Tropical Depression 04B

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              
     20220818 191545 -930.0      N/A   N/A     N/A    0.00  35.0  AMSR2  20.6  -89.7   20.3  -90.0   20.3  -90.0 Analysis Plot     
     20220818 234108   -1.1      N/A   4.1% 211.09    1.07  35.0 SSMI18  20.8  -89.3   20.8  -89.3   21.4  -89.6 Analysis Plot     
     20220819 002322   -1.2      N/A   N/A  155.54    1.17  35.0 SSMI16  20.9  -89.2   20.9  -89.2   21.0  -89.4 Analysis Plot     
     20220819 012539 -930.0      N/A   N/A     N/A    0.00  35.0 SSMI17  20.9  -89.1   20.9  -89.1   20.9  -89.2 Analysis Plot     
     20220819 074737   -5.7      N/A  15.1%  55.55    5.69  45.0  AMSR2  21.1  -88.9   21.4  -88.8   21.4  -88.8 Analysis Plot     
     20220819 100058   -2.9      N/A  27.4%  77.77    2.94  45.0 SSMI18  21.2  -88.7   21.2  -88.7   21.6  -88.5 Analysis Plot     
     20220819 104502   -2.8      N/A  27.4% 133.32    2.76  45.0 SSMI16  21.3  -88.6   21.3  -88.6   21.5  -88.6 Analysis Plot     
     20220819 195650  -10.4      N/A  80.8%  11.11   10.41  35.0  AMSR2  22.2  -86.9   22.6  -86.8   22.6  -86.8 Analysis Plot     
     20220819 231736   -1.7      N/A  46.6%  44.44    1.75  35.0 SSMI18  22.3  -86.6   22.3  -86.6   22.8  -86.2 Analysis Plot     
     20220820 001015    N/A      N/A   N/A     N/A     N/A  35.0 SSMI16  22.4  -86.4   22.4  -86.4   22.5  -86.1 Analysis Plot     
     20220820 053052   -5.1      N/A  20.5%  44.44    5.10  35.0    GMI  22.8  -85.4   22.8  -85.4   23.0  -84.8 Analysis Plot     
     20220820 132202   -2.1      N/A   N/A   44.44    2.11  35.0 SSMI17  23.2  -84.1   23.2  -84.1   23.3  -83.6 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.