Tropical Depression 07L

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              
     20180903 133146   -0.6      N/A  24.7%  77.77     .60  30.0 SSMI18  25.0   80.6   25.0   80.6   24.6   80.6 Analysis Plot     
     20180903 181802   -2.7      N/A  16.4%  22.22    2.75  40.0  AMSR2  25.6   81.9   25.6   81.9   26.0   81.9 Analysis Plot     
     20180903 211214   -0.4      N/A   5.5% 122.21     .38  45.0 SSMI16  26.1   82.4   26.1   82.4   26.2   82.3 Analysis Plot     
     20180903 215031   -2.0      N/A  17.8%  77.77    1.99  45.0    GMI  26.3   82.8   26.3   82.8   26.4   83.0 Analysis Plot     
     20180904 000901   -3.0      N/A   N/A   66.66    2.97  45.0 SSMI17  26.5   83.2   26.5   83.2   26.4   83.7 Analysis Plot     
     20180904 005403   -2.1      N/A   N/A   77.77    2.08  45.0 SSMI18  26.6   83.3   26.6   83.3   26.4   83.6 Analysis Plot     
     20180904 014749   -2.2      N/A   4.1%  55.55    2.21  50.0 SSMI17  26.8   83.6   26.8   83.6   26.6   83.7 Analysis Plot     
     20180904 073607   -2.4      N/A  31.5%  22.22    2.39  50.0    GMI  27.5   85.4   27.5   85.4   27.8   85.2 Analysis Plot     
     20180904 084529    N/A      N/A   N/A     N/A     N/A  55.0 SSMI15  27.7   85.7   27.7   85.7   27.9   85.6 Analysis Plot     
     20180904 105423    N/A      N/A   N/A     N/A     N/A  55.0 SSMI16  27.9   85.9   27.9   85.9   27.8   85.3 Analysis Plot     
     20180904 131925    3.4      N/A   9.6% 222.20    3.37  55.0 SSMI18  28.1   86.3   28.1   86.3   28.0   86.9 Analysis Plot     
     20180904 135801    3.5      N/A   8.2% 222.20    3.49  55.0 SSMI17  28.2   86.4   28.2   86.4   28.0   87.0 Analysis Plot     
     20180904 223004    1.4      N/A  28.1% 211.09    1.40  55.0 SSMI16  29.5   87.9   29.5   87.9   29.0   87.2 Analysis Plot     
     20180904 235529 -930.0      N/A   N/A     N/A    0.00  55.0 SSMI17  29.7   88.2   29.7   88.2   28.9   88.4 Analysis Plot     
     20180905 005239    1.7      N/A   1.4%  66.66    1.65  55.0 SSMI18  29.9   88.3   29.9   88.3   29.6   87.6 Analysis Plot     
     20180905 013327    2.3      N/A  11.0% 133.32    2.33  60.0 SSMI17  29.8   88.0   29.8   88.0   29.7   87.5 Analysis Plot     
     20180905 135516   -0.7      N/A  11.1% 222.20     .67  30.0 SSMI17  32.1   89.9   32.1   89.9   32.0   89.0 Analysis Plot     
     20180905 214139 -930.0      N/A   N/A     N/A    0.00  25.0    GMI  32.9   90.8   32.9   90.8   33.1   90.2 Analysis Plot     
     20180906 002939 -930.0      N/A   N/A     N/A    0.00  25.0 SSMI18  33.0   90.9   33.0   90.9   33.0   91.1 Analysis Plot     
     20180906 072417   -0.6      N/A   5.9% 222.20     .58  25.0    GMI  33.7   91.3   33.7   91.3   33.6   91.8 Analysis Plot     
     20180906 074853   -1.7      N/A   8.2% 211.09    1.74  20.0  AMSR2  33.7   91.2   33.7   91.2   33.5   91.7 Analysis Plot     
     20180906 101452    N/A      N/A   N/A     N/A     N/A  20.0 SSMI15  33.7   91.5   33.7   91.5   33.7   92.2 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.