Tropical Depression 22W

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              
     20211007 115308   -0.1      N/A   5.5%  44.44     .10  30.0 SSMI17  17.4 -110.8   17.4 -110.8   17.8 -110.9 Analysis Plot     
     20211007 141142 -930.0      N/A   N/A     N/A    0.00  30.0    GMI  17.5 -110.7   17.5 -110.7   16.5 -111.3 Analysis Plot     
     20211007 175449 -930.0      N/A   N/A     N/A    0.00  30.0  AMSR2  17.8 -110.5   17.8 -110.5   18.2 -110.3 Analysis Plot     
     20211007 214257   -2.2      N/A  11.9% 322.19    2.18  30.0 SSMI18  17.5 -111.0   17.5 -111.0   17.5 -111.1 Analysis Plot     
     20211008 062555 -930.0      N/A   N/A     N/A    0.00  35.0  AMSR2  18.2 -110.6   18.2 -110.6   19.0 -111.3 Analysis Plot     
     20211008 113943    N/A      N/A   N/A     N/A     N/A  35.0 SSMI17  18.8 -110.6   18.8 -110.6   18.8 -110.6 Analysis Plot     
     20211008 183630 -930.0      N/A   N/A     N/A    0.00  40.0  AMSR2  19.3 -110.1   19.3 -110.1   19.6 -109.2 Analysis Plot     
     20211009 004511 -930.0      N/A   N/A     N/A    0.00  35.0    GMI  19.8 -109.9   19.8 -109.9   20.6 -109.6 Analysis Plot     
     20211009 005855   -1.2      N/A  12.3% 155.54    1.15  35.0 SSMI17  19.7 -109.9   19.7 -109.9   19.4 -109.9 Analysis Plot     
     20211009 053158 -930.0      N/A   N/A     N/A    0.00  35.0  AMSR2  19.9 -109.2   19.9 -109.2   19.9 -110.5 Analysis Plot     
     20211009 094003 -930.0      N/A   N/A     N/A    0.00  35.0 SSMI18  20.1 -109.1   20.1 -109.1   19.7 -109.5 Analysis Plot     
     20211009 095539 -930.0      N/A   N/A     N/A    0.00  35.0 SSMI16  20.1 -109.1   20.1 -109.1   19.4 -110.1 Analysis Plot     
     20211009 112837 -930.0      N/A   N/A     N/A    0.00  35.0 SSMI17  20.2 -109.0   20.2 -109.0   19.4 -110.2 Analysis Plot     
     20211009 231104 -930.0      N/A   N/A     N/A    0.00  35.0 SSMI16  20.2 -108.1   20.2 -108.1   19.6 -108.3 Analysis Plot     
     20211010 003649 -930.0      N/A   N/A     N/A    0.00  35.0 SSMI17  20.2 -107.9   20.2 -107.9   19.7 -108.2 Analysis Plot     
     20211010 094303   -0.8      N/A   N/A  166.65     .80  25.0 SSMI16  20.7 -106.3   20.7 -106.3   20.9 -106.7 Analysis Plot     
     20211010 111527   -2.0      N/A   N/A  111.10    2.04  25.0 SSMI17  20.7 -106.2   20.7 -106.2   20.3 -106.5 Analysis Plot     
     20211010 230016    N/A      N/A   N/A     N/A     N/A  25.0 SSMI16  20.3 -105.2   20.3 -105.2   20.0 -104.3 Analysis Plot     
     20211011 002235 -930.0      N/A   N/A     N/A    0.00  25.0 SSMI17  20.2 -105.1   20.2 -105.1   20.1 -104.7 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.