Tropical Depression 01A

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              
     20180516 201332 -930.0      N/A   N/A     N/A    0.00  35.0    GMI  13.2  -49.3   13.2  -49.3   12.9  -48.8 Analysis Plot     
     20180516 220115   -3.0      N/A  38.4%  33.33    2.98  35.0  AMSR2  13.2  -49.2   13.2  -49.2   13.4  -49.3 Analysis Plot     
     20180517 023600   -4.7      N/A  46.6% 177.76    4.70  40.0 SSMI18  13.0  -48.6   13.0  -48.6   13.4  -49.2 Analysis Plot     
     20180517 032100   -5.1      N/A  44.6% 222.20    5.11  40.0 SSMI17  13.0  -48.6   13.0  -48.6   13.3  -49.1 Analysis Plot     
     20180517 074036   -5.9      N/A  19.2% 144.43    5.88  40.0    GMI  12.9  -48.4   12.9  -48.4   13.4  -48.8 Analysis Plot     
     20180517 102942  -11.0      N/A  69.9%  33.33   11.02  40.0  AMSR2  13.1  -48.5   13.1  -48.5   13.2  -48.0 Analysis Plot     
     20180517 135320 -930.0      N/A   N/A     N/A    0.00  40.0 SSMI15  13.0  -48.5   13.0  -48.5   13.2  -48.2 Analysis Plot     
     20180518 030900  -38.8      N/A 100.0%  33.33   23.82  45.0 SSMI17  11.8  -46.2   11.8  -46.2   11.8  -46.2 Analysis Plot     
     20180518 125355  -17.4      N/A 100.0%  11.11    2.45  50.0 SSMI15  11.4  -45.6   11.4  -45.6   11.5  -45.5 Analysis Plot     
     20180518 151600   -0.0      N/A   N/A     N/A    0.00  50.0 SSMI18  11.4  -45.3   11.4  -45.3   11.6  -45.3 Analysis Plot     
     20180518 200306   31.2  >65 kts 100.0%  11.11   16.16  55.0    GMI  11.2  -45.0   11.2  -45.0   11.1  -45.0 Analysis Plot     
     20180519 011200   14.3      N/A  79.5%  44.44   14.34  55.0 SSMI16  11.0  -44.6   11.0  -44.6   11.0  -44.6 Analysis Plot     
     20180519 073148  -38.5      N/A 100.0%  33.33   23.48  50.0    GMI  10.8  -44.1   10.8  -44.1   10.6  -44.0 Analysis Plot     
     20180519 101644   -0.0      N/A   N/A     N/A    0.00  50.0  AMSR2  10.7  -44.0   10.7  -44.0   10.5  -44.0 Analysis Plot     
     20180519 150200   -2.4      N/A  30.1% 111.10    2.36  50.0 SSMI18  10.1  -43.4   10.1  -43.4   10.2  -44.3 Analysis Plot     
     20180519 154500   -0.1      N/A  23.3%  44.44     .08  50.0 SSMI17  10.1  -43.4   10.1  -43.4   10.3  -44.0 Analysis Plot     
     20180519 223242  -42.9      N/A 100.0%  44.44   27.91  50.0  AMSR2   9.6  -42.8    9.6  -42.8    9.9  -43.1 Analysis Plot     
     20180520 014700   -3.8      N/A  28.8%  44.44    3.84  50.0 SSMI16   9.6  -42.7    9.6  -42.7   10.0  -42.7 Analysis Plot     
     20180520 034200   -7.8      N/A  11.0%  44.44    7.83  50.0 SSMI18   9.4  -42.5    9.4  -42.5    9.9  -42.0 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.