Tropical Depression 08L

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              
     20200723 080357    N/A      N/A   N/A     N/A     N/A  25.0  AMSR2  26.0   89.9   26.0   89.9   26.3   89.2 Analysis Plot     
     20200723 112258  -33.8      N/A  90.4%  44.44   18.81  25.0 SSMI16  26.1   90.2   26.1   90.2   25.9   89.9 Analysis Plot     
     20200723 125504   -3.9      N/A   N/A   22.22    3.86  25.0    GMI  26.2   90.5   26.2   90.5   26.0   90.6 Analysis Plot     
     20200723 222846   -6.8      N/A  23.3%  33.33    6.81  30.0 SSMI18  26.1   90.8   26.1   90.8   25.9   91.3 Analysis Plot     
     20200723 225843 -930.0      N/A   N/A     N/A    0.00  30.0 SSMI16  26.1   90.8   26.1   90.8   25.8   90.9 Analysis Plot     
     20200724 101329 -930.0      N/A   N/A     N/A    0.00  35.0 SSMI15  26.8   92.6   26.8   92.6   26.2   92.0 Analysis Plot     
     20200724 122155 -930.0      N/A   N/A     N/A    0.00  35.0 SSMI18  26.8   92.7   26.8   92.7   26.9   93.6 Analysis Plot     
     20200724 194443   -8.4      N/A  28.8%  88.88    8.43  40.0  AMSR2  27.4   93.8   27.4   93.8   27.3   93.8 Analysis Plot     
     20200725 124532   22.4  >65 kts  53.4%  88.88   22.40  60.0    GMI  27.0   96.3   27.1   96.2   27.1   96.2 Analysis Plot     
     20200725 222901 -930.0      N/A   N/A     N/A    0.00  75.0 SSMI15  26.8   97.5   26.8   97.5   26.9   97.3 Analysis Plot     
     20200726 002053   47.9  >65 kts 100.0%  66.66   32.95  75.0 SSMI16  26.7   97.5   26.6   97.5   26.6   97.5 Analysis Plot     
     20200726 011356   46.6  >65 kts 100.0%  77.77   31.55  75.0 SSMI18  26.7   97.7   26.8   97.8   26.8   97.8 Analysis Plot     
     20200726 122439    4.5      N/A  11.0% 133.32    4.49  60.0 SSMI16  26.1   99.2   26.1   99.2   26.7   99.3 Analysis Plot     
     20200726 132345    6.3      N/A   1.4%  77.77    6.32  60.0 SSMI18  26.1   99.3   26.1   99.3   26.5   99.5 Analysis Plot     
     20200726 221122   -4.2      N/A  19.2%  44.44    4.19  45.0 SSMI15  25.6  100.5   25.6  100.5   25.9  100.1 Analysis Plot     
     20200727 001008   -1.1      N/A   5.5% 111.10    1.13  45.0 SSMI16  25.5  100.5   25.5  100.5   25.0  100.7 Analysis Plot     
     20200727 010056   -4.1      N/A   N/A   77.77    4.10  45.0 SSMI18  25.5  100.6   25.5  100.6   25.0  101.1 Analysis Plot     
     20200727 042019   53.6  >65 kts 100.0%  44.44   38.61  80.0 SSMI18  21.7  157.5   21.7  157.5   22.1  157.4 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.