Tropical Depression 20E


Passive Microwave (PMW) Intensity Information
Hurricane Intensity Estimation (HIE) Algorithm
Version 9.0
 

         Overpass     Inten           Ring    Ring          Wind           Forecast        Final        Target  
       Date    Time   Score  Meaning   Pct    Diam  BTdiff   Est   Sat    Lat    Lon    Lat    Lon    Lat    Lon              
     20180925 082547   -6.2      N/A  65.8%  22.22    6.21  30.0  AMSR2  14.5  107.2   14.6  107.3   14.6  107.3 Analysis Plot     
     20180925 102753 -930.0      N/A   N/A     N/A    0.00  30.0 SSMI15  14.6  107.3   14.6  107.3   13.7  107.2 Analysis Plot     
     20180925 164613   -4.6      N/A  20.5% 122.21    4.64  40.0    GMI  14.8  108.2   15.2  108.6   15.2  108.6 Analysis Plot     
     20180925 205455  -12.9      N/A  24.7%  55.55   12.88  45.0  AMSR2  15.0  108.8   14.7  109.0   14.7  109.0 Analysis Plot     
     20180925 230102   -0.4      N/A  26.0% 144.43     .41  45.0 SSMI16  15.1  109.1   15.1  109.1   15.0  109.3 Analysis Plot     
     20180926 004745   -0.7      N/A  21.9% 133.32     .68  45.0 SSMI16  15.1  109.3   15.1  109.3   15.0  109.3 Analysis Plot     
     20180926 012329   -0.1      N/A  17.8%  77.77     .14  45.0 SSMI18  15.2  109.3   14.8  109.6   14.8  109.6 Analysis Plot     
     20180926 015738    0.1      N/A   N/A   33.33     .13  55.0 SSMI17  15.0  109.4   15.0  109.4   15.0  109.4 Analysis Plot     
     20180926 030320    0.8      N/A  23.3%  77.77     .80  55.0 SSMI18  15.1  109.6   15.1  109.6   14.8  109.5 Analysis Plot     
     20180926 035434    0.6      N/A  21.9%  77.77     .63  55.0 SSMI17  15.1  109.7   15.1  109.7   14.9  109.4 Analysis Plot     
     20180926 090752    0.8      N/A  27.4%  44.44     .76  55.0  AMSR2  15.5  110.5   15.7  110.3   15.7  110.3 Analysis Plot     
     20180926 130719   40.0  >65 kts 100.0%  33.33   25.02  55.0 SSMI16  15.7  110.8   15.7  110.8   16.0  110.5 Analysis Plot     
     20180926 153950    N/A      N/A   N/A     N/A     N/A  65.0 SSMI17  16.1  111.4   16.3  111.1   16.3  111.1 Analysis Plot     
     20180926 225458   10.1      N/A  27.4%  77.77   10.07  70.0 SSMI16  16.5  112.4   16.5  112.4   16.7  112.2 Analysis Plot     
     20180927 031952   44.2  >65 kts 100.0% 122.21   29.22  75.0    GMI  16.9  113.2   16.7  113.1   16.7  113.1 Analysis Plot     
     20180927 032624   18.8      N/A  41.1% 111.10   18.80  75.0 SSMI17  16.9  113.0   16.6  112.8   16.6  112.8 Analysis Plot     
     20180927 113115   52.1  >65 kts 100.0%  66.66   37.14  75.0 SSMI15  17.1  114.5   17.1  114.6   17.1  114.6 Analysis Plot     
     20180927 125404   62.7  >85 kts 100.0%  55.55   47.70  75.0 SSMI16  17.1  114.6   17.2  114.6   17.2  114.6 Analysis Plot     
     20180927 145448   63.2  >85 kts 100.0%  55.55   48.21  85.0 SSMI18  17.2  115.3   17.0  115.0   17.0  115.0 Analysis Plot     
     20180927 152825   53.3  >65 kts 100.0%  44.44   38.30  85.0 SSMI17  17.2  115.3   17.0  115.0   17.0  115.0 Analysis Plot     
     20180927 163637 -930.0      N/A   N/A     N/A    0.00  85.0    GMI  17.2  115.7   17.2  115.7   16.9  115.5 Analysis Plot     
