Tropical Depression 16S

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              
     20200215 114842  -44.8      N/A 100.0%  33.33   29.77  35.0 SSMI15 -17.3  -74.2  -17.3  -74.2  -17.0  -74.2 Analysis Plot     
     20200215 122409  -10.0      N/A  75.3%  33.33   10.01  35.0 SSMI16 -17.5  -74.2  -17.2  -74.2  -17.2  -74.2 Analysis Plot     
     20200215 222534  -40.1      N/A 100.0%  11.11   25.11  45.0    GMI -18.1  -74.0  -18.3  -74.6  -18.3  -74.6 Analysis Plot     
     20200215 224640    N/A      N/A   N/A     N/A     N/A  45.0 SSMI15 -18.1  -74.0  -18.2  -74.4  -18.2  -74.4 Analysis Plot     
     20200215 235509   -2.4      N/A  43.8% 133.32    2.41  45.0 SSMI16 -18.2  -74.0  -18.3  -74.7  -18.3  -74.7 Analysis Plot     
     20200216 115614    7.3      N/A  83.6%  22.22    7.34  75.0 SSMI15 -18.9  -74.5  -18.9  -74.5  -20.2  -75.0 Analysis Plot     
     20200216 120820   26.3  >65 kts  87.7%  33.33   11.29  75.0 SSMI16 -19.0  -74.5  -19.0  -74.5  -20.4  -74.9 Analysis Plot     
     20200216 234201   18.1      N/A 100.0%  22.22    3.06  75.0 SSMI16 -20.7  -74.9  -20.7  -74.9  -20.8  -75.4 Analysis Plot     
     20200217 010911 -930.0      N/A   N/A     N/A    0.00  70.0 SSMI18 -20.3  -75.3  -20.3  -75.3  -20.9  -75.6 Analysis Plot     
     20200217 115822    2.4      N/A   N/A  133.32    2.36  70.0 SSMI16 -20.3  -75.1  -20.3  -75.1  -20.4  -75.3 Analysis Plot     
     20200217 221537 -930.0      N/A   N/A     N/A    0.00  45.0    GMI -20.4  -75.2  -20.4  -75.2  -20.3  -75.2 Analysis Plot     
     20200217 232852   -3.3      N/A   4.1% 222.20    3.34  45.0 SSMI16 -20.4  -75.2  -20.4  -75.2  -20.2  -75.8 Analysis Plot     
     20200218 005601   -3.6      N/A   2.7% 199.98    3.56  45.0 SSMI18 -20.4  -75.2  -20.4  -75.2  -20.3  -75.9 Analysis Plot     
     20200218 114534   -2.7      N/A   N/A  222.20    2.75  35.0 SSMI16 -20.9  -75.4  -20.9  -75.4  -21.1  -75.5 Analysis Plot     
     20200218 130651   -2.7      N/A   N/A  188.87    2.66  35.0 SSMI18 -21.0  -75.3  -21.0  -75.3  -21.0  -75.3 Analysis Plot     
     20200218 231550   -2.8      N/A  16.4% 222.20    2.82  30.0 SSMI16 -21.9  -74.9  -21.9  -74.9  -21.9  -75.5 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.