Tropical Depression 08B


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              
     20181215 103147    N/A      N/A   N/A     N/A     N/A  35.0 SSMI15   9.9  -85.1    9.9  -85.1    9.7  -85.7 Analysis Plot     
     20181215 105152   -2.5      N/A   N/A  166.65    2.51  35.0 SSMI16  10.0  -85.0   10.0  -85.0   10.4  -85.9 Analysis Plot     
     20181215 121932   -0.8      N/A   2.7% 188.87     .81  35.0 SSMI18  10.2  -84.9   10.2  -84.9    9.6  -84.9 Analysis Plot     
     20181215 132034 -930.0      N/A   N/A     N/A    0.00  35.0 SSMI17  10.5  -85.1   10.5  -85.1   10.4  -86.0 Analysis Plot     
     20181216 012129   -2.9      N/A   4.1% 188.87    2.88  40.0 SSMI18  11.5  -84.2   11.5  -84.2   11.9  -84.7 Analysis Plot     
     20181216 022811   -3.8      N/A  11.0% 222.20    3.81  45.0 SSMI17  11.2  -84.4   11.2  -84.4   11.6  -84.5 Analysis Plot     
     20181216 033954   -2.2      N/A  12.3% 188.87    2.23  45.0    GMI  11.5  -84.3   11.5  -84.3   12.0  -84.3 Analysis Plot     
     20181216 103329   -1.5      N/A   1.4% 166.65    1.49  50.0 SSMI16  12.7  -83.9   12.7  -83.9   13.3  -83.4 Analysis Plot     
     20181216 120054   -0.6      N/A   N/A   55.55     .62  50.0 SSMI18  13.0  -83.8   13.0  -83.8   13.3  -82.9 Analysis Plot     
     20181216 130701    5.4      N/A  19.2%  66.66    5.39  55.0 SSMI17  13.4  -83.1   13.4  -83.1   13.5  -82.8 Analysis Plot     
     20181216 150719   28.9  >65 kts  89.0%  44.44   13.90  55.0    GMI  13.8  -83.0   13.8  -83.0   13.8  -82.3 Analysis Plot     
     20181216 194614    2.3      N/A   N/A   11.11    2.28  55.0  AMSR2  14.4  -82.2   14.4  -82.2   14.8  -82.3 Analysis Plot     
     20181216 222548    N/A      N/A   N/A     N/A     N/A  55.0 SSMI15  14.9  -82.1   14.9  -82.1   15.4  -82.7 Analysis Plot     
     20181216 234920    0.8      N/A  31.5% 166.65     .78  55.0 SSMI16  15.0  -82.0   15.0  -82.0   15.4  -82.8 Analysis Plot     
     20181217 010750    2.1      N/A  57.5%  22.22    2.09  55.0 SSMI18  15.2  -82.0   15.2  -82.0   15.7  -82.1 Analysis Plot     
     20181217 021451  -16.3      N/A 100.0%  11.11    1.32  45.0 SSMI17  15.5  -82.4   15.5  -82.4   15.8  -81.7 Analysis Plot     
     20181217 081549   -1.3      N/A   N/A   11.11    1.32  45.0  AMSR2  16.4  -82.3   16.4  -82.3   16.1  -82.5 Analysis Plot     
     20181217 101226   -5.6      N/A   N/A  133.32    5.56  45.0 SSMI15  16.5  -82.3   16.5  -82.3   15.7  -82.6 Analysis Plot     
     20181217 101429   -1.1      N/A   N/A   44.44    1.07  45.0 SSMI16  16.7  -82.3   16.7  -82.3   16.4  -82.2 Analysis Plot     
     20181217 125338   -1.5      N/A   N/A   77.77    1.53  45.0 SSMI17  17.0  -82.3   17.0  -82.3   16.7  -82.4 Analysis Plot     
     20181217 141344 -930.0      N/A   N/A     N/A    0.00  30.0    GMI  17.6  -82.4   17.6  -82.4   17.1  -82.5 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.