Tropical Depression 10W

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                 
     20260702 104123  SSMISF17   18.0  110.8   135    6%    0.46   -0.46      N/A   30.0  17.8  111.1 Analysis Plot     
     20260702 183707     AMSR2   17.7  109.9   N/A   N/A     N/A     N/A      N/A   30.0  17.9  110.4 Analysis Plot     
     20260702 205306  SSMISF18   19.1  109.8    79   N/A    0.20   -0.20      N/A   30.0  17.9  110.3 Analysis Plot     
     20260702 231500  SSMISF17   18.9  109.5   N/A   N/A     N/A     N/A      N/A   30.0  17.8  109.9 Analysis Plot     
     20260703 022233       GMI   19.1  109.8   N/A   N/A     N/A     N/A      N/A   35.0  18.0  109.8 Analysis Plot     
     20260703 053142     AMSR2   19.6  109.8   N/A   N/A     N/A     N/A      N/A   35.0  18.1  109.5 Analysis Plot     
     20260703 102642  SSMISF17   19.2  108.3   N/A   N/A     N/A     N/A      N/A   35.0  18.1  109.2 Analysis Plot     
     20260703 225915  SSMISF17   19.9  108.0   123   22%    0.90   -0.90      N/A   40.0  20.6  108.3 Analysis Plot     
     20260704 002516  SSMISF16   20.3  108.5   201   21%    2.83   -2.83      N/A   45.0  20.8  108.2 Analysis Plot     
     20260704 061346     AMSR2   20.6  107.8   112   42%    0.11   -0.11      N/A   45.0  21.0  108.1 Analysis Plot     
     20260704 101343  SSMISF17   22.3  106.2   N/A   N/A     N/A     N/A      N/A   45.0  21.1  107.6 Analysis Plot     
     20260704 113924  SSMISF16   21.2  108.0    34   46%    1.20   -1.20      N/A   45.0  21.2  107.6 Analysis Plot     
     20260704 150416       GMI   21.4  107.8    34  100%   21.36  -36.36      N/A   50.0  21.6  107.8 Analysis Plot     
     20260704 182343     AMSR2   21.7  107.9    57  100%   53.72  -68.72      N/A   50.0  21.9  108.0 Analysis Plot     
     20260704 224441  SSMISF17   22.0  108.1    79   17%    1.25   -1.25      N/A   50.0  22.2  108.1 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.