Tropical Depression 11L

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              
     20200812 042515  -11.5      N/A  17.8% 144.43   11.49  30.0  AMSR2  12.1   41.9   12.1   41.9   12.3   41.8 Analysis Plot     
     20200812 064928   -3.6      N/A   N/A   33.33    3.61  30.0 SSMI15  12.1   42.3   12.1   42.3   12.3   42.4 Analysis Plot     
     20200812 085427   -2.5      N/A   9.6% 122.21    2.51  30.0 SSMI16  12.2   42.7   12.2   42.7   12.3   42.6 Analysis Plot     
     20200812 184816   -1.4      N/A   8.2% 155.54    1.42  30.0 SSMI16  12.5   44.8   12.5   44.8   12.8   44.7 Analysis Plot     
     20200812 194635   -1.4      N/A   9.6% 188.87    1.37  30.0 SSMI18  12.6   45.0   12.6   45.0   12.8   44.9 Analysis Plot     
     20200813 050831    N/A      N/A   N/A     N/A     N/A  30.0  AMSR2  12.6   47.6   12.6   47.6   12.5   47.6 Analysis Plot     
     20200813 084119   -1.4      N/A   9.6% 199.98    1.36  30.0 SSMI16  12.8   47.6   12.8   47.6   13.1   47.9 Analysis Plot     
     20200813 093623   -2.1      N/A   6.8% 222.20    2.12  30.0 SSMI18  12.9   47.8   12.9   47.8   12.8   47.8 Analysis Plot     
     20200813 193424 -930.0      N/A   N/A     N/A    0.00  40.0 SSMI18  14.0   50.0   14.0   50.0   13.9   50.7 Analysis Plot     
     20200814 080633   -8.7      N/A   5.5% 166.65    8.71  35.0 SSMI15  15.2   53.1   15.2   53.1   15.4   53.5 Analysis Plot     
     20200814 093332   -4.4      N/A  12.3% 188.87    4.38  35.0 SSMI18  15.3   53.2   15.3   53.2   15.4   53.6 Analysis Plot     
     20200814 144346    N/A      N/A   N/A     N/A     N/A  35.0    GMI  16.1   54.6   16.1   54.6   17.0   54.9 Analysis Plot     
     20200814 164305   -1.1      N/A   8.2%  22.22    1.10  35.0  AMSR2  16.2   55.0   16.2   55.0   17.2   55.2 Analysis Plot     
     20200814 195412   -1.8      N/A  11.0% 222.20    1.80  35.0 SSMI16  16.6   55.6   16.6   55.6   16.7   56.0 Analysis Plot     
     20200814 213625 -930.0      N/A   N/A     N/A    0.00  35.0 SSMI16  17.8   56.0   17.8   56.0   16.9   55.9 Analysis Plot     
     20200815 095619 -920.0      N/A 100.0%  11.11    7.60  40.0 SSMI16  18.9   58.4   18.9   58.4   19.0   58.3 Analysis Plot     
     20200815 172627   -8.1      N/A  15.1% 133.32    8.13  40.0  AMSR2  19.3   60.6   19.3   60.6   19.6   60.8 Analysis Plot     
     20200815 195051   -1.4      N/A  11.0% 188.87    1.40  40.0 SSMI16  19.4   61.0   19.4   61.0   18.7   60.8 Analysis Plot     
     20200815 204813   -2.1      N/A   N/A   55.55    2.13  40.0 SSMI18  19.9   61.4   19.9   61.4   20.5   61.6 Analysis Plot     
     20200815 223029   -1.2      N/A   N/A   22.22    1.25  40.0 SSMI18  20.1   61.7   20.1   61.7   20.5   61.8 Analysis Plot     
     20200816 094305   -1.2      N/A   N/A   55.55    1.18  35.0 SSMI16  20.3   64.0   20.3   64.0   20.0   63.8 Analysis Plot     
     20200816 103937   -2.2      N/A   N/A   44.44    2.25  35.0 SSMI18  20.4   64.1   20.4   64.1   20.3   64.0 Analysis Plot     
     20200816 181100 -930.0      N/A   N/A     N/A    0.00  30.0  AMSR2  20.6   65.4   20.6   65.4   20.6   65.2 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.