Tropical Depression 13S

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              
     20200215 140756    N/A      N/A   N/A     N/A     N/A  35.0 SSMI16 -19.3  -48.0  -19.3  -48.0  -20.2  -48.6 Analysis Plot     
     20210121 064249 -930.0      N/A   N/A     N/A    0.00  35.0  AMSR2 -12.4  -96.8  -12.4  -96.8  -12.5  -97.5 Analysis Plot     
     20210121 105912   -1.2      N/A   1.4% 155.54    1.24  35.0 SSMI15 -12.5  -96.6  -12.5  -96.6  -12.8  -96.8 Analysis Plot     
     20210121 110204   -1.3      N/A  12.3% 177.76    1.29  35.0 SSMI18 -12.5  -96.5  -12.5  -96.5  -12.9  -96.4 Analysis Plot     
     20210121 190938   -2.8      N/A  13.7%  22.22    2.77  35.0  AMSR2 -12.9  -97.3  -12.9  -97.3  -13.1  -97.3 Analysis Plot     
     20210121 221905    N/A      N/A   N/A     N/A     N/A  35.0 SSMI15 -12.9  -97.2  -12.9  -97.2  -12.8  -96.7 Analysis Plot     
     20210121 224314    N/A      N/A   N/A     N/A     N/A  35.0 SSMI18 -12.9  -97.2  -12.9  -97.2  -12.9  -96.7 Analysis Plot     
     20210122 062121 -930.0      N/A   N/A     N/A    0.00  35.0    GMI -13.5  -97.5  -13.5  -97.5  -13.4  -97.5 Analysis Plot     
     20210122 072404   -6.5      N/A   6.8% 177.76    6.47  35.0  AMSR2 -13.5  -97.5  -13.5  -97.5  -13.3  -97.5 Analysis Plot     
     20210122 105431   -3.3      N/A  12.3% 122.21    3.27  35.0 SSMI15 -13.5  -97.6  -13.5  -97.6  -13.4  -97.2 Analysis Plot     
     20210122 221456   -6.6      N/A  28.8%  66.66    6.65  35.0 SSMI16 -13.7  -97.4  -13.7  -97.4  -13.8  -96.5 Analysis Plot     
     20210122 222814 -930.0      N/A   N/A     N/A    0.00  35.0 SSMI18 -13.7  -97.4  -13.7  -97.4  -13.8  -97.0 Analysis Plot     
     20210123 101627    N/A      N/A   N/A     N/A     N/A  35.0 SSMI16 -14.7  -97.2  -14.7  -97.2  -14.6  -96.5 Analysis Plot     
     20210123 110237   -1.9      N/A   N/A  222.20    1.94  35.0 SSMI15 -14.7  -97.2  -14.7  -97.2  -14.8  -97.7 Analysis Plot     
     20210123 185757   -4.3      N/A   N/A  155.54    4.29  35.0  AMSR2 -15.6  -97.6  -15.6  -97.6  -16.3  -97.5 Analysis Plot     
     20210124 071051   -2.3      N/A   6.8% 188.87    2.33  35.0  AMSR2 -16.5  -97.4  -16.5  -97.4  -16.5  -97.1 Analysis Plot     
     20210124 102403    N/A      N/A   N/A     N/A     N/A  35.0 SSMI18 -16.6  -97.3  -16.6  -97.3  -15.7  -96.3 Analysis Plot     
     20210125 164321  -17.0      N/A 100.0%  22.22    2.02  35.0    GMI -17.8  -95.2  -18.6  -94.6  -18.6  -94.6 Analysis Plot     
     20210125 184637    N/A      N/A   N/A     N/A     N/A  35.0  AMSR2 -17.8  -95.1  -17.8  -95.1  -18.3  -94.8 Analysis Plot     
     20210125 224234    N/A      N/A   N/A     N/A     N/A  35.0 SSMI15 -17.9  -95.0  -17.9  -95.0  -18.6  -95.1 Analysis Plot     
     20210125 230638    N/A      N/A   N/A     N/A     N/A  35.0 SSMI16 -18.0  -95.0  -18.0  -95.0  -19.0  -94.9 Analysis Plot     
     20210126 065923   -1.9      N/A  46.6%  22.22    1.94  35.0  AMSR2 -18.3  -94.0  -18.3  -94.0  -19.3  -94.2 Analysis Plot     
     20210126 111930   -0.3      N/A  12.3% 144.43     .31  35.0 SSMI15 -18.4  -93.7  -18.4  -93.7  -19.2  -94.3 Analysis Plot     
     20210126 193008 -930.0      N/A   N/A     N/A    0.00  35.0  AMSR2 -19.3  -92.7  -19.3  -92.7  -19.5  -90.7 Analysis Plot     
     20210126 225327    N/A      N/A   N/A     N/A     N/A  35.0 SSMI16 -19.4  -92.4  -19.4  -92.4  -20.2  -93.0 Analysis Plot     
     20210126 231613 -930.0      N/A   N/A     N/A    0.00  35.0 SSMI18 -19.4  -92.3  -19.4  -92.3  -20.2  -93.0 Analysis Plot     
     20210127 074056   -2.4      N/A   1.4% 222.20    2.35  35.0  AMSR2 -19.3  -90.6  -19.3  -90.6  -19.5  -90.9 Analysis Plot     
     20210127 113638   -2.3      N/A   N/A  211.09    2.30  35.0 SSMI15 -19.3  -90.2  -19.3  -90.2  -19.5  -90.4 Analysis Plot     
     20210127 163238 -930.0      N/A   N/A     N/A    0.00  35.0    GMI -19.2  -88.9  -19.2  -88.9  -19.5  -88.8 Analysis Plot     
     20210127 224024   -1.1      N/A   N/A   33.33    1.12  30.0 SSMI16 -19.1  -87.8  -19.1  -87.8  -19.0  -88.2 Analysis Plot     
     20210127 230503   -1.3      N/A   N/A   66.66    1.32  30.0 SSMI18 -19.1  -87.7  -19.1  -87.7  -18.8  -88.2 Analysis Plot     
     20210128 105131   -1.6      N/A   N/A   55.55    1.59  25.0 SSMI16 -18.6  -84.3  -18.6  -84.3  -18.9  -84.3 Analysis Plot     
     20210128 111418   -1.6      N/A   N/A  166.65    1.65  25.0 SSMI18 -18.5  -84.2  -18.5  -84.2  -18.5  -84.7 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.