Tropical Storm 30Y_07

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              
     20200821 214635   -1.3      N/A  13.7% 211.09    1.31  30.0 SSMI16  22.5 -123.3   22.5 -123.3   22.9 -122.5 Analysis Plot     
     20200822 081446   -2.1      N/A  22.1% 133.32    2.06  45.0 SSMI16  24.5 -123.4   24.5 -123.4   23.9 -123.4 Analysis Plot     
     20200822 231447    1.2      N/A  19.2% 199.98    1.20  55.0 SSMI16  25.8 -123.3   25.8 -123.3   25.7 -123.2 Analysis Plot     
     20200823 050653    N/A      N/A   N/A     N/A     N/A  55.0  AMSR2  26.3 -124.1   26.3 -124.1   26.3 -124.1 Analysis Plot     
     20200823 080140    4.6      N/A  12.3%  66.66    4.61  55.0 SSMI16  26.3 -124.1   26.3 -124.1   26.5 -124.6 Analysis Plot     
     20200823 171407    6.3      N/A  31.5% 188.87    6.27  60.0  AMSR2  27.0 -125.3   27.2 -125.1   27.2 -125.1 Analysis Plot     
     20200823 212024    1.9      N/A  32.9% 155.54    1.87  60.0 SSMI16  27.1 -125.3   27.1 -125.5   27.1 -125.5 Analysis Plot     
     20200824 074835   14.6      N/A  43.8%  77.77   14.59  65.0 SSMI16  27.7 -126.3   27.7 -126.3   27.9 -126.6 Analysis Plot     
     20200824 210710   16.2      N/A  35.6%  44.44   16.18  75.0 SSMI16  28.8 -125.7   28.8 -125.7   28.8 -126.0 Analysis Plot     
     20200824 221745   46.1  >65 kts 100.0%  77.77   31.10  75.0 SSMI18  28.9 -125.6   28.8 -125.9   28.8 -125.9 Analysis Plot     
     20200825 073527   25.2  >65 kts  47.9%  55.55   25.20  80.0 SSMI16  29.6 -125.3   29.8 -125.4   29.8 -125.4 Analysis Plot     
     20200825 103617   25.2  >65 kts  12.3%  66.66   25.19  80.0 SSMI18  29.9 -125.3   30.0 -125.3   30.0 -125.3 Analysis Plot     
     20200825 221456   18.0      N/A  20.5%  99.99   18.04  80.0 SSMI18  31.7 -124.4   31.8 -124.7   31.8 -124.7 Analysis Plot     
     20200826 215114 -930.0      N/A   N/A     N/A    0.00  70.0 SSMI18  37.7 -125.4   37.7 -125.4   37.7 -124.3 Analysis Plot     
     20200827 083239    0.5      N/A   N/A  311.08     .52  60.0 SSMI18  42.1 -126.0   42.1 -126.0   42.0 -125.6 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.