Tropical Depression 02S

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              
     20201207 120647  -11.9      N/A  26.0%  66.66   11.85  35.0 SSMI18 -14.9  -81.0  -14.9  -81.0  -15.3  -81.1 Analysis Plot     
     20201207 194211  -13.7      N/A  67.1%  77.77   13.68  45.0  AMSR2 -15.7  -79.7  -15.7  -79.4  -15.7  -79.4 Analysis Plot     
     20201207 225032  -33.0      N/A  95.9%  44.44   17.96  45.0 SSMI15 -16.0  -79.1  -16.1  -79.2  -16.1  -79.2 Analysis Plot     
     20201207 235443  -32.6      N/A  87.7%  33.33   17.65  45.0 SSMI18 -16.0  -79.2  -16.0  -79.2  -16.0  -79.3 Analysis Plot     
     20201208 011947  -16.3      N/A  39.7%  44.44   16.27  45.0 SSMI16 -16.1  -79.0  -16.1  -79.0  -16.0  -79.3 Analysis Plot     
     20201208 115345    6.2      N/A  61.6%  33.33    6.19  55.0 SSMI18 -17.5  -77.6  -17.5  -77.6  -17.7  -77.4 Analysis Plot     
     20201208 130116 -930.0      N/A   N/A     N/A    0.00  55.0 SSMI15 -17.5  -77.6  -17.5  -77.6  -17.8  -77.3 Analysis Plot     
     20201208 202527    N/A      N/A   N/A     N/A     N/A  55.0  AMSR2 -19.0  -76.6  -19.3  -76.8  -19.3  -76.8 Analysis Plot     
     20201208 233312   28.4  >65 kts 100.0%  33.33   13.39  55.0 SSMI16 -19.2  -76.5  -19.2  -76.5  -19.6  -76.7 Analysis Plot     
     20201209 074025  -32.5      N/A  93.2%  33.33   17.51  45.0    GMI -20.6  -75.9  -20.6  -75.9  -20.9  -76.4 Analysis Plot     
     20201209 083618   -0.9      N/A  27.4%  33.33     .95  45.0  AMSR2 -20.6  -75.8  -20.6  -75.8  -21.2  -76.3 Analysis Plot     
     20201209 123442   -8.6      N/A   5.5% 211.09    8.59  45.0 SSMI15 -20.7  -75.7  -20.7  -75.7  -20.5  -76.1 Analysis Plot     
     20201209 232230   -4.8      N/A   5.5% 199.98    4.84  40.0 SSMI15 -20.7  -75.8  -20.7  -75.8  -20.7  -76.1 Analysis Plot     
     20201210 113725 -930.0      N/A   N/A     N/A    0.00  40.0 SSMI16 -21.3  -75.5  -21.3  -75.5  -21.2  -75.8 Analysis Plot     
     20201210 131840   -1.1      N/A   N/A  188.87    1.08  40.0 SSMI15 -21.3  -75.5  -21.3  -75.5  -21.2  -75.8 Analysis Plot     
     20201210 201403    N/A      N/A   N/A     N/A     N/A  35.0  AMSR2 -22.2  -74.9  -22.2  -74.9  -23.2  -75.7 Analysis Plot     
     20201211 004644 -930.0      N/A   N/A     N/A    0.00  35.0 SSMI18 -22.2  -74.3  -22.2  -74.3  -22.0  -74.5 Analysis Plot     
     20201211 082437   -1.7      N/A   N/A  211.09    1.75  35.0  AMSR2 -21.6  -73.9  -21.6  -73.9  -21.7  -73.9 Analysis Plot     
     20201211 125702    N/A      N/A   N/A     N/A     N/A  35.0 SSMI18 -21.5  -73.1  -21.5  -73.1  -21.7  -72.8 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.