Tropical Depression 16R

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              
     20210419 133159   -1.7      N/A   N/A  222.20    1.67  25.0 SSMI16 -10.8  -57.2  -10.8  -57.2  -11.0  -57.0 Analysis Plot     
     20210419 184518 -930.0      N/A   N/A     N/A    0.00  25.0    GMI -11.2  -55.5  -11.2  -55.5  -11.0  -55.1 Analysis Plot     
     20210419 213738    N/A      N/A   N/A     N/A     N/A  25.0  AMSR2 -11.3  -54.7  -11.3  -54.7  -11.0  -54.7 Analysis Plot     
     20210420 011514   -4.2      N/A  28.8% 122.21    4.20  25.0 SSMI16 -11.3  -54.1  -11.3  -54.1  -10.8  -53.9 Analysis Plot     
     20210420 095336  -17.3      N/A 100.0%  11.11    2.27  30.0  AMSR2 -11.0  -51.7  -10.8  -51.9  -10.8  -51.9 Analysis Plot     
     20210420 132625   -2.7      N/A  31.5% 133.32    2.73  30.0 SSMI16 -10.8  -51.0  -10.6  -51.1  -10.6  -51.1 Analysis Plot     
     20210421 103635   44.3  >65 kts 100.0%  55.55   29.26  55.0  AMSR2  -9.7  -47.6   -9.7  -47.6   -9.8  -47.8 Analysis Plot     
     20210421 134655   13.0      N/A  79.5%  44.44   12.95  65.0 SSMI18  -9.8  -47.5   -9.8  -47.5   -9.9  -47.4 Analysis Plot     
     20210421 141213    6.4      N/A  53.4%  33.33    6.36  55.0 SSMI15  -9.6  -47.3   -9.6  -47.3   -9.9  -47.5 Analysis Plot     
     20210421 183519    N/A      N/A   N/A     N/A     N/A  65.0    GMI  -9.8  -46.8   -9.8  -46.8   -9.8  -47.0 Analysis Plot     
     20210422 022220    N/A      N/A   N/A     N/A     N/A  55.0 SSMI16  -9.6  -46.3  -10.0  -46.5  -10.0  -46.5 Analysis Plot     
     20210422 134857    N/A      N/A   N/A     N/A     N/A  40.0 SSMI18  -9.5  -44.9   -9.5  -44.9  -10.0  -45.3 Analysis Plot     
     20210423 020916  -48.0      N/A 100.0% 111.10   33.00  40.0 SSMI16  -9.1  -44.0   -9.1  -44.5   -9.1  -44.5 Analysis Plot     
     20210423 065542    N/A      N/A   N/A     N/A     N/A  40.0    GMI  -8.9  -43.9   -9.0  -44.0   -9.0  -44.0 Analysis Plot     
     20210423 102505   -0.0      N/A  72.6%  22.22     .05  40.0  AMSR2  -8.8  -43.6   -8.8  -43.6   -8.9  -43.8 Analysis Plot     
     20210423 142813    N/A      N/A   N/A     N/A     N/A  45.0 SSMI16  -8.8  -43.7   -8.8  -43.7   -8.6  -44.1 Analysis Plot     
     20210423 182459 -930.0      N/A   N/A     N/A    0.00  45.0    GMI  -8.6  -43.3   -8.6  -43.3   -8.4  -44.0 Analysis Plot     
     20210424 020438    N/A      N/A   N/A     N/A     N/A  30.0 SSMI16  -8.0  -41.3   -8.0  -41.3   -7.9  -40.7 Analysis Plot     
     20210424 024318    N/A      N/A   N/A     N/A     N/A  30.0 SSMI18  -8.0  -41.2   -8.0  -41.2   -8.0  -40.8 Analysis Plot     
     20210424 110810  -16.7      N/A  93.2%  11.11    1.73  30.0  AMSR2  -7.4  -39.9   -7.4  -39.9   -7.9  -39.7 Analysis Plot     
     20210424 142331    N/A      N/A   N/A     N/A     N/A  25.0 SSMI16  -7.1  -39.7   -7.1  -39.7   -7.6  -39.7 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.