     20180927 163645 -930.0      N/A   N/A     N/A    0.00  85.0    GMI  17.2  115.7   17.0  115.4   17.0  115.4 Analysis Plot     
     20180927 204340   81.1  >85 kts 100.0%  44.44   66.13 105.0  AMSR2  16.9  115.8   16.9  115.9   16.9  115.9 Analysis Plot     
     20180928 005842 -930.0      N/A   N/A     N/A    0.00 105.0 SSMI18  16.9  116.3   16.8  116.3   16.8  116.3 Analysis Plot     
     20180928 024106   80.6  >85 kts 100.0%  44.44   65.63 125.0 SSMI18  16.9  116.6   16.9  116.5   16.9  116.5 Analysis Plot     
     20180928 111537   53.0  >65 kts 100.0% 111.10   38.02 125.0 SSMI15  17.0  117.6   17.0  117.3   17.0  117.3 Analysis Plot     
     20180928 144303   58.2  >65 kts 100.0% 111.10   43.17 120.0 SSMI18  17.1  117.4   17.2  117.4   17.2  117.4 Analysis Plot     
     20180928 151553 -930.0      N/A   N/A     N/A    0.00 120.0 SSMI17  17.2  117.5   17.1  117.4   17.1  117.4 Analysis Plot     
     20180928 212628   13.6      N/A  17.8% 133.32   13.61 105.0  AMSR2  17.7  117.8   17.6  117.8   17.6  117.8 Analysis Plot     
     20180929 000815 -930.0      N/A   N/A     N/A    0.00 105.0 SSMI16  17.9  117.9   17.9  118.0   17.9  118.0 Analysis Plot     
     20180929 030952    5.6      N/A  13.7% 122.21    5.59  95.0    GMI  18.4  118.0   18.3  118.0   18.3  118.0 Analysis Plot     
     20180929 093742   14.4      N/A  37.0% 122.21   14.43  85.0  AMSR2  19.4  118.2   19.5  118.4   19.5  118.4 Analysis Plot     
     20180929 143143 -930.0      N/A   N/A     N/A    0.00  85.0 SSMI18  20.3  118.4   20.1  118.4   20.1  118.4 Analysis Plot     
     20180929 162756    8.6      N/A  20.5%  99.99    8.57  85.0    GMI  20.8  118.4   20.6  118.6   20.6  118.6 Analysis Plot     
     20180929 235728    6.2      N/A   N/A   66.66    6.16  90.0 SSMI16  21.7  118.7   21.7  118.9   21.7  118.9 Analysis Plot     
     20180930 042320    2.3      N/A   N/A   88.88    2.25  85.0 SSMI17  22.5  118.9   22.2  118.9   22.2  118.9 Analysis Plot     
     20180930 134043    1.3      N/A   4.1% 155.54    1.30  80.0 SSMI16  24.0  118.6   24.0  118.6   23.7  118.7 Analysis Plot     
     20180930 162646 -930.0      N/A   N/A     N/A    0.00  65.0 SSMI17  24.5  118.6   24.5  118.6   24.1  118.5 Analysis Plot     
     20180930 211603 -930.0      N/A   N/A     N/A    0.00  65.0  AMSR2  25.2  118.1   25.2  118.1   24.9  118.0 Analysis Plot     
     20180930 234415    0.2      N/A   N/A  188.87     .22  65.0 SSMI16  25.5  117.9   25.5  117.9   24.9  117.8 Analysis Plot     
     20181001 041034    1.8      N/A   5.5% 222.20    1.76  55.0 SSMI17  26.0  117.6   26.0  117.6   25.4  117.5 Analysis Plot     
     20181001 133431   -2.2      N/A   N/A  122.21    2.22  40.0 SSMI16  27.2  116.7   27.2  116.7   27.3  116.6 Analysis Plot     
     20181001 161324   -0.7      N/A   N/A   22.22     .72  40.0 SSMI17  27.6  116.5   27.6  116.5   27.4  116.2 Analysis Plot     
     20181001 233100   -0.4      N/A   N/A  111.10     .44  35.0 SSMI16  28.4  116.1   28.4  116.1   28.0  115.3 Analysis Plot     
     20181002 035802   -1.9      N/A   N/A   99.99    1.94  35.0 SSMI17  28.9  115.3   28.9  115.3   28.4  114.9 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.