Tropical Storm 12E

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                 
     20250902 202028     AMSR2   19.2 -108.8    46   36%   15.27  -15.27      N/A   45.0  19.4 -109.0 Analysis Plot     
     20250902 212524       GMI   19.4 -108.9   N/A   N/A     N/A     N/A      N/A   45.0  19.5 -109.1 Analysis Plot     
     20250902 224256  SSMISF18   19.6 -109.4    23   97%   17.97  -32.97      N/A   45.0  19.6 -109.3 Analysis Plot     
     20250902 224309  SSMISF18   19.7 -109.4    34  100%   20.54  -35.54      N/A   45.0  19.9 -109.7 Analysis Plot     
     20250903 111455  SSMISF18   21.6 -111.3   N/A   N/A     N/A     N/A      N/A   60.0  21.7 -110.9 Analysis Plot     
     20250903 141642  SSMISF17   21.9 -110.7   N/A   N/A     N/A     N/A      N/A   65.0  22.4 -111.8 Analysis Plot     
     20250903 210419     AMSR2   22.9 -112.4     5  100%   13.39   28.39  >65 kts   70.0  23.0 -112.6 Analysis Plot     
     20250904 013055  SSMISF17   22.7 -111.6   N/A   N/A     N/A     N/A      N/A   75.0  23.2 -112.9 Analysis Plot     
     20250904 081033       GMI   23.8 -114.1   190   11%    1.80    1.80      N/A   70.0  23.8 -113.6 Analysis Plot     
     20250904 091257     AMSR2   23.9 -114.2   190   12%    2.92    2.92      N/A   70.0  24.2 -113.8 Analysis Plot     
     20250904 140106  SSMISF17   23.6 -113.8   N/A   N/A     N/A     N/A      N/A   60.0  24.2 -114.2 Analysis Plot     
     20250904 213655       GMI   24.6 -114.9   N/A   N/A     N/A     N/A      N/A   45.0  24.6 -114.8 Analysis Plot     
     20250905 011715  SSMISF17   24.9 -115.0   324   N/A    3.47   -3.47      N/A   40.0  24.9 -115.0 Analysis Plot     
     20250905 015346  SSMISF16   24.7 -115.0    23   N/A    2.03   -2.03      N/A   40.0  24.9 -115.0 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.