Tropical Depression 20W

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              
     20180812 175231    N/A      N/A   N/A     N/A     N/A  25.0  AMSR2  20.6 -112.5   20.6 -112.5   20.4 -112.5 Analysis Plot     
     20180812 201752    N/A      N/A   N/A     N/A     N/A  25.0 SSMI15  20.6 -112.6   20.6 -112.6   20.6 -112.3 Analysis Plot     
     20180812 235905    N/A      N/A   N/A     N/A     N/A  25.0 SSMI17  20.6 -112.7   20.6 -112.7   20.3 -112.2 Analysis Plot     
     20180813 183536 -930.0      N/A   N/A     N/A    0.00  40.0  AMSR2  20.5 -113.4   20.5 -113.4   20.0 -114.7 Analysis Plot     
     20180813 195746   -4.2      N/A  20.5% 144.43    4.17  40.0 SSMI15  20.6 -113.4   20.6 -113.4   20.9 -113.0 Analysis Plot     
     20180813 234513 -930.0      N/A   N/A     N/A    0.00  40.0 SSMI17  20.6 -113.4   20.6 -113.4   20.5 -113.3 Analysis Plot     
     20180814 005316   -2.2      N/A   9.6%  77.77    2.20  40.0    GMI  20.7 -113.5   20.7 -113.5   21.0 -113.2 Analysis Plot     
     20180814 052944   -2.7      N/A  52.1%  66.66    2.75  40.0  AMSR2  21.2 -113.8   21.2 -113.8   20.9 -113.3 Analysis Plot     
     20180814 085446 -930.0      N/A   N/A     N/A    0.00  40.0 SSMI16  21.1 -113.6   21.1 -113.6   21.2 -113.2 Analysis Plot     
     20180814 104332   -1.0      N/A   2.7% 266.64    1.03  40.0 SSMI18  21.1 -113.6   21.1 -113.6   21.2 -113.7 Analysis Plot     
     20180814 141207    N/A      N/A   N/A     N/A     N/A  35.0    GMI  21.0 -113.3   21.0 -113.3   20.6 -113.1 Analysis Plot     
     20180814 220423    N/A      N/A   N/A     N/A     N/A  35.0 SSMI16  21.0 -112.8   21.0 -112.8   20.8 -112.1 Analysis Plot     
     20180815 000227   -2.3      N/A  17.8% 111.10    2.34  35.0 SSMI18  21.0 -112.6   21.0 -112.6   20.7 -111.8 Analysis Plot     
     20180815 061252   -7.7      N/A  32.9%  44.44    7.73  35.0  AMSR2  20.8 -111.8   20.8 -111.8   21.0 -111.4 Analysis Plot     
     20180815 182239   -3.2      N/A  32.9%  33.33    3.19  35.0  AMSR2  20.8 -110.2   20.8 -110.2   20.7 -109.4 Analysis Plot     
     20180815 220940  -17.7      N/A  23.3%  66.66   17.72  35.0 SSMI16  20.4 -109.4   20.4 -109.4   20.7 -109.0 Analysis Plot     
     20180815 235042  -21.7      N/A  41.1%  55.55   21.66  35.0 SSMI18  20.2 -109.1   20.2 -109.1   20.5 -108.7 Analysis Plot     
     20180816 005806  -19.6      N/A  42.5%  66.66   19.65  35.0 SSMI17  20.1 -109.0   20.1 -109.0   20.4 -108.4 Analysis Plot     
     20180816 084035 -930.0      N/A   N/A     N/A    0.00  55.0 SSMI15  20.0 -107.4   20.0 -107.4   20.5 -107.5 Analysis Plot     
     20180816 102827   36.5  >65 kts 100.0%  33.33   21.54  55.0 SSMI18  20.0 -107.2   20.0 -107.2   19.8 -107.5 Analysis Plot     
     20180816 113636    2.1      N/A  27.4% 188.87    2.12  55.0 SSMI17  20.0 -107.0   20.0 -107.0   20.2 -106.7 Analysis Plot     
     20180816 140158    N/A      N/A   N/A     N/A     N/A  60.0    GMI  19.9 -107.0   19.9 -107.0   19.8 -106.8 Analysis Plot     
     20180816 214534 -930.0      N/A   N/A     N/A    0.00  55.0 SSMI16  19.8 -106.3   19.8 -106.3   19.7 -106.9 Analysis Plot     
     20180816 233818    0.4      N/A  45.2%  44.44     .39  55.0 SSMI18  19.8 -106.1   19.8 -106.1   19.5 -105.4 Analysis Plot     
     20180817 004811 -930.0      N/A   N/A     N/A    0.00  55.0 SSMI17  19.8 -106.0   19.8 -106.0   19.3 -106.5 Analysis Plot     
     20180817 060031   -1.0      N/A   N/A   44.44    1.00  50.0  AMSR2  19.2 -104.6   19.2 -104.6   19.4 -103.4 Analysis Plot     
     20180817 085400    N/A      N/A   N/A     N/A     N/A  50.0 SSMI15  19.2 -104.4   19.2 -104.4   18.6 -104.5 Analysis Plot     
     20180817 111330 -930.0      N/A   N/A     N/A    0.00  50.0 SSMI17  19.1 -104.0   19.1 -104.0   18.5 -104.1 Analysis Plot     
     20180817 205941   -0.8      N/A   N/A   44.44     .80  50.0 SSMI15  19.1 -102.4   19.1 -102.4   19.2 -102.2 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.