Tropical Depression 30L

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              
     20201110 092251    N/A      N/A   N/A     N/A     N/A  45.0 SSMI18  28.8   39.6   28.8   39.6   29.0   38.8 Analysis Plot     
     20201110 192123    4.5      N/A   N/A   77.77    4.53  60.0 SSMI18  29.0   36.7   29.0   36.7   29.2   36.6 Analysis Plot     
     20201110 205955 -930.0      N/A   N/A     N/A    0.00  60.0 SSMI18  29.4   36.3   29.4   36.3   29.2   36.4 Analysis Plot     
     20201111 010517 -930.0      N/A   N/A     N/A    0.00  60.0    GMI  29.6   35.5   29.3   36.0   29.3   36.0 Analysis Plot     
     20201111 091007    1.2      N/A  16.4% 111.10    1.17  60.0 SSMI18  29.4   34.8   29.4   34.8   29.3   34.4 Analysis Plot     
     20201111 180051 -930.0      N/A   N/A     N/A    0.00  55.0 SSMI16  29.9   33.0   29.9   33.0   30.2   32.0 Analysis Plot     
     20201111 191010 -930.0      N/A   N/A     N/A    0.00  55.0 SSMI18  30.0   32.8   30.0   32.8   30.9   32.7 Analysis Plot     
     20201111 204718 -930.0      N/A   N/A     N/A    0.00  55.0 SSMI18  30.1   32.5   30.1   32.5   30.9   32.7 Analysis Plot     
     20201112 001344   -7.1      N/A   N/A   77.77    7.14  50.0    GMI  30.7   31.3   30.9   31.8   30.9   31.8 Analysis Plot     
     20201112 085726    3.9      N/A   N/A   66.66    3.85  55.0 SSMI18  31.7   30.4   31.7   30.4   31.7   30.4 Analysis Plot     
     20201112 095744    5.5      N/A  12.3%  66.66    5.47  55.0    GMI  31.7   30.0   31.6   30.1   31.6   30.1 Analysis Plot     
     20201112 172439    2.3      N/A   N/A   77.77    2.26  55.0 SSMI16  31.6   28.5   31.6   28.5   31.5   28.2 Analysis Plot     
     20201113 034839   -4.4      N/A   6.8%  22.22    4.37  50.0  AMSR2  31.7   25.7   31.9   25.7   31.9   25.7 Analysis Plot     
     20201113 070706 -930.0      N/A   N/A     N/A    0.00  50.0 SSMI16  31.7   25.4   31.7   25.4   31.4   25.6 Analysis Plot     
     20201113 082116 -930.0      N/A   N/A     N/A    0.00  55.0 SSMI18  31.8   25.4   31.8   25.4   31.9   25.7 Analysis Plot     
     20201113 090616   -5.4      N/A  20.5%  33.33    5.43  50.0    GMI  31.8   24.9   32.3   25.1   32.3   25.1 Analysis Plot     
     20201113 144857   -3.4      N/A   5.5%  44.44    3.39  50.0  AMSR2  31.7   24.0   31.7   24.0   31.8   23.8 Analysis Plot     
     20201113 171135   -4.1      N/A   N/A   88.88    4.09  50.0 SSMI16  31.7   23.5   31.7   23.5   31.6   23.4 Analysis Plot     
     20201114 025350   -1.1      N/A   N/A   11.11    1.14  45.0  AMSR2  31.9   21.5   31.9   21.5   32.0   21.6 Analysis Plot     
     20201114 065359 -930.0      N/A   N/A     N/A    0.00  45.0 SSMI16  31.9   21.2   31.9   21.2   31.8   21.3 Analysis Plot     
     20201114 165828   -0.2      N/A   6.8% 222.20     .24  35.0 SSMI16  31.8   20.0   31.8   20.0   31.5   19.9 Analysis Plot     
     20201115 033651   -4.7      N/A   N/A   11.11    4.70  35.0  AMSR2  31.7   18.6   31.7   18.6   31.6   18.4 Analysis Plot     
     20201115 064055   -0.9      N/A   N/A   11.11     .95  35.0 SSMI16  31.7   18.5   31.7   18.5   31.5   18.2 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.