Tropical Depression 04L


Passive Microwave (PMW) Intensity Information
Hurricane Intensity Estimation (HIE) Algorithm
Version 8.1.4
 

         Overpass     Inten           Ring    Ring          Wind           Forecast        Final        Target  
       Date    Time   Score  Meaning   Pct    Diam  BTdiff   Est   Sat    Lat    Lon    Lat    Lon    Lat    Lon              
     20130724 075100   -5.1      N/A  19.2% 211.09    5.13  30.0 SSMI17  13.8   27.8   13.8   27.8   14.2   28.1 Analysis Plot     
     20130724 094300   -1.7      N/A  24.7%  55.55    1.74  30.0 SSMI18  14.0   28.4   14.0   28.4   13.9   28.9 Analysis Plot     
     20130724 193000   -8.1      N/A  13.7% 111.10    8.15  45.0 SSMI16  14.6   31.0   14.6   31.0   14.6   31.4 Analysis Plot     
     20130725 080500  -17.6      N/A 100.0%  22.22    2.57  45.0 SSMI16  15.6   35.1   15.6   35.1   15.8   34.3 Analysis Plot     
     20130725 172839   -2.2      N/A   6.8%  66.66    2.19  50.0   TRMM  16.2   36.7   16.2   36.7   16.1   37.0 Analysis Plot     
     20130725 203200   -1.3      N/A  21.9% 144.43    1.30  50.0 SSMI17  16.4   37.5   16.4   37.5   16.1   37.9 Analysis Plot     
     20130725 222300   -3.0      N/A   8.2%  77.77    2.99  50.0 SSMI18  16.5   38.0   16.5   38.0   16.3   38.2 Analysis Plot     
     20130726 014000   -1.2      N/A   N/A   22.22    1.16  45.0   TRMM  16.5   39.2   16.5   39.2   16.8   39.4 Analysis Plot     
     20130726 075200   -6.4      N/A   4.1% 155.54    6.41  45.0 SSMI16  17.1   41.3   17.1   41.3   17.4   41.3 Analysis Plot     
     20130726 090600   -4.1      N/A  19.2% 111.10    4.13  45.0 SSMI17  17.1   41.6   17.1   41.6   17.1   41.6 Analysis Plot     
     20130726 105800   -2.9      N/A  42.5% 111.10    2.86  45.0 SSMI18  17.3   42.3   17.3   42.3   17.3   42.1 Analysis Plot     
     20130726 202000    N/A      N/A   N/A     N/A     N/A  40.0 SSMI17  17.7   45.3   17.7   45.3   17.7   45.3 Analysis Plot     
     20130727 065428 -930.0      N/A   N/A  199.98    5.61  35.0 SSMI15  18.1   49.4   18.1   49.4   17.8   48.5 Analysis Plot     
     20130727 085400 -930.0      N/A   N/A  122.21   10.43  35.0 SSMI17  18.2   50.2   18.2   50.2   18.2   51.0 Analysis Plot     
     20130727 092200 -930.0      N/A   N/A   22.22     .97  35.0 SSMI16  18.3   50.3   18.3   50.3   18.5   50.9 Analysis Plot     
     20130727 171201   -8.2      N/A   N/A   66.66    8.23  35.0   TRMM  18.6   53.0   18.6   53.0   19.3   53.2 Analysis Plot     
     20130727 203400    N/A      N/A   N/A     N/A     N/A  35.0 SSMI16  18.7   53.8   18.7   53.8   18.7   53.8 Analysis Plot     
     20130727 214900 -930.0      N/A   N/A  188.87    5.92  35.0 SSMI17  18.8   54.3   18.8   54.3   19.1   55.0 Analysis Plot     
     20130727 234100   -1.5      N/A   8.2%  77.77    1.46  35.0 SSMI18  18.9   54.9   18.9   54.9   19.4   55.6 Analysis Plot     
     20130727 234100   -0.6      N/A  27.4%  55.55     .62  35.0 SSMI18  18.9   55.5   18.9   55.5   19.5   55.7 Analysis Plot     
     20130728 012240   -2.0      N/A   8.2% 199.98    2.02  35.0   TRMM  19.0   55.8   19.0   55.8   19.3   55.8 Analysis Plot     
     20130803 111100    N/A      N/A   N/A     N/A     N/A  30.0 SSMI16  29.1   79.0   29.1   79.0   29.1   79.0 Analysis Plot     
     20130803 171108   -2.6      N/A   N/A   22.22    2.56  30.0   TRMM  31.1   78.1   31.1   78.1   30.8   78.1 Analysis Plot     
     20130803 184837   -5.8      N/A   N/A   22.22    5.80  30.0   TRMM  31.2   78.0   31.2   78.0   31.3   77.3 Analysis Plot     
     20130803 202638   -3.3      N/A   N/A   22.22    3.33  25.0   TRMM  31.6   77.7   31.6   77.7   31.2   77.5 Analysis Plot     
     20130803 223100   -2.3      N/A   N/A   33.33    2.26  25.0 SSMI16  31.8   77.5   31.8   77.5   31.5   77.3 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.