Tropical Storm 21W

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              
     20191016 185218 -930.0      N/A   N/A     N/A    0.00  25.0 SSMI15  18.0 -128.9   18.0 -128.9   18.8 -129.4 Analysis Plot     
     20191016 214652 -930.0      N/A   N/A     N/A    0.00  25.0 SSMI18  18.2 -129.1   18.2 -129.1   18.6 -129.4 Analysis Plot     
     20191017 084641   -5.3      N/A  50.7%  77.77    5.29  30.0 SSMI18  19.3 -129.2   19.3 -129.2   19.2 -130.3 Analysis Plot     
     20191017 185323 -930.0      N/A   N/A     N/A    0.00  35.0 SSMI15  19.6 -129.4   19.6 -129.4   19.3 -129.3 Analysis Plot     
     20191017 220446    N/A      N/A   N/A     N/A     N/A  40.0 SSMI18  20.1 -129.4   20.1 -129.4   19.8 -130.0 Analysis Plot     
     20191018 083403   -1.4      N/A  11.0% 133.32    1.39  45.0 SSMI18  20.1 -129.4   20.1 -129.4   19.6 -129.5 Analysis Plot     
     20191018 094438   -2.2      N/A   6.8%  88.88    2.19  45.0 SSMI16  20.1 -129.3   20.1 -129.3   19.7 -129.4 Analysis Plot     
     20191018 211158  -13.3      N/A  84.9%  33.33   13.31  50.0 SSMI16  21.0 -128.3   21.0 -128.3   20.8 -128.3 Analysis Plot     
     20191018 215201  -30.8      N/A  94.5%  22.22   15.83  50.0 SSMI18  21.0 -128.2   21.0 -128.2   21.0 -128.4 Analysis Plot     
     20191019 044659   19.9      N/A 100.0%  11.11    4.89  55.0  AMSR2  21.4 -127.7   21.4 -127.7   21.4 -127.5 Analysis Plot     
     20191019 074013    4.8      N/A  56.2%  99.99    4.82  65.0 SSMI16  21.7 -127.3   21.7 -127.3   21.6 -127.5 Analysis Plot     
     20191019 090922 -930.0      N/A   N/A     N/A    0.00  65.0 SSMI15  21.6 -127.3   21.6 -127.3   21.8 -127.6 Analysis Plot     
     20191019 165707   45.0  >65 kts 100.0%  11.11   29.99  75.0  AMSR2  22.3 -127.3   22.4 -127.4   22.4 -127.4 Analysis Plot     
     20191019 205850    0.5      N/A  46.6% 222.20     .47  95.0 SSMI16  22.8 -127.6   23.0 -127.7   23.0 -127.7 Analysis Plot     
     20191019 214001    0.3      N/A  24.7% 111.10     .26  95.0 SSMI18  22.9 -127.6   23.3 -127.6   23.3 -127.6 Analysis Plot     
     20191020 082754   16.4      N/A  83.6%  66.66   16.38  80.0 SSMI15  24.5 -129.2   24.8 -129.4   24.8 -129.4 Analysis Plot     
     20191020 173940 -930.0      N/A   N/A     N/A    0.00  65.0  AMSR2  26.7 -130.8   26.7 -130.8   27.5 -131.0 Analysis Plot     
     20191020 194017    2.3      N/A  20.5%  66.66    2.28  60.0 SSMI15  27.6 -132.2   27.6 -132.2   27.8 -132.1 Analysis Plot     
     20191020 204547    4.0      N/A  21.9%  77.77    4.04  60.0 SSMI16  27.7 -132.3   27.7 -132.3   27.9 -132.3 Analysis Plot     
     20191020 212649    9.3      N/A  24.7%  55.55    9.35  60.0 SSMI18  27.9 -132.4   27.9 -132.4   28.1 -132.5 Analysis Plot     
     20191021 043707    N/A      N/A   N/A     N/A     N/A  55.0  AMSR2  29.8 -133.9   29.8 -133.9   29.8 -133.9 Analysis Plot     
     20191021 072854 -930.0      N/A   N/A     N/A    0.00  55.0 SSMI16  30.3 -134.4   30.3 -134.4   30.6 -134.8 Analysis Plot     
     20191021 081615 -930.0      N/A   N/A     N/A    0.00  55.0 SSMI15  30.2 -134.2   30.2 -134.2   30.0 -134.1 Analysis Plot     
     20191021 164122 -930.0      N/A   N/A     N/A    0.00  40.0  AMSR2  32.6 -137.0   32.6 -137.0   32.8 -136.6 Analysis Plot     
     20191022 034236   -3.1      N/A   N/A  155.54    3.14  45.0  AMSR2  33.7 -139.8   33.7 -139.8   33.5 -140.1 Analysis Plot     
     20191022 071453   -0.7      N/A   N/A   88.88     .68  45.0 SSMI16  34.2 -140.6   34.2 -140.6   33.4 -140.3 Analysis Plot     
     20191022 074342   -0.5      N/A   N/A   77.77     .55  45.0 SSMI18  33.6 -140.7   33.6 -140.7   33.5 -140.8 Analysis Plot     
     20191022 154629 -930.0      N/A   N/A     N/A    0.00  45.0  AMSR2  35.7 -143.8   35.7 -143.8   35.7 -143.6 Analysis Plot     
     20191022 201907   -1.2      N/A   N/A   44.44    1.15  45.0 SSMI16  36.4 -144.9   36.4 -144.9   36.7 -144.6 Analysis Plot     
     20191022 210228   -0.7      N/A   N/A  133.32     .70  45.0 SSMI18  36.6 -145.2   36.6 -145.2   36.7 -144.9 Analysis Plot     
     20191023 024855   -2.7      N/A   N/A   11.11    2.72  45.0  AMSR2  37.8 -147.8   37.8 -147.8   38.2 -147.9 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.