Tropical Depression 24W

Passive Microwave (PMW) Intensity Information
Advanced Dvorak Technique
Version 9.1


       --Overpass--              --ARCHER--   Ring  Ring            Eye              BT   -Forecast-  
       Date    Time      Sat     Lat    Lon   Diam   Pct  TbDiff   Score  Meaning   Vmax  Lat    Lon                 
     20241103 164729     AMSR2   12.4  136.1   N/A   N/A     N/A     N/A      N/A   35.0  11.8  135.2 Analysis Plot     
     20241103 193009  SSMISF18   11.4  134.2    46  100%   25.91  -40.91      N/A   40.0  11.5  134.0 Analysis Plot     
     20241103 215329  SSMISF16   11.9  133.7    46  100%   28.05  -43.05      N/A   40.0  11.8  133.5 Analysis Plot     
     20241104 063953  SSMISF18   13.4  131.1    34  100%   27.00  -42.00      N/A   50.0  13.3  131.7 Analysis Plot     
     20241104 090300  SSMISF16   13.7  130.7    46  100%   29.62   44.62  >65 kts   55.0  13.7  130.7 Analysis Plot     
     20241104 090923  SSMISF17   13.8  130.8    46  100%   30.79   45.79  >65 kts   55.0  14.0  130.3 Analysis Plot     
     20241104 173007     AMSR2   15.4  128.7    23  100%   25.94   40.94  >65 kts   65.0  15.4  128.7 Analysis Plot     
     20241104 191522  SSMISF18   15.5  128.5    46   79%   12.77   12.77      N/A   70.0  15.4  128.6 Analysis Plot     
     20241104 210133       GMI   15.9  128.1    12   88%   16.14   31.14  >65 kts   70.0  15.5  128.5 Analysis Plot     
     20241104 213822  SSMISF16   15.8  127.9    12   74%   11.54   11.54      N/A   70.0  15.8  128.2 Analysis Plot     
     20241106 050500     AMSR2   18.0  124.4    46  100%   23.24   38.24  >65 kts   90.0  18.3  124.3 Analysis Plot     
     20241106 074944       GMI   18.1  124.4    34   57%   20.18   20.18  >65 kts   90.0  18.1  124.3 Analysis Plot     
     20241106 075531  SSMISF18   18.2  124.4    34   54%   18.80   18.80      N/A  100.0  18.1  124.2 Analysis Plot     
     20241106 171649     AMSR2   18.3  123.7    46  100%   45.84   60.84  >85 kts  110.0  18.3  123.3 Analysis Plot     
     20241106 211242       GMI   18.4  123.4    34  100%   25.56   40.56  >65 kts  115.0  18.3  123.3 Analysis Plot     
     20241107 074107  SSMISF18   18.7  122.3     5  100%   36.56   51.56  >65 kts  125.0  18.6  122.0 Analysis Plot     
     20241107 101000  SSMISF17   18.7  122.0    34  100%   44.97   59.97  >65 kts  125.0  18.5  121.8 Analysis Plot     
     20241107 201420  SSMISF18   18.3  120.1    34    7%    5.83    5.83      N/A  100.0  18.6  119.8 Analysis Plot     
     20241107 224313  SSMISF17   18.3  119.7    79   31%   18.80   18.80      N/A  100.0  18.6  119.3 Analysis Plot     
     20241108 075949       GMI   18.4  117.8    57   39%   21.49   21.49  >65 kts   90.0  18.2  117.8 Analysis Plot     
     20241108 095147  SSMISF16   18.4  117.3    57  100%   33.79   48.79  >65 kts   90.0  18.5  117.3 Analysis Plot     
     20241108 095610  SSMISF17   18.4  117.3    57  100%   30.04   45.04  >65 kts   90.0  18.6  117.1 Analysis Plot     
     20241108 200129  SSMISF18   18.7  115.4    68  100%   46.30   61.30  >85 kts  100.0  18.7  115.3 Analysis Plot     
     20241108 222502  SSMISF16   18.7  115.1    46  100%   45.99   60.99  >85 kts  100.0  18.8  115.1 Analysis Plot     
     20241108 222917  SSMISF17   18.6  115.1    46  100%   44.52   59.52  >65 kts  100.0  18.8  115.0 Analysis Plot     
     20241109 053623     AMSR2   19.0  114.3    46  100%   34.89   49.89  >65 kts  100.0  19.0  114.3 Analysis Plot     
     20241109 071618       GMI   18.9  113.9   N/A   N/A     N/A     N/A      N/A  110.0  18.9  113.9 Analysis Plot     
     20241109 174813     AMSR2   19.2  113.5    34   69%   19.77   19.77      N/A  105.0  19.1  113.1 Analysis Plot     
     20241109 204052       GMI   19.2  113.4    34   22%   16.54   16.54      N/A  105.0  19.1  113.1 Analysis Plot     
     20241110 084216  SSMISF18   18.9  113.0    12   99%   13.03   28.03  >65 kts   90.0  18.6  112.8 Analysis Plot     
     20241110 183100     AMSR2   17.9  111.8   N/A   N/A     N/A     N/A      N/A   40.0  17.9  111.8 Analysis Plot     
     20241111 072830       GMI   16.1  110.7   N/A   N/A     N/A     N/A      N/A   35.0  16.1  111.0 Analysis Plot     
     20241111 082651  SSMISF18   16.4  110.7   223   14%    1.12   -1.12      N/A   35.0  16.0  110.4 Analysis Plot     
     20241111 105425  SSMISF17   16.0  110.7   212    8%    0.30   -0.30      N/A   35.0  15.7  110.2 Analysis Plot     
     20241111 210209  SSMISF18   14.9  109.8   N/A   N/A     N/A     N/A      N/A   35.0  14.5  109.5 Analysis Plot     
     20241111 232657  SSMISF16   14.7  109.6   135   17%    0.76   -0.76      N/A   35.0  14.3  109.3 Analysis Plot     
     20241111 233010  SSMISF17   14.7  109.6   146    8%    0.84   -0.84      N/A   35.0  14.2  109.2 Analysis Plot     
     20241112 060549     AMSR2   14.0  109.2   N/A   N/A     N/A     N/A      N/A   30.0  13.8  108.8 Analysis Plot     
     20241112 081300  SSMISF18   14.3  109.0    57   12%    2.93   -2.93      N/A   30.0  14.0  109.1 Analysis Plot     
     20241112 103950  SSMISF17   14.0  109.0   N/A   N/A     N/A     N/A      N/A   30.0  13.9  108.9 Analysis Plot     
     20241112 200727       GMI   13.8  106.9   N/A   N/A     N/A     N/A      N/A   20.0  14.0  107.5 Analysis Plot     
     20241112 204831  SSMISF18   13.5  106.6    12   N/A    0.42   -0.42      N/A   20.0  13.9  107.3 Analysis Plot     
     20241112 231540  SSMISF17   13.9  106.9   201   N/A    1.06   -1.06      N/A   20.0  13.9  106.9 Analysis Plot     
     20241113 073827       GMI   13.9  105.1   N/A   N/A     N/A     N/A      N/A   15.0  14.0  105.0 Analysis Plot

