Tropical Storm 06L


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                 
     20230819 214613  SSMISF17   16.4  -50.8   212    7%    2.93   -2.93      N/A   30.0  16.7  -50.3 Analysis Plot     
     20230820 041227       GMI   16.8  -51.9   N/A   N/A     N/A     N/A      N/A   30.0  17.2  -51.7 Analysis Plot     
     20230820 051933     AMSR2   17.0  -52.3   N/A   N/A     N/A     N/A      N/A   30.0  17.3  -52.3 Analysis Plot     
     20230820 102107  SSMISF17   16.7  -53.1   257    4%    3.02   -3.02      N/A   30.0  16.8  -53.5 Analysis Plot     
     20230820 172914       GMI   16.5  -54.3   168   N/A    0.32   -0.32      N/A   30.0  16.9  -54.1 Analysis Plot     
     20230820 193903  SSMISF18   16.6  -54.5   N/A   N/A     N/A     N/A      N/A   30.0  16.9  -54.5 Analysis Plot     
     20230820 213305  SSMISF17   16.6  -54.8   257   12%    3.07   -3.07      N/A   30.0  16.6  -54.8 Analysis Plot     
     20230821 081355  SSMISF18   16.6  -55.9   223    6%    1.28   -1.28      N/A   35.0  16.7  -56.5 Analysis Plot     
     20230821 165539     AMSR2   17.0  -57.4   268    1%    3.17   -3.17      N/A   35.0  17.0  -57.4 Analysis Plot     
     20230821 192557  SSMISF18   16.9  -57.6   257   10%    2.28   -2.28      N/A   25.0  17.0  -57.5 Analysis Plot     
     20230821 192559  SSMISF18   16.9  -57.6   257    8%    2.34   -2.34      N/A   25.0  17.1  -57.5 Analysis Plot     
     20230821 211839  SSMISF16   17.3  -57.5   179   11%    1.53   -1.53      N/A   25.0  17.1  -57.6 Analysis Plot     
     20230822 040125       GMI   17.1  -58.7   190   22%    4.94   -4.94      N/A   25.0  17.1  -58.5 Analysis Plot     
     20230822 050900     AMSR2   17.2  -59.0   N/A   N/A     N/A     N/A      N/A   25.0  17.3  -58.9 Analysis Plot     
     20230822 080017  SSMISF18   17.2  -58.8   157    8%    2.30   -2.30      N/A   25.0  17.2  -58.8 Analysis Plot     
     20230822 095312  SSMISF16   17.4  -59.0   246    1%    2.54   -2.54      N/A   25.0  17.4  -59.0 Analysis Plot     
     20230901 072652  SSMISF18   28.5  -54.1   N/A   N/A     N/A     N/A      N/A   30.0  28.7  -54.9 Analysis Plot     
     20230901 091900  SSMISF16   28.6  -55.5   101   N/A    1.18   -1.18      N/A   30.0  28.7  -54.7 Analysis Plot     
     20230901 164018     AMSR2   28.1  -54.8    90   29%    3.95   -3.95      N/A   30.0  28.7  -54.4 Analysis Plot     
     20230901 203738  SSMISF16   28.0  -54.6    57   32%    8.51   -8.51      N/A   35.0  27.8  -54.4 Analysis Plot     
     20230901 221609  SSMISF17   28.3  -54.5   N/A   N/A     N/A     N/A      N/A   35.0  27.7  -54.3 Analysis Plot     
     20230902 090623  SSMISF16   27.7  -54.3   146   N/A    2.46   -2.46      N/A   40.0  27.8  -54.2 Analysis Plot     
     20230902 104319  SSMISF17   27.8  -54.3   179   18%    1.29   -1.29      N/A   40.0  27.8  -54.2 Analysis Plot     
     20230902 140009       GMI   27.8  -54.2    57   18%    1.24   -1.24      N/A   45.0  27.9  -54.0 Analysis Plot     
     20230902 202457  SSMISF16   28.5  -54.1    57   N/A    3.39   -3.39      N/A   45.0  28.4  -53.8 Analysis Plot     
     20230902 220132  SSMISF17   28.5  -54.1   N/A   N/A     N/A     N/A      N/A   45.0  28.5  -53.7 Analysis Plot     
     20230902 234458       GMI   28.6  -53.7   N/A   N/A     N/A     N/A      N/A   45.0  28.6  -53.7 Analysis Plot     
     20230903 052843     AMSR2   29.6  -53.1    68    8%    1.72   -1.72      N/A   50.0  29.9  -53.0 Analysis Plot     
     20230903 085302  SSMISF16   30.2  -52.8   135    4%    4.22   -4.22      N/A   50.0  30.2  -52.8 Analysis Plot     
     20230903 102829  SSMISF17   30.3  -52.5   112    8%    2.74   -2.74      N/A   50.0  30.6  -52.6 Analysis Plot     
     20230903 162845     AMSR2   31.6  -51.8   N/A   N/A     N/A     N/A      N/A   50.0  31.7  -51.6 Analysis Plot     
     20230903 201250  SSMISF16   32.7  -51.3    79   N/A    2.91   -2.91      N/A   45.0  32.8  -51.4 Analysis Plot     
     20230903 214919  SSMISF17   33.3  -51.0   101   N/A    4.34   -4.34      N/A   45.0  33.2  -51.2 Analysis Plot     
     20230903 224958       GMI   33.3  -51.0   N/A   N/A     N/A     N/A      N/A   45.0  33.4  -51.2 Analysis Plot     
     20230904 082600  SSMISF18   37.9  -50.9   N/A   N/A     N/A     N/A      N/A   45.0  38.0  -51.1 Analysis Plot     
     20230904 101224  SSMISF17   38.7  -51.0   179   N/A    2.54   -2.54      N/A   45.0  38.8  -51.6 Analysis Plot     
     20230904 135113       GMI   38.3  -50.0   N/A   N/A     N/A     N/A      N/A   45.0  39.3  -52.1 Analysis Plot     
     20230904 135118       GMI   41.1  -50.7   N/A   N/A     N/A     N/A      N/A   45.0  39.5  -52.3 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.