AMSR2   7.4 -140.2    7.4 -140.2    7.8 -140.3 Analysis Plot     
     20161221 194321   -0.8      N/A  57.5%  33.33     .80  35.0    GMI   8.1 -139.9    8.1 -139.9    8.2 -139.6 Analysis Plot     
     20161221 211000   -0.0      N/A   N/A     N/A    0.00  35.0 SSMI17   8.3 -139.6    8.3 -139.6    8.5 -139.2 Analysis Plot     
     20161221 213100   -1.0      N/A  45.2%  44.44    1.04  35.0 SSMI18   8.4 -139.6    8.4 -139.6    8.5 -139.2 Analysis Plot     
     20161222 043624   -0.0      N/A   N/A     N/A    0.00  40.0  AMSR2   9.3 -138.1    9.3 -138.1    9.3 -138.1 Analysis Plot     
     20161222 071246   -6.3      N/A  57.5% 111.10    6.30  40.0    GMI   9.5 -137.6   10.0 -137.5   10.0 -137.5 Analysis Plot     
     20161222 074700   -1.3      N/A  52.1%  55.55    1.27  40.0 SSMI16   9.4 -137.8    9.1 -138.0    9.1 -138.0 Analysis Plot     
     20161222 165207  -17.6      N/A  87.7%  22.22    2.59  45.0  AMSR2  10.6 -135.4   11.0 -135.0   11.0 -135.0 Analysis Plot     
     20161222 195000   40.7  >65 kts 100.0%  44.44   25.68  55.0 SSMI16  10.9 -134.9   10.9 -134.9   11.4 -134.6 Analysis Plot     
     20161223 222400   61.8  >85 kts 100.0%  22.22   46.76  90.0 SSMI17  13.3 -129.3   13.0 -129.1   13.0 -129.1 Analysis Plot     
     20161223 224700   41.6  >65 kts 100.0%  22.22   26.62  90.0 SSMI18  13.3 -129.2   13.1 -129.1   13.1 -129.1 Analysis Plot     
     20161223 224700   37.8  >65 kts 100.0%  22.22   22.83  90.0 SSMI18  13.3 -129.2   13.1 -129.1   13.1 -129.1 Analysis Plot     
     20161224 042535   59.7  >65 kts 100.0%  11.11   44.70 110.0  AMSR2  13.2 -128.5   13.2 -128.4   13.2 -128.4 Analysis Plot     
     20161224 070122   38.2  >65 kts 100.0%  11.11   23.17 110.0    GMI  13.4 -128.1   13.3 -128.1   13.3 -128.1 Analysis Plot     
     20161224 191619   65.1  >85 kts 100.0%  22.22   50.13 130.0 SSMI15  13.6 -126.6   13.6 -126.7   13.6 -126.7 Analysis Plot     
     20161224 201550 -930.0      N/A   N/A     N/A    0.00 130.0    GMI  13.6 -126.4   13.6 -126.4   13.9 -126.3 Analysis Plot     
     20161224 211400   55.8  >65 kts 100.0%  22.22   40.81 130.0 SSMI16  13.6 -126.5   13.6 -126.4   13.6 -126.4 Analysis Plot     
     20161224 221000   51.6  >65 kts 100.0%  22.22   36.64 130.0 SSMI17  13.6 -126.1   13.6 -126.2   13.6 -126.2 Analysis Plot     
     20161224 223400   43.5  >65 kts 100.0%  22.22   28.52 130.0 SSMI18  13.6 -126.1   13.5 -126.1   13.5 -126.1 Analysis Plot     
     20161225 050755   -0.0      N/A   N/A     N/A    0.00 135.0  AMSR2  13.5 -125.4   13.5 -125.4   13.5 -125.4 Analysis Plot     
     20161225 183658 -930.0      N/A   N/A     N/A    0.00 100.0 SSMI15  13.5 -123.0   13.5 -123.0   13.0 -123.9 Analysis Plot     
     20161225 202300   28.8  >65 kts 100.0%  33.33   13.79 100.0 SSMI16  13.5 -122.8   13.4 -122.3   13.4 -122.3 Analysis Plot     
     20161225 215700   28.1  >65 kts 100.0%  33.33   13.07 100.0 SSMI17  13.5 -122.6   13.3 -121.8   13.3 -121.8 Analysis Plot     
     20161225 222200   33.4  >65 kts 100.0%  33.33   18.43 100.0 SSMI18  13.5 -122.6   13.4 -121.8   13.4 -121.8 Analysis Plot     
     20161226 065043    4.5      N/A  46.6%  55.55    4.54  80.0    GMI  14.0 -120.1   14.0 -120.1   14.1 -119.8 Analysis Plot     
     20161226 090153 -930.0      N/A   N/A     N/A    0.00  80.0 SSMI15  14.0 -120.2   14.0 -120.2   14.1 -119.8 Analysis Plot     
     20161226 200628 -930.0      N/A   N/A     N/A    0.00  65.0    GMI  14.9 -117.0   15.3 -116.9   15.3 -116.9 Analysis Plot     
     20161227 081752    3.0      N/A   N/A   66.66    3.03  60.0 SSMI15  15.0 -115.6   15.0 -115.6   14.9 -115.7 Analysis Plot     
     20161227 201845   -0.1      N/A   N/A   22.22     .08  30.0 SSMI15  13.2 -114.5   13.2 -114.5   13.8 -113.6 Analysis Plot     
     20161227 233800   -2.9      N/A   N/A   66.66    2.93  30.0 SSMI18  12.7 -113.9   12.7 -113.9   13.3 -112.8 Analysis Plot     
     20161228 053854   -3.0      N/A   N/A   77.77    3.03  25.0  AMSR2  12.4 -112.4   12.4 -112.4   12.1 -111.9 Analysis Plot     
     20161228 195503   -4.6      N/A   N/A  133.32    4.63  25.0    GMI  10.4 -110.2   10.4 -110.2   10.2 -110.3 Analysis Plot     
     20161228 200705 -930.0      N/A   N/A     N/A    0.00  25.0 SSMI15  10.5 -110.3   10.5 -110.3   10.6 -109.9 Analysis Plot     
     20161228 220300   -0.4      N/A   N/A   77.77     .44  25.0 SSMI16  10.4 -110.2   10.4 -110.2   10.3 -110.3 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.