Tropical Depression 13W

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              
     20190826 173632 -930.0      N/A   N/A     N/A    0.00  25.0  AMSR2  14.2 -127.5   14.2 -127.5   14.8 -128.0 Analysis Plot     
     20190826 184723   -6.8      N/A   1.4%  77.77    6.80  25.0 SSMI15  14.2 -127.6   14.2 -127.6   14.6 -127.5 Analysis Plot     
     20190826 210317   -1.1      N/A   N/A   33.33    1.07  25.0 SSMI16  14.3 -127.4   14.3 -127.4   14.9 -127.5 Analysis Plot     
     20190826 225139 -930.0      N/A   N/A     N/A    0.00  25.0    GMI  14.6 -126.8   14.6 -126.8   15.1 -127.7 Analysis Plot     
     20190826 235110 -930.0      N/A   N/A     N/A    0.00  25.0 SSMI17  14.6 -126.8   14.6 -126.8   15.3 -127.1 Analysis Plot     
     20190827 073703 -930.0      N/A   N/A     N/A    0.00  30.0 SSMI16  15.3 -124.7   15.3 -124.7   15.3 -124.7 Analysis Plot     
     20190827 093111 -930.0      N/A   N/A     N/A    0.00  30.0 SSMI18  15.4 -124.2   15.4 -124.2   15.7 -124.2 Analysis Plot     
     20190827 120056   -0.1      N/A   8.2%  22.22     .14  30.0 SSMI17  15.7 -123.5   15.7 -123.5   16.0 -123.4 Analysis Plot     
     20190827 205044 -930.0      N/A   N/A     N/A    0.00  35.0 SSMI16  16.5 -120.7   16.5 -120.7   15.9 -120.7 Analysis Plot     
     20190827 223951 -930.0      N/A   N/A     N/A    0.00  35.0 SSMI18  16.6 -120.2   16.6 -120.2   17.1 -120.8 Analysis Plot     
     20190827 231019   -0.5      N/A   N/A   33.33     .45  35.0 SSMI17  16.7 -119.9   16.7 -119.9   16.2 -120.7 Analysis Plot     
     20190828 085142   -1.4      N/A  13.7% 211.09    1.40  35.0 SSMI16  17.1 -115.0   17.1 -115.0   17.8 -114.4 Analysis Plot     
     20190828 205359   -4.2      N/A  15.1%  33.33    4.20  35.0 SSMI15  17.4 -112.6   17.4 -112.6   17.1 -112.4 Analysis Plot     
     20190828 222730 -930.0      N/A   N/A     N/A    0.00  35.0 SSMI18  17.4 -112.3   17.4 -112.3   17.3 -112.3 Analysis Plot     
     20190829 084841   -0.1      N/A  14.1% 244.42     .10  35.0 SSMI16  17.7 -109.2   17.7 -109.2   17.9 -108.1 Analysis Plot     
     20190829 104636 -930.0      N/A   N/A     N/A    0.00  35.0 SSMI18  17.7 -108.7   17.7 -108.7   18.6 -109.3 Analysis Plot     
     20190829 114343 -930.0      N/A   N/A     N/A    0.00  35.0 SSMI17  17.7 -108.4   17.7 -108.4   18.0 -109.1 Analysis Plot     
     20190829 235631 -930.0      N/A   N/A     N/A    0.00  30.0 SSMI18  17.4 -105.4   17.4 -105.4   16.8 -104.0 Analysis Plot     
     20190830 005307 -930.0      N/A   N/A     N/A    0.00  30.0 SSMI17  17.4 -105.2   17.4 -105.2   18.0 -104.5 Analysis Plot     
     20190830 063715    N/A      N/A   N/A     N/A     N/A  30.0  AMSR2  17.4 -104.1   17.4 -104.1   17.4 -104.1 Analysis Plot     
     20190830 102436   -0.1      N/A   N/A  166.65     .13  30.0 SSMI18  17.4 -103.5   17.4 -103.5   17.1 -103.1 Analysis Plot     
     20190830 112048 -930.0      N/A   N/A     N/A    0.00  30.0 SSMI17  17.5 -103.4   17.5 -103.4   17.2 -103.3 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.