Tropical Depression 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              
     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     
     20220404 082053   -6.4      N/A  76.7%  22.22    6.41  35.0 SSMI17 -16.9 -162.5  -16.9 -162.5  -16.6 -162.6 Analysis Plot     
     20220404 203121    N/A      N/A   N/A     N/A     N/A  45.0 SSMI17 -18.0 -161.0  -18.0 -161.0  -17.7 -161.8 Analysis Plot     
     20220405 032925 -930.0      N/A   N/A     N/A    0.00  45.0  AMSR2 -18.0 -160.4  -18.0 -160.4  -18.4 -160.7 Analysis Plot     
     20220405 061153 -930.0      N/A   N/A     N/A    0.00  45.0 SSMI16 -18.1 -160.4  -18.1 -160.4  -18.3 -161.0 Analysis Plot     
     20220405 080930    N/A      N/A   N/A     N/A     N/A  45.0 SSMI17 -18.4 -161.1  -18.4 -161.1  -18.5 -162.1 Analysis Plot     
     20220405 142201    N/A      N/A   N/A     N/A     N/A  40.0  AMSR2 -19.0 -161.2  -19.2 -162.2  -19.2 -162.2 Analysis Plot     
     20220405 175018   -4.4      N/A  72.6% 111.10    4.45  50.0    GMI -18.9 -161.7  -19.4 -162.0  -19.4 -162.0 Analysis Plot     
     20220405 181909    N/A      N/A   N/A     N/A     N/A  50.0 SSMI16 -18.9 -161.7  -19.1 -162.3  -19.1 -162.3 Analysis Plot     
     20220405 201759   -6.6      N/A  53.4%  88.88    6.63  50.0 SSMI17 -18.9 -162.1  -19.0 -161.9  -19.0 -161.9 Analysis Plot     
     20220406 023323    5.7      N/A   1.4%  55.55    5.74  55.0  AMSR2 -19.7 -162.4  -19.7 -162.4  -19.6 -162.4 Analysis Plot     
     20220406 055850    2.1      N/A   5.5%  66.66    2.10  55.0 SSMI16 -20.0 -162.6  -20.0 -162.6  -19.8 -163.1 Analysis Plot     
     20220406 075635    0.9      N/A  35.6%  44.44     .85  55.0 SSMI17 -20.2 -162.8  -20.2 -162.8  -20.1 -163.5 Analysis Plot     
     20220406 180602    6.1      N/A  49.3%  88.88    6.12  55.0 SSMI16 -21.4 -164.2  -21.4 -164.3  -21.4 -164.3 Analysis Plot     
     20220406 200438    0.6      N/A   8.2% 211.09     .62  55.0 SSMI17 -22.0 -164.2  -22.0 -164.2  -21.7 -164.7 Analysis Plot     
     20220407 031535    N/A      N/A   N/A     N/A     N/A  50.0  AMSR2 -22.9 -164.7  -22.9 -164.7  -22.9 -165.4 Analysis Plot     
     20220407 060643    N/A      N/A   N/A     N/A     N/A  50.0 SSMI16 -23.1 -164.9  -23.1 -164.9  -22.6 -166.0 Analysis Plot     
     20220407 074209   -2.7      N/A   4.1% 188.87    2.71  50.0 SSMI17 -23.2 -164.8  -23.2 -164.8  -23.3 -164.8 Analysis Plot     
     20220407 141048   -5.1      N/A   N/A  188.87    5.09  45.0  AMSR2 -24.2 -165.0  -24.2 -165.0  -24.1 -164.9 Analysis Plot     
     20220407 174257 -930.0      N/A   N/A     N/A    0.00  45.0    GMI -24.6 -165.3  -24.6 -165.3  -24.8 -165.0 Analysis Plot     
     20220407 182355 -930.0      N/A   N/A     N/A    0.00  45.0 SSMI18 -24.6 -165.3  -24.6 -165.3  -24.8 -165.3 Analysis Plot     
     20220407 195113   -3.1      N/A   N/A  188.87    3.14  45.0 SSMI17 -24.7 -165.4  -24.7 -165.4  -24.7 -165.3 Analysis Plot     
     20220408 021935   -2.5      N/A   N/A  222.20    2.45  35.0  AMSR2 -25.3 -166.1  -25.3 -166.1  -25.4 -165.8 Analysis Plot     
     20220408 060325 -930.0      N/A   N/A     N/A    0.00  45.0 SSMI18 -26.0 -166.0  -26.0 -166.0  -25.9 -166.1 Analysis Plot     
     20220408 075127   -1.6      N/A   N/A  166.65    1.59  35.0 SSMI17 -25.6 -166.7  -25.6 -166.7  -25.8 -166.6 Analysis Plot     
     20220408 165018   -0.6      N/A   N/A   11.11     .62  45.0    GMI -26.4 -167.4  -26.4 -167.4  -25.8 -167.4 Analysis Plot     
     20220408 181218   -1.0      N/A   N/A   77.77    1.04  45.0 SSMI18 -26.4 -167.5  -26.4 -167.5  -26.1 -167.4 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.