Tropical Storm 08E


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                 
     20250804 095900     AMSR2   14.5 -118.0   N/A   N/A     N/A     N/A      N/A   30.0  14.1 -119.2 Analysis Plot     
     20250804 144055  SSMISF17   14.9 -121.8   N/A   N/A     N/A     N/A      N/A   30.0  14.3 -120.1 Analysis Plot     
     20250804 150137  SSMISF16   14.8 -118.7   N/A   N/A     N/A     N/A      N/A   30.0  14.4 -120.3 Analysis Plot     
     20250805 015054  SSMISF17   15.6 -121.9    46   N/A    5.50   -5.50      N/A   45.0  15.2 -121.6 Analysis Plot     
     20250805 063935       GMI   15.9 -122.6    79    6%    5.79   -5.79      N/A   45.0  15.7 -122.8 Analysis Plot     
     20250805 181059       GMI   17.3 -125.0   N/A   N/A     N/A     N/A      N/A   45.0  16.6 -125.0 Analysis Plot     
     20250805 213340     AMSR2   17.5 -125.5   N/A   N/A     N/A     N/A      N/A   45.0  17.1 -125.9 Analysis Plot     
     20250806 221654     AMSR2   18.2 -132.1   N/A   N/A     N/A     N/A      N/A   45.0  18.2 -132.1 Analysis Plot     
     20250807 032719  SSMISF16   18.3 -132.5   212   N/A    4.95   -4.95      N/A   45.0  18.2 -132.5 Analysis Plot     
     20250807 064924       GMI   18.7 -133.4   N/A   N/A     N/A     N/A      N/A   45.0  18.3 -133.4 Analysis Plot     
     20250807 102844     AMSR2   19.0 -134.2   N/A   N/A     N/A     N/A      N/A   45.0  18.5 -134.8 Analysis Plot     
     20250807 153808  SSMISF17   19.1 -135.8   112   19%    4.19   -4.19      N/A   45.0  18.7 -136.0 Analysis Plot     
     20250807 230129     AMSR2   19.3 -137.8   N/A   N/A     N/A     N/A      N/A   40.0  19.0 -137.6 Analysis Plot     
     20250808 111122     AMSR2   19.9 -140.5    12   N/A    0.31   -0.31      N/A   35.0  19.4 -141.3 Analysis Plot     
     20250808 135843  SSMISF18   19.7 -141.4   179   N/A    2.04   -2.04      N/A   35.0  19.7 -141.6 Analysis Plot     
     20250808 154812  SSMISF16   19.9 -142.1   N/A   N/A     N/A     N/A      N/A   35.0  19.9 -142.1 Analysis Plot     
     20250809 065917       GMI   20.1 -145.1   N/A   N/A     N/A     N/A      N/A   30.0  20.4 -145.1 Analysis Plot     
     20250809 115429     AMSR2   21.6 -146.5    12   21%    7.63   -7.63      N/A   30.0  21.1 -146.6 Analysis Plot     
     20250809 171455  SSMISF16   22.1 -147.4   112   18%    1.96   -1.96      N/A   30.0  21.8 -147.5 Analysis Plot     
     20250809 224956     AMSR2   22.5 -148.3    34   25%    9.15   -9.15      N/A   35.0  22.6 -148.5 Analysis Plot     
     20250810 040514  SSMISF17   23.3 -149.2    57   26%    2.53   -2.53      N/A   35.0  23.1 -149.3 Analysis Plot     
     20250810 042909  SSMISF16   23.4 -149.4    68   31%    4.08   -4.08      N/A   35.0  23.5 -149.7 Analysis Plot     
     20250810 174243       GMI   25.1 -151.7    12   96%   19.97  -34.97      N/A   45.0  25.1 -152.0 Analysis Plot     
     20250810 233134     AMSR2   25.0 -152.6     5   N/A    6.91    6.91      N/A   70.0  26.4 -153.3 Analysis Plot     
     20250811 035206  SSMISF17   27.0 -154.0    46  100%   25.82   40.82  >65 kts   70.0  27.0 -154.0 Analysis Plot     
     20250811 041651  SSMISF16   27.0 -154.2    46   99%   19.84   34.84  >65 kts   70.0  27.1 -154.1 Analysis Plot     
     20250811 041706  SSMISF16   27.1 -154.1    46   97%   19.61   34.61  >65 kts   70.0  27.4 -154.4 Analysis Plot     
     20250811 145520  SSMISF18   28.6 -156.7    68   38%    5.54    5.54      N/A   70.0  29.0 -156.9 Analysis Plot     
     20250812 001833     AMSR2   30.3 -158.5   N/A   N/A     N/A     N/A      N/A   70.0  30.6 -158.8 Analysis Plot     
     20250812 080240       GMI   31.6 -160.1   N/A   N/A     N/A     N/A      N/A   65.0  31.7 -160.1 Analysis Plot     
     20250812 122215     AMSR2   32.5 -161.1    34   32%    1.84    1.84      N/A   60.0  32.8 -161.6 Analysis Plot     
     20250812 174949       GMI   33.5 -162.3    34    4%   10.94   10.94      N/A   60.0  33.3 -162.2 Analysis Plot     
     20250812 181105  SSMISF16   33.3 -162.4    57   N/A    5.65    5.65      N/A   55.0  33.5 -162.5 Analysis Plot     
     20250813 020250  SSMISF18   35.1 -164.4    57   N/A    5.02   -5.02      N/A   50.0  35.1 -164.1 Analysis Plot     
     20250813 053307  SSMISF16   35.9 -164.9    68   N/A    5.90   -5.90      N/A   50.0  35.8 -164.8 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.