Typhoon 17U

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              
     20200522 233237   -1.5      N/A   1.4% 166.65    1.49  30.0 SSMI18 -15.2  -97.2  -15.2  -97.2  -15.5  -97.2 Analysis Plot     
     20210228 070915   -1.8      N/A   N/A  155.54    1.77  25.0 SSMI16 -17.0 -147.9  -17.0 -147.9  -16.6 -148.1 Analysis Plot     
     20210228 151646    N/A      N/A   N/A     N/A     N/A  35.0  AMSR2 -17.2 -148.0  -17.2 -148.0  -17.7 -147.3 Analysis Plot     
     20210228 191632 -930.0      N/A   N/A     N/A    0.00  35.0 SSMI16 -17.2 -147.9  -17.2 -147.9  -17.7 -146.8 Analysis Plot     
     20210228 194153 -930.0      N/A   N/A     N/A    0.00  35.0 SSMI18 -17.3 -148.1  -17.3 -148.1  -17.7 -146.9 Analysis Plot     
     20210301 032936    N/A      N/A   N/A     N/A     N/A  35.0  AMSR2 -17.5 -147.1  -17.5 -147.1  -17.2 -146.3 Analysis Plot     
     20210301 075035   -1.6      N/A   N/A   22.22    1.57  35.0 SSMI18 -16.7 -146.6  -16.7 -146.6  -16.8 -145.9 Analysis Plot     
     20210301 192942    N/A      N/A   N/A     N/A     N/A  40.0 SSMI18 -16.0 -147.0  -16.0 -147.0  -15.3 -146.5 Analysis Plot     
     20210302 025316    N/A      N/A   N/A     N/A     N/A  45.0    GMI -15.0 -147.3  -15.0 -147.3  -15.3 -147.0 Analysis Plot     
     20210302 071242    N/A      N/A   N/A     N/A     N/A  45.0 SSMI18 -15.1 -147.2  -15.1 -147.2  -14.8 -147.2 Analysis Plot     
     20210302 091919    N/A      N/A   N/A     N/A     N/A  50.0 SSMI18 -14.8 -147.8  -14.8 -147.8  -14.7 -147.3 Analysis Plot     
     20210302 191811   -2.0      N/A  63.0%  55.55    2.03  50.0 SSMI18 -14.7 -147.7  -14.5 -147.7  -14.5 -147.7 Analysis Plot     
     20210303 031854    N/A      N/A   N/A     N/A     N/A  55.0  AMSR2 -14.8 -147.7  -14.8 -147.7  -14.4 -146.7 Analysis Plot     
     20210303 063002    N/A      N/A   N/A     N/A     N/A  55.0 SSMI16 -14.9 -147.8  -14.9 -147.7  -14.9 -147.7 Analysis Plot     
     20210303 065850    9.9      N/A  52.1% 111.10    9.94  55.0 SSMI18 -14.9 -147.8  -14.9 -147.8  -14.9 -147.3 Analysis Plot     
     20210303 090635   10.6      N/A  49.3% 122.21   10.59  55.0 SSMI18 -15.0 -147.9  -15.0 -147.9  -14.9 -147.4 Analysis Plot     
     20210303 190618   45.2  >65 kts 100.0%  55.55   30.25  60.0 SSMI18 -14.9 -148.3  -14.8 -148.3  -14.8 -148.3 Analysis Plot     
     20210304 040015   45.7  >65 kts 100.0%  44.44   30.73  70.0  AMSR2 -15.3 -149.1  -15.4 -149.1  -15.4 -149.1 Analysis Plot     
     20210304 061652   19.5      N/A  49.3%  33.33   19.48  70.0 SSMI16 -15.4 -149.4  -15.4 -149.5  -15.4 -149.5 Analysis Plot     
     20210304 064607   19.7      N/A  57.5%  33.33   19.68  70.0 SSMI18 -15.4 -149.5  -15.5 -149.5  -15.5 -149.5 Analysis Plot     
     20210304 085345   20.1  >65 kts  57.5%  33.33   20.08  80.0 SSMI18 -15.5 -149.7  -15.5 -149.5  -15.5 -149.5 Analysis Plot     
     20210304 145236 -930.0      N/A   N/A     N/A    0.00  80.0  AMSR2 -15.6 -151.3  -15.5 -151.6  -15.5 -151.6 Analysis Plot     
     20210304 185852   48.2  >65 kts 100.0%  33.33   33.17  80.0 SSMI18 -15.9 -152.0  -15.8 -152.6  -15.8 -152.6 Analysis Plot     
     20210305 030436   56.9  >65 kts 100.0%  33.33   41.89  90.0  AMSR2 -17.0 -155.3  -17.2 -155.8  -17.2 -155.8 Analysis Plot     
     20210305 060349   48.5  >65 kts 100.0%  22.22   33.48  90.0 SSMI16 -17.4 -156.0  -17.8 -156.8  -17.8 -156.8 Analysis Plot     
     20210305 063337   43.2  >65 kts 100.0%  22.22   28.23  90.0 SSMI18 -17.5 -156.2  -17.9 -156.9  -17.9 -156.9 Analysis Plot     
     20210305 084107   42.8  >65 kts 100.0%  22.22   27.81 100.0 SSMI18 -17.9 -157.4  -17.9 -156.9  -17.9 -156.9 Analysis Plot     
     20210305 133554 -930.0      N/A   N/A     N/A    0.00 110.0    GMI -19.0 -159.7  -19.0 -159.7  -18.6 -160.1 Analysis Plot     
     20210305 181103    6.5      N/A  34.2% 133.32    6.53 110.0 SSMI16 -19.8 -161.0  -19.6 -160.9  -19.6 -160.9 Analysis Plot     
     20210305 185327    6.3      N/A  31.5% 166.65    6.25 110.0 SSMI18 -19.9 -161.2  -19.8 -161.1  -19.8 -161.1 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.