Tropical Depression 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              
     20221019 192104   -2.3      N/A   N/A   77.77    2.32  25.0 SSMI18  20.8 -130.1   20.8 -130.1   21.3 -129.9 Analysis Plot     
     20221019 232047   -1.2      N/A  12.3%  22.22    1.23  25.0 SSMI17  20.8 -129.6   20.8 -129.6   20.6 -129.3 Analysis Plot     
     20221020 105451   -1.3      N/A   3.2% 233.31    1.30  25.0 SSMI16  21.2 -128.0   21.2 -128.0   21.8 -127.6 Analysis Plot     
     20221020 112743   -1.7      N/A   1.4% 222.20    1.73  25.0 SSMI17  21.2 -127.9   21.2 -127.9   21.8 -127.6 Analysis Plot     
     20221020 165206 -930.0      N/A   N/A     N/A    0.00  25.0  AMSR2  20.5 -126.3   20.5 -126.3   20.2 -127.3 Analysis Plot     
     20221020 223015 -930.0      N/A   N/A     N/A    0.00  30.0 SSMI16  20.5 -125.4   20.5 -125.4   19.5 -125.5 Analysis Plot     
     20221020 230721 -930.0      N/A   N/A     N/A    0.00  30.0 SSMI17  20.5 -125.3   20.5 -125.3   19.4 -125.5 Analysis Plot     
     20221021 052403    N/A      N/A   N/A     N/A     N/A  30.0  AMSR2  20.5 -123.7   20.5 -123.7   20.5 -123.7 Analysis Plot     
     20221021 081525   -1.7      N/A   N/A  155.54    1.65  30.0 SSMI18  20.3 -122.7   20.3 -122.7   20.5 -123.1 Analysis Plot     
     20221021 103159   -0.6      N/A   N/A  155.54     .64  30.0 SSMI16  20.3 -122.2   20.3 -122.2   19.6 -121.6 Analysis Plot     
     20221021 173415   -4.2      N/A  13.7% 211.09    4.24  30.0  AMSR2  20.4 -120.5   20.4 -120.5   20.6 -120.9 Analysis Plot     
     20221021 213457   -1.9      N/A   N/A  288.86    1.93  25.0 SSMI18  20.2 -119.3   20.2 -119.3   20.1 -119.9 Analysis Plot     
     20221021 220842 -930.0      N/A   N/A     N/A    0.00  25.0 SSMI16  20.2 -119.3   20.2 -119.3   20.4 -119.8 Analysis Plot     
     20221022 094350   -2.6      N/A   N/A  133.32    2.55  25.0 SSMI18  20.1 -119.1   20.1 -119.1   20.5 -119.3 Analysis Plot     
     20221022 105101   -1.1      N/A   N/A   33.33    1.14  25.0 SSMI17  20.1 -118.9   20.1 -118.9   20.4 -118.8 Analysis Plot     
     20221022 181746   -3.5      N/A  13.7%  66.66    3.53  25.0  AMSR2  20.4 -117.8   20.4 -117.8   20.7 -117.7 Analysis Plot     
     20221022 212131   -2.0      N/A   2.7% 111.10    1.99  25.0 SSMI18  20.3 -117.5   20.3 -117.5   20.4 -117.5 Analysis Plot     
     20221022 215535 -930.0      N/A   N/A     N/A    0.00  25.0 SSMI16  20.0 -117.5   20.0 -117.5   19.3 -117.7 Analysis Plot     
     20221023 002042   -1.7      N/A   5.5% 122.21    1.74  25.0 SSMI17  20.2 -117.0   20.2 -117.0   19.9 -117.1 Analysis Plot     
     20221023 051218   -3.4      N/A  12.3%  33.33    3.43  25.0  AMSR2  20.0 -116.0   20.0 -116.0   19.9 -116.2 Analysis Plot     
     20221023 103730   -0.9      N/A   N/A   66.66     .91  25.0 SSMI17  19.7 -115.2   19.7 -115.2   20.1 -115.5 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.