Tropical Storm 15W

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              
     20200927 022013 -930.0      N/A   N/A     N/A    0.00  30.0  AMSR2  20.9 -158.6   20.9 -158.6   20.6 -157.8 Analysis Plot     
     20200927 052844   -1.0      N/A   N/A   55.55    1.03  30.0 SSMI16  21.4 -158.4   21.4 -158.4   21.4 -158.0 Analysis Plot     
     20200927 064312   -1.0      N/A   N/A   33.33     .97  30.0 SSMI15  21.4 -158.3   21.4 -158.3   21.5 -157.9 Analysis Plot     
     20200927 105734 -930.0      N/A   N/A     N/A    0.00  30.0    GMI  22.7 -156.9   22.7 -156.9   22.5 -157.4 Analysis Plot     
     20200927 185651  -10.9      N/A  37.0%  22.22   10.88  35.0 SSMI16  24.7 -155.6   24.7 -155.6   25.6 -155.1 Analysis Plot     
     20200927 201048   -1.9      N/A  17.8% 133.32    1.86  35.0 SSMI18  25.5 -155.1   25.5 -155.1   26.3 -155.2 Analysis Plot     
     20200928 063849   -1.6      N/A  22.1% 244.42    1.64  40.0 SSMI18  28.0 -153.3   28.0 -153.3   28.5 -153.3 Analysis Plot     
     20200928 151053   -7.6      N/A  35.6%  44.44    7.57  45.0  AMSR2  29.9 -153.3   29.9 -153.2   29.9 -153.2 Analysis Plot     
     20200928 173236   -2.6      N/A  42.5%  77.77    2.64  45.0 SSMI15  30.5 -153.5   30.5 -153.5   30.7 -153.5 Analysis Plot     
     20200928 195831   -6.2      N/A  53.4%  44.44    6.24  50.0 SSMI18  30.8 -153.7   30.8 -153.7   31.0 -153.5 Analysis Plot     
     20200929 010310  -10.6      N/A  78.1%  44.44   10.58  50.0    GMI  32.7 -154.4   32.7 -154.4   33.1 -154.2 Analysis Plot     
     20200929 062604    N/A      N/A   N/A     N/A     N/A  60.0 SSMI18  34.4 -155.3   34.4 -155.3   34.7 -155.1 Analysis Plot     
     20200929 173749 -930.0      N/A   N/A     N/A    0.00  65.0 SSMI15  38.0 -158.3   38.0 -158.3   38.2 -158.1 Analysis Plot     
     20200930 001241 -930.0      N/A   N/A     N/A    0.00  55.0    GMI  39.3 -160.6   39.3 -160.6   39.7 -160.1 Analysis Plot     
     20200930 025612 -930.0      N/A   N/A     N/A    0.00  55.0  AMSR2  39.8 -161.5   39.8 -161.5   40.0 -160.8 Analysis Plot     
     20200930 044924    1.6      N/A   N/A   22.22    1.64  55.0 SSMI16  40.1 -162.1   40.1 -162.1   40.4 -162.8 Analysis Plot     
     20200930 061319 -930.0      N/A   N/A     N/A    0.00  55.0 SSMI18  40.4 -162.6   40.4 -162.6   40.6 -163.4 Analysis Plot     
     20200930 075444 -930.0      N/A   N/A     N/A    0.00  55.0 SSMI18  40.7 -163.3   40.7 -163.3   40.6 -163.4 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.