Tropical Storm 02P

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                 
     20231113 040359  SSMISF18  -10.4  171.1   N/A   N/A     N/A     N/A      N/A   35.0 -11.1  171.7 Analysis Plot     
     20231113 055549  SSMISF16  -11.1  171.3   123   65%   12.19  -12.19      N/A   35.0 -11.5  172.1 Analysis Plot     
     20231113 070029  SSMISF17  -11.2  171.8   N/A   N/A     N/A     N/A      N/A   45.0 -11.5  172.1 Analysis Plot     
     20231113 131855       GMI  -12.9  172.8    68   50%   12.12   12.12      N/A   55.0 -12.9  173.4 Analysis Plot     
     20231113 140221     AMSR2  -13.1  172.3   N/A   N/A     N/A     N/A      N/A   55.0 -13.6  173.9 Analysis Plot     
     20231113 181052  SSMISF17  -13.5  173.3   N/A   N/A     N/A     N/A      N/A   55.0 -14.1  174.4 Analysis Plot     
     20231114 021606     AMSR2  -15.2  174.4   N/A   N/A     N/A     N/A      N/A   65.0 -15.4  175.2 Analysis Plot     
     20231114 054127  SSMISF16  -16.1  175.1    79   50%   13.12   13.12      N/A   65.0 -15.9  175.5 Analysis Plot     
     20231114 064521  SSMISF17  -16.3  175.4    90   57%   16.30   16.30      N/A   65.0 -16.3  175.7 Analysis Plot     
     20231114 123824       GMI  -17.5  175.8   N/A   N/A     N/A     N/A      N/A   65.0 -17.5  175.8 Analysis Plot     
     20231114 130927     AMSR2  -17.6  176.1   N/A   N/A     N/A     N/A      N/A   65.0 -17.8  175.9 Analysis Plot     
     20231114 175822  SSMISF17  -19.4  176.3   N/A   N/A     N/A     N/A      N/A   65.0 -18.6  176.3 Analysis Plot     
     20231115 012042     AMSR2  -20.8  178.3   N/A   N/A     N/A     N/A      N/A   75.0 -20.8  178.3 Analysis Plot     
     20231115 052656  SSMISF16  -22.0  179.1   N/A   N/A     N/A     N/A      N/A   75.0 -21.5  178.6 Analysis Plot     
     20231115 063008  SSMISF17  -22.0  179.4   N/A   N/A     N/A     N/A      N/A   70.0 -21.8  178.8 Analysis Plot     
     20231115 135351     AMSR2  -22.5  178.3   N/A   N/A     N/A     N/A      N/A   65.0 -23.3  179.1 Analysis Plot     
     20231115 174550  SSMISF17  -23.4  179.2   N/A   N/A     N/A     N/A      N/A   65.0 -24.0  179.4 Analysis Plot     
     20231116 020056     AMSR2  -25.1 -179.1   N/A   N/A     N/A     N/A      N/A   50.0 -25.5 -179.3 Analysis Plot     
     20231116 061508  SSMISF17  -27.8 -178.5   N/A   N/A     N/A     N/A      N/A   45.0 -26.4 -178.5 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.