Tropical Depression 20E

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              
     20191115 105543   -2.5      N/A   N/A   55.55    2.45  30.0 SSMI15  13.7  108.7   13.7  108.7   13.3  108.5 Analysis Plot     
     20191115 205558    N/A      N/A   N/A     N/A     N/A  45.0  AMSR2  14.6  109.3   14.6  109.3   14.6  109.3 Analysis Plot     
     20191115 234021   -2.8      N/A  11.0% 155.54    2.77  45.0 SSMI16  14.9  109.5   14.9  109.5   14.9  109.8 Analysis Plot     
     20191116 002439 -930.0      N/A   N/A     N/A    0.00  45.0 SSMI18  15.0  109.6   15.0  109.6   14.8  110.4 Analysis Plot     
     20191116 020711   -1.9      N/A  13.7% 199.98    1.88  45.0 SSMI18  15.1  109.7   15.1  109.7   15.0  109.9 Analysis Plot     
     20191116 090901   -3.9      N/A  27.4% 122.21    3.86  45.0  AMSR2  15.8  110.6   15.8  110.6   15.6  110.8 Analysis Plot     
     20191116 104652 -930.0      N/A   N/A     N/A    0.00  45.0 SSMI15  15.9  110.7   15.9  110.7   14.7  110.0 Analysis Plot     
     20191116 141004 -930.0      N/A   N/A     N/A    0.00  45.0 SSMI18  16.3  110.8   16.3  110.8   16.6  111.4 Analysis Plot     
     20191117 010649   -2.0      N/A   5.5% 222.20    2.02  40.0 SSMI16  17.0  111.8   17.0  111.8   17.0  111.8 Analysis Plot     
     20191117 015707   -2.0      N/A   N/A  166.65    2.00  40.0 SSMI18  17.1  111.8   17.1  111.8   17.1  111.9 Analysis Plot     
     20191117 131026   -1.2      N/A   N/A  222.20    1.24  30.0 SSMI16  18.2  111.4   18.2  111.4   18.4  111.3 Analysis Plot     
     20191117 135814    N/A      N/A   N/A     N/A     N/A  30.0 SSMI18  18.4  111.3   18.4  111.3   18.4  111.2 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.