Tropical Storm 07S

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                 
     20251212 071951     AMSR2   -8.4   97.0   N/A   N/A     N/A     N/A      N/A   40.0  -8.7   96.0 Analysis Plot     
     20251213 015226       GMI   -8.6   94.6   N/A   N/A     N/A     N/A      N/A   45.0  -8.9   94.2 Analysis Plot     
     20251214 142936       GMI  -10.9   90.8   N/A   N/A     N/A     N/A      N/A   80.0 -10.7   90.9 Analysis Plot     
     20251214 193432     AMSR2  -11.3   91.3   212   24%    3.81    3.81      N/A   55.0 -11.0   91.4 Analysis Plot     
     20251215 075022     AMSR2  -11.2   91.7   N/A   N/A     N/A     N/A      N/A   50.0 -10.9   91.9 Analysis Plot     
     20251215 134646       GMI  -11.0   92.0   N/A   N/A     N/A     N/A      N/A   45.0 -10.9   92.1 Analysis Plot     
     20251215 234339  SSMISF17  -11.6   93.0    12   54%   10.45  -10.45      N/A   45.0 -10.9   93.2 Analysis Plot     
     20251216 012129       GMI  -11.3   92.8   N/A   N/A     N/A     N/A      N/A   45.0 -10.9   93.2 Analysis Plot     
     20251216 065607     AMSR2  -11.5   93.1   N/A   N/A     N/A     N/A      N/A   45.0 -11.6   93.1 Analysis Plot     
     20251216 093627  SSMISF18  -11.6   92.9   N/A   N/A     N/A     N/A      N/A   45.0 -11.6   93.1 Analysis Plot     
     20251216 122127  SSMISF17  -11.6   93.1    12   83%    2.31   -2.31      N/A   45.0 -11.6   93.1 Analysis Plot     
     20251216 192213     AMSR2  -11.9   93.2    34  100%   33.26  -48.26      N/A   45.0 -11.5   93.1 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.