Tropical Depression 05S

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                 
     20251118 085436  SSMISF17   -9.8  131.1    34   22%   21.73  -21.73      N/A   35.0  -9.8  131.2 Analysis Plot     
     20251118 185309  SSMISF18   -9.9  131.1   N/A   N/A     N/A     N/A      N/A   45.0  -9.8  131.9 Analysis Plot     
     20251119 060827       GMI   -9.4  131.9   N/A   N/A     N/A     N/A      N/A   50.0  -9.5  132.8 Analysis Plot     
     20251119 162235     AMSR2   -9.5  132.8    46   65%   12.93   12.93      N/A   60.0  -9.5  132.8 Analysis Plot     
     20251119 212830  SSMISF17   -9.9  133.1    68  100%   31.73   46.73  >65 kts   60.0  -9.7  133.0 Analysis Plot     
     20251120 043841     AMSR2  -10.1  133.1   N/A   N/A     N/A     N/A      N/A   65.0 -10.0  133.2 Analysis Plot     
     20251120 184543       GMI  -10.4  132.6   N/A   N/A     N/A     N/A      N/A   60.0 -10.3  133.1 Analysis Plot     
     20251120 211354  SSMISF17  -10.5  132.8    90   11%    5.04    5.04      N/A   60.0 -10.7  132.7 Analysis Plot     
     20251121 161150     AMSR2  -11.5  131.9    12  100%   28.32   43.32  >65 kts   70.0 -11.5  131.8 Analysis Plot     
     20251121 180355       GMI  -11.6  131.8    12  100%   25.97   40.97  >65 kts   70.0 -11.5  131.8 Analysis Plot     
     20251121 210005  SSMISF17  -11.9  131.6    12  100%   20.86   35.86  >65 kts   70.0 -11.8  131.5 Analysis Plot     
     20251122 053623       GMI  -12.1  131.0   N/A   N/A     N/A     N/A      N/A   80.0 -12.0  131.0 Analysis Plot     
     20251122 165400     AMSR2  -12.4  130.2    12  100%   39.65   54.65  >65 kts   85.0 -12.4  130.2 Analysis Plot     
     20251122 193834  SSMISF18  -12.7  130.1    12  100%   39.18   54.18  >65 kts   90.0 -12.6  129.6 Analysis Plot     
     20251122 204714  SSMISF17  -12.7  129.7    23  100%   49.12   64.12  >85 kts   90.0 -12.7  129.5 Analysis Plot     
     20251123 050839     AMSR2  -13.2  129.3    12  100%   46.49   61.49  >85 kts   90.0 -13.2  129.3 Analysis Plot     
     20251123 103735  SSMISF16  -13.4  129.1    12  100%   44.67   59.67  >65 kts   95.0 -13.6  128.9 Analysis Plot     
     20251123 181448       GMI  -13.8  128.6    12  100%   41.57   56.57  >65 kts   95.0 -13.8  128.6 Analysis Plot     
     20251124 080029  SSMISF18  -14.2  127.9    12  100%   15.32   30.32  >65 kts  110.0 -14.3  127.9 Analysis Plot     
     20251124 102318  SSMISF16  -14.5  127.8   N/A   N/A     N/A     N/A      N/A  110.0 -14.3  127.8 Analysis Plot     
     20251124 173312       GMI  -14.7  127.7   N/A   N/A     N/A     N/A      N/A  100.0 -14.6  127.7 Analysis Plot     
     20251124 191049  SSMISF18  -15.0  127.6   N/A   N/A     N/A     N/A      N/A   85.0 -14.6  127.7 Analysis Plot     
     20251125 050425       GMI  -15.1  127.7     5   46%    3.07    3.07      N/A   55.0 -14.7  127.4 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.