Tropical Depression 08E

Passive Microwave (PMW) Intensity Information
Hurricane Intensity Estimation (HIE) Algorithm
Version 8.2.1
 

         Overpass     Inten           Ring    Ring          Wind           Forecast        Final        Target  
       Date    Time   Score  Meaning   Pct    Diam  BTdiff   Est   Sat    Lat    Lon    Lat    Lon    Lat    Lon              
     20170718 210702   -4.9      N/A   N/A  222.20    4.86  30.0  AMSR2  14.9  119.4   14.9  119.4   14.9  119.6 Analysis Plot     
     20170719 001845   -2.7      N/A  21.9%  77.77    2.70  30.0    GMI  14.9  119.7   14.9  119.7   14.3  120.1 Analysis Plot     
     20170719 021900   -0.1      N/A   9.6% 222.20     .15  30.0 SSMI18  14.9  119.8   14.9  119.8   14.9  120.2 Analysis Plot     
     20170719 021900   -0.0      N/A   9.6% 222.20     .03  30.0 SSMI18  14.8  119.9   14.8  119.9   14.9  120.2 Analysis Plot     
     20170719 092059  -33.2      N/A  97.3%  22.22   18.17  30.0  AMSR2  14.6  120.9   14.6  120.9   14.2  121.7 Analysis Plot     
     20170719 122400   -2.4      N/A   6.8% 144.43    2.39  30.0 SSMI16  14.5  121.0   14.5  121.0   15.1  121.4 Analysis Plot     
     20170719 145600 -930.0      N/A   N/A     N/A    0.00  30.0 SSMI18  14.5  121.1   14.5  121.1   15.3  121.5 Analysis Plot     
     20170720 020700   -2.1      N/A   N/A   33.33    2.09  25.0 SSMI18  14.0  122.1   14.0  122.1   14.1  121.5 Analysis Plot     
     20170720 105305   -4.4      N/A   8.2%  55.55    4.36  25.0    GMI  13.6  122.7   13.6  122.7   13.3  123.3 Analysis Plot     
     20170720 144400   -5.6      N/A   2.7% 188.87    5.58  25.0 SSMI18  13.4  123.1   13.4  123.1   13.7  123.2 Analysis Plot     
     20180726 212520    N/A      N/A   N/A     N/A     N/A  30.0  AMSR2  13.2  123.4   13.2  123.4   13.3  124.2 Analysis Plot     
     20180727 021600 -930.0      N/A   N/A     N/A    0.00  30.0 SSMI18  13.8  125.1   13.8  125.1   13.6  123.9 Analysis Plot     
     20180727 110720 -930.0      N/A   N/A     N/A    0.00  30.0    GMI  14.5  127.2   14.5  127.2   14.7  127.7 Analysis Plot     
     20180727 223413   -4.2      N/A  19.2%  33.33    4.19  30.0    GMI  14.7  130.2   14.7  130.2   14.6  130.1 Analysis Plot     
     20180728 032900   -3.1      N/A  21.9% 177.76    3.07  30.0 SSMI17  15.0  131.2   15.0  131.2   14.9  131.6 Analysis Plot     
     20180728 032900   -2.9      N/A  20.5% 177.76    2.88  30.0 SSMI17  15.0  131.5   15.0  131.5   14.9  131.6 Analysis Plot     
     20180728 114903 -930.0      N/A   N/A     N/A    0.00  30.0    GMI  15.2  132.9   15.2  132.9   15.8  133.0 Analysis Plot     
     20180728 160500   -1.7      N/A  23.5% 222.20    1.70  30.0 SSMI17  15.3  133.2   15.3  133.2   15.7  133.4 Analysis Plot     
     20180728 232703   -0.2      N/A   N/A   11.11     .19  30.0 SSMI15  15.7  134.5   15.7  134.5   15.1  134.1 Analysis Plot     
     20180729 031600    N/A      N/A   N/A     N/A     N/A  30.0 SSMI17  16.1  135.6   16.1  135.6   17.0  135.3 Analysis Plot     
     20180729 031600    N/A      N/A   N/A     N/A     N/A  30.0 SSMI17  16.1  135.9   16.1  135.9   17.0  135.4 Analysis Plot     
     20180729 110509   -0.8      N/A   N/A   22.22     .81  30.0  AMSR2  16.2  137.5   16.2  137.5   16.1  137.7 Analysis Plot     
     20180729 155100   -0.3      N/A   N/A   22.22     .30  30.0 SSMI17  15.9  138.7   15.9  138.7   16.3  138.7 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.