Tropical Depression 12W

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              
     20210802 091046   -2.1      N/A   2.7% 255.53    2.12  25.0 SSMI17  23.4 -154.0   23.4 -154.0   23.0 -154.1 Analysis Plot     
     20210802 194803   -2.3      N/A  26.0% 155.54    2.26  30.0 SSMI16  24.9 -152.9   24.9 -152.9   25.0 -153.6 Analysis Plot     
     20210802 211604   -1.4      N/A   8.2% 144.43    1.45  30.0 SSMI17  25.9 -152.7   25.9 -152.7   25.2 -153.6 Analysis Plot     
     20210803 032204   -4.3      N/A   6.8% 266.64    4.25  30.0  AMSR2  27.0 -151.5   27.0 -151.5   27.1 -151.5 Analysis Plot     
     20210803 061013   -6.0      N/A   9.6% 155.54    5.97  25.0 SSMI15  27.6 -150.6   27.6 -150.6   27.4 -150.7 Analysis Plot     
     20210803 202025 -930.0      N/A   N/A     N/A    0.00  25.0 SSMI18  29.0 -148.0   29.0 -148.0   28.7 -147.4 Analysis Plot     
     20210803 224053 -930.0      N/A   N/A     N/A    0.00  25.0 SSMI17  29.2 -147.5   29.2 -147.5   29.1 -146.9 Analysis Plot     
     20210804 222800   -2.1      N/A  16.4%  77.77    2.11  20.0 SSMI17  29.1 -139.1   29.1 -139.1   29.7 -139.1 Analysis Plot     
     20210805 075346 -930.0      N/A   N/A     N/A    0.00  25.0 SSMI18  29.4 -137.7   29.4 -137.7   29.6 -139.0 Analysis Plot     
     20210805 084011   -0.3      N/A   N/A  211.09     .35  25.0 SSMI16  29.4 -137.7   29.4 -137.7   29.5 -138.5 Analysis Plot     
     20210805 101352   -2.4      N/A   N/A   33.33    2.37  25.0 SSMI17  29.5 -137.4   29.5 -137.4   29.3 -138.1 Analysis Plot     
     20210805 165426   -3.8      N/A   N/A   22.22    3.82  25.0  AMSR2  29.7 -136.2   29.7 -136.2   30.4 -136.1 Analysis Plot     
     20210805 201639 -930.0      N/A   N/A     N/A    0.00  25.0 SSMI16  30.4 -136.3   30.4 -136.3   30.5 -136.3 Analysis Plot     
     20210806 035442   -1.6      N/A   1.4% 166.65    1.60  25.0  AMSR2  31.1 -134.4   31.1 -134.4   31.5 -133.7 Analysis Plot     
     20210806 070913   -3.0      N/A   N/A   55.55    3.02  25.0 SSMI15  31.2 -133.8   31.2 -133.8   30.3 -133.8 Analysis Plot     
     20210806 173825 -930.0      N/A   N/A     N/A    0.00  25.0  AMSR2  31.0 -132.5   31.0 -132.5   30.5 -131.9 Analysis Plot     
     20210806 192508 -930.0      N/A   N/A     N/A    0.00  25.0 SSMI15  30.8 -132.3   30.8 -132.3   30.9 -133.6 Analysis Plot     
     20210806 212423    N/A      N/A   N/A     N/A     N/A  25.0 SSMI18  30.7 -132.3   30.7 -132.3   31.3 -132.2 Analysis Plot     
     20210806 215421 -930.0      N/A   N/A     N/A    0.00  25.0 SSMI16  30.7 -132.2   30.7 -132.2   30.8 -132.5 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.