Tropical Storm 27S

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                 
     20250324 181705       GMI  -16.7  110.9   N/A   N/A     N/A     N/A      N/A   35.0 -16.8  110.1 Analysis Plot     
     20250324 205145  SSMISF18  -17.0  110.0    68   38%    0.64   -0.64      N/A   35.0 -16.6  110.0 Analysis Plot     
     20250324 224427  SSMISF17  -17.3  108.5   N/A   N/A     N/A     N/A      N/A   35.0 -16.6  109.8 Analysis Plot     
     20250325 061626     AMSR2  -16.9  108.6   N/A   N/A     N/A     N/A      N/A   40.0 -16.7  109.1 Analysis Plot     
     20250325 092646  SSMISF18  -17.2  108.0   201   26%    3.17   -3.17      N/A   40.0 -16.9  108.4 Analysis Plot     
     20250325 111842  SSMISF17  -17.1  107.9   212   17%    1.38   -1.38      N/A   40.0 -17.0  108.1 Analysis Plot     
     20250325 173357       GMI  -17.2  106.6   N/A   N/A     N/A     N/A      N/A   40.0 -17.2  107.3 Analysis Plot     
     20250325 184826     AMSR2  -17.8  106.3   N/A   N/A     N/A     N/A      N/A   45.0 -17.4  106.4 Analysis Plot     
     20250325 233032  SSMISF16  -17.9  105.6    57   18%   13.56  -13.56      N/A   45.0 -17.5  105.6 Analysis Plot     
     20250326 050349       GMI  -17.9  104.1    23   50%    0.40    0.40      N/A   55.0 -17.8  104.3 Analysis Plot     
     20250326 065908     AMSR2  -17.8  103.6    23   90%   16.82   31.82  >65 kts   60.0 -17.8  103.7 Analysis Plot     
     20250326 091137  SSMISF18  -17.7  103.2    23   78%    1.77    1.77      N/A   60.0 -17.9  103.4 Analysis Plot     
     20250326 110452  SSMISF17  -17.7  102.5   N/A   N/A     N/A     N/A      N/A   60.0 -17.8  103.1 Analysis Plot     
     20250326 120436  SSMISF16  -17.6  102.5   N/A   N/A     N/A     N/A      N/A   60.0 -17.8  103.0 Analysis Plot     
     20250326 231650  SSMISF16  -17.0  101.0    46  100%   25.07   40.07  >65 kts   70.0 -17.2  101.1 Analysis Plot     
     20250327 085926  SSMISF18  -16.8   99.3    23  100%   24.85   39.85  >65 kts   80.0 -16.8   99.4 Analysis Plot     
     20250327 115107  SSMISF16  -16.5   99.0    23   60%   11.53   11.53      N/A   80.0 -16.8   98.9 Analysis Plot     
     20250327 174516       GMI  -16.7   98.0    68   40%   12.78   12.78      N/A   90.0 -16.7   98.0 Analysis Plot     
     20250327 183511     AMSR2  -16.7   97.9    68   60%   17.47   17.47      N/A   85.0 -16.9   97.7 Analysis Plot     
     20250327 234343  SSMISF17  -16.9   97.0    57   38%   15.51   15.51      N/A   85.0 -17.0   97.0 Analysis Plot     
     20250328 064847     AMSR2  -16.7   95.5   N/A   N/A     N/A     N/A      N/A   80.0 -17.0   95.7 Analysis Plot     
     20250328 121749  SSMISF17  -17.1   94.6    34  100%   37.38   52.38  >65 kts   80.0 -17.0   94.1 Analysis Plot     
     20250328 191803     AMSR2  -17.4   92.9    34  100%   50.06   65.06  >85 kts  115.0 -17.6   92.4 Analysis Plot     
     20250328 213725  SSMISF18  -17.6   92.4    23  100%   52.16   67.16  >85 kts  115.0 -17.7   92.2 Analysis Plot     
     20250328 233012  SSMISF17  -17.7   92.0    23  100%   47.61   62.61  >85 kts  115.0 -17.8   91.9 Analysis Plot     
     20250329 003122  SSMISF16  -17.8   92.1    23  100%   54.59   69.59  >85 kts  115.0 -17.9   91.7 Analysis Plot     
     20250329 043145       GMI  -17.9   91.2    23  100%   52.50   67.50  >85 kts  115.0 -18.1   91.2 Analysis Plot     
     20250329 073007     AMSR2  -18.2   90.8    23  100%   50.27   65.27  >85 kts  120.0 -18.3   90.7 Analysis Plot     
     20250329 101109  SSMISF18  -18.4   90.3    12  100%   46.53   61.53  >85 kts  120.0 -18.5   90.3 Analysis Plot     
     20250329 120326  SSMISF17  -18.6   90.0     5  100%   21.06   36.06  >65 kts  120.0 -18.7   90.0 Analysis Plot     
     20250329 130505  SSMISF16  -18.7   90.1    12  100%   39.81   54.81  >65 kts  130.0 -18.7   90.0 Analysis Plot     
     20250329 175521       GMI  -19.4   89.4    12  100%   36.96   51.96  >65 kts  130.0 -19.1   89.3 Analysis Plot     
     20250329 212458  SSMISF18  -20.2   88.9   212    3%    1.66    1.66      N/A  125.0 -20.1   89.0 Analysis Plot     
     20250330 001754  SSMISF16  -20.7   88.7   N/A   N/A     N/A     N/A      N/A  115.0 -20.5   88.8 Analysis Plot     
     20250330 081223     AMSR2  -21.6   88.0    12   57%    4.15    4.15      N/A  100.0 -21.5   88.2 Analysis Plot     
     20250330 124953  SSMISF16  -22.3   88.2   157   31%    0.34    0.34      N/A   85.0 -22.1   88.1 Analysis Plot     
     20250330 190746     AMSR2  -23.4   88.3   N/A   N/A     N/A     N/A      N/A   70.0 -23.0   88.0 Analysis Plot     
     20250331 000517  SSMISF16  -24.6   88.3   N/A   N/A     N/A     N/A      N/A   70.0 -23.4   88.1 Analysis Plot     
     20250331 235228  SSMISF16  -24.8   88.5   201   N/A    2.68    2.68      N/A   55.0 -25.2   88.6 Analysis Plot     
     20250401 035732       GMI  -24.5   88.4   N/A   N/A     N/A     N/A      N/A   50.0 -25.4   88.6 Analysis Plot     
     20250401 122233  SSMISF16  -25.3   88.7   N/A   N/A     N/A     N/A      N/A   45.0 -25.2   88.2 Analysis Plot     
     20250401 130039  SSMISF17  -25.3   88.7   N/A   N/A     N/A     N/A      N/A   40.0 -25.2   88.1 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.