Tropical Depression 22L

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              
     20200918 001057   -0.1      N/A   N/A   22.22     .14  30.0 SSMI18  21.9   94.3   21.9   94.3   22.0   93.2 Analysis Plot     
     20200918 075932  -19.2      N/A 100.0%  22.22    4.24  30.0  AMSR2  22.9   94.1   22.9   94.1   23.5   93.8 Analysis Plot     
     20200918 103639  -16.1      N/A 100.0%  44.44    1.14  30.0 SSMI15  23.0   94.0   23.0   94.0   23.9   93.7 Analysis Plot     
     20200918 122117    N/A      N/A   N/A     N/A     N/A  30.0 SSMI18  23.1   94.0   23.1   94.0   23.8   93.5 Analysis Plot     
     20200918 124201   -1.9      N/A   8.2% 222.20    1.87  30.0 SSMI16  23.1   94.0   23.1   94.0   23.0   94.6 Analysis Plot     
     20200918 223542   -3.2      N/A  12.3% 222.20    3.17  35.0 SSMI16  24.4   93.1   24.4   93.1   24.8   93.4 Analysis Plot     
     20200919 100353 -930.0      N/A   N/A     N/A    0.00  50.0 SSMI15  26.1   92.5   26.1   92.5   26.0   91.9 Analysis Plot     
     20200919 123133   -4.9      N/A   N/A  122.21    4.90  50.0 SSMI16  26.2   92.6   26.2   92.6   26.4   92.3 Analysis Plot     
     20200919 193914    N/A      N/A   N/A     N/A     N/A  50.0  AMSR2  26.8   92.8   26.8   92.8   26.8   92.8 Analysis Plot     
     20200919 222242    N/A      N/A   N/A     N/A     N/A  50.0 SSMI16  26.6   92.4   26.6   92.4   27.0   92.4 Analysis Plot     
     20200920 074614    N/A      N/A   N/A     N/A     N/A  50.0  AMSR2  27.0   92.7   27.0   92.7   27.6   92.9 Analysis Plot     
     20200920 121548   -1.5      N/A  17.8% 177.76    1.46  50.0 SSMI16  27.1   92.9   27.1   92.9   27.3   92.0 Analysis Plot     
     20200920 220933   -2.9      N/A   N/A   44.44    2.93  50.0 SSMI16  27.7   94.0   27.7   94.0   27.6   94.0 Analysis Plot     
     20200921 082904 -930.0      N/A   N/A     N/A    0.00  45.0  AMSR2  27.7   95.1   27.7   95.1   27.9   95.5 Analysis Plot     
     20200921 115143    N/A      N/A   N/A     N/A     N/A  45.0 SSMI16  27.8   95.3   27.8   95.3   28.1   95.3 Analysis Plot     
     20200921 131816   -2.4      N/A  26.0% 144.43    2.37  45.0 SSMI18  27.8   95.5   27.8   95.5   28.2   95.1 Analysis Plot     
     20200921 215629   -2.9      N/A   N/A   44.44    2.92  40.0 SSMI16  28.2   96.1   28.2   96.1   27.9   96.0 Analysis Plot     
     20200921 231848   -0.1      N/A   N/A  144.43     .08  40.0 SSMI18  28.3   96.2   28.3   96.2   27.9   96.4 Analysis Plot     
     20200922 111302   -0.4      N/A   5.5% 211.09     .44  35.0 SSMI15  28.9   96.7   28.9   96.7   28.5   96.6 Analysis Plot     
     20200922 130550   -0.2      N/A   N/A   55.55     .25  35.0 SSMI18  28.9   96.7   28.9   96.7   29.0   96.8 Analysis Plot     
     20200922 192139   -0.7      N/A   N/A   22.22     .66  35.0    GMI  29.0   96.5   29.0   96.5   28.9   96.4 Analysis Plot     
     20200922 201137 -930.0      N/A   N/A     N/A    0.00  25.0  AMSR2  29.0   96.4   29.0   96.4   29.2   96.3 Analysis Plot     
     20200922 230629    N/A      N/A   N/A     N/A     N/A  25.0 SSMI18  29.0   96.2   29.0   96.2   28.8   96.3 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.