Tropical Depression 27S

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              
     20210404 214828    N/A      N/A   N/A     N/A     N/A  35.0 SSMI16 -15.0 -104.8  -15.0 -104.8  -15.1 -105.6 Analysis Plot     
     20210404 222606   -2.7      N/A  46.6%  33.33    2.69  35.0 SSMI18 -15.0 -104.8  -15.0 -104.8  -15.1 -105.4 Analysis Plot     
     20210405 083032   -4.9      N/A  56.2%  66.66    4.92  45.0    GMI -15.6 -105.0  -16.3 -105.4  -16.3 -105.4 Analysis Plot     
     20210405 095937   -1.6      N/A  54.8%  55.55    1.62  45.0 SSMI16 -15.6 -105.0  -15.6 -105.0  -16.4 -105.4 Analysis Plot     
     20210405 104314   -0.1      N/A  52.1%  44.44     .10  45.0 SSMI18 -15.6 -105.0  -15.6 -105.0  -16.4 -105.1 Analysis Plot     
     20210405 180909  -21.1      N/A 100.0%  22.22    6.13  45.0  AMSR2 -16.2 -105.3  -16.2 -105.3  -16.8 -105.0 Analysis Plot     
     20210405 222218    N/A      N/A   N/A     N/A     N/A  45.0 SSMI18 -16.2 -105.4  -16.2 -105.4  -17.4 -104.9 Analysis Plot     
     20210406 062207    N/A      N/A   N/A     N/A     N/A  45.0  AMSR2 -16.2 -105.7  -16.2 -105.7  -16.7 -105.5 Analysis Plot     
     20210406 094649 -930.0      N/A   N/A     N/A    0.00  45.0 SSMI16 -16.1 -105.9  -16.1 -105.9  -16.8 -106.0 Analysis Plot     
     20210406 102052    N/A      N/A   N/A     N/A     N/A  45.0 SSMI18 -16.1 -105.9  -16.1 -105.9  -16.6 -106.1 Analysis Plot     
     20210406 220928    N/A      N/A   N/A     N/A     N/A  35.0 SSMI18 -16.4 -106.2  -16.4 -106.2  -17.2 -105.6 Analysis Plot     
     20210407 070531   -4.4      N/A   N/A   88.88    4.41  40.0  AMSR2 -15.9 -105.7  -15.9 -105.7  -16.1 -105.7 Analysis Plot     
     20210407 100807   -1.4      N/A  19.2%  33.33    1.43  40.0 SSMI18 -15.8 -105.7  -15.8 -105.7  -16.6 -105.9 Analysis Plot     
     20210407 175702    N/A      N/A   N/A     N/A     N/A  40.0  AMSR2 -15.8 -106.6  -15.8 -106.6  -16.4 -105.2 Analysis Plot     
     20210407 214540    N/A      N/A   N/A     N/A     N/A  40.0 SSMI18 -16.0 -106.0  -16.0 -106.0  -16.4 -105.1 Analysis Plot     
     20210407 221623 -930.0      N/A   N/A     N/A    0.00  40.0 SSMI15 -16.0 -106.0  -16.0 -106.0  -16.2 -104.9 Analysis Plot     
     20210408 061028 -930.0      N/A   N/A     N/A    0.00  40.0  AMSR2 -15.6 -106.5  -15.6 -106.5  -15.1 -105.5 Analysis Plot     
     20210408 100448   -2.2      N/A   N/A   33.33    2.18  35.0 SSMI18 -15.4 -105.9  -15.4 -105.9  -15.3 -105.6 Analysis Plot     
     20210408 183931    N/A      N/A   N/A     N/A     N/A  40.0  AMSR2 -14.4 -106.5  -14.1 -106.6  -14.1 -106.6 Analysis Plot     
     20210408 221138    N/A      N/A   N/A     N/A     N/A  40.0 SSMI15 -14.4 -106.9  -14.1 -106.8  -14.1 -106.8 Analysis Plot     
     20210408 223757 -930.0      N/A   N/A     N/A    0.00  40.0 SSMI16 -14.4 -107.1  -14.6 -107.0  -14.6 -107.0 Analysis Plot     
     20210409 065342 -930.0      N/A   N/A     N/A    0.00  50.0  AMSR2 -14.9 -109.0  -14.9 -109.0  -15.1 -109.6 Analysis Plot     
     20210409 180256 -930.0      N/A   N/A     N/A    0.00  40.0    GMI -17.0 -111.6  -17.0 -111.6  -16.9 -111.6 Analysis Plot     
     20210409 213210    N/A      N/A   N/A     N/A     N/A  40.0 SSMI18 -17.8 -112.2  -17.8 -112.2  -17.9 -112.3 Analysis Plot     
     20210409 225031   -7.4      N/A   2.7% 222.20    7.40  40.0 SSMI15 -17.8 -112.2  -17.8 -112.2  -17.8 -112.1 Analysis Plot     
     20210410 055613    N/A      N/A   N/A     N/A     N/A  35.0  AMSR2 -20.4 -112.4  -20.4 -112.4  -20.8 -111.8 Analysis Plot     
     20210410 093002    N/A      N/A   N/A     N/A     N/A  30.0 SSMI18 -22.1 -112.7  -22.1 -112.7  -22.5 -113.7 Analysis Plot     
     20210410 104848 -930.0      N/A   N/A     N/A    0.00  30.0 SSMI15 -22.3 -112.6  -22.3 -112.6  -22.4 -113.7 Analysis Plot     
     20210410 171018 -930.0      N/A   N/A     N/A    0.00  35.0    GMI -22.8 -111.5  -22.8 -111.5  -21.7 -110.9 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.