Tropical Depression 20U

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              
     20190317 064937    N/A      N/A   N/A     N/A     N/A  25.0 SSMI15 -10.8 -146.7  -10.8 -146.7  -11.9 -147.3 Analysis Plot     
     20190317 090712   -5.2      N/A   N/A   22.22    5.18  25.0 SSMI17 -10.9 -146.8  -10.9 -146.8  -11.3 -146.4 Analysis Plot     
     20190317 112353   -5.0      N/A   N/A   22.22    5.03  25.0 SSMI17 -11.0 -146.8  -11.0 -146.8  -11.3 -146.4 Analysis Plot     
     20190317 191154   -8.3      N/A  53.4% 144.43    8.27  30.0 SSMI16 -12.5 -146.3  -12.2 -145.9  -12.2 -145.9 Analysis Plot     
     20190317 211236 -930.0      N/A   N/A     N/A    0.00  35.0 SSMI17 -12.6 -145.8  -12.0 -145.7  -12.0 -145.7 Analysis Plot     
     20190318 085309  -17.8      N/A 100.0%  22.22    2.80  50.0 SSMI17 -12.6 -145.2  -12.6 -145.2  -12.4 -145.4 Analysis Plot     
     20190318 085309  -17.8      N/A 100.0%  22.22    2.80  50.0 SSMI18 -12.6 -145.2  -12.6 -145.2  -12.4 -145.4 Analysis Plot     
     20190318 111039  -17.6      N/A 100.0%  22.22    2.56  50.0 SSMI17 -12.6 -145.1  -12.6 -145.1  -12.4 -145.4 Analysis Plot     
     20190318 185843   36.5  >65 kts 100.0% 133.32   21.54  55.0 SSMI16 -13.0 -144.7  -12.8 -144.8  -12.8 -144.8 Analysis Plot     
     20190318 210813    0.2      N/A  57.5%  11.11     .20  65.0 SSMI18 -13.0 -144.5  -12.8 -144.4  -12.8 -144.4 Analysis Plot     
     20190319 063831   58.0  >65 kts 100.0%  44.44   43.02  80.0 SSMI16 -13.1 -143.5  -13.1 -143.6  -13.1 -143.6 Analysis Plot     
     20190319 084028 -930.0      N/A   N/A     N/A    0.00  85.0 SSMI17 -13.0 -143.4  -12.9 -143.6  -12.9 -143.6 Analysis Plot     
     20190319 205606    N/A      N/A   N/A     N/A     N/A  50.0 SSMI18 -13.3 -142.5  -13.3 -142.5  -12.8 -142.2 Analysis Plot     
     20190319 222437 -930.0      N/A   N/A     N/A    0.00  50.0 SSMI17 -13.3 -142.4  -13.3 -142.4  -12.8 -141.9 Analysis Plot     
     20190320 062521  -14.1      N/A  45.2%  99.99   14.13  35.0 SSMI16 -13.1 -141.8  -13.1 -142.0  -13.1 -142.0 Analysis Plot     
     20190320 084227 -930.0      N/A   N/A     N/A    0.00  35.0    GMI -13.0 -141.8  -13.3 -142.0  -13.3 -142.0 Analysis Plot     
     20190320 105610   -9.9      N/A  24.7%  99.99    9.91  35.0 SSMI18 -13.0 -141.8  -13.2 -141.9  -13.2 -141.9 Analysis Plot     
     20190320 204355   -1.9      N/A  11.0% 177.76    1.90  35.0 SSMI18 -13.0 -141.3  -13.3 -141.3  -13.3 -141.3 Analysis Plot     
     20190321 061206 -930.0      N/A   N/A     N/A    0.00  35.0 SSMI16 -13.0 -141.1  -13.3 -141.3  -13.3 -141.3 Analysis Plot     
     20190321 082740    N/A      N/A   N/A     N/A     N/A  50.0 SSMI18 -13.3 -141.3  -14.0 -141.3  -14.0 -141.3 Analysis Plot     
     20190321 191817   63.2  >85 kts 100.0%  66.66   48.18  60.0    GMI -13.9 -140.5  -14.2 -140.1  -14.2 -140.1 Analysis Plot     
     20190321 215903   36.1  >65 kts 100.0%  44.44   21.05  60.0 SSMI18 -14.3 -140.0  -14.2 -139.9  -14.2 -139.9 Analysis Plot     
     20190322 040635   19.3      N/A  57.5%  44.44   19.27  70.0  AMSR2 -14.5 -139.4  -14.4 -139.5  -14.4 -139.5 Analysis Plot     
     20190322 081439   40.2  >65 kts 100.0%  33.33   25.23  70.0 SSMI18 -14.7 -139.1  -14.9 -139.2  -14.9 -139.2 Analysis Plot     
     20190322 094227   30.8  >65 kts  91.8%  22.22   15.85  70.0 SSMI17 -14.8 -139.1  -14.9 -139.1  -14.9 -139.1 Analysis Plot     
     20190322 103114   44.4  >65 kts 100.0%  22.22   29.44  70.0 SSMI18 -14.8 -139.0  -14.9 -139.1  -14.9 -139.1 Analysis Plot     
     20190322 114844   29.8  >65 kts  93.2%  22.22   14.75  70.0 SSMI17 -14.9 -138.9  -14.9 -139.1  -14.9 -139.1 Analysis Plot     
     20190322 193818   46.6  >65 kts 100.0%  88.88   31.59  95.0 SSMI16 -15.6 -138.1  -15.5 -138.1  -15.5 -138.1 Analysis Plot     
     20190322 214534   50.6  >65 kts 100.0%  88.88   35.56  95.0 SSMI17 -15.8 -137.8  -15.7 -137.8  -15.7 -137.8 Analysis Plot     
     20190323 080009    N/A      N/A   N/A     N/A     N/A  90.0 SSMI16 -16.5 -136.6  -17.1 -136.1  -17.1 -136.1 Analysis Plot     
     20190323 092837    N/A      N/A   N/A     N/A     N/A  65.0 SSMI17 -16.9 -136.4  -17.2 -135.9  -17.2 -135.9 Analysis Plot     
     20190323 113514    N/A      N/A   N/A     N/A     N/A  65.0 SSMI17 -17.1 -136.2  -17.2 -135.9  -17.2 -135.9 Analysis Plot     
     20190323 192513    N/A      N/A   N/A     N/A     N/A  45.0 SSMI16 -18.2 -135.3  -18.2 -135.3  -18.4 -134.6 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.