Tropical Depression 25L

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              
     20201002 190533   -4.1      N/A  30.1%  11.11    4.08  30.0  AMSR2  18.4   85.1   18.8   85.5   18.8   85.5 Analysis Plot     
     20201002 223028   -1.6      N/A  17.8% 133.32    1.60  30.0 SSMI18  18.9   85.4   18.9   85.4   18.4   85.6 Analysis Plot     
     20201003 001933   -1.6      N/A  16.4% 144.43    1.62  30.0 SSMI18  19.0   85.5   19.0   85.5   18.5   85.6 Analysis Plot     
     20201003 071705  -14.8      N/A  65.8%  22.22   14.84  40.0  AMSR2  19.3   86.8   19.7   86.4   19.7   86.4 Analysis Plot     
     20201003 094900  -14.7      N/A  38.4%  77.77   14.70  40.0 SSMI15  19.5   87.0   19.7   86.8   19.7   86.8 Analysis Plot     
     20201003 221713 -930.0      N/A   N/A     N/A    0.00  60.0 SSMI18  20.7   87.7   20.7   87.7   20.2   87.0 Analysis Plot     
     20201003 235728 -930.0      N/A   N/A     N/A    0.00  60.0 SSMI18  20.9   87.8   20.9   87.8   20.1   87.1 Analysis Plot     
     20201004 015408    0.8      N/A  13.7% 133.32     .79  60.0    GMI  21.0   87.9   21.0   87.9   20.7   87.6 Analysis Plot     
     20201004 075927 -930.0      N/A   N/A     N/A    0.00  45.0  AMSR2  22.0   88.2   22.0   88.2   21.8   87.9 Analysis Plot     
     20201004 120757   -0.2      N/A  28.8% 155.54     .19  45.0 SSMI18  22.2   88.2   22.2   88.2   22.4   87.8 Analysis Plot     
     20201004 151310  -37.2      N/A 100.0%  22.22   22.24  50.0    GMI  22.2   88.2   22.2   88.2   23.0   88.3 Analysis Plot     
     20201004 220437   -1.5      N/A  11.0% 222.20    1.53  50.0 SSMI18  22.4   88.1   22.4   88.1   22.6   87.8 Analysis Plot     
     20201004 222957 -930.0      N/A   N/A     N/A    0.00  50.0 SSMI16  22.4   88.1   22.4   88.1   22.8   88.3 Analysis Plot     
     20201004 234515   -1.4      N/A  11.0% 222.20    1.40  50.0 SSMI18  22.4   88.1   22.4   88.1   22.6   87.8 Analysis Plot     
     20201005 115459   -1.2      N/A   N/A  222.20    1.18  45.0 SSMI18  22.6   87.6   22.6   87.6   22.8   87.6 Analysis Plot     
     20201005 122302 -930.0      N/A   N/A     N/A    0.00  50.0 SSMI16  22.7   87.7   22.7   87.7   22.9   87.6 Analysis Plot     
     20201005 221651   -0.6      N/A   2.7% 211.09     .56  30.0 SSMI16  22.1   88.1   22.1   88.1   21.9   88.3 Analysis Plot     
     20201005 233117 -930.0      N/A   N/A     N/A    0.00  30.0 SSMI18  22.0   88.2   22.0   88.2   21.1   88.3 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.