Legend

  - Overpass Date/Time are determined from satellite overpass of targeted TC (position determined from Best Track Lat/Lon position). Date is YYYYMMDD and time in HHMMSS (UTC).

  - Forecast (Best Track) and ARCHER positions (deg) of the TC center at overpass day/time. Positive/Negative: Latitude = North/South Hemisphere; Longitude = Eastern/Western Hemisphere.

  - BT Vmax is the concurrent ATCF Best Track (BT) wind speed intensity estimate (Vmax) value from either NOAA/National Hurricane Center (NHC) (North Atlantic and Northeast Pacific), NOAA/Central Pacific Hurricane Center (CPHC) (North-central Pacific) or Joint Typhoon Warning Center (JTWC) (Northwest Pacific, Indian Ocean, or Southwest Pacific).

  - Sat is the satellite descriptor providing the overpass. Currently the satellites used are the DMSP/SSMIS-16/17/18, GPM/GMI, and GCOM/AMSR2.

  - Ring Diam (km) indicates the estimated surface eyewall diameter if one is analyzed in the PMW imagery. The value listed is the average PMW-estimated inner eyewall edge diameter minus 10 km for eyewall slope. N/A indicates no appreciable eyewall is analyzed.

  - Ring Pct is the percentage of the analyzed "ring" (eyewall inner boundary) that is 1) colder than the eye Tb (the "hot spot" -- warmest eye pixel) by at least 20K, or 2) that is colder than 232K and colder than the eye Tb by 10K, whichever is greater. Values are red if Ring % ≤65,yellow/brown if Ring % ≤85 and green if Ring % >85. N/A indicates no appreciable eyewall is analyzed. A value over 85% is used in the intensity score by adding 15 points to it.

  - TbDiff is the difference between the warmest eye pixel and the warmest pixel on the eyewall. This value is used in the Intensity Score. N/A indicates no appreciable eyewall is analyzed.

  - Eye Score values are based on the strength and organization of the convective/eyewall signatures in the PMW imagery, and based on the ARCHER center location. They normally range from 0 to 100 with empirically-determined thresholds related to intensity (Vmax) in the "Meaning" column (≥20 suggests ≥65kts; ≥60 suggests ≥85kts). Scores are listed as negative, and not used by the ADT, when the NHC, CPHC, or JTWC Best Track Vmax is <55 kts in order to filter out occasional "false eye" cases. A value of -920 is used when the warmest eye pixel is <200K to prevent false positives; -930 means edge of overpass and <85% of eyewall is captured and therefore can't fully be analyzed.