Tropical Depression 13L

Passive Microwave (PMW) Intensity Information
Hurricane Intensity Estimation (HIE) Algorithm
Version 8.1.5
 

         Overpass     Inten           Ring    Ring          Wind           Forecast        Final        Target  
       Date    Time   Score  Meaning   Pct    Diam  BTdiff   Est   Sat    Lat    Lon    Lat    Lon    Lat    Lon              
     20131021 114600   -3.9      N/A  23.3% 199.98    3.91  30.0 SSMI18  27.7   55.4   27.7   55.4   27.9   55.9 Analysis Plot     
     20131021 204200   -2.7      N/A  13.7% 177.76    2.66  35.0 SSMI16  28.8   55.0   28.8   55.0   28.8   54.6 Analysis Plot     
     20131021 230500   -4.3      N/A  16.4% 177.76    4.35  35.0 SSMI18  29.0   54.8   29.0   54.8   28.8   54.3 Analysis Plot     
     20131022 034227   -4.3      N/A  12.3%  88.88    4.27  35.0   TRMM  29.3   53.7   29.3   53.7   29.1   53.3 Analysis Plot     
     20131022 071607    N/A      N/A   N/A     N/A     N/A  35.0 SSMI15  29.5   53.2   29.5   53.2   29.6   52.5 Analysis Plot     
     20131022 182329 -930.0      N/A   N/A   55.55    4.82  45.0 SSMI15  29.6   51.4   29.6   51.4   29.3   51.1 Analysis Plot     
     20131022 202900  -12.0      N/A  58.9%  66.66   12.03  45.0 SSMI16  29.4   51.4   29.4   51.4   29.2   50.8 Analysis Plot     
     20131022 225300    N/A      N/A   N/A     N/A     N/A  45.0 SSMI18  29.4   51.1   29.4   51.1   29.2   50.0 Analysis Plot     
     20131022 225300    N/A      N/A   N/A     N/A     N/A  45.0 SSMI18  29.4   50.8   29.4   50.8   29.2   50.0 Analysis Plot     
     20131022 233129    N/A      N/A   N/A     N/A     N/A  45.0   TRMM  29.4   50.9   29.4   50.9   29.2   49.7 Analysis Plot     
     20131023 024735    N/A      N/A   N/A     N/A     N/A  45.0   TRMM  29.6   50.0   29.6   50.0   29.1   49.4 Analysis Plot     
     20131023 081531   -6.4      N/A  16.4% 188.87    6.42  45.0 SSMI15  29.7   49.6   29.7   49.6   29.1   49.9 Analysis Plot     
     20131023 085700   -8.8      N/A  11.0% 199.98    8.79  45.0 SSMI16  29.6   49.2   29.6   49.2   29.5   49.5 Analysis Plot     
     20131023 100500 -930.0      N/A   N/A   44.44    3.28  45.0 SSMI17  29.6   49.0   29.6   49.0   29.2   49.0 Analysis Plot     
     20131023 112100   -8.6      N/A   9.6% 222.20    8.57  45.0 SSMI18  29.7   48.9   29.7   48.9   29.6   49.0 Analysis Plot     
     20131023 181345   -0.1      N/A   N/A   11.11     .13  40.0 SSMI15  29.6   48.6   29.6   48.6   29.3   48.5 Analysis Plot     
     20131023 201600   -6.0      N/A   N/A  211.09    6.04  40.0 SSMI16  29.3   48.8   29.3   48.8   29.3   48.9 Analysis Plot     
     20131023 224100   -2.4      N/A   N/A  222.20    2.42  40.0 SSMI18  29.3   48.6   29.3   48.6   29.3   48.6 Analysis Plot     
     20131023 224100   -2.4      N/A   N/A  222.20    2.43  40.0 SSMI18  29.4   48.5   29.4   48.5   29.4   48.6 Analysis Plot     
     20131024 015301 -930.0      N/A   N/A   22.22    3.72  30.0   TRMM  29.5   48.3   29.5   48.3   29.3   48.0 Analysis Plot     
     20131024 033028 -930.0      N/A   N/A  222.20    5.03  30.0   TRMM  29.5   48.2   29.5   48.2   29.6   48.3 Analysis Plot     
     20131024 070607   -3.6      N/A   N/A  122.21    3.56  30.0 SSMI15  29.7   47.9   29.7   47.9   29.6   47.7 Analysis Plot     
     20131024 084400   -1.7      N/A   N/A  177.76    1.70  30.0 SSMI16  29.8   47.8   29.8   47.8   30.0   47.9 Analysis Plot     
     20131024 095100   -1.5      N/A   N/A  222.20    1.46  30.0 SSMI17  29.9   47.7   29.9   47.7   30.1   48.0 Analysis Plot     
     20131024 110900   -5.2      N/A   N/A  222.20    5.23  30.0 SSMI18  30.0   47.6   30.0   47.6   30.1   47.7 Analysis Plot     
     20131024 222900   -4.1      N/A   N/A  222.20    4.13  25.0 SSMI18  30.8   47.1   30.8   47.1   30.4   46.8 Analysis Plot     
     20131024 222900   -0.1      N/A   N/A   11.11     .12  25.0 SSMI18  30.9   47.0   30.9   47.0   30.6   46.5 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.