Tropical Storm 25W

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              
     20211024 111755 -930.0      N/A   N/A     N/A    0.00  30.0 SSMI17  13.2 -139.0   13.2 -139.0   13.8 -137.9 Analysis Plot     
     20211024 194730   -1.2      N/A   N/A   66.66    1.20  30.0 SSMI18  14.5 -139.4   14.5 -139.4   14.3 -139.0 Analysis Plot     
     20211024 224558   -2.1      N/A   6.8% 188.87    2.12  35.0 SSMI17  15.3 -138.8   15.3 -138.8   16.1 -138.4 Analysis Plot     
     20211025 035112   -5.2      N/A   5.5%  22.22    5.17  35.0  AMSR2  16.6 -138.1   16.6 -138.1   16.9 -137.7 Analysis Plot     
     20211025 110424   -0.9      N/A  15.1% 166.65     .89  40.0 SSMI17  18.7 -138.4   18.7 -138.4   18.4 -139.4 Analysis Plot     
     20211025 160323 -930.0      N/A   N/A     N/A    0.00  40.0  AMSR2  19.4 -138.6   19.4 -138.6   19.2 -137.7 Analysis Plot     
     20211025 224053   -1.0      N/A   N/A   33.33    1.02  40.0 SSMI17  19.8 -138.1   19.8 -138.1   19.2 -138.3 Analysis Plot     
     20211026 043538    N/A      N/A   N/A     N/A     N/A  50.0  AMSR2  20.0 -138.4   20.0 -138.4   20.5 -138.6 Analysis Plot     
     20211026 093344   -3.7      N/A   8.2%  22.22    3.68  50.0 SSMI16  19.7 -138.8   19.7 -138.8   19.3 -139.4 Analysis Plot     
     20211026 105059    N/A      N/A   N/A     N/A     N/A  50.0 SSMI17  19.9 -138.8   19.9 -138.8   20.3 -139.4 Analysis Plot     
     20211026 170354    2.3      N/A  24.7% 111.10    2.31  55.0    GMI  20.6 -139.1   20.7 -139.3   20.7 -139.3 Analysis Plot     
     20211026 210539 -930.0      N/A   N/A     N/A    0.00  55.0 SSMI16  20.9 -139.4   20.9 -139.6   20.9 -139.6 Analysis Plot     
     20211026 222735   12.8      N/A  11.0%  88.88   12.76  55.0 SSMI17  21.1 -139.4   21.1 -139.4   20.7 -139.1 Analysis Plot     
     20211027 034017    9.6      N/A   6.8% 155.54    9.63  65.0  AMSR2  21.0 -139.4   21.0 -139.3   21.0 -139.3 Analysis Plot     
     20211027 062245    8.4      N/A  38.4% 111.10    8.36  65.0    GMI  21.4 -139.5   21.5 -139.6   21.5 -139.6 Analysis Plot     
     20211027 073313   16.8      N/A   N/A  133.32   16.83  65.0 SSMI16  21.4 -139.5   21.4 -139.6   21.4 -139.6 Analysis Plot     
     20211027 091243   10.9      N/A  30.1% 122.21   10.93  65.0 SSMI18  21.6 -139.6   21.4 -139.6   21.4 -139.6 Analysis Plot     
     20211027 101348   11.3      N/A  42.5% 144.43   11.29  65.0 SSMI17  21.7 -139.6   21.6 -139.7   21.6 -139.7 Analysis Plot     
     20211027 210021   24.7  >65 kts  58.9% 122.21   24.66  80.0 SSMI16  23.0 -140.2   22.9 -140.2   22.9 -140.2 Analysis Plot     
     20211027 221442   44.1  >65 kts 100.0% 111.10   29.07  80.0 SSMI17  23.2 -140.3   23.2 -140.6   23.2 -140.6 Analysis Plot     
     20211028 072009   14.0      N/A  11.0%  77.77   13.99  80.0 SSMI16  25.0 -141.8   24.9 -141.7   24.9 -141.7 Analysis Plot     
     20211028 085939   16.9      N/A  13.7%  77.77   16.86  85.0 SSMI18  25.3 -141.9   25.0 -141.7   25.0 -141.7 Analysis Plot     
     20211028 095924   15.0      N/A   6.8%  77.77   15.02  85.0 SSMI17  25.6 -142.1   25.3 -142.1   25.3 -142.1 Analysis Plot     
     20211028 163054   22.9  >65 kts  35.6%  99.99   22.89  85.0  AMSR2  27.8 -143.6   27.6 -143.2   27.6 -143.2 Analysis Plot     
     20211028 203658   14.0      N/A  47.9% 111.10   14.04  75.0 SSMI18  28.7 -144.1   28.6 -143.6   28.6 -143.6 Analysis Plot     
     20211028 204715   13.7      N/A  50.7% 111.10   13.73  75.0 SSMI16  28.7 -144.1   28.7 -143.6   28.7 -143.6 Analysis Plot     
     20211028 220132    3.6      N/A  31.5% 111.10    3.58  75.0 SSMI17  29.2 -144.6   28.9 -143.9   28.9 -143.9 Analysis Plot     
     20211029 032953    3.4      N/A   N/A   55.55    3.40  75.0  AMSR2  31.0 -145.8   30.9 -145.8   30.9 -145.8 Analysis Plot     
     20211029 070659 -930.0      N/A   N/A     N/A    0.00  75.0 SSMI16  32.1 -147.1   32.1 -147.1   31.5 -146.2 Analysis Plot     
     20211029 094514 -930.0      N/A   N/A     N/A    0.00  60.0 SSMI17  33.1 -148.3   33.1 -148.3   32.6 -148.6 Analysis Plot     
     20211029 153321    7.5      N/A   N/A  177.76    7.46  60.0  AMSR2  35.8 -152.0   35.8 -152.0   35.8 -152.2 Analysis Plot     
     20211029 203411    2.3      N/A   N/A   88.88    2.27  60.0 SSMI16  37.3 -154.2   37.3 -154.2   37.0 -154.6 Analysis Plot     
     20211029 214834    3.9      N/A   N/A  222.20    3.87  60.0 SSMI17  37.7 -154.9   37.7 -154.9   37.6 -155.5 Analysis Plot     
     20211030 023644 -930.0      N/A   N/A     N/A    0.00  60.0  AMSR2  39.9 -158.2   39.9 -158.2   39.6 -160.6 Analysis Plot     
     20211030 051116    2.5      N/A   N/A  266.64    2.52  60.0 SSMI18  40.8 -159.7   40.8 -159.7   40.8 -159.5 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.