Tropical Storm 16L

Passive Microwave (PMW) Intensity Information
Hurricane Intensity Estimation (HIE) Algorithm
Version 8.2.1
 

         Overpass     Inten           Ring    Ring          Wind           Forecast        Final        Target  
       Date    Time   Score  Meaning   Pct    Diam  BTdiff   Est   Sat    Lat    Lon    Lat    Lon    Lat    Lon              
     20171005 094649  -10.9      N/A  26.0%  55.55   10.87  30.0    GMI  13.4   83.3   13.4   83.3   13.7   83.5 Analysis Plot     
     20171005 111600   -8.3      N/A  24.7%  44.44    8.29  30.0 SSMI16  13.4   83.3   13.4   83.3   13.7   83.5 Analysis Plot     
     20171005 184448   -2.3      N/A   N/A   55.55    2.28  35.0  AMSR2  14.5   84.0   14.5   84.0   14.4   84.0 Analysis Plot     
     20171005 212000   -8.6      N/A   8.2% 111.10    8.61  35.0 SSMI16  14.7   84.2   14.7   84.2   14.8   84.3 Analysis Plot     
     20171006 065816 -930.0      N/A   N/A     N/A    0.00  40.0  AMSR2  16.5   85.0   16.5   85.0   16.0   84.1 Analysis Plot     
     20171006 110300   -5.1      N/A  30.1% 177.76    5.08  40.0 SSMI16  17.0   85.1   17.0   85.1   17.5   84.6 Analysis Plot     
     20171006 210700   -5.1      N/A  45.2%  88.88    5.11  45.0 SSMI16  19.9   85.5   19.9   85.5   20.4   85.6 Analysis Plot     
     20171007 103000    3.0      N/A  43.8% 133.32    2.98  70.0 SSMI16  24.6   87.1   24.7   87.3   24.7   87.3 Analysis Plot     
     20171007 183726 -930.0      N/A   N/A     N/A    0.00  80.0  AMSR2  27.6   88.9   27.6   88.9   27.1   89.0 Analysis Plot     
     20171007 225601    1.0      N/A   1.4%  33.33    1.03  80.0    GMI  28.9   89.2   28.7   89.0   28.7   89.0 Analysis Plot     
     20171008 084034 -930.0      N/A   N/A     N/A    0.00  60.0    GMI  31.4   88.4   31.4   88.4   30.9   89.3 Analysis Plot     
     20171008 192117   -0.9      N/A   N/A   11.11     .91  40.0  AMSR2  34.3   86.4   34.3   86.4   34.1   87.4 Analysis Plot     
     20171008 212200 -930.0      N/A   N/A     N/A    0.00  40.0 SSMI16  35.0   86.0   35.0   86.0   34.5   87.0 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.