Tropical Storm 29W

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                 
     20251009 041042     AMSR2   23.6  135.1   N/A   N/A     N/A     N/A      N/A   40.0  23.6  135.0 Analysis Plot     
     20251009 054121       GMI   23.9  134.9   N/A   N/A     N/A     N/A      N/A   40.0  23.6  135.0 Analysis Plot     
     20251009 190748       GMI   26.0  132.7   N/A   N/A     N/A     N/A      N/A   35.0  25.4  133.4 Analysis Plot     
     20251009 194113  SSMISF18   26.1  133.6   268   11%    4.32   -4.32      N/A   35.0  26.1  133.6 Analysis Plot     
     20251009 205638  SSMISF17   26.4  133.4   235    8%    3.07   -3.07      N/A   35.0  26.3  133.4 Analysis Plot     
     20251009 214924  SSMISF16   26.3  133.6   179   N/A    2.86   -2.86      N/A   35.0  26.3  133.4 Analysis Plot     
     20251010 045714       GMI   26.6  131.4   N/A   N/A     N/A     N/A      N/A   35.0  27.2  132.0 Analysis Plot     
     20251010 170130     AMSR2   27.3  130.8   235   29%    1.83   -1.83      N/A   35.0  27.0  130.6 Analysis Plot     
     20251010 192703  SSMISF18   27.1  130.3   N/A   N/A     N/A     N/A      N/A   40.0  27.0  130.7 Analysis Plot     
     20251011 040059     AMSR2   27.6  131.1    46   N/A    0.92   -0.92      N/A   35.0  27.9  130.8 Analysis Plot     
     20251011 191229  SSMISF18   29.4  132.4    34   36%   15.52   15.52      N/A   55.0  29.6  132.3 Analysis Plot     
     20251011 220830  SSMISF17   31.2  131.1   N/A   N/A     N/A     N/A      N/A   55.0  30.0  132.9 Analysis Plot     
     20251012 044408     AMSR2   30.7  134.9   N/A   N/A     N/A     N/A      N/A   60.0  30.7  134.8 Analysis Plot     
     20251012 183905       GMI   32.4  139.1   N/A   N/A     N/A     N/A      N/A   65.0  32.4  138.6 Analysis Plot     
     20251012 185707  SSMISF18   32.1  138.7   135   35%   14.36   14.36      N/A   70.0  32.5  139.1 Analysis Plot     
     20251013 034829     AMSR2   33.3  142.1   157   31%   12.67   12.67      N/A   75.0  33.5  142.1 Analysis Plot     
     20251013 155129     AMSR2   34.4  147.2    57   46%   10.24   10.24      N/A   65.0  34.7  147.7 Analysis Plot     
     20251014 020926       GMI   34.7  152.6   101   68%   21.69   21.69  >65 kts   60.0  34.5  151.5 Analysis Plot     
     20251014 025321     AMSR2   34.9  152.9    57  100%   28.07   43.07  >65 kts   65.0  35.0  152.8 Analysis Plot     
     20251014 145535     AMSR2   35.9  161.5    57    3%    4.77    4.77      N/A   70.0  35.6  161.7 Analysis Plot     
     20251015 012929       GMI   35.0  164.8   N/A   N/A     N/A     N/A      N/A   65.0  35.8  165.4 Analysis Plot     
     20251015 015758     AMSR2   34.9  166.3   N/A   N/A     N/A     N/A      N/A   65.0  35.9  166.2 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.