Tropical Depression 16W


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              
     20180730 162028 -930.0      N/A   N/A     N/A    0.00  25.0    GMI  29.2 -152.3   29.2 -152.3   29.1 -152.4 Analysis Plot     
     20180730 214814   -2.7      N/A   N/A  211.09    2.72  30.0 SSMI17  29.7 -152.3   29.7 -152.3   29.6 -152.5 Analysis Plot     
     20180731 020451 -930.0      N/A   N/A     N/A    0.00  30.0    GMI  30.9 -152.4   30.9 -152.4   30.4 -152.4 Analysis Plot     
     20180731 051047 -930.0      N/A   N/A     N/A    0.00  30.0 SSMI16  31.4 -152.2   31.4 -152.2   31.0 -151.6 Analysis Plot     
     20180731 093129   -2.0      N/A  23.3% 111.10    1.98  30.0 SSMI17  32.3 -150.7   32.3 -150.7   32.5 -151.1 Analysis Plot     
     20180731 154445 -930.0      N/A   N/A     N/A    0.00  25.0  AMSR2  33.1 -150.7   33.1 -150.7   33.6 -150.5 Analysis Plot     
     20180731 214413 -930.0      N/A   N/A     N/A    0.00  25.0 SSMI18  34.6 -150.1   34.6 -150.1   34.4 -150.0 Analysis Plot     
     20180801 024701   -3.7      N/A   6.8% 211.09    3.74  25.0  AMSR2  35.4 -150.1   35.4 -150.1   34.9 -150.1 Analysis Plot     
     20180801 091748   -3.2      N/A   2.9% 288.86    3.22  25.0 SSMI17  36.4 -150.2   36.4 -150.2   35.8 -150.4 Analysis Plot     
     20180801 161225   -3.4      N/A   N/A   11.11    3.43  25.0    GMI  38.0 -151.5   38.0 -151.5   37.2 -151.4 Analysis Plot     
     20180801 162732 -930.0      N/A   N/A     N/A    0.00  25.0  AMSR2  38.2 -151.7   38.2 -151.7   37.3 -151.4 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.