Tropical Storm 15E

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                 
     20250930 204242     AMSR2   10.9 -114.7   N/A   N/A     N/A     N/A      N/A   40.0  10.3 -114.0 Analysis Plot     
     20251001 014752  SSMISF17   10.8 -114.6    68    7%    1.83   -1.83      N/A   40.0  10.6 -114.1 Analysis Plot     
     20251001 023723  SSMISF16   11.3 -114.9   168   40%    1.15   -1.15      N/A   40.0  10.8 -114.4 Analysis Plot     
     20251001 085821     AMSR2   11.0 -115.1    34  100%   22.30  -37.30      N/A   50.0  11.2 -114.9 Analysis Plot     
     20251001 134101       GMI   11.5 -115.7    23   60%    2.77    2.77      N/A   55.0  11.4 -115.1 Analysis Plot     
     20251001 212552     AMSR2   11.6 -116.7    23   83%    3.63    3.63      N/A   55.0  12.1 -116.4 Analysis Plot     
     20251003 003145       GMI   12.9 -119.3   N/A   N/A     N/A     N/A      N/A   50.0  12.8 -119.3 Analysis Plot     
     20251003 135207       GMI   14.5 -121.9   N/A   N/A     N/A     N/A      N/A   45.0  13.3 -121.0 Analysis Plot     
     20251003 211426     AMSR2   13.7 -122.6    12   N/A    3.85   -3.85      N/A   50.0  13.8 -121.9 Analysis Plot     
     20251004 092850     AMSR2   14.4 -123.1    90   54%   14.86  -14.86      N/A   45.0  14.4 -123.4 Analysis Plot     
     20251004 131051       GMI   14.5 -123.9    57   61%   10.06  -10.06      N/A   50.0  14.4 -123.5 Analysis Plot     
     20251004 215740     AMSR2   15.1 -124.0    23   50%   15.79   15.79      N/A   55.0  15.0 -124.0 Analysis Plot     
     20251005 004215       GMI   15.1 -124.1   N/A   N/A     N/A     N/A      N/A   55.0  15.1 -124.0 Analysis Plot     
     20251005 101034     AMSR2   15.6 -124.0    46   40%   21.70   21.70  >65 kts   60.0  15.7 -124.0 Analysis Plot     
     20251005 210359     AMSR2   15.8 -123.3   N/A   N/A     N/A     N/A      N/A   70.0  16.1 -123.2 Analysis Plot     
     20251006 000101       GMI   16.2 -123.0    12  100%   30.81   45.81  >65 kts   70.0  16.1 -123.1 Analysis Plot     
     20251006 214536     AMSR2   16.1 -120.8   N/A   N/A     N/A     N/A      N/A   45.0  16.0 -120.8 Analysis Plot     
     20251006 231858       GMI   16.1 -120.6   N/A   N/A     N/A     N/A      N/A   45.0  16.0 -120.8 Analysis Plot     
     20251007 124109       GMI   15.9 -120.0   N/A   N/A     N/A     N/A      N/A   45.0  15.6 -119.1 Analysis Plot     
     20251007 205055     AMSR2   15.2 -118.6   N/A   N/A     N/A     N/A      N/A   40.0  15.2 -118.7 Analysis Plot     
     20251008 090347     AMSR2   15.3 -117.1   N/A   N/A     N/A     N/A      N/A   35.0  15.3 -117.0 Analysis Plot     
     20251008 120012       GMI   15.5 -117.2   201   17%    0.96   -0.96      N/A   35.0  15.3 -116.8 Analysis Plot     
     20251009 111921       GMI   17.5 -111.0   N/A   N/A     N/A     N/A      N/A   35.0  17.1 -111.1 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.