Tropical Storm 15L

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              
     20181009 182446   -3.8      N/A  19.2% 188.87    3.83  35.0 SSMI16  10.7   30.3   10.7   30.3   10.6   30.6 Analysis Plot     
     20181010 070150   -2.7      N/A  35.6%  77.77    2.73  40.0    GMI  11.9   31.3   12.0   30.8   12.0   30.8 Analysis Plot     
     20181010 083200  -12.6      N/A  21.9%  33.33   12.61  45.0 SSMI18  12.0   31.0   12.0   31.0   12.1   30.9 Analysis Plot     
     20181010 151434    2.8      N/A   N/A   44.44    2.80  55.0  AMSR2  12.6   31.6   12.6   31.6   12.6   31.5 Analysis Plot     
     20181010 183556    3.8      N/A   9.6% 188.87    3.82  55.0 SSMI16  12.8   31.8   12.8   31.8   12.4   32.3 Analysis Plot     
     20181010 211218    3.0      N/A  11.0% 155.54    3.01  55.0 SSMI17  13.0   32.2   13.0   32.2   12.5   32.3 Analysis Plot     
     20181011 080753    4.4      N/A  11.0% 188.87    4.36  55.0 SSMI16  13.9   33.2   13.9   33.2   13.4   33.1 Analysis Plot     
     20181011 105734 -930.0      N/A   N/A     N/A    0.00  55.0 SSMI17  14.2   33.4   14.2   33.4   14.0   33.5 Analysis Plot     
     20181011 155801    N/A      N/A   N/A     N/A     N/A  50.0  AMSR2  14.1   34.0   14.1   34.0   14.1   34.0 Analysis Plot     
     20181011 175825    N/A      N/A   N/A     N/A     N/A  50.0 SSMI16  14.2   34.2   14.2   34.2   13.9   34.1 Analysis Plot     
     20181011 202527   -4.2      N/A  12.3% 222.20    4.21  45.0 SSMI18  14.4   34.7   14.4   34.7   14.4   34.7 Analysis Plot     
     20181011 205916   -4.3      N/A   9.6% 222.20    4.35  45.0 SSMI17  14.4   34.8   14.4   34.8   14.5   34.7 Analysis Plot     
     20181012 041118   -1.1      N/A  20.5%  33.33    1.10  45.0  AMSR2  15.0   35.7   15.0   35.7   15.1   34.9 Analysis Plot     
     20181012 065248   -0.5      N/A  23.3%  22.22     .50  45.0    GMI  15.1   36.0   15.1   36.0   16.0   35.9 Analysis Plot     
     20181012 074043 -930.0      N/A   N/A     N/A    0.00  45.0 SSMI16  15.1   35.5   15.1   35.5   16.0   35.7 Analysis Plot     
     20181012 101000 -930.0      N/A   N/A     N/A    0.00  45.0 SSMI17  15.2   35.5   15.2   35.5   16.5   35.4 Analysis Plot     
     20181012 201322   -2.5      N/A   N/A  155.54    2.47  35.0 SSMI18  16.4   37.3   16.4   37.3   16.5   37.4 Analysis Plot     
     20181012 204608 -930.0      N/A   N/A     N/A    0.00  35.0 SSMI17  16.4   37.4   16.4   37.4   16.0   37.3 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.