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              
     20220928 102846 -930.0      N/A   N/A     N/A    0.00  30.0 SSMI16  22.5 -132.1   22.5 -132.1   22.1 -132.4 Analysis Plot     
     20220928 111111   -0.4      N/A  46.6% 155.54     .45  30.0 SSMI17  22.6 -132.0   22.6 -132.0   22.5 -132.6 Analysis Plot     
     20220928 172722  -10.3      N/A  49.3%  44.44   10.30  35.0  AMSR2  24.1 -131.5   24.1 -131.7   24.1 -131.7 Analysis Plot     
     20220928 230101   -9.2      N/A  56.2%  77.77    9.23  45.0 SSMI17  24.5 -131.7   24.5 -131.7   24.7 -131.5 Analysis Plot     
     20220929 042327   67.4  >85 kts 100.0%  44.44   52.37  55.0  AMSR2  25.5 -132.2   25.5 -132.2   25.6 -132.1 Analysis Plot     
     20220929 101535   53.4  >65 kts 100.0%  33.33   38.37  70.0 SSMI16  26.2 -132.6   26.2 -132.6   25.9 -132.5 Analysis Plot     
     20220929 105746   63.9  >85 kts 100.0%  44.44   48.89  70.0 SSMI17  26.3 -132.7   26.3 -132.7   26.2 -132.8 Analysis Plot     
     20220929 141711   61.2  >85 kts 100.0%  44.44   46.25  85.0    GMI  27.0 -133.5   27.0 -133.6   27.0 -133.6 Analysis Plot     
     20220929 163107   37.2  >65 kts 100.0%  33.33   22.20  85.0  AMSR2  27.4 -134.0   27.1 -134.1   27.1 -134.1 Analysis Plot     
     20220929 220131    2.0      N/A   6.8%  44.44    2.03  75.0 SSMI16  27.5 -134.8   27.5 -134.8   27.8 -134.5 Analysis Plot     
     20220929 222846    2.0      N/A  43.8%  99.99    2.04  75.0 SSMI17  27.6 -135.0   27.6 -135.0   28.0 -135.2 Analysis Plot     
     20220930 102723   43.7  >65 kts 100.0%  55.55   28.74  60.0 SSMI17  29.5 -138.8   29.5 -138.8   29.5 -139.2 Analysis Plot     
     20220930 222110   21.6  >65 kts  37.0%  66.66   21.65  55.0 SSMI17  31.2 -143.5   31.2 -143.5   31.5 -143.8 Analysis Plot     
     20221001 100803   33.4  >65 kts  93.2%  33.33   18.39  55.0 SSMI17  33.6 -147.5   33.6 -147.5   33.5 -147.5 Analysis Plot     
     20221001 161605    N/A      N/A   N/A     N/A     N/A  60.0  AMSR2  34.8 -149.8   34.8 -149.8   35.1 -149.4 Analysis Plot     
     20221001 190856 -930.0      N/A   N/A     N/A    0.00  60.0 SSMI18  35.0 -150.3   35.0 -150.3   34.7 -151.3 Analysis Plot     
     20221001 222129    3.7      N/A  30.1% 144.43    3.72  60.0 SSMI17  35.8 -151.1   35.8 -151.1   36.3 -152.0 Analysis Plot     
     20221002 031844    N/A      N/A   N/A     N/A     N/A  55.0  AMSR2  36.5 -153.2   36.5 -153.2   36.5 -153.2 Analysis Plot     
     20221002 061219    6.1      N/A   N/A  155.54    6.12  55.0 SSMI16  36.7 -153.8   36.7 -153.8   37.1 -154.8 Analysis Plot     
     20221002 065152 -930.0      N/A   N/A     N/A    0.00  55.0 SSMI18  36.7 -153.9   36.7 -153.9   36.7 -155.3 Analysis Plot     
     20221002 095316 -930.0      N/A   N/A     N/A    0.00  55.0 SSMI17  36.9 -154.7   36.9 -154.7   37.0 -155.0 Analysis Plot     
     20221002 114025    6.5      N/A  19.2% 177.76    6.52  55.0    GMI  37.1 -155.3   37.1 -155.3   37.4 -156.4 Analysis Plot     
     20221002 151956    2.2      N/A   N/A   11.11    2.23  55.0  AMSR2  37.3 -156.3   37.3 -156.3   37.5 -157.2 Analysis Plot     
     20221002 185632 -930.0      N/A   N/A     N/A    0.00  55.0 SSMI18  37.3 -156.7   37.3 -156.7   37.1 -157.3 Analysis Plot     
     20221002 194547 -930.0      N/A   N/A     N/A    0.00  55.0 SSMI16  37.3 -156.8   37.3 -156.8   37.9 -156.5 Analysis Plot     
     20221002 220817    3.8      N/A   N/A  255.53    3.84  55.0 SSMI17  37.3 -157.1   37.3 -157.1   37.3 -157.7 Analysis Plot     
     20221003 024057 -930.0      N/A   N/A     N/A    0.00  60.0    GMI  37.0 -157.1   37.0 -157.1   37.8 -156.5 Analysis Plot     
     20221003 052302 -930.0      N/A   N/A     N/A    0.00  60.0 SSMI18  37.1 -157.4   37.1 -157.4   37.0 -159.0 Analysis Plot     
     20221003 055909    0.4      N/A   N/A  111.10     .42  60.0 SSMI16  37.2 -157.5   37.2 -157.5   37.2 -157.1 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.