Tropical Depression 18E


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              
     20211104 135230   -2.5      N/A  12.3%  55.55    2.47  30.0 SSMI17   9.3   89.8    9.3   89.8    9.2   89.8 Analysis Plot     
     20211104 191609   -6.2      N/A   6.8%  77.77    6.23  30.0  AMSR2   9.5   90.4    9.5   90.4   10.1   90.1 Analysis Plot     
     20211104 223807   -1.9      N/A   N/A  177.76    1.89  30.0 SSMI16   9.6   90.6    9.6   90.6    9.6   90.5 Analysis Plot     
     20211105 073224   -4.8      N/A  19.2% 166.65    4.79  30.0  AMSR2   9.7   91.6    9.7   91.6    9.7   91.3 Analysis Plot     
     20211105 123132   -1.7      N/A  13.7%  88.88    1.66  30.0 SSMI16   9.7   91.9    9.7   91.9    9.7   91.3 Analysis Plot     
     20211105 134005   -0.4      N/A   N/A   77.77     .41  30.0 SSMI17   9.6   92.1    9.6   92.1    9.6   91.5 Analysis Plot     
     20211105 195914   -2.1      N/A   N/A   11.11    2.14  30.0  AMSR2   9.1   93.2    9.1   93.2    9.1   93.4 Analysis Plot     
     20211105 221834   -2.4      N/A   N/A  166.65    2.41  30.0 SSMI18   9.1   93.6    9.1   93.6    9.0   93.5 Analysis Plot     
     20211105 222506 -930.0      N/A   N/A     N/A    0.00  30.0 SSMI16   9.1   93.6    9.1   93.6    8.8   93.6 Analysis Plot     
     20211106 011755 -930.0      N/A   N/A     N/A    0.00  30.0 SSMI17   9.0   94.0    9.0   94.0    9.3   94.2 Analysis Plot     
     20211106 025759   -2.2      N/A   N/A  122.21    2.17  30.0 SSMI17   8.9   94.3    8.9   94.3    9.0   94.4 Analysis Plot     
     20211106 081549   -4.6      N/A  45.2%  99.99    4.59  25.0  AMSR2   8.6   95.4    8.6   95.4    8.8   95.1 Analysis Plot     
     20211106 121244   -7.1      N/A  41.1%  33.33    7.07  25.0 SSMI16   8.5   95.9    8.5   95.9    8.6   95.8 Analysis Plot     
     20211107 010426   -2.2      N/A   2.7%  99.99    2.21  30.0 SSMI17   8.2   98.3    8.2   98.3    8.3   98.9 Analysis Plot     
     20211107 024424   -2.3      N/A   N/A   99.99    2.32  30.0 SSMI18   8.3   98.4    8.3   98.4    8.4   98.8 Analysis Plot     
     20211107 115523   -1.8      N/A  23.3%  99.99    1.80  30.0 SSMI18   8.2  100.9    8.2  100.9    7.4  100.9 Analysis Plot     
     20211107 145421   -3.3      N/A  31.5%  44.44    3.32  30.0 SSMI17   8.2  101.2    8.2  101.2    7.4  100.8 Analysis Plot     
     20211107 183149 -930.0      N/A   N/A     N/A    0.00  30.0    GMI   8.4  102.1    8.4  102.1    7.9  102.9 Analysis Plot     
     20211107 194816    N/A      N/A   N/A     N/A     N/A  30.0  AMSR2   8.4  102.3    8.4  102.3    8.9  103.6 Analysis Plot     
     20211107 233908   -3.1      N/A   N/A  222.20    3.14  30.0 SSMI16   8.6  102.9    8.6  102.9    8.9  103.3 Analysis Plot     
     20211108 011457   -3.0      N/A   2.7% 222.20    2.98  30.0 SSMI18   8.7  103.2    8.7  103.2    9.0  103.5 Analysis Plot     
     20211108 060121   -1.7      N/A  15.1%  33.33    1.75  40.0    GMI   9.2  104.5    9.2  104.5    9.2  105.0 Analysis Plot     
     20211108 131950 -930.0      N/A   N/A     N/A    0.00  35.0 SSMI16   9.8  105.8    9.8  105.8   10.1  105.4 Analysis Plot     
     20211108 144102   -1.7      N/A   N/A   44.44    1.71  35.0 SSMI17  10.0  106.3   10.0  106.3   10.6  105.7 Analysis Plot     
     20211108 191414 -930.0      N/A   N/A     N/A    0.00  35.0    GMI  10.3  107.5   10.3  107.5   10.9  108.1 Analysis Plot     
     20211108 203027    N/A      N/A   N/A     N/A     N/A  30.0  AMSR2  10.4  107.8   10.4  107.8   10.8  108.9 Analysis Plot     
     20211108 231849   -2.7      N/A   8.2% 211.09    2.74  30.0 SSMI18  10.6  108.3   10.6  108.3   10.9  108.5 Analysis Plot     
     20211108 232558   -2.5      N/A  31.5% 222.20    2.50  30.0 SSMI16  10.6  108.3   10.6  108.3   10.6  107.9 Analysis Plot     
     20211109 010145   -2.9      N/A   4.1% 199.98    2.93  30.0 SSMI18  10.7  108.6   10.7  108.6   10.9  108.5 Analysis Plot     
     20211109 035626 -930.0      N/A   N/A     N/A    0.00  30.0 SSMI17  10.7  109.3   10.7  109.3    9.3  109.3 Analysis Plot     
     20211109 084620 -930.0      N/A   N/A     N/A    0.00  30.0  AMSR2  11.1  110.4   11.1  110.4   10.6  110.2 Analysis Plot     
     20211109 133215   -2.2      N/A   N/A  177.76    2.18  30.0 SSMI18  11.3  111.1   11.3  111.1   11.2  111.1 Analysis Plot     
     20211109 211402    N/A      N/A   N/A     N/A     N/A  25.0  AMSR2  11.6  113.0   11.6  113.0   11.6  113.0 Analysis Plot     
     20211110 020419   -2.4      N/A   N/A  144.43    2.40  25.0 SSMI17  11.7  113.9   11.7  113.9   12.4  114.0 Analysis Plot     
     20211110 034341   -2.7      N/A   4.1% 166.65    2.74  25.0 SSMI17  11.9  114.1   11.9  114.1   12.4  114.0 Analysis Plot     
     20211110 092859   -0.8      N/A   5.5% 111.10     .77  25.0  AMSR2  11.8  115.8   11.8  115.8   11.9  116.3 Analysis Plot     
     20211110 130405 -930.0      N/A   N/A     N/A    0.00  25.0 SSMI18  11.8  116.3   11.8  116.3   11.7  116.0 Analysis Plot     
     20211110 154741    N/A      N/A   N/A     N/A     N/A  25.0 SSMI17  11.7  116.9   11.7  116.9   11.9  117.9 Analysis Plot     
     20211110 190502   -9.8      N/A   N/A   22.22    9.78  25.0    GMI  11.7  117.8   11.7  117.8   11.7  118.3 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.