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              
     20200204 205039    N/A      N/A   N/A     N/A     N/A  35.0  AMSR2 -16.2  -66.8  -16.2  -66.8  -16.6  -67.7 Analysis Plot     
     20200205 002151    N/A      N/A   N/A     N/A     N/A  35.0 SSMI15 -16.5  -67.1  -16.5  -67.1  -16.7  -67.9 Analysis Plot     
     20200205 003518    N/A      N/A   N/A     N/A     N/A  35.0 SSMI16 -16.5  -67.2  -16.5  -67.2  -16.6  -68.1 Analysis Plot     
     20200205 090308    N/A      N/A   N/A     N/A     N/A  40.0  AMSR2 -17.3  -68.5  -17.3  -68.5  -17.8  -69.5 Analysis Plot     
     20200205 124654 -930.0      N/A   N/A     N/A    0.00  35.0 SSMI16 -17.7  -68.4  -17.7  -68.4  -17.7  -68.6 Analysis Plot     
     20200205 145517 -930.0      N/A   N/A     N/A    0.00  40.0    GMI -17.8  -69.1  -17.8  -69.1  -17.3  -70.0 Analysis Plot     
     20200205 234532 -930.0      N/A   N/A     N/A    0.00  40.0 SSMI15 -17.9  -70.5  -17.9  -70.5  -17.9  -71.3 Analysis Plot     
     20200206 002214   -0.9      N/A   N/A  188.87     .91  40.0 SSMI16 -18.0  -70.5  -18.0  -70.5  -17.8  -71.1 Analysis Plot     
     20200206 124145 -930.0      N/A   N/A     N/A    0.00  35.0 SSMI16 -19.5  -71.7  -19.5  -71.7  -19.7  -71.9 Analysis Plot     
     20200206 131807    N/A      N/A   N/A     N/A     N/A  35.0 SSMI15 -19.4  -71.7  -19.4  -71.7  -20.0  -72.1 Analysis Plot     
     20200213 222416  -14.0      N/A  56.2%  44.44   14.02  40.0  AMSR2 -18.6  -49.7  -18.4  -49.8  -18.4  -49.8 Analysis Plot     
     20200214 010048  -13.0      N/A  28.8%  33.33   13.04  40.0 SSMI15 -18.7  -49.7  -18.7  -49.7  -18.4  -49.8 Analysis Plot     
     20200214 014820 -930.0      N/A   N/A     N/A    0.00  40.0 SSMI18 -18.7  -49.6  -18.7  -49.6  -18.5  -49.9 Analysis Plot     
     20200214 020230 -930.0      N/A   N/A     N/A    0.00  40.0 SSMI16 -18.8  -49.6  -18.8  -49.6  -18.8  -49.6 Analysis Plot     
     20200214 103515    N/A      N/A   N/A     N/A     N/A  40.0  AMSR2 -19.0  -49.2  -19.0  -49.2  -19.0  -49.2 Analysis Plot     
     20200214 135108    N/A      N/A   N/A     N/A     N/A  40.0 SSMI18 -19.1  -49.1  -19.1  -49.1  -19.6  -49.6 Analysis Plot     
     20200214 141419    N/A      N/A   N/A     N/A     N/A  40.0 SSMI15 -19.1  -49.1  -19.1  -49.1  -19.4  -49.6 Analysis Plot     
     20200215 004948 -930.0      N/A   N/A     N/A    0.00  35.0    GMI -19.3  -48.7  -19.3  -48.7  -20.0  -49.6 Analysis Plot     
     20200215 010712  -17.0      N/A  52.1%  66.66   16.96  35.0 SSMI15 -19.3  -48.8  -19.3  -48.8  -19.6  -49.1 Analysis Plot     
     20200215 014755  -18.9      N/A  37.0%  77.77   18.94  35.0 SSMI16 -19.3  -48.7  -19.3  -48.7  -19.7  -48.9 Analysis Plot     
     20200215 135404   -2.9      N/A  21.9%  66.66    2.92  35.0 SSMI15 -19.4  -48.0  -19.4  -48.0  -19.5  -48.6 Analysis Plot     
     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

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.