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                 
     20230629 114123  SSMISF16   13.6  -98.3   N/A   N/A     N/A     N/A      N/A   30.0  14.4  -98.5 Analysis Plot     
     20230629 195412     AMSR2   14.9  -99.2    46   57%   21.52  -21.52      N/A   35.0  15.0  -99.4 Analysis Plot     
     20230629 223854  SSMISF18   15.4  -99.6    79   N/A    2.62   -2.62      N/A   35.0  15.1  -99.7 Analysis Plot     
     20230630 005651  SSMISF17   15.6 -100.0    57   N/A    5.97   -5.97      N/A   35.0  15.3 -100.0 Analysis Plot     
     20230630 080741     AMSR2   16.3 -101.2   N/A   N/A     N/A     N/A      N/A   50.0  16.4 -101.4 Analysis Plot     
     20230630 111407  SSMISF18   16.6 -101.8    46   21%    8.18   -8.18      N/A   50.0  16.7 -101.8 Analysis Plot     
     20230630 133142  SSMISF17   16.9 -101.9    34  100%   22.59   37.59  >65 kts   55.0  17.3 -102.3 Analysis Plot     
     20230630 203834     AMSR2   17.8 -103.1    23  100%   33.88   48.88  >65 kts   75.0  17.9 -103.2 Analysis Plot     
     20230630 222642  SSMISF18   18.1 -103.7    23   81%   13.92   13.92      N/A   75.0  18.0 -103.3 Analysis Plot     
     20230630 222647  SSMISF18   18.1 -103.6    23   85%   12.09   12.09      N/A   75.0  18.1 -103.5 Analysis Plot     
     20230701 002040  SSMISF16   16.6 -103.2   N/A   N/A     N/A     N/A      N/A   75.0  18.2 -103.6 Analysis Plot     
     20230701 004451  SSMISF17   18.2 -104.2   N/A   N/A     N/A     N/A      N/A   75.0  18.3 -103.7 Analysis Plot     
     20230701 084918     AMSR2   18.3 -104.8   N/A   N/A     N/A     N/A      N/A   65.0  19.6 -105.3 Analysis Plot     
     20230701 114211       GMI   20.3 -106.0    46   53%   13.01   13.01      N/A   65.0  19.7 -105.4 Analysis Plot     
     20230701 125356  SSMISF16   20.1 -106.1    23   44%    9.20   -9.20      N/A   50.0  20.1 -105.9 Analysis Plot     
     20230701 131745  SSMISF17   20.5 -106.0   N/A   N/A     N/A     N/A      N/A   50.0  20.4 -105.9 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.