Tropical Depression 06W

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                 
     20240807 064409  SSMISF18   26.0  141.9    12   N/A    2.46   -2.46      N/A   25.0  25.4  141.7 Analysis Plot     
     20240807 085105       GMI   25.1  142.2   N/A   N/A     N/A     N/A      N/A   25.0  25.9  141.8 Analysis Plot     
     20240807 155505     AMSR2   25.5  142.7    12   40%    7.46   -7.46      N/A   30.0  26.1  142.7 Analysis Plot     
     20240807 191325  SSMISF18   27.6  142.0     5   N/A    0.09   -0.09      N/A   40.0  26.0  143.2 Analysis Plot     
     20240807 202821  SSMISF17   25.8  143.4    46   22%    5.82   -5.82      N/A   40.0  26.3  143.4 Analysis Plot     
     20240807 221822       GMI   26.4  143.7    46    7%    9.39   -9.39      N/A   40.0  26.4  143.5 Analysis Plot     
     20240808 063109  SSMISF18   28.0  144.9    23   N/A    7.80   -7.80      N/A   40.0  27.8  144.5 Analysis Plot     
     20240808 080831       GMI   28.1  145.2    23   97%   14.82  -29.82      N/A   50.0  27.9  144.6 Analysis Plot     
     20240808 163654     AMSR2   29.6  145.7    12   57%    3.99    3.99      N/A   65.0  30.2  145.6 Analysis Plot     
     20240808 185749  SSMISF18   30.0  145.1   N/A   N/A     N/A     N/A      N/A   65.0  30.3  145.7 Analysis Plot     
     20240808 213646       GMI   30.4  145.9   N/A   N/A     N/A     N/A      N/A   65.0  30.6  145.8 Analysis Plot     
     20240809 033618     AMSR2   31.7  146.3   N/A   N/A     N/A     N/A      N/A   65.0  31.8  146.1 Analysis Plot     
     20240809 061813  SSMISF18   31.4  145.1   N/A   N/A     N/A     N/A      N/A   65.0  31.9  145.9 Analysis Plot     
     20240809 072502       GMI   32.3  146.2    23   28%    5.82    5.82      N/A   60.0  32.0  145.9 Analysis Plot     
     20240809 073339  SSMISF17   31.7  146.1   N/A   N/A     N/A     N/A      N/A   65.0  32.6  145.9 Analysis Plot     
     20240809 082822  SSMISF16   32.5  146.3   N/A   N/A     N/A     N/A      N/A   65.0  32.9  146.2 Analysis Plot     
     20240809 154101     AMSR2   33.5  146.4    23   14%    1.25    1.25      N/A   55.0  33.7  145.9 Analysis Plot     
     20240809 184243  SSMISF18   34.0  145.8    23   N/A    3.26   -3.26      N/A   45.0  34.3  145.9 Analysis Plot     
     20240809 205226  SSMISF16   34.3  145.8    46   N/A    5.69   -5.69      N/A   45.0  34.7  145.7 Analysis Plot     
     20240810 064043       GMI   34.7  143.9   N/A   N/A     N/A     N/A      N/A   50.0  35.7  145.6 Analysis Plot     
     20240810 081511  SSMISF16   35.9  145.5    23   N/A    0.34   -0.34      N/A   45.0  36.5  144.7 Analysis Plot     
     20240810 162213     AMSR2   36.6  145.2    12   10%    8.95   -8.95      N/A   50.0  36.6  144.9 Analysis Plot     
     20240810 182841  SSMISF18   37.0  144.3   N/A   N/A     N/A     N/A      N/A   45.0  36.7  144.8 Analysis Plot     
     20240810 214913       GMI   37.0  144.7   N/A   N/A     N/A     N/A      N/A   45.0  37.1  144.8 Analysis Plot     
     20240811 055205  SSMISF18   37.6  143.7    34   N/A    3.28   -3.28      N/A   45.0  37.9  144.1 Analysis Plot     
     20240811 080201  SSMISF16   37.7  143.6    12   N/A    2.13   -2.13      N/A   45.0  37.9  143.4 Analysis Plot     
     20240811 084812  SSMISF17   37.7  143.8    12   18%    9.78    9.78      N/A   55.0  37.9  143.2 Analysis Plot     
     20240811 170551     AMSR2   39.6  140.7   N/A   N/A     N/A     N/A      N/A   55.0  38.5  142.4 Analysis Plot     
     20240811 181548  SSMISF18   38.3  141.1   N/A   N/A     N/A     N/A      N/A   50.0  38.5  142.3 Analysis Plot     
     20240811 202554  SSMISF16   38.4  141.9   N/A   N/A     N/A     N/A      N/A   50.0  38.7  142.3 Analysis Plot     
     20240811 210935  SSMISF17   38.3  141.9   N/A   N/A     N/A     N/A      N/A   50.0  38.8  142.1 Analysis Plot     
     20240812 053935  SSMISF18   39.6  140.6   N/A   N/A     N/A     N/A      N/A   45.0  39.8  140.7 Analysis Plot     
     20240812 065044       GMI   39.8  141.0    12   31%    1.96    1.96      N/A   55.0  39.9  140.6 Analysis Plot     
     20240812 074943  SSMISF16   40.0  141.0   157   N/A    0.65   -0.65      N/A   45.0  40.2  140.6 Analysis Plot     
     20240812 083409  SSMISF17   40.1  141.1   168    3%    2.05   -2.05      N/A   45.0  40.3  140.6 Analysis Plot     
     20240812 160958     AMSR2   40.6  139.5    12   N/A    2.47   -2.47      N/A   25.0  40.7  139.4 Analysis Plot     
     20240812 194158  SSMISF18   41.0  138.6   212   N/A    1.00   -1.00      N/A   25.0  41.0  138.7 Analysis Plot     
     20240812 215949       GMI   41.8  139.0   N/A   N/A     N/A     N/A      N/A   25.0  41.1  138.7 Analysis Plot     
     20240813 031536     AMSR2   41.9  138.9   N/A   N/A     N/A     N/A      N/A   20.0  41.3  138.5 Analysis Plot     
     20240813 052718  SSMISF18   41.0  136.3   N/A   N/A     N/A     N/A      N/A   20.0  41.4  138.4 Analysis Plot     
     20240813 060706       GMI   41.8  139.1   N/A   N/A     N/A     N/A      N/A   20.0  41.4  138.4 Analysis Plot     
     20240813 073750  SSMISF16   41.8  139.1   N/A   N/A     N/A     N/A      N/A   20.0  41.5  138.3 Analysis Plot     
     20240813 082042  SSMISF17   41.4  139.0   N/A   N/A     N/A     N/A      N/A   20.0  41.5  138.3 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.