Tropical Depression 17L

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              
     20221107 093906 -930.0      N/A   N/A     N/A    0.00  40.0 SSMI18  25.5   68.5   25.5   68.5   25.6   67.7 Analysis Plot     
     20221107 121840   -2.7      N/A  19.2% 199.98    2.68  40.0 SSMI17  25.7   68.7   25.7   68.7   26.2   68.3 Analysis Plot     
     20221107 174122   -6.5      N/A   N/A   44.44    6.50  40.0  AMSR2  26.4   69.7   26.4   69.7   26.3   70.3 Analysis Plot     
     20221107 215723   -2.9      N/A   2.7% 166.65    2.95  40.0 SSMI16  26.6   70.6   26.6   70.6   26.1   70.6 Analysis Plot     
     20221107 222811 -930.0      N/A   N/A     N/A    0.00  40.0 SSMI17  26.8   70.2   26.8   70.2   26.1   70.1 Analysis Plot     
     20221108 113933   -0.8      N/A  24.7% 155.54     .84  40.0 SSMI16  27.7   71.9   27.7   71.9   28.2   71.2 Analysis Plot     
     20221108 164324   -6.0      N/A  12.3%  66.66    5.96  45.0    GMI  27.8   73.0   27.8   73.0   28.1   72.8 Analysis Plot     
     20221108 182448  -16.0      N/A  54.8%  33.33   15.95  45.0  AMSR2  27.7   73.2   27.7   73.2   27.5   73.6 Analysis Plot     
     20221109 060419 -930.0      N/A   N/A     N/A    0.00  55.0    GMI  27.0   75.3   27.0   75.3   26.7   75.4 Analysis Plot     
     20221109 063143    5.4      N/A   N/A   33.33    5.43  55.0  AMSR2  27.0   75.5   27.0   75.5   26.7   75.6 Analysis Plot     
     20221110 064600 -930.0      N/A   N/A     N/A    0.00  65.0    GMI  27.4   79.8   27.5   79.9   27.5   79.9 Analysis Plot     
     20221110 071413    6.4      N/A  17.8%  77.77    6.44  65.0  AMSR2  27.6   80.4   27.7   80.1   27.7   80.1 Analysis Plot     
     20221110 163142   -0.8      N/A  20.5%  44.44     .81  45.0    GMI  28.4   82.5   28.4   82.5   28.8   82.6 Analysis Plot     
     20221110 181414 -930.0      N/A   N/A     N/A    0.00  45.0  AMSR2  28.6   82.8   28.6   82.8   29.0   82.9 Analysis Plot     
     20221110 221842 -930.0      N/A   N/A     N/A    0.00  40.0 SSMI18  29.5   83.3   29.5   83.3   29.4   83.2 Analysis Plot     
     20221110 225950 -930.0      N/A   N/A     N/A    0.00  40.0 SSMI16  29.6   83.4   29.6   83.4   29.5   84.0 Analysis Plot     
     20221110 232535   -6.6      N/A   N/A  188.87    6.63  40.0 SSMI17  29.7   83.4   29.7   83.4   29.7   83.8 Analysis Plot     
     20221111 075639   -0.1      N/A   N/A   11.11     .12  30.0  AMSR2  31.8   84.5   31.8   84.5   31.9   84.5 Analysis Plot     
     20221111 124159   -1.1      N/A   N/A   22.22    1.09  30.0 SSMI16  32.7   84.3   32.7   84.3   32.5   84.9 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.