Tropical Depression 05W

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                 
     20250704 050625     AMSR2   20.2  118.4   223   21%    4.58   -4.58      N/A   25.0  19.7  118.5 Analysis Plot     
     20250704 105431       GMI   20.3  117.3   N/A   N/A     N/A     N/A      N/A   30.0  19.8  118.0 Analysis Plot     
     20250705 001828       GMI   20.1  118.5   N/A   N/A     N/A     N/A      N/A   40.0  20.3  117.2 Analysis Plot     
     20250705 054921     AMSR2   20.4  117.9    46   42%   19.41  -19.41      N/A   45.0  20.5  117.5 Analysis Plot     
     20250705 101128       GMI   20.3  118.5    57   12%    0.87    0.87      N/A   55.0  20.8  118.0 Analysis Plot     
     20250705 175905     AMSR2   21.0  118.0    12   75%    3.26    3.26      N/A   65.0  21.5  118.3 Analysis Plot     
     20250705 233709       GMI   21.5  118.2   N/A   N/A     N/A     N/A      N/A   65.0  21.6  118.5 Analysis Plot     
     20250706 045525     AMSR2   21.9  118.8    12  100%   33.61   48.61  >65 kts   70.0  22.4  118.9 Analysis Plot     
     20250706 073132  SSMISF18   22.3  118.9    12   82%   13.57   13.57      N/A   70.0  22.6  119.1 Analysis Plot     
     20250707 071838  SSMISF18   26.4  121.4   190   11%    2.53   -2.53      N/A   40.0  26.5  121.9 Analysis Plot     
     20250707 103915  SSMISF16   27.2  122.0   235   N/A    0.92   -0.92      N/A   40.0  27.3  121.8 Analysis Plot     
     20250707 174455     AMSR2   28.3  122.8   N/A   N/A     N/A     N/A      N/A   40.0  27.9  122.1 Analysis Plot     
     20250707 194713  SSMISF18   28.3  122.4   168   15%    2.21   -2.21      N/A   40.0  27.9  122.1 Analysis Plot     
     20250708 044404     AMSR2   28.3  122.1   N/A   N/A     N/A     N/A      N/A   40.0  28.1  121.8 Analysis Plot     
     20250708 070543  SSMISF18   28.3  121.8   190   11%    1.00   -1.00      N/A   35.0  27.9  121.6 Analysis Plot     
     20250708 230803       GMI   27.7  119.1   N/A   N/A     N/A     N/A      N/A   35.0  27.5  120.0 Analysis Plot     
     20250709 052603     AMSR2   26.9  118.9   N/A   N/A     N/A     N/A      N/A   30.0  26.9  118.9 Analysis Plot     
     20250709 085759       GMI   27.5  118.6   N/A   N/A     N/A     N/A      N/A   30.0  26.6  118.4 Analysis Plot     
     20250709 100202  SSMISF17   27.5  118.4   N/A   N/A     N/A     N/A      N/A   30.0  26.5  118.2 Analysis Plot     
     20250709 101106  SSMISF16   27.6  118.4   N/A   N/A     N/A     N/A      N/A   30.0  26.3  117.9 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.