Typhoon 12W

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                 
     20260727 012137     AMSR2   13.1  178.0    46   19%    9.71   -9.71      N/A   30.0  12.8  177.7 Analysis Plot     
     20260727 033806       GMI   13.3  177.3    46   24%    5.60   -5.60      N/A   30.0  12.8  177.5 Analysis Plot     
     20260727 061800  SSMISF17   13.6  176.6     5   N/A    0.87   -0.87      N/A   30.0  12.8  176.7 Analysis Plot     
     20260727 150954       GMI   13.1  174.1    12   50%    7.94   -7.94      N/A   45.0  13.6  174.6 Analysis Plot     
     20260727 163649  SSMISF18   13.5  174.2   123   17%    3.52   -3.52      N/A   40.0  13.6  174.0 Analysis Plot     
     20260727 185634  SSMISF17   12.9  173.6    34   97%   19.88  -34.88      N/A   45.0  13.2  173.1 Analysis Plot     
     20260728 020438     AMSR2   13.1  172.3    12   96%   19.09   34.09  >65 kts   60.0  13.0  172.2 Analysis Plot     
     20260728 060555  SSMISF17   13.4  171.5     5   65%    1.47    1.47      N/A   60.0  13.0  171.7 Analysis Plot     
     20260728 074404  SSMISF16   13.4  171.3     5   94%    5.32   20.32  >65 kts   75.0  13.4  171.3 Analysis Plot     
     20260728 141851     AMSR2   13.4  170.3     5  100%   16.32   31.32  >65 kts  100.0  13.7  170.0 Analysis Plot     
     20260729 034741       GMI   14.5  168.5    46  100%   34.22   49.22  >65 kts  120.0  14.4  168.6 Analysis Plot     
     20260729 051412  SSMISF18   14.7  168.4    23  100%   26.99   41.99  >65 kts  120.0  14.5  168.4 Analysis Plot     
     20260729 073100  SSMISF16   14.8  167.9    23  100%   46.38   61.38  >85 kts  120.0  14.7  168.0 Analysis Plot     
     20260729 151954       GMI   14.8  165.8   N/A   N/A     N/A     N/A      N/A  120.0  15.4  167.1 Analysis Plot     
     20260729 182807  SSMISF17   15.7  166.4    23  100%   54.95   69.95  >85 kts  140.0  15.9  166.6 Analysis Plot     
     20260730 015442     AMSR2   16.5  165.4    23  100%   46.38   61.38  >85 kts  140.0  16.6  165.2 Analysis Plot     
     20260730 143530       GMI   17.5  163.4    46  100%   51.99   66.99  >85 kts  130.0  17.8  163.5 Analysis Plot     
     20260731 035811       GMI   18.5  161.2    34  100%   33.93   48.93  >65 kts  135.0  18.7  161.4 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.