Tropical Storm 23P

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              
     20210301 032940   -2.4      N/A  52.4%  66.66    2.45  35.0  AMSR2 -17.0 -147.2  -17.0 -147.2  -17.2 -146.3 Analysis Plot     
     20210301 075545   -4.5      N/A   N/A   99.99    4.53  35.0 SSMI15 -16.8 -147.2  -16.8 -147.2  -17.0 -146.9 Analysis Plot     
     20210301 185315    N/A      N/A   N/A     N/A     N/A  40.0 SSMI16 -15.7 -147.1  -15.7 -147.1  -15.4 -146.6 Analysis Plot     
     20210301 192942    N/A      N/A   N/A     N/A     N/A  40.0 SSMI18 -15.7 -147.1  -15.7 -147.1  -15.3 -146.6 Analysis Plot     
     20210302 025324   -8.2      N/A  30.1%  33.33    8.22  45.0    GMI -15.1 -147.8  -15.1 -147.8  -15.0 -147.5 Analysis Plot     
     20210302 071700   -0.5      N/A  42.5%  33.33     .47  45.0 SSMI15 -15.1 -147.7  -15.1 -147.7  -15.1 -147.6 Analysis Plot     
     20210302 091919    N/A      N/A   N/A     N/A     N/A  50.0 SSMI18 -14.8 -148.1  -14.8 -148.1  -14.8 -147.2 Analysis Plot     
     20210302 184649 -930.0      N/A   N/A     N/A    0.00  55.0 SSMI16 -14.8 -148.4  -14.8 -148.4  -14.5 -147.9 Analysis Plot     
     20210302 191811    3.3      N/A  56.2%  55.55    3.26  55.0 SSMI18 -14.8 -148.4  -14.8 -148.4  -14.5 -147.7 Analysis Plot     
     20210303 020130 -930.0      N/A   N/A     N/A    0.00  55.0    GMI -15.1 -148.9  -15.1 -148.9  -14.8 -148.5 Analysis Plot     
     20210303 031846    N/A      N/A   N/A     N/A     N/A  65.0  AMSR2 -14.7 -148.3  -14.7 -148.3  -14.1 -147.2 Analysis Plot     
     20210303 063002    1.8      N/A  58.9%  44.44    1.79  65.0 SSMI16 -14.7 -148.3  -15.0 -147.8  -15.0 -147.8 Analysis Plot     
     20210303 065850    1.4      N/A  39.7%  22.22    1.41  65.0 SSMI18 -14.7 -148.3  -14.9 -147.7  -14.9 -147.7 Analysis Plot     
     20210303 090635   10.4      N/A  50.7% 111.10   10.45  70.0 SSMI18 -14.8 -148.0  -14.9 -147.4  -14.9 -147.4 Analysis Plot     
     20210303 190618   44.7  >65 kts 100.0%  55.55   29.70  70.0 SSMI18 -14.8 -148.7  -14.8 -148.3  -14.8 -148.3 Analysis Plot     
     20210304 040014   47.4  >65 kts 100.0%  44.44   32.37  85.0  AMSR2 -15.4 -149.3  -15.3 -149.1  -15.3 -149.1 Analysis Plot     
     20210304 061652   18.6      N/A  71.2%  33.33   18.61  85.0 SSMI16 -15.5 -149.6  -15.4 -149.5  -15.4 -149.5 Analysis Plot     
     20210304 064607   19.5      N/A  57.5%  33.33   19.49  85.0 SSMI18 -15.6 -149.6  -15.5 -149.5  -15.5 -149.5 Analysis Plot     
     20210304 085345   20.8  >65 kts  56.2%  33.33   20.77  90.0 SSMI18 -15.6 -149.9  -15.5 -149.5  -15.5 -149.5 Analysis Plot     
     20210304 145240   42.5  >65 kts 109.0%  22.22   27.50  85.0  AMSR2 -15.6 -151.1  -15.5 -151.6  -15.5 -151.6 Analysis Plot     
     20210304 185852   46.1  >65 kts 100.0%  33.33   31.14  85.0 SSMI18 -15.7 -151.8  -15.8 -152.5  -15.8 -152.5 Analysis Plot     
     20210305 030431   54.4  >65 kts 100.0%  33.33   39.36 110.0  AMSR2 -17.2 -155.6  -17.1 -155.8  -17.1 -155.8 Analysis Plot     
     20210305 060349   49.5  >65 kts 100.0%  22.22   34.52 110.0 SSMI16 -17.6 -156.4  -17.8 -156.8  -17.8 -156.8 Analysis Plot     
     20210305 063337   45.7  >65 kts 100.0%  22.22   30.73 110.0 SSMI18 -17.7 -156.6  -17.9 -156.9  -17.9 -156.9 Analysis Plot     
     20210305 084107   42.8  >65 kts 100.0%  33.33   27.78 115.0 SSMI18 -18.1 -157.4  -17.9 -156.9  -17.9 -156.9 Analysis Plot     
     20210305 181103    6.7      N/A  34.2% 133.32    6.74 140.0 SSMI16 -19.8 -161.1  -19.6 -160.9  -19.6 -160.9 Analysis Plot     
     20210305 185327    5.3      N/A  37.0% 166.65    5.31 140.0 SSMI18 -19.9 -161.3  -19.8 -161.1  -19.8 -161.1 Analysis Plot     
     20210306 055753 -920.0      N/A 100.0%  22.22     .40 110.0 SSMI15 -22.1 -165.6  -23.0 -166.2  -23.0 -166.2 Analysis Plot     
     20210306 062235 -930.0      N/A   N/A     N/A    0.00 110.0 SSMI18 -22.3 -166.1  -22.3 -166.1  -23.8 -166.6 Analysis Plot     
     20210306 170026    N/A      N/A   N/A     N/A     N/A  90.0 SSMI15 -25.3 -171.7  -25.3 -171.7  -26.5 -172.1 Analysis Plot     
     20210306 175757    N/A      N/A   N/A     N/A     N/A  90.0 SSMI16 -25.4 -172.0  -25.4 -172.0  -26.5 -172.2 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.