Tropical Storm 31Y_04

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              
     20200831 075838 -930.0      N/A   N/A     N/A    0.00  30.0 SSMI16  23.6 -146.5   23.6 -146.5   22.9 -145.8 Analysis Plot     
     20200831 092059   -0.9      N/A   9.6% 177.76     .89  30.0 SSMI18  23.7 -146.5   23.7 -146.5   23.5 -145.7 Analysis Plot     
     20200831 162612   -1.7      N/A  43.8%  22.22    1.73  30.0  AMSR2  22.4 -145.4   22.4 -145.4   21.6 -145.7 Analysis Plot     
     20200831 194454   -1.0      N/A  32.9% 266.64     .97  30.0 SSMI16  22.2 -145.1   22.2 -145.1   22.2 -145.2 Analysis Plot     
     20200831 204807   -1.2      N/A   4.1% 233.31    1.16  30.0 SSMI18  22.2 -144.9   22.2 -144.9   22.3 -145.3 Analysis Plot     
     20200901 032127 -930.0      N/A   N/A     N/A    0.00  30.0  AMSR2  21.3 -144.8   21.3 -144.8   21.2 -145.3 Analysis Plot     
     20200901 085820 -930.0      N/A   N/A     N/A    0.00  30.0 SSMI18  20.8 -143.9   20.8 -143.9   21.3 -144.0 Analysis Plot     
     20200901 193146 -930.0      N/A   N/A     N/A    0.00  40.0 SSMI16  20.1 -143.2   20.1 -143.2   19.7 -142.8 Analysis Plot     
     20200901 203539   -2.3      N/A  41.1% 166.65    2.29  45.0 SSMI18  19.7 -142.9   19.7 -142.9   19.5 -142.5 Analysis Plot     
     20200902 082131    N/A      N/A   N/A     N/A     N/A  50.0 SSMI18  19.3 -141.0   19.1 -141.2   19.1 -141.2 Analysis Plot     
     20200902 161444    7.9      N/A  49.3%  22.22    7.92  55.0  AMSR2  19.4 -139.6   20.0 -139.5   20.0 -139.5 Analysis Plot     
     20200902 202311   39.1  >65 kts 100.0%  44.44   24.11  65.0 SSMI18  20.1 -139.0   20.1 -139.2   20.1 -139.2 Analysis Plot     
     20200903 091116   41.8  >65 kts 100.0% 133.32   26.82  75.0 SSMI16  20.6 -137.1   20.6 -137.4   20.6 -137.4 Analysis Plot     
     20200903 203820   78.5  >85 kts 100.0%  77.77   63.51  85.0 SSMI16  21.0 -135.4   21.4 -135.8   21.4 -135.8 Analysis Plot     
     20200904 035326   60.0  >85 kts 100.0%  66.66   45.01 100.0  AMSR2  22.0 -134.5   22.1 -134.6   22.1 -134.6 Analysis Plot     
     20200904 085821   54.9  >65 kts 100.0%  66.66   39.92 100.0 SSMI16  22.1 -133.9   22.2 -134.3   22.2 -134.3 Analysis Plot     
     20200904 100139   51.0  >65 kts 100.0%  66.66   36.01 100.0 SSMI18  22.1 -133.8   22.3 -133.9   22.3 -133.9 Analysis Plot     
     20200904 202439   56.3  >65 kts 100.0%  55.55   41.26 100.0 SSMI16  23.1 -132.4   23.5 -132.5   23.5 -132.5 Analysis Plot     
     20200904 213918   64.8  >85 kts 100.0%  55.55   49.79 100.0 SSMI18  23.1 -132.4   23.5 -132.3   23.5 -132.3 Analysis Plot     
     20200905 084714   56.8  >65 kts 100.0%  44.44   41.76 100.0 SSMI16  24.6 -131.4   24.7 -131.4   24.7 -131.4 Analysis Plot     
     20200905 094856   55.4  >65 kts 100.0%  44.44   40.43 100.0 SSMI18  24.8 -131.4   24.8 -131.3   24.8 -131.3 Analysis Plot     
     20200905 164424   14.7      N/A  41.1%  55.55   14.72 100.0  AMSR2  26.1 -130.4   26.1 -130.9   26.1 -130.9 Analysis Plot     
     20200905 212543   51.9  >65 kts 100.0% 155.54   36.90 100.0 SSMI18  26.5 -130.6   27.0 -130.7   27.0 -130.7 Analysis Plot     
     20200906 093618   56.0  >65 kts 100.0%  88.88   41.03  85.0 SSMI18  30.2 -129.7   29.7 -129.9   29.7 -129.9 Analysis Plot     
     20200906 172506   13.3      N/A  30.1%  33.33   13.31  85.0  AMSR2  32.5 -129.0   32.8 -129.1   32.8 -129.1 Analysis Plot     
     20200906 214915 -930.0      N/A   N/A     N/A    0.00  85.0 SSMI16  33.7 -129.2   34.3 -130.1   34.3 -130.1 Analysis Plot     
     20200907 042708 -930.0      N/A   N/A     N/A    0.00  75.0  AMSR2  36.6 -129.2   36.6 -129.2   36.7 -128.7 Analysis Plot     
     20200907 074214 -930.0      N/A   N/A     N/A    0.00  65.0 SSMI18  38.5 -129.3   38.5 -129.3   37.9 -128.2 Analysis Plot     
     20200907 090159 -930.0      N/A   N/A     N/A    0.00  65.0    GMI  39.3 -129.3   39.3 -129.3   39.2 -129.2 Analysis Plot     
     20200907 180619 -930.0      N/A   N/A     N/A    0.00  55.0  AMSR2  42.3 -128.2   42.3 -128.2   41.8 -128.6 Analysis Plot     
     20200907 201110 -930.0      N/A   N/A     N/A    0.00  55.0 SSMI15  42.8 -128.2   42.8 -128.2   42.9 -128.4 Analysis Plot     
     20200907 212735    0.5      N/A   N/A   77.77     .55  55.0 SSMI16  43.0 -128.3   43.0 -128.3   43.1 -128.7 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.