Hurricane 17L

Passive Microwave (PMW) Intensity Information
Advanced Dvorak Technique (ADT)
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              
     20171010 075800   -7.7      N/A   8.2% 122.21    7.73  45.0 SSMI16  32.0   38.9   32.0   38.9   32.1   38.8 Analysis Plot     
     20171010 183400   -6.8      N/A  17.8%  66.66    6.81  45.0 SSMI16  31.4   38.2   31.4   38.2   31.1   38.2 Analysis Plot     
     20171010 185023   -0.0      N/A   N/A     N/A    0.00  45.0    GMI  31.3   38.1   31.3   38.1   31.2   38.3 Analysis Plot     
     20171011 043435   -6.0      N/A  19.2%  22.22    6.01  45.0    GMI  30.6   37.5   30.6   37.5   30.4   37.4 Analysis Plot     
     20171011 071400   30.4  >65 kts  86.3%  55.55   15.39  55.0 SSMI16  30.4   37.2   30.4   37.2   30.3   37.1 Analysis Plot     
     20171011 175843    9.3      N/A  20.5%  33.33    9.27  55.0    GMI  30.0   36.3   29.8   36.3   29.8   36.3 Analysis Plot     
     20171012 034321 -930.0      N/A   N/A     N/A    0.00  70.0    GMI  30.0   35.7   30.1   35.7   30.1   35.7 Analysis Plot     
     20171012 075100   11.0      N/A  74.0%  33.33   11.00  75.0 SSMI16  30.2   35.7   30.2   35.8   30.2   35.8 Analysis Plot     
     20171012 153711   20.7  >65 kts  45.2%  22.22   20.66  75.0  AMSR2  30.5   35.6   30.5   35.7   30.5   35.7 Analysis Plot     
     20171012 180700   12.2      N/A  69.9%  33.33   12.22  75.0 SSMI16  30.6   35.5   30.3   35.7   30.3   35.7 Analysis Plot     
     20171013 074900    7.6      N/A  12.3%  33.33    7.61  90.0 SSMI16  30.9   34.4   31.0   34.2   31.0   34.2 Analysis Plot     
     20171013 175100   11.5      N/A  49.3%  33.33   11.48  90.0 SSMI16  31.9   32.7   31.8   32.5   31.8   32.5 Analysis Plot     
     20171014 165845   65.5  >85 kts 100.0%  55.55   50.50 100.0    GMI  35.2   25.8   35.0   25.4   35.0   25.4 Analysis Plot     
     20171014 173900   52.7  >65 kts 100.0%  55.55   37.71 100.0 SSMI16  35.0   26.2   35.0   25.2   35.0   25.2 Analysis Plot     
     20171015 160921   12.1      N/A   N/A   22.22   12.12  80.0    GMI  42.2   15.6   41.9   14.8   41.9   14.8 Analysis Plot     
     20171016 001237 -930.0      N/A   N/A     N/A    0.00  75.0    GMI  46.3   12.5   46.3   12.5   47.4   13.6 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.