Tropical Depression 20S

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              
     20220313 220028  -55.0      N/A 100.0%  77.77   39.96  35.0 SSMI18 -13.9 -102.8  -14.2 -102.4  -14.2 -102.4 Analysis Plot     
     20220313 231758 -930.0      N/A   N/A     N/A    0.00  35.0 SSMI16 -14.1 -102.6  -14.5 -102.2  -14.5 -102.2 Analysis Plot     
     20220314 042715  -19.1      N/A  39.7%  77.77   19.10  35.0    GMI -14.7 -101.5  -15.0 -100.8  -15.0 -100.8 Analysis Plot     
     20220314 072451  -59.2      N/A 100.0%  88.88   44.18  45.0  AMSR2 -15.4 -100.4  -15.8 -100.5  -15.8 -100.5 Analysis Plot     
     20220314 100913  -41.5      N/A 100.0%  88.88   26.54  45.0 SSMI18 -15.6 -100.1  -16.2 -100.2  -16.2 -100.2 Analysis Plot     
     20220314 214152 -930.0      N/A   N/A     N/A    0.00  60.0 SSMI18 -16.8  -98.4  -16.8  -98.4  -16.8  -98.6 Analysis Plot     
     20220314 230659    7.0      N/A   5.5% 144.43    6.98  60.0 SSMI16 -16.9  -98.2  -16.9  -98.2  -17.2  -98.7 Analysis Plot     
     20220315 011443    N/A      N/A   N/A     N/A     N/A  60.0 SSMI17 -17.0  -97.9  -17.0  -97.9  -17.8  -97.1 Analysis Plot     
     20220315 095603    4.9      N/A  31.5%  55.55    4.93  55.0 SSMI18 -17.1  -96.7  -17.1  -96.7  -17.6  -96.9 Analysis Plot     
     20220315 110813    N/A      N/A   N/A     N/A     N/A  55.0 SSMI16 -17.1  -96.5  -17.1  -96.5  -18.0  -96.5 Analysis Plot     
     20220315 131427    N/A      N/A   N/A     N/A     N/A  55.0 SSMI17 -17.2  -96.1  -17.2  -96.1  -17.8  -96.8 Analysis Plot     
     20220315 150025 -930.0      N/A   N/A     N/A    0.00  55.0    GMI -17.3  -95.7  -17.6  -96.5  -17.6  -96.5 Analysis Plot     
     20220315 185928   39.6  >65 kts 100.0%  77.77   24.59  55.0  AMSR2 -17.7  -95.1  -18.0  -95.9  -18.0  -95.9 Analysis Plot     
     20220315 225350    N/A      N/A   N/A     N/A     N/A  55.0 SSMI16 -17.9  -94.6  -17.9  -94.6  -18.0  -95.7 Analysis Plot     
     20220316 041644    5.2      N/A   9.6% 211.09    5.24  55.0    GMI -18.3  -93.7  -18.3  -93.7  -18.5  -93.8 Analysis Plot     
     20220316 071148    N/A      N/A   N/A     N/A     N/A  40.0  AMSR2 -18.2  -93.5  -18.2  -93.5  -19.4  -93.3 Analysis Plot     
     20220316 105520   -4.3      N/A   N/A  222.20    4.29  40.0 SSMI16 -18.5  -93.2  -18.5  -93.2  -18.9  -93.2 Analysis Plot     
     20220316 130104   -2.5      N/A   6.8% 199.98    2.45  40.0 SSMI17 -18.8  -92.9  -18.8  -92.9  -19.3  -93.1 Analysis Plot     
     20220316 230053    N/A      N/A   N/A     N/A     N/A  40.0 SSMI18 -20.1  -92.4  -20.1  -92.4  -20.9  -92.6 Analysis Plot     
     20220317 004106   -1.5      N/A   N/A   99.99    1.54  40.0 SSMI17 -20.4  -92.4  -20.4  -92.4  -20.7  -93.1 Analysis Plot     
     20220317 075344    N/A      N/A   N/A     N/A     N/A  30.0  AMSR2 -21.8  -93.2  -21.8  -93.2  -23.1  -93.6 Analysis Plot     
     20220317 104213 -930.0      N/A   N/A     N/A    0.00  30.0 SSMI16 -22.0  -93.3  -22.0  -93.3  -22.1  -93.3 Analysis Plot     
     20220317 111143 -930.0      N/A   N/A     N/A    0.00  30.0 SSMI18 -22.0  -93.3  -22.0  -93.3  -22.7  -93.3 Analysis Plot     
     20220317 124735 -930.0      N/A   N/A     N/A    0.00  30.0 SSMI17 -22.1  -93.3  -22.1  -93.3  -23.2  -93.4 Analysis Plot     
     20220317 144711   -3.5      N/A   1.4% 166.65    3.47  25.0    GMI -23.3  -93.5  -23.3  -93.5  -23.4  -93.6 Analysis Plot     
     20220317 184908   -3.1      N/A   N/A  222.20    3.09  25.0  AMSR2 -23.6  -93.6  -23.6  -93.6  -23.6  -93.8 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.