Tropical Storm 02E

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                 
     20250608 082631     AMSR2   15.1 -102.3    46   62%    7.95   -7.95      N/A   40.0  15.3 -102.6 Analysis Plot     
     20250608 112246  SSMISF18   15.2 -102.9    23   42%    5.35   -5.35      N/A   40.0  15.4 -102.9 Analysis Plot     
     20250608 220510       GMI   16.1 -103.9    46   N/A   10.90  -10.90      N/A   50.0  16.1 -104.2 Analysis Plot     
     20250608 223355  SSMISF18   16.3 -104.4    68    1%   11.77  -11.77      N/A   50.0  16.3 -104.6 Analysis Plot     
     20250609 014620  SSMISF16   16.6 -105.1   123   24%    0.19    0.19      N/A   55.0  16.7 -105.2 Analysis Plot     
     20250609 090930     AMSR2   17.5 -105.9   N/A   N/A     N/A     N/A      N/A   60.0  17.1 -106.3 Analysis Plot     
     20250609 110803  SSMISF18   17.9 -106.3   179   18%    1.83    1.83      N/A   60.0  17.2 -106.5 Analysis Plot     
     20250609 200257     AMSR2   18.1 -106.6    23   38%   10.70   10.70      N/A   65.0  18.2 -106.8 Analysis Plot     
     20250610 085211       GMI   19.3 -108.4    79   25%    7.34   -7.34      N/A   50.0  19.1 -108.1 Analysis Plot     
     20250610 204547     AMSR2   20.7 -108.3    46   N/A    0.02   -0.02      N/A   35.0  21.0 -108.1 Analysis Plot     
     20250610 221631       GMI   20.9 -108.1   279   N/A   11.97  -11.97      N/A   35.0  21.0 -108.1 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.