Tropical Depression 03W

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              
     20200801 074418   -5.4      N/A   N/A   44.44    5.37  30.0 SSMI16  20.7 -127.9   20.7 -127.9   21.2 -127.6 Analysis Plot     
     20200801 102659 -930.0      N/A   N/A     N/A    0.00  30.0 SSMI18  21.2 -127.4   21.2 -127.4   21.1 -126.7 Analysis Plot     
     20200801 175305 -930.0      N/A   N/A     N/A    0.00  30.0  AMSR2  22.2 -126.0   22.2 -126.0   22.2 -125.8 Analysis Plot     
     20200801 202418   -3.9      N/A  17.8% 188.87    3.87  30.0 SSMI15  22.4 -125.8   22.4 -125.8   22.0 -125.6 Analysis Plot     
     20200801 220435   -1.7      N/A   4.1% 166.65    1.67  35.0 SSMI18  22.3 -125.7   22.3 -125.7   22.3 -125.0 Analysis Plot     
     20200802 092253  -10.3      N/A  21.9%  88.88   10.32  40.0 SSMI16  23.4 -124.4   23.4 -124.4   23.0 -124.4 Analysis Plot     
     20200802 101418   -2.0      N/A  19.2%  77.77    1.98  40.0 SSMI18  23.5 -124.3   23.5 -124.3   23.1 -124.3 Analysis Plot     
     20200802 204952  -12.6      N/A  11.0%  77.77   12.62  50.0 SSMI16  24.5 -123.8   24.5 -123.8   24.4 -123.8 Analysis Plot     
     20200802 215109  -17.4      N/A  24.7%  55.55   17.41  50.0 SSMI18  24.6 -123.6   24.6 -123.6   24.5 -123.6 Analysis Plot     
     20200803 100142   23.4  >65 kts  30.1%  77.77   23.43  65.0 SSMI18  26.8 -122.2   26.3 -122.2   26.3 -122.2 Analysis Plot     
     20200803 173816   58.4  >65 kts 100.0%  55.55   43.40  70.0  AMSR2  27.8 -121.1   27.8 -121.2   27.8 -121.2 Analysis Plot     
     20200803 213816   62.0  >85 kts 100.0%  55.55   47.04  70.0 SSMI18  28.3 -120.8   28.3 -120.9   28.3 -120.9 Analysis Plot     
     20200804 080346 -930.0      N/A   N/A     N/A    0.00  30.0 SSMI18  30.0 -120.3   30.0 -120.3   30.6 -120.2 Analysis Plot     
     20200804 095821 -930.0      N/A   N/A     N/A    0.00  30.0 SSMI18  30.4 -120.3   30.4 -120.3   30.8 -120.1 Analysis Plot     
     20200804 182036 -930.0      N/A   N/A     N/A    0.00  25.0  AMSR2  32.4 -120.4   32.4 -120.4   32.8 -119.9 Analysis Plot     
     20200804 212546 -930.0      N/A   N/A     N/A    0.00  25.0 SSMI15  32.7 -120.5   32.7 -120.5   33.1 -120.0 Analysis Plot     
     20200804 221410 -930.0      N/A   N/A     N/A    0.00  25.0 SSMI16  32.9 -120.5   32.9 -120.5   33.0 -119.7 Analysis Plot     
     20200805 052130   -2.5      N/A   N/A   22.22    2.50  25.0  AMSR2  34.6 -121.2   34.6 -121.2   34.8 -121.2 Analysis Plot     
     20200805 080726   -1.7      N/A   N/A  133.32    1.72  25.0 SSMI18  35.1 -121.6   35.1 -121.6   35.0 -121.9 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.