Tropical Depression 16W


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              
     20210810 140013    N/A      N/A   N/A     N/A     N/A  25.0  AMSR2  12.2 -178.7   12.2 -178.7   11.5 -179.3 Analysis Plot     
     20210810 171935    N/A      N/A   N/A     N/A     N/A  25.0 SSMI18  12.2 -178.4   12.2 -178.4   12.1 -179.1 Analysis Plot     
     20210810 174534  -16.2      N/A 100.0%  33.33    1.18  25.0 SSMI16  12.2 -178.4   12.2 -178.4   12.0 -179.2 Analysis Plot     
     20210810 192644    N/A      N/A   N/A     N/A     N/A  25.0 SSMI17  12.3 -178.2   12.3 -178.2   12.1 -178.3 Analysis Plot     
     20210811 063459   -2.8      N/A   N/A   33.33    2.84  30.0 SSMI18  12.5 -176.4   12.5 -176.4   12.5 -176.6 Analysis Plot     
     20210811 085046 -930.0      N/A   N/A     N/A    0.00  30.0 SSMI17  12.5 -176.1   12.5 -176.1   12.4 -176.1 Analysis Plot     
     20210812 013325   -3.5      N/A   N/A   33.33    3.51  25.0  AMSR2  12.1 -173.8   12.1 -173.8   12.6 -173.6 Analysis Plot     
     20210812 050638   -4.5      N/A   6.8% 211.09    4.55  25.0 SSMI18  12.1 -173.3   12.1 -173.3   12.6 -172.9 Analysis Plot     
     20210812 053610 -930.0      N/A   N/A     N/A    0.00  25.0 SSMI16  12.1 -173.2   12.1 -173.2   12.3 -172.7 Analysis Plot     
     20210812 072143   -1.7      N/A   9.6% 199.98    1.68  25.0 SSMI17  12.8 -172.6   12.8 -172.6   12.5 -172.9 Analysis Plot     
     20210812 134906 -930.0      N/A   N/A     N/A    0.00  30.0  AMSR2  12.6 -170.9   12.6 -170.9   12.9 -170.4 Analysis Plot     
     20210812 183500   -0.6      N/A   8.2%  66.66     .61  30.0 SSMI18  12.6 -170.2   12.6 -170.2   12.4 -170.1 Analysis Plot     
     20210812 191854    N/A      N/A   N/A     N/A     N/A  30.0 SSMI16  12.6 -170.1   12.6 -170.1   12.3 -170.2 Analysis Plot     
     20210812 205642   -4.3      N/A  16.4% 266.64    4.25  30.0 SSMI17  12.6 -169.4   12.6 -169.4   12.6 -169.5 Analysis Plot     
     20210813 021618  -20.9      N/A 100.0%  11.11    5.89  35.0  AMSR2  12.7 -168.2   12.7 -168.2   12.2 -167.3 Analysis Plot     
     20210813 045342 -930.0      N/A   N/A     N/A    0.00  35.0 SSMI18  12.7 -167.7   12.7 -167.7   12.9 -167.5 Analysis Plot     
     20210813 052308   -2.2      N/A   N/A  266.64    2.17  35.0 SSMI16  12.7 -167.6   12.7 -167.6   12.5 -167.5 Analysis Plot     
     20210813 070805 -930.0      N/A   N/A     N/A    0.00  35.0 SSMI17  12.6 -167.2   12.6 -167.2   12.1 -167.4 Analysis Plot     
     20210813 143059    N/A      N/A   N/A     N/A     N/A  35.0  AMSR2  12.8 -165.5   12.8 -165.5   12.9 -166.0 Analysis Plot     
     20210813 182212 -930.0      N/A   N/A     N/A    0.00  35.0 SSMI18  12.8 -164.9   12.8 -164.9   12.4 -164.5 Analysis Plot     
     20210813 184136   -0.3      N/A  17.8%  22.22     .30  35.0 SSMI16  12.8 -164.8   12.8 -164.8   12.6 -165.1 Analysis Plot     
     20210813 204317    N/A      N/A   N/A     N/A     N/A  35.0 SSMI17  12.7 -164.4   12.7 -164.4   12.4 -164.8 Analysis Plot     
     20210814 030009 -930.0      N/A   N/A     N/A    0.00  30.0  AMSR2  12.5 -162.6   12.9 -162.4   12.9 -162.4 Analysis Plot     
     20210814 151417   -0.1      N/A   6.8% 233.31     .12  35.0  AMSR2  12.3 -159.4   12.3 -159.4   12.8 -159.9 Analysis Plot     
     20210815 063015 -930.0      N/A   N/A     N/A    0.00  30.0 SSMI16  12.5 -155.5   12.5 -155.5   12.9 -155.9 Analysis Plot     
     20210815 072642   -0.4      N/A   N/A   11.11     .39  30.0 SSMI18  12.6 -155.3   12.6 -155.3   13.0 -155.6 Analysis Plot     
     20210815 093940   -0.7      N/A   N/A   11.11     .70  30.0 SSMI17  12.8 -153.9   12.8 -153.9   13.1 -154.2 Analysis Plot     
     20210815 155831 -930.0      N/A   N/A     N/A    0.00  25.0  AMSR2  12.8 -153.2   12.8 -153.2   14.2 -153.1 Analysis Plot     
     20210815 193014   -1.9      N/A   N/A  255.53    1.90  25.0 SSMI18  12.9 -152.6   12.9 -152.6   12.8 -152.4 Analysis Plot     
