Tropical Storm 28L

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              
     20201024 213141   -1.1      N/A   6.8% 155.54    1.12  25.0 SSMI16  18.7   83.0   18.7   83.0   18.7   83.6 Analysis Plot     
     20201025 112446   -0.9      N/A   2.7%  99.99     .95  35.0 SSMI16  17.8   83.5   17.8   83.5   17.8   83.5 Analysis Plot     
     20201025 211911 -930.0      N/A   N/A     N/A    0.00  45.0 SSMI16  17.7   83.4   17.7   83.4   17.6   84.1 Analysis Plot     
     20201026 083511 -930.0      N/A   N/A     N/A    0.00  55.0    GMI  18.7   84.2   18.7   84.2   19.0   84.6 Analysis Plot     
     20201026 111137 -930.0      N/A   N/A     N/A    0.00  55.0 SSMI16  18.8   84.5   18.8   84.5   18.5   85.2 Analysis Plot     
     20201026 223007   13.7      N/A  53.4%  55.55   13.69  70.0 SSMI18  19.5   86.1   19.5   86.1   19.5   86.3 Analysis Plot     
     20201027 000817   13.4      N/A  46.6%  55.55   13.44  70.0 SSMI18  19.7   86.4   19.7   86.4   19.6   86.3 Analysis Plot     
     20201027 100410    N/A      N/A   N/A     N/A     N/A  65.0 SSMI15  21.2   88.7   21.2   88.7   20.4   88.7 Analysis Plot     
     20201027 122012    1.1      N/A   N/A   77.77    1.07  65.0 SSMI18  21.3   88.9   21.3   88.9   21.4   89.0 Analysis Plot     
     20201027 221659   19.3      N/A  57.5% 122.21   19.33  55.0 SSMI18  22.8   90.3   22.8   90.3   22.9   90.6 Analysis Plot     
     20201027 235545   19.4      N/A  52.1% 122.21   19.40  55.0 SSMI18  23.1   90.6   23.1   90.6   22.9   90.7 Analysis Plot     
     20201028 001414   16.6      N/A  47.9% 122.21   16.63  55.0 SSMI16  23.1   90.6   23.1   90.6   23.0   90.7 Analysis Plot     
     20201028 120708   19.0      N/A  56.2%  55.55   19.00  70.0 SSMI18  25.7   91.8   25.6   91.6   25.6   91.6 Analysis Plot     
     20201028 122721   16.0      N/A  58.9%  55.55   16.04  70.0 SSMI16  25.8   91.8   25.6   91.7   25.6   91.7 Analysis Plot     
     20201028 181131   45.1  >65 kts 100.0%  44.44   30.05  80.0    GMI  28.0   91.3   27.9   90.9   27.9   90.9 Analysis Plot     
     20201028 222110   45.8  >65 kts 100.0%  33.33   30.78  90.0 SSMI16  29.4   90.5   29.5   90.3   29.5   90.3 Analysis Plot     
     20201028 234317   43.2  >65 kts 100.0%  33.33   28.16  90.0 SSMI18  29.9   90.1   29.5   90.2   29.5   90.2 Analysis Plot     
     20201029 115430 -930.0      N/A   N/A     N/A    0.00  60.0 SSMI18  34.9   84.2   34.9   84.2   35.2   84.9 Analysis Plot     
     20201029 121412 -930.0      N/A   N/A     N/A    0.00  60.0 SSMI16  35.0   84.0   35.0   84.0   35.0   84.8 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.