Tropical Depression 09W

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                 
     20260701 122723       GMI   10.1  162.5    57   18%    2.97   -2.97      N/A   30.0   9.8  162.1 Analysis Plot     
     20260701 174551  SSMISF18    9.5  161.2   N/A   N/A     N/A     N/A      N/A   40.0  10.5  161.3 Analysis Plot     
     20260702 071541  SSMISF17   12.3  158.7   101   32%    3.82   -3.82      N/A   50.0  11.6  158.8 Analysis Plot     
     20260702 084054  SSMISF16   12.2  158.3   112   44%    4.92   -4.92      N/A   50.0  11.7  158.6 Analysis Plot     
     20260702 152043     AMSR2   12.5  157.0   101   33%    5.66    5.66      N/A   60.0  12.6  156.7 Analysis Plot     
     20260702 173152  SSMISF18   12.5  156.4   112   67%    4.75    4.75      N/A   55.0  12.6  156.6 Analysis Plot     
     20260702 195221  SSMISF17   12.6  156.2    46   47%    1.39    1.39      N/A   70.0  12.7  156.0 Analysis Plot     
     20260702 231727       GMI   12.8  155.4    90  100%   33.83   48.83  >65 kts   70.0  12.8  155.7 Analysis Plot     
     20260703 070306  SSMISF17   12.9  153.8    57  100%   54.83   69.83  >85 kts  105.0  12.7  154.1 Analysis Plot     
     20260703 123834       GMI   12.8  153.0   N/A   N/A     N/A     N/A      N/A  105.0  12.9  153.3 Analysis Plot     
     20260703 193820  SSMISF17   12.5  151.9    34  100%   55.50   70.50  >85 kts  140.0  12.7  151.9 Analysis Plot     
     20260703 210350  SSMISF16   12.4  151.7    34  100%   66.26   81.26  >85 kts  140.0  12.7  151.7 Analysis Plot     
     20260704 025505     AMSR2   12.6  151.2    34  100%   52.16   67.16  >85 kts  140.0  12.5  150.9 Analysis Plot     
     20260704 060704  SSMISF18   12.7  150.8    23  100%   66.08   81.08  >85 kts  140.0  12.5  150.9 Analysis Plot     
     20260704 115530       GMI   12.6  150.3    34  100%   53.31   68.31  >85 kts  145.0  12.7  150.2 Analysis Plot     
     20260704 184359  SSMISF18   12.5  149.5    34  100%   63.85   78.85  >85 kts  135.0  13.0  149.2 Analysis Plot     
     20260704 205108  SSMISF16   12.7  149.1    34  100%   65.18   80.18  >85 kts  135.0  13.0  149.1 Analysis Plot     
     20260704 232722       GMI   12.8  148.9    46  100%   55.67   70.67  >85 kts  135.0  13.1  148.9 Analysis Plot     
     20260705 033705     AMSR2   13.3  148.5    46  100%   55.52   70.52  >85 kts  135.0  13.3  148.2 Analysis Plot     
     20260705 055353  SSMISF18   13.5  147.9    34  100%   57.79   72.79  >85 kts  145.0  13.3  148.0 Analysis Plot     
     20260705 081433  SSMISF17   13.7  147.8    34  100%   50.85   65.85  >85 kts  145.0  13.6  147.7 Analysis Plot     
     20260705 155115     AMSR2   13.8  146.4    34  100%   51.65   66.65  >85 kts  155.0  14.1  145.8 Analysis Plot     
     20260705 182926  SSMISF18   13.9  145.8    34  100%   45.59   60.59  >85 kts  155.0  14.1  145.6 Analysis Plot     
     20260705 205052  SSMISF17   14.0  145.6    34  100%   46.27   61.27  >85 kts  155.0  14.3  145.3 Analysis Plot     
     20260706 080102  SSMISF17   15.2  143.4    23  100%   43.70   58.70  >65 kts  145.0  15.1  143.2 Analysis Plot     
     20260706 120537       GMI   15.4  142.7    23  100%   29.15   44.15  >65 kts  145.0  15.3  142.6 Analysis Plot     
     20260706 203537  SSMISF17   15.7  140.4    79  100%   36.69   51.69  >65 kts  135.0  16.0  140.1 Analysis Plot     
     20260706 233712       GMI   16.1  139.8   N/A   N/A     N/A     N/A      N/A  135.0  16.1  139.8 Analysis Plot     
     20260707 070650  SSMISF18   16.7  138.1   101  100%   55.81   70.81  >85 kts  125.0  16.5  138.1 Analysis Plot     
     20260707 091547  SSMISF16   16.8  137.4    90   44%   26.09   26.09  >65 kts  125.0  16.6  137.6 Analysis Plot     
     20260707 194128  SSMISF18   16.5  135.0    90  100%   54.45   69.45  >85 kts  130.0  16.9  134.6 Analysis Plot     
     20260708 091418  SSMISF17   17.3  132.5    57  100%   33.67   48.67  >65 kts  135.0  17.0  132.3 Analysis Plot     
     20260708 121542       GMI   17.3  131.8    68  100%   23.62   38.62  >65 kts  120.0  17.1  131.9 Analysis Plot     
     20260709 090026  SSMISF17   19.3  128.7   146   14%    3.67    3.67      N/A  110.0  19.0  128.5 Analysis Plot     
     20260709 230214       GMI   21.0  127.4   N/A   N/A     N/A     N/A      N/A   95.0  20.7  127.6 Analysis Plot     
     20260710 084754  SSMISF17   22.4  126.4   N/A   N/A     N/A     N/A      N/A   95.0  22.2  126.4 Analysis Plot     
     20260710 203815  SSMISF18   24.2  124.6   146   15%    1.91    1.91      N/A   85.0  24.6  124.5 Analysis Plot     
     20260710 224657  SSMISF16   24.6  124.1   135   12%    2.64    2.64      N/A   85.0  25.0  124.2 Analysis Plot     
     20260711 100523  SSMISF16   26.7  120.6   N/A   N/A     N/A     N/A      N/A   80.0  27.5  122.3 Analysis Plot     
     20260711 202229  SSMISF18   29.4  120.3   N/A   N/A     N/A     N/A      N/A   60.0  29.4  119.7 Analysis Plot     
     20260711 224301  SSMISF17   29.8  119.9    23   N/A    2.93    2.93      N/A   60.0  29.7  119.4 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.