     20210815 194738 -930.0      N/A   N/A     N/A    0.00  25.0 SSMI16  12.9 -152.5   12.9 -152.5   13.4 -152.7 Analysis Plot     
     20210815 215627   -0.2      N/A   N/A   66.66     .24  25.0 SSMI17  13.0 -152.1   13.0 -152.1   12.9 -151.7 Analysis Plot     
     20210816 061707   -1.3      N/A   N/A  144.43    1.34  25.0 SSMI16  13.1 -150.0   13.1 -150.0   13.9 -149.7 Analysis Plot     
     20210816 191836 -930.0      N/A   N/A     N/A    0.00  20.0 SSMI18  13.5 -146.5   13.5 -146.5   13.7 -146.3 Analysis Plot     
     20210816 193803 -930.0      N/A   N/A     N/A    0.00  20.0 SSMI16  12.9 -146.0   12.9 -146.0   12.2 -146.3 Analysis Plot     
     20210817 033110   -3.2      N/A   6.8%  99.99    3.21  20.0  AMSR2  13.4 -144.4   13.4 -144.4   13.3 -144.1 Analysis Plot     
     20210817 090738   -1.1      N/A   N/A  144.43    1.08  20.0 SSMI18  13.5 -143.5   13.5 -143.5   13.6 -143.1 Analysis Plot     
     20210817 111905 -930.0      N/A   N/A     N/A    0.00  20.0 SSMI17  13.5 -143.0   13.5 -143.0   13.9 -143.0 Analysis Plot     
     20210821 044716   -2.4      N/A  16.4%  22.22    2.41  45.0  AMSR2  22.1 -127.6   22.1 -127.6   21.8 -128.3 Analysis Plot     
     20210821 083426   -5.4      N/A  54.8%  22.22    5.36  45.0 SSMI16  22.2 -127.6   22.2 -127.6   22.1 -127.6 Analysis Plot     
     20210821 095754   -2.4      N/A  34.2%  33.33    2.37  45.0 SSMI18  22.4 -127.4   22.4 -127.4   22.1 -127.6 Analysis Plot     
     20210821 120643  -10.4      N/A   N/A   44.44   10.37  45.0 SSMI17  22.7 -127.2   22.7 -127.2   22.4 -127.7 Analysis Plot     
     20210821 165706   -4.5      N/A  16.4%  44.44    4.54  50.0  AMSR2  23.5 -126.6   23.5 -126.6   23.6 -126.7 Analysis Plot     
     20210821 213454 -930.0      N/A   N/A     N/A    0.00  50.0 SSMI18  23.9 -126.4   23.9 -126.4   24.5 -125.4 Analysis Plot     
     20210821 220146   -1.6      N/A  15.1% 122.21    1.62  50.0 SSMI16  23.9 -126.4   23.9 -126.4   24.1 -125.6 Analysis Plot     
     20210821 234418   -4.1      N/A  21.9% 188.87    4.06  50.0 SSMI17  24.1 -126.3   24.1 -126.3   24.6 -126.1 Analysis Plot     
     20210822 082123   -5.3      N/A  12.3% 233.31    5.31  35.0 SSMI16  25.5 -125.3   25.5 -125.3   25.4 -125.7 Analysis Plot     
     20210822 094509   -4.9      N/A   4.1% 244.42    4.91  35.0 SSMI18  25.7 -125.2   25.7 -125.2   25.7 -125.5 Analysis Plot     
     20210822 115320   -5.1      N/A   N/A  177.76    5.12  35.0 SSMI17  26.2 -125.1   26.2 -125.1   25.8 -125.2 Analysis Plot     
     20210822 173820   -2.5      N/A   N/A   44.44    2.46  35.0  AMSR2  27.6 -125.3   27.6 -125.3   27.4 -124.7 Analysis Plot     
     20210822 214821   -4.7      N/A   2.7% 233.31    4.66  35.0 SSMI16  28.1 -125.1   28.1 -125.1   28.2 -124.9 Analysis Plot     
     20210822 233041   -4.5      N/A   8.2% 233.31    4.49  35.0 SSMI17  28.6 -125.2   28.6 -125.2   28.6 -125.1 Analysis Plot     
     20210823 043723   -5.6      N/A   N/A  188.87    5.55  30.0  AMSR2  30.3 -126.1   30.3 -126.1   30.7 -125.6 Analysis Plot     
     20210823 080813 -930.0      N/A   N/A     N/A    0.00  25.0 SSMI16  31.8 -125.9   31.8 -125.9   31.8 -126.0 Analysis Plot     
     20210823 093222 -930.0      N/A   N/A     N/A    0.00  25.0 SSMI18  32.2 -126.2   32.2 -126.2   31.9 -126.1 Analysis Plot     
     20210823 113951 -930.0      N/A   N/A     N/A    0.00  25.0 SSMI17  33.0 -126.7   33.0 -126.7   32.8 -126.6 Analysis Plot     
     20210823 210951   -2.6      N/A   N/A  222.20    2.59  25.0 SSMI18  36.7 -129.0   36.7 -129.0   36.7 -128.8 Analysis Plot     
     20210823 213527   -2.9      N/A   9.6% 222.20    2.88  25.0 SSMI16  36.8 -129.1   36.8 -129.1   36.7 -129.1 Analysis Plot     
     20210823 231630   -0.6      N/A   3.0% 277.75     .65  25.0 SSMI17  37.5 -129.6   37.5 -129.6   37.4 -129.6 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.